:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #059669;
    --success-hover: #047857;
    --warning: #d97706;
    --warning-hover: #b45309;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Login */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}
.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 32px;
}
.login-header {
    text-align: center;
    margin-bottom: 24px;
}
.login-icon { font-size: 48px; margin-bottom: 12px; }
.login-header h1 { font-size: 24px; margin-bottom: 4px; }
.login-header p { color: var(--text-muted); font-size: 14px; }

/* Navbar */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
}
.nav-brand { font-size: 18px; font-weight: 700; }
.nav-user { display: flex; align-items: center; gap: 12px; }
.nav-user span { font-size: 14px; color: var(--text-muted); }

/* Container */
.container {
    max-width: 800px;
    margin: 24px auto;
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Card */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 18px; margin-bottom: 2px; }
.card-header p { font-size: 13px; color: var(--text-muted); }
.card-body { padding: 20px 24px; }

/* Form */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}
.form-group input, .form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
    outline: none;
}
.form-group input:focus, .form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    gap: 6px;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: var(--success-hover); }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover:not(:disabled) { background: var(--warning-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: var(--danger-hover); }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { background: var(--bg); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-large {
    flex: 1;
    padding: 16px 24px;
    font-size: 16px;
    min-height: 60px;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 12px;
}

/* Result display */
.result-display {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    background: var(--bg);
    font-size: 14px;
    text-align: center;
    color: var(--text-muted);
    transition: all 0.3s;
}
.result-success { background: #ecfdf5; color: var(--success); font-weight: 600; }
.result-error { background: #fef2f2; color: var(--danger); font-weight: 600; }

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

/* Table */
.table-responsive { overflow-x: auto; }
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.table th {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}
.table tr:hover { background: #f8fafc; }

/* Badge */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-success { background: #ecfdf5; color: var(--success); }
.badge-warning { background: #fffbeb; color: var(--warning); }

/* Filters */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    align-items: end;
}
.filter-group { flex: 1; min-width: 150px; }
.filter-group input, .filter-group select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
}
.filter-group input:focus, .filter-group select:focus {
    border-color: var(--primary);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.page-info { font-size: 13px; color: var(--text-muted); }

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
    max-width: 90%;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }

/* Utilities */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

/* Responsive */
@media (max-width: 600px) {
    .navbar { flex-direction: column; gap: 8px; }
    .action-buttons { flex-direction: column; }
    .filters { flex-direction: column; }
    .filter-group { min-width: 100%; }
}