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

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-light: #f5f5f5;
    --color-gray: #888888;
    --color-gray-dark: #333333;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --max-width: 1200px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Lora', Georgia, 'Times New Roman', serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-family);
    font-size: 20px;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-family: var(--font-family);
    color: var(--color-black);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    transition: opacity 0.2s ease;
}

.nav-links a:hover {
    opacity: 0.6;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 300;
    line-height: 1.2;
    letter-spacing: -1.5px;
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    max-width: 700px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.hero-logo {
    height: 200px;
    width: auto;
    opacity: 0.9;
    flex-shrink: 0;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 300;
    color: var(--color-gray-dark);
    line-height: 1.5;
    margin: 0;
}

.hero-cta {
    margin-top: var(--spacing-lg);
}

.app-store-link {
    display: inline-block;
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    padding: 14px 32px;
    border: 1.5px solid var(--color-black);
    border-radius: 8px;
    transition: all 0.2s ease;
    letter-spacing: -0.2px;
}

.app-store-link:hover {
    background-color: var(--color-black);
    color: var(--color-white);
    transform: translateY(-1px);
}

.app-store-link:active {
    transform: translateY(0);
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.feature-item h3 {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.feature-item p {
    font-size: 16px;
    color: var(--color-gray-dark);
    line-height: 1.6;
    font-weight: 300;
}

/* Screenshots Section */
.screenshots {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.section-title {
    font-size: 32px;
    font-weight: 300;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

.carousel-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.carousel-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    background-color: var(--color-gray-light);
    margin-bottom: var(--spacing-md);
    max-height: 80vh;
    min-height: 400px;
}

.carousel {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
}

.carousel-item {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.carousel-image {
    max-width: 100%;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
    background-color: var(--color-gray-light);
    border-radius: 4px;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.carousel-btn {
    background: none;
    border: 0px solid rgba(0, 0, 0, 0.2);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-black);
}

.carousel-btn:hover {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.carousel-btn:active {
    transform: scale(0.95);
}

.carousel-indicators {
    display: flex;
    gap: var(--spacing-xs);
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.2s ease;
}

.indicator.active {
    background-color: var(--color-black);
    width: 24px;
    border-radius: 4px;
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.about-text {
    font-size: 20px;
    font-weight: 300;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    color: var(--color-gray-dark);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    text-align: center;
}

.footer p {
    font-size: 14px;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
}

.footer a {
    color: var(--color-gray);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Privacy Page */
.privacy-content {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.privacy-content h1 {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.privacy-content h2 {
    font-size: 24px;
    font-weight: 400;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.5px;
}

.privacy-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-dark);
    font-weight: 300;
}

.privacy-content ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.privacy-content li {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-dark);
    font-weight: 300;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle-wrapper {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-logo {
        height: 200px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .section-title {
        font-size: 28px;
    }

    .carousel-wrapper {
        max-height: 70vh;
        min-height: 300px;
    }

    .carousel-image {
        max-height: 70vh;
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

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