/* Design tokens: all colors and shared effects stay here so the interface
   can be adjusted without hunting through individual components. */
:root {
  --bg: #0d1117;
  --panel: #151b23;
  --panel-2: #1b2430;
  --line: #2b3442;
  --text: #e8edf2;
  --muted: #9aa6b2;
  --green: #2bd576;
  --red: #ff5f57;
  --amber: #ffcc66;
  --blue: #5aa7ff;
  --cyan: #60e0d4;
  --shadow: 0 18px 50px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
.hidden { display: none !important; }

/* The page is a fixed application viewport. Scrolling is intentionally
   delegated to the sidebar and message list so header/sidebar stay usable. */
body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

/* Base form controls are intentionally compact because the app is used next
   to a simulator, often in a reduced window. */
button, input, select {
  font: inherit;
  color: inherit;
}

button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 6px;
  min-height: 38px;
  padding: 0 12px;
  cursor: pointer;
}

button:hover { border-color: #46566b; }
button:disabled { opacity: .45; cursor: not-allowed; }

input, select {
  border: 1px solid var(--line);
  background: #0f141b;
  border-radius: 6px;
  min-height: 38px;
  padding: 0 10px;
  outline: none;
}

input:focus, select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(90, 167, 255, .12);
}

/* App shell: header, main work area, and composer. */
.app {
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

/* Top status bar. It is kept outside scroll containers so connection state
   remains visible even while reading long chat history. */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: #10161f;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.mark {
  width: 42px;
  height: 42px;
  border-radius: 7px;
  display: grid;
  place-items: center;
  color: #07120d;
  background: var(--green);
  font-weight: 800;
  font-size: 20px;
}

.title {
  font-weight: 800;
  font-size: 24px;
  line-height: 1;
}

.status {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: #0f141b;
  font-size: 13px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(255, 95, 87, .1);
}

.dot.online {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(43, 213, 118, .12);
}

.settings-button {
  min-height: 32px;
  padding: 0 11px;
  font-size: 13px;
  font-weight: 800;
}

/* The left column owns radio tuning and XPDR controls. It can scroll
   independently when the window is short. */
main {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
}

.side {
  min-height: 0;
  border-right: 1px solid var(--line);
  background: #111720;
  padding: 12px;
  overflow: auto;
  overscroll-behavior: contain;
}

.work {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  background: #0d1117;
  overflow: hidden;
}

.section {
  margin-bottom: 12px;
}

.section-title {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  margin: 0 0 8px;
}

/* Radio rows use a stable grid so COM labels, manual input, TX buttons,
   and station drop-downs do not resize the layout while data arrives. */
.radio {
  display: grid;
  grid-template-columns: 54px minmax(96px, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  margin-bottom: 8px;
}

.radio-name {
  color: var(--cyan);
  font-weight: 800;
}

.radio-freq {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}

.radio input { width: 100%; }

.station-select {
  grid-column: 1 / 4;
  width: 100%;
}

/* Transponder controls intentionally mirror PilotUI's simple XPDR block:
   one squawk field, one STBY/ALT mode switch, and a momentary IDENT lamp. */
.xpdr-panel {
  display: grid;
  grid-template-columns: minmax(92px, 1fr) minmax(120px, 1.2fr) auto;
  gap: 8px;
  align-items: stretch;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
}

.xpdr-code {
  width: 100%;
  min-height: 48px;
  font-size: 26px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  letter-spacing: 0;
}

.xpdr-mode {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 48px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0f141b;
}

.xpdr-mode button {
  min-height: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
}

.xpdr-mode button.active {
  background: var(--green);
  color: #07120d;
}

.xpdr-mode button.stby.active {
  background: #323b47;
  color: #fff;
}

.xpdr-ident {
  min-width: 64px;
  min-height: 48px;
  font-weight: 800;
}

.xpdr-ident.active {
  background: var(--red);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 0 4px rgba(255, 95, 87, .16);
}

