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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #e2e8f0;
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 1rem;
}

.login-card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

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

.logo h1 {
    font-size: 1.5rem;
    margin-top: 0.75rem;
    color: #f1f5f9;
}

.subtitle {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-top: 0.25rem;
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #cbd5e1;
}

.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 8px;
    color: #f1f5f9;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group label {
    margin-bottom: 0;
    font-size: 0.85rem;
    color: #94a3b8;
}

.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background: #6366f1;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #4f46e5;
}

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

.message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    text-align: center;
    display: none;
}

.message.error {
    display: block;
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.message.success {
    display: block;
    background: rgba(34, 197, 94, 0.15);
    color: #86efac;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.85rem;
}

.footer a {
    color: #6366f1;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer span {
    color: #475569;
    margin: 0 0.5rem;
}