/* ============================================================
   SetupAndHold Design System — Puzzle Page
   ============================================================ */

:root {
    color-scheme: dark;
    --bg: #0d1017;
    --bg-soft: rgba(255, 255, 255, 0.02);
    --text: #e7ecf3;
    --muted: #9ca3af;
    --accent: #7cf2c9;
    --accent-2: #6cb1ff;
    --card: rgba(255, 255, 255, 0.04);
    --border: rgba(255, 255, 255, 0.08);
    --radius: 16px;
    --shadow: 0 10px 50px rgba(0, 0, 0, 0.35);
    --font: 'Space Grotesk', 'Segoe UI', system-ui, -apple-system, sans-serif;

    --panel-title-font-size: 1rem;
    --panel-title-weight: 600;
    --panel-title-color: var(--text);
    --panel-title-padding: 8px 0;
    --panel-title-margin: 8px;
    --panel-title-border: 1px solid var(--border);
}

:root[data-theme='light'] {
    color-scheme: light;
    --bg: #f7f9fc;
    --bg-soft: rgba(0, 0, 0, 0.04);
    --text: #0f172a;
    --muted: #4b5563;
    --accent: #0f9b73;
    --accent-2: #2563eb;
    --card: rgba(255, 255, 255, 0.9);
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    color: var(--text);
    background: radial-gradient(circle at 20% 20%, rgba(124, 242, 201, 0.08), transparent 25%),
        radial-gradient(circle at 80% 0%, rgba(108, 177, 255, 0.1), transparent 30%),
        linear-gradient(135deg, #0b0f16 0%, #0d1017 50%, #0b0f16 100%);
    min-height: 100vh;
    padding: 0;
    margin: 0;
}

:root[data-theme='light'] body {
    background: radial-gradient(circle at 20% 20%, rgba(15, 155, 115, 0.08), transparent 25%),
        radial-gradient(circle at 80% 0%, rgba(37, 99, 235, 0.08), transparent 30%),
        linear-gradient(135deg, #f6f8fb 0%, #f1f5f9 50%, #eef2f7 100%);
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

/* ── Puzzle piece animated background ── */
.puzzle-bg {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}
.puzzle-bg .bg-piece {
    position: absolute;
    width: 40px;
    height: 40px;
    opacity: 0;
    will-change: transform, opacity;
    animation: bgDrift linear infinite;
    cursor: pointer;
    pointer-events: auto;
}
.puzzle-bg .bg-piece svg {
    width: 100%;
    height: 100%;
    display: block;
    fill: currentColor;
    opacity: var(--icon-opacity, 0.15);
    filter: blur(var(--blur, 0.5px));
    transition: opacity 0.15s, filter 0.15s;
}
/* Hover: misma intensidad que el lanzamiento */
.puzzle-bg .bg-piece.bg-piece--hovering svg {
    opacity: var(--hover-opacity, 0.5);
    filter: blur(var(--hover-blur, 0px)) drop-shadow(0 0 8px currentColor);
}
:root[data-theme='light'] .puzzle-bg .bg-piece svg {
    opacity: var(--icon-opacity-light, 0.10);
    filter: blur(var(--blur, 0.5px));
}
:root[data-theme='light'] .puzzle-bg .bg-piece.bg-piece--hovering svg {
    opacity: var(--hover-opacity, 0.5);
    filter: blur(var(--hover-blur, 0px)) drop-shadow(0 0 4px currentColor);
}

/* Lanzamiento al hacer clic: sale disparada, gira y desaparece */
.puzzle-bg .bg-piece.bg-piece--launching {
    animation: bgLaunch var(--launch-dur, 0.55s) cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards !important;
    pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
    .puzzle-bg .bg-piece { animation: none; opacity: 0; }
    .puzzle-bg .bg-piece:nth-child(odd) { opacity: 1; }
    .puzzle-bg .bg-piece:nth-child(odd) svg { opacity: 0.04; }
    .puzzle-bg .bg-piece.bg-piece--launching { animation: none !important; opacity: 0 !important; }
}

@keyframes bgLaunch {
    0%   { transform: translate(0, 0) rotate(var(--r0)) scale(var(--s)); opacity: var(--peak-o); }
    15%  { transform: translate(calc(var(--lx) * 0.1), calc(var(--ly) * 0.1)) rotate(calc(var(--r0) + var(--lspin) * 0.2)) scale(calc(var(--s) * 1.35)); opacity: var(--peak-o); }
    100% { transform: translate(var(--lx), var(--ly)) rotate(calc(var(--r0) + var(--lspin))) scale(0); opacity: 0; }
}

@keyframes bgDrift {
    0%   { transform: translate(0, 0)    rotate(var(--r0)) scale(var(--s)); opacity: 0; }
    8%   { opacity: var(--peak-o); }
    50%  { transform: translate(var(--dx), var(--dy)) rotate(calc(var(--r0) + var(--dr))) scale(var(--s)); opacity: var(--peak-o); }
    92%  { opacity: var(--peak-o); }
    100% { transform: translate(calc(var(--dx) * 2), calc(var(--dy) * 2)) rotate(calc(var(--r0) + var(--dr) * 2)) scale(var(--s)); opacity: 0; }
}

@keyframes studioZoom {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

@keyframes studioShake {
    0%, 100% { transform: rotateZ(0deg) translateX(0); }
    10% { transform: rotateZ(-8deg) translateX(-8px); }
    20% { transform: rotateZ(8deg) translateX(8px); }
    30% { transform: rotateZ(-8deg) translateX(-8px); }
    40% { transform: rotateZ(8deg) translateX(8px); }
    50% { transform: rotateZ(-6deg) translateX(-6px); }
    60% { transform: rotateZ(6deg) translateX(6px); }
    70% { transform: rotateZ(-4deg) translateX(-4px); }
    80% { transform: rotateZ(4deg) translateX(4px); }
    90% { transform: rotateZ(-2deg) translateX(-2px); }
}

/* ── Page shell & Navigation (mirrors BaseLayout.astro) ── */
.page-shell {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 20px 64px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-soft);
    color: var(--muted);
    font-size: 0.9rem;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}
.back-btn:hover {
    background: var(--card);
    color: var(--text);
}

.site-header {
    display: flex;
    align-items: center;
    padding: 12px 0;
}

.studio-hero {
    text-align: center;
    padding: 40px 0 8px;
}
.studio-hero h1 {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: clamp(2.8rem, 8vw, 4.5rem);
    letter-spacing: -0.04em;
    margin-bottom: 12px;
    filter: drop-shadow(0 0 40px color-mix(in srgb, var(--accent) 30%, transparent));
    animation: studioZoom 2.5s ease-in-out infinite;
    display: inline-block;
    cursor: pointer;
    transition: animation 0.2s;
}
.studio-hero h1:hover {
    animation: studioShake 0.6s ease-in-out;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: clamp(8px, 1.4vw, 12px);
    font-weight: 700;
    font-size: clamp(1.05rem, 2.4vw, 1.25rem);
    letter-spacing: -0.02em;
    text-transform: lowercase;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-logo {
    width: clamp(24px, 3.4vw, 36px);
    height: clamp(24px, 3.4vw, 36px);
    display: block;
}

