:root {
    --bg: #f0f2f5;
    --sidebar-bg: #1e1b4b;
    --sidebar-text: #c7d2fe;
    --sidebar-active: #4f46e5;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --green: #059669;
    --blue: #0284c7;
    --purple: #7c3aed;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand-icon { font-size: 1.5rem; }
.brand-text { font-size: 1.15rem; font-weight: 700; color: #fff; }

.nav-links { list-style: none; padding: 1rem 0; flex: 1; }

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.15s;
    font-size: 0.95rem;
}

.nav-links a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-links a.active {
    background: rgba(79, 70, 229, 0.3);
    color: #fff;
    border-right: 3px solid var(--sidebar-active);
}

.nav-icon { font-size: 1.1rem; width: 1.5rem; text-align: center; }

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.4);
}

/* Content */
.content {
    margin-left: 240px;
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-header h1 { font-size: 1.75rem; font-weight: 700; }
.page-header-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.page-description { color: var(--text-muted); margin-bottom: 1.5rem; }

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem 1.5rem;
    border-left: 4px solid var(--primary);
}

.stat-card.accent-blue { border-left-color: var(--blue); }
.stat-card.accent-green { border-left-color: var(--green); }
.stat-card.accent-purple { border-left-color: var(--purple); }

.stat-value { font-size: 2rem; font-weight: 700; line-height: 1.2; }
.stat-label { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.25rem; }

/* Grid layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.chart-card canvas { max-height: 300px; }
.chart-card.wide { grid-column: 1 / -1; }
.chart-card.wide canvas { max-height: 350px; }

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 2px solid var(--border);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.data-table td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.data-table tr:hover { background: #f8fafc; }
.data-table a { color: var(--primary); text-decoration: none; font-weight: 500; }
.data-table a:hover { text-decoration: underline; }

.table-responsive { overflow-x: auto; }

/* Badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    background: #eef2ff;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-green { background: #ecfdf5; color: var(--green); }

.status-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: capitalize;
}

.status-active { background: #ecfdf5; color: var(--green); }
.status-inactive { background: #fef2f2; color: #dc2626; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #e2e8f0; color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }
.btn-block { width: 100%; text-align: center; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.table-actions { display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap; }
.inline-rename { display: flex; gap: 0.5rem; align-items: center; }
.inline-rename .form-control { max-width: 260px; }

.logout-link {
    display: block;
    margin-top: 0.35rem;
    color: #c7d2fe;
    text-decoration: none;
    font-size: 0.85rem;
}
.logout-link:hover { color: #fff; }

.flash-messages { margin-bottom: 1.25rem; }
.flash {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}
.flash-success { background: #ecfdf5; color: var(--green); }
.flash-error { background: #fef2f2; color: #dc2626; }
.flash-warning { background: #fffbeb; color: #d97706; }
.flash-info, .flash-message { background: #eef2ff; color: var(--primary); }

.form-control, textarea.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    background: var(--card-bg);
    font-family: inherit;
    color: var(--text);
}
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; flex-wrap: wrap; }
.admin-form .form-group { margin-bottom: 0.85rem; }
.nested-form {
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(160deg, #1e1b4b 0%, #312e81 100%);
}
.login-card {
    width: 100%;
    max-width: 400px;
    background: #fff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}
.login-brand { text-align: center; margin-bottom: 1.5rem; }
.login-brand h1 { font-size: 1.5rem; margin: 0.35rem 0 0.15rem; }
.login-brand p { color: var(--text-muted); font-size: 0.9rem; }
.login-form .form-group { margin-bottom: 1rem; }
.login-hint, .login-back { text-align: center; margin-top: 1rem; font-size: 0.85rem; color: var(--text-muted); }
.login-back a { color: var(--primary); text-decoration: none; }

/* Filters */
.filters-bar { margin-bottom: 1.5rem; }

.filters-form {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

.search-input, .filters-form select, .form-group select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    background: var(--card-bg);
}

.search-input { flex: 1; min-width: 200px; }

.results-count { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 0.75rem; }
.empty-state { color: var(--text-muted); padding: 2rem; text-align: center; }

/* Employee detail */
.employee-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1.5rem; }
.employee-info { display: flex; gap: 1.25rem; align-items: center; }
.employee-avatar {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; font-weight: 700;
}
.text-muted { color: var(--text-muted); }
.employee-stats { display: flex; gap: 2rem; }
.mini-stat { text-align: center; }
.mini-stat-value { font-size: 1.5rem; font-weight: 700; }
.mini-stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* Quick links */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.quick-link-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text);
    transition: transform 0.15s, box-shadow 0.15s;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.quick-link-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.ql-icon { font-size: 1.5rem; }
.ql-title { font-weight: 700; font-size: 1rem; }
.ql-desc { color: var(--text-muted); font-size: 0.85rem; }

/* Reports */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.report-card h2 { font-size: 1rem; }
.form-group { margin-bottom: 0.75rem; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.form-group select { width: 100%; }
.export-buttons { display: flex; gap: 0.5rem; margin-top: 1rem; }

@media (max-width: 900px) {
    .sidebar { width: 60px; }
    .brand-text, .nav-links span:not(.nav-icon), .sidebar-footer { display: none; }
    .content { margin-left: 60px; padding: 1rem; }
    .grid-2, .charts-grid, .form-grid { grid-template-columns: 1fr; }
}