* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Modern B2B Color Palette */
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #6366F1;
    --secondary-color: #8B5CF6;
    --accent-color: #06B6D4;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --unknown-color: #6B7280;
    
    /* Neutral Colors */
    --bg-color: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 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;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

body {
    font-family: var(--font-family);
    background: var(--bg-secondary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header & Navigation */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    height: 60px;
    gap: 0.75rem;
}

.logo-image {
    height: 60px;
    width: auto;
    display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: #5842ff;
    white-space: nowrap;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color 0.2s;
}

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

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

/* User Menu */
.user-menu {
    position: relative;
}

/* Hide login button by default - will be shown by JavaScript if user is not logged in */
#loginButton:not(.visible) {
    display: none !important;
}

#loginButton.visible {
    display: block;
}

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

.user-menu-button:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.user-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
}

.user-menu-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.user-menu-badge.premium {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

.user-menu-badge.free {
    background: var(--border-color);
    color: var(--text-secondary);
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    overflow: hidden;
    z-index: 1001;
    animation: dropdownSlide 0.2s ease;
}

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

.user-menu-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: background 0.2s;
}

.user-menu-item:hover {
    background: var(--bg-secondary);
}

.user-menu-item.user-menu-info {
    cursor: default;
    padding: 1rem;
}

.user-menu-item.user-menu-info:hover {
    background: transparent;
}

.user-menu-username {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: var(--font-size-base);
}

.user-menu-email {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.user-menu-subscription {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.user-menu-subscription.premium {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary-color);
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.user-menu-subscription.free {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.user-menu-scans {
    margin-top: 0.75rem;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.user-menu-scans .scans-progress {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 9999px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.user-menu-scans .scans-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transition: width 0.3s;
    border-radius: 9999px;
}

.user-menu-scans .scans-progress-fill.warning {
    background: var(--warning-color);
}

.user-menu-scans .scans-progress-fill.danger {
    background: var(--danger-color);
}

.user-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem;
}

.container.centered {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: calc(100vh - 80px);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-3xl) 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero .subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

/* Scan Form */
.scan-form {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.input-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

#urlInput {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all 0.2s;
    font-family: var(--font-family);
    background: var(--bg-color);
}

#urlInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

#scanButton {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

#scanButton:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

#scanButton:active:not(:disabled) {
    transform: translateY(0);
}

#scanButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.options {
    display: flex;
    gap: var(--spacing-lg);
}

.options label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.options input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* Results */
.results {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-2xl);
}

.hidden {
    display: none !important;
}

/* Suitability Badge */
.suitability-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 2px solid var(--border-light);
}

.suitability-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.badge-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.badge-icon.suitable {
    background: linear-gradient(135deg, var(--success-color), #34D399);
}

.badge-icon.caution {
    background: linear-gradient(135deg, var(--warning-color), #FBBF24);
}

.badge-icon.not_suitable {
    background: linear-gradient(135deg, var(--danger-color), #F87171);
}

.badge-icon.unknown {
    background: linear-gradient(135deg, var(--unknown-color), #9CA3AF);
}

.badge-content h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: 0.25rem;
    text-transform: capitalize;
    font-weight: 700;
    color: var(--text-primary);
}

.badge-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.score-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.score-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: help;
    font-weight: 500;
}

.tooltip-icon {
    font-size: var(--font-size-xs);
    opacity: 0.7;
    transition: opacity 0.2s;
}

.score-label:hover .tooltip-icon {
    opacity: 1;
}

.tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 0.5rem;
    background-color: #1F2937;
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    width: 320px;
    max-width: 90vw;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #1F2937;
}

.score-label:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

.tooltip strong {
    color: white;
    display: block;
    margin-bottom: 0.375rem;
}

.score-value {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.score-bar {
    width: 100%;
    height: 12px;
    background: var(--border-color);
    border-radius: 9999px;
    overflow: hidden;
}

.score-fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease, background 0.3s;
}

/* Alerts */
.alerts-section {
    margin-bottom: var(--spacing-2xl);
}

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-left: 4px solid;
}

.alert.warning {
    background: #FEF3C7;
    color: #92400E;
    border-left-color: var(--warning-color);
}

