/* SecureChat — phosphor terminal theme. No external fonts (CSP: font-src 'self'). */
:root {
  --bg: #000;
  --fg: #33ff66;          /* P1 phosphor */
  --fg-bright: #b6ffc8;
  --fg-dim: #1c8a3c;
  --fg-faint: #0e3f1c;
  --warn: #ffc93c;
  --err: #ff5b5b;
  --line: #0f2a17;
  --glow: 0 0 6px rgba(51, 255, 102, .45);
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  --fs: clamp(13px, 3.4vw, 15px);
  --side-w: 260px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
/* the hidden attribute must always win, even over display:flex overlays below */
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; background: var(--bg); }
body {
  color: var(--fg); font: var(--fs)/1.5 var(--mono); text-shadow: var(--glow);
  -webkit-font-smoothing: antialiased; overflow: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
button, input, select { font: inherit; color: inherit; }
::selection { background: var(--fg); color: #000; text-shadow: none; }
:focus-visible { outline: 1px dashed var(--fg-bright); outline-offset: 2px; }

/* CRT scanlines — static, subtle */
body::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 50;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0 2px, rgba(0,0,0,.22) 2px 3px);
}

.term {
  height: 100%;                  /* fallback */
  height: 100dvh;                /* modern dynamic viewport */
  height: var(--app-h, 100dvh);  /* keyboard-aware value set by app.js */
  display: grid;
  grid-template-columns: var(--side-w) 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas: "bar bar" "side main";
  overflow: hidden;
}
.term-bar {
  grid-area: bar; display: flex; align-items: center; gap: .75rem;
  padding: .5rem .9rem; border-bottom: 1px solid var(--line); min-height: 44px;
}
.term-title { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.term-title b { color: var(--fg-bright); font-weight: 400; }
.conn { font-size: .8em; color: var(--fg-faint); text-shadow: none; }
.conn.on { color: var(--fg); text-shadow: var(--glow); }
.conn.poll { color: var(--warn); }

.icon-btn, .side-btn, .send-btn, .btn {
  background: transparent; border: 1px solid var(--fg-dim); padding: .35rem .7rem; cursor: pointer;
  text-shadow: inherit; min-height: 36px; min-width: 36px;
}
.icon-btn:hover, .side-btn:hover, .send-btn:hover, .btn:hover { background: var(--fg); color: #000; text-shadow: none; }
#btn-menu { display: none; }

.sidebar {
  grid-area: side; border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0;
}
.side-head { padding: .6rem .9rem; color: var(--fg-dim); border-bottom: 1px solid var(--line); }
#conv-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
#conv-list button {
  width: 100%; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line);
  padding: .65rem .9rem; cursor: pointer; display: flex; gap: .5rem; align-items: baseline; text-shadow: inherit;
}
#conv-list button:hover { background: var(--fg-faint); }
#conv-list button.active { background: var(--fg); color: #000; text-shadow: none; }
#conv-list .n { color: var(--fg-dim); }
#conv-list button.active .n { color: #000; }
#conv-list .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#conv-list .badge { color: #000; background: var(--warn); padding: 0 .35rem; text-shadow: none; }
.side-btn { margin: .6rem; }

.screen { grid-area: main; display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.output {
  flex: 1; overflow-y: auto; padding: .8rem 1rem; overscroll-behavior: contain;
  word-wrap: break-word; overflow-wrap: anywhere;
}
.ln { white-space: pre-wrap; margin: 0 0 .15rem; }
.ln.dim { color: var(--fg-dim); }
.ln.ok { color: var(--fg-bright); }
.ln.warn { color: var(--warn); text-shadow: 0 0 6px rgba(255,201,60,.4); }
.ln.err { color: var(--err); text-shadow: 0 0 6px rgba(255,91,91,.4); }
.ln.echo { color: var(--fg-dim); }
.msg { display: grid; grid-template-columns: auto auto 1fr; gap: .5rem; margin: 0 0 .25rem; }
.msg .t { color: var(--fg-dim); }
.msg .who { color: var(--fg); }
.msg.mine .who { color: var(--fg-bright); }
.msg .txt { white-space: pre-wrap; }
.msg.pending { opacity: .55; }
.msg.bad .txt { color: var(--warn); }

