:root {
    /* Base pink palette */
    --pink-50: #fdf2f8;
    --pink-100: #fce7f3;
    --pink-200: #fbcfe8;
    --pink-300: #f9a8d4;
    --pink-400: #f472b6;
    --pink-500: #ec4899;
    --pink-600: #db2777;
    --rose-50: #fff1f2;
    --rose-100: #ffe4e6;
    --cream: #fffbf7;

    /* Light mode semantic colors */
    --bg-primary: linear-gradient(135deg, var(--pink-50) 0%, var(--cream) 50%, var(--rose-50) 100%);
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-input: white;
    --bg-upload: linear-gradient(135deg, rgba(253, 242, 248, 0.5), rgba(255, 251, 247, 0.5));
    --bg-upload-hover: linear-gradient(135deg, var(--pink-100), var(--rose-100));
    --bg-preview: linear-gradient(135deg, var(--pink-50), var(--cream));
    --bg-stat: linear-gradient(135deg, var(--pink-50), white);
    --bg-decoration-1: var(--pink-200);
    --bg-decoration-2: var(--pink-300);
    --bg-decoration-3: var(--rose-100);
    --bg-toggle-off: #e0d5cc;

    --border-card: rgba(251, 207, 232, 0.5);
    --border-input: var(--pink-200);
    --border-output: var(--pink-200);

    --text-dark: #4a3728;
    --text-medium: #6b5344;
    --text-light: #9a8577;

    --shadow-soft: 0 4px 20px rgba(236, 72, 153, 0.1);
    --shadow-medium: 0 8px 30px rgba(236, 72, 153, 0.15);
    --shadow-strong: 0 12px 40px rgba(236, 72, 153, 0.2);

    --modal-overlay: rgba(0, 0, 0, 0.5);
    --modal-bg: white;

    --toast-bg: #4a3728;
    --toast-text: white;
    --toast-error: #dc2626;
}

/* Pink Dark Mode */
[data-theme="dark"] {
    --bg-primary: linear-gradient(135deg, #16121a 0%, #1c1520 50%, #18121c 100%);
    --bg-card: rgba(34, 28, 40, 0.92);
    --bg-input: #231d29;
    --bg-upload: linear-gradient(135deg, rgba(34, 28, 40, 0.6), rgba(28, 21, 32, 0.6));
    --bg-upload-hover: linear-gradient(135deg, #2e2636, #28202e);
    --bg-preview: linear-gradient(135deg, #231d29, #1c1520);
    --bg-stat: linear-gradient(135deg, #231d29, #2a2232);
    --bg-decoration-1: rgba(255, 61, 154, 0.14);
    --bg-decoration-2: rgba(255, 110, 180, 0.10);
    --bg-decoration-3: rgba(255, 45, 138, 0.07);
    --bg-toggle-off: #3e3546;

    --border-card: rgba(255, 110, 180, 0.20);
    --border-input: rgba(255, 110, 180, 0.30);
    --border-output: rgba(255, 110, 180, 0.25);

    /* High-contrast text with subtle pink warmth */
    --text-dark: #f2e8ee;
    --text-medium: #c4b0bc;
    --text-light: #8d7a88;

    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.45);
    --shadow-strong: 0 12px 40px rgba(0, 0, 0, 0.55);

    --modal-overlay: rgba(0, 0, 0, 0.7);
    --modal-bg: #231d29;

    --toast-bg: #f2e8ee;
    --toast-text: #1c1520;
    --toast-error: #f87171;

    /* Neon pink accents for dark mode */
    --pink-300: #ffb3e0;
    --pink-400: #ff6eb4;
    --pink-500: #ff3d9a;
    --pink-600: #ff2d8a;
    --pink-50: #2e2636;
    --pink-100: #3a3244;
    --pink-200: rgba(255, 110, 180, 0.25);
    --rose-50: #28202e;
    --rose-100: #2e2636;
    --cream: #1c1520;
}

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

html {
    background-color: #fdf2f8;
}

[data-theme="dark"] html,
html[data-theme="dark"] {
    background-color: #16121a;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-dark);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Decorative background elements */
.bg-decoration {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    pointer-events: none;
    z-index: -1;
}

