/* ============================================================================
   NIDSG Attendance Register — design system
   Calm, civic, high-contrast. Tablet-first with large touch targets.
   All colours are CSS variables so the whole look can be re-branded in one place.
   ========================================================================== */

/* ---- Tokens: light (default) --------------------------------------------- */
:root {
  --ground:     #F4F6F3;
  --surface:    #FFFFFF;
  --surface-2:  #FAFBF9;
  --surface-3:  #EEF1EC;
  --border:     #DDE2DA;
  --border-strong: #C6CDC2;
  --ink:        #1A211D;
  --ink-2:      #414A44;
  --ink-muted:  #5E685F;

  --accent:        #00795D;
  --accent-strong: #045C48;
  --accent-ink:    #FFFFFF;
  --accent-soft:   #E1F0EA;
  --accent-soft-2: #D2E8DF;

  --amber:      #BE710C;
  --amber-soft: #F7EBD8;
  --good:       #2E7D46;
  --good-soft:  #E4F1E7;
  --danger:     #B4362B;
  --danger-soft:#F7E4E1;

  --focus:      #0B7DDA;

  --shadow: 0 1px 2px rgba(20,30,25,.05), 0 2px 8px rgba(20,30,25,.05);
  --shadow-lg: 0 8px 30px rgba(20,30,25,.16);

  --r-sm: 8px; --r: 12px; --r-lg: 18px; --r-pill: 999px;
  --tap: 48px;                    /* minimum touch target */
  --maxw: 1080px;

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, "Noto Sans", sans-serif;

  color-scheme: light;
}

/* ---- Tokens: dark -------------------------------------------------------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground:     #101410;
    --surface:    #181D18;
    --surface-2:  #1E241E;
    --surface-3:  #262D25;
    --border:     #2D352C;
    --border-strong: #3C463A;
    --ink:        #EAEEE7;
    --ink-2:      #C3CBC1;
    --ink-muted:  #93A093;

    --accent:        #2CA791;
    --accent-strong: #4FC0AB;
    --accent-ink:    #06231C;
    --accent-soft:   #16302A;
    --accent-soft-2: #1C3E36;

    --amber:      #D79A4A;
    --amber-soft: #322613;
    --good:       #56B673;
    --good-soft:  #17321F;
    --danger:     #E0796D;
    --danger-soft:#361E1B;

    --focus:      #5AB0F0;

    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 2px 10px rgba(0,0,0,.35);
    --shadow-lg: 0 10px 34px rgba(0,0,0,.55);
    color-scheme: dark;
  }
}
/* Explicit dark toggle wins in both directions */
:root[data-theme="dark"] {
  --ground:#101410; --surface:#181D18; --surface-2:#1E241E; --surface-3:#262D25;
  --border:#2D352C; --border-strong:#3C463A;
  --ink:#EAEEE7; --ink-2:#C3CBC1; --ink-muted:#93A093;
  --accent:#2CA791; --accent-strong:#4FC0AB; --accent-ink:#06231C;
  --accent-soft:#16302A; --accent-soft-2:#1C3E36;
  --amber:#D79A4A; --amber-soft:#322613; --good:#56B673; --good-soft:#17321F;
  --danger:#E0796D; --danger-soft:#361E1B; --focus:#5AB0F0;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 2px 10px rgba(0,0,0,.35);
  --shadow-lg:0 10px 34px rgba(0,0,0,.55);
  color-scheme: dark;
}

/* ---- Base ---------------------------------------------------------------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
h1,h2,h3 { margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
p { margin: 0; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
.icon { display: block; flex: none; }
.tnum { font-variant-numeric: tabular-nums; }

/* ---- App shell ----------------------------------------------------------- */
.appbar {
  position: sticky; top: 0; z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.appbar-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 14px;
  padding: 12px 18px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 42px; height: 42px; flex: none; border-radius: 11px;
  background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
  letter-spacing: -0.03em;
}
.brand-text { min-width: 0; }
.brand-name { font-size: 19px; font-weight: 750; line-height: 1.1; }
.brand-tag { font-size: 12.5px; color: var(--ink-muted); letter-spacing: .02em; }
.appbar-spacer { flex: 1; }

