:root {
    /* Colors - Pure Minimalist Black & White */
    --bg-color: #f5f0e8;
    --text-primary: #000000;
    --text-secondary: #666666;
    --accent-bg: #0a0a0a;
    --accent-text: #ffffff;
    --border-color: #e5e5e5;
    --card-bg: #ede8df;
    --hover-bg: #1a1a1a;
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    
    /* Layout */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 15px;
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}



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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Scrollbar minimalist */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-pill);
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

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

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
    display: block;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    border-color: var(--border-color);
    background-color: var(--card-bg);
}

/* Hero Section */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    margin-bottom: 1rem;
}

.highlight {
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: var(--text-primary);
    opacity: 0.1;
    border-radius: 4px;
    z-index: -1;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
}

.download-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.version-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.privacy-notice {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.privacy-link {
    color: var(--text-primary);
    text-decoration: underline;
    font-weight: 500;
    transition: color 0.3s ease;
}

.privacy-link:hover {
    color: var(--text-secondary);
    text-decoration: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 1.75rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    outline: none;
}

.btn-primary {
    background-color: var(--accent-bg);
    color: var(--accent-text);
    border: none;
    box-shadow: var(--shadow-md);
    transition: opacity 0.18s ease;
}

.btn-primary:hover {
    opacity: 0.75;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    transition: border-color 0.18s ease;
}

.btn-secondary:hover {
    border-color: #000000;
}

.icon {
    flex-shrink: 0;
}

/* Shared Section Styles */
section {
    margin-bottom: 6rem;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

/* Cards */
.info-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    border: 1px solid var(--border-color);
}

.card-icon {
    background-color: var(--bg-color);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-pill);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.card-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.step-card {
    background-color: var(--bg-color);
    border: 1px solid #b8ae9e;
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.step-number {
    font-size: 4rem;
    font-weight: 800;
    color: #b8ae9e;
    line-height: 1;
    margin-bottom: 1rem;
}

.step-info h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.step-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* iOS Notice */
.ios-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    margin-top: -4rem;
}

/* Support Badge */
.support {
    text-align: center;
    background-color: var(--card-bg);
    padding: 4rem 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.support-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.support-content p {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.path-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--bg-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
}

.path-badge span {
    color: var(--text-primary);
}

.path-badge svg {
    color: var(--text-secondary);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

/* Stagger animations */
.hero { animation-delay: 0.1s; }
.warning { animation-delay: 0.3s; }
.installation-guide { animation-delay: 0.5s; }
.support { animation-delay: 0.7s; }

@keyframes fadeIn {
    to { opacity: 1; }
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 600px) {
    .button-group {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
    }
    
    .download-wrapper {
        width: 100%;
        align-items: stretch;
    }
    
    .version-label {
        text-align: center;
    }
    
    .btn {
        width: 100%;
        display: flex;
    }
    
    .info-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .path-badge {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem;
        border-radius: var(--radius-md);
    }
    
    .path-badge svg {
        transform: rotate(90deg);
    }
}