/* мост — base styles
 * Mobile-first. System fonts only (per README §9).
 * No framework. CSS class prefix is .bridge- (per naming convention).
 */

:root {
  --bridge-bg: #0f172a;
  --bridge-bg-elev: #1e293b;
  --bridge-fg: #e2e8f0;
  --bridge-muted: #94a3b8;
  --bridge-accent: #38bdf8;
  --bridge-accent-fg: #0c1828;
  --bridge-danger: #f87171;
  --bridge-warn: #fbbf24;
  --bridge-border: #334155;

  --bridge-radius: 0.5rem;
  --bridge-pad: 0.75rem;
  --bridge-tap: 2.75rem; /* min touch target */
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bridge-bg);
  color: var(--bridge-fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

body {
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
}

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

/* --- landing ----------------------------------------------------------- */

.bridge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--bridge-pad) 1rem;
  border-bottom: 1px solid var(--bridge-border);
}

.bridge-brand {
  font-size: 2.25rem;
  margin: 0;
  letter-spacing: -0.02em;
}

.bridge-brand-small {
  font-size: 1.25rem;
  font-weight: 600;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
.bridge-brand-small:hover { opacity: 0.85; }
.bridge-brand-small:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.bridge-lang {
  background: var(--bridge-bg-elev);
  color: var(--bridge-fg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 0.4rem 0.6rem;
  min-height: var(--bridge-tap);
}

.bridge-landing {
  min-height: calc(100dvh - 4rem);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 1.5rem;
  gap: 1rem;
  max-width: 28rem;
  margin: 0 auto;
}

.bridge-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bridge-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--bridge-bg-elev);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 1rem;
}

.bridge-panel h2 {
  margin: 0;
  font-size: 1.25rem;
}

.bridge-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.bridge-field span {
  color: var(--bridge-muted);
  font-size: 0.9rem;
}

.bridge-field input {
  background: var(--bridge-bg);
  color: var(--bridge-fg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 0.6rem 0.75rem;
  min-height: var(--bridge-tap);
}

.bridge-field input:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 1px;
}

.bridge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.bridge-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: var(--bridge-tap);
  padding: 0 1rem;
  background: var(--bridge-bg-elev);
  color: var(--bridge-fg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  cursor: pointer;
}

.bridge-btn:hover { background: #273549; }
.bridge-btn:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 1px;
}

.bridge-btn-primary {
  background: var(--bridge-accent);
  color: var(--bridge-accent-fg);
  border-color: transparent;
  font-weight: 600;
}
.bridge-btn-primary:hover { filter: brightness(1.05); background: var(--bridge-accent); }

.bridge-btn-ghost {
  background: transparent;
  border-color: var(--bridge-border);
  color: var(--bridge-muted);
}

.bridge-error {
  color: var(--bridge-danger);
  margin: 0;
  font-size: 0.9rem;
}

/* --- chat -------------------------------------------------------------- */

.bridge-chat-body {
  display: grid;
  grid-template-rows: auto auto 1fr auto auto;
  height: 100dvh;
  overflow: hidden;
}

.bridge-chat-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: var(--bridge-pad) 1rem;
  border-bottom: 1px solid var(--bridge-border);
  background: var(--bridge-bg);
}

.bridge-pin {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.05rem;
  margin-left: auto;
  margin-right: 0.5rem;
  color: var(--bridge-muted);
  font-size: 0.95rem;
  line-height: 1.15;
}
.bridge-pin-row {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}
.bridge-pin strong {
  color: var(--bridge-fg);
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
}

.bridge-roster {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--bridge-border);
  background: var(--bridge-bg);
}

.bridge-roster-count {
  color: var(--bridge-muted);
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.bridge-roster-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.bridge-roster-item {
  background: var(--bridge-bg-elev);
  border: 1px solid var(--bridge-border);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.9rem;
}

