/* Elite Design System - Inspired by Stripe, Linear, Arc, Spotify */

:root {
    /* Primary Colors - Confidence & Trust */
    --primary-blue: #0066FF; /* Arc-inspired confidence blue */
    --primary-dark: #0A0F1B; /* Linear-inspired dark */
    --primary-white: #FFFFFF;
    --primary-light: #F7F9FB; /* Stripe-inspired light bg */
    
    /* Accent Colors - Warmth & Energy */
    --accent-coral: #FF6B6B; /* Confidence boost */
    --accent-green: #00D4AA; /* Success/transformation */
    --accent-purple: #6B5CE8; /* Premium feel */
    --accent-gold: #FFB800; /* Achievement */
    
    /* Neutral Palette - Clean & Modern */
    --gray-50: #FAFBFC;
    --gray-100: #F0F3F5;
    --gray-200: #E2E8ED;
    --gray-300: #C1CBD6;
    --gray-400: #8B9AAD;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    
    /* Typography Scale */
    --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Font Sizes - Perfect Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    
    /* Spacing System */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows - Subtle & Clean */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-system);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--gray-900);
    background: var(--primary-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "kern" 1;
    text-rendering: optimizeLegibility;
}

/* Navigation - Stripe-inspired floating nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    min-height: 60px;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-900);
}

/* Logo badge removed - clean design */

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:hover {
    color: var(--gray-900);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-blue);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.cta-nav {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.cta-nav:hover {
    background: #0052CC;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Hero Section - Arc-inspired confidence */
.hero {
    padding-top: calc(80px + var(--space-10));
    padding-bottom: var(--space-20);
    background: linear-gradient(180deg, var(--primary-white) 0%, var(--gray-50) 100%);
    position: relative;
    overflow: hidden;
}

/* Subtle gradient orb */
.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    text-align: center;
    position: relative;
    z-index: 1;
}

/* Trust Badge - Spotify-inspired */
.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--accent-green);
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-6);
    animation: subtle-pulse 3s ease-in-out infinite;
}

@keyframes subtle-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.95; transform: scale(1.02); }
}

/* Hero Title - Bold & Confident */
.hero-title {
    font-size: clamp(var(--text-4xl), 7vw, var(--text-7xl));
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
    color: var(--gray-900);
}

.confidence-gradient {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--gray-600);
    margin-bottom: var(--space-10);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Upload Section - Clean & Inviting */
.upload-container {
    max-width: 600px;
    margin: 0 auto var(--space-12);
}

.upload-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    padding: var(--space-8);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.upload-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    padding: var(--space-10) var(--space-6);
    transition: all var(--transition-base);
    cursor: pointer;
    background: var(--gray-50);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.upload-area:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.02) 0%, rgba(107, 92, 232, 0.02) 100%);
}

.upload-area.drag-over {
    border-color: var(--accent-green);
    background: rgba(0, 212, 170, 0.05);
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
}

.upload-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--gray-900);
}

.upload-subtitle {
    color: var(--gray-600);
    margin-bottom: var(--space-4);
}

/* Mode Selection - Linear-inspired toggles */
.mode-selection {
    margin: var(--space-8) 0;
    overflow: hidden;
    position: relative;
    contain: layout;
}

.mode-label {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
}

.mode-buttons {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    background: var(--gray-100);
    padding: var(--space-1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    flex-wrap: nowrap;
    position: relative;
    contain: layout;
}

.mode-btn {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    box-sizing: border-box;
    margin: 0;
    transform: none;
    vertical-align: middle;
}

.mode-btn:hover {
    color: var(--gray-900);
    transform: none;
}

.mode-btn:focus {
    outline: none;
    transform: none;
}

.mode-btn.active {
    background: rgba(0, 0, 0, 0.08);
    color: var(--gray-900);
    box-shadow: none;
    transform: none;
    outline: none;
}

.mode-btn span {
    display: block;
    font-size: var(--text-xs);
    opacity: 0.8;
    font-weight: 400;
    margin-top: 2px;
}

/* CTA Button - Compelling action */
.cta-primary {
    width: 100%;
    padding: var(--space-4) var(--space-8);
    background: linear-gradient(135deg, var(--primary-blue) 0%, #0052CC 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    margin-top: var(--space-6);
    box-shadow: 0 4px 14px 0 rgba(0, 102, 255, 0.25);
}

