/* ── Variables ────────────────────────────────────────────────── */
:root {
  --bg:       #0f172a;
  --bg2:      #1e293b;
  --bg3:      #334155;
  --accent:   #38bdf8;
  --accent2:  #0ea5e9;
  --success:  #22c55e;
  --danger:   #ef4444;
  --warning:  #f59e0b;
  --text:     #f1f5f9;
  --text2:    #94a3b8;
  --text3:    #64748b;
  --border:   #334155;
  --radius:   10px;
  --radius-sm:6px;
  --shadow:   0 4px 24px rgba(0,0,0,.4);
  --font:     'Inter', system-ui, sans-serif;
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
input, select, textarea, button { font-family: inherit; font-size: 1rem; }
img { max-width: 100%; }

/* ── Layout ──────────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 1.5rem; }
.container-md { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }

/* ── Navbar ──────────────────────────────────────────────────── */
.navbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
  position: sticky; top: 0; z-index: 100;
}
.navbar-inner { display: flex; align-items: center; gap: 1rem; }
.navbar-brand { font-size: 1.3rem; font-weight: 700; color: var(--accent); letter-spacing: -.03em; }
.navbar-brand span { color: var(--text2); font-weight: 400; }
.navbar-nav { display: flex; gap: .25rem; margin-left: auto; align-items: center; }
.nav-link { padding: .4rem .8rem; border-radius: var(--radius-sm); color: var(--text2); font-size: .9rem; transition: all .15s; }
.nav-link:hover, .nav-link.active { background: var(--bg3); color: var(--text); text-decoration: none; }
.nav-link.danger:hover { background: rgba(239,68,68,.15); color: var(--danger); }

/* ── Cards ───────────────────────────────────────────────────── */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.card-header { margin-bottom: 1.25rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.card-title { font-size: 1.15rem; font-weight: 600; }
.card + .card { margin-top: 1rem; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .35rem; font-size: .875rem; color: var(--text2); font-weight: 500; }
.form-control {
  width: 100%; padding: .6rem .9rem;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  transition: border-color .15s;
}
.form-control:focus { outline: none; border-color: var(--accent); }
.form-control::placeholder { color: var(--text3); }
select.form-control { cursor: pointer; }
.form-check { display: flex; align-items: center; gap: .5rem; cursor: pointer; }
.form-check input { width: 1rem; height: 1rem; cursor: pointer; accent-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-hint { font-size: .8rem; color: var(--text3); margin-top: .25rem; }
.form-actions { display: flex; gap: .75rem; align-items: center; margin-top: 1.5rem; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .55rem 1.2rem; border-radius: var(--radius-sm);
  font-weight: 500; font-size: .9rem; cursor: pointer;
  border: none; transition: all .15s; white-space: nowrap;
  text-decoration: none;
}
.btn:hover { text-decoration: none; opacity: .9; transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-primary   { background: var(--accent2); color: #fff; }
.btn-success   { background: var(--success); color: #fff; }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-warning   { background: var(--warning); color: #000; }
.btn-secondary { background: var(--bg3); color: var(--text); }
.btn-ghost     { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-sm        { padding: .35rem .8rem; font-size: .825rem; }
.btn-lg        { padding: .8rem 2rem; font-size: 1.1rem; }
.btn-block     { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .5; pointer-events: none; }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { background: var(--bg3); color: var(--text2); font-weight: 600; text-align: left; padding: .65rem 1rem; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
td { padding: .7rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

/* ── Badges ──────────────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; padding: .2rem .6rem; border-radius: 999px; font-size: .75rem; font-weight: 600; }
.badge-success { background: rgba(34,197,94,.15); color: var(--success); }
.badge-danger  { background: rgba(239,68,68,.15); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,.15); color: var(--warning); }
.badge-info    { background: rgba(56,189,248,.15); color: var(--accent); }
.badge-neutral { background: var(--bg3); color: var(--text2); }

/* ── Alerts ──────────────────────────────────────────────────── */
.alert { padding: .85rem 1.1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; border: 1px solid; font-size: .9rem; }
.alert-success { background: rgba(34,197,94,.1);  border-color: rgba(34,197,94,.3);  color: #86efac; }
.alert-danger  { background: rgba(239,68,68,.1);  border-color: rgba(239,68,68,.3);  color: #fca5a5; }
.alert-info    { background: rgba(56,189,248,.1); border-color: rgba(56,189,248,.3); color: #7dd3fc; }
.alert-warning { background: rgba(245,158,11,.1); border-color: rgba(245,158,11,.3); color: #fcd34d; }

