/* ========================================================================
   SONOLINK — protocol.css (Phase 4)
   Room card · Peers card · QR modal · Encryption toggle · Per-message lock
   ======================================================================== */

/* ---------- Collapsible cards (room, peers) ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  margin-bottom: 0; /* gap handled by .modem flex */
}

.card[open] { border-color: var(--border-strong); }

.card__head {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.card__head::-webkit-details-marker { display: none; }

.card__title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  flex: 1;
}

.card__status {
  font-size: 0.7rem;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.05em;
}

.card__status[data-state="on"] {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.card__chev {
  display: inline-block;
  color: var(--text-dim);
  transition: transform 200ms ease;
  font-size: 0.75rem;
}

.card[open] .card__chev { transform: rotate(180deg); }

.card__body {
  padding: 0 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card__hint {
  font-size: 0.8125rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin: 0;
}

/* ---------- Room card specifics ---------- */

.room-pass-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.room-pass-row .field__input {
  flex: 1;
}

.room-pass-row .icon-btn {
  flex-shrink: 0;
  align-self: stretch;
  height: auto;
}

.room-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.room-actions .btn { min-height: 42px; padding: 8px 12px; font-size: 0.875rem; }

.room-qr {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 12px;
  align-items: center;
}

.room-qr__inner {
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  background: #fff;
  padding: 8px;
  border-radius: 10px;
}

.room-qr__inner svg { display: block; }

.room-qr__meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.room-qr__label {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.room-qr__id {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  word-break: break-all;
}

.room-qr__hint {
  font-size: 0.7rem;
  color: var(--text-faint);
  line-height: 1.5;
  margin-top: 4px;
}

@media (max-width: 380px) {
  .room-qr { flex-direction: column; align-items: stretch; }
  .room-qr__inner { width: 100%; height: auto; aspect-ratio: 1; }
}

/* ---------- QR scanner modal ---------- */

.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.qr-modal[hidden] { display: none; }

.qr-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.qr-modal__panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: slideUp 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.qr-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qr-modal__head h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.qr-modal__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
}

.qr-modal__viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

.qr-modal__reticle {
  position: absolute;
  inset: 18%;
  border: 2px solid var(--accent);
  border-radius: 14px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45) inset, 0 0 18px var(--accent-glow);
  pointer-events: none;
}

.qr-modal__hint {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

/* ---------- Encryption toggle in TX panel ---------- */

.enc-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}

.enc-toggle input {
  appearance: none;
  -webkit-appearance: none;
  width: 36px;
  height: 20px;
  background: var(--bg-deep);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  position: relative;
  transition: background 200ms ease, border-color 200ms ease;
  cursor: pointer;
}

.enc-toggle input::before {
  content: '';
  position: absolute;
  top: 1px;
  right: 1px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 200ms cubic-bezier(0.22, 1, 0.36, 1);
}

.enc-toggle input:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.enc-toggle input:checked::before {
  transform: translateX(-16px);
}

.enc-toggle input:checked + span {
  color: var(--accent);
}

/* ---------- Packet card additions ---------- */

.pkt--locked {
  border-color: rgba(255, 209, 102, 0.4);
  background: linear-gradient(180deg, rgba(255, 209, 102, 0.04), transparent);
}

.pkt--hello {
  border-color: rgba(91, 227, 198, 0.3);
  background: linear-gradient(180deg, rgba(91, 227, 198, 0.04), transparent);
}

.pkt--ack {
  border-color: rgba(77, 140, 255, 0.3);
  opacity: 0.85;
}

.pkt--unknown {
  border-color: rgba(255, 255, 255, 0.1);
  opacity: 0.7;
}

.pkt__from {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.pkt__from strong { color: var(--text); }

.pkt__from .dim {
  color: var(--text-faint);
  font-size: 0.7rem;
}

.pkt__lock {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  background: rgba(255, 209, 102, 0.1);
  color: #ffd166;
  border: 1px solid rgba(255, 209, 102, 0.4);
  letter-spacing: 0.05em;
}

.pkt__lock--ok {
  background: rgba(91, 227, 198, 0.12);
  color: var(--accent);
  border-color: rgba(91, 227, 198, 0.5);
}

/* ---------- Peer rows ---------- */

.peers-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 240px;
  overflow-y: auto;
}

.peers-empty {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-faint);
  padding: 16px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  line-height: 1.6;
}

.peer-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-align: right;
  cursor: pointer;
  transition: background 180ms ease, border-color 200ms ease, transform 100ms ease;
}

.peer-row:active { transform: scale(0.99); }
.peer-row:hover { border-color: var(--border-strong); }

.peer-row.is-selected {
  border-color: var(--role-color, var(--accent));
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--role-color, var(--accent)) inset, 0 0 12px rgba(0, 0, 0, 0.2);
}

.peer-row.is-offline { opacity: 0.55; }

.peer-row__icon {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--role-color, var(--text-dim));
  font-size: 1rem;
  flex-shrink: 0;
}

.peer-row__main {
  flex: 1;
  min-width: 0;
}

.peer-row__name {
  font-weight: 600;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.peer-row__sub {
  font-size: 0.7rem;
  color: var(--text-faint);
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.peer-row__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  font-size: 0.7rem;
  color: var(--text-dim);
  flex-shrink: 0;
}

.peer-row__snr {
  color: var(--accent);
  font-weight: 600;
}

.peer-row__ago { color: var(--text-faint); }

/* ---------- Target row ---------- */

.peers-target {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-deep);
  border: 1px dashed var(--border);
  border-radius: 10px;
  font-size: 0.8125rem;
}

.peers-target__label {
  color: var(--text-dim);
  flex-shrink: 0;
}

.peers-target__value {
  color: var(--text);
  flex: 1;
  font-family: 'JetBrains Mono', monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn--xs {
  min-height: 32px;
  padding: 4px 10px;
  font-size: 0.75rem;
  border-radius: 6px;
}