:root {
    --brand: #2563eb;
    --dark: #0f172a;
    --muted: #64748b;
    --bg: #f8fafc;
    --white: #ffffff;
}

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

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

nav {
    background: var(--white);
    padding: 1.2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    text-decoration: none;
    color: var(--dark);
    letter-spacing: -1px;
}

.logo span { color: var(--brand); }

.nav-links a {
    margin-left: 2rem;
    text-decoration: none;
    color: var(--muted);
    font-weight: 500;
    transition: 0.3s;
}

.nav-links a:hover, .nav-links a.active { color: var(--brand); }

header {
    padding: 6rem 5%;
    text-align: center;
    background: white;
    border-bottom: 1px solid #e2e8f0;
}

header h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    line-height: 1.1;
}

header p {
    font-size: 1.25rem;
    color: var(--muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.btn {
    background: var(--brand);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: 0.3s;
    border: none;
}

.btn:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.2);
}

.section {
    padding: 5rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid #e2e8f0;
    transition: 0.3s;
}

.card:hover {
    border-color: var(--brand);
    transform: translateY(-5px);
}

.contact-box {
    background: var(--dark);
    color: white;
    padding: 4rem 2rem;
    border-radius: 30px;
    text-align: center;
}

.mail-link {
    font-size: 1.8rem;
    color: var(--brand);
    font-weight: 900;
    text-decoration: none;
    display: block;
    margin-top: 1rem;
}

.form-group { margin-bottom: 1.5rem; text-align: left; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.9rem; border: 1px solid #e2e8f0; border-radius: 10px; font-family: inherit;
}

footer {
    padding: 3rem;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid #e2e8f0;
}