@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&family=Fira+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500;1,600;1,700&display=swap');

/* ============================================================
   Design tokens — Data-Dense Dashboard
   Navy data + amber highlights. Density 8/10 (8–32px scale).
   ============================================================ */
:root {
  --primary: #1E40AF;
  --primary-hover: #1B3A9E;
  --primary-soft: #EFF4FF;
  --on-primary: #FFFFFF;
  --secondary: #3B82F6;
  --accent: #D97706;
  --accent-text: #B45309;   /* 4.6:1 on card — amber needs darkening for text */
  --accent-soft: #FEF6E7;
  --bg: #F4F7FC;
  --fg: #1E3A8A;
  --card: #FFFFFF;
  --card-fg: #1E3A8A;
  --muted: #E9EEF6;
  --muted-fg: #475569;
  --border: #DBEAFE;
  --border-strong: #C3D8FB;
  --ok: #047857;
  --ok-soft: #ECFDF5;
  --warn: #B45309;
  --warn-soft: #FEF6E7;
  --danger: #DC2626;
  --danger-soft: #FEF2F2;
  --ring: #1E40AF;
  --shadow-sm: 0 1px 2px rgba(15, 35, 95, .06), 0 1px 3px rgba(15, 35, 95, .04);
  --shadow-md: 0 4px 12px rgba(15, 35, 95, .07), 0 1px 3px rgba(15, 35, 95, .05);
  --shadow-lg: 0 18px 40px rgba(15, 35, 95, .14);

  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px;
  --r-sm: 7px; --r-md: 12px; --r-lg: 18px; --r-full: 999px;

  --sans: 'Fira Sans', system-ui, -apple-system, sans-serif;
  --mono: 'Fira Code', ui-monospace, 'SF Mono', monospace;

  /* Brand surface — fixed in both themes so the sign-in panel keeps its
     identity when the rest of the product flips to dark. */
  --brand-a: #1E40AF;
  --brand-b: #15317F;
  --brand-c: #0A1C4D;
  --on-brand: #EAF1FF;
  --on-brand-dim: #A9BDE6;

  --t-fast: 150ms; --t-mid: 240ms;
  --ease: cubic-bezier(.4, 0, .2, 1);
  --sidebar-w: 236px;
  --topbar-h: 60px;
}

/* Near-black ground, charcoal cards, single mint accent. Amber is kept for the
   "late / caution" meaning so status is never carried by the accent alone. */
:root[data-theme="dark"] {
  --primary: #3DDC97;
  --primary-hover: #55E4A7;
  --primary-soft: rgba(61, 220, 151, .13);
  --on-primary: #06271A;
  --secondary: #2DD4BF;
  --accent: #E3C565;
  --accent-text: #EBD282;
  --accent-soft: rgba(227, 197, 101, .14);
  --bg: #0B0C0E;
  --fg: #F3F4F6;
  --card: #161719;
  --card-fg: #F3F4F6;
  --muted: #1F2124;
  --muted-fg: #8B9096;
  --border: #212326;
  --border-strong: #2E3136;
  --ok: #3DDC97;
  --ok-soft: rgba(61, 220, 151, .13);
  --warn: #E3C565;
  --warn-soft: rgba(227, 197, 101, .14);
  --danger: #F2777A;
  --danger-soft: rgba(242, 119, 122, .14);
  --ring: #3DDC97;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, .55);
  --shadow-lg: 0 22px 50px rgba(0, 0, 0, .7);

  --brand-a: #163025;
  --brand-b: #0F1A17;
  --brand-c: #080B0A;
  --on-brand: #E8F6EF;
  --on-brand-dim: #93A79D;
}

/* ============================================================
   Base
   ============================================================ */
* { box-sizing: border-box; }

/* The hidden attribute must beat component display rules (.nav-item is flex,
   .scrim.is-on is block) or role gating silently fails. */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Display type is italic; tabular data stays upright so columns stay scannable. */
h1, h2, h3, h4 {
  margin: 0; font-weight: 600; letter-spacing: -.01em;
  font-style: italic;
}
h1 { font-size: 21px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
p  { margin: 0; }

