/* Lu portal — mobile-first, dark ground + warm bronze.
   Palette sampled from luAI.jpeg / lu_thinking_96.gif (FlowState p9 #196/#443:
   "warm minimal", "dark theme with subtle surface elevation, not flat"). */

:root {
  --bg:        #0b0b0c;
  --surface:   #141416;
  --surface-2: #1b1b1e;
  --line:      #2a2a2e;
  --line-soft: #212125;
  --text:      #ece7e0;
  --muted:     #9a938a;
  --faint:     #6f6a63;
  --accent:    #d2ba94;
  --accent-dp: #876f54;
  --warn:      #c88a5a;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;

  --tap: 46px;

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

/* 100% resolves against the LAYOUT viewport, which does not shrink when the
   software keyboard opens — the bottom-pinned composer would end up under
   it. 100dvh tracks the dynamic viewport; 100% stays as the fallback for
   browsers that lack dvh. Paired with interactive-widget=resizes-content
   in the viewport meta. */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;               /* never below 16px: iOS zooms smaller inputs */
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
}

body { overflow: hidden; }

.noscript {
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.app { height: 100%; height: 100dvh; }

.view { display: none; height: 100%; height: 100dvh; }
.view.is-on { display: flex; }
/* Last, and !important: a hidden view must never render, whatever else
   matches. Two visible views at once is the failure this prevents. */
.view[hidden] { display: none !important; }

/* ============================== LOGIN =============================== */

.view--login {
  align-items: center;
  justify-content: center;
  padding: calc(24px + var(--safe-t)) calc(20px + var(--safe-r))
           calc(24px + var(--safe-b)) calc(20px + var(--safe-l));
  overflow-y: auto;
}

.login {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login__mark {
  width: 76px;
  height: 76px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  display: block;
  margin: 0 auto 18px;
}

.login__title {
  margin: 0;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.login__sub {
  margin: 6px 0 26px;
  color: var(--muted);
  font-size: 15px;
}

.seg {
  display: flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 20px;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
}

.seg__btn {
  flex: 1;
  min-height: var(--tap);
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.seg__btn.is-on {
  background: var(--surface-2);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line);
}

.lbl {
  display: block;
  margin-bottom: 8px;
  text-align: left;
  font-size: 13px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--faint);
}

.field {
  width: 100%;
  min-height: var(--tap);
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.field:focus {
  outline: none;
  border-color: var(--accent-dp);
  box-shadow: 0 0 0 3px rgba(135, 111, 84, 0.25);
}

.btn {
  font: inherit;
  cursor: pointer;
  border-radius: var(--r-md);
  transition: opacity 120ms ease, background 120ms ease;
}

.btn:disabled { opacity: 0.5; cursor: default; }

.btn--primary {
  width: 100%;
  min-height: var(--tap);
  margin-top: 14px;
  border: 0;
  background: var(--accent);
  color: #17130e;
  font-weight: 600;
  font-size: 16px;
}

.btn--primary:active:not(:disabled) { background: var(--accent-dp); }

.msg {
  min-height: 20px;
  margin: 16px 0 0;
  font-size: 14.5px;
  color: var(--warn);
}

.msg:empty { margin-top: 0; }

.fine {
  margin: 22px 0 0;
  font-size: 13px;
  color: var(--faint);
}

/* =============================== CHAT =============================== */

.view--chat { flex-direction: column; }

.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: calc(10px + var(--safe-t)) calc(14px + var(--safe-r)) 10px
           calc(14px + var(--safe-l));
  background: var(--surface);
  border-bottom: 1px solid var(--line-soft);
}

.bar__mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  border: 1px solid var(--line);
}

.bar__id { flex: 1 1 auto; min-width: 0; line-height: 1.25; }
.bar__name { display: block; font-weight: 600; font-size: 16px; }

.bar__who {
  display: block;
  font-size: 12px;
  color: var(--faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn--ghost {
  min-height: var(--tap);
  padding: 0 14px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.btn--ghost:active { background: var(--surface-2); }

.banner {
  flex: 0 0 auto;
  padding: 10px 16px;
  background: #241c14;
  border-bottom: 1px solid #3a2c1e;
  color: var(--warn);
  font-size: 14px;
}

