/* Main Site Styles */
body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Sidebar Styles */
.sidebar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.sidebar.collapsed {
    width: 70px;
}

@media (max-width: 991.98px) {
    .sidebar {
        width: 70px;
    }

    .sidebar:not(.collapsed) {
        width: 220px;
    }

    .main-content {
        margin-left: 70px;
        padding: 1.5rem;
    }

    .main-content:not(.expanded) {
        margin-left: 220px;
    }
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.sidebar-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toggle-sidebar-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    border-radius: 999px;
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, color 0.2s ease;
    flex-shrink: 0;
}

.toggle-sidebar-btn:hover,
.toggle-sidebar-btn:focus {
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.sidebar.collapsed .sidebar-title span {
    display: none;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    padding: 1rem 1.5rem;
    border-radius: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.nav-link .toggle-icon {
    transition: transform 0.2s ease;
    font-size: 0.75rem;
}

.nav-link.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.nav-link:hover, .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white !important;
}

.nav-link i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.sidebar.collapsed .nav-link span {
    display: none;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .nav-link i {
    margin-right: 0;
}

.sidebar.collapsed .nav-item {
    position: relative;
}

.sidebar-submenu {
    background: rgba(255, 255, 255, 0.05);
    margin: 0;
    padding: 0.25rem 0 0.75rem;
    list-style: none;
}

.main-nav {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-submenu .nav-link {
    font-size: 0.9rem;
    padding: 0.6rem 1.5rem 0.6rem 3.25rem;
    color: rgba(255, 255, 255, 0.75) !important;
}

.sidebar-submenu .nav-link:hover,
.sidebar-submenu .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white !important;
}

.sidebar.collapsed .main-nav {
    gap: 0;
}

.sidebar.collapsed .collapse {
    display: none !important;
}

.sidebar.collapsed .collapse.show {
    display: block !important;
    position: absolute;
    top: 0;
    left: 70px;
    min-width: 220px;
    background: #ffffff;
    border-radius: 0 12px 12px 0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
    padding: 0.75rem 0;
    z-index: 1050;
}

.sidebar.collapsed .collapse.show .sidebar-submenu {
    background: transparent;
    padding: 0;
}

.sidebar.collapsed .collapse.show .nav-link {
    color: #212529 !important;
    padding: 0.6rem 1.25rem;
    justify-content: flex-start;
}

.sidebar.collapsed .collapse.show .nav-link span {
    display: inline;
    margin-left: 0.5rem;
}

.sidebar.collapsed .collapse.show .nav-link i {
    margin-right: 0.5rem;
}

.main-content {
    margin-left: 250px;
    transition: all 0.3s ease;
    min-height: 100vh;
    padding: 2rem;
}

.main-content.expanded {
    margin-left: 70px;
}

/* Page Header */
.page-header {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

/* Cards and Tables */
.data-table {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.stats-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    border: none;
    margin-bottom: 2rem;
    transition: transform 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-5px);
}

/* Form Styles */
.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e8ecef;
    padding: 0.75rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* Button Styles */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 0.75rem 2rem;
}

.btn-secondary {
    border-radius: 10px;
    padding: 0.75rem 2rem;
}

/* Modal Styles */
.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0;
}

/* Alert Styles */
.alert {
    border-radius: 12px;
    border: none;
}

/* Search Box */
.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-box input {
    padding-left: 3rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Toggle Button */
.toggle-sidebar {
    background: none;
    border: none;
    color: #495057;
    font-size: 1.2rem;
}

/* Navbar Styles */
.navbar {
    background: white !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}