/* The rule beside a section title. */
.screen-head h1, .card-head h2 { display: flex; align-items: center; gap: var(--sp-3); }
.screen-head h1::before, .card-head h2::before {
  content: ''; flex: none;
  width: 4px; height: 1.05em;
  border-radius: var(--r-full);
  background: var(--primary);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

:where(button, a, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.num  { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: var(--sp-4); top: -48px; z-index: 200;
  background: var(--primary); color: var(--on-primary);
  padding: var(--sp-2) var(--sp-4); border-radius: var(--r-md);
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: var(--sp-4); }

/* ============================================================
   App frame
   ============================================================ */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas: "sidebar topbar" "sidebar main";
  min-height: 100vh;
}

/* Topbar -------------------------------------------------- */
.topbar {
  grid-area: topbar;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 var(--sp-6);
  background: color-mix(in srgb, var(--card) 86%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 40;
}

.campus {
  display: flex; flex-direction: column; min-width: 0;
}
.campus strong { font-size: 13px; font-weight: 600; }
.campus span { font-size: 11px; color: var(--muted-fg); }
.campus-meta { display: flex; align-items: center; gap: 6px; }
.campus-meta .sep { opacity: .55; }
/* Tabular figures keep the clock from reflowing on every tick. */
.campus .clock {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.search {
  flex: 1; max-width: 420px; position: relative;
}
.search input {
  width: 100%; height: 36px;
  padding: 0 var(--sp-3) 0 34px;
  font: inherit; color: var(--fg);
  background: var(--muted);
  border: 1px solid transparent;
  border-radius: var(--r-md);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.search input::placeholder { color: var(--muted-fg); }
.search input:hover { border-color: var(--border-strong); }
.search input:focus { background: var(--card); border-color: var(--primary); }
.search .ico {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  color: var(--muted-fg); pointer-events: none;
}

.topbar-right { display: flex; align-items: center; gap: var(--sp-2); margin-left: auto; }

.live-pill {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  height: 32px; padding: 0 var(--sp-3);
  background: var(--ok-soft); color: var(--ok);
  border: 1px solid color-mix(in srgb, var(--ok) 26%, transparent);
  border-radius: var(--r-full);
  font-size: 12px; font-weight: 600; cursor: pointer;
}
.live-pill[data-state="paused"] { background: var(--muted); color: var(--muted-fg); border-color: var(--border-strong); }
.dot {
  width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex: none;
}
.live-pill[data-state="live"] .dot { animation: pulse 1.8s var(--ease) infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.8); }
}

.avatar {
  width: 32px; height: 32px; border-radius: 50%; flex: none;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--primary), var(--secondary));
  color: #fff; font-size: 11px; font-weight: 700;
}

/* Sidebar ------------------------------------------------- */
.sidebar {
  grid-area: sidebar;
  display: flex; flex-direction: column;
  gap: var(--sp-5);
  padding: var(--sp-4) var(--sp-3);
  background: var(--card);
  border-right: 1px solid var(--border);
  position: sticky; top: 0; height: 100vh;
  z-index: 50;
}

.brand {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-2) 0;
}
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--primary), var(--secondary));
  color: #fff; box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 13px; font-weight: 700; }
.brand-text span { font-size: 10px; color: var(--muted-fg); text-transform: uppercase; letter-spacing: .07em; }

.nav { display: flex; flex-direction: column; gap: var(--sp-1); }
.nav-label {
  font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted-fg); padding: var(--sp-2) var(--sp-3) var(--sp-1);
}
.nav-item {
  display: flex; align-items: center; gap: var(--sp-3);
  min-height: 40px; padding: 0 var(--sp-3);
  border: 0; width: 100%;
  background: transparent; color: var(--muted-fg);
  font: inherit; font-weight: 500; text-align: left;
  border-radius: var(--r-md); cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav-item:hover { background: var(--muted); color: var(--fg); }
.nav-item[aria-current="page"] {
  background: var(--primary-soft); color: var(--primary); font-weight: 600;
}
.nav-item svg { flex: none; }
.nav-item .badge { margin-left: auto; }

.sidebar-foot { margin-top: auto; display: flex; flex-direction: column; gap: var(--sp-3); }

