/* GitHub-style Custom CSS */
:root {
    --color-canvas-default: #ffffff;
    --color-canvas-subtle: #f6f8fa;
    --color-border-default: #d0d7de;
    --color-border-muted: #d1d9e0;
    --color-neutral-emphasis-plus: #656d76;
    --color-fg-default: #1f2328;
    --color-fg-muted: #656d76;
    --color-fg-subtle: #6e7781;
    --color-accent-fg: #0969da;
    --color-accent-emphasis: #0969da;
    --color-success-fg: #1a7f37;
    --color-danger-fg: #d1242f;
    --color-attention-fg: #9a6700;
    --color-btn-bg: #f6f8fa;
    --color-btn-border: #d0d7de;
    --color-btn-text: #24292f;
    --color-btn-hover-bg: #f3f4f6;
    --color-btn-primary-bg: #2da44e;
    --color-btn-primary-text: #ffffff;
    --color-btn-primary-hover-bg: #2c974b;
    --color-header-bg: #24292f;
    --color-header-text: #f0f6fc;
    --color-header-divider: #373e47;
}

/* Base styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: var(--color-fg-default);
    background-color: var(--color-canvas-default);
    line-height: 1.5;
}

/* Links */
a {
    color: var(--color-accent-fg);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 16px;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid;
    border-radius: 6px;
    transition: 80ms cubic-bezier(0.33, 1, 0.68, 1);
    transition-property: color, background-color, box-shadow, border-color;
    text-decoration: none;
}

.btn-default {
    color: var(--color-btn-text);
    background-color: var(--color-btn-bg);
    border-color: var(--color-btn-border);
    box-shadow: 0 1px 0 rgba(27, 31, 36, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-default:hover {
    background-color: var(--color-btn-hover-bg);
    border-color: var(--color-btn-border);
    text-decoration: none;
}

.btn-primary {
    color: #ffffff;
    background-color: #24292f;
    border-color: rgba(27, 31, 36, 0.15);
    box-shadow: 0 1px 0 rgba(27, 31, 36, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.btn-primary:hover {
    background-color: #1f2328;
    text-decoration: none;
}

/* Cards */
.card {
    background-color: var(--color-canvas-default);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
    overflow: hidden;
}

.card-hover:hover {
    box-shadow: 0 8px 24px rgba(149, 157, 165, 0.2);
    border-color: var(--color-border-muted);
}

/* Borders */
.border {
    border: 1px solid var(--color-border-default);
}

.border-top {
    border-top: 1px solid var(--color-border-default);
}

.border-bottom {
    border-bottom: 1px solid var(--color-border-default);
}

/* Text colors */
.text-muted {
    color: var(--color-fg-muted) !important;
}

.text-subtle {
    color: var(--color-fg-subtle) !important;
}

.text-success {
    color: var(--color-success-fg) !important;
}

.text-danger {
    color: var(--color-danger-fg) !important;
}

.text-attention {
    color: var(--color-attention-fg) !important;
}

/* Backgrounds */
.bg-subtle {
    background-color: var(--color-canvas-subtle) !important;
}

/* Upload area styling */
.upload-area {
    border: 2px dashed var(--color-border-default);
    border-radius: 6px;
    background-color: var(--color-canvas-subtle);
    transition: all 0.2s ease;
}

.upload-area:hover {
    border-color: var(--color-accent-fg);
    background-color: var(--color-canvas-default);
}

.upload-area.dragover {
    border-color: var(--color-accent-fg);
    background-color: var(--color-canvas-default);
    box-shadow: inset 0 0 10px rgba(9, 105, 218, 0.1);
}

/* Progress bar */
.progress-bar {
    background-color: var(--color-canvas-subtle);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    background-color: var(--color-accent-fg);
    height: 4px;
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* Code and prompt styling */
.prompt-container {
    background-color: var(--color-canvas-subtle);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

/* Form inputs */
.form-input {
    padding: 5px 12px;
    font-size: 14px;
    line-height: 20px;
    color: var(--color-fg-default);
    background-color: var(--color-canvas-default);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
    outline: none;
    box-shadow: inset 0 1px 0 rgba(27, 31, 36, 0.075);
}

.form-input:focus {
    border-color: var(--color-accent-fg);
    box-shadow: inset 0 1px 0 rgba(27, 31, 36, 0.075), 0 0 0 3px rgba(9, 105, 218, 0.3);
}

/* Tags and labels */
.label {
    display: inline-block;
    padding: 0 7px;
    font-size: 12px;
    font-weight: 500;
    line-height: 18px;
    border-radius: 2em;
    background-color: var(--color-neutral-emphasis-plus);
    color: var(--color-canvas-default);
}

.label-primary {
    background-color: #24292f;
}

.label-success {
    background-color: var(--color-success-fg);
}

/* Gallery grid improvements */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

/* Statistics and counters */
.counter {
    display: inline-flex;
    align-items: center;
    padding: 2px 5px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1;
    color: var(--color-fg-default);
    background-color: var(--color-neutral-emphasis-plus);
    border-radius: 2em;
    min-width: 20px;
    justify-content: center;
}

/* Navigation improvements */
.nav-link {
    color: var(--color-fg-default);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-fg-default);
    background-color: var(--color-canvas-subtle);
    text-decoration: none;
}

.nav-link.active {
    color: var(--color-accent-fg);
    background-color: var(--color-canvas-subtle);
}

/* Footer improvements */
.footer-link {
    color: var(--color-fg-muted);
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--color-accent-fg);
    text-decoration: none;
}

/* Responsive utilities */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 12px;
    }
}

/* Utilities for spacing and layout */
.p-2 { padding: 8px; }
.p-3 { padding: 16px; }
.p-4 { padding: 24px; }
.m-2 { margin: 8px; }
.m-3 { margin: 16px; }
.m-4 { margin: 24px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

/* Custom animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* Search highlighting */
.search-highlight {
    background-color: #fff3cd;
    padding: 0 2px;
    border-radius: 2px;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border-default);
    border-radius: 50%;
    border-top-color: var(--color-accent-fg);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Tabs */
.tab-button {
    color: #656d76;
    border-bottom-color: transparent;
}

.tab-button:hover {
    color: #24292f;
    border-bottom-color: #d0d7de;
}

.tab-button.active {
    color: #24292f;
    border-bottom-color: #24292f;
    border-bottom-width: 2px;
}

.tab-content {
    animation: fadeIn 0.3s ease-in-out;
}

/* Upload area states */
.upload-area.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Featured Prompts Section */
.prompt-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.prompt-preview-container {
    max-height: 200px;
    overflow-y: auto;
}

.prompt-preview-container::-webkit-scrollbar {
    width: 4px;
}

.prompt-preview-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 2px;
}

.prompt-preview-container::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 2px;
}

.prompt-preview-container::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Button styles for featured prompts */
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 12px;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    color: var(--color-btn-text);
    background-color: #ffffff;
    border: 1px solid var(--color-btn-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background-color: var(--color-btn-hover-bg);
    border-color: #24292f;
    text-decoration: none;
}

/* Aspect ratio utilities */
.aspect-square {
    position: relative;
    padding-bottom: 100%; /* 1:1 */
}

.aspect-square img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}