:root {
  --ink: #e7efe9;
  --muted: #96a49d;
  --faint: #5f6e66;
  --surface: #0f1512;
  --surface-alt: #151d18;
  --line: #27322c;
  --base: #090d0b;
  --good: #7cc7a4;
  --signal: #ceb27a;
  --bad: #d88d78;
  --radius-lg: 16px;
  --radius: 10px;
  --sans: "Bahnschrift", "Aptos Narrow", "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --mono: "Cascadia Mono", Consolas, monospace;
  --shadow: 0 24px 56px rgba(0, 0, 0, .22);
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(120, 182, 160, .16), transparent 40%),
    radial-gradient(circle at 90% 0%, rgba(201, 168, 95, .16), transparent 35%),
    var(--base);
  font-family: var(--sans);
}

button, input, textarea { font: inherit; }
button { color: inherit; border: 0; border-radius: var(--radius); }
p { margin: 0; }

.assistant-shell,
.chat-view { min-height: 100vh; }

.auth-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 36px 20px;
}

.auth-card {
  width: min(100%, 440px);
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(15, 21, 18, .92);
  box-shadow: var(--shadow);
}

.brand-block,
.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--base);
  background: linear-gradient(145deg, var(--good), #7aa7bd);
  font: 700 24px/1 var(--serif);
  box-shadow: 0 0 0 4px rgba(124, 199, 164, .12);
}

h1 {
  margin: 0;
  font: 500 42px/1.05 var(--serif);
}

.brand-kicker {
  margin: 0 0 4px;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: 11px;
  font-family: var(--mono);
}

.auth-copy {
  margin: 18px 0 22px;
  color: var(--muted);
  line-height: 1.45;
}

label {
  display: block;
  margin: 0 0 6px;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: .03em;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: #080e0c;
}

input { height: 46px; padding: 0 14px; }
input:focus,
textarea:focus,
.primary-button:focus,
.ghost-button:focus,
.nav-tab:focus-visible,
button:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

textarea {
  min-height: 96px;
  max-height: 220px;
  padding: 14px;
  line-height: 1.45;
  resize: vertical;
}

.input-with-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.icon-button,
.ghost-button,
.primary-button {
  height: 44px;
  border-radius: var(--radius);
}

.icon-button,
.ghost-button {
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--line);
  color: var(--muted);
}

.primary-button {
  background: var(--signal);
  color: #111810;
  font-weight: 700;
}

#login-button,
.primary-button { width: 100%; }

#login-button,
#send { margin-top: 14px; }

.login-form,
.composer {
  display: grid;
  gap: 12px;
}

#login-error {
  min-height: 20px;
  color: var(--bad);
}

.chat-view {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: 14px 16px 24px;
  display: grid;
  gap: 12px;
}

.assistant-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px;
}

.assistant-header h1 {
  font-size: clamp(30px, 4.4vw, 38px);
  letter-spacing: -.02em;
}

.session-state {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: #0f1512;
  font-size: 12px;
}

.human-nav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px;
  width: fit-content;
  background: #0c1210;
}

.nav-tab {
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.nav-tab.active,
.nav-tab:hover {
  background: var(--signal);
  color: #11150f;
}

.surface-panel {
  display: grid;
  align-content: start;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(21, 29, 24, .86), rgba(15, 21, 18, .95));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.surface-panel.active-panel {
  display: grid;
}

.panel-toolbar {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: #0c1210;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.panel-toolbar h2 {
  margin: 0;
  font: 500 26px/1.12 var(--serif);
}

.panel-toolbar p {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.45;
}

.focus-chip {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--good);
  padding: 6px 10px;
  border: 1px solid rgba(124, 199, 164, .45);
  border-radius: 999px;
  background: rgba(124, 199, 164, .12);
}

.messages {
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: auto;
  min-height: calc(100vh - 280px);
  max-height: calc(100vh - 280px);
}

.message {
  width: min(92%, 760px);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  line-height: 1.45;
  white-space: pre-wrap;
  background: #0f1512;
}

.message.assistant { align-self: flex-start; background: #121a16; }
.message.user { align-self: flex-end; background: #19231c; border-color: rgba(120, 191, 162, .4); }

.message-author { color: var(--faint); font-size: 11px; margin-bottom: 6px; font-weight: 700; }
.message.user .message-author { color: #b6ddb8; }
.message-time { margin-top: 8px; font-size: 11px; color: var(--faint); font-family: var(--mono); }
.message small { display: block; margin-top: 6px; color: var(--faint); }

.composer {
  position: sticky;
  bottom: 0;
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
  background: linear-gradient(transparent, rgba(11, 16, 14, .88));
  grid-template-columns: minmax(0, 1fr) auto;
}

.composer-actions { display: grid; align-items: end; }

.composer button:disabled {
  cursor: wait;
  opacity: .7;
}

.surface-panel:not(.active-panel) { display: none; }

.attention-surface,
.history-surface { padding: 0 0 12px; }

.attention-list,
.history-list {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.attention-card,
.history-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0b110f;
  padding: 14px;
}

.attention-card h3,
.history-item strong { margin: 0 0 8px; font: 600 15px/1.2 var(--serif); }

.attention-card time,
.history-item time,
.attention-card .muted,
.history-item .muted {
  color: var(--muted);
  font-size: 12px;
  font-family: var(--mono);
}

.attention-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

.attention-actions .ghost-button,
.action-row button {
  height: 34px;
  padding: 0 11px;
  background: rgba(255, 255, 255, .06);
  color: var(--ink);
}

.attention-actions .ghost-button {
  border: 1px solid rgba(194, 168, 118, .48);
  color: #f2e8d0;
}

.attention-actions .ghost-button.primary { border-color: transparent; background: var(--good); color: #11211b; }

.history-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.history-item p {
  margin: 0 0 8px;
  color: var(--ink);
  white-space: pre-wrap;
}

.history-item .history-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.history-item .message-kind {
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--signal);
}

.status-bar {
  margin: 8px auto 0;
  max-width: 980px;
  color: var(--faint);
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(15, 21, 18, .8);
  min-height: 18px;
  visibility: hidden;
}

.status-bar.visible { visibility: visible; }

.composer-error {
  position: fixed;
  right: 16px;
  bottom: 16px;
  max-width: min(420px, calc(100vw - 32px));
  border-radius: 12px;
  border: 1px solid rgba(216, 141, 120, .36);
  background: #241715;
  color: #ffd8ca;
  padding: 10px 12px;
  transform: translateY(16px);
  opacity: 0;
  transition: .2s ease;
}

.composer-error.show {
  transform: translateY(0);
  opacity: 1;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.empty-state {
  color: var(--muted);
  padding: 18px;
}

.empty-state.error { color: var(--bad); }

@media (max-width: 720px) {
  .chat-view {
    padding: 10px 10px 18px;
    gap: 10px;
  }

  .assistant-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .session-state { width: 100%; justify-content: space-between; }

  .messages {
    min-height: calc(100vh - 320px);
    max-height: calc(100vh - 320px);
  }

  .composer {
    grid-template-columns: 1fr;
  }

  .panel-toolbar {
    flex-direction: column;
  }

  .attention-list,
  .history-list {
    padding: 12px;
  }
}