/* ============================================================
   Tax Statement Barcode Extractor — Premium Dark Mode Styles
   ============================================================ */

/* --- Design Tokens --- */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(99, 102, 241, 0.4);

    --text-primary: #e8e8ed;
    --text-secondary: #8b8b9e;
    --text-muted: #5a5a6e;

    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-glow: rgba(129, 140, 248, 0.15);
    --success: #34d399;
    --success-glow: rgba(52, 211, 153, 0.15);
    --error: #f87171;
    --error-glow: rgba(248, 113, 113, 0.15);
    --warning: #fbbf24;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--accent-glow);

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* --- Layout --- */
.app-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* --- Header --- */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-subtle);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.badge {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--success);
    background: var(--success-glow);
    padding: 6px 12px;
    border-radius: 100px;
    border: 1px solid rgba(52, 211, 153, 0.2);
}

/* --- Upload Section --- */
.drop-zone {
    position: relative;
    border: 2px dashed var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 64px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--bg-card);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.drop-zone.drag-over {
    animation: pulse-border 1.5s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% { border-color: var(--accent); }
    50% { border-color: var(--accent-hover); }
}

.upload-icon {
    width: 56px;
    height: 56px;
    color: var(--text-muted);
    margin-bottom: 20px;
    transition: color var(--transition-base);
}

.drop-zone:hover .upload-icon {
    color: var(--accent);
}

.drop-text {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.drop-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.file-types {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 4px 10px;
    border-radius: 100px;
    border: 1px solid var(--border-subtle);
}

/* --- Loading Section --- */
.loading-section {
    text-align: center;
    padding: 80px 0;
}

.spinner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.loading-subtext {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
}

/* --- Error Section --- */
.error-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 48px 32px;
    background: var(--error-glow);
    border: 1px solid rgba(248, 113, 113, 0.2);
    border-radius: var(--radius-lg);
    text-align: center;
}

.error-icon {
    width: 40px;
    height: 40px;
    color: var(--error);
}

.error-message {
    font-size: 0.95rem;
    color: var(--text-primary);
    max-width: 420px;
    line-height: 1.6;
}

/* --- Results Section --- */
.results-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.results-title {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 4px;
}

.results-summary {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.results-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* --- Result Cards --- */
.results-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.page-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.page-card:hover {
    border-color: var(--border-accent);
}

.page-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-subtle);
}

.page-badge {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 3px 8px;
    border-radius: 4px;
}

.page-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.barcode-list {
    list-style: none;
}

.barcode-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-fast);
}

.barcode-item:last-child {
    border-bottom: none;
}

.barcode-item:hover {
    background: var(--bg-card-hover);
}

.barcode-text {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
    word-break: break-all;
    flex: 1;
    line-height: 1.5;
}

.copy-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-family);
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 5px 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.copy-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-glow);
}

.copy-btn.copied {
    color: var(--success);
    border-color: var(--success);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-family);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 9px 16px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    color: #fff;
    background: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* --- JSON Details --- */
.json-details {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.json-summary {
    padding: 14px 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
    user-select: none;
}

.json-summary:hover {
    color: var(--text-primary);
}

.json-output {
    padding: 18px;
    background: var(--bg-secondary);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    border-top: 1px solid var(--border-subtle);
    max-height: 400px;
}

/* --- Utilities --- */
.hidden {
    display: none !important;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    .app-container {
        padding: 20px 16px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .results-header {
        flex-direction: column;
    }

    .results-actions {
        width: 100%;
    }

    .results-actions .btn {
        flex: 1;
        justify-content: center;
    }

    .drop-zone {
        padding: 48px 20px;
    }
}