/* ========================================
   Circuit Analyzer - CSS Stylesheet
   ======================================== */

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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-bg: #eef2ff;
    --accent: #06b6d4;
    --accent-dark: #0891b2;
    --success: #10b981;
    --success-bg: #ecfdf5;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --bg: #f8fafc;
    --surface: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 0.2s ease;
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Container === */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* === Header === */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.92);
}

.header .container {
    max-width: 1200px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo i {
    font-size: 1.5rem;
    color: var(--primary);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.version-badge {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 0.15rem 0.5rem;
    border-radius: 99px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}
.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}
.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    color: var(--gray-500);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.btn-remove {
    color: var(--danger);
}
.btn-remove:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.btn-analyze {
    width: 100%;
    justify-content: center;
    font-size: 1.1rem;
    padding: 1rem;
    margin-top: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.btn-analyze:hover {
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

/* === Sections === */
.section {
    display: none;
    animation: fadeIn 0.3s ease;
}
.section.active {
    display: block;
}

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

.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* === Hero Text === */
.hero-text {
    text-align: center;
    margin-bottom: 2rem;
}
.hero-text h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}
.hero-text h2 i {
    color: var(--primary);
}
.hero-text p {
    font-size: 1rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* === Upload Card === */
.upload-card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Drawing Type Selector */
.drawing-type-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-bg), #f0f4ff);
    border-bottom: 1px solid var(--gray-200);
}

.drawing-type-selector label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.drawing-type-selector label i {
    color: var(--primary);
    font-size: 1rem;
}

.drawing-type-selector select {
    flex: 1;
    max-width: 280px;
    padding: 0.6rem 2.2rem 0.6rem 0.9rem;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: 'Noto Sans JP', 'Inter', sans-serif;
    color: var(--gray-800);
    background: var(--surface);
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 12px;
}

.drawing-type-selector select:hover {
    border-color: var(--primary-light);
}

.drawing-type-selector select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.drawing-type-selector select option {
    padding: 0.5rem;
}

.drawing-type-selector select:invalid,
.drawing-type-selector select option[disabled] {
    color: var(--gray-400);
}

.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    margin: 1.5rem;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--gray-50);
    text-align: center;
}
.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background: var(--primary-bg);
}
.upload-area.drag-over {
    transform: scale(1.01);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-light);
    margin-bottom: 1rem;
    transition: transform var(--transition);
}
.upload-area:hover .upload-icon {
    transform: scale(1.1);
}

.upload-area h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.file-formats {
    color: var(--gray-400);
    font-size: 0.8rem;
    margin-top: 0.75rem;
}

/* Uploaded File */
.uploaded-file {
    padding: 1.5rem;
}

.file-preview-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--primary-bg);
    border-radius: var(--radius);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.file-icon {
    font-size: 2rem;
    color: var(--danger);
}

.file-details {
    flex: 1;
}
.file-details h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-800);
}
.file-details p {
    font-size: 0.8rem;
    color: var(--gray-500);
}
.file-pages {
    font-weight: 500;
    color: var(--primary) !important;
}

/* PDF Thumbnails */
.pdf-thumbnails {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.pdf-thumb {
    flex-shrink: 0;
    width: 100px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    background: #fff;
}
.pdf-thumb canvas {
    width: 100%;
    display: block;
}
.pdf-thumb-label {
    font-size: 0.65rem;
    text-align: center;
    padding: 0.2rem;
    background: var(--gray-100);
    color: var(--gray-500);
    font-weight: 500;
}

/* Analyze Button Area */
.analyze-btn-area {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

/* Form */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.4rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: var(--gray-800);
    background: var(--surface);
    transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-with-action {
    display: flex;
    gap: 0.5rem;
}
.input-with-action input {
    flex: 1;
}

.help-text {
    font-size: 0.75rem;
    color: var(--gray-400);
    margin-top: 0.3rem;
}
.help-text a {
    color: var(--primary);
}

/* === How It Works === */
.how-it-works {
    margin-top: 3rem;
    text-align: center;
}
.how-it-works h3 {
    font-size: 1.1rem;
    color: var(--gray-600);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.step-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1rem;
    box-shadow: var(--shadow);
    flex: 1;
    max-width: 220px;
    position: relative;
}

.step-num {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    font-size: 1.75rem;
    color: var(--primary-light);
    margin-bottom: 0.75rem;
}

.step-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.3rem;
}
.step-card p {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.step-arrow {
    color: var(--gray-300);
    font-size: 1.25rem;
}

/* === Loading === */
.loading-card {
    text-align: center;
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    box-shadow: var(--shadow-lg);
    max-width: 560px;
    margin: 0 auto;
}

.loading-animation {
    margin-bottom: 2rem;
}

.circuit-loader {
    position: relative;
    width: 100px;
    height: 100px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--primary-light);
    animation: pulse-expand 2s ease-out infinite;
    opacity: 0;
}
.pulse-ring.delay-1 { animation-delay: 0.5s; }
.pulse-ring.delay-2 { animation-delay: 1s; }

@keyframes pulse-expand {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

.loader-icon {
    font-size: 2.5rem;
    color: var(--primary);
    animation: pulse-glow 1.5s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    from { opacity: 0.6; transform: scale(1); }
    to { opacity: 1; transform: scale(1.1); }
}

.loading-card h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

#loading-status {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 1.5rem;
}

.progress-bar {
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    width: 0%;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
}

