/* ============================================================
   HOMELANDER V3.2 PRO — Vought-corporate command center
   dark: tower-at-night navy + hero red + gold
   light: daylight-parade paper-blue + the same red
   (legacy var names kept: --ember* now carries hero red)
   ============================================================ */

:root {
  --font-display: "Anton", "Arial Narrow", sans-serif;
  --font-body: "Libre Franklin", system-ui, sans-serif;
  --font-prose: "Libre Franklin", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg: #070a11;
  --bg-raised: rgba(20, 28, 45, 0.62);
  --bg-raised-2: rgba(28, 38, 60, 0.78);
  --bg-overlay: #1a2438;
  --bg-input: rgba(11, 17, 29, 0.88);
  --line: #2b3a5a;
  --line-soft: #1c2740;
  --ink: #eef3fc;
  --ink-dim: #a3b1c9;
  --ink-faint: #6c7b96;
  --ember: #e23b40;
  --ember-bright: #ff5d5a;
  --ember-dim: rgba(226, 59, 64, 0.16);
  --ember-glow: rgba(226, 59, 64, 0.5);
  --gold: #e6b53d;
  --gold-bright: #fbe6a8;
  --gold-dim: rgba(230, 181, 61, 0.18);
  --user-bubble: linear-gradient(165deg, #1f2c47, #161f33);
  --danger: #ff7a64;
  --ok: #6fbf73;
  /* unified elevation ramp — soft → small → default → large */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 4px 14px -4px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 22px 56px -16px rgba(0, 0, 0, 0.66), 0 4px 12px -6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 40px 90px -24px rgba(0, 0, 0, 0.72), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
  --scrim: rgba(4, 7, 12, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hi: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] {
  --bg: #e7edf6;
  --bg-raised: rgba(252, 253, 255, 0.74);
  --bg-raised-2: rgba(255, 255, 255, 0.92);
  --bg-overlay: #ffffff;
  --bg-input: #fbfcfe;
  --line: #c0ccdf;
  --line-soft: #dbe2ee;
  --ink: #111a27;
  --ink-dim: #46566c;
  --ink-faint: #6b7a90;
  --ember: #b3252b;
  --ember-bright: #971f24;
  --ember-dim: rgba(179, 37, 43, 0.1);
  --ember-glow: rgba(179, 37, 43, 0.22);
  --gold: #a87f1a;
  --gold-bright: #c79a2c;
  --gold-dim: rgba(168, 127, 26, 0.15);
  --user-bubble: linear-gradient(165deg, #eef3fa, #dde6f2);
  --danger: #c03a30;
  --ok: #3f7a45;
  /* unified elevation ramp — light theme reads softer/cooler */
  --shadow-xs: 0 1px 2px rgba(30, 45, 70, 0.08);
  --shadow-sm: 0 4px 14px -4px rgba(30, 45, 70, 0.12), 0 1px 2px rgba(30, 45, 70, 0.06);
  --shadow: 0 20px 48px -14px rgba(30, 45, 70, 0.2), 0 4px 10px -6px rgba(30, 45, 70, 0.1);
  --shadow-lg: 0 36px 72px -24px rgba(30, 45, 70, 0.26), 0 8px 20px -12px rgba(30, 45, 70, 0.12);
  --scrim: rgba(20, 30, 48, 0.4);
  --glass-border: rgba(20, 35, 60, 0.11);
  --glass-hi: rgba(255, 255, 255, 0.75);
}
[data-theme="dark"] { --bg-raised-solid: #141c2d; }
[data-theme="light"] { --bg-raised-solid: #f8fafd; }

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.55;
  overflow: hidden;
  transition: background 0.4s, color 0.4s;
}

/* atmospheric aurora — layered radial glows + slow drift behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 50% -8%, var(--ember-dim), transparent 60%),
    radial-gradient(45% 40% at 92% 8%, var(--gold-dim), transparent 55%),
    radial-gradient(55% 45% at 5% 18%, rgba(61, 111, 180, 0.14), transparent 60%);
  animation: aurora 26s ease-in-out infinite alternate;
  will-change: transform, opacity;
}
@keyframes aurora {
  0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.85; }
  100% { transform: translate3d(0, 1.6%, 0) scale(1.06); opacity: 1; }
}
/* vignette to focus the centre */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(120% 120% at 50% 40%, transparent 55%, rgba(0, 0, 0, 0.35) 100%);
}
[data-theme="light"] body::after {
  background: radial-gradient(120% 120% at 50% 40%, transparent 60%, rgba(40, 55, 80, 0.08) 100%);
}