.tx-button.active {
  background: var(--red);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 0 4px rgba(255, 95, 87, .15);
}

.tx-button {
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.rx-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 30px;
  border-radius: 999px;
  background: #10161f;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.rx-light.active {
  color: #06110c;
  background: var(--green);
  border-color: transparent;
}

.voice-status {
  margin-bottom: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #0f141b;
  font-size: 12px;
  line-height: 1.35;
}

.radio-webtx-status {
  margin: 2px 0 0;
}

.voice-status.ready {
  color: #bdf7d5;
  border-color: rgba(43, 213, 118, .35);
  background: rgba(43, 213, 118, .08);
}

.voice-status.warning {
  color: #ffe1a3;
  border-color: rgba(255, 204, 102, .35);
  background: rgba(255, 204, 102, .08);
}

.voice-status.waiting {
  animation: webtx-waiting 4.8s ease-in-out infinite;
}

@keyframes webtx-waiting {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 204, 102, 0);
    transform: none;
  }
  50% {
    box-shadow: 0 0 0 3px rgba(255, 204, 102, .14);
    transform: translateY(-1px);
  }
}

.empty {
  color: var(--muted);
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  font-size: 14px;
}

/* Chat work area: toolbar stays static, only .messages scrolls. */
.toolbar {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: #10161f;
}

.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab.active {
  border-color: var(--blue);
  background: rgba(90, 167, 255, .14);
  color: #cfe5ff;
}

.tab.private-peer-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan);
}

.tab.private-peer-tab.unread {
  border-color: var(--amber);
  color: var(--amber);
}

.tab-close {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
}

.tab-close:hover {
  color: #07120d;
  background: var(--amber);
}

/* Messages are a vertical stream; outgoing messages align right so private
   conversations remain readable without extra labels. */
.messages {
  height: 100%;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 860px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 10px 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
}

.msg.outgoing {
  align-self: flex-end;
  background: #122033;
  border-color: #254669;
}

.msg.system {
  background: #171a20;
  color: var(--muted);
}

.msg.fading {
  animation: message-fade-out 1s ease forwards;
}

@keyframes message-fade-out {
  from {
    opacity: 1;
    transform: none;
  }
  to {
    opacity: 0;
    transform: translateY(-4px);
  }
}

.msg-head {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin-bottom: 4px;
  font-size: 12px;
  color: var(--muted);
}

.msg-from {
  color: var(--text);
  font-weight: 800;
}

.msg-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.35;
}

/* The composer is always visible. Commands and normal chat share one input
   because they both become simple proxy actions. */
.composer {
  display: grid;
  grid-template-columns: minmax(92px, 150px) 1fr auto;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: #10161f;
  position: relative;
  z-index: 12;
}

.composer-field {
  position: relative;
  min-width: 0;
}

.composer input { width: 100%; }

.command-menu {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(100% + 8px);
  max-height: min(320px, 48dvh);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0f141b;
  box-shadow: var(--shadow);
  padding: 4px;
  z-index: 25;
}

.command-menu.hidden { display: none; }

.command-option {
  width: 100%;
  min-height: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  padding: 8px 10px;
  display: grid;
  grid-template-columns: minmax(84px, 128px) minmax(0, 1fr);
  gap: 8px;
  text-align: left;
}

.command-option:hover,
.command-option.active {
  background: rgba(90, 167, 255, .14);
}

.command-name {
  color: var(--cyan);
  font-weight: 800;
  white-space: nowrap;
}

.command-detail {
  min-width: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.command-args {
  color: #cfe5ff;
}

.send {
  background: var(--green);
  color: #07120d;
  border-color: transparent;
  font-weight: 800;
}

/* Overlay is not a fatal error screen: it tells the user which side of the
   chain is missing while the page can still reconnect in the background. */
.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(5, 8, 12, .72);
  backdrop-filter: blur(8px);
  z-index: 20;
  padding: 18px;
}