.nav-links {
    display: flex;
    gap: 16px;
    font-size: 0.95rem;
    color: var(--muted);
}

.nav-links a {
    padding: 8px 12px;
    border-radius: 10px;
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
    background: var(--card);
    color: var(--text);
}

.page { margin-top: 32px; }

/* ── Footer (mirrors BaseLayout.astro) ── */
.site-footer {
    margin-top: 48px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    color: var(--muted);
    font-size: 0.95rem;
}

.site-footer .theme-toggle { margin-left: auto; }
.dot { opacity: 0.5; }

/* Theme toggle */
.theme-toggle {
    position: relative;
    width: 56px;
    height: 28px;
    padding: 0;
    border: none;
    background: #4a5568;
    border-radius: 50px;
    cursor: pointer;
    transition: background 0.3s ease;
    display: inline-flex;
    align-items: center;
}

.theme-toggle .toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: #fff;
    border-radius: 50%;
    transition: left 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle .slider-icon {
    display: none;
    color: #000;
    font-size: 14px;
    line-height: 1;
}

.theme-toggle .slider-icon.fi {
    width: 16px;
    height: 16px;
    background: #000;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
    -webkit-mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    mask-size: contain;
}

.theme-toggle .fi.fi-sc-brightness {
    -webkit-mask-image: url('https://cdn-icons-png.flaticon.com/512/18996/18996164.png');
    mask-image: url('https://cdn-icons-png.flaticon.com/512/18996/18996164.png');
}

.theme-toggle .fi.fi-sr-moon-stars {
    -webkit-mask-image: url('https://cdn-icons-png.flaticon.com/512/6853/6853973.png');
    mask-image: url('https://cdn-icons-png.flaticon.com/512/6853/6853973.png');
}

:root[data-theme='light'] .theme-toggle .slider-icon--light { display: inline-block; }
:root[data-theme='dark'] .theme-toggle .slider-icon--dark { display: inline-block; }

:root[data-theme='light'] .theme-toggle {
    background: #e2e8f0;
    justify-content: flex-end;
}

:root[data-theme='light'] .theme-toggle .toggle-slider {
    left: auto;
    right: 2px;
    background: #fff;
}

.theme-toggle:hover { background: #5a6578; }
:root[data-theme='light'] .theme-toggle:hover { background: #cbd5e0; }

@media (max-width: 720px) {
    .site-header {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        gap: 10px;
        position: static;
    }
    .brand {
        order: 1;
        width: 100%;
        justify-content: center;
        font-size: 1.25rem;
    }
    .brand-logo { width: 38px; height: 38px; }
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    .page-shell { padding: 24px 16px 48px; }
}

/* ── Container ── */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
}

h1 {
    color: var(--text);
    margin-bottom: 16px;
    text-align: center;
    font-size: clamp(2rem, 5vw, 2.5em);
    letter-spacing: -0.03em;
}

.subtitle {
    text-align: center;
    color: var(--muted);
    margin-bottom: 24px;
    font-size: 0.95em;
    line-height: 1.5;
}

h2 {
    color: var(--text);
    margin-bottom: 16px;
    font-size: 1.5em;
    letter-spacing: -0.02em;
}

h3 {
    color: var(--text);
    margin-bottom: 12px;
    font-size: 1.5em;
}

/* Puzzle Type Selector */
.puzzle-type-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 32px 0 40px 0;
    padding: 0 20px;
    max-width: 100%;
}

@media (max-width: 768px) {
    .puzzle-type-selector {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        padding: 0 10px;
    }
}

.puzzle-type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 20px 12px;
    border: 2px solid var(--accent);
    background: var(--card);
    color: var(--text);
    cursor: pointer;
    font-weight: 700;
    font-size: 0.95em;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-family: var(--font);
    min-height: 100px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.puzzle-type-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.puzzle-type-btn:hover::before {
    left: 100%;
}

.puzzle-type-btn:hover {
    transform: translateY(-4px);
    border-color: var(--accent-2);
    box-shadow: 0 8px 20px rgba(124, 242, 201, 0.2);
    background: var(--bg-soft);
}

.puzzle-icon-img {
    width: 56px;
    height: 56px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.3s;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.puzzle-type-btn:hover .puzzle-icon-img {
    transform: scale(1.15) rotate(5deg);
}

.puzzle-type-btn.active .puzzle-icon-img {
    filter: drop-shadow(0 4px 8px rgba(124, 242, 201, 0.4));
    animation: pulse-icon 0.4s ease-out;
}

.puzzle-label {
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    display: block;
}

.puzzle-type-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: var(--bg);
    border-color: var(--accent);
    box-shadow: 0 8px 25px rgba(124, 242, 201, 0.35);
    transform: scale(1.05);
}

@keyframes pulse-icon {
    0% { transform: scale(0.95) rotate(5deg); }
    50% { transform: scale(1.25) rotate(5deg); }
    100% { transform: scale(1.15) rotate(5deg); }
}

/* Puzzle Type Toggle (old) */
.puzzle-type-toggle {
    display: none;
}

/* View Mode Toggle */
.view-controls {
    display: none;
}

.view-toggle {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 100;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 2px solid var(--accent);
    border-radius: 8px;
    background: transparent;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.view-toggle:hover {
    border-color: var(--accent-2);
    box-shadow: 0 4px 12px rgba(124, 242, 201, 0.15);
}

.view-toggle input {
    display: none;
}

.view-toggle img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.view-toggle input:checked + img {
    opacity: 1;
}

.view-toggle input:checked {
    background: var(--accent);
}

.view-toggle:has(input:checked) {
    background: var(--accent);
    border-color: var(--accent);
}

/* ── Puzzle viewer reveal animation ────────────────────────────────────── */
.viewer-reveal {
    position: absolute;
    inset: 0;
    z-index: 9;
    pointer-events: none;
    border-radius: 10px;
    background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%);
    background-size: 200% 100%;
    transform: translateX(-110%);
    will-change: transform, background-position;
}

.viewer-reveal.is-entering {
    animation:
        reveal-sweep-in 160ms cubic-bezier(0.4, 0, 0.16, 1) both,
        reveal-shimmer 600ms linear 160ms infinite;
}

.viewer-reveal.is-exiting {
    animation: reveal-sweep-out 200ms cubic-bezier(0.84, 0, 0.6, 1) forwards;
}

@keyframes reveal-sweep-in {
    from { transform: translateX(-110%); }
    to   { transform: translateX(0); }
}