/* film grain */
.grain {
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 1.2s steps(4) infinite;
}
@keyframes grain-shift {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-2%, 1%); }
  50% { transform: translate(1%, -2%); }
  75% { transform: translate(-1%, 2%); }
  100% { transform: translate(2%, -1%); }
}

.app {
  display: flex;
  height: 100vh;
  height: 100dvh; /* mobile: exclude the URL bar so the composer stays on-screen */
}

/* ============ SIDEBAR ============ */
.sidebar {
  width: 290px;
  min-width: 290px;
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border-right: 1px solid var(--glass-border);
  box-shadow: inset -1px 0 0 var(--glass-hi), 1px 0 30px rgba(0, 0, 0, 0.25);
  transition: margin-left 0.35s var(--ease-out);
  position: relative;
  z-index: 5;
}
.sidebar.collapsed { margin-left: -290px; }

.sidebar-head {
  padding: 26px 22px 18px;
  position: relative;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 29px;
  margin: 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--ink);
  animation: rise 0.7s var(--ease-out) both;
}
.wordmark .amp {
  color: var(--ember);
  text-shadow: 0 0 16px var(--ember-glow);
  -webkit-text-stroke: 0.4px var(--ember-bright);
}
.wordmark-sub {
  margin: 8px 0 0;
  font-size: 11px;
  font-style: italic;
  color: var(--ink-faint);
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: rise 0.7s 0.08s var(--ease-out) both;
}
.badge {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
  border: 1px solid color-mix(in srgb, var(--gold) 60%, transparent);
  background: linear-gradient(160deg, var(--gold-dim), transparent);
  border-radius: 4px;
  padding: 2px 7px;
  box-shadow: 0 0 12px var(--gold-dim), inset 0 1px 0 var(--glass-hi);
}
.stripes {
  margin-top: 14px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(
    90deg,
    var(--ember) 0 33%,
    var(--ink) 33% 66%,
    #3d6fb4 66% 100%
  );
  opacity: 0.85;
  animation: rise 0.7s 0.16s var(--ease-out) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.btn-new {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 6px 16px 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(160deg, var(--ember-dim), transparent 72%);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13.5px;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: var(--shadow-sm), inset 0 1px 0 var(--glass-hi);
  transition: border-color 0.2s var(--ease-out), box-shadow 0.25s var(--ease-out), transform 0.15s var(--ease-out), background 0.25s;
  animation: rise 0.7s 0.14s var(--ease-out) both;
}
.btn-new:hover {
  border-color: var(--ember);
  background: linear-gradient(160deg, var(--ember-dim), transparent 55%);
  box-shadow: 0 0 0 1px var(--ember-dim), 0 10px 26px -6px var(--ember-glow), inset 0 1px 0 var(--glass-hi);
  transform: translateY(-1px);
}
.btn-new svg { color: var(--ember); filter: drop-shadow(0 0 5px var(--ember-glow)); transition: transform 0.2s var(--ease-out); }
.btn-new:hover svg { transform: rotate(90deg); }

.search-wrap {
  position: relative;
  padding: 0 16px 12px;
  animation: rise 0.7s 0.2s var(--ease-out) both;
}
.search-wrap::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 9px;
  width: 13px;
  height: 13px;
  pointer-events: none;
  opacity: 0.55;
  background: var(--ink-faint);
  -webkit-mask: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='7' cy='7' r='5' fill='none' stroke='black' stroke-width='1.6'/%3E%3Cpath d='M11 11l3.5 3.5' stroke='black' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  mask: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='7' cy='7' r='5' fill='none' stroke='black' stroke-width='1.6'/%3E%3Cpath d='M11 11l3.5 3.5' stroke='black' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
}
.search-wrap input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  background: var(--bg-input);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-wrap input:focus {
  border-color: var(--ember);
  box-shadow: 0 0 0 3px var(--ember-dim);
}
.search-wrap input::placeholder { color: var(--ink-faint); }

