/* Home menu: ISI colours (navy #011E41, department #084F6A, function #0B76A0, light blue #61CBF4, key focus #D4E1F5). */
:root {
  --bg: #f3f6fa; --card: #fff; --text: #011e41; --muted: #546274; --line: #d6dee8;
  --bar: #011e41; --brand: #084f6a; --accent: #0b76a0; --soft: #d4e1f5;
  --bad: #b3261e; --bad-soft: #fbe9e7; --ok: #1e7b46; --ok-soft: #e3f4ea;
  --shadow: 0 1px 2px rgba(1, 30, 65, .06), 0 2px 8px rgba(1, 30, 65, .06);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #06111f; --card: #0d1e32; --text: #e6eef7; --muted: #9cb0c6; --line: #213852;
    --bar: #011e41; --brand: #61cbf4; --accent: #61cbf4; --soft: #112d48;
    --bad: #f28b82; --bad-soft: #3a1c1a; --ok: #5cc98a; --ok-soft: #173327; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #06111f; --card: #0d1e32; --text: #e6eef7; --muted: #9cb0c6; --line: #213852;
  --bar: #011e41; --brand: #61cbf4; --accent: #61cbf4; --soft: #112d48;
  --bad: #f28b82; --bad-soft: #3a1c1a; --ok: #5cc98a; --ok-soft: #173327; --shadow: none; color-scheme: dark;
}

[hidden] { display: none !important; }
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: "Noto Sans Khmer", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.45; min-height: 100vh;
}
small { display: block; font-size: 12px; color: var(--muted); font-weight: 400; }
button { font: inherit; color: inherit; }

.bar {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; padding-top: calc(10px + env(safe-area-inset-top)); background: var(--bar); color: #fff;
}
.bar.busy { box-shadow: inset 0 -3px 0 #61cbf4; }
.brand { display: flex; align-items: center; gap: 10px; line-height: 1.15; min-width: 0; }
.brand .logo { flex: none; border-radius: 50%; background: #fff; }
.brand b { font-size: 18px; }
.brand small { color: rgba(255,255,255,.75); white-space: nowrap; }
.bar-right { display: flex; align-items: center; gap: 6px; min-width: 0; }
@media (max-width: 520px) { .who { display: none; } }
.who { font-size: 13px; color: rgba(255,255,255,.85); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 40vw; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; flex: none;
  border-radius: 10px; border: 1px solid rgba(255,255,255,.25); background: transparent; color: #fff; cursor: pointer; font-size: 17px;
}
.icon-btn:hover { background: rgba(255,255,255,.1); }

main { max-width: 1080px; margin: 0 auto; padding: 18px 16px 32px; }
.hello { margin: 2px 2px 14px; font-size: 15px; color: var(--muted); }
.hello b { color: var(--text); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.tile {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  min-height: 178px; padding: 20px 10px 16px; border-radius: 18px; text-align: center; text-decoration: none; color: var(--text);
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); cursor: pointer;
  transition: transform .12s, box-shadow .12s, border-color .12s; -webkit-tap-highlight-color: transparent;
}
.tile:hover { border-color: var(--accent); box-shadow: 0 6px 18px rgba(1, 30, 65, .12); }
.tile:active { transform: scale(.97); }
.tile .ico {
  display: flex; align-items: center; justify-content: center; width: 96px; height: 96px; border-radius: 28px; background: var(--soft);
}
.tile .ico img { width: 66px; height: 66px; display: block; }
.tile:hover .ico img { transform: scale(1.06); transition: transform .12s; }
.tile .t { font-size: 18px; font-weight: 700; line-height: 1.25; }
.tile .t small { font-size: 13px; margin-top: 2px; }
.tile.soon { cursor: default; }
.tile.soon .ico { filter: grayscale(.6); opacity: .6; }
.tile .badge {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 99px;
  background: var(--soft); color: var(--brand);
}

.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 28px 20px; text-align: center; box-shadow: var(--shadow); max-width: 440px; margin: 24px auto; }
.card .big { font-size: 46px; line-height: 1; margin-bottom: 8px; }
.card h2 { margin: 6px 0 4px; font-size: 20px; }
.card p { color: var(--muted); }
#gsiButton { display: flex; justify-content: center; min-height: 44px; margin-top: 16px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; padding: 8px 16px; margin: 4px;
  border-radius: 12px; border: 1px solid var(--line); background: var(--card); cursor: pointer; font-weight: 600;
}
.btn.ok { background: var(--brand); border-color: var(--brand); color: #fff; }
:root[data-theme="dark"] .btn.ok { color: #011e41; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.ok { color: #011e41; } }
.btn:disabled { opacity: .6; }
.alert { border-radius: 12px; padding: 10px 12px; margin: 12px 0; font-size: 14px; text-align: left; }
.alert.bad { background: var(--bad-soft); color: var(--bad); }
.alert.ok { background: var(--ok-soft); color: var(--ok); }

.spinner { width: 34px; height: 34px; margin: 60px auto; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 20;
  background: #011e41; color: #fff; padding: 10px 16px; border-radius: 12px; font-size: 14px; max-width: calc(100% - 32px); text-align: center;
}