:root {
  /* Professional white + blue theme */
  --bg: #eef2f9;       /* page background — soft blue-grey */
  --bg2: #f6f8fc;      /* sidebar, topbar, table headers */
  --card: #ffffff;     /* cards, nav hover — pure white */
  --card2: #eaf1fe;    /* row/secondary hover — light blue tint */
  --border: #dbe3ef;   /* standard borders */
  --border2: #b9c7db;  /* stronger borders */
  --text: #1e293b;     /* primary text — dark slate */
  --muted: #64748b;    /* secondary text */
  --muted2: #94a3b8;   /* tertiary / section labels */
  --accent: #2563eb;   /* primary blue */
  --accent2: #1d4ed8;  /* blue hover / darker */
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --purple: #7c3aed;
  --teal: #0d9488;
  --pink: #db2777;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }
a { text-decoration: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 14px; }
table { border-collapse: collapse; width: 100%; }

/* Layout */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--bg2); border-right: 1px solid var(--border); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; overflow-y: auto; z-index: 100; box-shadow: 1px 0 3px rgba(30,41,59,.04); }
.main-content { margin-left: 240px; flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar { background: var(--bg2); border-bottom: 1px solid var(--border); padding: 0 24px; height: 60px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 50; box-shadow: 0 1px 3px rgba(30,41,59,.04); }
.page-content { padding: 28px 28px; flex: 1; }

/* Sidebar */
.sidebar-brand { padding: 16px 20px 14px; border-bottom: 1px solid var(--border); text-align: center; overflow: hidden; flex-shrink: 0; }.sidebar-brand .company { font-size: 11px; color: var(--muted); margin-top: 2px; }
.sidebar-logo { display: block; width: 262px; max-width: none; height: auto; margin: -62px 0 -94px -29px; mix-blend-mode: multiply; }.nav-section { padding: 8px 16px 4px; font-size: 10px; font-weight: 700; color: var(--muted2); text-transform: uppercase; letter-spacing: .8px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 20px; color: var(--muted); font-size: 13.5px; cursor: pointer; transition: .15s; border-left: 3px solid transparent; }
.nav-item:hover { background: var(--card); color: var(--text); }
.nav-item.active { background: var(--card); color: var(--accent); border-left-color: var(--accent); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); margin-top: auto; }
.user-info { display: flex; align-items: center; gap: 10px; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; color: #fff; flex-shrink: 0; }
.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: var(--muted); text-transform: capitalize; }

/* Topbar */
.page-title { font-size: 18px; font-weight: 700; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn { padding: 8px 16px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--text); cursor: pointer; font-size: 13px; font-weight: 500; transition: .15s; display: inline-flex; align-items: center; gap: 6px; }
.btn:hover { background: var(--card2); border-color: var(--border2); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 1px 2px rgba(37,99,235,.25); }
.btn-primary:hover { background: var(--accent2); }
.btn-danger { background: #ef44441a; color: var(--red); border-color: #ef444433; }
.btn-danger:hover { background: #ef444433; }
.btn-success { background: #22c55e1a; color: var(--green); border-color: #22c55e33; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Cards */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; box-shadow: 0 1px 3px rgba(30,41,59,.06); }
.card-title { font-size: 15px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; box-shadow: 0 1px 3px rgba(30,41,59,.06); }
.stat-label { font-size: 12px; color: var(--muted); font-weight: 500; margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 800; line-height: 1; }
.stat-sub { font-size: 12px; color: var(--muted); margin-top: 6px; }
.stat-card.blue .stat-value { color: var(--accent); }
.stat-card.green .stat-value { color: var(--green); }
.stat-card.red .stat-value { color: var(--red); }
.stat-card.amber .stat-value { color: var(--amber); }
.stat-card.purple .stat-value { color: var(--purple); }
.stat-card.teal .stat-value { color: var(--teal); }

