/* Multi-Layer Text to Image Generator - Column Layout Styles */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --canvas-border: #e5e7eb;
    --canvas-bg: #f9fafb;
    --layer-border: #d1d5db;
    --layer-active-bg: #eff6ff;
    --workspace-gap: 2rem;
}

/* Section Titles */
.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

/* Workspace - Two Column Layout */
.workspace {
    display: grid;
    grid-template-columns: 450px 1fr;
    gap: var(--workspace-gap);
    align-items: start;
    margin-top: 2rem;
}

/* Preview Column (Right) */
.workspace__preview {
    position: sticky;
    top: 1rem;
    height: fit-content;
}

.preview-panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
}

.preview-panel__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.canvas-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    background: var(--canvas-bg);
    border: 2px dashed var(--canvas-border);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

#main-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border-radius: var(--border-radius);
}

.canvas-actions {
    display: flex;
    justify-content: center;
}

/* Controls Column (Left) */
.workspace__controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Settings Section */
.settings-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 0;
}

/* Collapsible Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    margin: 0;
}

.collapsible-header {
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.collapsible-header:hover {
    background: rgba(59, 130, 246, 0.05);
}

.collapsible-header .section-title {
    margin: 0;
}

.collapse-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    border-radius: var(--border-radius);
}

.collapse-toggle:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
}

.collapse-icon {
    transition: transform 0.3s;
}

.settings-section.collapsed .collapse-icon {
    transform: rotate(-90deg);
}

/* Collapsible Content */
.collapsible-content {
    max-height: 2000px;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.settings-section.collapsed .collapsible-content {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    transition: max-height 0.3s ease-in, padding 0.3s ease-in;
}

.settings-group {
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.settings-group:last-child {
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: none;
}

.settings-group__title {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

/* Layers Section */
.layers-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
}

.layers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.layer-counter {
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.5rem 0.875rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--border-radius);
}

.layers-container {
    margin-bottom: 1rem;
}

/* Layer Item (Accordion) */
.layer-item {
    background: var(--color-bg-primary);
    border: 2px solid var(--layer-border);
    border-radius: var(--border-radius);
    margin-bottom: 0.875rem;
    transition: all 0.2s;
}

.layer-item.active {
    border-color: var(--color-primary);
    background: var(--layer-active-bg);
}

.layer-item:last-child {
    margin-bottom: 0;
}

.layer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 1.25rem;
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.layer-header:hover {
    background: rgba(59, 130, 246, 0.05);
}

.layer-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.layer-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50%;
    flex-shrink: 0;
}

.layer-title {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-primary);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.layer-toggle {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: transform 0.3s;
}

.layer-item.expanded .layer-toggle {
    transform: rotate(180deg);
}

/* Layer Content */
.layer-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.layer-item.expanded .layer-content {
    max-height: 2000px;
    transition: max-height 0.5s ease-in;
}

.layer-content-inner {
    padding: 0 1.25rem 1.25rem 1.25rem;
}

/* Layer Controls */
.layer-controls {
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.875rem;
    background-color: var(--color-bg-primary);
    transition: border-color 0.2s;
}

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

.form-input--small {
    width: 95px;
    text-transform: uppercase;
}

.form-textarea {
    resize: vertical;
    min-height: 60px;
}

/* Form Rows */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
}

/* Range Input */
.form-range {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--color-border);
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: background 0.2s;
}

.form-range::-webkit-slider-thumb:hover {
    background: var(--color-primary-dark);
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    transition: background 0.2s;
}

.form-range::-moz-range-thumb:hover {
    background: var(--color-primary-dark);
}

/* Color Input */
.color-input-wrapper {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.form-color {
    width: 60px;
    height: 38px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    background: none;
}

.form-color::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.form-color::-webkit-color-swatch {
    border: none;
    border-radius: calc(var(--border-radius) - 2px);
}

.form-color::-moz-color-swatch {
    border: none;
    border-radius: calc(var(--border-radius) - 2px);
}

/* Checkbox */
.form-checkbox {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 0.5rem;
    cursor: pointer;
}