.bg-decoration.one {
    width: 400px;
    height: 400px;
    background: var(--bg-decoration-1);
    top: -100px;
    right: -100px;
    transition: background 0.3s ease;
}

.bg-decoration.two {
    width: 300px;
    height: 300px;
    background: var(--bg-decoration-2);
    bottom: -50px;
    left: -50px;
    transition: background 0.3s ease;
}

.bg-decoration.three {
    width: 200px;
    height: 200px;
    background: var(--bg-decoration-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: background 0.3s ease;
}

/* Header - Compact inline */
header {
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    stroke: white;
    fill: none;
    stroke-width: 2;
}

h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--pink-500), var(--pink-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 400;
}

.about-link:hover {
    background: var(--pink-50);
    border-color: var(--pink-400) !important;
    color: var(--pink-600) !important;
}

[data-theme="dark"] .about-link:hover {
    background: var(--pink-100);
    color: var(--pink-500) !important;
}

/* Compact back button on about page */
main a[href="index.html"]:hover {
    background: var(--pink-50);
    border-color: var(--pink-400) !important;
    color: var(--pink-600) !important;
}

[data-theme="dark"] main a[href="index.html"]:hover {
    background: var(--pink-100);
    color: var(--pink-500) !important;
}

@media (max-width: 700px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
        padding: 1rem;
    }
}

/* Main container */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 1.5rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-card);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-medium);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title svg {
    width: 20px;
    height: 20px;
    stroke: var(--pink-500);
}

/* Upload area */
.upload-area {
    border: 2px dashed var(--pink-300);
    border-radius: 16px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-upload);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--pink-500);
    background: var(--bg-upload-hover);
    transform: scale(1.01);
}

.upload-area.has-file {
    border-color: var(--pink-400);
    border-style: solid;
    background: var(--pink-50);
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--pink-100), var(--pink-200));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--pink-600);
}

.upload-text {
    font-size: 1rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-light);
}

.filename {
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    color: var(--pink-600);
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--bg-input);
    border-radius: 8px;
    display: inline-block;
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.setting-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-medium);
}

.setting-group input {
    padding: 0.6rem 0.8rem;
    border: 1.5px solid var(--border-input);
    border-radius: 10px;
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-dark);
    background: var(--bg-input);
    transition: all 0.2s ease;
}

.setting-group input:focus {
    outline: none;
    border-color: var(--pink-400);
    box-shadow: 0 0 0 3px rgba(244, 114, 182, 0.2);
}

.setting-hint {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-toggle-off);
    border-radius: 24px;
    transition: all 0.3s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.toggle-switch input:checked+.toggle-slider {
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
}

.toggle-switch input:checked+.toggle-slider::before {
    transform: translateX(20px);
}

.toggle-switch input:focus+.toggle-slider {
    box-shadow: 0 0 0 3px rgba(244, 114, 182, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--pink-500), var(--pink-600));
    transform: translateY(-2px);
    box-shadow: var(--shadow-strong);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--pink-600);
    border: 2px solid var(--pink-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--pink-50);
    border-color: var(--pink-400);
}

.btn svg {
    width: 20px;
    height: 20px;
}

.button-row {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Preview area */
.preview-container {
    width: 100%;
    height: 300px;
    background: var(--bg-preview);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

#preview-canvas {
    width: 100%;
    height: 100%;
}

.preview-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.preview-placeholder svg {
    width: 48px;
    height: 48px;
    stroke: var(--pink-300);
    margin-bottom: 0.5rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.stat-item {
    background: var(--bg-stat);
    border-radius: 8px;
    padding: 0.4rem 0.5rem;
    text-align: center;
    border: 1px solid var(--border-card);
}

.stat-value {
    font-family: 'Space Mono', monospace;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--pink-600);
}

.stat-label {
    font-size: 0.65rem;
    color: var(--text-light);
    margin-top: 0.1rem;
}

/* Progress */
.progress-container {
    display: none;
    margin-top: 1rem;
}

.progress-container.visible {
    display: block;
}

.progress-bar {
    height: 8px;
    background: var(--pink-100);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--pink-400), var(--pink-500));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-medium);
    margin-top: 0.5rem;
    text-align: center;
}

