:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --danger-gradient: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --card-shadow: 0 4px 20px rgba(0,0,0,0.08);
    --hover-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

* {
    transition: all 0.3s ease;
}

body {
    background: linear-gradient(to bottom, #f8f9fa 0%, #e9ecef 100%);
    font-family: 'Segoe UI', Tahoma, Arial, sans-serif;
    min-height: 100vh;
}

.navbar {
    background: var(--primary-gradient) !important;
    box-shadow: 0 2px 15px rgba(102, 126, 234, 0.3);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: white !important;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.2rem;
}

.nav-link:hover {
    background: rgba(255,255,255,0.15);
    color: white !important;
}

.card {
    border: none;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    background: white;
}

.card:hover {
    box-shadow: var(--hover-shadow);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border: none;
    font-weight: 600;
    padding: 1.2rem 1.5rem;
    font-size: 1.1rem;
}

.card-body {
    padding: 1.5rem;
}

.btn {
    border-radius: 10px;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary {
    background: var(--primary-gradient);
}

.btn-success {
    background: var(--success-gradient);
}

.btn-danger {
    background: var(--danger-gradient);
}

.btn-info {
    background: var(--info-gradient);
}

.btn-outline-primary {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

.btn-outline-danger {
    border: 2px solid #ee0979;
    color: #ee0979;
    background: transparent;
}

.btn-outline-danger:hover {
    background: var(--danger-gradient);
    color: white;
    border-color: transparent;
}

.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 0.7rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.15);
}

.table {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.table thead th {
    border: none;
    padding: 1rem;
    font-weight: 600;
}

.table tbody tr {
    background: white;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-color: #f1f3f5;
}

.badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

.badge.bg-success {
    background: var(--success-gradient) !important;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, #868f96 0%, #596164 100%) !important;
}

.modal-content {
    border-radius: 20px;
    border: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.modal-header {
    background: var(--primary-gradient);
    color: white;
    border-radius: 20px 20px 0 0;
    border: none;
    padding: 1.5rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-body {
    padding: 2rem;
}

.alert {
    border-radius: 12px;
    border: none;
    padding: 1rem 1.5rem;
}

.alert-danger {
    background: linear-gradient(135deg, #ff758c 0%, #ff7eb3 100%);
    color: white;
}
.alert-success {
    background: linear-gradient(135deg, #42e695 0%, #3bb2b8 100%);
    color: white;
}