.prompt {
  display: flex; align-items: center; gap: .5rem; border-top: 1px solid var(--line);
  padding: .55rem .9rem;
}
#prompt-label { color: var(--fg-bright); white-space: nowrap; }
#prompt-input {
  flex: 1; min-width: 0; background: transparent; border: 0; outline: none; caret-color: var(--fg);
  font-size: max(16px, var(--fs)); /* ≥16px stops iOS zoom-on-focus */ padding: .4rem 0; text-shadow: inherit;
}
#prompt-input::placeholder { color: var(--fg-faint); }
#prompt-input:disabled { opacity: .5; }

.cursor::after { content: "▌"; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.scrim { display: none; }

/* ---------------- call UI & overlays ---------------- */
#remote-audio { display: none; }
/* ALL overlays MUST be hidden by default with highest specificity */
#call-ui,
.call-ui,
#walkie-ui,
.walkie-ui,
#settings-ui,
.sheet {
  position: fixed !important;
  inset: 0 !important;
  z-index: 60 !important;
  display: none !important;
  align-items: center !important;
  justify-content: center !important;
  background: rgba(0, 0, 0, 0.85) !important;
  padding: 1rem !important;
  padding-top: calc(env(safe-area-inset-top) + 1rem) !important;
}

/* ONLY display when explicitly having .open class AND NOT having [hidden] */
#call-ui.open:not([hidden]),
.call-ui.open:not([hidden]),
#walkie-ui.open:not([hidden]),
.walkie-ui.open:not([hidden]),
#settings-ui.open:not([hidden]),
.sheet.open:not([hidden]) {
  display: flex !important;
}

/* If [hidden] is present, ALWAYS display: none */
#call-ui[hidden],
.call-ui[hidden],
#walkie-ui[hidden],
.walkie-ui[hidden],
#settings-ui[hidden],
.sheet[hidden],
[hidden] {
  display: none !important;
}
.call-card {
  position: relative;
  border: 1px solid var(--fg-dim); background: var(--bg); padding: 1.4rem 1.5rem;
  width: min(92vw, 340px); text-align: center; box-shadow: var(--glow);
}
.call-close-btn {
  position: absolute; top: .6rem; right: .6rem; min-height: 28px; min-width: 28px;
  padding: .15rem .45rem; background: transparent; border: 1px solid var(--fg-dim); cursor: pointer;
  color: var(--fg-dim);
}
.call-close-btn:hover { background: var(--err); color: #000; border-color: var(--err); }
.call-icon { font-size: 2.6rem; line-height: 1; margin-bottom: .7rem; color: var(--fg); }
.call-who { color: var(--fg-bright); font-size: 1.25em; margin-bottom: .35rem; word-break: break-word; }
.call-status { color: var(--fg-dim); margin-bottom: 1.2rem; min-height: 1.2em; }
.call-actions { display: flex; gap: .6rem; justify-content: center; flex-wrap: wrap; }
.call-accept { border-color: var(--fg); color: var(--fg-bright); }
.call-accept:hover { background: var(--fg); color: #000; }
.call-end { border-color: var(--err); color: var(--err); }
.call-end:hover { background: var(--err); color: #000; }
/* pulsing rings while audio is live */
#call-ui[data-state="active"] .call-icon,
#call-ui[data-state="incoming"] .call-icon { animation: callpulse 1.2s ease-out infinite; border-radius: 50%; }
@keyframes callpulse {
  0%   { text-shadow: 0 0 0 rgba(51,255,102,.9), 0 0 0 rgba(51,255,102,.5); transform: scale(1); }
  70%  { text-shadow: 0 0 22px rgba(51,255,102,.0), 0 0 40px rgba(51,255,102,.0); transform: scale(1.12); }
  100% { text-shadow: 0 0 0 rgba(51,255,102,0); transform: scale(1); }
}

