/* ── NAGARCOT agent — presentation design system ──
   Tokens sourced from ~/Documents/NAGARCOT PRESENTATION/tokens.css
   Burgundy #7A1F2B on warm cream #F2EFE9. Museum restraint:
   hairlines, no shadows, nothing blinks or jumps. Text ≥16px. */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Presentation tokens */
  --clr-burgundy-700: #7A1F2B;
  --clr-burgundy-900: #5E1822;
  --clr-burgundy-400: #A65C63;
  --clr-burgundy-200: #CBA9AC;
  --clr-cream-50:  #F2EFE9;
  --clr-ink-900:   #141414;
  --clr-stone-500: #6E675C;
  --clr-stone-300: #A79F92;
  --clr-line-200:  #D9D3C8;
  --clr-line-100:  #EAE6DD;
  --clr-state-warm:  #A85C4B;
  --clr-state-amber: #B48A45;
  --clr-state-green: #566B4D;
  --ease-out-expo: cubic-bezier(.16, 1, .3, 1);

  --bg: var(--clr-cream-50);
  --surface: #FAF8F3;
  --text: var(--clr-ink-900);
  --text-muted: var(--clr-stone-500);
  --border: var(--clr-line-200);

  /* Field colours — drawn from the presentation state palette */
  --c-вопросы: var(--clr-burgundy-700);
  --c-вопросы-bg: #EFE7E4;
  --c-вопросы-soft: var(--clr-burgundy-200);

  --c-цели: var(--clr-state-amber);
  --c-цели-bg: #F0EADC;
  --c-цели-soft: #D8C69E;

  --c-база: var(--clr-state-green);
  --c-база-bg: #E7EAE1;
  --c-база-soft: #B3BFA8;

  --accent: var(--c-вопросы);
  --accent-bg: var(--c-вопросы-bg);
  --accent-soft: var(--c-вопросы-soft);

  --font-body: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Archivo', var(--font-body);
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --drop-zone-h: 88px;
  --header-h: 56px;

  --radius: 4px;
  --radius-sm: 3px;
  --transition: 0.4s var(--ease-out-expo);
}

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 840px;
  margin: 0 auto;
  width: 100%;
  position: relative;
}

/* ── Header ── */
#header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}

.field-tabs {
  display: flex;
  gap: 2px;
}

/* Tabs are INDICATORS driven by the agent, not buttons */
.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-stone-300);
  transition: color var(--transition), border-color var(--transition);
  user-select: none;
  cursor: default;
}

.tab-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-line-200);
  transition: background 0.4s var(--ease-out-expo);
}

.tab.active {
  color: var(--accent);
  border-color: var(--accent-soft);
}

.tab.active .tab-dot {
  background: var(--accent);
}

#return-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--clr-stone-300);
  text-decoration: none;
  border: none;
  background: none;
  margin-right: 8px;
  transition: color 0.2s;
}
#return-link:hover { color: var(--text); }

#settings-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 17px;
  color: var(--clr-stone-300);
  padding: 6px;
  transition: color 0.2s;
}
#settings-btn:hover { color: var(--text); }

/* ── Field description ── */
.field-description {
  padding: 10px 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--clr-line-100);
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--text-muted);
  flex-shrink: 0;
  min-height: 42px;
}

/* ── Dialog area ── */
#dialog-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 24px 8px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-behavior: smooth;
}

#messages::-webkit-scrollbar { width: 3px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: var(--border); }

/* ── Message bubbles ── */
.message {
  max-width: 85%;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 17px;
  line-height: 1.6;
  animation: msgIn 0.35s var(--ease-out-expo);
  white-space: pre-wrap;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.message.user {
  align-self: flex-end;
  background: var(--clr-line-100);
  color: var(--text);
}

/* Voice of the system: hairline burgundy edge on the left —
   the same component as Triangulation / SPR Demo on the site */
.message.agent {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--clr-line-100);
  border-left: 2px solid var(--accent);
}

.message.agent.field-вопросы { border-left-color: var(--c-вопросы); }
.message.agent.field-цели    { border-left-color: var(--c-цели); }
.message.agent.field-база    { border-left-color: var(--c-база); }

.message.error {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--clr-burgundy-200);
  border-left: 2px solid var(--clr-state-warm);
  color: var(--clr-state-warm);
  font-size: 16px;
}

