/* ============================================================
   IUBAT Student Verification — "Engineered / Spec-sheet"
   Technical instrument aesthetic: graph grid, mono data labels,
   hard edges, oversized index numbers. Built, not generated.
   Type: Archivo (display) · IBM Plex Mono (data) · IBM Plex Sans (body)
   ============================================================ */

:root {
  --paper:#eef1ec;
  --sheet:#fbfcfa;
  --ink:#13180f;
  --ink-2:#3b4438;
  --muted:#6c7669;
  --green:#0f6b3f;
  --green-2:#0b5733;
  --crimson:#d2102f;
  --crimson-2:#a50d25;
  --line:#cdd5cb;
  --line-strong:#11160f;
  --grid: rgba(17,22,15,.05);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  background-color: var(--paper);
  /* graph-paper grid */
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 22px 22px;
  min-height: 100vh;
}

.frame {
  max-width: 470px;
  margin: 0 auto;
  padding: 0 16px calc(22px + env(safe-area-inset-bottom));
  min-height: 100vh;
}

/* ---------- top meta bar ---------- */
.meta {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: calc(16px + env(safe-area-inset-top)) 2px 12px;
  border-bottom: 1.5px solid var(--line-strong);
  margin-bottom: -1.5px;
}
.meta__id { display: flex; align-items: center; gap: 10px; min-width: 0; }
.meta__logo {
  width: 34px; height: 34px; object-fit: contain;
  border: 1.5px solid var(--line-strong); background: #fff; padding: 3px;
}
.meta__sys {
  font-family: "IBM Plex Mono", monospace; font-weight: 600; font-size: .8rem;
  letter-spacing: .5px; color: var(--ink); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.meta__sys i { color: var(--crimson); font-style: normal; margin: 0 2px; }
.meta__doc {
  font-family: "IBM Plex Mono", monospace; font-size: .68rem; letter-spacing: .5px;
  color: var(--muted); white-space: nowrap;
}

/* ---------- the sheet ---------- */
.sheet {
  position: relative;
  background: var(--sheet);
  border: 1.5px solid var(--line-strong);
  padding: 26px 22px 28px;
  animation: boot .35s linear both;
}
/* registration / crop marks at corners */
.sheet__corner { position: absolute; width: 9px; height: 9px; pointer-events: none; }
.sheet__corner--tl { top: -1.5px; left: -1.5px; border-top: 1.5px solid var(--crimson); border-left: 1.5px solid var(--crimson); }
.sheet__corner--tr { top: -1.5px; right: -1.5px; border-top: 1.5px solid var(--crimson); border-right: 1.5px solid var(--crimson); }
.sheet__corner--bl { bottom: -1.5px; left: -1.5px; border-bottom: 1.5px solid var(--crimson); border-left: 1.5px solid var(--crimson); }
.sheet__corner--br { bottom: -1.5px; right: -1.5px; border-bottom: 1.5px solid var(--crimson); border-right: 1.5px solid var(--crimson); }

/* ---------- section index header ---------- */
.idx {
  display: flex; align-items: baseline; gap: 12px;
  border-bottom: 1px dashed var(--line); padding-bottom: 14px; margin-bottom: 18px;
}
.idx__num {
  font-family: "Archivo", sans-serif; font-weight: 800; font-size: 2.7rem;
  line-height: .85; color: var(--ink); letter-spacing: -1px;
}
.idx__meta { display: flex; flex-direction: column; }
.idx__tag {
  font-family: "IBM Plex Mono", monospace; font-size: .7rem; font-weight: 600;
  letter-spacing: 2px; color: var(--crimson);
}
.idx__step { font-family: "IBM Plex Mono", monospace; font-size: .7rem; color: var(--muted); letter-spacing: 1px; }

.title {
  font-family: "Archivo", sans-serif; font-weight: 800; font-size: 1.74rem;
  line-height: 1.05; letter-spacing: -.6px; margin: 0 0 8px; color: var(--ink);
  text-transform: none;
}
.title .accent { color: var(--crimson); }
.lead { color: var(--ink-2); margin: 0 0 6px; font-size: .98rem; }
.lead strong { color: var(--ink); font-weight: 600; }

/* ---------- fields ---------- */
.field { margin-top: 18px; }
.lbl {
  display: flex; align-items: center; gap: 8px;
  font-family: "IBM Plex Mono", monospace; font-size: .72rem; font-weight: 600;
  letter-spacing: 1.5px; color: var(--ink-2); margin-bottom: 8px; text-transform: uppercase;
}
.lbl::before { content: "▸"; color: var(--green); font-size: .7rem; }
.req { color: var(--crimson); margin-left: auto; }

input[type=text], input[type=tel], input[type=email] {
  width: 100%; min-height: 52px; padding: 13px 14px;
  font-family: "IBM Plex Mono", monospace; font-size: 16px; color: var(--ink);
  border: 1.5px solid var(--line-strong); border-radius: 0; background: #fff;
  transition: box-shadow .12s, border-color .12s;
}
input::placeholder { color: #aab3a5; }
input:focus {
  outline: none; border-color: var(--crimson);
  box-shadow: 4px 4px 0 0 rgba(210,16,47,.18);
}
input[readonly] {
  background: repeating-linear-gradient(135deg, #f1f4ef, #f1f4ef 7px, #eaeee7 7px, #eaeee7 8px);
  color: var(--ink-2); cursor: not-allowed;
}
.hint {
  font-family: "IBM Plex Mono", monospace; font-size: .72rem; color: var(--muted);
  margin: 7px 0 0; letter-spacing: .3px;
}