/* Floating Download Panel */
.floating-download-panel {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 8px 32px rgba(236, 72, 153, 0.25), var(--shadow-strong);
    border: 2px solid var(--pink-300);
    z-index: 100;
    display: none;
    animation: slideUpBounce 0.4s ease;
}

.floating-download-panel.visible {
    display: block;
}

@keyframes slideUpBounce {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    70% {
        transform: translateY(-5px) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.floating-download-panel .panel-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-card);
}

.floating-download-panel .panel-header svg {
    width: 24px;
    height: 24px;
    stroke: var(--pink-500);
}

.floating-download-panel .panel-header span {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.floating-download-panel .download-buttons {
    display: flex;
    gap: 0.75rem;
}

.floating-download-panel .btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid var(--pink-400);
    background: linear-gradient(135deg, var(--pink-50), var(--bg-input));
    color: var(--pink-600);
}

.floating-download-panel .btn-download:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
    border-color: var(--pink-500);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

.floating-download-panel .btn-download:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.floating-download-panel .btn-download svg {
    width: 18px;
    height: 18px;
}

/* Schematics download row */
.floating-download-panel .download-schematics-row {
    margin-top: 0.6rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--border-card);
}

.floating-download-panel .download-schematics-row .btn-download-schematic {
    width: 100%;
    background: linear-gradient(135deg, var(--bg-input), var(--pink-50));
    border: 2px dashed var(--pink-400);
    color: var(--text-dark);
    font-size: 0.9rem;
}

.floating-download-panel .download-schematics-row .btn-download-schematic:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
    border-style: solid;
    border-color: var(--pink-500);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

@media (max-width: 600px) {
    .floating-download-panel {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }

    .floating-download-panel .download-buttons {
        flex-direction: column;
    }
}

/* Legacy output section (hidden on desktop, fallback) */
.output-section {
    display: none;
}

/* Hidden file input */
#file-input {
    display: none;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease backwards;
}

.card:nth-child(1) {
    animation-delay: 0.1s;
}

.card:nth-child(2) {
    animation-delay: 0.2s;
}

.card:nth-child(3) {
    animation-delay: 0.3s;
}

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--toast-bg);
    color: var(--toast-text);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-size: 0.95rem;
    box-shadow: var(--shadow-strong);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.error {
    background: var(--toast-error);
}

.toast.success {
    background: var(--pink-500);
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--modal-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--modal-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-strong);
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--pink-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--pink-100);
    display: flex;
    justify-content: flex-end;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 0.75rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--pink-300);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--pink-400);
    box-shadow: var(--shadow-strong);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    stroke: var(--pink-500);
    fill: none;
    stroke-width: 2;
    transition: all 0.3s ease;
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}
/* 3D Preview styles */
.preview-3d-section {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-input);
    padding-top: 1.5rem;
}

.preview-3d-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.preview-3d-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preview-3d-title svg {
    width: 20px;
    height: 20px;
    stroke: var(--pink-500);
}

.preview-toggle-group {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 0.25rem;
}

.preview-toggle-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-family: 'Outfit', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preview-toggle-btn:hover:not(:disabled) {
    color: var(--text-dark);
    background: rgba(236, 72, 153, 0.1);
}

.preview-toggle-btn.active {
    background: var(--pink-500);
    color: white;
}

.preview-toggle-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.preview-3d-container {
    position: relative;
    width: 100%;
    height: 350px;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 12px;
    overflow: hidden;
}

.preview-3d-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.preview-3d-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    gap: 0.75rem;
}

.preview-3d-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

.preview-3d-placeholder p {
    font-size: 0.875rem;
}

.preview-3d-controls {
    position: absolute;
    bottom: 0.75rem;
    left: 0.75rem;
    display: flex;
    gap: 0.5rem;
}

.preview-3d-control-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-card);
    border: 1px solid var(--border-input);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-medium);
    transition: all 0.2s ease;
}

.preview-3d-control-btn:hover {
    background: rgba(236, 72, 153, 0.1);
    color: var(--text-dark);
}

