:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background-color: #f8fafc;
    --section-bg: #ffffff;
    --border-radius: 12px;
    --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);
    --max-width: 1200px;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: 36px;
    margin-right: 12px;
    border-radius: 8px;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--text-color);
    font-weight: 600;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
    font-size: 1rem;
}

nav ul li a:hover {
    color: var(--primary-color);
}

main {
    margin-top: var(--header-height);
    overflow-x: hidden;
}

section {
    padding: 5rem 2rem;
}

section > div {
    max-width: var(--max-width);
    margin: 0 auto;
}

#hero {
    background: linear-gradient(135deg, #2563eb11 0%, #60a5fa11 100%);
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: 0 2rem;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    padding-right: 2rem;
}

.hero-text h2 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.app-frame {
    width: 100%;
    height: 600px;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    background-color: var(--section-bg);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background-color: var(--secondary-color);
}

.cta-button i {
    margin-right: 0.75rem;
}

#features {
    background-color: var(--section-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--light-text);
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    background-color: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

#download {
    background: linear-gradient(135deg, #2563eb11 0%, #60a5fa11 100%);
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--section-bg);
    color: var(--text-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background-color: var(--primary-color);
    color: white;
}

.download-btn i {
    font-size: 1.5rem;
    margin-right: 1rem;
}

#about {
    background-color: var(--section-bg);
    text-align: center;
}

#about p {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--light-text);
    line-height: 1.8;
}

#how-it-works {
    background: linear-gradient(135deg, #2563eb11 0%, #60a5fa11 100%);
    padding: 5rem 2rem;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    background-color: var(--section-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.step i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.step p {
    color: var(--light-text);
    line-height: 1.6;
}

footer {
    background-color: var(--text-color);
    color: white;
    padding: 3rem 2rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

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

.footer-links a i {
    margin-right: 0.5rem;
}

@media screen and (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text {
        padding-right: 0;
    }

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

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

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

@media screen and (max-width: 768px) {
    section {
        padding: 3rem 1.5rem;
    }

    .hero-text h2 {
        font-size: 2.5rem;
    }

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

    .process-steps {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    nav {
        padding: 0 1rem;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    nav ul {
        gap: 1rem;
    }

    .hero-text h2 {
        font-size: 2rem;
    }
}