.convo-list {
  flex: 1;
  overflow-y: auto;
  padding: 2px 10px 10px;
}
.convo-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  margin: 2px 0;
  border-radius: 9px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.18s var(--ease-out), border-color 0.18s, box-shadow 0.18s;
  animation: rise 0.4s var(--ease-out) both;
}
.convo-item:hover {
  background: var(--bg-overlay);
  border-color: var(--line-soft);
}
.convo-item.active {
  background: linear-gradient(100deg, var(--ember-dim), var(--bg-overlay) 60%);
  border-color: color-mix(in srgb, var(--ember) 30%, var(--line));
  box-shadow: var(--shadow-xs);
}
.convo-item.active::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 16%;
  bottom: 16%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--ember-bright), var(--ember));
  box-shadow: 0 0 10px var(--ember-glow);
}
.convo-item.active .convo-title { color: var(--ink); font-weight: 500; }
.convo-title {
  flex: 1;
  font-size: 13.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.convo-title input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--ember);
  border-radius: 5px;
  color: var(--ink);
  font: inherit;
  padding: 2px 6px;
  outline: none;
}
.convo-actions {
  display: none;
  gap: 2px;
}
.convo-item:hover .convo-actions { display: flex; }
.convo-actions button {
  border: 0;
  background: none;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 3px;
  border-radius: 5px;
  line-height: 0;
}
.convo-actions button:hover { color: var(--ember); background: var(--ember-dim); }
.convo-actions .del:hover { color: var(--danger); background: rgba(217, 106, 95, 0.12); }

.sidebar-foot {
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: linear-gradient(0deg, var(--glass-hi), transparent);
}
.foot-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 11px;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  background: none;
  color: var(--ink-dim);
  font-family: var(--font-body);
  font-size: 12.5px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.foot-btn:hover {
  color: var(--ink);
  border-color: var(--ember);
  background: var(--ember-dim);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}
.foot-btn.small { width: auto; flex: 1; justify-content: center; }
.foot-row { display: flex; gap: 8px; }
.theme-icon {
  display: inline-flex;
  font-size: 13px;
  line-height: 1;
  transition: transform 0.4s var(--ease-out);
}
.foot-btn:hover .theme-icon { transform: rotate(20deg) scale(1.12); }
.theme-icon::before { content: "☾"; }
[data-theme="light"] .theme-icon::before { content: "☀"; }

/* ============ MAIN ============ */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}
.main::before {
  /* candle-glow atmosphere */
  content: "";
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 720px;
  height: 420px;
  background: radial-gradient(ellipse at center, var(--ember-dim), transparent 65%);
  pointer-events: none;
  opacity: 0.8;
}

.chat-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 22px;
  border-bottom: 1px solid var(--glass-border);
  background: linear-gradient(180deg, var(--glass-hi), transparent);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 1px 0 var(--glass-hi), 0 12px 30px -22px rgba(0, 0, 0, 0.75);
  z-index: 2;
}
.chat-title-wrap { flex: 1; min-width: 0; }
.chat-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 19px;
  letter-spacing: 0.025em;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-meta {
  font-size: 11.5px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  margin-top: 2px;
  letter-spacing: 0.01em;
}
.head-actions { display: flex; gap: 6px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: none;
  color: var(--ink-dim);
  cursor: pointer;
  transition: color 0.2s var(--ease-out), border-color 0.2s, background 0.2s, transform 0.15s;
}
.icon-btn:hover {
  color: var(--ember);
  border-color: var(--line);
  background: var(--bg-overlay);
  transform: translateY(-1px);
}

.connect-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 13px;
  border: 1px solid var(--ember);
  border-radius: 9px;
  background: var(--ember-dim);
  color: var(--ember-bright);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
}
.connect-btn:hover {
  background: var(--ember);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px var(--ember-glow);
}
.connect-btn svg { filter: drop-shadow(0 0 4px var(--ember-glow)); }