@keyframes reveal-sweep-out {
    from { transform: translateX(0); }
    to   { transform: translateX(110%); }
}

@keyframes reveal-shimmer {
    from { background-position: 0% 50%; }
    to   { background-position: 200% 50%; }
}

/* ── STL viewer loading overlay ─────────────────────────────────────── */
.stl-loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    border-radius: inherit;
    background: rgba(8, 10, 18, 0.52);
    display: none;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.stl-loading-overlay.is-active {
    display: flex;
}
/* Sweeping shimmer band — transform runs on compositor thread, never freezes */
.stl-loading-overlay::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(124, 242, 201, 0.07) 40%,
        rgba(124, 242, 201, 0.13) 50%,
        rgba(124, 242, 201, 0.07) 60%,
        transparent 100%
    );
    animation: stl-shimmer-sweep 2.2s ease-in-out infinite;
    will-change: transform;
}
/* Spinning ring — compositor thread */
.stl-loading-overlay::after {
    content: '';
    position: relative;
    z-index: 1;
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--accent, #7cf2c9);
    border-radius: 50%;
    animation: stl-spin 0.85s linear infinite;
    will-change: transform;
}
@keyframes stl-shimmer-sweep {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}
@keyframes stl-spin {
    to { transform: rotate(360deg); }
}

.view-btn.active {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 5px 15px rgba(124, 242, 201, 0.3);
}

.panel {
    background: var(--card);
    border-left: 5px solid var(--accent);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.panel:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* ── Config panel: two-column layout ── */
.config-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: stretch;
}

.config-col-left {
    display: flex;
    flex-direction: column;
    gap: 0;
    min-height: 0; /* allow flex children to scroll if needed */
}

/* Make the scrollable area grow so the generate area can stick to the bottom */
.config-left-scroll {
    flex: 1 1 auto;
    min-height: 0;
    overflow: auto;
}

.generate-area {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.config-col-right {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Responsive wrapper for the puzzle preview viewer */
.config-viewer-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-soft);
}

.config-viewer-wrapper canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
    border-radius: 10px;
}

/* The fractal SVG container must fill the wrapper exactly */
#fractal-puzzle-svg {
    width: 100%;
    height: 100%;
}

/* "No puzzle yet" hint overlay inside the viewer */
.config-viewer-hint {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1em;
    color: var(--muted);
    background: rgba(13, 16, 23, 0.85);
    border-radius: 10px;
    pointer-events: none;
    text-align: center;
    padding: 20px;
}

:root[data-theme='light'] .config-viewer-hint {
    background: rgba(247, 249, 252, 0.85);
}

/* Stack to single column on narrow viewports */
@media (max-width: 700px) {
    .config-two-col {
        grid-template-columns: 1fr;
    }
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    /* horizontal-only gap: column-gap 16px, no row gap */
    gap: 0 16px;
    margin-bottom: 16px;
}

.stl-config-columns {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 15px;
}

.stl-config-columns.stl-config-columns-2 {
    grid-template-columns: 1fr 1fr;
}

.stl-config-col {
    background: var(--card);
    border-radius: 8px;
    padding: 16px;
    border: 1px solid var(--border);
}

.stl-config-col-full {
    grid-column: 1 / -1;
}

.stl-config-col h4 {
    margin: 0 0 12px 0;
    font-size: 1em;
    color: var(--text);
}

.stl-config-col .form-grid {
    grid-template-columns: 1fr;
    margin-bottom: 0;
}

.stl-config-col-relleno > .form-grid {
    grid-template-columns: 1fr 1fr;
}

/* Acabados mode switch */
.acabados-mode-switch {
    display: flex;
    flex-direction: row;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    min-width: 0;
    height: 100%;
}

.acabados-mode-label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 12px 16px;
    cursor: pointer;
    background: var(--card);
    color: var(--text);
    transition: background 0.2s, color 0.2s;
    font-size: 1.05em;
    user-select: none;
    border: none;
    border-right: 1px solid var(--border);
}

.acabados-mode-label:last-child {
    border-right: none;
}

.acabados-mode-label input[type="radio"] {
    display: none;
}

.acabados-mode-label.active {
    background: var(--accent);
    color: var(--bg);
    font-weight: 600;
}

.acabados-mode-label:not(.active):hover {
    background: var(--bg-soft);
}

#acabados-infill-panel,
#acabados-texture-panel,
#acabados-image-panel {
    grid-column: 1 / -1;
}

/* Second row: Relleno takes most space, Download column beside it */
.stl-config-col-download {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.stl-config-col-download .stl-download-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 16px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-group label {
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text);
    font-size: 0.9em;
}

.form-group input,
.form-group select {
    padding: 10px;
    border: 2px solid var(--border);
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s;
    background: var(--card);
    color: var(--text);
    font-family: var(--font);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group input:disabled {
    background: var(--bg-soft);
    color: var(--muted);
    border-color: var(--border);
    cursor: not-allowed;
}

/* Infill sub-options */
.infill-opts, .texture-opts {
    display: none;
    grid-column: 1 / -1;
}

.infill-opts.active, .texture-opts.active, .image-opts {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 12px;
    background: var(--card);
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Form-group spacing inside opts collapsible bodies — matches sub-panel feel */
.infill-opts .collapsible-body,
.texture-opts .collapsible-body,
.image-opts .collapsible-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 2px;
}

/* image-opts active variant */
.image-opts.active {
    display: flex;
}

/* No-options placeholder message */
.no-opts-placeholder .no-opts-text {
    color: var(--muted);
    font-size: 0.88em;
    font-style: italic;
    text-align: center;
    padding: 8px 0;
    line-height: 1.5;
}

/* Piece (corner) sub-options */
.piece-opts {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 10px;
    margin-top: 8px;
    background: var(--bg-soft);
    border-radius: 6px;
    border: 1px dashed var(--border);
    grid-column: 1 / -1;
}

.form-group .hint {
    font-size: 0.78em;
    color: var(--muted);
    margin-top: 3px;
    font-weight: 400;
}

.viewer-controls-hint {
    font-size: 0.82em;
    color: var(--muted);
    margin: 4px 0 8px 0;
    font-style: italic;
}

/* Viewer toolbar: hint + mode selector side by side */
.viewer-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin: 6px 0 10px 0;
}

.viewer-update-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    width: 100%;
}

.viewer-auto-update-label {
    font-size: 0.85em;
    white-space: nowrap;
}

/* Mode selector: 3 mutually-exclusive checkbox-style buttons */
.viewer-mode-selector {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.viewer-mode-option {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 20px;
    border: 2px solid var(--border);
    background: var(--card);
    font-size: 0.88em;
    font-weight: 500;
    color: var(--muted);
    user-select: none;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.viewer-mode-option input[type="checkbox"] {
    display: none;
}

.viewer-mode-option.active,
.viewer-mode-option:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--bg);
}

