:root {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: #0f172a;
  background: #f8fafc;
  line-height: 1.55;
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: #0369a1;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
button,
input,
select,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
:focus-visible {
  outline: 3px solid #38bdf8;
  outline-offset: 3px;
}
[hidden] {
  display: none !important;
}
header {
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
}
.header-inner,
main,
footer {
  max-width: 1160px;
  margin: auto;
  padding: 24px;
}
.header-top,
.heading,
.spread {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  font-size: 1.3rem;
  font-weight: 750;
}
.brand small {
  font-size: 0.85rem;
  font-weight: 400;
  color: #64748b;
}
.account {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.9rem;
}
nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}
nav a {
  padding: 8px 12px;
  border-radius: 8px;
}
nav a[aria-current="page"] {
  background: #e0f2fe;
  color: #075985;
}
h1 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0 0 12px;
}
h2 {
  font-size: 1.2rem;
  margin: 0 0 12px;
}
p {
  margin: 8px 0;
}
.muted,
footer {
  color: #64748b;
}
.small,
footer {
  font-size: 0.85rem;
}
.card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 2px #0f172a08;
}
.stack > * + * {
  margin-top: 24px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 20px;
}
.course {
  display: block;
  color: inherit;
}
.course:hover {
  border-color: #38bdf8;
  text-decoration: none;
}
.course .code {
  color: #0369a1;
  font-family: ui-monospace, monospace;
}
.course h2 {
  margin-top: 12px;
}
.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  background: #e2e8f0;
  color: #334155;
  font-weight: 600;
  font-size: 0.9rem;
  gap: 6px;
}
.primary {
  background: #0369a1;
  color: white;
}
.danger {
  background: #b91c1c;
  color: white;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}
label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
}
input,
select,
textarea {
  display: block;
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: white;
  color: #0f172a;
}
form > * + * {
  margin-top: 16px;
}
.field {
  max-width: 520px;
}
textarea {
  min-height: 90px;
}
.alert,
.notice,
.offline {
  padding: 14px 18px;
  border: 1px solid;
  border-radius: 8px;
  margin: 16px 0;
}
.alert {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}
.notice {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #065f46;
}
.offline {
  background: #fffbeb;
  border-color: #fde68a;
  color: #92400e;
}
.code-panel {
  background: #0f172a;
  color: white;
  text-align: center;
  border-radius: 12px;
  padding: 28px;
}
.large-code {
  font:
    700 clamp(2rem, 7vw, 3rem) ui-monospace,
    monospace;
  letter-spacing: 0.2em;
  margin: 16px 0;
}
.table-wrap {
  overflow-x: auto;
}
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 560px;
  font-size: 0.9rem;
}
th,
td {
  text-align: left;
  padding: 14px 8px;
  border-bottom: 1px solid #e2e8f0;
  vertical-align: top;
}
th {
  color: #64748b;
  font-weight: 500;
}
details {
  font-size: 0.8rem;
  margin-top: 8px;
}
summary {
  cursor: pointer;
}
.stat {
  font-size: 2rem;
  font-weight: 700;
}
.badge {
  font-size: 0.8rem;
  background: #e0f2fe;
  color: #075985;
  border-radius: 20px;
  padding: 5px 10px;
}
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}
.login .card {
  max-width: 440px;
  width: 100%;
}
.login .eyebrow {
  color: #0369a1;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
}
.login button {
  width: 100%;
}
.progress {
  height: 8px;
  background: #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
  margin: 12px 0;
}
.progress > div {
  height: 100%;
  background: #d97706;
}
.progress .met {
  background: #16a34a;
}
.list {
  list-style: none;
  padding: 0;
}
.list li {
  padding: 14px 0;
  border-bottom: 1px solid #e2e8f0;
}
.narrow {
  max-width: 800px;
}
.filter {
  max-width: 300px;
}
.queue-item {
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 14px;
  margin-top: 12px;
}
.text-button {
  padding: 0;
  background: none;
  color: #0369a1;
  text-decoration: underline;
}
.confirm {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}
@media (max-width: 600px) {
  .header-inner,
  main,
  footer {
    padding: 16px;
  }
  .card {
    padding: 18px;
  }
  .account {
    gap: 8px;
  }
  .account span {
    max-width: 150px;
  }
  nav {
    gap: 4px;
  }
  .heading {
    align-items: flex-start;