/* ── Page header ─────────────────────────────────────────────── */
.page-header { padding: 2rem 0 1.5rem; }
.page-header h1 { font-size: 1.6rem; font-weight: 700; }
.page-header p  { color: var(--text2); margin-top: .35rem; }
.breadcrumb { font-size: .85rem; color: var(--text3); margin-bottom: .5rem; }
.breadcrumb a { color: var(--text2); }
.breadcrumb span { margin: 0 .4rem; }

/* ── Participant scan UI ─────────────────────────────────────── */
.scan-wrap { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2rem 1rem; }
.scan-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 1.25rem; padding: 2.5rem 2rem; width: 100%; max-width: 420px; box-shadow: var(--shadow); }
.scan-logo { font-size: 2rem; font-weight: 800; color: var(--accent); text-align: center; margin-bottom: .5rem; letter-spacing: -.04em; }
.scan-subtitle { text-align: center; color: var(--text2); font-size: .9rem; margin-bottom: 2rem; }
.scan-success { text-align: center; }
.scan-success .icon { font-size: 3.5rem; margin-bottom: 1rem; }
.scan-success h2 { font-size: 1.4rem; margin-bottom: .5rem; }
.scan-success .time { font-size: 2rem; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.scan-success .sub  { color: var(--text2); font-size: .9rem; margin-top: .5rem; }

/* ── Chrono display ──────────────────────────────────────────── */
.chrono { font-size: 2.5rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--accent); text-align: center; letter-spacing: -.02em; }
.chrono-label { text-align: center; color: var(--text2); font-size: .85rem; margin-top: .25rem; }

/* ── Dashboard ───────────────────────────────────────────────── */
.seg-pill { display: inline-flex; align-items: center; gap: .3rem; padding: .2rem .5rem; border-radius: 4px; font-size: .75rem; font-weight: 600; margin: .1rem; }
.seg-pill.ok  { background: rgba(34,197,94,.15); color: var(--success); }
.seg-pill.nok { background: rgba(239,68,68,.15);  color: var(--danger); }
.seg-pill.na  { background: var(--bg3); color: var(--text3); }

/* ── Accordion ───────────────────────────────────────────────── */
details > summary { cursor: pointer; user-select: none; list-style: none; }
details > summary::-webkit-details-marker { display: none; }
.accordion-header { display: flex; align-items: center; justify-content: space-between; padding: .75rem 1rem; background: var(--bg3); border-radius: var(--radius-sm); font-weight: 500; font-size: .9rem; transition: background .15s; }
.accordion-header:hover { background: #3d556e; }
.accordion-header .chevron { transition: transform .2s; }
details[open] .accordion-header .chevron { transform: rotate(180deg); }
.accordion-body { padding: 1rem; border: 1px solid var(--border); border-top: none; border-radius: 0 0 var(--radius-sm) var(--radius-sm); }

/* ── Map ─────────────────────────────────────────────────────── */
#map { height: 320px; border-radius: var(--radius-sm); border: 1px solid var(--border); }

/* ── Drag & drop sort ────────────────────────────────────────── */
.sortable-item { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .75rem 1rem; display: flex; align-items: center; gap: .75rem; margin-bottom: .5rem; cursor: grab; transition: box-shadow .15s; }
.sortable-item:hover { box-shadow: 0 2px 12px rgba(0,0,0,.3); }
.sortable-item.sortable-chosen { opacity: .7; cursor: grabbing; }
.sort-handle { color: var(--text3); font-size: 1.1rem; }

/* ── Grid layouts ────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.stat-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.stat-card .stat-val { font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-card .stat-label { color: var(--text2); font-size: .85rem; margin-top: .2rem; }

/* ── Utilities ───────────────────────────────────────────────── */
.mt-1 { margin-top: .5rem; }  .mt-2 { margin-top: 1rem; }  .mt-3 { margin-top: 1.5rem; }  .mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.gap-1 { gap: .5rem; }
.text-muted { color: var(--text2); }
.text-sm    { font-size: .875rem; }
.text-xs    { font-size: .775rem; }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.w-full { width: 100%; }
.hidden { display: none; }
.divider { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .navbar-nav .nav-link span { display: none; }
  th, td { padding: .5rem .65rem; }
}