.backup-pill {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 12px; border-radius: var(--r-pill);
  font-size: 13px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--ink-2);
}
.backup-pill.warn { background: var(--amber-soft); border-color: transparent; color: var(--amber); }
.backup-pill .icon { width: 16px; height: 16px; }
.icon-btn {
  width: var(--tap); height: var(--tap); flex: none;
  display: grid; place-items: center; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--ink-2); border-radius: var(--r);
}
.icon-btn:hover { background: var(--surface-3); }

/* ---- Tabs ---------------------------------------------------------------- */
.tabs {
  position: sticky; top: 67px; z-index: 15;
  background: var(--ground);
  border-bottom: 1px solid var(--border);
}
.tabs-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 8px 12px;
  display: flex; gap: 6px; overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.tab {
  flex: 1 1 0; min-width: 116px; min-height: var(--tap);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; padding: 8px 10px; cursor: pointer;
  border: 1px solid transparent; border-radius: var(--r);
  background: transparent; color: var(--ink-muted); font-weight: 650; font-size: 14px;
}
.tab .icon { width: 24px; height: 24px; }
.tab:hover { background: var(--surface-2); color: var(--ink-2); }
.tab.active { background: var(--accent-soft); color: var(--accent-strong); }
:root[data-theme="dark"] .tab.active,
:root:not([data-theme="light"]) .tab.active { color: var(--accent-strong); }

/* ---- Layout -------------------------------------------------------------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 22px 18px 96px; }
.view-head { margin-bottom: 18px; }
.view-title { font-size: 24px; font-weight: 760; }
.view-sub { color: var(--ink-muted); font-size: 15px; margin-top: 4px; max-width: 62ch; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); box-shadow: var(--shadow);
}
.card.pad { padding: 18px; }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: var(--tap); padding: 0 20px; cursor: pointer;
  border-radius: var(--r); border: 1px solid transparent;
  font-weight: 680; font-size: 16px; line-height: 1;
  background: var(--surface-2); color: var(--ink); border-color: var(--border);
  transition: transform .04s ease;
}
.btn:active { transform: translateY(1px); }
.btn .icon { width: 20px; height: 20px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.btn.danger:hover { filter: brightness(.97); }
.btn.big { min-height: 68px; font-size: 20px; padding: 0 28px; border-radius: var(--r-lg); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---- Forms --------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 15px; }
.field label { font-weight: 640; font-size: 14px; color: var(--ink-2); }
.field .hint { font-size: 12.5px; color: var(--ink-muted); }
.input, .select, textarea.input {
  width: 100%; min-height: var(--tap); padding: 11px 14px;
  border: 1.5px solid var(--border-strong); border-radius: var(--r);
  background: var(--surface); color: var(--ink); font: inherit;
}
textarea.input { min-height: 88px; resize: vertical; line-height: 1.45; }
.input::placeholder { color: var(--ink-muted); opacity: .8; }
.input:focus, .select:focus, textarea.input:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.field.invalid .input, .field.invalid .select { border-color: var(--danger); }
.field .err { color: var(--danger); font-size: 13px; font-weight: 600; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.req { color: var(--danger); }

/* Segmented control (e.g. gender) */
.segment { display: flex; gap: 8px; flex-wrap: wrap; }
.segment button {
  flex: 1 1 0; min-width: 96px; min-height: var(--tap); cursor: pointer;
  border: 1.5px solid var(--border-strong); background: var(--surface);
  border-radius: var(--r); color: var(--ink-2); font-weight: 640; font-size: 15px;
}
.segment button.on { background: var(--accent); color: var(--accent-ink); border-color: transparent; }

/* ---- Big search ---------------------------------------------------------- */
.searchbox { position: relative; }
.searchbox .icon.search-ic {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  width: 24px; height: 24px; color: var(--ink-muted);
}
.searchbox input {
  width: 100%; height: 64px; padding: 0 18px 0 54px;
  font-size: 20px; border: 2px solid var(--border-strong); border-radius: var(--r-lg);
  background: var(--surface); color: var(--ink);
}
.searchbox input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.searchbox .clear-ic {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border: none; background: transparent; color: var(--ink-muted);
  cursor: pointer; display: grid; place-items: center; border-radius: 50%;
}
.searchbox .clear-ic:hover { background: var(--surface-3); }