.sync-card {
  padding: var(--sp-3);
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 11px;
}
.sync-card .row { display: flex; justify-content: space-between; gap: var(--sp-2); }
.sync-card .row + .row { margin-top: var(--sp-2); }
.sync-card dt { color: var(--muted-fg); }
.sync-card dd { margin: 0; font-weight: 600; }

/* Main ---------------------------------------------------- */
.main { grid-area: main; padding: var(--sp-6); min-width: 0; }

.screen { display: none; }
.screen.is-active { display: block; animation: screen-in var(--t-mid) var(--ease); }
@keyframes screen-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.screen-head {
  display: flex; align-items: flex-end; gap: var(--sp-4);
  flex-wrap: wrap; margin-bottom: var(--sp-5);
}
.screen-head .titles { min-width: 0; }
.screen-head p { color: var(--muted-fg); font-size: 13px; margin-top: 2px; }
.screen-head .actions { margin-left: auto; display: flex; gap: var(--sp-2); flex-wrap: wrap; }

/* ============================================================
   Primitives
   ============================================================ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.card-head {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
}
.card-head .actions { margin-left: auto; display: flex; gap: var(--sp-2); align-items: center; }
.card-head p { font-size: 12px; color: var(--muted-fg); }
.card-body { padding: var(--sp-5); }
.card-body.flush { padding: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  min-height: 36px; padding: 0 var(--sp-4);
  font: inherit; font-weight: 600; font-size: 13px;
  color: var(--fg); background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.btn:hover { background: var(--muted); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn[disabled]:hover { background: var(--card); }

.btn-primary {
  background: var(--primary); color: var(--on-primary); border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn-accent {
  background: var(--accent); color: #27170A; border-color: var(--accent);
}
.btn-accent:hover { filter: brightness(1.06); }

.btn-ghost { background: transparent; border-color: transparent; color: var(--muted-fg); }
.btn-ghost:hover { background: var(--muted); color: var(--fg); }

.btn-sm { min-height: 30px; padding: 0 var(--sp-3); font-size: 12px; }
.btn-icon { width: 36px; padding: 0; }
.btn-icon.btn-sm { width: 30px; }

.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; min-height: 24px;
  font-size: 11px; font-weight: 600;
  border-radius: var(--r-full);
  background: var(--muted); color: var(--muted-fg);
  border: 0;
  white-space: nowrap;
}
.chip-ok     { background: var(--ok-soft);     color: var(--ok);     border-color: color-mix(in srgb, var(--ok) 24%, transparent); }
.chip-warn   { background: var(--warn-soft);   color: var(--warn);   border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.chip-danger { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 26%, transparent); }
.chip-info   { background: var(--primary-soft); color: var(--primary); border-color: color-mix(in srgb, var(--primary) 20%, transparent); }
/* In dark, --ok and --primary are the same mint, which would render "Sent" and
   "Delivered" identically. Info takes the teal secondary, as the donut does. */
:root[data-theme="dark"] .chip-info {
  background: color-mix(in srgb, var(--secondary) 15%, transparent);
  color: var(--secondary);
}

.badge {
  min-width: 20px; height: 20px; padding: 0 6px;
  display: inline-grid; place-items: center;
  font-size: 11px; font-weight: 700; font-family: var(--mono);
  background: var(--primary); color: var(--on-primary);
  border-radius: var(--r-full);
}
.badge-soft { background: var(--muted); color: var(--muted-fg); }

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; font-weight: 600; }
.field .hint { font-size: 11px; color: var(--muted-fg); }
.input, .select, .textarea {
  min-height: 36px; padding: var(--sp-2) var(--sp-3);
  font: inherit; color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  width: 100%;
  transition: border-color var(--t-fast) var(--ease);
}
.input:focus, .select:focus, .textarea:focus { border-color: var(--primary); }
.textarea { min-height: 72px; resize: vertical; font-family: var(--mono); font-size: 12px; }
.input[readonly] { background: var(--muted); color: var(--muted-fg); }