/* Typing indicator — calm opacity fade, nothing bounces */
.typing-dots {
  display: flex;
  gap: 5px;
  padding: 4px 0;
}
.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-stone-300);
  animation: dot-fade 1.4s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.25s; }
.typing-dots span:nth-child(3) { animation-delay: 0.5s; }

@keyframes dot-fade {
  0%, 100% { opacity: 0.25; }
  50%      { opacity: 0.9; }
}

/* ── Bifurcation card (развилка) — status plaque: hairline frame + tick ── */
.bifurcation {
  margin: 0 24px 8px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--c-цели-soft);
  border-left: 2px solid var(--c-цели);
  border-radius: var(--radius);
  animation: msgIn 0.4s var(--ease-out-expo);
}

.bifurcation.hidden { display: none; }

.bifurcation-text {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.bif-btn {
  padding: 8px 16px;
  border-radius: 2px;
  border: 1px solid var(--c-цели-soft);
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  color: var(--text);
  transition: background 0.2s, border-color 0.2s;
}

.bif-btn:hover { border-color: var(--c-цели); }
.bif-btn.primary {
  background: var(--c-цели);
  color: var(--clr-cream-50);
  border-color: var(--c-цели);
}
.bif-btn.primary:hover { opacity: 0.9; }

/* ── Depth gate — warning warm colour, requires an explicit answer ── */
.depth-gate {
  margin: 0 24px 8px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--clr-state-warm);
  border-left: 3px solid var(--clr-state-warm);
  border-radius: var(--radius);
  animation: msgIn 0.4s var(--ease-out-expo);
}

.depth-gate.hidden { display: none; }

.depth-gate-text {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 14px;
}

.depth-gate-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.gate-btn {
  padding: 9px 20px;
  border-radius: 2px;
  border: 1px solid var(--clr-state-warm);
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  color: var(--clr-state-warm);
  transition: background 0.2s, color 0.2s;
}

.gate-btn.primary {
  background: var(--clr-state-warm);
  color: var(--clr-cream-50);
}
.gate-btn:hover { opacity: 0.9; }

/* ── Input area ── */
#input-area {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 24px 16px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

#user-input {
  flex: 1;
  resize: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 16px;
  font-family: var(--font-body);
  line-height: 1.5;
  background: var(--surface);
  color: var(--text);
  outline: none;
  max-height: 140px;
  overflow-y: auto;
  transition: border-color 0.2s;
}
#user-input:focus { border-color: var(--accent); }
#user-input::placeholder { color: var(--clr-stone-300); }
#user-input:disabled { opacity: 0.5; }

#send-btn {
  width: 42px;
  height: 42px;
  border-radius: 2px;
  border: none;
  background: var(--accent);
  color: var(--clr-cream-50);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), opacity 0.2s;
}
#send-btn:hover { opacity: 0.9; }
#send-btn:disabled { opacity: 0.35; cursor: default; }

/* ── Drop zone: six domain blocks ── */
#drop-zone {
  height: var(--drop-zone-h);
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  padding: 10px 24px 12px;
  flex-shrink: 0;
}

.domain-block {
  border: 1px solid var(--clr-line-200);
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 7px 4px 5px;
  gap: 5px;
  overflow: hidden;
  position: relative;
  transition: border-color 0.6s var(--ease-out-expo), background 0.6s var(--ease-out-expo);
}

.domain-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-stone-300);
  user-select: none;
  white-space: nowrap;
  transition: color 0.6s var(--ease-out-expo);
}

.domain-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
  max-width: 100%;
}

/* Accumulated drop */
.drop-particle {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-burgundy-700);
  opacity: 0.7;
  animation: dropAppear 0.4s var(--ease-out-expo);
}

@keyframes dropAppear {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 0.7; }
}

/* Receiving block: one calm highlight, then settles */
.domain-block.block-pulse {
  animation: blockReceive 1.2s var(--ease-out-expo);
}

.domain-block.block-pulse .domain-label {
  color: var(--clr-burgundy-700);
}

@keyframes blockReceive {
  0%   { border-color: var(--clr-line-200); background: transparent; }
  25%  { border-color: var(--clr-burgundy-700); background: #EFE7E4; }
  100% { border-color: var(--clr-burgundy-400); background: transparent; }
}