.alert.error {
    background: #FEE2E2;
    color: #991B1B;
    border-left-color: var(--danger-color);
}

/* Charts */
.charts-section {
    margin-bottom: var(--spacing-2xl);
}

.chart-container {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    height: 300px;
    border: 1px solid var(--border-color);
}

/* Check Cards */
.checks-section h3 {
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.check-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.check-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.check-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.check-header h4 {
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 600;
    color: var(--text-primary);
}

.check-status {
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.check-status.pass {
    background: #D1FAE5;
    color: #065F46;
}

.check-status.warning {
    background: #FEF3C7;
    color: #92400E;
}

.check-status.fail {
    background: #FEE2E2;
    color: #991B1B;
}

.check-status.unknown {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.check-content {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

.check-content ul {
    list-style: none;
    padding-left: 0;
}

.check-content li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

.check-content li:last-child {
    border-bottom: none;
}

.check-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* SEO Summary */
.seo-summary {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.seo-score-bar {
    width: 100%;
    height: 20px;
    background: var(--border-color);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.seo-score-fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease, background 0.3s;
    background: linear-gradient(90deg, var(--success-color), #34D399);
}

.seo-score-text {
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

/* SEO Analysis Highlighting */
.seo-good {
    background-color: #D1FAE5;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-sm);
    margin: 0.125rem 0;
    border-left: 3px solid var(--success-color);
}

.seo-bad {
    background-color: #FEE2E2;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-sm);
    margin: 0.125rem 0;
    border-left: 3px solid var(--danger-color);
}

.seo-warning-item {
    background-color: #FEF3C7;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-sm);
    margin: 0.125rem 0;
    border-left: 3px solid var(--warning-color);
}

.seo-warning {
    color: #B45309;
    font-weight: 600;
}

.check-content .seo-good strong,
.check-content .seo-bad strong,
.check-content .seo-warning-item strong {
    color: var(--text-primary);
}

/* Raw Data */
.raw-section {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 2px solid var(--border-light);
}

.toggle-raw {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: all 0.2s;
    font-weight: 500;
}

.toggle-raw:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.raw-data {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: #1E1E1E;
    color: #D4D4D4;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    border: 1px solid #2D2D2D;
}

/* Authentication Modal */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}

.auth-modal.hidden {
    display: none !important;
}

.auth-modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    width: 90%;
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
    border: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-2xl);
    border-bottom: 1px solid var(--border-color);
}

.auth-modal-header h2 {
    margin: 0;
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    font-weight: 700;
}

.auth-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.auth-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.auth-tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.auth-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.auth-form {
    padding: var(--spacing-2xl);
}

.auth-form-group {
    margin-bottom: var(--spacing-xl);
}

.auth-form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.auth-form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all 0.2s;
    box-sizing: border-box;
    font-family: var(--font-family);
    background: var(--bg-color);
}

.auth-form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.auth-error {
    background: #FEE2E2;
    color: #991B1B;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--danger-color);
    font-size: var(--font-size-sm);
}

.auth-submit-btn {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-md);
}

.auth-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.auth-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Social Login Styles */
.auth-divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    text-align: center;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.auth-divider span {
    padding: 0 15px;
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
}

.auth-social-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.auth-social-btn svg {
    flex-shrink: 0;
}

.twitter-btn {
    border-color: #1DA1F2;
    color: #1DA1F2;
}

.twitter-btn:hover {
    background: rgba(29, 161, 242, 0.1);
    border-color: #1DA1F2;
    color: #1DA1F2;
}

.auth-social-btn.coming-soon {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.auth-social-btn.coming-soon:hover {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
    transform: none;
}

.coming-soon-label {
    font-size: 13px;
    font-weight: 400;
    opacity: 0.8;
    margin-left: 4px;
}

