:root {
    --card: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --primary: #0f766e;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
    color: var(--text);
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 2rem;
}

.card {
    width: min(680px, 100%);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

h1 {
    margin: 0 0 0.75rem;
    color: var(--primary);
    font-size: clamp(1.5rem, 2.5vw, 2rem);
}

p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}