/* Download section */
.stl-download-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.color-picker-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.color-picker-row input[type="color"] {
    -webkit-appearance: none;
    border: 2px solid var(--border);
    border-radius: 6px;
    width: 40px;
    height: 32px;
    padding: 2px;
    cursor: pointer;
    background: transparent;
}

.color-picker-row input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-picker-row input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.color-hex {
    font-family: monospace;
    font-size: 0.85em;
    color: var(--muted);
}

.stl-download-section h4 {
    margin: 0 0 2px 0;
    font-size: 1em;
    color: var(--text);
}

.stl-download-hint {
    font-size: 0.85em;
    color: var(--muted);
    margin-bottom: 15px;
    font-style: italic;
}

.stl-download-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* T2 — Secondary action (primary download: 3MF / multicolor) */
.btn-t2 {
    flex: 1;
    min-width: 140px;
    padding: 10px 16px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
    font-family: var(--font);
}

.btn-t2:hover {
    background: var(--bg-soft);
    border-color: var(--accent);
    color: var(--accent);
}

/* T3 — Ghost download (STL piece buttons and secondary downloads) */
.btn-t3 {
    flex: 1;
    min-width: 140px;
    padding: 10px 16px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
    font-family: var(--font);
}

.btn-t3:hover {
    background: var(--bg-soft);
    border-color: var(--accent);
    color: var(--accent);
}

/* T1 — Primary action (generate puzzle): most prominent button on the page */
.btn-t1 {
    flex: 1;
    min-width: 140px;
    padding: 20px 16px !important;
    background: var(--accent);
    border: 2px solid var(--accent);
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    color: var(--bg);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
    font-family: var(--font);
}

.btn-t1:hover {
    background: var(--accent-2);
    border-color: var(--accent-2);
    color: #fff;
    box-shadow: 0 5px 20px rgba(124, 242, 201, 0.3);
}

/* Ripple effect for T1 buttons */
.btn-t1 .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}
.disclaimer {
    margin-top: 8px;
    padding: 8px 12px;
    background: rgba(124, 242, 201, 0.1);
    border: 1px solid rgba(124, 242, 201, 0.3);
    border-radius: 6px;
    font-size: 0.82em;
    color: var(--accent);
    line-height: 1.45;
}

/* Buttons */
.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    font-family: var(--font);
}

.btn-primary {
    background: var(--accent);
    color: var(--bg);
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(124, 242, 201, 0.3);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn {
    background: var(--accent);
    color: var(--bg);
    margin-right: 0px;
}

.btn:hover {
    background: var(--accent-2);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(124, 242, 201, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-success {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
}

.btn-success:hover {
    background: linear-gradient(135deg, #38a169 0%, #2f855a 100%);
}

/* Status */
.status {
    padding: 12px 16px;
    margin: 0;
    border-radius: 8px;
    font-weight: 600;
    display: none;
    min-height: 20px;
    text-align: left;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.status.info {
    display: block;
    background: rgba(108, 177, 255, 0.1);
    color: var(--accent-2);
    border-left: 5px solid var(--accent-2);
}

.status.success {
    display: block;
    background: rgba(124, 242, 201, 0.1);
    color: var(--accent);
    border-left: 5px solid var(--accent);
}

.status.error {
    display: block;
    background: rgba(229, 62, 62, 0.1);
    color: #f87171;
    border-left: 5px solid #e53e3e;
}

/* Canvas Area */
.puzzle-gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 20px;
    padding: 30px;
    border-radius: 12px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.solutions-section {
    margin-top: 20px;
    padding: 20px;
    border-radius: 12px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.solutions-section h3 {
    text-align: center;
    margin-bottom: 15px;
}

.canvas-section {
    text-align: center;
    background: var(--card);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    min-width: 0;
    border: 1px solid var(--border);
}

.canvas-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.canvas-section h3 {
    margin-bottom: 15px;
    color: var(--accent);
    font-size: 1.2em;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
}

.canvas-section canvas {
    border: none;
    border-radius: 8px;
    background: var(--bg-soft);
    max-width: 100%;
    height: auto;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto;
}

/* Solutions Panel */
.solution-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.solution-controls .btn {
    flex: 1;
    min-width: 150px;
    margin-right: 0;
}

.solution-info {
    padding: 10px;
    background: rgba(108, 177, 255, 0.1);
    border-radius: 5px;
    color: var(--accent-2);
    font-weight: 600;
    text-align: center;
}

/* Solutions Preview Grid */
.solutions-preview {
    margin-top: 20px;
}

.solutions-pagination,
.gallery-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.sol-page-info {
    font-weight: 600;
    color: var(--muted);
    font-size: 1em;
    min-width: 120px;
    text-align: center;
}

.btn-page {
    padding: 8px 16px;
    font-size: 0.9em;
    min-width: auto;
    flex: 0;
}

.solutions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.sol-card {
    background: var(--card);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 12px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border);
}

.sol-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.sol-card-title {
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
    font-size: 0.95em;
}

.sol-card canvas {
    border: none;
    border-radius: 6px;
    background: var(--bg-soft);
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Export Buttons */
.export-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

.stl-check-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.95em;
    color: var(--text);
    user-select: none;
}

.stl-check-label input[type="checkbox"] {
    width: auto;
    padding: 0;
    margin: 0;
    accent-color: var(--accent);
}

/* Improve visibility of native number input spinners */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    opacity: 1;
    height: 24px;
}

/* (panel-title vars defined in main :root above) */

/* Single unified rule for ALL collapsible headers (main and sub) */
.collapsible-header,
.collapsible-sub {
    cursor: pointer;
    display: flex;
    align-items: center;
    user-select: none;
    padding: var(--panel-title-padding, 8px 0);
    margin: 0 0 var(--panel-title-margin, 8px) 0;
    transition: color 0.2s, border-color 0.2s;
    font-size: var(--panel-title-font-size, 1rem);
    font-weight: var(--panel-title-weight, 600);
    color: var(--panel-title-color, #333);
    /* Reset any h-tag browser defaults */
    line-height: 1.4;
    text-transform: none;
    letter-spacing: normal;
}

/* Divider only visible when section is open */
.collapsible-header:not(.collapsed),
.collapsible-sub:not(.collapsed) {
    border-bottom: var(--panel-title-border, 1px solid #e0e0e0);
}

.collapsible-header:hover,
.collapsible-sub:hover {
    color: var(--accent);
}

.collapse-arrow {
    /* Fixed size, independent of parent font-size (prevents em inheritance quirks) */
    font-size: 1rem;
    flex-shrink: 0;
    transition: transform 0.25s;
    display: inline-block;
    margin-left: 8px;
    /* Push to right end in flex container */
    order: 10;
}

.collapsible-header.collapsed .collapse-arrow {
    transform: rotate(-90deg);
}

.collapsible-body {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.25s ease;
    max-height: 2000px;
    opacity: 1;
}

