:root {
    /* Color Palette - Modern & Vibrant */
    --primary-hue: 260;
    --primary: hsl(var(--primary-hue), 85%, 60%);
    --primary-light: hsl(var(--primary-hue), 85%, 70%);
    --primary-dark: hsl(var(--primary-hue), 85%, 50%);

    --secondary-hue: 200;
    --secondary: hsl(var(--secondary-hue), 80%, 55%);
    --secondary-light: hsl(var(--secondary-hue), 80%, 65%);

    --success: hsl(145, 70%, 50%);
    --warning: hsl(40, 95%, 55%);
    --danger: hsl(355, 85%, 55%);
    --info: hsl(200, 90%, 60%);

    /* Dark Theme Colors */
    --bg-primary: hsl(230, 20%, 10%);
    --bg-secondary: hsl(230, 18%, 14%);
    --bg-tertiary: hsl(230, 16%, 18%);
    --bg-glass: hsla(230, 20%, 20%, 0.6);
    --bg-glass-hover: hsla(230, 20%, 25%, 0.7);

    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-tertiary: hsl(0, 0%, 50%);

    --border-color: hsla(0, 0%, 100%, 0.1);
    --border-color-hover: hsla(0, 0%, 100%, 0.2);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px hsla(var(--primary-hue), 85%, 60%, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, hsl(230, 20%, 8%) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, hsla(var(--primary-hue), 85%, 60%, 0.1) 0%, transparent 50%);
    animation: rotate 30s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* Glass Card */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

a.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.glass-card:hover {
    border-color: var(--border-color-hover);
    box-shadow: var(--shadow-lg);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2rem;
    color: var(--text-primary);
}

h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), hsl(var(--secondary-hue), 80%, 45%));
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-danger {
    background: linear-gradient(135deg, var(--danger), hsl(355, 85%, 45%));
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-color-hover);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px hsla(var(--primary-hue), 85%, 60%, 0.2);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-checkbox {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
    accent-color: var(--primary);
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-tertiary);
}

th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tbody tr {
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: var(--bg-glass-hover);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

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

.modal-title {
    font-size: 1.75rem;
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

/* Navigation */
.nav {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.nav-item {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
}

.nav-item.active {
    color: var(--primary-light);
    background: var(--bg-tertiary);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

/* Notifications */
.notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideInRight var(--transition-normal);
    max-width: 400px;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

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

.notification-success {
    background: linear-gradient(135deg, var(--success), hsl(145, 70%, 40%));
    color: white;
}

.notification-error {
    background: linear-gradient(135deg, var(--danger), hsl(355, 85%, 45%));
    color: white;
}

.notification-info {
    background: linear-gradient(135deg, var(--info), hsl(200, 90%, 50%));
    color: white;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.login-card {
    max-width: 450px;
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.forgot-password {
    text-align: right;
    margin-top: var(--spacing-sm);
}

.forgot-password a {
    color: var(--primary-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.forgot-password a:hover {
    color: var(--primary);
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.icon-btn {
    padding: var(--spacing-xs);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
    line-height: 1;
}

.icon-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-color: var(--border-color-hover);
}

.icon-btn.edit:hover {
    color: var(--info);
    border-color: var(--info);
}

.icon-btn.delete:hover {
    color: var(--danger);
    border-color: var(--danger);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mt-1 {
    margin-top: var(--spacing-md);
}

.mt-2 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-md);
}

.mb-2 {
    margin-bottom: var(--spacing-lg);
}

.flex {
    display: flex;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gap-1 {
    gap: var(--spacing-md);
}

.gap-2 {
    gap: var(--spacing-lg);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2rem;
    }

    .nav {
        flex-wrap: wrap;
    }

    .dashboard-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .table-container {
        font-size: 0.9rem;
    }

    th,
    td {
        padding: var(--spacing-sm);
    }

    .dashboard-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100% !important;
        position: relative !important;
    }

    .main-content {
        margin-left: 0 !important;
    }
}

/* Sidebar Layout */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-xl);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header img {
    display: block;
    margin: 0 auto;
}

.nav-menu {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.nav-menu .nav-item {
    display: block;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    font-weight: 600;
}

.nav-menu .nav-item:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.nav-menu .nav-item.active {
    background: var(--bg-tertiary);
    color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--spacing-xl);
    max-width: calc(100% - 280px);
}