@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #4F46E5; /* Indigo 600 */
    --primary-hover: #4338CA; /* Indigo 700 */
    --bg-body: #FFFFFF;
    --bg-surface: #F9FAFB; /* Gray 50 */
    --text-main: #111827; /* Gray 900 */
    --text-muted: #4B5563; /* Gray 600 */
    --border: #E5E7EB; /* Gray 200 */
    --shadow-sm: 0 1px 2px 0 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);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    color: var(--text-main);
    background-color: var(--bg-body);
    -webkit-font-smoothing: antialiased;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

header .logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.025em;
}

header nav {
    display: flex;
    gap: 24px;
}

header nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 120px 24px 80px;
    max-width: 1000px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 60px;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 24px;
    background: linear-gradient(to right, #111827, #4B5563);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    font-weight: 400;
}

.hero a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: var(--shadow-md);
}

.hero a:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Expertise Section */
.expertise {
    padding: 80px 24px;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.expertise-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.expertise-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.025em;
}

.expertise-content p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Features Grid */
.features {
    padding: 100px 24px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature {
    padding: 32px;
    border-radius: 16px;
    background: white;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.feature:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature img {
    height: 48px;
    margin-bottom: 24px;
}

.feature h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-main);
}

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

/* Footer */
footer {
    padding: 60px 24px;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 40px;
    }
    
    header {
        padding: 16px;
    }
    
    .features {
        grid-template-columns: 1fr;
        padding: 60px 24px;
    }
}