.collapsible-body.collapsed {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
}

.section-reset-btn {
    order: 2;
    margin-left: auto;
    margin-right: 4px;
    font-size: 1.1em;
    color: var(--muted);
    cursor: pointer;
    padding: 0 4px;
    border-radius: 4px;
    line-height: 1;
}
.section-reset-btn:hover {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}

/* 3-state direction switch */
.direction-switch-3 {
    display: flex;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}
.direction-switch-3 .dir-btn {
    flex: 1;
    padding: 5px 8px;
    border: none;
    background: var(--card);
    color: var(--muted);
    font-size: 0.82em;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
    font-family: var(--font);
}
.direction-switch-3 .dir-btn + .dir-btn {
    border-left: 1px solid var(--border);
}
.direction-switch-3 .dir-btn.active {
    background: var(--accent-2);
    color: #fff;
    font-weight: 600;
}
.direction-switch-3 .dir-btn:hover:not(.active) {
    background: var(--bg-soft);
}


/* Acabados panel layout */
.acabados-panel {
    margin-bottom: 20px;
    position: relative;
}

.acabados-layout {
    display: grid;
    grid-template-columns: 50fr 50fr;
    gap: 20px;
    align-items: start;
}

.acabados-config {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Row 1: [Mode switch | Mode-specific options] */
.acabados-row1 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    align-items: stretch;
    margin-top: 12px;
}

/* Row 2: [2D viewer | 3D viewer] */
.acabados-row2 {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 12px;
    align-items: stretch;
    margin-top: 12px;
}

.acabados-controls-compact {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.acabados-3d-col {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.acabados-texture-inline-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
    align-items: end;
}

/* Normalize select + button heights inside the 3-col inline row */
.acabados-texture-inline-row .form-group .btn-small {
    height: 47px;
    min-height: 47px;
    padding: 0 14px;
    box-sizing: border-box;
}

/* Place 'Invertir' checkbox justified to the bottom of its column with a small bottom margin */
#acabados-texture-panel .acabados-texture-inline-row .form-group:last-child {
    align-self: end;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 12px; /* espacio desde abajo */
}

/* Ensure the checkbox label itself centers horizontally inside the column */
#acabados-texture-panel .acabados-texture-inline-row .form-group:last-child .stl-check-label {
    margin: 0 auto;
    justify-content: center;
}

/* Row 4: 2-column grid [params | common] (piece & base moved to Advanced 3D Config) */
.acabados-row4-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
    align-items: stretch;
}

.acabados-col-params,
.acabados-col-common {
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
}

/* Puzle / Base: colors+corners side by side, dims in 3 cols */
.puzle-color-corners-grid {
    display: block;
    gap: 12px;
    align-items: start;
}

.puzle-colors-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    align-items: center;
}

.puzle-corners-container {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    margin-top: 12px;
}

.puzle-corners-container .collapsible-header {
    margin: 0 0 8px 0;
}

/* Remove inner collapsible-body visual container so only the outer box is visible */
.puzle-corners-container .collapsible-body {
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
}

.puzle-dims-grid {
    display: grid;
    /* allow columns to shrink below their content by using minmax(0, 1fr)
       this prevents overflow when the container is narrow */
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 8px;
}

/* Ensure grid children can shrink and inputs/selects don't force overflow */
.puzle-dims-grid .form-group {
    min-width: 0;
    margin-bottom: 0;
}
.puzle-dims-grid input,
.puzle-dims-grid select,
.puzle-dims-grid .slider-number-group {
    max-width: 100%;
    box-sizing: border-box;
}

@media (max-width: 1200px) {
    .acabados-row4-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .acabados-row1,
    .acabados-row2 {
        grid-template-columns: 1fr;
    }
    .acabados-row4-grid {
        grid-template-columns: 1fr;
    }
    .puzle-dims-grid {
        grid-template-columns: 1fr;
    }
    .puzle-color-corners-grid {
        grid-template-columns: 1fr;
    }
}



.acabados-sub-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    /* unified panel background to match puzzle/base container */
    background: var(--card);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.acabados-sub-panel .form-group {
    margin-bottom: 0;
}

.acabados-hint {
    font-size: 0.82em;
    color: var(--muted);
}

.acabados-puzle-base-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

@media (max-width: 680px) {
    .acabados-puzle-base-grid {
        grid-template-columns: 1fr;
    }
}

.viewer-assembled-row {
    padding: 8px 0 4px 0;
    margin-bottom: 8px;
}

.acabados-colors-section {
    display: flex;
    flex-direction: row;
    gap: 8px;
    margin-top: 12px;
    padding: 10px;
    background: var(--bg-soft);
    border-radius: 6px;
    border: 1px dashed var(--border);
}

.acabados-colors-section .form-group {
    margin-bottom: 0;
    margin-top: 8px;
    font-style: italic;
}

/* 2D acabados viewer */
.acabados-viewer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.acabados-canvas-wrapper {
    position: relative;
    width: 100%;
}

#acabados-2d-canvas {
    width: 100%;
    /*max-width: 500px;*/
    height: auto;
    aspect-ratio: 1;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-soft);
    cursor: grab;
}

#acabados-2d-canvas:active {
    cursor: grabbing;
}

.acabados-nodrag-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 0.85em;
    pointer-events: none;
    z-index: 2;
    white-space: nowrap;
}

.acabados-inline3d-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: center;
    font-size: 0.85em;
    margin-top: 8px;
}

.inline3d-switch-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: default;
}

.switch-small {
    transform: scale(0.75);
    margin: 0;
}

#acabados-3d-inline {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-soft);
    overflow: hidden;
    height: 524px;
    position: relative;
}

/* Style the drag hint to match inline3d control labels */
#acabados-hint-drag {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85em;
    color: inherit;
    margin: 6px 0 0 0;
}

.acabados-viewer-info {
    font-size: 0.85em;
    color: var(--muted);
    text-align: center;
    font-style: italic;
}

/* Advanced viewer toggle header */
.advanced-viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.advanced-viewer-header h2 {
    margin: 0;
}

/* Toggle switch */
.switch-label {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.switch-label input {
    opacity: 0;
    width: 0;
    height: 0;
}
.switch-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--border);
    border-radius: 24px;
    transition: background-color 0.2s;
}
.switch-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text);
    border-radius: 50%;
    transition: transform 0.2s;
}
.switch-label input:checked + .switch-slider {
    background-color: var(--accent);
}
.switch-label input:checked + .switch-slider::before {
    transform: translateX(20px);
}

/* Range input styling */
.range-input {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    outline: none;
    margin: 4px 0;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

/* Disabled state for range and text inputs */
.range-input:disabled {
    background: var(--bg-soft);
    cursor: not-allowed;
    opacity: 0.6;
}

