:root {
    --bg: #0b0f17;
    --card: #111827;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #22d3ee;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: var(--bg);
    color: var(--text);
}

.container {
    display: grid;
    min-height: 100vh;
    grid-template-rows:auto 1fr auto;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0;
}

.card {
    background: var(--card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
}

.card h2 {
    margin-top: 0;
}

input {
    width: 100%;
    padding: .9rem 1rem;
    border-radius: 12px;
    border: 1px solid #1f2937;
    background: #0b1220;
    color: var(--text);
    margin-bottom: .75rem;
}

button {
    width: 100%;
    padding: .9rem 1rem;
    border: none;
    border-radius: 12px;
    background: var(--accent);
    color: #001018;
    font-weight: 800;
    cursor: pointer;
}

button:hover {
    filter: brightness(1.1);
}

footer {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--muted);
}

.muted {
    color: var(--muted);
}