.overlay.hidden { display: none; }

.dialog {
  width: min(480px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.dialog h1 {
  margin: 0 0 8px;
  font-size: 18px;
}

.dialog p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.dialog code {
  color: var(--cyan);
  background: #0f141b;
  padding: 2px 5px;
  border-radius: 4px;
}

/* Hosted mode starts from this account gate instead of burying login inside
   Settings. Manual relay/token setup remains available for self-host tests. */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 28;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(5, 8, 12, .76);
  backdrop-filter: blur(8px);
}

.auth-overlay.hidden { display: none; }

.auth-panel {
  width: min(540px, 100%);
  display: grid;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 18px;
}

.auth-panel h1 {
  margin: 0;
  font-size: 24px;
}

.auth-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.auth-form label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 800;
}

.auth-form input {
  width: 100%;
  text-transform: none;
  font-weight: 500;
  color: var(--text);
}

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

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

.auth-status {
  min-height: 20px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.auth-status.good { color: #bdf7d5; }
.auth-status.bad { color: #ffb4b4; }

.agent-token-box {
  border: 1px solid rgba(69, 214, 181, 0.35);
  border-radius: 6px;
  background: #0b231f;
  color: var(--cyan);
  padding: 10px;
  overflow-wrap: anywhere;
  font-family: Consolas, ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.4;
  white-space: pre-wrap;
}

/* Settings is a modal workbench for diagnostics and setup details. Keeping
   it out of the sidebar preserves the main radio workflow. */
.settings-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(5, 8, 12, .72);
  backdrop-filter: blur(8px);
}

.settings-modal.hidden { display: none; }

.settings-panel {
  width: min(760px, 100%);
  max-height: min(720px, 92dvh);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.settings-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.settings-title {
  margin: 0;
  font-size: 18px;
}

.settings-tabs {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: #10161f;
}

.settings-tab.active {
  border-color: var(--blue);
  background: rgba(90, 167, 255, .14);
  color: #cfe5ff;
}

.settings-body {
  min-height: 0;
  overflow: auto;
  padding: 14px;
}

.settings-page.hidden { display: none; }

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.setting-row {
  min-width: 0;
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0f141b;
}

.setting-label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 800;
}

.setting-value {
  min-height: 22px;
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.setting-value.good { color: #bdf7d5; }
.setting-value.warning { color: #ffe1a3; }
.setting-value.bad { color: #ffb4b4; }

.settings-form {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.settings-form label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 800;
}

.settings-form input,
.settings-form select {
  width: 100%;
  text-transform: none;
  font-weight: 500;
  color: var(--text);
}

.settings-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

/* Narrow windows stack the radio panel above chat instead of forcing a
   horizontal scroll. */
@media (max-width: 1040px) {
  main {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(160px, 34dvh) minmax(0, 1fr);
  }
  .side { border-right: 0; border-bottom: 1px solid var(--line); }
  .topbar { align-items: flex-start; }
  .composer { grid-template-columns: 1fr; }
  .radio { grid-template-columns: 58px 1fr; }
  .radio button { grid-column: span 1; }
  .station-select { grid-column: 1 / 3; }
  .xpdr-panel { grid-template-columns: minmax(96px, 1fr) minmax(120px, 1fr) auto; }
  .settings-grid { grid-template-columns: 1fr; }
  .settings-actions { grid-template-columns: 1fr; }
  .auth-actions { grid-template-columns: 1fr; }
}

/* Short windows reduce spacing and control height so the app stays usable
   beside a simulator without requiring fullscreen. */
@media (max-height: 760px) {
  .topbar { padding: 8px 12px; }
  .mark { width: 34px; height: 34px; font-size: 17px; }
  .title { font-size: 20px; }
  button, input, select { min-height: 34px; }
  .radio { gap: 6px; padding: 6px; }
  .section-title { margin-bottom: 6px; }
  .msg { padding: 8px 10px; }
}