  }
  .brand small {
    display: none;
  }
}

/* Attendance workspace: persistent navigation, calm content and a live date. */
:root {
  --accent: #e87524;
  --accent-dark: #bf5410;
  --sidebar-width: 224px;
}
body.workspace {
  background: #f6f7fb;
}
body.workspace #site-header {
  background: transparent;
  border: 0;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  background: #fff;
  border-right: 1px solid #e8e9ef;
  padding: 28px 16px 18px;
  display: flex;
  flex-direction: column;
  z-index: 20;
}
.sidebar .brand {
  display: flex;
  gap: 12px;
  align-items: center;
  color: #18202b;
  padding: 0 8px 26px;
  font-size: 1.45rem;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 40px;
  border-radius: 10px;
  color: white;
  background: var(--accent);
  font-weight: 800;
  font-size: 1.5rem;
}
.sidebar .brand small {
  display: block;
  color: #8b929f;
  font-size: 0.7rem;
  font-weight: 500;
  margin-top: 1px;
}
.nav-caption {
  margin: 10px 12px 8px;
  font-size: 0.66rem;
  color: #949aa7;
  letter-spacing: 0.12em;
  font-weight: 650;
}
.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
}
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #687181;
  font-size: 0.88rem;
  padding: 12px;
  border-radius: 7px;
}
.sidebar nav a:hover {
  background: #faf7f4;
  text-decoration: none;
}
.sidebar nav a[aria-current="page"] {
  color: #b64d0d;
  background: #fff0e5;
  font-weight: 650;
}
.sidebar nav svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid #eceef3;
  padding: 20px 8px 0;
}
.profile {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}
.avatar {
  display: grid;
  place-items: center;
  background: #f0f1f5;
  color: #6b7382;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 0.75rem;
}
.profile strong {
  font-size: 0.8rem;
  font-weight: 600;
}
.profile small {
  display: block;
  font-size: 0.7rem;
  color: #9198a5;
}
.sidebar-bottom button {
  width: 100%;
  background: transparent;
  border: 1px solid #e6e8ee;
  font-weight: 500;
}
.workspace-topbar {
  margin-left: var(--sidebar-width);
  min-height: 78px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 32px;
  background: #fff;
  border-bottom: 1px solid #e8e9ef;
}
.workspace-title {
  font-size: 1rem;
  font-weight: 650;
}
.workspace-date {
  text-align: right;
  color: #475569;
  font-size: 0.8rem;
}
.workspace-date span {
  display: block;
  color: #9299a6;
  font-size: 0.68rem;
  margin-top: 3px;
}
body.workspace main {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  max-width: 1440px;
  padding: 32px;
}
body.workspace footer {
  margin-left: var(--sidebar-width);
  max-width: none;
  padding: 16px 32px;
  font-size: 0.7rem;
  color: #9aa0ac;
}
body.workspace #offline:not([hidden]) {
  margin: 16px 32px 0 calc(var(--sidebar-width) + 32px);
  max-width: none;
}
body.workspace h1 {
  font-size: clamp(1.45rem, 3vw, 1.8rem);
}
.card {
  box-shadow: 0 2px 8px #222b3b04;
  border-color: #e9ebf1;
}
.primary {
  background: var(--accent);
}
.primary:hover {
  background: var(--accent-dark);
}
.badge {
  background: #fff0e5;
  color: #b64d0d;
}
.course .code {
  color: #b64d0d;
}
.course:hover {
  border-color: #efb58e;
}
body.workspace a {
  color: #b85b20;
}
@media (max-width: 760px) {
  .sidebar {
    position: relative;
    inset: auto;
    width: 100%;
    padding: 16px;
    border-right: 0;
    border-bottom: 1px solid #e8e9ef;
  }
  .sidebar .brand {
    padding: 0 0 16px;
    width: max-content;
  }
  .sidebar .brand small {
    display: block;
  }
  .sidebar .nav-caption {
    display: none;
  }
  .sidebar nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }
  .sidebar nav a {
    padding: 9px 12px;
  }
  .sidebar-bottom {
    position: absolute;
    right: 16px;
    top: 20px;
    margin: 0;
    padding: 0;
    border: 0;
  }
  .sidebar-bottom .profile {
    display: none;
  }
  .sidebar-bottom button {
    padding: 8px 12px;
  }
  .workspace-topbar {
    margin-left: 0;
    padding: 16px;
    gap: 12px;
  }
  .workspace-date {
    max-width: 210px;
    font-size: 0.72rem;
  }
  .workspace-title {
    font-size: 0.9rem;
  }
  body.workspace main {
    margin-left: 0;
    width: 100%;
    padding: 24px 16px;
  }
  body.workspace footer {
    margin-left: 0;
    padding: 16px;
  }
  body.workspace #offline:not([hidden]) {
    margin: 12px 16px;
  }
}

input[type="checkbox"] {
  display: inline-block;
  width: auto;
  padding: 0;
  margin-right: 0.5rem;
  vertical-align: middle;
}