:root {
  --bg: #0b0f1a;
  --surface: #151b2c;
  --surface-2: #1e2740;
  --border: #2a3551;
  --text: #f3f6ff;
  --muted: #9aa6c4;
  --primary: #4f7cff;
  --primary-press: #3b63d8;
  --success: #2fbf71;
  --danger: #ff5a5a;
  --radius: 16px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; height: 100%;
  background: var(--bg); color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  -webkit-user-select: none; user-select: none;
  overscroll-behavior: none;
}

body { display: flex; flex-direction: column; min-height: 100dvh; }

/* ---- screens ---- */
.screen { display: none; flex: 1; min-height: 100dvh; padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }
.screen.active { display: flex; flex-direction: column; }
.hidden { display: none !important; }

/* ---- home ---- */
.home-inner { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px; padding: 24px; }
.brand { font-size: clamp(28px, 7vw, 44px); font-weight: 700; margin: 0; letter-spacing: -0.5px; }
.clock { font-size: clamp(40px, 12vw, 72px); font-weight: 700; margin: 0; font-variant-numeric: tabular-nums; color: var(--text); }

/* ---- buttons ---- */
.btn {
  font: inherit; font-weight: 600; color: var(--text);
  border: none; border-radius: var(--radius);
  padding: 14px 20px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; transition: background .15s ease, transform .1s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); }
.btn-primary:active { background: var(--primary-press); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-huge { font-size: 24px; padding: 28px 40px; border-radius: 24px; min-width: min(80vw, 360px); flex-direction: column; gap: 14px; box-shadow: 0 10px 30px rgba(79,124,255,.35); }
.btn-icon { display: grid; place-items: center; }
.btn-admin { position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom)); }
.app-version { position: fixed; left: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); font-size: 12px; color: var(--muted); opacity: .6; }
.btn-back, .btn-home { align-self: flex-start; margin: 16px; }
.btn-card { background: var(--surface); border: 1px solid var(--border); width: 100%; padding: 24px; font-size: 18px; justify-content: flex-start; }

/* ---- camera ---- */
.camera-wrap { position: relative; flex: 1; width: 100%; background: #000; overflow: hidden; display: grid; place-items: center; }
#video, #enroll-video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.scan-frame { position: absolute; width: min(70vw, 320px); aspect-ratio: 3/4; border: 3px solid rgba(255,255,255,.55); border-radius: 24px; box-shadow: 0 0 0 9999px rgba(0,0,0,.45); transition: border-color .2s ease, box-shadow .2s ease; }
.scan-frame.ok { border-color: var(--success); box-shadow: 0 0 0 9999px rgba(0,0,0,.45), 0 0 24px rgba(47,191,113,.6); }
.scan-frame.bad { border-color: var(--danger); box-shadow: 0 0 0 9999px rgba(0,0,0,.45), 0 0 24px rgba(255,90,90,.5); }
.status-banner {
  position: absolute; bottom: calc(28px + env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,.7); padding: 14px 22px; border-radius: 999px; font-size: 18px; font-weight: 600;
  max-width: 90vw; text-align: center;
}
.status-banner.ok { background: rgba(47,191,113,.92); }
.status-banner.bad { background: rgba(255,90,90,.92); }
.btn-back[data-back], .btn-back[data-enroll-cancel] { position: absolute; left: 16px; top: calc(16px + env(safe-area-inset-top)); z-index: 5; }

/* face-position hint above the scan frame */
.cam-instruction {
  position: absolute; top: calc(24px + env(safe-area-inset-top)); left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,.55); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-size: 14px; font-weight: 500; max-width: 88vw; text-align: center;
}

/* enrollment header: name + 3 progress dots */
.dialog-full { position: fixed; inset: 0; z-index: 60; display: flex; flex-direction: column; background: #000; }
.enroll-head { position: absolute; top: calc(20px + env(safe-area-inset-top)); right: 16px; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; z-index: 5; }
.enroll-name { background: rgba(0,0,0,.6); color: #fff; padding: 6px 14px; border-radius: 999px; font-weight: 600; font-size: 14px; }
.dots3 { display: flex; gap: 10px; }
.dots3 span { width: 14px; height: 14px; border-radius: 50%; background: rgba(255,255,255,.25); border: 2px solid rgba(255,255,255,.5); transition: background .2s ease, transform .2s ease; }
.dots3 span.filled { background: var(--success); border-color: var(--success); transform: scale(1.15); }