.thread {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  padding: 18px calc(14px + var(--safe-r)) 8px calc(14px + var(--safe-l));
}

.empty { max-width: 560px; margin: 8vh auto 0; text-align: center; }
.empty__lead { margin: 0 0 10px; font-size: 18px; color: var(--text); }
.empty__note { margin: 0; font-size: 14.5px; color: var(--faint); line-height: 1.6; }

.turn { max-width: 720px; margin: 0 auto 18px; }

.turn__who {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
}

.bubble {
  padding: 12px 15px;
  border-radius: var(--r-md);
  font-size: 16px;
  overflow-wrap: anywhere;
}

.bubble p { margin: 0 0 10px; }
.bubble p:last-child { margin-bottom: 0; }

.turn--you .bubble {
  background: var(--surface-2);
  border: 1px solid var(--line);
}

.turn--lu .bubble {
  background: transparent;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--accent-dp);
}

/* Refusal is a FIRST-CLASS ANSWER, not an error. Distinct, never alarming. */
.turn--refusal .bubble {
  background: rgba(210, 186, 148, 0.045);
  border: 1px dashed rgba(210, 186, 148, 0.34);
  border-left: 3px solid var(--accent);
  color: #ddd5c9;
}

.tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(210, 186, 148, 0.12);
  color: var(--accent);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Trouble = an actual fault (network, server). Visually separate from refusal. */
.turn--trouble .bubble {
  background: #1d1614;
  border: 1px solid #3a2620;
  color: #d9b3a4;
}

.sources {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--faint);
}

/* Thinking indicator — must survive minute-scale waits (Caddy allows 90s). */
.thinking { display: flex; align-items: center; gap: 12px; }

.thinking__gif {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 10px;
}

.thinking__txt { font-size: 15px; color: var(--muted); }
.thinking__clock { color: var(--faint); font-variant-numeric: tabular-nums; }

@keyframes lu-pulse {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1; }
}

/* Static stand-in for the animated GIF; only shown under reduced motion. */
.thinking__dot {
  display: none;
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--accent);
  animation: lu-pulse 1.25s ease-in-out infinite;
}

/* ============================= COMPOSER ============================= */

.composer {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex: 0 0 auto;
  padding: 10px calc(12px + var(--safe-r)) calc(10px + var(--safe-b))
           calc(12px + var(--safe-l));
  background: var(--surface);
  border-top: 1px solid var(--line-soft);
}

.composer__input {
  flex: 1 1 auto;
  min-height: var(--tap);
  max-height: 34vh;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text);
  font: inherit;
  font-size: 16px;
  line-height: 1.45;
  resize: none;
  overflow-y: auto;
}

.composer__input:focus {
  outline: none;
  border-color: var(--accent-dp);
}

.composer__input::placeholder { color: var(--faint); }

.btn--send {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: var(--tap);
  height: var(--tap);
  border: 0;
  border-radius: var(--r-md);
  background: var(--accent);
  color: #17130e;
}

.btn--send:active:not(:disabled) { background: var(--accent-dp); }

/* ============================ RESPONSIVE ============================ */

@media (min-width: 700px) {
  .thread { padding-left: 24px; padding-right: 24px; }
  .composer { padding-left: 24px; padding-right: 24px; }
  .bar { padding-left: 24px; padding-right: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  /* The GIF keeps looping regardless of CSS, so swap it for the dot. */
  .thinking__gif { display: none; }
  .thinking__dot { display: block; opacity: 0.85; }
}

/* OP-CODE-EXEC Phase 6: code-writing surface */
.code-input{display:block;width:100%;box-sizing:border-box;margin:0 0 6px;padding:8px 10px;border:1px solid rgba(127,127,127,.35);border-radius:8px;font:12px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;resize:vertical;background:rgba(127,127,127,.06)}
pre.code{margin:8px 0;padding:10px 12px;background:#0d1117;color:#e6edf3;border-radius:8px;overflow:auto;font:12.5px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace}
pre.code code{white-space:pre}
pre.code--out{background:#12241a;color:#c7f5d9}
.code__out-label{margin:8px 0 2px;font-weight:600;opacity:.85}
.code__dl{margin-top:8px}