.range-input:disabled::-webkit-slider-thumb {
    background: var(--muted);
    cursor: not-allowed;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.slider-num-input:disabled {
    background-color: var(--bg-soft);
    color: var(--muted);
    cursor: not-allowed;
    border-color: var(--border);
}

/* ── Custom tooltip ─────────────────────────────────────────────────────────── */
#custom-tooltip {
    display: none;
    position: fixed;
    background: rgba(20, 20, 32, 0.96);
    color: #dde0f4;
    padding: 6px 11px;
    border-radius: 7px;
    font-size: 12px;
    line-height: 1.5;
    max-width: 270px;
    pointer-events: none;
    z-index: 99999;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.10);
    white-space: normal;
    word-break: break-word;
}

/* Dim the label text + inputs inside a form-group that has a [data-tooltip]
   (these are incompatible / locked controls) */
.form-group[data-tooltip] {
    cursor: not-allowed;
}
.form-group[data-tooltip] > label,
.form-group[data-tooltip] > input[type="number"],
.form-group[data-tooltip] > span {
    opacity: 0.42;
    pointer-events: none;
}
/* Also dim the checkbox label when the form-group label wraps the checkbox */
.form-group[data-tooltip] label {
    opacity: 0.42;
    cursor: not-allowed;
}

.range-value {
    font-size: 0.85em;
    font-weight: 600;
    color: var(--accent);
    margin-left: 6px;
}

/* Slider + number paired group */
.slider-number-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.slider-number-group .range-input {
    flex: 1;
    margin: 0;
}
.slider-num-input {
    width: 64px;
    padding: 3px 5px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85em;
    text-align: center;
    background: var(--card);
    color: var(--text);
    font-family: var(--font);
}

.form-group .range-input {
    margin-top: 4px;
}

/* Small button variant */
.btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 34px;
    padding: 6px 14px;
    font-size: 0.85em;
    border-radius: 6px;
}

.texture-custom-buttons {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}

/* Modal overlay */
.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(3px);
    border-radius: inherit;
}

.modal-content {
    background: var(--bg);
    border-radius: 12px;
    padding: 24px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.2em;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.8em;
    cursor: pointer;
    color: var(--muted);
    padding: 0 4px;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text);
}

/* Texture editor */
.texture-editor-content {
    max-width: 900px;
    width: 95vw;
}
.texture-editor-body {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}
.tex-editor-left {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.tex-editor-right {
    flex: 0 0 260px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 560px;
    overflow-y: auto;
    padding-right: 4px;
}
@media (max-width: 700px) {
    .texture-editor-body { flex-direction: column; }
    .tex-editor-right { flex: none; max-height: none; }
}

#texture-editor-canvas {
    display: block;
    width: 100%;
    max-width: 512px;
    height: auto;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: none;
    background: repeating-conic-gradient(var(--border) 0% 25%, transparent 0% 50%) 50% / 16px 16px;
}

/* Paint toolbar */
.tex-paint-toolbar {
    background: var(--card);
    border-radius: 8px;
    padding: 8px 10px;
    border: 1px solid var(--border);
}
.tex-paint-tools {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.tex-toolbar-label {
    font-size: 0.85em;
    font-weight: 500;
    white-space: nowrap;
}
.tex-color-swatches {
    display: flex;
    gap: 4px;
    align-items: center;
}
.tex-color-btn {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: transform 0.12s, box-shadow 0.12s;
    padding: 0;
    outline: none;
}
.tex-color-btn:hover {
    transform: scale(1.15);
}
.tex-color-btn.active {
    box-shadow: 0 0 0 3px var(--accent);
    transform: scale(1.1);
}
.tex-brush-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85em;
}
.tex-brush-icon {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text);
    transition: width 0.12s, height 0.12s;
}
.tex-tool-btn {
    font-size: 1em;
    padding: 2px 6px;
    min-width: 30px;
}
.tex-tool-btn.active {
    box-shadow: 0 0 0 2px var(--accent);
}

.texture-editor-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 16px;
}

/* Secondary button style for cancel/restore type actions */
.btn-secondary {
    background: var(--card);
    color: var(--text);
    border: 1.5px solid var(--border);
    padding: 12px 20px;
    border-radius: 5px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    transition: all 0.2s;
}
.btn-secondary:hover {
    background: var(--border);
}

/* Apply button in texture-editor-actions should not stretch to 100% */
.texture-editor-actions .btn-primary {
    width: auto;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    color: var(--bg);
    padding: 12px 24px;
}

/* ── Image multicolor mode ── */
.image-color-mode-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.image-color-mode-label-text {
    font-weight: 500;
}
.image-color-mode-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
}
.image-mode-text {
    font-size: 0.85em;
    color: var(--muted);
    transition: color 0.2s;
}
.image-mode-text.active {
    color: var(--accent);
    font-weight: 600;
}
.image-palette-swatches {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}
.palette-swatch {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: transform 0.12s, box-shadow 0.12s;
}
.palette-swatch:hover {
    transform: scale(1.15);
    box-shadow: 0 0 0 2px var(--accent);
}
.palette-swatch.editing {
    box-shadow: 0 0 0 3px var(--accent);
}
.palette-hint {
    font-size: 0.82em;
    color: var(--muted);
    font-style: italic;
}
.palette-edit-hint {
    font-size: 0.82em;
    color: var(--muted);
    font-weight: normal;
}
.slider-hint {
    font-size: 0.78em;
    color: var(--muted);
    font-style: italic;
    margin-top: 2px;
    display: block;
}
#image-edit-section {
    border-top: 1px solid var(--border);
    padding-top: 12px;
    margin-top: 4px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
/* Relief color group locked state */
.relief-color-locked {
    opacity: 0.4;
    pointer-events: none;
    position: relative;
}
.relief-color-locked-hint {
    font-size: 0.78em;
    color: var(--muted);
    font-style: italic;
    margin-top: 2px;
}

/* Viewer panel */
.viewer-panel {
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 1000px) {
    .puzzle-gallery-grid {
        grid-template-columns: 1fr;
    }

    .export-buttons {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .stl-config-columns {
        grid-template-columns: 1fr;
    }

    .stl-config-col-full .form-grid {
        grid-template-columns: 1fr;
    }

    .stl-config-col-relleno > .form-grid {
        grid-template-columns: 1fr;
    }

    .acabados-layout {
        grid-template-columns: 1fr;
    }


}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.8em;
    }

    .puzzle-gallery-grid {
        padding: 10px;
    }

    .solution-controls {
        flex-direction: column;
    }

    .solution-controls .btn {
        width: 100%;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .solutions-pagination {
        flex-wrap: wrap;
    }

    .btn-t1, .btn-t2, .btn-t3 {
        min-width: 100%;
        flex: 1 1 auto;
    }
}