/* ============ CONNECT MODAL ============ */
.modal-scrim {
  position: fixed;
  inset: 0;
  background: var(--scrim);
  z-index: 60;
  animation: fade 0.2s both;
  backdrop-filter: blur(2px);
}
.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(560px, 94vw);
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-raised);
  backdrop-filter: blur(22px) saturate(1.25);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  z-index: 70;
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--ember-dim), inset 0 1px 0 var(--glass-hi);
  animation: modal-pop 0.3s var(--ease-out) both;
}
@keyframes modal-pop {
  from { opacity: 0; transform: translate(-50%, -46%) scale(0.97); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--glass-hi), transparent);
}
.modal-head h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin: 0;
}
.modal-sub {
  margin: 6px 0 0;
  font-size: 12.5px;
  color: var(--ink-dim);
  line-height: 1.5;
}
.modal-body { padding: 20px 24px 24px; }
.step {
  position: relative;
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
}
.step:not(:last-of-type) .step-n::after {
  content: "";
  position: absolute;
  top: 28px;
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 1.5px;
  background: linear-gradient(180deg, var(--ember-dim), transparent);
}
.step-n {
  position: relative;
  flex-shrink: 0;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--ember-bright), var(--ember));
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 14px var(--ember-glow), inset 0 1px 0 rgba(255, 255, 255, 0.32);
}
.step-body { flex: 1; min-width: 0; }
.step-body > p {
  margin: 3px 0 8px;
  font-size: 13.5px;
  color: var(--ink);
}
.snippet {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-input);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.snippet code {
  flex: 1;
  padding: 11px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gold);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.snip-copy {
  flex-shrink: 0;
  border: 0;
  border-left: 1px solid var(--line);
  background: var(--bg-overlay);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0 14px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.snip-copy:hover { color: var(--ember-bright); background: var(--ember-dim); }
.connect-more {
  margin: 4px 0 6px;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}
.connect-more summary {
  cursor: pointer;
  font-size: 12.5px;
  color: var(--ink-dim);
  list-style: none;
  user-select: none;
}
.connect-more summary::-webkit-details-marker { display: none; }
.connect-more summary::before { content: "▸ "; color: var(--ember); }
.connect-more[open] summary::before { content: "▾ "; }
.modal-warn {
  margin: 18px 0 0;
  padding: 11px 14px;
  border: 1px solid var(--gold);
  background: var(--gold-dim);
  border-radius: 9px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink);
}

/* ============ MESSAGES ============ */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 28px 0 16px;
  display: flex;
  flex-direction: column;
  /* no smooth scrolling — it fights stick-to-bottom during streaming */
}
.msg-row {
  width: 100%;
  max-width: 780px;
  margin: 0 auto 26px;
  padding: 0 28px;
  animation: msg-in 0.45s var(--ease-out) both;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.msg-label {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 7px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 700;
}
.msg-row.user .msg-label { color: var(--ink-faint); justify-content: flex-end; }
.msg-row.assistant .msg-label { color: var(--ember); }
.msg-label .model-tag {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 10.5px;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--ink-faint);
  background: var(--bg-overlay);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 7px;
  line-height: 1.5;
}

.msg-row.user .msg-body {
  background: var(--user-bubble);
  border: 1px solid var(--glass-border);
  border-radius: 18px 18px 18px 5px;
  padding: 13px 18px;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  box-shadow: var(--shadow-sm), inset 0 1px 0 var(--glass-hi);
  width: fit-content;
  max-width: 100%;
  margin-left: auto;
}
.msg-row.assistant .msg-body {
  font-family: var(--font-prose);
  font-size: 16.5px;
  line-height: 1.72;
  color: var(--ink);
  letter-spacing: 0.002em;
  text-wrap: pretty;
}

.msg-images {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.msg-row.user .msg-images { justify-content: flex-end; }
.msg-row.user .msg-foot { justify-content: flex-end; }
.msg-images img {
  max-height: 140px;
  max-width: 220px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

