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

:root {
    --primary-color: #f97316;
    --primary-dark: #ea580c;
    --primary-light: #fb923c;
    --secondary-color: #4A90A4;
    --secondary-dark: #3A7A8C;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --border-color: #E5E7EB;
    --success-color: #5FA777;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --gradient-1: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --gradient-2: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

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

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-left: 24px;
}

.lang-flag {
    background: none;
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 4px 8px;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.lang-flag:hover {
    background: var(--bg-light);
    transform: scale(1.1);
}

.lang-flag.active {
    border-color: var(--primary-color);
    background: var(--bg-light);
}

/* Mobile Language Switcher (in hamburger menu) */
.mobile-lang-switcher {
    display: none;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
}

.mobile-lang-switcher .lang-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mobile-lang-switcher .lang-buttons {
    display: flex;
    gap: 8px;
}

.mobile-lang-switcher .lang-flag {
    flex: 1;
    padding: 12px 16px;
    font-size: 16px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 2px solid var(--border-color);
}

.mobile-lang-switcher .lang-flag.active {
    border-color: var(--primary-color);
    background: var(--bg-light);
    font-weight: 600;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 140px 0 80px;
}

.hero .container {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 500px;
    width: 100%;
    margin-left: 0;
    margin-right: auto;
}

.hero-text {
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.8s ease-out;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(30px) saturate(180%);
    padding: 48px;
    border-radius: 28px;
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    border: 1px solid rgba(255, 255, 255, 0.9);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-text:hover {
    transform: translateY(-2px);
    box-shadow: 0 35px 120px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary) 0%, #2D3748 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.7;
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #E1F3F7 0%, #E8F5ED 100%);
    border: 2px solid #4A90A4;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary-dark);
    margin-bottom: 32px;
    animation: pulse 2s infinite;
}

.ai-badge svg path {
    fill: #4A90A4;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(74, 144, 164, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(74, 144, 164, 0);
    }
}

.cta-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 0;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    font-size: 15px;
    position: relative;
    overflow: hidden;
}

.btn > * {
    position: relative;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: 0;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(74, 144, 164, 0.3);
}

.btn-web {
    background: linear-gradient(135deg, #4A90A4 0%, #3A7A8C 100%) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 14px rgba(74, 144, 164, 0.3) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.btn-web:hover {
    background: linear-gradient(135deg, #3A7A8C 0%, #4A90A4 100%) !important;
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 24px rgba(74, 144, 164, 0.4) !important;
    color: white !important;
}

.btn-web-app {
    background: #4A90A4 !important;
    color: white !important;
    padding: 8px 16px !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
    text-decoration: none !important;
    transition: all 0.3s ease !important;
    font-size: 14px !important;
    border: 2px solid #4A90A4 !important;
    display: inline-block !important;
}

.btn-web-app:hover {
    background: #3A7A8C !important;
    transform: translateY(-1px) !important;
    color: white !important;
    border-color: #3A7A8C !important;
    text-decoration: none !important;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(254, 243, 199, 0.9) 0%, rgba(255, 237, 213, 0.9) 100%);
    backdrop-filter: blur(10px);
    border: 1.5px solid rgba(249, 115, 22, 0.3);
    border-radius: 24px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 24px;
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease-out 0.1s both;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.1);
}

.hero-badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(249, 115, 22, 0.15);
    border-color: rgba(249, 115, 22, 0.5);
}

.hero-badge svg {
    flex-shrink: 0;
}


/* Hero Slideshow - Background */
.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slideshow-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 2s cubic-bezier(0.4, 0, 0.2, 1);
    transform: scale(1.05);
}

.slide.active {
    opacity: 1;
    z-index: 1;
    transform: scale(1);
    transition: opacity 2s cubic-bezier(0.4, 0, 0.2, 1), transform 2s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 2s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide.active img {
    transform: scale(1.02);
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, 
        rgba(31, 41, 55, 0.88) 0%, 
        rgba(31, 41, 55, 0.7) 25%, 
        rgba(31, 41, 55, 0.5) 50%, 
        rgba(31, 41, 55, 0.25) 75%, 
        rgba(31, 41, 55, 0.08) 100%);
    pointer-events: none;
    z-index: 2;
}

.slideshow-controls {
    position: absolute;
    bottom: 40px;
    right: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 3;
}

.slide-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.9);
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 32px;
    height: 32px;
}

.slide-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: scale(1.1);
}

.slide-btn:active {
    transform: scale(0.95);
}

.slide-indicators {
    display: flex;
    gap: 6px;
    align-items: center;
}

.indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: rgba(255, 255, 255, 0.9);
    width: 20px;
    border-radius: 3px;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.7);
}

/* Phone Mockup */
.phone-mockup {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: #1F2937;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background: #1F2937;
    border-radius: 0 0 20px 20px;
    z-index: 1;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #EEF2FF 0%, #FFFFFF 100%);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
}