.bridge-offline {
  opacity: 0.55;
  text-decoration: line-through;
}

.bridge-log {
  overflow-y: auto;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bridge-bg);
}

.bridge-line {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  max-width: 90%;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.bridge-line-chat {
  background: var(--bridge-bg-elev);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 0.5rem 0.75rem;
}

.bridge-line-self {
  align-self: flex-end;
  background: #1e3a52;
  border-color: #2a4a6a;
}

.bridge-line-meta {
  font-size: 0.75rem;
  color: var(--bridge-muted);
}

.bridge-line-system {
  align-self: center;
  font-size: 0.85rem;
  color: var(--bridge-muted);
  font-style: italic;
}

.bridge-composer {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--bridge-border);
  background: var(--bridge-bg);
}

.bridge-composer input {
  flex: 1;
  min-height: var(--bridge-tap);
  background: var(--bridge-bg-elev);
  color: var(--bridge-fg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 0 0.75rem;
}
.bridge-composer input:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 1px;
}

.bridge-actionbar {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 1rem max(0.5rem, env(safe-area-inset-bottom)) 1rem;
  border-top: 1px solid var(--bridge-border);
  background: var(--bridge-bg);
}

.bridge-media {
  /* M2: audio elements only — no visual presence beyond the playback indicator. */
  display: none;
}

.bridge-mic.bridge-mic-active {
  background: var(--bridge-danger);
  color: #1a0606;
  border-color: transparent;
  font-weight: 600;
}

.bridge-roster-item.bridge-has-audio::before {
  content: '\1F3A4';  /* microphone */
  margin-right: 0.25rem;
}

.bridge-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  background: var(--bridge-warn);
  color: #1a1306;
  text-align: center;
  padding: 0.5rem 1rem;
  font-weight: 600;
}

@media (min-width: 720px) {
  .bridge-chat-body {
    max-width: 48rem;
    margin: 0 auto;
    border-left: 1px solid var(--bridge-border);
    border-right: 1px solid var(--bridge-border);
  }
}

/* --- *Ваши комнаты* (README §16) --------------------------------- */

.bridge-rooms-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--bridge-border);
  margin-bottom: 0.5rem;
}

.bridge-rooms-wrap h2 {
  margin: 0;
  font-size: 1rem;
  color: var(--bridge-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.bridge-rooms-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.bridge-rooms-item {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: baseline;
  gap: 0.6rem;
  min-height: var(--bridge-tap);
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
  background: var(--bridge-bg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  cursor: pointer;
  user-select: none;
}
.bridge-rooms-item:hover { background: #273549; }
.bridge-rooms-item:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 1px;
}

.bridge-rooms-pin {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.bridge-rooms-name {
  color: var(--bridge-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bridge-rooms-expires {
  color: var(--bridge-muted);
  font-size: 0.8rem;
}

.bridge-rooms-forget {
  background: transparent;
  border: 0;
  color: var(--bridge-muted);
  font-size: 1.4rem;
  line-height: 1;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  align-self: center;
}
.bridge-rooms-forget:hover {
  color: var(--bridge-danger);
  background: rgba(248, 113, 113, 0.12);
}
.bridge-rooms-forget:focus-visible {
  outline: 2px solid var(--bridge-accent);
  outline-offset: 1px;
}

.bridge-actions-row {
  /* Reserved class for legacy markup; the M3 landing has no nav buttons. */
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* --- chat header expiry small ------------------------------------------ */

.bridge-pin-expires {
  color: var(--bridge-muted);
  font-size: 0.7rem;
  white-space: nowrap;
}

/* --- toast ------------------------------------------------------------- */

.bridge-toast {
  position: fixed;
  left: 50%;
  bottom: max(1rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 20;
  background: var(--bridge-bg-elev);
  color: var(--bridge-fg);
  border: 1px solid var(--bridge-border);
  border-radius: var(--bridge-radius);
  padding: 0.6rem 1rem;
  max-width: calc(100vw - 2rem);
  text-align: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}