/* CSS Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-bg: rgba(99, 102, 241, 0.1);

    --text-primary: #1a1a2e;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f0f1a;

    --border-color: #e2e8f0;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --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);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: 1.5rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

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

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

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.nav-links a.btn-primary {
    color: white;
}

.nav-links a.btn-primary:hover {
    color: white;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* Hero Section */
.hero {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.hero-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.hero h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    padding: 12px;
    background: #1a1a1a;
    border-radius: 40px;
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: #1a1a1a;
    border-radius: 12px;
    z-index: 10;
}

.phone-mockup img {
    width: 100%;
    border-radius: 28px;
    display: block;
}

/* Benefits Section */
.benefits {
    padding: 80px 0;
    background: var(--bg-white);
}

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

.benefit-card {
    padding: 32px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.benefit-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    color: var(--primary);
    margin-bottom: 16px;
}

.benefit-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-top: 16px;
}

.features-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.feature-card.reverse {
    direction: rtl;
}

.feature-card.reverse > * {
    direction: ltr;
}

.feature-image {
    display: flex;
    justify-content: center;
}

.feature-image img {
    max-width: 300px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.feature-tag {
    display: inline-block;
    padding: 6px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.feature-content h3 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

/* How It Works */
.how-it-works {
    padding: 100px 0;
    background: var(--bg-white);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    max-width: 250px;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--primary);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 24px;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

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

.step-connector {
    flex-shrink: 0;
    width: 60px;
    height: 2px;
    background: var(--border-color);
    margin-top: 32px;
}

/* Why Section */
.why-section {
    padding: 80px 0;
    background: var(--bg-dark);
    color: white;
}

.why-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.why-content h2 {
    margin-bottom: 16px;
}

.why-intro {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.why-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.9);
}

.why-item svg {
    flex-shrink: 0;
    color: var(--primary-light);
}

/* FAQ Section */
.faq {
    padding: 100px 0;
    background: var(--bg-light);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

.download .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-content h2 {
    margin-bottom: 16px;
}

.download-content > p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

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

.store-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background: var(--text-primary);
    color: white;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.store-button:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.store-text {
    text-align: left;
    color: white;
}

.store-text span {
    display: block;
    font-size: 0.75rem;
    opacity: 0.8;
    color: white;
}

.store-text strong {
    font-size: 1.125rem;
    color: white;
}

.download-image {
    display: flex;
    justify-content: center;
}

/* Footer */
.footer {
    padding: 60px 0 24px;
    background: var(--bg-dark);
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    max-width: 250px;
}

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

.footer-column h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.875rem;
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

/* Mobile menu styles */
@media (max-width: 640px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-links.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* Responsive */
@media (max-width: 968px) {
    .hero-bg {
        display: none;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 0;
    }

    .hero-image {
        order: 1;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

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

    .feature-content {
        order: 1;
    }

    .feature-list {
        display: inline-block;
        text-align: left;
    }

    .feature-image {
        order: 0;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }

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

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

    .download .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .download-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

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

    .footer-brand {
        margin-bottom: 24px;
    }

    .footer-brand p {
        max-width: none;
    }

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

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }

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

    .hero {
        padding: 120px 0 60px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .stat-divider {
        width: 60px;
        height: 1px;
    }

    .phone-mockup {
        width: 240px;
    }

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

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

    .store-button {
        justify-content: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}