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

body {
    background: #0f0f0f;
    color: #e0e0e0;
    font-family: 'Segoe UI', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
}

.login-title {
    font-size: 1.4rem;
    font-weight: 500;
    color: #fff;
    margin-bottom: 0.25rem;
}

.login-subtitle {
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input {
    width: 100%;
    background: #111;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #fff;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

input:focus {
    border-color: #444;
}

input[readonly] {
    color: #888;
    cursor: default;
}

button {
    width: 100%;
    background: #fff;
    color: #000;
    border: none;
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    margin-top: 1.5rem;
    transition: background 0.2s;
}

button:hover {
    background: #e0e0e0;
}

.error {
    background: #2b0d0d;
    border: 1px solid #991b1b;
    color: #f87171;
    border-radius: 8px;
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    display: none;
}

.error.show {
    display: block;
}