:root {
    --primary: #005a9c;
    --danger: #dc2626;
    --bg: #f4f6f9;
    --card-bg: #ffffff;
    --text: #1f2937;
    --border: #cbd5e1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
}

.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    background: var(--card-bg);
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 380px;
    text-align: center;
}

.login-card img {
    max-width: 120px;
    margin-bottom: 15px;
}

.login-card h2 {
    color: var(--primary);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.login-card .form-group {
    margin-bottom: 15px;
    text-align: left;
}

.login-card label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.85rem;
    font-weight: 600;
}

.login-card input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    box-sizing: border-box;
}

.btn-login {
    background-color: var(--primary);
    color: white;
    border: none;
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
    transition: background 0.2s;
}

.btn-login:hover {
    background-color: #004070;
}

.btn-login:disabled {
    background-color: #94a3b8;
    cursor: not-allowed;
}

.login-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 10px;
    display: none;
}