:root {
    --bg: #090d13;
    --card: #131822;
    --border: #212836;
    --text: #f1f5f9;
    --muted: #94a3b8;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 14px;
    width: 100%;
    max-width: 350px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

h2 {
    margin-top: 0;
    font-size: 18px;
    margin-bottom: 20px;
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 14px;
    background: #0b0e14;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: #fff;
    box-sizing: border-box;
}

button {
    width: 100%;
    background: #3b82f6;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
}

button:hover {
    background: #2563eb;
}

.error {
    color: #ef4444;
    font-size: 13px;
    margin-bottom: 10px;
}

.back {
    display: block;
    margin-top: 15px;
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    text-decoration: none;
}

.text-center {
    text-align: center;
}