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

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --sidebar-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    padding: 24px;
    z-index: 1000;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 1.1rem;
}

.brand-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-link:hover {
    background: #f1f5f9;
    color: var(--text-main);
}

.nav-link.active {
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
}

/* Page Layout */
.main-wrapper {
    margin-left: 260px;
    padding: 32px 40px;
    min-height: 100vh;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.04);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Chart Container */
.chart-container {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 32px;
    position: relative;
    max-height: 450px; /* Prevent huge scrolling */
}

/* Table Wrapper */
.table-wrapper {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

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

.custom-table th {
    background: #f8fafc;
    padding: 14px 20px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
}

.custom-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.custom-table tr:last-child td { border-bottom: none; }
.custom-table tr:hover td { background: #fdfdfd; }

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.75rem;
}

.badge-primary { background: #e0e7ff; color: #4338ca; }
.badge-success { background: #dcfce7; color: #15803d; }
.badge-danger { background: #fee2e2; color: #b91c1c; }

/* Buttons */
.btn-premium {
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-premium:hover { 
    background: var(--primary-hover); 
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); 
}

.btn-icon-only {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    background: white;
    border-radius: 8px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.btn-icon-only:hover { background: #f8fafc; color: var(--text-main); }

/* Forms */
.form-input-custom {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    color: var(--text-main);
    font-size: 0.875rem;
}

.form-input-custom:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Modals */
.modal-content-custom {
    border-radius: 16px;
    border: none;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.modal-header-custom {
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

.modal-body-custom {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

/* Utility */
.x-small { font-size: 0.75rem; }
.text-white { color: white !important; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* Mobile */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-wrapper { margin-left: 0; padding: 20px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 16px; }
}