/* ── Advanced 3D Configuration ── */
/* Advanced 3D panel: no extra top margin (kept consistent by wizard margins) */
#advanced-3d-config-panel {
    margin-top: 0;
}

#advanced-3d-config-panel .advanced-viewer-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

#advanced-3d-config-panel .advanced-viewer-header h2 {
    margin: 0;
    font-size: 1.5em;
}

/* Margin handled by wizard system */
#adv3d-config-content {
    /* margin-top removed: wizard controls spacing */
}

.adv3d-info-banner {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 14px;
    margin-bottom: 20px;
    background: rgba(108, 177, 255, 0.08);
    border: 1px solid rgba(108, 177, 255, 0.25);
    border-left: 4px solid var(--accent-2);
    border-radius: 8px;
    font-size: 0.88em;
    color: var(--text);
    line-height: 1.5;
}

.adv3d-info-banner strong {
    color: var(--accent-2);
}

.adv3d-section {
    margin-bottom: 24px;
}

.adv3d-section h3 {
    font-size: 1.3em;
    font-weight: 700;
    margin: 0 0 16px 0;
    color: var(--text);
    border-bottom: 2px solid var(--border);
    padding-bottom: 6px;
}

.adv3d-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
    align-items: stretch;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
}

.adv3d-settings {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
}

.adv3d-viewer {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    min-width: 0;
}

.mini-viewer-3d {
    width: 100%;
    flex: 1;                  /* grows to fill the row height set by .adv3d-settings */
    min-height: 150px;        /* prevents viewer collapsing when section is short */
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--bg-soft);
    overflow: hidden;
    position: relative;
}

.mini-viewer-3d canvas {
    position: absolute;
    inset: 0;
    width: 100% !important;
    height: 100% !important;
    display: block;
    border-radius: 8px;
    pointer-events: none;  /* mini-viewers are display-only */
    cursor: default;
}

/* Disabled overlay when toggle is off */
#advanced-3d-config-panel .adv3d-settings input:disabled {
    opacity: 0.45;
}

/* ============================================================
   Premium — Gold Indicator & Download Gating
   ============================================================ */

/* --- Gold shimmer on [data-premium] containers --- */
[data-premium] {
    border: 1px solid rgba(255, 200, 55, 0.22) !important;
    border-radius: 8px;
    background-color: rgba(255, 215, 0, 0.025) !important;
    background-image: linear-gradient(
        110deg,
        transparent 20%,
        rgba(255, 215, 0, 0.06) 35%,
        rgba(255, 215, 0, 0.13) 50%,
        rgba(255, 215, 0, 0.06) 65%,
        transparent 80%
    ) !important;
    background-size: 250% 100%;
    animation: premiumShimmer 5s ease-in-out infinite;
    padding: 6px 10px;
}

@keyframes premiumShimmer {
    0%, 100% { background-position: 200% center; }
    50%      { background-position: -200% center; }
}

/* --- Cursor-following tooltip --- */
.premium-tooltip {
    position: fixed;
    z-index: 100001;
    background: #151525;
    color: #ffd700;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.8em;
    font-weight: 600;
    border: 1px solid rgba(255, 200, 55, 0.35);
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
    opacity: 0;
    transition: opacity 0.15s;
    display: flex;
    align-items: center;
    gap: 8px;
}
.premium-tooltip.visible {
    opacity: 1;
}
.premium-tooltip span {
    font-weight: 400;
    font-size: 0.85em;
    color: #b0b0c0;
}

/* --- Download panel lock --- */
.premium-download-lock {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 22px 18px;
    margin-bottom: 14px;
    border: 1.5px solid rgba(255, 200, 55, 0.35);
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.04), rgba(255, 180, 0, 0.09));
    background-size: 250% 100%;
    animation: premiumShimmer 5s ease-in-out infinite;
    text-align: center;
}
.premium-download-lock-header {
    display: flex;
    align-items: center;
    gap: 8px;
}
.premium-download-lock-icon {
    font-size: 1.6em;
    color: #ffd700;
    text-shadow: 0 0 14px rgba(255, 215, 0, 0.5);
    line-height: 1;
}
.premium-download-lock-title {
    font-weight: 700;
    font-size: 1.05em;
    color: #ffd700;
    letter-spacing: 0.3px;
}
.premium-download-lock-text {
    color: var(--muted);
    font-size: 0.88em;
    line-height: 1.6;
    margin: 0;
}
.premium-download-lock-text strong {
    color: #ffd700;
}
.premium-download-lock-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}
.premium-gumroad-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 9px 20px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 800;
    font-size: 0.88em;
    letter-spacing: 0.02em;
    color: #2a1a00 !important;
    background: linear-gradient(120deg, #f7e08a, #d4af37) !important;
    border: 1px solid rgba(212, 175, 55, 0.55);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
    transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
}
.premium-gumroad-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.25);
}
.premium-download-lock-input-row {
    display: flex;
    gap: 8px;
    width: 100%;
    max-width: 340px;
}
.premium-download-lock-input-row .premium-code-input {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.9em;
}
.premium-verify-btn {
    padding: 8px 16px !important;
    border: 1.5px solid #ffd700 !important;
    border-radius: 8px !important;
    background: transparent !important;
    color: #ffd700 !important;
    font-weight: 700 !important;
    font-size: 0.85em !important;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.premium-verify-btn:hover {
    background: #ffd700 !important;
    color: #1a1a2e !important;
}
.premium-download-lock-error {
    color: #f87171;
    font-size: 0.85em;
    text-align: center;
}

/* Disabled download buttons */
.download-panel .stl-download-buttons .btn:disabled {
    opacity: 0.3 !important;
    pointer-events: none !important;
    filter: grayscale(0.6) !important;
    cursor: not-allowed !important;
}

/* Unlock button */
.premium-unlock-btn {
    margin-top: 4px;
    padding: 8px 22px;
    border: 1.5px solid #ffd700;
    border-radius: 8px;
    background: transparent;
    color: #ffd700;
    font-weight: 700;
    font-size: 0.85em;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
    letter-spacing: 0.3px;
}
.premium-unlock-btn:hover {
    background: #ffd700;
    color: var(--bg, #1a1a2e);
}

/* --- Unlock dialog (modal) --- */
.premium-dialog-backdrop {
    position: fixed;
    inset: 0;
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
}

.premium-dialog {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 28px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: premiumDialogIn 0.2s ease-out;
}
@keyframes premiumDialogIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.premium-dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.premium-dialog-header h3 {
    margin: 0;
    font-size: 1.15em;
    color: #ffd700;
}

.premium-dialog-text {
    color: var(--muted);
    font-size: 0.92em;
    margin-bottom: 16px;
    line-height: 1.5;
}

