body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg), var(--sidebar-bg));
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 40px 30px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid var(--border);
    text-align: center;
}

.login-container h2 {
    color: var(--secondary);
    margin-bottom: 30px;
    font-size: 2rem;
    letter-spacing: 2px;
}

.login-container input {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg);
    font-size: 1rem;
    transition: border-color 0.3s;
}
.login-container input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

.login-container button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.login-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(46,204,113,0.3);
}

#error {
    color: var(--offline);
    margin-top: 15px;
    font-size: 0.95rem;
}