:root {
    --bg: #1b1d22;
    --panel: #262930;
    --panel-2: #2f333c;
    --border: #3a3f4b;
    --text: #e7e9ec;
    --muted: #9aa0ac;
    --accent: #4da3ff;
    --danger: #ff5a5a;
    --radius: 10px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
h2 {
    margin-bottom: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
}
form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 280px;
    background: var(--panel);
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
input {
    padding: 10px 12px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    height: auto;
    transition: border-color 0.15s ease;
}
input:focus {
    outline: none;
    border-color: var(--accent);
}
input::placeholder { color: var(--muted); }
button {
    padding: 10px;
    height: auto;
    background: var(--accent);
    color: #0a1220;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.15s ease;
}
button:hover { filter: brightness(1.08); }
#error {
    color: var(--danger);
    margin: 0;
    font-size: 13px;
}