/* Success Message */
.success-message {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--success-color);
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 10001;
    font-weight: 600;
    animation: slideInRight 0.3s ease;
    transition: opacity 0.3s;
    font-size: var(--font-size-sm);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
/* Mobile Menu Button */
.mobile-menu-button {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.mobile-menu-button span {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-button.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-button.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-button.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    flex-direction: column;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 999;
    box-shadow: var(--shadow-md);
    animation: slideDown 0.3s ease;
}

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

.mobile-nav.hidden {
    display: none;
}

.mobile-nav-link {
    display: block;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--border-light);
    transition: color 0.2s, background 0.2s;
}

.mobile-nav-link:last-of-type {
    border-bottom: none;
}

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

.mobile-nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

.mobile-nav-auth {
    padding: 1rem;
}

.mobile-user-info {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.mobile-user-info .user-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
}

.mobile-user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.mobile-user-email {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.mobile-user-subscription {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.mobile-user-scans {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.mobile-nav-button {
    width: 100%;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.mobile-nav-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
        position: relative;
        gap: 0.75rem;
    }
    
    /* Hide desktop nav */
    .nav {
        display: none;
    }
    
    /* Show mobile menu button */
    .mobile-menu-button {
        display: flex;
        order: 3;
        margin-left: 0;
        flex-shrink: 0;
    }
    
    /* Show mobile nav when not hidden */
    .mobile-nav:not(.hidden) {
        display: flex;
    }
    
    /* Adjust user menu on mobile - position before hamburger */
    .user-menu {
        order: 2;
        margin-left: auto;
        margin-right: 0.5rem;
        flex-shrink: 0;
    }
    
    /* Ensure logo can shrink but not too much */
    .logo {
        flex-shrink: 1;
        min-width: 0;
        order: 1;
    }
    
    .logo-text {
        font-size: var(--font-size-lg);
    }
    
    /* On mobile, hide all text in user menu button, show only icon */
    .user-menu-button {
        padding: 0.5rem;
        min-width: auto;
        gap: 0;
    }
    
    .user-menu-button span:not(.user-menu-badge) {
        display: none !important;
    }
    
    .user-menu-button .user-icon {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
        margin: 0;
    }
    
    /* Hide user menu badge on mobile (will be shown in mobile menu) */
    .user-menu-badge {
        display: none !important;
    }
    
    /* Hide dropdown on mobile - info will be in mobile menu */
    .user-menu-dropdown {
        display: none !important;
    }
    
    /* Make login button icon-only on mobile */
    #loginButton .user-menu-button {
        padding: 0.5rem;
        min-width: auto;
        gap: 0;
    }
    
    #loginButton .user-menu-button span {
        display: none !important;
    }
    
    /* Add icon to login button for mobile */
    #loginButton .user-menu-button::before {
        content: '👤';
        font-size: 1.25rem;
        display: block;
        line-height: 1;
    }
    
    .user-menu-dropdown {
        right: 0;
        left: auto;
        min-width: 250px;
    }
    
    /* Ensure mobile menu is above other content but below auth modal */
    .mobile-nav {
        z-index: 1002;
    }
    
    /* Ensure auth modal is above mobile menu */
    .auth-modal {
        z-index: 10003 !important;
    }
    
    /* Close mobile menu when user menu opens */
    .user-menu-dropdown:not(.hidden) ~ .mobile-nav {
        display: none !important;
    }
    
    .nav-link {
        font-size: var(--font-size-xs);
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    .hero .subtitle {
        font-size: var(--font-size-lg);
    }
    
    .scan-form {
        padding: var(--spacing-xl);
    }
    
    .input-group {
        flex-direction: column;
    }
    
    #scanButton {
        width: 100%;
    }
    
    .suitability-card {
        grid-template-columns: 1fr;
    }
    
    .auth-modal-content {
        width: 95%;
        margin: var(--spacing-xl);
    }
    
    .auth-modal-header,
    .auth-form {
        padding: var(--spacing-xl);
    }
    
    .user-menu-dropdown {
        right: 0;
        left: auto;
    }
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 2rem;
    margin-top: var(--spacing-3xl);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.footer-profile-image {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    object-fit: cover;
    transition: border-color 0.2s;
}

.footer-link:hover .footer-profile-image {
    border-color: var(--primary-color);
}