.loading-log {
    margin-top: 1.5rem;
    text-align: left;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gray-500);
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.8;
}

.log-entry {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.log-entry .log-icon {
    flex-shrink: 0;
}

/* === Results === */
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}
.results-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-900);
}
.results-header h2 i {
    color: var(--success);
}
.results-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.results-info {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.info-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.75rem;
    background: var(--gray-100);
    border-radius: 99px;
    font-size: 0.8rem;
    color: var(--gray-600);
}
.info-chip i {
    color: var(--gray-400);
}

/* Input PDF Preview in Results */
.input-pdf-preview {
    background: var(--surface);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.input-pdf-preview-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(135deg, var(--primary-bg), #e0e7ff);
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
}

.input-pdf-preview-header i {
    color: var(--primary);
    font-size: 1rem;
}

.input-pdf-preview-body {
    display: flex;
    gap: 1.5rem;
    padding: 1rem 1.25rem;
    align-items: flex-start;
}

.input-pdf-preview-thumb-area {
    flex: 0 0 auto;
}

.input-pdf-preview-pages {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 320px;
}

.input-pdf-page {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.input-pdf-page canvas {
    max-height: 200px;
    width: auto;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    background: #fff;
}

.input-pdf-page-label {
    font-size: 0.7rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* Meta Table Area */
.input-pdf-meta-area {
    flex: 1;
    min-width: 0;
}

.input-pdf-meta-area h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.input-pdf-meta-area h4 i {
    color: var(--primary);
    font-size: 0.9rem;
}

.meta-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.meta-table th,
.meta-table td {
    padding: 0.45rem 0.7rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.meta-table th {
    white-space: nowrap;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-50);
    width: 120px;
    border-right: 1px solid var(--gray-200);
    border-radius: 0;
}

.meta-table td {
    color: var(--gray-800);
    word-break: break-word;
}

.meta-table tr:last-child th,
.meta-table tr:last-child td {
    border-bottom: none;
}

.meta-table tr:hover {
    background: var(--primary-bg);
}

/* Responsive: stack on narrow screens */
@media (max-width: 768px) {
    .input-pdf-preview-body {
        flex-direction: column;
    }
    .input-pdf-preview-pages {
        max-width: 100%;
    }
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: 2px;
    background: var(--gray-200);
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 2px;
}

.tab-btn {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    border-radius: calc(var(--radius) - 2px);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}
.tab-btn:hover {
    color: var(--gray-700);
}
.tab-btn.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    display: none;
    background: var(--surface);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.tab-content.active {
    display: block;
}

/* Markdown Preview */
.markdown-preview {
    padding: 2rem;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--gray-800);
    max-height: 80vh;
    overflow-y: auto;
}

.markdown-preview h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-bg);
}
.markdown-preview h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 1.5rem 0 0.75rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--gray-200);
}
.markdown-preview h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 1.25rem 0 0.5rem;
}
.markdown-preview h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 1rem 0 0.4rem;
}

.markdown-preview p {
    margin-bottom: 0.75rem;
}

.markdown-preview ul, .markdown-preview ol {
    margin: 0.5rem 0 1rem 1.5rem;
}
.markdown-preview li {
    margin-bottom: 0.3rem;
}

.markdown-preview strong {
    color: var(--gray-900);
}

.markdown-preview code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--gray-100);
    padding: 0.15em 0.35em;
    border-radius: 4px;
    color: var(--primary-dark);
}

.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.85rem;
}
.markdown-preview thead {
    background: var(--gray-50);
}
.markdown-preview th {
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    padding: 0.6rem 0.75rem;
    border-bottom: 2px solid var(--gray-200);
}
.markdown-preview td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-600);
}
.markdown-preview tr:hover td {
    background: var(--gray-50);
}

.markdown-preview hr {
    border: none;
    border-top: 1px solid var(--gray-200);
    margin: 1.5rem 0;
}

.markdown-preview blockquote {
    border-left: 3px solid var(--primary-light);
    padding-left: 1rem;
    color: var(--gray-600);
    margin: 1rem 0;
}

/* Raw text */
.raw-text {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gray-700);
    background: var(--gray-50);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 80vh;
    overflow-y: auto;
    line-height: 1.6;
    margin: 0;
}

/* === Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal {
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 480px;
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}
.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.modal-header h3 i {
    color: var(--primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--gray-400);
    font-size: 0.8rem;
    border-top: 1px solid var(--gray-100);
    margin-top: auto;
}

/* === Toast === */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gray-800);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 99px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    transition: transform 0.3s ease;
    pointer-events: none;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .header .container {
        height: 52px;
    }
    
    .logo h1 {
        font-size: 1.05rem;
    }
    
    .nav-label {
        display: none;
    }
    
    .hero-text h2 {
        font-size: 1.3rem;
    }
    
    .upload-area {
        padding: 2rem 1.5rem;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .step-card {
        max-width: 100%;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .results-actions {
        width: 100%;
    }
    
    .results-actions .btn {
        flex: 1;
        justify-content: center;
    }
    
    .markdown-preview {
        padding: 1.25rem;
    }
    
    .raw-text {
        padding: 1rem;
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .hero-text h2 {
        font-size: 1.15rem;
    }
    
    .btn-large {
        padding: 0.6rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .results-info {
        flex-direction: column;
    }
    
    .info-chip {
        width: 100%;
        justify-content: center;
    }
}