.switch {
  position: relative; flex: none;
  width: 40px; height: 22px; padding: 0;
  background: var(--border-strong); border: 0; border-radius: var(--r-full);
  cursor: pointer; transition: background var(--t-fast) var(--ease);
}
.switch::after {
  content: ''; position: absolute; top: 3px; left: 3px;
  width: 16px; height: 16px; border-radius: 50%; background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast) var(--ease);
}
.switch[aria-checked="true"] { background: var(--primary); }
.switch[aria-checked="true"]::after { transform: translateX(18px); }

/* Grids --------------------------------------------------- */
.grid { display: grid; gap: var(--sp-4); }
.kpi-grid { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.span-2 { grid-column: span 2; }
.stack { display: flex; flex-direction: column; gap: var(--sp-4); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); }

/* KPI ----------------------------------------------------- */
.kpi {
  display: flex; align-items: flex-start; gap: var(--sp-4);
  padding: var(--sp-5);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.kpi:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* Tinted circular chip carries the metric's colour, so meaning survives
   without a coloured edge competing with the card shape. */
.kpi-chip {
  width: 42px; height: 42px; border-radius: 50%; flex: none;
  display: grid; place-items: center;
  color: var(--chip, var(--primary));
  background: color-mix(in srgb, var(--chip, var(--primary)) 15%, transparent);
}
/* A KPI that opens its student list is a real button, so it is reachable and
   operable from the keyboard like any other control. */
button.kpi {
  width: 100%; font: inherit; color: inherit; text-align: left;
  cursor: pointer;
}
.kpi-go {
  flex: none; align-self: center;
  color: var(--muted-fg);
  transition: color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
button.kpi:hover .kpi-go,
button.kpi:focus-visible .kpi-go { color: var(--primary); transform: translateX(2px); }

.kpi-main { min-width: 0; flex: 1; display: block; }
.kpi-label { display: block; font-size: 12px; color: var(--muted-fg); margin-top: 3px; }
.kpi-value {
  display: block;
  font-family: var(--sans); font-style: italic;
  font-size: 27px; font-weight: 600; letter-spacing: -.02em; line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.kpi-value small { font-size: 14px; color: var(--muted-fg); font-weight: 500; }
.kpi-foot {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  margin-top: var(--sp-3); font-size: 11px; color: var(--muted-fg);
}
.delta { font-weight: 600; font-family: var(--mono); }
.delta-up { color: var(--ok); }
.delta-down { color: var(--danger); }

.bar {
  height: 6px; border-radius: var(--r-full);
  background: var(--muted); overflow: hidden;
}
.bar > i {
  display: block; height: 100%; border-radius: var(--r-full);
  background: var(--primary);
  transition: width var(--t-mid) var(--ease);
}
.bar.ok > i { background: var(--ok); }
.bar.warn > i { background: var(--accent); }
.bar.danger > i { background: var(--danger); }

/* Tables -------------------------------------------------- */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
table.data th, table.data td {
  padding: var(--sp-3) var(--sp-4);
  text-align: left; white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
table.data th {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted-fg); background: var(--muted);
  position: sticky; top: 0; z-index: 1;
}
table.data tbody tr { transition: background var(--t-fast) var(--ease); }
table.data tbody tr:hover { background: var(--primary-soft); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data td.right, table.data th.right { text-align: right; }
.cell-main { display: flex; flex-direction: column; }
.cell-main strong { font-weight: 600; }
.cell-main span { font-size: 11px; color: var(--muted-fg); }

.empty {
  padding: var(--sp-8); text-align: center; color: var(--muted-fg);
}

/* Live feed ----------------------------------------------- */
.feed { max-height: 420px; overflow-y: auto; }
.feed-row {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  border-bottom: 1px solid var(--border);
}
.feed-row:last-child { border-bottom: 0; }
.feed-row.is-new { animation: feed-in var(--t-mid) var(--ease); }
@keyframes feed-in {
  from { opacity: 0; transform: translateX(-10px); background: var(--primary-soft); }
  to { opacity: 1; transform: none; }
}
.feed-dir {
  width: 28px; height: 28px; border-radius: 8px; flex: none;
  display: grid; place-items: center;
}
.feed-dir.in  { background: var(--ok-soft); color: var(--ok); }
.feed-dir.out { background: var(--accent-soft); color: var(--accent-text); }
.feed-main { min-width: 0; flex: 1; }
.feed-main strong { font-size: 13px; font-weight: 600; }
.feed-meta { font-size: 11px; color: var(--muted-fg); display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.feed-time { font-family: var(--mono); font-size: 12px; color: var(--muted-fg); flex: none; }