.preview-3d-control-btn svg {
    width: 16px;
    height: 16px;
}

.preview-3d-hint {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-light);
    background: var(--bg-card);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-input);
}

/* Card Tabs */
.card-tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 0.25rem;
    margin-bottom: 1rem;
}

.card-tab {
    flex: 1;
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-family: 'Outfit', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.card-tab:hover:not(:disabled):not(.active) {
    color: var(--text-dark);
    background: rgba(236, 72, 153, 0.1);
}

.card-tab.active {
    background: var(--pink-500);
    color: white;
}

.card-tab:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.card-tab-content {
    display: none;
}

.card-tab-content.active {
    display: block;
}

/* Artifact Toggle Group - prominent at top */
.artifact-toggles {
    display: flex;
    gap: 0.75rem;
    margin: 1.5rem 0 1rem;
}

.artifact-toggle-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    padding: 0.6rem 0.75rem;
    background: var(--bg-input);
    border-radius: 10px;
    border: 1.5px solid var(--border-input);
    transition: all 0.2s ease;
}

.artifact-toggle-item.active {
    border-color: var(--pink-400);
    background: var(--pink-50);
}

.artifact-toggle-item .artifact-icon {
    font-size: 1rem;
}

.artifact-toggle-item .artifact-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dark);
}

/* Collapsible Settings Section */
.collapsible-section {
    margin-top: 0.75rem;
    border: 1px solid var(--border-input);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.collapsible-section.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.collapsible-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.9rem;
    background: var(--bg-stat);
    cursor: pointer;
    user-select: none;
    transition: background 0.2s ease;
}

.collapsible-header:hover {
    background: var(--pink-50);
}

.collapsible-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.collapsible-header .section-icon {
    font-size: 0.9rem;
}

.collapsible-header .section-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.collapsible-header .section-summary {
    font-size: 0.75rem;
    color: var(--text-light);
    font-family: 'Space Mono', monospace;
    margin-left: 0.5rem;
}

.collapsible-header .chevron {
    width: 16px;
    height: 16px;
    stroke: var(--text-light);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.collapsible-section.expanded .chevron {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.collapsible-section.expanded .collapsible-content {
    max-height: 800px;
}

.collapsible-content-inner {
    padding: 0.9rem;
    border-top: 1px solid var(--border-input);
}

/* Smaller upload area variant (for 3MF upload) */
.upload-area.upload-area-small {
    padding: 1.25rem 1rem;
}

.upload-icon-small {
    width: 40px;
    height: 40px;
    margin: 0 auto 0.5rem;
    background: linear-gradient(135deg, var(--pink-100), var(--pink-200));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-icon-small svg {
    width: 20px;
    height: 20px;
    stroke: var(--pink-600);
}

/* Calibration wizard */
.cal-wizard-header {
    margin-bottom: 1.25rem;
}

.cal-step-indicators {
    display: flex;
    align-items: center;
    gap: 0;
    justify-content: center;
}

.cal-step-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.cal-step-dot:hover {
    border-color: var(--pink-300);
    color: var(--pink-500);
}

.cal-step-dot.active {
    background: linear-gradient(135deg, var(--pink-400), var(--pink-500));
    border-color: var(--pink-400);
    color: white;
}

.cal-step-dot.completed {
    background: var(--pink-100);
    border-color: var(--pink-300);
    color: var(--pink-600);
}

.cal-step-line {
    flex: 1;
    height: 2px;
    background: var(--border);
    max-width: 32px;
}

.cal-wizard-step {
    display: none;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    min-height: 120px;
}

.cal-wizard-step.active {
    display: block;
}

.cal-wizard-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    gap: 0.5rem;
}

.cal-wizard-step-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Object selection dropdown */
#threemf-object-select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border: 1.5px solid var(--border-input);
    border-radius: 10px;
    font-family: 'Space Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-dark);
    background: var(--bg-input);
    transition: all 0.2s ease;
    cursor: pointer;
    appearance: auto;
}

#threemf-object-select:focus {
    outline: none;
    border-color: var(--pink-400);
    box-shadow: 0 0 0 3px rgba(244, 114, 182, 0.2);
}

#threemf-object-select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}