.cta-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.cta-primary:hover::before {
    width: 300px;
    height: 300px;
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 20px 0 rgba(0, 102, 255, 0.35);
}

.cta-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    margin-left: var(--space-2);
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Social Proof Stats - Clean metrics */
.confidence-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: 800px;
    margin: var(--space-16) auto;
}

.stat-card {
    text-align: center;
    padding: var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.stat-number {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Transformation Stories - Emotional proof */
.transformation-section {
    padding: var(--space-20) var(--space-6);
    background: var(--gray-50);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--gray-600);
    line-height: 1.6;
}

.story-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-6);
    max-width: 1280px;
    margin: 0 auto;
}

.story-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
    box-shadow: none;
}

.story-card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.story-quote {
    font-size: var(--text-lg);
    line-height: 1.6;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    position: relative;
}

/* Removed quotation mark pseudo-element for cleaner look */

.story-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
}

.author-details {
    flex: 1;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
}

.author-context {
    font-size: var(--text-sm);
    color: var(--gray-500);
}

.transformation-badge {
    display: inline-block;
    background: var(--accent-green);
    color: white;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    margin-top: var(--space-4);
}

/* How It Works - Simple steps */
.how-section {
    padding: var(--space-20) var(--space-6);
    background: white;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    max-width: 1000px;
    margin: 0 auto;
}

.step-card {
    text-align: center;
    padding: var(--space-6);
}

.step-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    transition: all var(--transition-base);
}

.step-card:hover .step-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    color: white;
    transform: scale(1.1);
}

.step-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.step-description {
    color: var(--gray-600);
    line-height: 1.5;
}

/* Activity Feed - Live confidence wins */
.activity-feed {
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    padding: var(--space-4) 0;
    overflow: hidden;
}

.activity-track {
    display: flex;
    animation: scroll-feed 40s linear infinite;
}

@keyframes scroll-feed {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.activity-item {
    white-space: nowrap;
    padding: 0 var(--space-8);
    color: white;
    font-size: var(--text-sm);
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.activity-emoji {
    font-size: var(--text-lg);
}

/* Footer - Minimal & Clean */
.footer {
    background: var(--gray-900);
    color: white;
    padding: var(--space-16) var(--space-6) var(--space-8);
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand h3 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2);
}

.footer-brand p {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-links h4 {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
    color: var(--gray-400);
}

.footer-links a {
    display: block;
    color: var(--gray-300);
    text-decoration: none;
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-800);
    text-align: center;
    color: var(--gray-500);
    font-size: var(--text-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: var(--text-4xl);
    }
    
    .confidence-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .story-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .mobile-only {
        display: block !important;
    }
    
    .upload-area {
        padding: var(--space-6) var(--space-4);
        overflow: hidden !important;
        position: relative;
    }
    
    .desktop-only {
        display: none !important;
    }
    
    .mode-selection {
        overflow: hidden !important;
        margin: var(--space-4) 0;
    }
    
    .mode-buttons {
        flex-wrap: wrap;
        gap: var(--space-2);
        padding: var(--space-2);
        position: relative;
        z-index: 1;
        max-width: 100%;
        overflow: hidden !important;
    }
    
    .mode-btn {
        min-width: 0;
        flex: 1 1 auto;
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin: 0;
        position: relative;
        z-index: 1;
        outline: none;
    }
    
    .mode-btn.active {
        background: rgba(0, 0, 0, 0.08);
        box-shadow: none;
        border: none;
        outline: none;
        padding: var(--space-2) var(--space-3);
    }
    
    .mode-btn span {
        display: none;
    }
}

@media (max-width: 480px) {
    .mode-buttons {
        flex-direction: column;
        gap: var(--space-1);
        padding: var(--space-1);
        max-height: none;
    }
    
    .mode-btn {
        width: 100%;
        flex: none;
        padding: var(--space-2) var(--space-3);
        text-align: center;
        margin: 0;
    }
    
    .mode-btn.active {
        background: rgba(0, 0, 0, 0.08);
    }
}

/* Animations */
@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-up {
    animation: fade-up 0.6s ease-out forwards;
}

/* Premium badge for locked modes */
.premium-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-btn.premium-mode {
    position: relative;
}

.mode-btn.premium-mode:not(.active) {
    opacity: 0.9;
}

/* Utility Classes */
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }