:root {
    /* Vibrant Dark Theme Palette */
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #020617;
    
    --primary: #06b6d4; /* Cyan 500 */
    --primary-hover: #22d3ee; /* Cyan 400 */
    --secondary: #8b5cf6; /* Violet 500 */
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --border: #334155;
    
    --success: #10b981;
    --danger: #ef4444;
    
    --gradient-main: linear-gradient(135deg, var(--primary), var(--secondary));
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 15px rgba(6, 182, 212, 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
    transition: all 0.2s ease;
}

#app {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 3rem;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-header .logo i {
    font-size: 2rem;
    color: var(--primary);
    -webkit-text-fill-color: var(--primary);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 1rem;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-btn.active {
    background: var(--gradient-main);
    color: white;
    box-shadow: var(--shadow-glow);
}

.nav-btn i {
    font-size: 1.25rem;
}

/* Main Content */
#main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-bar {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
}

#page-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

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

.btn-icon {
    padding: 0.5rem;
    border-radius: 0.375rem;
    color: var(--text-muted);
}

.btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Grid */
.grid-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.grid-table th {
    text-align: left;
    padding: 1rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
}

.grid-table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
}

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

.grid-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

.actions-cell {
    display: flex;
    gap: 0.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

.modal-backdrop.hidden {
    display: none;
}

.modal {
    background-color: var(--bg-card);
    width: 100%;
    max-width: 500px;
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.3);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-backdrop.visible .modal {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    background-color: var(--bg-body);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

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

.btn-ghost:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05);
}