/**
 * Timbre Expert AI - Main Stylesheet
 * Professional design for philately/stamp collecting
 */

/* ===== VARIABLES ===== */
:root {
    /* Main colors - elegant blue tones */
    --primary: #2C5282;
    --primary-dark: #1A365D;
    --primary-light: #4299E1;

    --accent: #D69E2E;
    --accent-dark: #B7791F;
    --accent-light: #ECC94B;

    /* Secondary colors */
    --secondary: #553C9A;
    --secondary-light: #805AD5;

    /* Backgrounds - clean and professional */
    --bg-light: #F7FAFC;
    --bg-white: #FFFFFF;
    --bg-card: #FFFFFF;
    --bg-card-hover: #EDF2F7;

    /* Text */
    --text-primary: #1A202C;
    --text-secondary: #4A5568;
    --text-muted: #718096;

    /* Borders */
    --border: #E2E8F0;
    --border-dark: #CBD5E0;

    /* States */
    --success: #38A169;
    --warning: #DD6B20;
    --error: #E53E3E;
    --info: #3182CE;

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Radii */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-light);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* ===== LAYOUT ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.main-content {
    flex: 1;
}

/* ===== HEADER ===== */
.site-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-dark);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo:hover {
    color: var(--primary);
}

.logo-icon {
    font-size: 1.8rem;
}

.main-nav {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ===== HERO SECTION ===== */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    color: white;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-xl);
    border: 2px dashed rgba(255,255,255,0.3);
}

.stamp-icon {
    font-size: 8rem;
    opacity: 0.8;
}

/* ===== PAGE HERO ===== */
.page-hero {
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    text-align: center;
    color: white;
}

.page-hero h1 {
    margin-bottom: var(--spacing-md);
    color: white;
}

.page-hero p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--primary-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: var(--spacing-md) auto 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== SPECIALTIES SECTION ===== */
.specialties {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.specialties-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.specialty-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.specialty-item h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.specialty-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.specialties-regions {
    text-align: center;
}

.specialties-regions h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary-dark);
}

.regions-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
}

.regions-list span {
    background: var(--bg-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== CTA SECTION ===== */
.cta-section {
    padding: var(--spacing-3xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
}

.cta-content h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--spacing-xl);
}

/* ===== TRUST SECTION ===== */
.trust-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
}

.trust-content {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
}

.trust-item {
    text-align: center;
}

.trust-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.trust-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-light);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.85rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

/* ===== SUBMIT PAGE ===== */
.submit-section {
    padding: var(--spacing-2xl) 0;
}

.submit-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-2xl);
}

.submit-form-container {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: var(--spacing-lg);
}

.form-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.form-help {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* Upload Area */
.upload-area {
    display: block;
    border: 2px dashed var(--border-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    background: var(--bg-light);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(44, 82, 130, 0.05);
}

.upload-area.has-files {
    border-style: solid;
    border-color: var(--success);
    background: rgba(56, 161, 105, 0.05);
}

.upload-area input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.upload-text {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.upload-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.preview-item {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.preview-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.preview-name {
    display: block;
    padding: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Submit Sidebar */
.submit-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.sidebar-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.sidebar-card h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.sidebar-card ul {
    list-style: none;
}

.sidebar-card li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.sidebar-card li::before {
    content: '•';
    color: var(--accent);
    margin-right: var(--spacing-sm);
}

.sidebar-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Form Actions */
.form-actions {
    text-align: center;
}

.form-disclaimer {
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== RESULT PAGE ===== */
.result-hero {
    padding-bottom: var(--spacing-xl);
}

.result-header {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-ref {
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.result-section {
    padding: var(--spacing-2xl) 0;
}

.result-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

/* Result Images */
.result-images {
    position: sticky;
    top: 90px;
}

.main-image {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.main-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: contain;
    background: var(--bg-light);
}

.thumbnail-row {
    display: flex;
    gap: var(--spacing-sm);
}

.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.thumbnail.active,
.thumbnail:hover {
    border-color: var(--primary);
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Result Analysis */
.result-analysis {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.result-summary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    color: white;
    box-shadow: var(--shadow-lg);
}