/* readonly name + flag */
.flag {
  display: inline-flex; align-items: center; gap: 9px; margin-top: 9px;
  font-family: "IBM Plex Mono", monospace; font-size: .76rem; color: var(--muted);
  cursor: pointer; user-select: none; letter-spacing: .4px;
}
.flag input { width: 18px; height: 18px; accent-color: var(--crimson); }

/* ---------- blood group matrix ---------- */
.bg-head {
  display: flex; align-items: center; gap: 8px; margin: 24px 0 4px;
  font-family: "IBM Plex Mono", monospace; font-size: .72rem; font-weight: 600;
  letter-spacing: 1.5px; color: var(--ink-2); text-transform: uppercase;
}
.bg-head::before { content: "▸"; color: var(--green); }
.bg-sub { font-family: "IBM Plex Mono", monospace; font-size: .68rem; color: var(--muted); margin: 0 0 11px; letter-spacing: .3px; }

.matrix {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1.5px solid var(--line-strong); border-bottom: 0; border-right: 0;
}
.cell { position: relative; }
.cell input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.cell span {
  display: flex; align-items: center; justify-content: center;
  min-height: 56px; border-right: 1.5px solid var(--line-strong); border-bottom: 1.5px solid var(--line-strong);
  font-family: "Archivo", sans-serif; font-weight: 700; font-size: 1.12rem; color: var(--ink);
  background: #fff; transition: background .1s, color .1s;
}
.cell.unknown { grid-column: span 4; }
.cell.unknown span { font-family: "IBM Plex Mono", monospace; font-weight: 500; font-size: .82rem; letter-spacing: 1px; color: var(--muted); text-transform: uppercase; }
.cell input:hover + span { background: #f3f6f1; }
.cell input:focus-visible + span { outline: 2px solid var(--crimson); outline-offset: -3px; }
.cell input:checked + span {
  background: var(--crimson); color: #fff;
}
.cell input:checked + span::after {
  content: "■"; position: absolute; top: 4px; right: 6px; font-size: .5rem; color: rgba(255,255,255,.85);
}

/* ---------- button ---------- */
button.btn {
  width: 100%; min-height: 56px; margin-top: 26px;
  font-family: "IBM Plex Mono", monospace; font-size: .92rem; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; color: #fff; background: var(--ink);
  border: 1.5px solid var(--ink); border-radius: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: background .12s, transform .08s, box-shadow .12s;
  box-shadow: 5px 5px 0 0 var(--green);
}
button.btn:hover { background: var(--green); border-color: var(--green); box-shadow: 5px 5px 0 0 var(--ink); }
button.btn:active { transform: translate(3px,3px); box-shadow: 2px 2px 0 0 var(--green); }
button.btn .arrow { color: var(--crimson); font-weight: 700; }
button.btn:hover .arrow { color: #fff; }

/* ---------- errors ---------- */
.error {
  margin: 10px 0 0; font-family: "IBM Plex Mono", monospace; font-size: .76rem; font-weight: 500;
  color: #fff; background: var(--crimson); padding: 9px 12px; letter-spacing: .4px;
  border-left: 5px solid var(--crimson-2);
}
.error::before { content: "ERR "; font-weight: 600; }

/* ---------- result pages ---------- */
.result { text-align: left; }
.stamp {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: "IBM Plex Mono", monospace; font-size: .74rem; font-weight: 600; letter-spacing: 2px;
  padding: 8px 14px; border: 1.5px solid var(--green); color: var(--green);
  text-transform: uppercase; margin-bottom: 18px;
}
.stamp.bad { border-color: var(--crimson); color: var(--crimson); }
.stamp .tick { font-size: 1rem; }
.result .big {
  font-family: "Archivo", sans-serif; font-weight: 900; font-size: 2.6rem; line-height: .95;
  letter-spacing: -1.5px; margin: 6px 0 14px;
}
.result .big .accent { color: var(--crimson); }
.result p { color: var(--ink-2); margin: 8px 0 0; }
.result .mono {
  font-family: "IBM Plex Mono", monospace; font-size: .76rem; color: var(--muted);
  margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); letter-spacing: .3px;
}

/* ---------- error pages (404 / 500) ---------- */
/* Namespaced under .errpage to avoid the existing .error form-banner rule above. */
.errpage { text-align: left; padding: 8px 0 4px; }
.errpage__code {
  font-family: "Archivo", sans-serif; font-weight: 900; font-size: 5.2rem; line-height: .9;
  letter-spacing: -3px; color: var(--ink); margin: 6px 0 2px;
}
.errpage__code .accent { color: var(--crimson); }
.errpage__label {
  display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: .72rem;
  font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  padding: 6px 12px; border: 1.5px solid var(--crimson); color: var(--crimson); margin-bottom: 16px;
}
.errpage h1 {
  font-family: "Archivo", sans-serif; font-weight: 800; font-size: 1.5rem;
  letter-spacing: -.5px; margin: 4px 0 8px;
}
.errpage p { color: var(--ink-2); margin: 8px 0 0; }
.errpage .mono {
  font-family: "IBM Plex Mono", monospace; font-size: .72rem; color: var(--muted);
  margin-top: 20px; padding-top: 14px; border-top: 1px dashed var(--line); letter-spacing: .3px;
}

/* ---------- system footer ---------- */
.sysline {
  display: flex; flex-wrap: wrap; gap: 14px;
  font-family: "IBM Plex Mono", monospace; font-size: .66rem; color: var(--muted);
  letter-spacing: .8px; padding: 12px 2px 0; margin-top: 14px;
  border-top: 1.5px solid var(--line-strong);
}

/* ---------- motion ---------- */
@keyframes boot { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

@media (min-width: 540px) { .meta { padding-top: 24px; } }

.idcard {
  display: block; width: 100%; height: auto; margin: 18px 0 4px;
  border: 1.5px solid var(--line-strong);
  box-shadow: 6px 6px 0 0 var(--green);
}