/* markdown inside assistant prose */
.msg-body h1, .msg-body h2, .msg-body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.015em;
  margin: 1.5em 0 0.5em;
  line-height: 1.2;
  color: var(--ink);
  text-wrap: balance;
}
.msg-body h1 {
  font-size: 1.72em;
  padding-bottom: 0.34em;
  border-bottom: 1px solid var(--line-soft);
}
.msg-body h2 {
  font-size: 1.4em;
  position: relative;
  padding-left: 14px;
}
.msg-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.16em;
  bottom: 0.16em;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--ember), var(--gold));
}
.msg-body h3 { font-size: 1.16em; color: var(--ink); }
.msg-body h4 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.02em;
  letter-spacing: 0.02em;
  margin: 1.2em 0 0.4em;
  color: var(--ink);
}
.msg-body h1:first-child, .msg-body h2:first-child, .msg-body h3:first-child, .msg-body h4:first-child { margin-top: 0.2em; }
.msg-body p { margin: 0.75em 0; }
.msg-body > :first-child { margin-top: 0; }
.msg-body > :last-child { margin-bottom: 0; }
.msg-body a {
  color: var(--ember);
  text-decoration-color: color-mix(in srgb, var(--ember) 45%, transparent);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.2s;
}
.msg-body a:hover { text-decoration-color: var(--ember); }
.msg-body strong { color: var(--ink); font-weight: 700; }
.msg-body blockquote {
  margin: 1.1em 0;
  padding: 7px 0 7px 18px;
  border-left: 3px solid var(--ember);
  color: var(--ink-dim);
  font-style: italic;
  background: linear-gradient(90deg, var(--ember-dim), transparent 72%);
  border-radius: 0 8px 8px 0;
}
.msg-body blockquote p:first-child { margin-top: 0; }
.msg-body blockquote p:last-child { margin-bottom: 0; }
.msg-body ul, .msg-body ol { padding-left: 1.5em; margin: 0.7em 0; }
.msg-body li { margin: 0.32em 0; }
.msg-body li::marker { color: var(--ember); }
.msg-body ul ul, .msg-body ol ol, .msg-body ul ol, .msg-body ol ul { margin: 0.3em 0; }
.msg-body hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 1.6em 0;
}
.msg-body table {
  border-collapse: collapse;
  margin: 1.1em 0;
  font-family: var(--font-body);
  font-size: 0.86em;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.msg-body th, .msg-body td {
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
  padding: 9px 13px;
  text-align: left;
}
.msg-body th:last-child, .msg-body td:last-child { border-right: 0; }
.msg-body tr:last-child td { border-bottom: 0; }
.msg-body th {
  background: var(--bg-overlay);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.msg-body tbody tr:nth-child(even) { background: var(--glass-hi); }
.msg-body code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg-overlay);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1.5px 6px;
  color: var(--gold);
}
[data-theme="light"] .msg-body code { color: var(--ember); }
.msg-body pre {
  position: relative;
  margin: 1.15em 0;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0b1018;
  overflow: hidden;
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
[data-theme="light"] .msg-body pre { background: #131c2e; border-color: #2a3650; }
.msg-body pre code {
  display: block;
  padding: 16px 18px;
  background: none;
  border: 0;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.65;
  color: inherit;
  font-variant-ligatures: none;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px 9px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  color: var(--ink-faint);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.code-head::before {
  content: "";
  flex-shrink: 0;
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 14px 0 0 var(--gold), 28px 0 0 var(--line);
  opacity: 0.85;
  margin-right: 16px;
}
.code-head > span:first-of-type { margin-right: auto; color: var(--ink-dim); }
.code-copy {
  border: 0;
  background: none;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  cursor: pointer;
  padding: 3px 9px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.code-copy:hover { color: var(--ember-bright); background: var(--ember-dim); }

/* thinking accordion */
.thinking-box {
  margin: 0 0 12px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: linear-gradient(170deg, var(--ember-dim), transparent 42%);
  font-family: var(--font-body);
  overflow: hidden;
  transition: border-color 0.2s, background 0.2s;
}
.thinking-box[open] { border-style: solid; border-color: color-mix(in srgb, var(--ember) 35%, var(--line)); }
.thinking-box summary {
  cursor: pointer;
  list-style: none;
  padding: 9px 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
  transition: color 0.2s;
}
.thinking-box summary:hover { color: var(--ink); }
.thinking-box summary::-webkit-details-marker { display: none; }
.thinking-box summary::before {
  content: "◆";
  color: var(--ember);
  font-size: 9px;
  transition: transform 0.25s;
}
.thinking-box[open] summary::before { transform: rotate(90deg); }
.thinking-box.live summary::before { text-shadow: 0 0 8px var(--ember-glow); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { /* opacity-only = composited, no per-frame paint */
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.thinking-content {
  padding: 4px 16px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
  white-space: pre-wrap;
  max-height: 320px;
  overflow-y: auto;
}

