* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.login-card {
    background: #ffffff;
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header .icon {
    font-size: 3rem;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.login-header h2 {
    color: #111827;
    font-size: 1.6rem;
    font-weight: 700;
}

.login-header p {
    color: #6b7280;
    font-size: 0.95rem;
    margin-top: 0.3rem;
}

.alert-error {
    background: #fee2e2;
    border-left: 4px solid #ef4444;
    color: #991b1b;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    color: #374151;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #a67c52;
    box-shadow: 0 0 0 3px rgba(166, 124, 82, 0.2);
}

.btn-submit {
    width: 100%;
    background: #a67c52;
    color: #ffffff;
    border: none;
    padding: 0.85rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn-submit:hover {
    background: #8c6643;
}

.btn-submit:active {
    transform: scale(0.99);
}

.login-footer {
    margin-top: 2rem;
    text-align: center;
    background: #f9fafb;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    color: #4b5563;
}

.login-footer code {
    background: #e5e7eb;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
}