/* ========================================
   Real Life Subtitles - Modern CSS
   ======================================== */

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

:root {
    /* Colors */
    --primary: #007AFF;
    --primary-dark: #0051D5;
    --secondary: #5856D6;
    --accent: #007AFF;
    --success: #34C759;
    --danger: #FF3B30;
    --warning: #FF9500;

    /* Grays */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Background */
    --bg-primary: #0A0E1A;
    --bg-secondary: #141824;
    --bg-tertiary: #1E2330;
    --bg-card: #1E2330;

    /* Text */
    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
    --text-tertiary: #6B7280;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --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, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(20, 24, 36, 0.9);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-emoji {
    font-size: 1.75rem;
}

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

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

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 0.9375rem;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.btn-link {
    background: none;
    color: var(--primary);
    padding: 0;
}

.btn-link:hover {
    text-decoration: underline;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.0625rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: var(--spacing-4xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-2xl);
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.feature-icon {
    font-size: 1.25rem;
}

/* ========================================
   Sections
   ======================================== */

.features-overview,
.use-cases,
.pricing-preview,
.pricing-section,
.feature-comparison,
.faq-section,
.value-section,
.feature-detail-section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.page-header {
    padding: var(--spacing-3xl) 0;
    text-align: center;
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Cards
   ======================================== */

.feature-grid,
.use-case-grid,
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card,
.use-case-card,
.value-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.feature-card:hover,
.use-case-card:hover,
.value-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
}

.feature-icon-large,
.use-case-emoji,
.value-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.feature-card h3,
.use-case-card h3,
.value-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

/* ========================================
   Pricing Cards
   ======================================== */

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-cards-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.pricing-card,
.pricing-card-large {
    background: var(--bg-card);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card-large {
    padding: var(--spacing-2xl);
}

.pricing-card:hover,
.pricing-card-large:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
}

.pricing-card-featured {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.05) 0%, rgba(88, 86, 214, 0.05) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.pricing-badge-large {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 1.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: var(--shadow-lg);
}

.pricing-header,
.pricing-card-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

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

.pricing-card-header h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.pricing-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.pricing-price,
.pricing-amount {
    margin-bottom: var(--spacing-lg);
}

.pricing-amount {
    margin-bottom: var(--spacing-xl);
}

.price,
.price-large {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
}

.price-large {
    font-size: 3.5rem;
}

.period,
.price-period {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.pricing-features,
.pricing-features-large {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.pricing-features-large li {
    padding: var(--spacing-md) 0;
    display: flex;
    align-items: start;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.feature-check {
    color: var(--success);
    font-weight: 700;
    font-size: 1.125rem;
}

.feature-cross {
    color: var(--text-tertiary);
    font-weight: 700;
    font-size: 1.125rem;
}

.pricing-note {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ========================================
   Feature Details
   ======================================== */

.feature-detail {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
    margin-bottom: var(--spacing-4xl);
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
}

.feature-detail-reverse {
    grid-template-columns: 1fr auto;
}

.feature-detail-icon {
    font-size: 4rem;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 122, 255, 0.1);
    border-radius: var(--radius-lg);
}

.feature-detail-icon.pro-badge {
    position: relative;
}

.pro-tag {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--primary);
    color: white;
    font-size: 0.625rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.feature-detail-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.feature-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-point {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

.point-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
}

.feature-point h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.feature-point p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Comparison Table
   ======================================== */

.comparison-table {
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.comparison-table thead {
    background: rgba(0, 122, 255, 0.1);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.comparison-table th {
    font-weight: 700;
    font-size: 1.125rem;
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.check {
    color: var(--success);
    font-weight: 600;
}

.cross {
    color: var(--text-tertiary);
}

/* ========================================
   FAQ
   ======================================== */

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.faq-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

.faq-item a {
    color: var(--primary);
    text-decoration: none;
}

.faq-item a:hover {
    text-decoration: underline;
}

/* ========================================
   CTA Sections
   ======================================== */

.cta-section,
.download-cta {
    padding: var(--spacing-4xl) 0;
    text-align: center;
}

.cta-section {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-section h2,
.download-cta h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-section p,
.download-cta p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-note,
.download-note {
    margin-top: var(--spacing-md);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.cta-center {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--text-primary);
}

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

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .page-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

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

    .hero-buttons .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .feature-grid,
    .use-case-grid,
    .value-grid {
        grid-template-columns: 1fr;
    }

    .pricing-cards,
    .pricing-cards-large {
        grid-template-columns: 1fr;
    }

    .feature-detail,
    .feature-detail-reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .feature-detail-icon {
        margin: 0 auto;
    }

    .feature-point {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .point-icon {
        margin: 0 auto;
    }

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

    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .price-large {
        font-size: 2.5rem;
    }

    .feature-detail-content h2 {
        font-size: 1.5rem;
    }

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

/* ========================================
   Animations
   ======================================== */

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* ========================================
   Utilities
   ======================================== */

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }