:root {
  /* light "public service / eID" palette (slate base + blue primary + verified green) */
  --bg: #f5f8fc;
  --bg-tint: #eef3fa;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e3e9f2;
  --border-strong: #cfd8e6;

  --navy: #0f172a;
  --text: #1b2433;
  --text-muted: #5d6b85;
  --text-faint: #94a3b8;

  --accent: #0369a1;
  --accent-strong: #075e8c;
  --accent-soft: #e3f0f9;

  --ok: #059669;
  --ok-strong: #047857;
  --ok-soft: #e2f5ee;

  --danger: #dc2626;
  --danger-soft: #fdeaea;

  --r-sm: 9px;
  --r: 13px;
  --r-lg: 18px;
  --r-pill: 999px;
  --shadow: 0 18px 40px -22px rgba(15, 23, 42, 0.28);
  --shadow-sm: 0 4px 14px -8px rgba(15, 23, 42, 0.22);
  --shadow-btn: 0 8px 18px -8px rgba(3, 105, 161, 0.5);
  --t: 180ms cubic-bezier(0.2, 0.7, 0.3, 1);

  --font: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

/* author `button{display:...}` would otherwise beat the UA [hidden] rule */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  color: var(--text);
  background:
    radial-gradient(820px 460px at 50% -6%, rgba(3, 105, 161, 0.1), transparent 60%),
    radial-gradient(640px 460px at 100% 0%, rgba(5, 150, 105, 0.07), transparent 55%),
    var(--bg);
  min-height: 100vh;
  line-height: 1.5;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(20px, 4vw, 40px) 18px 28px;
}

/* ---- footer / version badge + language switcher ---- */
.app-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 0 18px 40px;
}
.lang-switch {
  appearance: none;
  -webkit-appearance: none;
  padding: 4px 22px 4px 10px;
  border-radius: var(--r-pill);
  background: var(--surface-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 8px center / 10px;
  border: 1px solid var(--border);
  color: var(--text-faint);
  font: inherit;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--t), border-color var(--t);
}
.lang-switch:hover { color: var(--text-muted); border-color: var(--border-strong); }
.lang-switch:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  cursor: default;
  user-select: none;
  transition: color var(--t), border-color var(--t);
}
.version-badge::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px var(--ok-soft);
}
.version-badge:hover { color: var(--text-muted); border-color: var(--border-strong); }

/* ---- header / logo ---- */
header { margin-bottom: 22px; }
.logo { display: flex; align-items: center; gap: 13px; margin-bottom: 12px; }
.logo-mark {
  width: 46px; height: 46px; flex: none;
  filter: drop-shadow(0 8px 16px rgba(3, 105, 161, 0.28));
}
.logo h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4.6vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--navy);
}
.sub { color: var(--text-muted); margin: 0; font-size: 0.98rem; max-width: 54ch; }
.sub strong { color: var(--navy); font-weight: 600; }

/* ---- benefits list ---- */
.benefits { list-style: none; margin: 20px 0 2px; padding: 0; display: grid; gap: 11px; max-width: 56ch; }
.benefits li { display: flex; gap: 11px; align-items: flex-start; font-size: 0.92rem; color: var(--text-muted); line-height: 1.45; }
.benefits strong { color: var(--navy); font-weight: 600; }
.benefits .check {
  flex: none; width: 22px; height: 22px; margin-top: 1px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--ok-soft); color: var(--ok-strong);
  font-size: 0.78rem; font-weight: 800;
}
.wallet-note { text-align: center; margin-top: 12px; font-size: 0.8rem; }

/* ---- status + restart ---- */
.status {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px 15px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 18px 0 16px;
  box-shadow: var(--shadow-sm);
}
.status::before {
  content: "";
  width: 8px; height: 8px; flex: none;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.4; } }

/* ---- cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  animation: rise var(--t) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
.card h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--navy);
}
.h-ic { width: 19px; height: 19px; flex: none; color: var(--accent); }
.h-ic.ok { color: var(--ok-strong); }
.card h2 .hint { margin-left: -3px; }
.hint { color: var(--text-muted); font-size: 0.86rem; font-weight: 400; line-height: 1.45; }

.row { display: flex; gap: 9px; margin-top: 14px; }

/* ---- inputs ---- */
input[type="text"] {
  flex: 1;
  min-width: 0;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 11px 13px;
  font: inherit;
  font-size: 0.9rem;
  transition: border-color var(--t), box-shadow var(--t);
}
input[type="text"]:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input::placeholder { color: var(--text-faint); }

/* ---- buttons ---- */
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 11px 18px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--t), filter var(--t), background var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-btn);
}
button:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }
button:active:not(:disabled) { transform: translateY(0); }
button:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--accent-soft), 0 0 0 1px var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
button svg { width: 18px; height: 18px; flex: none; }

button.ghost {
  background: var(--surface);
  color: var(--navy);
  border: 1px solid var(--border-strong);
  box-shadow: none;
}
button.ghost:hover:not(:disabled) { background: var(--surface-2); }

button.danger { background: var(--danger); box-shadow: 0 8px 18px -8px rgba(220, 38, 38, 0.5); }
button.danger:focus-visible { box-shadow: 0 0 0 3px var(--danger-soft), 0 0 0 1px var(--danger); }

.restart {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
  margin: -4px 0 16px;
}
.restart:hover:not(:disabled) { background: var(--accent-soft); transform: none; filter: none; }

/* ---- QR / auth ---- */
.qr {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r);
  width: fit-content;
  margin: 14px auto 4px;
  box-shadow: var(--shadow-sm);
}
.qr img, .qr canvas { display: block; border-radius: 4px; }
.same-device {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
  width: 100%;
  margin-top: 8px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
}
.same-device:hover { text-decoration: underline; }
.same-device svg { width: 16px; height: 16px; flex: none; }

/* ---- participant chips ---- */
.ids { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
#peer-chips { display: contents; }
.id-chip {
  display: flex; align-items: center; gap: 9px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 9px 15px 9px 13px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  transition: border-color var(--t), background var(--t);
}
.id-chip .dot {
  width: 9px; height: 9px; flex: none;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background var(--t), box-shadow var(--t);
}
.id-chip.verified { border-color: rgba(5, 150, 105, 0.45); background: var(--ok-soft); color: var(--ok-strong); }
.id-chip.verified .dot { background: var(--ok); box-shadow: 0 0 0 4px var(--ok-soft); }
.id-chip.host { border-color: rgba(3, 105, 161, 0.4); background: var(--accent-soft); color: var(--accent-strong); }
.id-chip.host .dot { background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

/* ---- video tiles ---- */
.videos { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.tile {
  position: relative;
  background: #0b1220;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.tile video { width: 100%; height: 100%; object-fit: cover; background: #0b1220; }
.tile .name {
  position: absolute; left: 9px; bottom: 9px; right: 9px;
  display: inline-flex; align-items: center; gap: 6px;
  max-width: calc(100% - 18px);
  background: rgba(7, 11, 22, 0.74);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #f1f5f9;
  padding: 5px 11px; border-radius: var(--r-pill);
  font-size: 0.82rem; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tile .name.verified::before {
  content: "✓";
  color: #34d399;
  font-weight: 800;
  text-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
}
.call-controls { display: flex; justify-content: center; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
#hangup-btn svg { transform: rotate(135deg); }
#screen-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

/* ---- chat ---- */
.chat-log {
  height: 210px; overflow-y: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px;
  margin-top: 10px;
  font-size: 0.9rem;
  display: flex; flex-direction: column; gap: 7px;
}
.chat-log::-webkit-scrollbar { width: 8px; }
.chat-log::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.msg { line-height: 1.4; }
.msg .who { color: var(--accent); font-weight: 600; }
.msg.system .who { color: var(--text-faint); }

/* ---- request-config: presets + attribute checkboxes ---- */
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 4px; }
.chip-btn {
  min-height: 36px; padding: 7px 13px;
  background: var(--surface); color: var(--accent);
  border: 1px solid var(--border-strong); border-radius: var(--r-pill);
  font-size: 0.84rem; font-weight: 600; box-shadow: none;
}
.chip-btn:hover:not(:disabled) { background: var(--accent-soft); transform: none; filter: none; }
.attr-list { display: grid; gap: 3px; margin: 12px 0 6px; }
.attr-row {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: var(--r-sm);
  cursor: pointer; transition: background var(--t);
}
.attr-row:hover { background: var(--surface-2); }
.attr-row input { width: 19px; height: 19px; flex: none; accent-color: var(--accent); cursor: pointer; }
.attr-row .attr-ic { width: 17px; height: 17px; flex: none; color: var(--text-faint); }
.attr-label { font-size: 0.93rem; color: var(--navy); font-weight: 500; }
.attr-note { color: var(--text-faint); font-size: 0.8rem; font-weight: 400; }
.attr-row.locked { opacity: 0.55; cursor: default; }
.attr-row.locked input { cursor: default; }
.preview { margin: 8px 2px 0; font-size: 0.86rem; color: var(--text-muted); }
.preview strong { color: var(--navy); font-weight: 600; }

/* ---- consent list (guest) ---- */
.consent { list-style: none; margin: 12px 0; padding: 0; display: grid; gap: 8px; }
.consent li {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 13px; border-radius: var(--r-sm);
  background: var(--ok-soft); border: 1px solid rgba(5, 150, 105, 0.25);
  font-size: 0.92rem; color: var(--navy); font-weight: 500;
}
.consent li::before { content: "✓"; color: var(--ok-strong); font-weight: 800; }

/* ---- result list (verifier) ---- */
.ok-check { color: var(--ok-strong); }
.result-list { display: grid; gap: 9px; margin-top: 8px; }
.result-row {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: var(--r-sm);
  background: var(--surface-2); border: 1px solid var(--border);
}
.result-row .r-label { display: inline-flex; align-items: center; gap: 8px; font-size: 0.84rem; color: var(--text-muted); }
.result-row .r-label .attr-ic { width: 16px; height: 16px; flex: none; color: var(--text-faint); }
.result-row .r-value { font-size: 0.95rem; font-weight: 600; color: var(--navy); text-align: right; }
.result-row .r-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 11px; border-radius: var(--r-pill);
  background: var(--ok-soft); color: var(--ok-strong);
  font-size: 0.86rem; font-weight: 700;
}
/* masked field (pre-confirm review): name shown, value hidden until both agree */
.result-row.pending { border-style: dashed; background: var(--surface); }
.result-row .r-value.masked { color: var(--text-faint); letter-spacing: 3px; font-weight: 700; }

/* ---- setup: mode segmented + field labels ---- */
.field-label {
  display: block;
  margin: 18px 0 9px;
  font-size: 0.8rem; font-weight: 650; letter-spacing: 0.02em;
  color: var(--navy); text-transform: uppercase;
}
.field-note { font-weight: 400; text-transform: none; color: var(--text-faint); letter-spacing: 0; }
.field-label .h-ic { width: 15px; height: 15px; vertical-align: -2px; margin-right: 6px; color: var(--accent); }

/* ---- schedule (calendar invite) ---- */
#cal-title { display: block; width: 100%; margin: 0 0 9px; }
.schedule-fields { display: flex; gap: 9px; }
.schedule-fields input[type="date"],
.schedule-fields input[type="time"],
.schedule-fields select {
  flex: 1; min-width: 0;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 11px 13px;
  font: inherit; font-size: 0.9rem;
  transition: border-color var(--t), box-shadow var(--t);
}
.schedule-fields select { cursor: pointer; appearance: none; -webkit-appearance: none; }
.schedule-fields input:focus-visible,
.schedule-fields select:focus-visible {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.schedule-actions { margin-top: 9px; }
.seg {
  display: flex; gap: 4px; padding: 4px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--r);
}
.seg button {
  flex: 1; min-height: 38px; padding: 8px 10px;
  background: transparent; color: var(--text-muted);
  border: none; border-radius: var(--r-sm); box-shadow: none;
  font-size: 0.88rem; font-weight: 600;
}
.seg button svg { width: 17px; height: 17px; flex: none; }
.seg button:hover:not(:disabled) { transform: none; filter: none; color: var(--navy); }
.seg button.active { background: var(--surface); color: var(--accent); box-shadow: var(--shadow-sm); }
.seg button.active:disabled { color: var(--accent); opacity: 1; }

/* ---- review ---- */
.review-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 6px 0 10px; }
.review-col .field-label { margin-top: 0; }
.result-empty {
  padding: 12px 14px; border-radius: var(--r-sm);
  background: var(--surface-2); border: 1px dashed var(--border-strong);
  color: var(--text-muted); font-size: 0.88rem;
}
.review-wait { color: var(--ok-strong); font-weight: 600; }
.peer-block-head { font-size: 0.82rem; font-weight: 650; color: var(--navy); margin: 10px 0 4px; }
.peer-block-head:first-child { margin-top: 0; }

/* ---- info tooltip ---- */
.info-wrap { position: relative; display: inline-flex; vertical-align: -3px; margin-left: 4px; }
.info-btn {
  all: unset;
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; min-height: 0;
  color: var(--text-faint); cursor: pointer; border-radius: 50%;
}
.info-btn svg { width: 15px; height: 15px; }
.info-btn:hover, .info-btn:focus-visible { color: var(--accent); }
.info-btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.tooltip {
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: min(290px, 74vw);
  background: var(--navy); color: #eef2f8;
  font-size: 0.8rem; font-weight: 400; line-height: 1.45;
  letter-spacing: 0; text-transform: none;
  padding: 10px 12px; border-radius: var(--r-sm);
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; z-index: 40;
  transition: opacity var(--t), visibility var(--t);
  pointer-events: none;
}
.tooltip::after {
  content: ""; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  border: 6px solid transparent; border-top-color: var(--navy);
}
.info-wrap:hover .tooltip,
.info-btn:focus .tooltip,
.info-btn:focus-visible + .tooltip,
.info-wrap:focus-within .tooltip { opacity: 1; visibility: visible; }

/* ---- SAS security code ---- */
.sas-row { display: flex; align-items: center; gap: 14px; }
.sas-row .h-ic { flex: none; width: 22px; height: 22px; }
.sas-text { flex: 1; min-width: 0; }
.sas-text .field-label { margin: 0 0 2px; }
.sas-text .hint { margin: 0; }
.sas-code {
  flex: none;
  font-size: 1.35rem;
  letter-spacing: 0.18em;
  padding: 8px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  user-select: all;
}
@media (max-width: 560px) {
  .sas-row { flex-wrap: wrap; }
  .sas-code { flex-basis: 100%; text-align: center; }
}

/* ---- call banner (audio / chat) ---- */
.banner { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; font-weight: 600; color: var(--navy); }
.banner-dot { width: 9px; height: 9px; flex: none; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px var(--ok-soft); animation: pulse 2s ease-in-out infinite; }

/* ---- responsive ---- */
@media (max-width: 560px) {
  .videos { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .row { flex-direction: column; }
  .row button { width: 100%; }
  .schedule-fields { flex-wrap: wrap; }
  .schedule-fields select { flex-basis: 100%; }
}

/* ---- accessibility: respect reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}