/* Block that has received at least one drop keeps a quiet trace */
.domain-block:has(.drop-particle) {
  border-color: var(--clr-burgundy-200);
}
.domain-block:has(.drop-particle) .domain-label {
  color: var(--clr-stone-500);
}

/* ── Animation layer (flying drops) ── */
#animation-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
}

.flying-drop {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--clr-burgundy-700);
  opacity: 0.8;
  pointer-events: none;
}

/* ── Settings panel ── */
#settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 20, 0.25);
  z-index: 200;
}

#settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 340px;
  max-width: 90vw;
  height: 100%;
  background: var(--bg);
  border-left: 1px solid var(--border);
  z-index: 201;
  display: flex;
  flex-direction: column;
}

#settings-overlay.hidden, #settings-panel.hidden { display: none; }

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
}

.settings-header h2 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

#settings-close {
  background: none;
  border: none;
  font-size: 17px;
  cursor: pointer;
  color: var(--clr-stone-300);
  padding: 4px;
}

.settings-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.setting-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.mode-switch {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.2s;
  gap: 2px;
  font-family: var(--font-body);
}

.mode-btn.active {
  border-color: var(--clr-burgundy-700);
  background: var(--surface);
}

.mode-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.mode-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.local-auth-hint {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
}
.local-auth-hint.hidden { display: none; }
.local-auth-hint code {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}
.local-auth-hint button {
  margin-top: 4px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font-body);
  color: var(--clr-burgundy-700);
  transition: border-color 0.2s;
  align-self: flex-start;
}
.local-auth-hint button:hover { border-color: var(--clr-burgundy-700); }

#api-key-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#api-key-input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 14px;
  font-family: var(--font-mono);
  background: var(--surface);
  color: var(--text);
  outline: none;
}
#api-key-input:focus { border-color: var(--clr-burgundy-700); }

#save-key-btn {
  padding: 10px 16px;
  background: var(--clr-burgundy-700);
  color: var(--clr-cream-50);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  font-size: 15px;
  font-family: var(--font-body);
  transition: opacity 0.2s;
}
#save-key-btn:hover { opacity: 0.9; }

.settings-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4px 0;
}

#copy-log-btn {
  padding: 10px 16px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  font-size: 15px;
  font-family: var(--font-body);
  transition: border-color 0.2s;
}
#copy-log-btn:hover { border-color: var(--clr-burgundy-700); }

.setting-note {
  font-size: 13px;
  color: var(--text-muted);
}

.settings-status {
  font-size: 14px;
  color: var(--clr-state-green);
  min-height: 20px;
}

/* ── Field colour switching ── */
body[data-field="вопросы"] {
  --accent: var(--c-вопросы);
  --accent-bg: var(--c-вопросы-bg);
  --accent-soft: var(--c-вопросы-soft);
}
body[data-field="цели"] {
  --accent: var(--c-цели);
  --accent-bg: var(--c-цели-bg);
  --accent-soft: var(--c-цели-soft);
}
body[data-field="база"] {
  --accent: var(--c-база);
  --accent-bg: var(--c-база-bg);
  --accent-soft: var(--c-база-soft);
}

/* ── Entry splash: "How can I help?" in the display register ── */
#entry-splash {
  position: absolute;
  inset: var(--header-h) 0 var(--drop-zone-h) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 40px;
  pointer-events: none;
  z-index: 10;
  opacity: 1;
  transition: opacity 0.5s var(--ease-out-expo);
}

#entry-splash.splash-hiding {
  opacity: 0;
}

.splash-content {
  max-width: 520px;
  text-align: center;
}

.splash-line {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--clr-ink-900);
}

/* ── Toast notifications — status plaque: hairline frame + burgundy tick ── */
#toast-layer {
  position: fixed;
  bottom: calc(var(--drop-zone-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  width: min(520px, calc(100vw - 48px));
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 500;
  pointer-events: none;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px 14px 34px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-muted);
  position: relative;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
}

.toast::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 21px;
  width: 7px;
  height: 7px;
  background: var(--accent);
}

.toast.toast-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Narrow screens: domain blocks fold to 3×2 ── */
@media (max-width: 560px) {
  :root { --drop-zone-h: 128px; }
  #drop-zone {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
  }
  .domain-label { font-size: 9px; }
}