/* ------------------------------------------------------------------
   Tokens
------------------------------------------------------------------ */
:root {
  --bg:           #f7f4ee;
  --surface:      #ffffff;
  --surface-2:    #fdfaf4;
  --ink:          #14130f;
  --ink-soft:     #3a352c;
  --muted:        #6b6359;
  --muted-2:      #948c80;
  --line:         #e6e0d4;
  --line-strong:  #d6cdbb;
  --accent:       #c75028;
  --accent-soft:  #f7e4d8;
  --accent-ink:   #ffffff;
  --user-bg:      #14130f;
  --user-ink:     #f7f4ee;

  --radius-sm:  10px;
  --radius:     14px;
  --radius-lg:  20px;

  --shadow-sm:  0 1px 0 rgba(20, 19, 15, 0.04);
  --shadow:     0 1px 2px rgba(20, 19, 15, 0.04), 0 8px 24px -16px rgba(20, 19, 15, 0.10);
  --shadow-lg:  0 1px 2px rgba(20, 19, 15, 0.05), 0 24px 48px -28px rgba(20, 19, 15, 0.18);

  --ease:       cubic-bezier(0.2, 0.7, 0.2, 1);

  --content-max: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:           #0f0e0b;
    --surface:      #181714;
    --surface-2:    #1d1c18;
    --ink:          #f3efe7;
    --ink-soft:     #d8d2c5;
    --muted:        #9c958a;
    --muted-2:      #6f6a60;
    --line:         #2a2723;
    --line-strong:  #3b3731;
    --accent:       #e26943;
    --accent-soft:  #2c1c14;
    --accent-ink:   #14130f;
    --user-bg:      #f3efe7;
    --user-ink:     #14130f;

    --shadow-sm:  0 1px 0 rgba(0, 0, 0, 0.4);
    --shadow:     0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -16px rgba(0, 0, 0, 0.6);
    --shadow-lg:  0 1px 2px rgba(0, 0, 0, 0.35), 0 24px 48px -24px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Geist', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

img { image-rendering: pixelated; }
[hidden] { display: none !important; }

::selection { background: var(--accent-soft); color: var(--accent); }

/* ------------------------------------------------------------------
   Reusable primitives
------------------------------------------------------------------ */
.overline {
  display: inline-block;
  font-family: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

.btn {
  --btn-bg:   var(--ink);
  --btn-ink:  var(--bg);
  --btn-line: transparent;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--btn-ink);
  background: var(--btn-bg);
  border: 1px solid var(--btn-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transition:
    transform 140ms var(--ease),
    background 180ms var(--ease),
    box-shadow 180ms var(--ease),
    color 180ms var(--ease);
}
.btn:hover  { transform: translateY(-1px); box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08); }
.btn:active { transform: translateY(0) scale(0.985); transition-duration: 80ms; }
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}
.btn:disabled {
  opacity: 0.55;
  cursor: progress;
  transform: none !important;
  box-shadow: var(--shadow-sm);
}

.btn--primary {
  --btn-bg:  var(--accent);
  --btn-ink: var(--accent-ink);
}
.btn--primary:hover { --btn-bg: color-mix(in oklab, var(--accent) 92%, black 8%); }

.btn__hint {
  display: inline-flex;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0;
  align-items: center;
  justify-content: center;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.14);
  color: inherit;
  opacity: 0.85;
}

/* ------------------------------------------------------------------
   Topbar
------------------------------------------------------------------ */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklab, var(--surface) 80%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.01em;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.topbar .back:hover {
  color: var(--ink);
  border-color: var(--line);
  background: var(--surface);
}
.topbar .back__arrow { transition: transform 160ms var(--ease); }
.topbar .back:hover .back__arrow { transform: translateX(-2px); }

.topbar__title {
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 400;
  font-style: italic;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.topbar__spacer { flex: 1; }

/* ------------------------------------------------------------------
   Password / login screen — editorial split
------------------------------------------------------------------ */
.pw-screen {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(40px, 8vh, 96px) clamp(24px, 6vw, 72px);
}

.pw-screen__editorial {
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-width: 56ch;
}
.pw-screen__title {
  margin: 6px 0 0;
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 400;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.022em;
  color: var(--ink);
}
.pw-screen__title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 300;
}
.pw-screen__lead {
  margin: 0;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.55;
}
.pw-screen__mark {
  margin-top: 18px;
  width: 48px; height: 48px;
  opacity: 0.85;
}

.pw-screen__panel {
  display: flex;
  justify-content: flex-start;
}
.pw-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
@media (prefers-color-scheme: dark) {
  .pw-card { box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.04); }
}
.pw-card__overline { display: block; }
.pw-card__title {
  margin: 6px 0 22px;
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.pw-card__form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.pw-card__hint {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

/* Field */
.field { display: flex; flex-direction: column; gap: 6px; }
.field__label {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.005em;
}
.field input {
  width: 100%;
  padding: 11px 14px;
  font: inherit;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease), background 160ms var(--ease);
}
.field input::placeholder { color: var(--muted-2); letter-spacing: 0.04em; }
.field input:hover  { border-color: var(--line-strong); }
.field input:focus  {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.error {
  color: var(--accent);
  min-height: 1.4em;
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.4;
}
.error:empty { min-height: 0; margin: 0; }

