:root {
  --bg: #f3f6fa;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #d7dde7;
  --primary: #005f73;
  --primary-2: #0a9396;
  --nav: #102a43;
  --gold: #e9b949;
  --good: #067647;
  --warn: #b54708;
  --bad: #b42318;
  --info: #175cd3;
  --radius: 8px;
  font-family: "Noto Sans Thai", "Segoe UI", Tahoma, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  letter-spacing: 0;
}

a { color: inherit; }
button, input, select, textarea { font: inherit; }

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.side {
  background: var(--nav);
  color: #fff;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: var(--nav);
  font-weight: 800;
}

.brand strong { display: block; font-size: 15px; }
.brand span { display: block; color: #c8d7e6; font-size: 12px; margin-top: 2px; }

.menu {
  display: grid;
  gap: 6px;
}

.menu a {
  text-decoration: none;
  color: #dbe7f3;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
}

.menu a.active,
.menu a:hover {
  background: #fff;
  color: var(--nav);
  font-weight: 700;
}

.side-note {
  margin-top: auto;
  border-top: 1px solid rgba(255,255,255,.18);
  padding-top: 16px;
  color: #c8d7e6;
  font-size: 12px;
  line-height: 1.6;
}

.main { min-width: 0; }

.top {
  min-height: 74px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.title h1 { margin: 0; font-size: 22px; line-height: 1.25; }
.title p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

.tools {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.btn {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 0 12px;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn.danger {
  border-color: #fecdca;
  color: var(--bad);
}

.content {
  padding: 24px 28px 36px;
  display: grid;
  gap: 18px;
}

.panel,
.metric,
.login-card,
.a4 {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel h2 {
  margin: 0;
  padding: 16px 18px 0;
  font-size: 16px;
}

.body { padding: 16px 18px 18px; }

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .9fr);
  gap: 18px;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric { padding: 16px; }
.metric span { display: block; color: var(--muted); font-size: 12px; }
.metric strong { display: block; margin-top: 8px; font-size: 28px; line-height: 1; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.filters {
  display: grid;
  grid-template-columns: 1fr 170px 170px 120px;
  gap: 10px;
  margin-bottom: 12px;
}

.wide { grid-column: 1 / -1; }

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: #344054;
}

input, select, textarea {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 10px 11px;
}

textarea { min-height: 94px; resize: vertical; }

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  padding: 11px 10px;
  border-bottom: 1px solid #eaecf0;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f9fafb;
  color: #475467;
  font-size: 12px;
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 8px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.pending { background: #f2f4f7; color: #344054; }
.consented { background: #ecfdf3; color: var(--good); }
.rejected { background: #fef3f2; color: var(--bad); }
.expired { background: #fffaeb; color: var(--warn); }
.sent { background: #eff8ff; color: var(--info); }

.notice {
  border: 1px solid #b2ddff;
  background: #eff8ff;
  color: #1849a9;
  border-radius: 8px;
  padding: 12px;
  font-size: 13px;
  line-height: 1.55;
}

.card-list {
  display: grid;
  gap: 10px;
}

.row-card {
  border: 1px solid #eaecf0;
  border-radius: 8px;
  padding: 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

.row-card strong { display: block; }
.row-card span { display: block; color: var(--muted); font-size: 13px; margin-top: 3px; }

.student-input-row {
  display: grid;
  grid-template-columns: 36px 1fr 1fr 1fr 44px;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
}

.row-no {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #e6f4f1;
  color: var(--primary);
  font-weight: 800;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, #102a43 0%, #005f73 60%, #0a9396 100%);
}

.login-card {
  width: min(460px, 100%);
  padding: 28px;
}

.login-card h1 { margin: 0 0 6px; font-size: 24px; }
.login-card p { margin: 0 0 18px; color: var(--muted); }

.a4 {
  width: min(794px, 100%);
  min-height: 1123px;
  margin: 0 auto;
  padding: 48px;
  background: #fff;
}

.a4-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 2px solid var(--nav);
  padding-bottom: 18px;
  margin-bottom: 24px;
}

.seal {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: var(--nav);
  font-weight: 900;
}

.cert-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 10px 18px;
  margin-top: 24px;
}

.cert-grid div:nth-child(odd) {
  color: var(--muted);
}

.signature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 80px;
}

.signature {
  border-top: 1px solid var(--ink);
  padding-top: 10px;
  text-align: center;
  color: var(--muted);
}

@media print {
  body { background: #fff; }
  .side, .top, .tools { display: none; }
  .layout { display: block; }
  .content { padding: 0; }
  .a4 { border: 0; border-radius: 0; min-height: auto; }
}

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .menu { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metrics, .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2, .filters, .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .top { align-items: flex-start; flex-direction: column; padding: 16px; }
  .content { padding: 16px; }
  .menu, .metrics, .grid-3 { grid-template-columns: 1fr; }
  .student-input-row { grid-template-columns: 36px 1fr; }
  .student-input-row .btn { grid-column: 2; }
  table { min-width: 760px; }
  .a4 { padding: 28px 20px; min-height: auto; }
  .a4-header, .signature-row { grid-template-columns: 1fr; display: grid; }
}