:root {
    /* Primary Color Palette */
    --bs-primary: #0ea5e9;
    --bs-primary-rgb: 14, 165, 233;
    --bs-primary-hover: #0284c7;

    /* Backgrounds & Surfaces (Light) */
    --bs-body-bg: #f8fafc;
    --bs-body-bg-rgb: 248, 250, 252;
    --surface-color: #ffffff;
    --sidebar-bg: #f1f5f9;
    --sidebar-border: #e2e8f0;

    /* Text Colors */
    --bs-body-color: #1e293b;
    --bs-heading-color: #0f172a;
    --text-muted-custom: #64748b;

    /* Typography */
    --bs-font-sans-serif: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Shadows */
    --soft-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.02);
    --hover-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
}

[data-bs-theme="dark"] {
    /* Backgrounds & Surfaces (Dark) */
    --bs-body-bg: #0f172a;
    --bs-body-bg-rgb: 15, 23, 42;
    --surface-color: #1e293b;
    --sidebar-bg: #111827;
    --sidebar-border: #334155;

    /* Text Colors */
    --bs-body-color: #e2e8f0;
    --bs-heading-color: #f8fafc;
    --text-muted-custom: #94a3b8;

    /* Shadows */
    --soft-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
    --hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

/* Dark Mode Overrides */
[data-bs-theme="dark"] .bg-white {
    background-color: var(--surface-color) !important;
}

[data-bs-theme="dark"] .bg-light {
    background-color: #1e293b !important;
}

[data-bs-theme="dark"] .text-dark {
    color: var(--bs-heading-color) !important;
}

[data-bs-theme="dark"] .text-muted {
    color: var(--text-muted-custom) !important;
}

[data-bs-theme="dark"] .border-bottom,
[data-bs-theme="dark"] .border-end,
[data-bs-theme="dark"] .border-top,
[data-bs-theme="dark"] .border-start,
[data-bs-theme="dark"] .border {
    border-color: #334155 !important;
}

[data-bs-theme="dark"] .table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--bs-body-color);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.04);
}

[data-bs-theme="dark"] .table th {
    color: #94a3b8 !important;
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background-color: #0f172a !important;
    color: var(--bs-body-color) !important;
    border-color: #334155 !important;
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background-color: #0f172a !important;
    color: var(--bs-heading-color) !important;
    border-color: var(--bs-primary) !important;
}

/* Fix Autofill in Dark Mode */
[data-bs-theme="dark"] input:-webkit-autofill,
[data-bs-theme="dark"] input:-webkit-autofill:hover,
[data-bs-theme="dark"] input:-webkit-autofill:focus,
[data-bs-theme="dark"] input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px #0f172a inset !important;
    -webkit-text-fill-color: #e2e8f0 !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Base Elements */
html {
    font-size: 14.5px;
}

body {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    font-family: var(--bs-font-sans-serif);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* Cards & Containers */
.card {
    background: var(--surface-color);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 16px;
    box-shadow: var(--soft-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

[data-bs-theme="dark"] .card {
    border-color: rgba(51, 65, 85, 0.8);
}

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

/* Buttons */
.btn-primary {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(14, 165, 233, 0.3);
    border-radius: 8px;
    padding: 0.55rem 1.25rem;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--bs-primary-hover);
    border-color: var(--bs-primary-hover);
    box-shadow: 0 4px 6px rgba(14, 165, 233, 0.4);
    transform: translateY(-1px);
}

/* Inputs */
.form-control,
.form-select {
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    padding: 0.6rem 1rem;
    background-color: #f8fafc;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.25rem rgba(14, 165, 233, 0.2);
    background-color: #ffffff;
}

/* Sidebar Custom Styling */
.app-sidebar {
    width: 260px;
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
}

.nav-link-custom {
    color: var(--bs-body-color);
    border-radius: 10px;
    padding: 0.65rem 1rem;
    font-weight: 500;
    transition: all 0.15s ease-in-out;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.nav-link-custom:hover {
    background-color: rgba(14, 165, 233, 0.08);
    color: var(--bs-primary);
}

.nav-link-custom.active {
    background-color: var(--bs-primary) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

/* Stat Cards */
.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Avatar Placeholder */
.avatar-circle {
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    object-fit: cover;
}