.phone-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32px;
}

.app-preview {
    padding: 40px 20px 20px;
}

.preview-header {
    margin-bottom: 20px;
}

.preview-search {
    height: 40px;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.preview-books {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.preview-book {
    height: 100px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-white);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #f97316 50%, transparent 100%);
    opacity: 0.3;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-card.featured {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, #FFFFFF 0%, #FFF7ED 100%);
}

.feature-card.featured::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-1);
    border-radius: 16px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card.featured:hover::before {
    opacity: 0.1;
}

.feature-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 12px;
    letter-spacing: 0.5px;
}

.feature-icon {
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.how-it-works::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(74, 144, 164, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(249, 115, 22, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.step {
    text-align: center;
    position: relative;
}

.step::after {
    content: '→';
    position: absolute;
    top: 40px;
    right: -20px;
    font-size: 32px;
    color: #f97316;
    opacity: 0.3;
}

.step:last-child::after {
    display: none;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 700;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-lg);
}

.step h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.download::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(74, 144, 164, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
}

.download-subtitle {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 48px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.store-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.store-button svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    overflow: visible;
}

.store-button:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.store-button.web {
    background: rgba(74, 144, 164, 0.2);
    border-color: rgba(74, 144, 164, 0.4);
}

.store-button.web:hover {
    background: rgba(74, 144, 164, 0.3);
    border-color: rgba(74, 144, 164, 0.6);
    transform: translateY(-2px);
}

.button-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.button-text .small {
    font-size: 10px;
    text-transform: uppercase;
    opacity: 0.8;
}

.button-text .large {
    font-size: 18px;
    font-weight: 700;
}

.download-stats {
    display: flex;
    gap: 48px;
    align-items: center;
}

.rating, .downloads {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stars {
    color: #FCD34D;
    font-size: 20px;
    letter-spacing: 2px;
}

.downloads .number {
    font-size: 28px;
    font-weight: 700;
}

.app-screens {
    display: flex;
    gap: 20px;
    justify-content: center;
    perspective: 1000px;
}

.screen {
    width: 140px;
    height: 280px;
    background: linear-gradient(180deg, #EEF2FF 0%, #FFFFFF 100%);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    border: 8px solid #1F2937;
    overflow: hidden;
}

.screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.screen-1 {
    transform: translateY(-20px) rotate(-5deg);
}

.screen-2 {
    transform: scale(1.1);
    z-index: 2;
}

.screen-3 {
    transform: translateY(-20px) rotate(5deg);
}

/* Founder Book Section */
.founder-book {
    padding: 100px 0;
    background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
}

.founder-book-content {
    display: grid;
    grid-template-columns: minmax(240px, 360px) 1fr;
    gap: 56px;
    align-items: center;
}

.founder-book-cover-link {
    display: block;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.founder-book-cover-link:hover {
    transform: translateY(-8px);
    box-shadow: 0 28px 42px -10px rgba(31, 41, 55, 0.28);
}

.founder-book-cover-link img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.founder-book-badge {
    display: inline-block;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    padding: 7px 14px;
    border-radius: 999px;
    margin-bottom: 18px;
}

.founder-book-text h2 {
    font-size: 38px;
    line-height: 1.2;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.founder-book-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 720px;
}

.founder-book-btn {
    margin-top: 12px;
}

/* About Section */
.about {
    padding: 100px 0;
    background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1200px;
    height: 1200px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.about::after {
    content: '';
    position: absolute;
    top: 10%;
    right: 5%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(74, 144, 164, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.about-content {
    position: relative;
    z-index: 1;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-1);
    color: white;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.about-text h2 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 32px;
    line-height: 1.2;
}

.about-description {
    max-width: 900px;
    margin: 0 auto 48px;
}

.about-highlight {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 32px;
    background: linear-gradient(135deg, #F0F9F4 0%, #F0F7F9 100%);
    border-radius: 16px;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 24px;
}

.about-highlight p {
    font-size: 20px;
    color: var(--text-primary);
    line-height: 1.7;
    margin: 0;
}

.about-highlight strong {
    color: var(--primary-color);
}

.about-description > p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: center;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 48px 0;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.about-stat {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.stat-icon {
    font-size: 32px;
    line-height: 1;
}

.stat-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-text {
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.value-card {
    padding: 32px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.value-card:hover::before {
    opacity: 1;
}

.value-icon {
    margin: 0 auto 20px;
    width: 40px;
    height: 40px;
}

.value-card h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    padding: 60px 0 24px;
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 12px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.link-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.link-group h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.link-group a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
}

/* Active navigation link */
.nav-links a.active {
    color: var(--primary-color);
    position: relative;
    font-weight: 600;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .download-image {
        order: -1;
    }

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

    .founder-book-content {
        gap: 40px;
    }

    .founder-book-text h2 {
        font-size: 34px;
    }

    .hero .container {
        justify-content: flex-start;
    }

    .hero-content {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    /* Hide desktop language switcher on mobile */
    .lang-switcher {
        display: none;
    }