.premium-dialog-input-row {
    margin-bottom: 12px;
}
.premium-code-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: var(--card);
    color: var(--text);
    font-size: 1em;
    font-family: 'Space Mono', monospace, var(--font);
    letter-spacing: 2px;
    text-transform: uppercase;
    text-align: center;
    outline: none;
    transition: border-color 0.2s;
}
.premium-code-input:focus {
    border-color: #ffd700;
}

.premium-dialog-error {
    color: #f87171;
    font-size: 0.85em;
    text-align: center;
    margin-bottom: 10px;
}

.premium-dialog-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}
.premium-dialog-actions .btn-primary {
    width: auto;
    padding: 10px 22px;
}
.premium-dialog-actions .btn-secondary {
    padding: 10px 18px;
}
#advanced-3d-config-panel .adv3d-settings select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Collapsible panels inside adv3d: always open, no panel background ── */
#adv3d-config-content .puzle-corners-container {
    background: none;
    border: none;
    border-radius: 0;
    padding: 4px 0 0 0;
    margin-top: 4px;
}
#adv3d-config-content .collapsible-header.collapsible-sub {
    cursor: default;
    pointer-events: none;
    font-size: 1.1em;
    font-weight: 700;
    color: var(--text);
    padding: 0 0 6px 0;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
#adv3d-config-content .collapsible-header.collapsible-sub:not(.collapsed) {
    border-bottom: 1px solid var(--border);
}
#adv3d-config-content .collapsible-header.collapsible-sub:hover {
    color: var(--text-muted, #888);
}
#adv3d-config-content .collapsible-header.collapsible-sub .collapse-arrow {
    display: none;
}
#adv3d-config-content .collapsible-body {
    max-height: none !important;
    opacity: 1 !important;
    overflow: visible !important;
}

/* Subtle dashed container for logical sub-groups inside adv3d sections */
.adv3d-subgroup {
    border: 1px dashed var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    background: rgba(255,255,255,0.02);
}
.adv3d-subgroup > .form-group:last-child {
    margin-bottom: 0;
}

/* Disabled state visual cue for inner corner opts */
#base-inner-corner-opts input:disabled,
#base-inner-corner-opts select:disabled,
#sliding-base-inner-corner-opts input:disabled,
#sliding-base-inner-corner-opts select:disabled {
    opacity: 0.38;
    cursor: not-allowed;
}
#adv3d-config-content .acabados-sub-panel {
    background: none;
    border: none;
    border-radius: 0;
    padding: 0;
}
#adv3d-config-content .section-reset-btn {
    pointer-events: auto;
    cursor: pointer;
}

@media (max-width: 900px) {
    .adv3d-row {
        grid-template-columns: 1fr;
    }
    .mini-viewer-3d {
        min-height: 180px;
        max-height: 250px;
    }
}

/* --- 3D viewer --- */
#viewer-3d {
    width: 100%;
    height: 500px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--bg-soft);
    margin-bottom: 16px;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

/* Ensure the Three.js canvas (or any child canvas) fits and respects the rounded corners */
#viewer-3d canvas,
#viewer-3d > canvas {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: inherit;
    object-fit: cover;
}

/* ══ Wizard Step System ══════════════════════════════════════════════ */

.panel.wizard-step {
    transition: padding 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s ease,
                box-shadow 0.3s ease;
    scroll-margin-top: 20px;
    margin-bottom: 6px;
}

.panel.wizard-collapsed {
    padding-top: 14px;
    padding-bottom: 14px;
    border-left-color: var(--border);
    box-shadow: none;
}

.panel.wizard-collapsed:hover {
    border-left-color: color-mix(in srgb, var(--accent) 60%, var(--border));
    box-shadow: var(--shadow);
}

.panel.wizard-active {
    border-left-color: var(--accent);
    margin-bottom: 6px;
}

.panel.wizard-done {
    border-left-color: color-mix(in srgb, var(--accent) 30%, var(--border));
    margin-bottom: 6px;
}

/* ── Step header ── */
.wizard-step-header {
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.wizard-step-header h2 {
    flex: 1;
    margin: 0 !important;
}

/* ── Step number badge ── */
.wizard-step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--border);
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    line-height: 1;
}

.wizard-active .wizard-step-number {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    box-shadow: 0 2px 12px color-mix(in srgb, var(--accent) 35%, transparent);
}

.wizard-done .wizard-step-number {
    background: var(--accent);
    color: #fff;
}

/* ── Chevron indicator ── */
.wizard-step-chevron {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    position: relative;
}

.wizard-step-chevron::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: translate(-50%, -70%) rotate(45deg);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s;
}

.wizard-active .wizard-step-chevron::before {
    transform: translate(-50%, -30%) rotate(-135deg);
    border-color: var(--accent);
}

/* ── Content area — smooth collapse/expand via CSS grid ── */
.wizard-step-content {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.wizard-active .wizard-step-content {
    grid-template-rows: 1fr;
}

.wizard-step-content-inner {
    overflow: hidden;
    padding-top: 0;
}

.wizard-active .wizard-step-content-inner {
    padding-top: 16px;
}

/* Hide toggle switches when panel is collapsed */
.wizard-collapsed .wizard-step-header .switch-label {
    opacity: 0;
    pointer-events: none;
    width: 0;
    min-width: 0;
    overflow: hidden;
    transition: opacity 0.2s, width 0.3s;
}

.wizard-active .wizard-step-header .switch-label {
    opacity: 1;
    pointer-events: auto;
    width: 44px;
    transition: opacity 0.3s 0.25s, width 0.3s;
}

/* Disable header clicks on future/locked steps */
.wizard-collapsed .wizard-step-header {
    cursor: auto;
    pointer-events: none;
}

.wizard-active .wizard-step-header {
    cursor: pointer;
    pointer-events: auto;
}

.wizard-done .wizard-step-header {
    cursor: pointer;
    pointer-events: auto;
}

/* ── Navigation buttons ── */
.wizard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}

.wizard-nav .wizard-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
}

.wizard-nav .wizard-prev {
    margin-right: auto;
}

.wizard-nav .wizard-next {
    margin-left: auto;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    border: none;
    box-shadow: 0 2px 10px color-mix(in srgb, var(--accent) 30%, transparent);
}

.wizard-nav .wizard-next:hover {
    filter: brightness(1.1);
    box-shadow: 0 4px 16px color-mix(in srgb, var(--accent) 45%, transparent);
}

.wizard-nav .wizard-prev:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 8%, var(--card));
}

.wizard-nav .wizard-btn:disabled,
.wizard-nav .wizard-btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    background: var(--bg-soft);
    border-color: var(--border);
    color: var(--muted);
    box-shadow: none;
    filter: none;
}

.wizard-nav .wizard-btn:disabled:hover,
.wizard-nav .wizard-btn[disabled]:hover {
    background: var(--bg-soft);
    border-color: var(--border);
}

@media (max-width: 700px) {
    .wizard-nav .wizard-btn {
        padding: 10px 18px;
        font-size: 0.85rem;
    }
}