/* big confirmation card for attendance */
.result-card {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: rgba(11,15,26,.92); border: 2px solid var(--success); border-radius: 20px;
  padding: 26px 30px; text-align: center; min-width: min(78vw, 340px); z-index: 6;
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
}
.result-card.bad { border-color: var(--danger); }
.result-card .rc-icon { font-size: 40px; line-height: 1; margin-bottom: 8px; }
.result-card .rc-name { font-size: 24px; font-weight: 700; }
.result-card .rc-sub { color: var(--muted); margin-top: 4px; font-size: 14px; }
.result-card .rc-time { font-size: 17px; margin-top: 10px; font-variant-numeric: tabular-nums; }

/* ---- PIN ---- */
.pad-inner { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; padding: 24px; }
.pin-dots { display: flex; gap: 16px; height: 18px; }
.pin-dots .dot { width: 16px; height: 16px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--border); }
.pin-dots .dot.filled { background: var(--primary); border-color: var(--primary); }
.pin-error { color: var(--danger); min-height: 20px; font-size: 14px; }
.keypad { display: grid; grid-template-columns: repeat(3, 78px); gap: 14px; }
.key { font-size: 26px; height: 78px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.key:active { background: var(--surface-2); }
.key-muted { color: var(--muted); font-size: 20px; }

/* ---- topbar / admin ---- */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.topbar h2 { margin: 0; font-size: 18px; }
.admin-menu { padding: 18px; display: flex; flex-direction: column; gap: 14px; }

/* ---- lists ---- */
.list { padding: 14px; display: flex; flex-direction: column; gap: 10px; overflow-y: auto; }
.emp-row { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.emp-row .meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.emp-row .name { font-weight: 600; }
.emp-row .sub { font-size: 13px; color: var(--muted); }
.emp-row .actions { display: flex; gap: 8px; flex-shrink: 0; }
.pill { font-size: 12px; padding: 4px 10px; border-radius: 999px; }
.pill.enrolled { background: rgba(47,191,113,.18); color: var(--success); }
.pill.none { background: rgba(255,90,90,.15); color: var(--danger); }
.btn-sm { padding: 8px 12px; min-height: 0; font-size: 14px; }

/* ---- dialog ---- */
.dialog { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: grid; place-items: center; z-index: 50; padding: 20px; }
.dialog-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; width: min(420px, 100%); display: flex; flex-direction: column; gap: 14px; }
.dialog-card h3 { margin: 0; }
.dialog-card label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.dialog-card input { font: inherit; padding: 12px 14px; min-height: 48px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); -webkit-user-select: text; user-select: text; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }
.form-error { color: var(--danger); font-size: 13px; min-height: 16px; }

/* ---- dashboard ---- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; padding: 14px; border-bottom: 1px solid var(--border); }
.filters label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.filters input { font: inherit; padding: 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); }
.summary { padding: 14px; display: flex; gap: 12px; flex-wrap: wrap; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 18px; }
.stat .num { font-size: 24px; font-weight: 700; }
.stat .lbl { font-size: 12px; color: var(--muted); }
.table-wrap { overflow: auto; padding: 0 14px 24px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--bg); }
td .t-time { font-variant-numeric: tabular-nums; }
.empty { padding: 40px 20px; text-align: center; color: var(--muted); }

/* ---- toast ---- */
.toast { position: fixed; left: 50%; bottom: calc(28px + env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--surface-2); border: 1px solid var(--border); padding: 14px 20px; border-radius: 12px; z-index: 100; max-width: 90vw; text-align: center; }
.toast.ok { border-color: var(--success); }
.toast.bad { border-color: var(--danger); }

/* ---- full-screen success ---- */
.success-screen {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #1b9e57 0%, #0f7a42 100%);
  color: #fff; text-align: center;
  padding: calc(24px + env(safe-area-inset-top)) 24px calc(24px + env(safe-area-inset-bottom));
}
.success-inner { display: flex; flex-direction: column; align-items: center; gap: 6px; animation: pop .35s ease-out; }
.success-check { color: #fff; margin-bottom: 10px; animation: pop .45s ease-out; }
.success-name { font-size: clamp(30px, 9vw, 52px); font-weight: 800; letter-spacing: -0.5px; }
.success-sub { font-size: clamp(15px, 4.5vw, 20px); opacity: .9; }
.success-time { font-size: clamp(18px, 5vw, 24px); margin-top: 12px; font-variant-numeric: tabular-nums; font-weight: 600; }
.success-msg { margin-top: 18px; font-size: 15px; background: rgba(255,255,255,.18); padding: 8px 18px; border-radius: 999px; }
@keyframes pop { from { transform: scale(.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }

@media (prefers-reduced-motion: reduce) { *, .success-inner, .success-check { animation: none !important; transition: none !important; } }