:root {
    /* Color Palette - Modern Professional */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;

    /* Backgrounds */
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-sidebar: #1e293b;

    /* Text */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-on-dark: #f8fafc;

    /* Borders */
    --border-color: #e2e8f0;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.05), 0 10px 10px -5px rgb(0 0 0 / 0.05);

    /* Spacing - Compact & Designed */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2.5rem;

    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

h1 {
    font-size: 1.875rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

.text-xs {
    font-size: 0.75rem;
}

.text-sm {
    font-size: 0.875rem;
}

.text-base {
    font-size: 1rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.text-2xl {
    font-size: 1.5rem;
}

.text-3xl {
    font-size: 1.875rem;
}

.text-4xl {
    font-size: 2.25rem;
}

.text-5xl {
    font-size: 3rem;
}

.font-normal {
    font-weight: 400;
}

.font-bold {
    font-weight: 700;
}

.font-extrabold {
    font-weight: 800;
}

.uppercase {
    text-transform: uppercase;
}

.tracking-tight {
    letter-spacing: -0.025em;
}

.tracking-wider {
    letter-spacing: 0.05em;
}

.tracking-widest {
    letter-spacing: 0.1em;
}

/* Colors */
.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-muted {
    color: var(--text-muted);
}

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

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

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

.text-info {
    color: var(--info-color);
}

.text-white {
    color: #ffffff;
}

.text-blue-100 {
    color: #dbeafe;
}

.text-blue-200 {
    color: #bfdbfe;
}

.text-blue-400 {
    color: #60a5fa;
}

.text-blue-600 {
    color: #2563eb;
}

.text-purple-600 {
    color: #9333ea;
}

.text-green-400 {
    color: #4ade80;
}

.text-gray-400 {
    color: #9ca3af;
}

.text-gray-600 {
    color: #4b5563;
}

.text-gray-700 {
    color: #374151;
}

.text-gray-800 {
    color: #1f2937;
}

.text-yellow-700 {
    color: #a16207;
}

.text-yellow-800 {
    color: #854d0e;
}

.bg-white {
    background-color: #ffffff;
}

.bg-gray-50 {
    background-color: #f9fafb;
}

.bg-gray-100 {
    background-color: #f3f4f6;
}

.bg-gray-200 {
    background-color: #e5e7eb;
}

.bg-primary {
    background-color: var(--primary-color);
}

.bg-blue-50 {
    background-color: #eff6ff;
}

.bg-green-50 {
    background-color: #f0fdf4;
}

.bg-green-100 {
    background-color: #dcfce7;
}

.bg-green-200 {
    background-color: #bbf7d0;
}

.bg-green-500 {
    background-color: #22c55e;
}

.bg-yellow-50 {
    background-color: #fefce8;
}

.bg-red-50 {
    background-color: #fef2f2;
}

.bg-purple-100 {
    background-color: #f3e8ff;
}

.bg-gray-900 {
    background-color: #111827;
}

/* Layout */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1 1 0%;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-baseline {
    align-items: baseline;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.justify-end {
    justify-content: flex-end;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.75rem;
}

.gap-4 {
    gap: 1rem;
}

.gap-6 {
    gap: 1.5rem;
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.sm\:grid-cols-2 {}

/* handled in media query */
.lg\:col-span-1 {}

.lg\:col-span-2 {}

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

.h-1\.5 {
    height: 0.375rem;
}

.h-8 {
    height: 2rem;
}

.h-12 {
    height: 3rem;
}

.h-32 {
    height: 8rem;
}

.w-8 {
    width: 2rem;
}

.w-12 {
    width: 3rem;
}

.w-10 {
    width: 2.5rem;
}

.h-10 {
    height: 2.5rem;
}

.m-0 {
    margin: 0;
}

.mt-1 {
    margin-top: 0.25rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.ml-1 {
    margin-left: 0.25rem;
}

.ml-2 {
    margin-left: 0.5rem;
}

.mr-1 {
    margin-right: 0.25rem;
}

.mr-2 {
    margin-right: 0.5rem;
}

.mb-0 {
    margin-bottom: 0px;
}

.mb-0\.5 {
    margin-bottom: 0.125rem;
}

.mb-1 {
    margin-bottom: 0.25rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-3 {
    margin-bottom: 0.75rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.p-3 {
    padding: 0.75rem;
}

.p-4 {
    padding: 1rem;
}

.p-5 {
    padding: 1.25rem;
}

.p-md {
    padding: var(--spacing-md);
}

.pb-3 {
    padding-bottom: 0.75rem;
}

.pt-4 {
    padding-top: 1rem;
}

.px-2 {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

.py-0\.5 {
    padding-top: 0.125rem;
    padding-bottom: 0.125rem;
}

.py-1 {
    padding-top: 0.25rem;
    padding-bottom: 0.25rem;
}

.hidden {
    display: none !important;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.top-1 {
    top: 0.25rem;
}

.right-1 {
    right: 0.25rem;
}

.right-2 {
    right: 0.5rem;
}

.-bottom-4 {
    bottom: -1rem;
}

.-right-2 {
    right: -0.5rem;
}

/* Components */
.card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.card-header {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background-color: #f8fafc;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
}

.btn-xs {
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: transparent;
    cursor: pointer;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-warning {
    background-color: #fef3c7;
    color: #b45309;
}

.badge-info {
    background-color: #e0f2fe;
    color: #0369a1;
}

.badge-success {
    background-color: #dcfce7;
    color: #15803d;
}

.top-nav {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    height: 72px;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

.nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.user-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

.layout-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.login-page {
    background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.role-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.role-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    background: white;
}

.role-btn:hover,
.role-btn.active {
    border-color: var(--primary-color);
    background-color: #eff6ff;
    color: var(--primary-color);
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    margin-top: 0.25rem;
}

.btn-block {
    width: 100%;
}

/* Borders specific */
.border-l-4 {
    border-left-width: 4px;
    border-style: solid;
}

.border-t-4 {
    border-top-width: 4px;
    border-style: solid;
}

.border-dashed {
    border-style: dashed;
}

.border-white\/10 {
    border-color: rgba(255, 255, 255, 0.1);
}

.border-red-100 {
    border-color: #fee2e2;
}

.border-yellow-100 {
    border-color: #fef9c3;
}

.border-green-100 {
    border-color: #dcfce7;
}

.border-blue-100 {
    border-color: #dbeafe;
}

/* Responsive Grid Overrides */
@media (min-width: 640px) {
    .sm\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .md\:block {
        display: block;
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .lg\:col-span-1 {
        grid-column: span 1 / span 1;
    }

    .lg\:col-span-2 {
        grid-column: span 2 / span 2;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}