/* Device health ------------------------------------------- */
.device {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--card);
}
.device-state { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.device-state.ok { background: var(--ok); }
.device-state.warn { background: var(--accent); }
.device-state.danger { background: var(--danger); }
.device-body { flex: 1; min-width: 0; }
.device-body strong { font-size: 13px; display: block; }
.device-body span { font-size: 11px; color: var(--muted-fg); }

/* Chart holders ------------------------------------------- */
.chart-box { position: relative; height: 260px; }
.chart-box.short { height: 190px; }
.legend { display: flex; gap: var(--sp-4); flex-wrap: wrap; margin-top: var(--sp-3); font-size: 12px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; color: var(--muted-fg); }
.legend i { width: 14px; height: 3px; border-radius: 2px; background: var(--primary); flex: none; }
.legend i.dash { background: repeating-linear-gradient(90deg, var(--accent) 0 4px, transparent 4px 7px); height: 3px; }

/* Tabs ---------------------------------------------------- */
.tabs {
  display: flex; gap: var(--sp-1); flex-wrap: wrap;
  padding: var(--sp-1);
  background: var(--muted);
  border-radius: var(--r-md);
  width: fit-content; max-width: 100%;
}
.tab {
  min-height: 32px; padding: 0 var(--sp-4);
  border: 0; background: transparent; color: var(--muted-fg);
  font: inherit; font-size: 13px; font-weight: 600;
  border-radius: var(--r-sm); cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.tab:hover { color: var(--fg); }
.tab[aria-selected="true"] { background: var(--card); color: var(--primary); box-shadow: var(--shadow-sm); }

.tabpanel { display: none; }
.tabpanel.is-active { display: block; }

/* Rules --------------------------------------------------- */
.rule {
  display: flex; align-items: flex-start; gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
}
.rule:last-child { border-bottom: 0; }
.rule-body { flex: 1; min-width: 0; }
.rule-body strong { font-size: 13px; display: flex; align-items: center; gap: var(--sp-2); flex-wrap: wrap; }
.rule-body p { font-size: 12px; color: var(--muted-fg); margin-top: 3px; }
.rule-cost { font-size: 11px; font-family: var(--mono); color: var(--accent-text); margin-top: 6px; }

/* Credits ------------------------------------------------- */
.balance-hero {
  display: grid; gap: var(--sp-5);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  padding: var(--sp-6);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(900px 300px at 0% 0%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 70%),
    var(--card);
  box-shadow: var(--shadow-sm);
}
.balance-main .kpi-label { margin-bottom: var(--sp-2); }
.balance-value {
  font-family: var(--sans); font-style: italic;
  font-size: 46px; font-weight: 600;
  letter-spacing: -.03em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.balance-value small { font-size: 16px; font-weight: 500; color: var(--muted-fg); letter-spacing: 0; }
.balance-stats { display: grid; gap: var(--sp-3); grid-template-columns: repeat(2, 1fr); align-content: center; }
.stat-mini {
  padding: var(--sp-3) var(--sp-4);
  background: var(--muted); border-radius: var(--r-md);
}
.stat-mini dt { font-size: 11px; color: var(--muted-fg); font-weight: 500; }
.stat-mini dd {
  margin: 4px 0 0; font-family: var(--sans); font-style: italic;
  font-size: 19px; font-weight: 600; font-variant-numeric: tabular-nums;
}

.alert {
  display: flex; gap: var(--sp-3); align-items: flex-start;
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  background: var(--warn-soft);
  color: var(--warn);
  font-size: 13px;
}
.alert svg { flex: none; margin-top: 1px; }
.alert strong { display: block; font-weight: 600; }
.alert-info { border-color: color-mix(in srgb, var(--primary) 26%, transparent); background: var(--primary-soft); color: var(--primary); }