.result-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.result-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.result-card.full-width {
    grid-column: 1 / -1;
}

/* Identification Grid */
.id-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.id-item label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.id-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.id-value.primary {
    color: var(--primary);
    font-size: 1.3rem;
}

/* Materials & Lists */
.materials-list,
.highlights-list {
    list-style: none;
}

.materials-list li,
.highlights-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.materials-list li:last-child,
.highlights-list li:last-child {
    border-bottom: none;
}

/* Evaluation */
.eval-item {
    margin-bottom: var(--spacing-lg);
}

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

.eval-item label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.auth-status {
    font-weight: 600;
    color: var(--primary);
}

.auth-indices {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-lg);
}

.auth-indices li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* Confidence Bar */
.confidence-bar {
    height: 8px;
    background: var(--bg-light);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.confidence-fill {
    height: 100%;
    transition: width 0.5s ease;
}

.confidence-fill.success { background: var(--success); }
.confidence-fill.warning { background: var(--warning); }
.confidence-fill.danger { background: var(--error); }

.confidence-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Value Card */
.value-card {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
    border-color: var(--accent);
}

.estimated-value {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--accent-dark);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.value-disclaimer {
    text-align: center;
    color: var(--text-muted);
}

/* Recommendations */
.recommendations {
    background: rgba(44, 82, 130, 0.05);
    border-color: var(--primary);
}

/* Similar Products */
.similar-products-section {
    margin-bottom: var(--spacing-2xl);
}

.similar-products-section h2 {
    margin-bottom: var(--spacing-xl);
    color: var(--primary-dark);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    text-decoration: none;
    color: var(--text-primary);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
}

.product-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--bg-light);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-image .no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.product-info {
    padding: var(--spacing-md);
}

.product-info h4 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.product-price {
    color: var(--accent-dark);
    font-weight: 600;
}

/* Result Actions */
.result-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.result-disclaimer {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== CONTACT PAGE ===== */
.contact-section {
    padding: var(--spacing-2xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-intro {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.contact-details {
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-item h4 {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-xs);
}

.services-list h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
}

.services-list ul {
    list-style: none;
}

.services-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.contact-form-container {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.contact-form-container h3 {
    margin-bottom: var(--spacing-xl);
    color: var(--primary-dark);
}

.form-note {
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

/* ===== ABOUT PAGE ===== */
.about-section {
    padding: var(--spacing-2xl) 0;
}

.about-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.about-intro h2 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
}

.about-intro p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.about-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.about-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.about-card p {
    color: var(--text-secondary);
}

.about-expertise {
    margin-bottom: var(--spacing-3xl);
}

.about-expertise h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary-dark);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.expertise-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.expertise-item h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.expertise-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.about-cta {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.about-cta h2 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
}

.about-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ===== ALERTS ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid;
}

.alert-success {
    background: rgba(56, 161, 105, 0.1);
    border-color: var(--success);
    color: #276749;
}

.alert-error {
    background: rgba(229, 62, 62, 0.1);
    border-color: var(--error);
    color: #c53030;
}

.alert-warning {
    background: rgba(221, 107, 32, 0.1);
    border-color: var(--warning);
    color: #c05621;
}

/* ===== FOOTER ===== */
.site-footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.9);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-contact p {
    margin-bottom: var(--spacing-sm);
}

.footer-contact a {
    color: rgba(255,255,255,0.7);
}

.footer-contact a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        display: none;
    }

    .features-grid,
    .specialties-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .submit-wrapper {
        grid-template-columns: 1fr;
    }

    .submit-sidebar {
        display: none;
    }

    .result-layout {
        grid-template-columns: 1fr;
    }

    .result-images {
        position: static;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }

    .menu-open .main-nav {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .features-grid,
    .specialties-grid {
        grid-template-columns: 1fr;
    }

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

    .preview-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .id-grid {
        grid-template-columns: 1fr;
    }

    .trust-content {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .result-actions {
        flex-direction: column;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}