:root {
    --primary-color: #000000;
    --secondary-color: #ffffff;
    --accent-color: #3b82f6;
    --text-main: #111827;
    --text-muted: #6b7280;
    --bg-main: #e2e2e2;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --radius: 16px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    padding-top: 4rem !important; /* space for the top nav header */
    min-height: 100vh !important;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.9) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.625rem 0 !important;
}

.navbar-brand img {
    height: 28px;
    width: auto;
}

.navbar-brand {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-link {
    color: var(--text-main) !important;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 0.875rem !important;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--text-main) !important;
}

.dropdown-menu {
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.12);
    padding: 0.5rem;
    margin-top: 0.5rem !important;
}

.dropdown-item {
    border-radius: 8px;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    transition: var(--transition);
}

/*.dropdown-item:hover {
    color: var(--bs-dropdown-link-active-color);
    background-color: var(--bs-dropdown-link-active-bg);
}
*/

.nav-link,
.dropdown-item,
.dropdown-toggle,
.btn {
    cursor: pointer;
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: var(--transition);
    background: var(--card-bg);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
    border-color: #d1d5db;
}

.card-body {
    padding: 1rem;
}

.card-header {
    border-bottom-color: var(--border-color);
    padding: 1rem 1.5rem;
    background: transparent;
}

/* Buttons */
.btn {
    border-radius: 10px;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
    border: 1px solid transparent;
    letter-spacing: 0;
}

.btn.disabled {
    border-color: transparent;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-primary:hover {
    background-color: #1f2937;
    border-color: #1f2937;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-outline-dark {
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-outline-dark:hover {
    background-color: var(--text-main);
    border-color: var(--text-main);
    color: white;
}

/* Form Controls */
.form-control,
.form-select {
    border-radius: 10px;
    padding: 0.625rem 1rem;
    border-color: var(--border-color);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Dashboard Grid - Single row */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 1rem 0;
}

@media (max-width: 991px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Hero Section */
.display-5 {
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

/* Typography */
h1, h2, h3, h4, h5 {
    font-weight: 800;
    letter-spacing: -0.03em;
}

.lead {
    font-size: 1.15rem;
    line-height: 1.6;
}

/* Mobile Optimizations */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background: white;
        padding: 1.5rem;
        border-radius: 20px;
        margin-top: 1rem;
        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        border: 1px solid var(--border-color);
    }
    
    .nav-item {
        margin-bottom: 0.5rem;
    }
    
    .nav-link {
        padding: 0.8rem 1rem !important;
    }
    
    .display-5 {
        font-size: 2.5rem;
    }
}

@media (max-width: 767.98px) {
    body {
        padding-top: 70px !important;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }
    
    .btn-lg {
        width: 100%;
        margin-top: 1rem;
    }
    
    .badge {
        font-size: 0.75rem;
    }
}

/* Utils */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.max-w-700 { max-width: 700px; }

/* Badges */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.35em 0.65em;
    border-radius: 6px;
}

/* Section Spacing */
section {
    margin-bottom: 2rem;
}

.container {
    max-width: 1200px;
}

/* Table improvements */
.table > :not(caption) > * > * {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
}

.table-light {
    --bs-table-bg: #fafafa;
}

/* Modal improvements */
.modal-content {
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.modal-header {
    border-bottom-color: var(--border-color);
    padding: 1.25rem 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top-color: var(--border-color);
    padding: 1rem 1.5rem;
}

/* Tabs */
.nav-tabs .nav-link {
    border: none;
    color: var(--text-muted);
    border-radius: 8px 8px 0 0;
    padding: 0.75rem 1rem;
}

.nav-tabs .nav-link.active {
    background: var(--card-bg);
    color: var(--text-main);
    border-bottom: 2px solid var(--primary-color);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* additional font size */
.fs-05 {
    font-size: 0.5rem;
}

.fs-06 {
    font-size: 0.6rem;
}

.fs-07 {
    font-size: 0.7rem;
}

.fs-08 {
    font-size: 0.8rem;
}

.fs-09 {
    font-size: 0.9rem;
}

/* Bootstrap fix for invalid-feedback inside input-group */
.was-validated .form-check:has(:invalid) .invalid-feedback {
    display: block;
}
.was-validated .form-check:not(:has(:invalid)) .valid-feedback {
    display: block;
}