/* Integration cards --------------------------------------- */
.integration-head { display: flex; align-items: center; gap: var(--sp-3); }
.integration-logo {
  width: 38px; height: 38px; border-radius: 9px; flex: none;
  display: grid; place-items: center;
  font-weight: 700; font-size: 13px;
  background: var(--primary-soft); color: var(--primary);
}
.integration-logo.wa { background: var(--ok-soft); color: var(--ok); }

.kv { display: grid; grid-template-columns: 136px 1fr; gap: var(--sp-2) var(--sp-4); font-size: 12px; align-items: center; }
.kv dt { color: var(--muted-fg); font-weight: 600; }
.kv dd { margin: 0; font-family: var(--mono); overflow-wrap: anywhere; }

/* Simulation banner --------------------------------------- */
.sim-banner {
  display: none;
  align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  margin-bottom: var(--sp-5);
  border-radius: var(--r-md);
  background: var(--accent); color: #27170A;
  font-size: 13px; font-weight: 500;
  box-shadow: var(--shadow-sm);
}
.sim-banner.is-on { display: flex; }
.sim-banner strong { font-weight: 700; }
.sim-banner .btn { margin-left: auto; background: rgba(0,0,0,.14); border-color: rgba(0,0,0,.22); color: #27170A; }
.sim-banner .btn:hover { background: rgba(0,0,0,.22); }

/* Modal --------------------------------------------------- */
.modal-root {
  position: fixed; inset: 0; z-index: 100;
  display: none; place-items: center;
  padding: var(--sp-4);
  background: rgba(8, 16, 38, .55);
  backdrop-filter: blur(3px);
}
.modal-root.is-open { display: grid; }
.modal {
  width: 100%; max-width: 540px;
  max-height: 88vh; overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  animation: modal-in var(--t-mid) var(--ease);
}
.modal.wide { max-width: 720px; }
/* Five columns of message detail need more room than a standard dialog. */
.modal.xwide { max-width: 940px; }
@keyframes modal-in {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to { opacity: 1; transform: none; }
}
.modal-head {
  display: flex; align-items: flex-start; gap: var(--sp-3);
  padding: var(--sp-5); border-bottom: 1px solid var(--border);
}
.modal-head h2 { font-size: 16px; }
.modal-head p { font-size: 12px; color: var(--muted-fg); margin-top: 3px; }
.modal-body { padding: var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-4); }
.modal-foot {
  display: flex; gap: var(--sp-2); justify-content: flex-end;
  padding: var(--sp-4) var(--sp-5); border-top: 1px solid var(--border);
}

.preset-row { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.preset {
  flex: 1; min-width: 92px; min-height: 56px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; padding: var(--sp-2);
  background: var(--card); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); cursor: pointer;
  font: inherit;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.preset:hover { background: var(--muted); }
.preset[aria-pressed="true"] { border-color: var(--primary); background: var(--primary-soft); }
.preset b { font-family: var(--mono); font-size: 15px; font-weight: 600; }
.preset span { font-size: 10px; color: var(--muted-fg); }

/* WhatsApp preview --------------------------------------- */
.wa-preview {
  padding: var(--sp-4);
  border-radius: var(--r-md);
  background: #E7DED4;
  border: 1px solid #D6CABB;
}
:root[data-theme="dark"] .wa-preview { background: #0B1A14; border-color: #1C3327; }
.wa-bubble {
  position: relative;
  max-width: 320px; padding: var(--sp-3) var(--sp-4);
  background: #fff; color: #10231B;
  border-radius: 10px 10px 10px 2px;
  box-shadow: 0 1px 2px rgba(0,0,0,.18);
  font-size: 13px; line-height: 1.5;
}
:root[data-theme="dark"] .wa-bubble { background: #15372A; color: #E6F3EC; }
.wa-bubble .wa-head { font-weight: 700; font-size: 12px; color: var(--ok); margin-bottom: 4px; }
.wa-bubble .wa-foot {
  display: flex; justify-content: flex-end; align-items: center; gap: 4px;
  font-size: 10px; color: #6B7F77; margin-top: var(--sp-2);
}
.wa-var { background: var(--primary-soft); color: var(--primary); border-radius: 4px; padding: 0 3px; font-family: var(--mono); font-size: 12px; }

