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

body {
    min-height: 100vh;
    font-family: 'Segoe UI', Arial, sans-serif;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 3rem;
}

.card {
    width: 320px;
    background: rgba(10, 20, 60, 0.55);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 1rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.card-title {
    color: rgba(255,255,255,0.9);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 0.2rem;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 0.5rem;
    color: #fff;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
}

input::placeholder { color: rgba(255,255,255,0.45); }

input:focus {
    border-color: rgba(255,255,255,0.6);
    background: rgba(255,255,255,0.18);
}

button {
    width: 100%;
    padding: 0.75rem;
    background: rgba(255,255,255,0.92);
    color: #0d1b4b;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.05em;
    transition: background 0.2s;
}

button:hover { background: #fff; }

.error {
    color: #ffcdd2;
    font-size: 0.82rem;
    text-align: center;
    padding: 0.5rem 0.8rem;
    background: rgba(198,40,40,0.3);
    border-radius: 0.4rem;
    border: 1px solid rgba(198,40,40,0.5);
}