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

:root {
    --black:  #0f0f0f;
    --white:  #fafafa;
    --gray:   #6b7280;
    --accent: #1d4ed8;
    --border: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--white);
    color: var(--black);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

nav a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.95rem;
}

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

/* Hero */
.hero {
    padding: 96px 0 80px;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.15rem;
    color: var(--gray);
    max-width: 520px;
}

/* Products */
.products {
    padding: 64px 0 96px;
    border-top: 1px solid var(--border);
}

.products h2 {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gray);
    margin-bottom: 40px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 32px;
}

.product-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-card p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.btn {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
}

.btn:hover { text-decoration: underline; }

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

footer p {
    font-size: 0.9rem;
    color: var(--gray);
}

footer a {
    color: var(--gray);
    text-decoration: none;
}

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