/* ---------------- walkie-talkie UI ---------------- */
.walkie-card {
  position: relative; border: 1px solid var(--fg-dim); background: var(--bg); padding: 1.2rem 1.4rem;
  width: min(92vw, 360px); text-align: center; box-shadow: var(--glow);
}
.walkie-head {
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line); padding-bottom: .6rem; margin-bottom: .9rem;
  color: var(--fg-bright); font-size: 1.05em;
}
.walkie-channel { font-size: .95em; color: var(--fg-dim); margin-bottom: .5rem; }
.walkie-channel b { color: var(--fg-bright); }
.walkie-status {
  font-size: 1.1em; color: var(--fg-bright); padding: .35rem .6rem;
  border: 1px dashed var(--fg-dim); display: inline-block; margin-bottom: 1rem;
  letter-spacing: .08em; min-width: 170px;
}
.walkie-status.tx {
  color: #000; background: var(--fg); border-color: var(--fg);
  font-weight: bold; text-shadow: none; animation: txblink .6s infinite alternate;
}
.walkie-status.rx {
  color: var(--warn); border-color: var(--warn);
}
@keyframes txblink { from { opacity: 1; } to { opacity: .7; } }
.walkie-btn {
  width: 100%; min-height: 85px; background: transparent; border: 2px solid var(--fg);
  color: var(--fg-bright); font-size: 1.25em; font-weight: bold; cursor: pointer;
  box-shadow: var(--glow); display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: .3rem; user-select: none; -webkit-user-select: none;
  touch-action: none; text-shadow: var(--glow); transition: all .1s ease;
}
.walkie-btn:active, .walkie-btn.transmitting {
  background: var(--fg); color: #000; text-shadow: none; transform: scale(0.98);
}
.walkie-btn small { font-size: .6em; font-weight: normal; color: var(--fg-dim); }
.walkie-btn:active small, .walkie-btn.transmitting small { color: #000; }
.walkie-actions { margin-top: .8rem; display: flex; justify-content: center; }

/* ---------------- settings sheet ---------------- */
.sheet-card {
  border: 1px solid var(--fg-dim); background: var(--bg); width: min(94vw, 420px);
  max-height: 90vh; overflow-y: auto; box-shadow: var(--glow);
}
.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: .7rem .9rem; border-bottom: 1px solid var(--line); color: var(--fg-bright);
}
.sheet-head .btn { min-height: 30px; min-width: 30px; padding: .2rem .5rem; }
.sheet-body { padding: .9rem; display: flex; flex-direction: column; gap: .8rem; }
.set-row { display: flex; justify-content: space-between; align-items: center; gap: .6rem; border-bottom: 1px solid var(--line); padding-bottom: .5rem; }
.set-label { color: var(--fg-dim); }
.set-val { color: var(--fg-bright); text-align: right; word-break: break-word; }
.set-field { display: flex; flex-direction: column; gap: .35rem; }
.set-field label { color: var(--fg-dim); }
.set-inline { display: flex; gap: .4rem; }
.set-inline input {
  flex: 1; min-width: 0; background: transparent; border: 1px solid var(--fg-faint); color: var(--fg);
  padding: .4rem .5rem; font-size: max(16px, var(--fs)); text-shadow: inherit;
}
.set-inline input:focus { outline: none; border-color: var(--fg-dim); }
.set-actions { display: flex; flex-direction: column; gap: .5rem; margin-top: .3rem; }
.set-actions .btn { width: 100%; }

@media (max-width: 760px) {
  .term { grid-template-columns: 1fr; grid-template-areas: "bar" "main"; }
  #btn-menu { display: inline-block; }
  .sidebar {
    position: fixed; z-index: 40; top: 0; bottom: 0; left: 0; width: min(82vw, 320px);
    background: var(--bg); transform: translateX(-102%); transition: transform .18s ease-out;
    padding-top: env(safe-area-inset-top);
  }
  .sidebar.open { transform: none; }
  .scrim.show { display: block; position: fixed; inset: 0; z-index: 35; background: rgba(0,0,0,.6); }
  .output { padding: .6rem .7rem; }
  .msg { grid-template-columns: auto 1fr; }
  .msg .t { grid-column: 1 / -1; margin-bottom: -.25rem; font-size: .85em; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor::after { animation: none; }
  .sidebar { transition: none; }
}