/* Tables */
.table-wrap { overflow-x: auto; }
th { background: var(--bg2); padding: 10px 14px; text-align: left; font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
td { padding: 11px 14px; border-bottom: 1px solid var(--border); font-size: 13px; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--card2); }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-green { background: #22c55e22; color: var(--green); }
.badge-red { background: #ef444422; color: var(--red); }
.badge-amber { background: #f59e0b22; color: var(--amber); }
.badge-blue { background: #3b82f622; color: var(--accent); }
.badge-purple { background: #a78bfa22; color: var(--purple); }
.badge-teal { background: #14b8a622; color: var(--teal); }
.badge-gray { background: #8899aa22; color: var(--muted); }

/* Forms */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 12px; color: var(--muted); font-weight: 600; }
.form-control { padding: 9px 12px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); outline: none; transition: .15s; width: 100%; }
.form-control:focus { border-color: var(--accent); }
.form-control.full { grid-column: 1 / -1; }

/* Modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 200; display: none; align-items: center; justify-content: center; }
.modal-bg.open { display: flex; }
.modal { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; width: 90%; max-width: 640px; max-height: 90vh; overflow-y: auto; box-shadow: 0 24px 64px rgba(30,41,59,.18); }
.modal-title { font-size: 17px; font-weight: 700; margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; }
.modal-close { cursor: pointer; color: var(--muted); font-size: 22px; background: none; border: none; color: var(--muted); }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }

/* Alert */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }
.alert-success { background: #22c55e15; border: 1px solid #22c55e33; color: var(--green); }
.alert-danger { background: #ef444415; border: 1px solid #ef444433; color: var(--red); }
.alert-info { background: #3b82f615; border: 1px solid #3b82f633; color: var(--accent); }

/* Misc */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.text-muted { color: var(--muted); }
.text-right { text-align: right; }
.fw-bold { font-weight: 700; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 4px; background: var(--accent); }
/* ── Mobile menu toggle (hamburger) + overlay — injected by main.js ── */
.menu-toggle { display: none; align-items: center; justify-content: center; width: 40px; height: 40px; margin-right: 6px; border: 1px solid var(--border); background: var(--card); border-radius: 8px; cursor: pointer; color: var(--text); flex-shrink: 0; }
.menu-toggle:hover { background: var(--card2); }
.menu-toggle svg { width: 20px; height: 20px; }
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(15,23,42,.45); z-index: 99; opacity: 0; transition: opacity .2s; }
.sidebar > a[href*="logout.php"] { margin: 0 20px 16px; flex-shrink: 0; }
.sidebar-overlay.open { display: block; opacity: 1; }

/* Prevent any stray wide element from scrolling the whole page sideways.
   `clip` (unlike hidden) does not create a scroll container, so the sticky
   topbar and fixed sidebar keep working. `.table-wrap` scrolls internally. */
html, body { overflow-x: hidden; overflow-x: clip; max-width: 100%; }
.main-content, .page-content, .topbar { max-width: 100%; min-width: 0; }

/* ── Responsive breakpoints ── */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); transition: transform .25s ease; box-shadow: 2px 0 16px rgba(15,23,42,.18); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .menu-toggle { display: inline-flex; }
  .topbar { padding: 0 14px; gap: 10px; }
  .page-content { padding: 18px 14px; }
  .page-title { font-size: 16px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .modal { padding: 20px; width: 94%; max-height: 92vh; }
  .modal-footer { flex-wrap: wrap; }
}
@media (max-width: 640px) {
  body { font-size: 13.5px; }
  .stat-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 16px; }
  .stat-value { font-size: 22px; }
  .card { padding: 16px; border-radius: 10px; }
  .topbar-right { gap: 8px; }
  .topbar-right .btn { padding: 7px 10px; font-size: 12px; }
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .table-wrap table { min-width: 560px; }
  th, td { padding: 9px 10px; }
  .modal-footer .btn { flex: 1; justify-content: center; }
}
@media (max-width: 420px) {
  .stat-grid { grid-template-columns: 1fr; }
  .sidebar { width: 84vw; max-width: 300px; }
}