/* ---- Person result / list rows ------------------------------------------ */
.result-list { display: flex; flex-direction: column; gap: 10px; }
.person-row {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  padding: 14px 16px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
}
.person-row:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.avatar {
  width: 46px; height: 46px; flex: none; border-radius: 50%;
  display: grid; place-items: center; font-weight: 720; font-size: 17px;
  background: var(--accent-soft); color: var(--accent-strong);
}
.person-main { min-width: 0; flex: 1; }
.person-name { font-size: 18px; font-weight: 680; }
.person-name mark { background: var(--accent-soft-2); color: inherit; padding: 0 2px; border-radius: 4px; }
.person-meta {
  display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 3px;
  font-size: 13.5px; color: var(--ink-muted);
}
.person-meta span { display: inline-flex; align-items: center; gap: 5px; }
.person-meta .icon { width: 14px; height: 14px; }
.row-tail { display: flex; align-items: center; gap: 8px; flex: none; }

/* Status chips */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 11px; border-radius: var(--r-pill);
  font-size: 13px; font-weight: 680; white-space: nowrap;
}
.chip .icon { width: 15px; height: 15px; }
.chip.present { background: var(--good-soft); color: var(--good); }
.chip.notyet { background: var(--surface-3); color: var(--ink-muted); }

/* ---- Confirm person card (attendance) ----------------------------------- */
.confirm-card { padding: 4px 2px; }
.confirm-top { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; }
.avatar.lg { width: 64px; height: 64px; font-size: 24px; }
.confirm-name { font-size: 24px; font-weight: 740; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 4px 0 20px; }
.detail { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--r); padding: 11px 14px; }
.detail .k { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-muted); font-weight: 680; }
.detail .v { font-size: 16px; margin-top: 2px; word-break: break-word; }

/* ---- Empty / hint states ------------------------------------------------- */
.empty { text-align: center; padding: 40px 20px; color: var(--ink-muted); }
.empty .icon { width: 40px; height: 40px; margin: 0 auto 12px; color: var(--border-strong); }
.empty h3 { color: var(--ink-2); font-size: 18px; margin-bottom: 6px; }
.callout {
  display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--r);
  background: var(--accent-soft); color: var(--accent-strong); font-size: 14.5px;
}
.callout.amber { background: var(--amber-soft); color: var(--amber); }
.callout .icon { width: 22px; height: 22px; flex: none; margin-top: 1px; }
.callout a { color: inherit; font-weight: 700; }

/* ---- Dashboard ----------------------------------------------------------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 16px; box-shadow: var(--shadow);
}
.stat .label { font-size: 13px; color: var(--ink-muted); font-weight: 640; }
.stat .num { font-size: 34px; font-weight: 780; line-height: 1.05; margin-top: 6px; letter-spacing: -0.02em; }
.stat .sub { font-size: 12.5px; color: var(--ink-muted); margin-top: 3px; }
.stat.accent .num { color: var(--accent-strong); }

.panel { margin-bottom: 16px; }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; gap: 10px; }
.panel-title { font-size: 16px; font-weight: 720; }
.panel-note { font-size: 12.5px; color: var(--ink-muted); }

/* Horizontal bar chart (built from divs) */
.hbars { display: flex; flex-direction: column; gap: 11px; }
.hbar-row { display: grid; grid-template-columns: 148px 1fr 44px; align-items: center; gap: 12px; }
.hbar-label { font-size: 14px; color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hbar-track { height: 22px; background: var(--surface-3); border-radius: 6px; overflow: hidden; }
.hbar-fill { height: 100%; border-radius: 6px 4px 4px 6px; background: var(--accent); min-width: 3px; }
.hbar-fill.amber { background: var(--amber); }
.hbar-val { font-size: 14px; font-weight: 680; text-align: right; color: var(--ink-2); }

/* Gender split bar */
.split { height: 30px; display: flex; border-radius: var(--r); overflow: hidden; gap: 2px; background: var(--surface-3); }
.split > div { display: grid; place-items: center; color: #fff; font-size: 13px; font-weight: 700; min-width: 2px; }
.split .s-f { background: var(--accent); }
.split .s-m { background: var(--amber); }
.split .s-u { background: var(--border-strong); color: var(--ink-2); }
.legend { display: flex; gap: 16px; margin-top: 10px; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-2); }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.swatch { width: 13px; height: 13px; border-radius: 3px; flex: none; }