/* Toasts -------------------------------------------------- */
.toasts {
  position: fixed; right: var(--sp-5); bottom: var(--sp-5); z-index: 150;
  display: flex; flex-direction: column; gap: var(--sp-2);
  max-width: 340px;
}
.toast {
  display: flex; gap: var(--sp-3); align-items: flex-start;
  padding: var(--sp-3) var(--sp-4);
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  animation: toast-in var(--t-mid) var(--ease);
}
.toast.ok { border-left-color: var(--ok); }
.toast.warn { border-left-color: var(--accent); }
.toast.danger { border-left-color: var(--danger); }
.toast strong { display: block; font-weight: 600; }
.toast p { color: var(--muted-fg); font-size: 12px; margin-top: 2px; }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: none; }
}

/* ============================================================
   Sign-in
   ============================================================ */
.auth {
  position: fixed; inset: 0; z-index: 90;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  background: var(--bg);
}

.auth-brand {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; justify-content: space-between;
  gap: var(--sp-8);
  padding: var(--sp-8);
  color: var(--on-brand);
  background:
    radial-gradient(760px 520px at 12% 8%, rgba(255, 255, 255, .16), transparent 62%),
    radial-gradient(620px 460px at 92% 96%, color-mix(in srgb, var(--primary) 30%, transparent), transparent 64%),
    linear-gradient(152deg, var(--brand-a), var(--brand-b) 52%, var(--brand-c));
}
.auth-brand::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(760px 520px at 20% 30%, #000, transparent 72%);
  pointer-events: none;
}
.auth-brand > * { position: relative; z-index: 1; }

.auth-brand .brand-text strong { font-size: 14px; }
.auth-brand .brand-text span { color: var(--on-brand-dim); }

.auth-pitch { max-width: 420px; }
.auth-pitch h2 {
  font-size: 30px; line-height: 1.22; letter-spacing: -.025em; font-weight: 600;
}
.auth-pitch > p {
  margin-top: var(--sp-4);
  font-size: 14px; line-height: 1.65; color: var(--on-brand-dim);
}

.auth-points { display: flex; flex-direction: column; gap: var(--sp-4); margin-top: var(--sp-6); }
.auth-point { display: flex; gap: var(--sp-3); align-items: flex-start; font-size: 13px; }
.auth-point svg { flex: none; margin-top: 1px; color: var(--on-brand); opacity: .9; }
.auth-point strong { display: block; font-weight: 600; }
.auth-point span { color: var(--on-brand-dim); }

.auth-foot { font-size: 11px; color: var(--on-brand-dim); }

/* Form side ------------------------------------------------ */
.auth-panel {
  position: relative;
  display: grid; place-items: center;
  padding: var(--sp-6);
  overflow-y: auto;
}
.auth-top {
  position: absolute; top: var(--sp-5); right: var(--sp-5);
  display: flex; gap: var(--sp-2);
}
.auth-card {
  width: 100%; max-width: 392px;
  display: flex; flex-direction: column; gap: var(--sp-5);
  animation: modal-in var(--t-mid) var(--ease);
}
.auth-card h1 { font-size: 24px; letter-spacing: -.02em; }
.auth-card .lede { font-size: 13px; color: var(--muted-fg); margin-top: 6px; }

.auth-form { display: flex; flex-direction: column; gap: var(--sp-4); }

.field-affix { position: relative; }
.field-affix .input { padding-right: 44px; }
.field-affix .affix {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; padding: 0;
  display: grid; place-items: center;
  background: transparent; border: 0; border-radius: var(--r-sm);
  color: var(--muted-fg); cursor: pointer;
}
.field-affix .affix:hover { background: var(--muted); color: var(--fg); }
/* Keeps the 32px visual but gives the control a 44x44 touch target. */
.field-affix .affix::after {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 44px; height: 44px; transform: translate(-50%, -50%);
}

.field .err { font-size: 11px; color: var(--danger); font-weight: 500; }
.input[aria-invalid="true"] { border-color: var(--danger); }
.input[aria-invalid="true"]:focus { border-color: var(--danger); }

.auth-error { align-items: flex-start; }
.auth-error ul { margin: var(--sp-2) 0 0; padding-left: 18px; }
.auth-error a { color: inherit; font-weight: 600; }