    /* Show mobile language switcher in hamburger menu */
    .mobile-lang-switcher {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        gap: 16px;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a.active::after {
        display: none;
    }

    .hero-slideshow {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
        background: linear-gradient(180deg, #F9FAFB 0%, #FFFFFF 100%);
    }

    .hero .container {
        justify-content: flex-start;
    }

    .hero-content {
        max-width: 100%;
        margin-top: 0;
        margin-left: 0;
    }

    .hero-text {
        padding: 32px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .features-grid,
    .steps,
    .about-values,
    .about-stats,
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .about-highlight {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .section-header h2,
    .download h2,
    .about-text h2 {
        font-size: 32px;
    }

    .step::after {
        display: none;
    }

    .download-buttons {
        flex-direction: column;
    }

    .founder-book {
        padding: 80px 0;
    }

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

    .founder-book-cover-link {
        max-width: 300px;
        margin: 0 auto;
    }

    .founder-book-text h2 {
        font-size: 30px;
    }

    .founder-book-text p {
        font-size: 17px;
        margin-left: auto;
        margin-right: auto;
    }

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

    .app-screens {
        gap: 10px;
    }

    .screen {
        width: 100px;
        height: 200px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-slideshow {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 100px 0 40px;
        background: linear-gradient(180deg, #F9FAFB 0%, #FFFFFF 100%);
    }

    .hero .container {
        justify-content: flex-start;
    }

    .hero-content {
        margin-left: 0;
    }

    .hero-text {
        padding: 24px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.feature-card,
.step {
    animation: fadeInUp 0.6s ease-out;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

/* Coming Soon Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--bg-white);
    margin: auto;
    margin-top: 10vh;
    max-width: 500px;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.4s ease-out;
    position: relative;
    overflow: hidden;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-1);
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 32px;
    font-weight: 300;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 10001;
    pointer-events: auto;
    user-select: none;
}

.modal-close:hover {
    color: var(--primary-color);
    background: var(--bg-light);
    transform: rotate(90deg);
}

.modal-icon {
    font-size: 80px;
    text-align: center;
    margin: 40px 0 20px;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.modal-content h2 {
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding: 0 40px;
}

.modal-content p {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 0 40px;
    margin-bottom: 40px;
}

.modal-button {
    display: block;
    width: calc(100% - 80px);
    margin: 0 auto 40px;
    padding: 16px;
    background: var(--gradient-1);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.modal-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.modal-button:active {
    transform: translateY(0);
}

@media (max-width: 600px) {
    .modal-content {
        margin: 20px;
        margin-top: 15vh;
        max-width: calc(100% - 40px);
    }

    .modal-content h2 {
        font-size: 24px;
        padding: 0 20px;
    }

    .modal-content p {
        font-size: 16px;
        padding: 0 20px;
    }

    .modal-button {
        width: calc(100% - 40px);
    }

    .modal-icon {
        font-size: 60px;
    }
}

/* Newsletter Modal */
.newsletter-modal {
    display: none;
}

.newsletter-modal-content {
    max-width: 520px;
    padding: 0;
    position: relative;
    z-index: 1;
}

.newsletter-icon {
    font-size: 64px;
    text-align: center;
    margin: 30px 0 20px;
    animation: bounce 1s ease-in-out infinite;
}

.newsletter-form {
    padding: 0 40px 40px;
}

.newsletter-input-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.newsletter-input {
    flex: 1;
    min-width: 200px;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-white);
    color: var(--text-primary);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.newsletter-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.newsletter-submit-btn {
    padding: 14px 32px;
    background: var(--gradient-1);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
    white-space: nowrap;
    font-family: inherit;
}

.newsletter-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.newsletter-submit-btn:active {
    transform: translateY(0);
}

.newsletter-privacy {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    margin: 0;
    padding: 0 20px;
}

.newsletter-success {
    padding: 0 40px 40px;
    text-align: center;
}

.success-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    font-weight: 700;
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.newsletter-success p {
    font-size: 18px;
    color: var(--text-primary);
    font-weight: 600;
    margin: 0;
}

@media (max-width: 600px) {
    .newsletter-modal-content {
        margin: 20px;
        margin-top: 15vh;
        max-width: calc(100% - 40px);
    }

    .newsletter-icon {
        font-size: 48px;
        margin: 20px 0 16px;
    }

    .newsletter-form {
        padding: 0 20px 30px;
    }

    .newsletter-input-wrapper {
        flex-direction: column;
    }

    .newsletter-input {
        width: 100%;
        min-width: unset;
    }

    .newsletter-submit-btn {
        width: 100%;
    }

    .newsletter-success {
        padding: 0 20px 30px;
    }

    .success-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .newsletter-success p {
        font-size: 16px;
    }
}

/* End of styles */