.form-checkbox:last-child {
    margin-bottom: 0;
}

/* Alignment Buttons */
.align-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-align {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.625rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-primary);
    color: var(--color-text-secondary);
    font-size: 0.6875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-align:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-align.active {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
    color: white;
}

.btn-align svg {
    width: 14px;
    height: 14px;
}

/* Layer Actions */
.layer-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-primary);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-icon:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-icon.btn-icon--danger:hover {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.btn-icon svg {
    width: 15px;
    height: 15px;
}

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

.btn-icon:disabled:hover {
    border-color: var(--color-border);
    color: var(--color-text-secondary);
}

/* Buttons */
.btn--full {
    width: 100%;
}

.btn--large {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* Effect Options (collapsible) */
.effect-options {
    margin-top: 0.75rem;
    padding: 0.875rem;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--border-radius);
}

/* Info Section Spacing */
.info-section {
    margin-top: 3rem;
}

/* Responsive Design */

/* Large Desktops (>1400px) - More room for preview */
@media (min-width: 1400px) {
    .workspace {
        grid-template-columns: 480px 1fr;
    }
}

/* Desktop (1024px - 1200px) - Narrower sidebar */
@media (max-width: 1200px) {
    .workspace {
        grid-template-columns: 420px 1fr;
    }
}

/* Tablet (768px - 1024px) - Stack vertically */
@media (max-width: 1024px) {
    .workspace {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .workspace__preview {
        position: static;
        order: 1;
    }

    .workspace__controls {
        order: 2;
    }

    .preview-panel {
        padding: 1.25rem;
    }

    .settings-section,
    .layers-section {
        padding: 1.25rem;
    }
}

/* Mobile (< 768px) - Compact layout */
@media (max-width: 768px) {
    :root {
        --workspace-gap: 1rem;
    }

    .workspace {
        gap: 1rem;
    }

    .section-title {
        font-size: 1.125rem;
    }

    .preview-panel,
    .layers-section {
        padding: 1rem;
    }

    .section-header {
        padding: 1rem 1rem;
    }

    .collapsible-content {
        padding: 0 1rem 1rem 1rem;
    }

    .collapse-toggle {
        width: 28px;
        height: 28px;
    }

    .canvas-wrapper {
        min-height: 300px;
        padding: 0.75rem;
    }

    .settings-group {
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }

    .settings-group__title {
        font-size: 0.875rem;
    }

    .layer-header {
        padding: 0.75rem 1rem;
    }

    .layer-content-inner {
        padding: 0 1rem 1rem 1rem;
    }

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

    .layer-actions {
        grid-template-columns: 1fr;
    }

    .layers-header {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .btn--large {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1.25rem;
        font-size: 0.9375rem;
    }

    .form-label {
        font-size: 0.75rem;
    }

    .form-input,
    .form-select,
    .form-textarea {
        font-size: 0.8125rem;
        padding: 0.5rem 0.625rem;
    }

    .form-input--small {
        width: 85px;
        font-size: 0.75rem;
    }

    .color-input-wrapper {
        flex-wrap: wrap;
    }

    .form-color {
        height: 36px;
    }

    .btn-align {
        font-size: 0.625rem;
        padding: 0.5rem 0.375rem;
    }

    .btn-align svg {
        width: 12px;
        height: 12px;
    }

    .btn-icon {
        font-size: 0.75rem;
        padding: 0.5rem 0.625rem;
    }

    .btn-icon svg {
        width: 14px;
        height: 14px;
    }
}

/* Extra Small Mobile (< 480px) - Ultra compact */
@media (max-width: 480px) {
    .preview-panel,
    .layers-section {
        padding: 0.875rem;
    }

    .section-header {
        padding: 0.875rem;
    }

    .collapsible-content {
        padding: 0 0.875rem 0.875rem 0.875rem;
    }

    .canvas-wrapper {
        min-height: 250px;
        padding: 0.5rem;
    }

    .layer-number {
        width: 24px;
        height: 24px;
        font-size: 0.6875rem;
    }

