/* Modern Enhanced Theme */
:root {
    /* Enhanced Colors */
    --bg-body: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    --bg-surface: #ffffff;
    --bg-surface-hover: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient-subtle: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 100%);

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --accent-primary: #6366f1;
    --accent-hover: #4f46e5;
    --accent-subtle: #e0e7ff;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    --success-bg: #d1fae5;
    --success-text: #065f46;
    --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);

    --warning-bg: #fef3c7;
    --warning-text: #92400e;
    --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

    --danger-bg: #fee2e2;
    --danger-text: #b91c1c;
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);

    /* Spacing & Layout */
    --sidebar-width: 280px;
    --header-height: 64px;
    --card-radius: 16px;
    --transition-speed: 0.3s;
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Enhanced Shadows */
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.05), 0 1px 2px -1px rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 40px -10px rgb(0 0 0 / 0.15), 0 10px 20px -8px rgb(0 0 0 / 0.08);
    --shadow-glow: 0 0 20px rgb(99 102 241 / 0.3);
}


/* Global Reset & Typography */
html,
body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
}


h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--accent-hover);
}

/* Layout */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-light);
    position: fixed;
    height: 100vh;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.02em;
}

.nav-brand svg {
    color: var(--accent-primary);
    filter: drop-shadow(0 2px 4px rgb(99 102 241 / 0.3));
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.25rem;
    color: var(--text-secondary);
    border-radius: 12px;
    margin-bottom: 0.375rem;
    transition: all var(--transition-speed) var(--transition-bounce);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--accent-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-speed) var(--transition-bounce);
}

.nav-link svg {
    margin-right: 0.875rem;
    color: var(--text-muted);
    transition: all var(--transition-speed);
}

.nav-link:hover {
    background: var(--bg-gradient-subtle);
    color: var(--accent-primary);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.nav-link:hover svg {
    color: var(--accent-primary);
    transform: scale(1.1);
}

.nav-link.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
    font-weight: 600;
}

.nav-link.active::before {
    transform: scaleY(1);
}

.nav-link.active svg {
    color: white;
}

/* Sidebar scrollable content */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    margin-right: -0.5rem;
    padding-right: 0.5rem;
}

.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Sidebar fixed footer */
.sidebar-footer {
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Nav section titles */
.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    /* Match sidebar width */
    padding: 2rem;
    max-width: 1600px;
}

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-speed), transform var(--transition-speed);
}

.card:hover {
    box-shadow: var(--shadow-md);
    /* transform: translateY(-2px); */
    /* Subtle lift on hover */
}

/* Stats Cards */
.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background-color: white;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--text-secondary);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-surface);
    font-size: 0.925rem;
}

.table th {
    background-color: var(--bg-surface-hover);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: var(--bg-body);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
}

.badge-success {
    background-color: var(--success-bg);
    color: var(--success-text);
}

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
}

.badge-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
}

/* Forms */
.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    transition: border-color var(--transition-speed);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

/* Utilities */
.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--text-primary) !important;
}

.text-success {
    color: var(--success-text) !important;
}

.text-warning {
    color: var(--warning-text) !important;
}

.text-danger {
    color: var(--danger-text) !important;
}

.bg-body {
    background-color: var(--bg-body) !important;
}

.bg-surface {
    background-color: var(--bg-surface) !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}