/* attendance-over-time mini bars */
.tbars { display: flex; align-items: flex-end; gap: 8px; height: 130px; padding-top: 8px; }
.tbar { flex: 1 1 0; display: flex; flex-direction: column; align-items: center; gap: 6px; min-width: 0; }
.tbar .col { width: 100%; max-width: 46px; background: var(--accent); border-radius: 6px 6px 0 0; min-height: 3px; }
.tbar .cap { font-size: 11.5px; color: var(--ink-muted); text-align: center; white-space: nowrap; }
.tbar .cnt { font-size: 13px; font-weight: 700; }

/* ---- Table (register list, import preview) ------------------------------ */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r-lg); }
table.data { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
table.data th, table.data td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--border); }
table.data th { background: var(--surface-2); font-weight: 700; font-size: 13px; color: var(--ink-2); position: sticky; top: 0; }
table.data tr:last-child td { border-bottom: none; }
table.data tbody tr:hover { background: var(--surface-2); }

/* ---- Modal --------------------------------------------------------------- */
.overlay {
  position: fixed; inset: 0; z-index: 50; background: rgba(15,22,18,.5);
  display: flex; align-items: flex-end; justify-content: center; padding: 0;
  backdrop-filter: blur(2px);
}
.modal {
  background: var(--surface); width: 100%; max-width: 560px;
  border-radius: var(--r-lg) var(--r-lg) 0 0; box-shadow: var(--shadow-lg);
  max-height: 92vh; display: flex; flex-direction: column;
  animation: sheet .22s ease;
}
.modal.wide { max-width: 860px; }
@keyframes sheet { from { transform: translateY(24px); opacity: .6; } to { transform: none; opacity: 1; } }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 16px 12px 20px; border-bottom: 1px solid var(--border); }
.modal-title { font-size: 19px; font-weight: 740; }
.modal-body { padding: 18px 20px; overflow-y: auto; }
.modal-foot { display: flex; gap: 10px; justify-content: flex-end; padding: 14px 20px; border-top: 1px solid var(--border); }
.modal-foot .btn { flex: 1; }
.confirm-text { font-size: 16px; color: var(--ink-2); line-height: 1.55; }

/* ---- Toast --------------------------------------------------------------- */
.toast-host { position: fixed; left: 0; right: 0; bottom: 20px; z-index: 80; display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none; }
.toast {
  display: flex; align-items: center; gap: 10px; pointer-events: auto;
  background: var(--ink); color: var(--ground);
  padding: 13px 18px; border-radius: var(--r-pill); box-shadow: var(--shadow-lg);
  font-size: 15px; font-weight: 600; max-width: 92vw;
  opacity: 0; transform: translateY(12px); transition: all .28s ease;
}
.toast.show { opacity: 1; transform: none; }
.toast.error { background: var(--danger); color: #fff; }
.toast.error .toast-ic, .toast .toast-ic { display: flex; }
.toast .toast-ic .icon { width: 20px; height: 20px; }

/* ---- Steps / help -------------------------------------------------------- */
.steps { display: flex; flex-direction: column; gap: 10px; margin: 8px 0; }
.step { display: flex; gap: 12px; align-items: flex-start; }
.step .n { width: 28px; height: 28px; flex: none; border-radius: 50%; background: var(--accent-soft); color: var(--accent-strong); display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.step .t { font-size: 14.5px; color: var(--ink-2); padding-top: 3px; }

.settings-list { display: flex; flex-direction: column; gap: 14px; }
.today-banner { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.today-count { display: inline-flex; align-items: baseline; gap: 8px; font-size: 15px; color: var(--ink-2); }
.today-count b { font-size: 26px; color: var(--accent-strong); }

/* ---- Responsive ---------------------------------------------------------- */
@media (min-width: 640px) {
  .overlay { align-items: center; padding: 24px; }
  .modal { border-radius: var(--r-lg); }
  .modal-foot .btn { flex: none; }
}
@media (max-width: 860px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .grid-2, .detail-grid { grid-template-columns: 1fr; }
  .hbar-row { grid-template-columns: 100px 1fr 40px; }
  .brand-tag { display: none; }
  .tab span.tab-label { font-size: 12.5px; }
  main { padding: 16px 14px 90px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* Print: a clean attendance sheet if someone wants paper backup */
@media print {
  .appbar, .tabs, .backup-pill, .icon-btn, .btn { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; border-color: #999; }
}