.auth-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3); flex-wrap: wrap;
}
.auth-remember {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: 13px; cursor: pointer;
}
.auth-remember input {
  width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer;
}
.auth-link { font-size: 13px; font-weight: 500; background: none; border: 0; cursor: pointer; color: var(--primary); }
.auth-link:hover { text-decoration: underline; }

.btn-block { width: 100%; min-height: 44px; }
.btn[data-busy="true"] { pointer-events: none; opacity: .75; }

.spinner {
  width: 15px; height: 15px; flex: none;
  border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Demo accounts -------------------------------------------- */
.auth-demo {
  padding: var(--sp-4);
  border: 1px dashed var(--border-strong);
  border-radius: var(--r-md);
  background: var(--muted);
}
.auth-demo > p:first-child {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted-fg);
}
.auth-demo .hint { font-size: 11px; color: var(--muted-fg); margin-top: var(--sp-2); }
.demo-row { display: flex; flex-direction: column; gap: var(--sp-2); margin-top: var(--sp-3); }
.demo-acct {
  display: flex; align-items: center; gap: var(--sp-3);
  width: 100%; min-height: 44px; padding: var(--sp-2) var(--sp-3);
  font: inherit; text-align: left;
  background: var(--card); color: var(--fg);
  border: 1px solid var(--border); border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.demo-acct:hover { border-color: var(--primary); background: var(--primary-soft); }
.demo-acct .avatar { width: 28px; height: 28px; font-size: 10px; }
.demo-acct .cell-main { flex: 1; min-width: 0; }
.demo-acct .cell-main strong { font-size: 13px; }
.demo-acct .cell-main span { font-size: 11px; color: var(--muted-fg); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1180px) {
  .cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-2 { grid-column: span 2; }
  .balance-hero { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; grid-template-areas: "topbar" "main"; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: 272px;
    transform: translateX(-100%);
    transition: transform var(--t-mid) var(--ease);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.is-open { transform: none; }
  .scrim {
    position: fixed; inset: 0; z-index: 45;
    background: rgba(8, 16, 38, .5);
    display: none;
  }
  .scrim.is-on { display: block; }
  .cols-2, .cols-3 { grid-template-columns: 1fr; }
  .span-2 { grid-column: span 1; }
  .search { max-width: none; }
  .balance-stats { grid-template-columns: 1fr 1fr; }

  /* Sign-in collapses to a compact brand header above the form. */
  .auth { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .auth-brand { padding: var(--sp-5) var(--sp-6); gap: var(--sp-4); }
  .auth-brand::after { display: none; }
  .auth-pitch h2 { font-size: 20px; }
  .auth-pitch > p, .auth-points, .auth-foot { display: none; }
  .auth-panel { padding: var(--sp-6) var(--sp-4) var(--sp-8); align-items: start; }
  .auth-top { position: static; justify-content: flex-end; margin-bottom: var(--sp-3); }
  .auth-card { margin: 0 auto; }
}

@media (min-width: 901px) {
  .menu-btn { display: none; }
}

@media (max-width: 560px) {
  :root { --topbar-h: 56px; }
  .main { padding: var(--sp-4); }
  .topbar { padding: 0 var(--sp-4); gap: var(--sp-2); }
  .campus { display: none; }
  /* A 55px search box is worse than none; the Students screen carries a full one. */
  .topbar .search { display: none; }
  .topbar-right { margin-left: 0; width: 100%; justify-content: flex-end; }
  .balance-value { font-size: 34px; }
  .balance-stats { grid-template-columns: 1fr; }
  .toasts { left: var(--sp-4); right: var(--sp-4); max-width: none; }
  .screen-head .actions { width: 100%; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

/* Users table: the four account actions sit together and wrap on a narrow card. */
.row-actions { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* The one-time temporary password and its copy button. */
.temp-pass { display: flex; align-items: center; gap: var(--sp-3); }
.temp-pass code {
  flex: 1; padding: var(--sp-3) var(--sp-4); font-size: 15px; letter-spacing: .04em;
  background: var(--muted); border: 1px solid var(--border); border-radius: var(--r-md);
  overflow-wrap: anywhere; user-select: all;
}