/* ------------------------------------------------------------------
   Chat screen
------------------------------------------------------------------ */
.chat-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px 20px 24px;
  gap: 14px;
}

.status {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 10px;
  font-size: 12.5px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  letter-spacing: 0.01em;
}
.status__dot {
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--muted-2);
  box-shadow: 0 0 0 0 currentColor;
  flex: 0 0 7px;
}
.status.is-loading {
  color: var(--ink-soft);
  border-color: var(--line-strong);
}
.status.is-loading .status__dot {
  background: var(--accent);
  animation: statusPulse 1.6s var(--ease) infinite;
}
.status.is-ready { color: var(--ink-soft); }
.status.is-ready .status__dot { background: #2f9e6c; }
.status.is-error { color: var(--accent); border-color: var(--accent); }
.status.is-error .status__dot { background: var(--accent); }
@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.45; transform: scale(0.85); }
}
@media (prefers-reduced-motion: reduce) {
  .status.is-loading .status__dot { animation: none; }
}

.model-row {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 10px;
  padding: 4px 12px 4px 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.01em;
}
.model-row__label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-2);
}
.model-select {
  font: inherit;
  font-size: 12.5px;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: none;
  cursor: pointer;
  padding: 4px 4px 4px 0;
}
.model-select:focus { color: var(--accent); }
.model-row__keybtn {
  font: inherit;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-2);
  background: transparent;
  border: 0;
  border-left: 1px solid var(--line);
  padding: 2px 0 2px 10px;
  margin-left: 2px;
  cursor: pointer;
}
.model-row__keybtn:hover { color: var(--accent); }

/* Messages stream */
.messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 6px 2px 12px;
  min-height: 240px;
  scroll-behavior: smooth;
}

.msg { max-width: 92%; display: flex; gap: 12px; animation: msgIn 320ms var(--ease) both; }
@keyframes msgIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .msg { animation: none; }
}

.msg-user {
  align-self: flex-end;
  background: var(--user-bg);
  color: var(--user-ink);
  padding: 11px 15px;
  border-radius: 16px 16px 4px 16px;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-shadow: var(--shadow);
  max-width: min(92%, 56ch);
}

.msg-assistant {
  align-self: flex-start;
  align-items: flex-start;
  max-width: min(92%, 64ch);
}
.msg-assistant .avatar {
  width: 32px; height: 32px;
  flex: 0 0 32px;
  border-radius: 8px;
  background-color: var(--accent-soft);
  background-image: url('fox-anim.png');
  background-repeat: no-repeat;
  background-size: 128px 32px;
  background-position: 0 0;
  image-rendering: pixelated;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  animation: foxwalk 6s steps(4) infinite;
}
.msg-assistant.thinking .avatar { animation-duration: 1.6s; }
@keyframes foxwalk {
  from { background-position: 0 0; }
  to   { background-position: -128px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .msg-assistant .avatar { animation: none; }
}

.msg-assistant .body {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px 16px 16px 4px;
  padding: 12px 16px;
  flex: 1;
  box-shadow: var(--shadow);
}
.msg-assistant .text {
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--ink);
}

.citations {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
.citations:empty { display: none; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 140ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.chip:hover  { border-color: var(--accent); transform: translateY(-1px); }
.chip:active { transform: translateY(0) scale(0.98); transition-duration: 80ms; }

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 4px 12px;
  margin: auto 0;
}
.empty-state__title {
  margin: 4px 0 6px;
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 400;
  font-style: italic;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.018em;
  color: var(--ink);
}
.empty-state__suggestions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
.suggestion {
  font: inherit;
  text-align: left;
  padding: 12px 16px;
  background: var(--surface);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
  transition: transform 140ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}
.suggestion::after {
  content: "\2192";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  color: var(--muted-2);
  opacity: 0;
  transition: opacity 160ms var(--ease), transform 200ms var(--ease), color 160ms var(--ease);
}
.suggestion:hover {
  border-color: var(--line-strong);
  color: var(--ink);
  background: var(--surface-2);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.suggestion:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
  color: var(--accent);
}
.suggestion:active { transform: translateY(0) scale(0.99); transition-duration: 80ms; }

/* Composer */
.composer {
  display: flex;
  gap: 10px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.composer:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}
.composer input {
  flex: 1;
  padding: 10px 4px 10px 6px;
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: none;
}
.composer input::placeholder { color: var(--muted-2); }
.composer__send { padding: 10px 16px; }

/* ------------------------------------------------------------------
   Mobile
------------------------------------------------------------------ */
@media (max-width: 880px) {
  .pw-screen {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 20px 48px;
  }
  .pw-screen__panel { justify-content: stretch; }
  .pw-card { max-width: 100%; }
}

@media (max-width: 520px) {
  .topbar { padding: 12px 16px; }
  .topbar__title { font-size: 15px; }
  .chat-screen { padding: 14px 14px 18px; }
  .msg { max-width: 100%; }
  .msg-user { max-width: 100%; }
  .pw-screen__title { font-size: clamp(36px, 11vw, 56px); }
  .pw-screen__lead { font-size: 16px; }
  .composer { padding: 10px; gap: 8px; }
}