:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-alt: #f9fafb;
    --white: #ffffff;
    --max-width: 1200px;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-list {
    display: flex;
    gap: 30px;
    align-items: center;
}

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-outline {
    border: 1px solid var(--text-light);
    color: var(--text-color);
}

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

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(to bottom, #f0fdf4, #ffffff);
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #111827;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background-color: #111827;
    border-radius: 40px;
    padding: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    position: relative;
}

.screen {
    background-color: #fff;
    width: 100%;
    height: 100%;
    border-radius: 25px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.app-header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
    text-align: center;
    font-weight: bold;
}

.app-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    justify-content: center;
}

.translation-bubble {
    background-color: #f3f4f6;
    padding: 15px;
    border-radius: 15px;
    border-bottom-left-radius: 0;
    max-width: 80%;
}

.translation-bubble:nth-child(2) {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
    border-radius: 15px;
    border-bottom-right-radius: 0;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
}

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

.about-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about-image {
    flex: 1;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background-color: #e5e7eb;
    border-radius: var(--radius);
}

.about-content {
    flex: 1;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.store-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.store-btn {
    padding: 12px 30px;
    background-color: var(--white);
    color: var(--primary-color);
    border: none;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s;
}

.store-btn:hover {
    transform: scale(1.05);
}

/* Footer */
.footer {
    padding: 60px 0;
    background-color: #111827;
    color: #9ca3af;
}

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

.footer-brand .logo {
    color: var(--white);
    display: block;
    margin-bottom: 10px;
}

.footer-links {
    display: flex;
    gap: 30px;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        position: relative;
    }

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

    .nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow);
        padding: 20px;
        border-radius: 0 0 var(--radius) var(--radius);
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .hero-container,
    .about-container {
        flex-direction: column;
        text-align: center;
    }

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

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .footer-container {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}