    .layer-title {
        font-size: 0.875rem;
    }

    .layer-toggle {
        width: 18px;
        height: 18px;
    }
}


/* ========== Dark Mode Support ========== */
[data-theme="dark"] {
  --color-gray-50: #0F172A;
  --color-gray-100: #1E293B;
  --color-gray-200: #334155;
  --color-gray-300: #475569;
  --color-gray-400: #64748B;
  --color-gray-500: #94A3B8;
  --color-gray-600: #CBD5E1;
  --color-gray-700: #E2E8F0;
  --color-gray-800: #F1F5F9;
  --color-gray-900: #F8FAFC;
  
  --color-bg: #1E293B;
  --color-bg-alt: #0F172A;
  --color-border: #334155;
  --color-text: #F1F5F9;
  --color-text-light: #CBD5E1;
}

/* Theme Toggle Button Styles */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border, #e5e7eb);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  border-color: var(--color-accent-amber, #FFC53A);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  color: #475569;
}

.theme-toggle .hidden {
  display: none;
}

[data-theme="dark"] .theme-toggle {
  background: rgba(30, 41, 59, 0.8);
  border-color: #475569;
}

[data-theme="dark"] .theme-toggle svg {
  color: #E2E8F0;
}

/* Dark mode body and text colors */
[data-theme="dark"] body {
  background: #0F172A;
  color: #F1F5F9;
}

[data-theme="dark"] .header {
  background: #1E293B;
  border-bottom-color: #334155;
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
}

[data-theme="dark"] .hero__title,
[data-theme="dark"] .content-section__title,
[data-theme="dark"] h1, 
[data-theme="dark"] h2, 
[data-theme="dark"] h3 {
  color: #F8FAFC;
}

[data-theme="dark"] .hero__subtitle,
[data-theme="dark"] p {
  color: #CBD5E1;
}

[data-theme="dark"] .content-section {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] .site-footer {
  background: #0F172A;
  border-top-color: #334155;
}

[data-theme="dark"] .footer-section__title {
  color: #F8FAFC;
}

[data-theme="dark"] .footer-links a {
  color: #CBD5E1;
}

[data-theme="dark"] .footer-links a:hover {
  color: #FAFF81;
}

[data-theme="dark"] .table-of-contents {
  background: rgba(30, 41, 59, 0.6);
  border-color: #334155;
}

[data-theme="dark"] .toc-title {
  color: #F8FAFC;
}

[data-theme="dark"] .toc-item a {
  color: #CBD5E1;
}

[data-theme="dark"] .toc-item a:hover {
  background: rgba(250, 255, 129, 0.1);
  color: #FAFF81;
}

/* Tool-specific dark mode */
[data-theme="dark"] .tool-container,
[data-theme="dark"] .checker-container,
[data-theme="dark"] .generator-container {
  background: #1E293B;
  border-color: #334155;
}

[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  background: #0F172A;
  border-color: #334155;
  color: #F1F5F9;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
  border-color: #FAFF81;
  box-shadow: 0 0 0 3px rgba(250, 255, 129, 0.1);
}

[data-theme="dark"] .btn,
[data-theme="dark"] .check-btn,
[data-theme="dark"] .generate-btn {
  background: linear-gradient(135deg, #334155 0%, #1E293B 100%);
  color: #FAFF81;
  border-color: #475569;
}

[data-theme="dark"] .btn:hover,
[data-theme="dark"] .check-btn:hover,
[data-theme="dark"] .generate-btn:hover {
  background: linear-gradient(135deg, #475569 0%, #334155 100%);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .faq-section {
  background: #0F172A;
}

[data-theme="dark"] .faq-question {
  background: #1E293B;
  color: #F8FAFC;
  border-color: #334155;
}

[data-theme="dark"] .faq-question:hover {
  background: #334155;
}

[data-theme="dark"] .faq-answer {
  background: #1E293B;
  border-color: #334155;
  color: #CBD5E1;
}

[data-theme="dark"] code,
[data-theme="dark"] pre {
  background: #0F172A;
  color: #FAFF81;
  border-color: #334155;
}

[data-theme="dark"] .error-card,
[data-theme="dark"] .example-card {
  background: #1E293B;
  border-color: #334155;
}