/* ===== CSS Variables ===== */
:root {
    --primary-green: #34C759;
    --primary-green-dark: #2DB14E;
    --primary-cyan: #5AC8FA;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --background: #FFFFFF;
    --background-secondary: #F5F5F7;
    --card-background: #FFFFFF;
    --border-color: #E5E5E7;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --radius-sm: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

ul {
    list-style: none;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    color: white;
    box-shadow: 0 4px 16px rgba(52, 199, 89, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(52, 199, 89, 0.4);
}

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

.btn-secondary:hover {
    background: var(--border-color);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    color: var(--text-primary);
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.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-green);
}

.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);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--background-secondary) 0%, var(--background) 100%);
}

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

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-buttons {
    margin-bottom: 32px;
}

.hero-badge {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
}

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

.phone-mockup {
    position: relative;
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #1a1a1a, #2d2d2d);
    border-radius: 44px;
    padding: 12px;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.3);
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #1a1a1a;
    border-radius: 20px;
    z-index: 10;
}

.phone-mockup img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32px;
    background: linear-gradient(180deg, #f5f5f7 0%, #e8e8ed 100%);
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

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

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
}

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

.feature-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

.feature-card.featured {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.03) 0%, rgba(90, 200, 250, 0.03) 100%);
}

.feature-badge {
    display: inline-block;
    margin-top: 12px;
    padding: 6px 12px;
    background: linear-gradient(135deg, var(--primary-green), #5856D6);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Languages Section ===== */
.languages {
    padding: 80px 0;
    background: var(--background-secondary);
}

.languages-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
}

.language-item {
    background: var(--card-background);
    padding: 16px 28px;
    border-radius: 100px;
    font-weight: 500;
    font-size: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.language-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ===== About Section ===== */
.about {
    padding: 100px 0;
}

.about-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-lead {
    font-size: 20px;
    font-weight: 500;
    color: var(--primary-green);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-green);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about-card {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-cyan));
    border-radius: var(--radius);
    padding: 40px;
    color: white;
    text-align: center;
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.about-card h4 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.about-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

/* ===== Download Section ===== */
.download {
    padding: 100px 0;
    background: var(--background-secondary);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}

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

.platform-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--background-secondary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.platform-icon.android {
    color: #3DDC84;
}

.download-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.status {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
}

.status.available {
    background: rgba(52, 199, 89, 0.15);
    color: var(--primary-green);
}

.status.coming {
    background: rgba(255, 149, 0, 0.15);
    color: #FF9500;
}

.download-btn {
    width: 100%;
}

.download-card.coming-soon {
    opacity: 0.8;
}

.download-card.coming-soon .download-btn {
    cursor: not-allowed;
}

/* ===== Contact Section ===== */
.contact {
    padding: 100px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(52, 199, 89, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-green);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item a,
.contact-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

.contact-item a:hover {
    color: var(--primary-green);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
    background: var(--background);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(52, 199, 89, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.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: 12px;
}

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

.footer-links {
    display: flex;
    gap: 80px;
    justify-content: flex-end;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 24px;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

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

    .hero-content h1 {
        font-size: 44px;
    }

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

    .hero-image {
        order: -1;
    }

    .phone-mockup {
        width: 240px;
        height: 500px;
    }

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

    .about-container {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
    }

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

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

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

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

    .section-header h2 {
        font-size: 32px;
    }

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

    .download-cards {
        grid-template-columns: 1fr;
    }

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

    .footer-links {
        flex-direction: column;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-content h1 {
        font-size: 32px;
    }

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

    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }

    .phone-mockup {
        width: 200px;
        height: 420px;
    }

    .about-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 28px;
    }
}