:root {
  --bg: #0b0b12;
  --surface: #14141f;
  --surface-2: #1c1c2b;
  --border: #262637;
  --text: #ecebf5;
  --muted: #8f8fa8;
  --accent: #6d5bf0;
  --accent-soft: #2a2450;
  --danger: #f4676b;
  --ok: #3ddc97;
  --radius: 18px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overscroll-behavior-y: none;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* `dvh` keeps the composer above the mobile keyboard as the viewport shrinks. */
.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 820px;
  margin: 0 auto;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(var(--safe-t) + 10px) 14px 10px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.identity { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.identity h1 { font-size: 17px; font-weight: 650; margin: 0; letter-spacing: -0.01em; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  padding: 0;
  cursor: pointer;
}

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--muted);
  flex: none;
}
.status[data-state="open"]   .dot { background: var(--ok); }
.status[data-state="connecting"] .dot { background: #e8b64c; animation: pulse 1.2s ease-in-out infinite; }
.status[data-state="closed"] .dot { background: var(--danger); }
@keyframes pulse { 50% { opacity: 0.25; } }

.actions { display: flex; gap: 4px; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- transcript ---------- */
.transcript {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 18px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* A growing spacer anchors a short conversation to the bottom of the screen,
   the way a chat app should, without the top-clipping that `justify-content:
   flex-end` causes once the transcript overflows. */
.transcript.has-messages::before {
  content: '';
  margin-top: auto;
}

.empty {
  margin: auto;
  text-align: center;
  color: var(--muted);
  padding: 24px;
}
.empty-icon img { width: 56px; height: 56px; border-radius: 15px; opacity: 0.9; }
.empty-title { color: var(--text); font-size: 17px; font-weight: 600; margin: 14px 0 4px; }
.empty-sub { margin: 0; font-size: 13px; }

.row { display: flex; flex-direction: column; max-width: 88%; }
.row.user { align-self: flex-end; align-items: flex-end; }
.row.assistant, .row.system { align-self: flex-start; align-items: flex-start; }
.row.system { max-width: 100%; align-self: center; }

.bubble {
  padding: 10px 14px;
  border-radius: var(--radius);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  animation: rise 0.18s ease-out;
}
@keyframes rise { from { opacity: 0; transform: translateY(4px); } }

.row.user .bubble {
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 6px;
}
.row.assistant .bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 6px;
}
.row.user.pending .bubble { opacity: 0.62; }
.row.user.failed .bubble { background: transparent; border: 1px solid var(--danger); color: var(--danger); }

.meta {
  font-size: 11px;
  color: var(--muted);
  padding: 3px 6px 0;
  display: flex;
  gap: 8px;
  align-items: center;
}
.retry {
  border: 0; background: none; padding: 0;
  color: var(--danger); font: inherit; font-size: 11px;
  text-decoration: underline; cursor: pointer;
}

.row.system .bubble {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  color: #ffc9cb;
  font-size: 13px;
  border-radius: 12px;
}

/* thinking indicator */
.thinking { display: flex; gap: 4px; padding: 14px; }
.thinking i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--muted);
  animation: blink 1.3s infinite ease-in-out;
}
.thinking i:nth-child(2) { animation-delay: 0.18s; }
.thinking i:nth-child(3) { animation-delay: 0.36s; }
@keyframes blink { 0%, 60%, 100% { opacity: 0.25; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-2px); } }

/* ---------- banner ---------- */
.banner {
  margin: 0 14px 8px;
  padding: 9px 12px;
  border-radius: 12px;
  font-size: 13px;
  background: color-mix(in srgb, #e8b64c 14%, transparent);
  border: 1px solid color-mix(in srgb, #e8b64c 32%, transparent);
  color: #f2d69a;
}

/* ---------- composer ---------- */
.composer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 14px calc(10px + var(--safe-b));
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.composer textarea {
  flex: 1;
  resize: none;
  max-height: 40dvh;
  padding: 11px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  /* 16px avoids iOS Safari zooming the page on focus */
  font-size: 16px;
  line-height: 1.45;
  outline: none;
  transition: border-color 0.15s;
}
.composer textarea:focus { border-color: var(--accent); }

.send {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  flex: none;
  border: 0;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.send:active { transform: scale(0.94); }
.send:disabled { opacity: 0.35; cursor: default; }
.send svg { width: 19px; height: 19px; fill: currentColor; stroke: none; }

/* ---------- settings sheet ---------- */
.sheet {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  width: min(520px, 100%);
  margin: auto auto 0;
}
.sheet::backdrop { background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(2px); }

.sheet-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px 20px 0 0;
  padding: 18px 18px calc(18px + var(--safe-b));
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideup 0.2s ease-out;
}
@keyframes slideup { from { transform: translateY(16px); opacity: 0; } }

@media (min-width: 560px) {
  .sheet { margin: auto; }
  .sheet-inner { border-radius: 20px; }
}

.sheet-head { display: flex; align-items: center; justify-content: space-between; }
.sheet-head h2 { margin: 0; font-size: 17px; font-weight: 650; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 13px; font-weight: 550; }
.field input {
  padding: 11px 13px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-size: 16px;
  outline: none;
}
.field input:focus { border-color: var(--accent); }
.field small { color: var(--muted); font-size: 12px; line-height: 1.4; }

.sheet-meta {
  display: grid;
  gap: 6px;
  padding: 12px;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: 12px;
}
.sheet-meta div { display: flex; justify-content: space-between; gap: 12px; }
.sheet-meta span { color: var(--muted); }
.sheet-meta code { font-size: 11px; overflow-wrap: anywhere; text-align: right; }

.sheet-actions { display: flex; gap: 8px; }
.btn {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 550;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn.ghost.danger { color: var(--danger); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- progress + approvals ---------- */
.progress-note {
  font-size: 12px;
  color: var(--muted);
  padding: 2px 6px 0;
  animation: rise 0.18s ease-out;
}

.row.approval { align-self: stretch; max-width: 100%; }

.approval-card {
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border-radius: 16px;
  padding: 13px 15px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  animation: rise 0.18s ease-out;
}
.approval-card.answered, .approval-card.expired {
  border-color: var(--border);
  background: var(--surface);
}

.approval-label {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}
.approval-card.answered .approval-label,
.approval-card.expired .approval-label { color: var(--muted); }

.approval-text { white-space: pre-wrap; overflow-wrap: anywhere; }

.approval-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.approval-btn {
  flex: 1 1 auto;
  min-width: 110px;
  padding: 10px 14px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s;
}
.approval-btn:active { transform: scale(0.97); }
.approval-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.approval-outcome { font-size: 13px; color: var(--muted); }