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

:root {
    --primary-600: #2563EB;
    --primary-500: #3B82F6;
    --bg: #F8FAFC;
    --surface: #FFFFFF;
    --border: #E2E8F0;
    --muted-900: #0F172A;
    --muted-600: #334155;
    --muted-500: #64748B;
    --danger: #DC2626;
    --radius: 8px;
    --shadow: 0 6px 18px rgba(15,23,42,0.06);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 48px;
    width: 100%;
    max-width: 420px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-size: 28px;
    color: var(--muted-900);
    margin-bottom: 8px;
    font-weight: 700;
}

.login-header p {
    color: var(--muted-600);
    font-size: 14px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted-900);
    font-weight: 500;
    font-size: 14px;
}

.alert-danger {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 14px;
    border: 1px solid #FCA5A5;
    background: #FEE2E2;
    color: var(--danger);
    display: flex;
    align-items: center;
    gap: 10px;
}