@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-color: #f1f5f9;
    --text-color: #1e293b;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.8);
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --sidebar-bg: #ffffff;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --font-family: 'Outfit', sans-serif;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.05);
    --accent-color: #60a5fa;
    --accent-hover: #3b82f6;
    --sidebar-bg: #1e293b;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

/* Glassmorphism utility */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow);
    z-index: 100;
    transition: background-color 0.4s ease, transform 0.3s ease;
}

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--accent-color);
    letter-spacing: -0.5px;
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-color);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.nav-item:hover {
    opacity: 1;
    background: rgba(59, 130, 246, 0.05);
    color: var(--accent-color);
}

.nav-item.active {
    opacity: 1;
    background: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2.5rem 3rem;
    transition: margin-left 0.3s ease;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-color);
    padding: 0.7rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Views */
.view-section {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Cards Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.card {
    border-radius: 20px;
    padding: 1.8rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-title {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-color);
    line-height: 1.1;
}

/* Forms & Tables */
.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.95rem;
}

.form-control {
    padding: 1rem 1.2rem;
    border-radius: 12px;
    border: 2px solid rgba(150, 150, 150, 0.2);
    background: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    background: var(--accent-color);
    color: #fff;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background: var(--accent-color);
    color: #fff;
}

.table-container {
    width: 100%;
    overflow-x: auto;
    border-radius: 16px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
}

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

table th, table td {
    padding: 1.2rem;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

table th {
    font-weight: 600;
    opacity: 0.8;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

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

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); width: 250px; }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 1.5rem; }
    .dashboard-grid { grid-template-columns: 1fr; }
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    width: 90%;
    max-width: 450px;
    padding: 2rem;
    border-radius: 24px;
    box-shadow: var(--shadow-hover);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}