.msg-foot {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 9px;
  opacity: 0;
  transition: opacity 0.2s;
}
.msg-row:hover .msg-foot { opacity: 1; }
.msg-foot .usage {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-faint);
  margin-right: auto;
}
.msg-foot button {
  border: 0;
  background: none;
  color: var(--ink-faint);
  font-size: 11.5px;
  font-family: var(--font-body);
  cursor: pointer;
  padding: 3px 9px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.msg-foot button:hover { color: var(--ember); background: var(--ember-dim); }

/* streaming cursor */
.cursor {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  vertical-align: text-bottom;
  background: var(--ember);
  border-radius: 2px;
  margin-left: 3px;
  animation: flicker 0.9s ease-in-out infinite;
  box-shadow: 0 0 10px var(--ember-glow);
}
@keyframes flicker {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  40% { opacity: 0.5; transform: scaleY(0.9); }
  60% { opacity: 0.85; transform: scaleY(1.04); }
}

.notice {
  max-width: 780px;
  margin: 0 auto 22px;
  padding: 0 28px;
}
.notice-inner {
  border: 1px solid var(--danger);
  background: rgba(217, 106, 95, 0.09);
  color: var(--danger);
  padding: 11px 16px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: var(--shadow-xs);
}
.notice-inner.soft {
  border-color: var(--line);
  background: var(--bg-overlay);
  color: var(--ink-dim);
  box-shadow: none;
}

/* empty state — vertically centred so it sits well on short & tall viewports */
.empty-state {
  max-width: 620px;
  margin: auto;
  padding: 4vh 28px 2vh;
  text-align: center;
  animation: rise 0.8s var(--ease-out) both;
}
/* soaring eagle */
.eagle-stage {
  position: relative;
  width: 300px;
  max-width: 80%;
  margin: 0 auto;
  filter: drop-shadow(0 16px 32px rgba(0, 0, 0, 0.45));
}
.eagle-stage::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 38%;
  width: 360px;
  height: 220px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, var(--ember-dim), transparent 66%);
  z-index: -1;
  animation: pulse-glow 6s ease-in-out infinite;
}
.eagle {
  width: 100%;
  height: auto;
  display: block;
  animation: soar 6s ease-in-out infinite;
  transform-origin: center;
}
@keyframes soar {
  0%, 100% { transform: translateY(0) rotate(-1.5deg); }
  50% { transform: translateY(-12px) rotate(1.5deg); }
}
.wing { transform-origin: 150px 82px; animation: flap 3.2s ease-in-out infinite; }
.wing-r { animation-delay: 0s; }
.wing-l { animation-delay: 0s; }
@keyframes flap {
  0%, 100% { transform: rotate(0deg) scaleY(1); }
  50% { transform: rotate(0deg) scaleY(0.93) translateY(2px); }
}
.eagle-star { transform-origin: 150px 84px; animation: dot-pulse 2.4s ease-in-out infinite; }
@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.9; transform: translate(-50%, -50%) scale(1.1); }
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(44px, 7.2vw, 78px);
  letter-spacing: 0.06em;
  margin: 12px 0 2px;
  line-height: 0.95;
  text-wrap: balance;
  background: linear-gradient(180deg, #fff 0%, var(--gold-bright) 30%, var(--gold) 60%, #a9781a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 44px var(--gold-dim);
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.35));
}
[data-theme="light"] .hero-title {
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 45%, #8a3a22 115%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: none;
}
.hero-quote {
  position: relative;
  min-height: 1.5em;
  color: var(--ink-dim);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(16px, 2.3vw, 22px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 14px auto 36px;
  padding-top: 18px;
  max-width: 90%;
  transition: opacity 0.45s, transform 0.45s var(--ease-out);
}
.hero-quote::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.75;
  margin: 0;
}
.hero-quote.fading { opacity: 0; transform: translateY(6px); }
.starter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.starter {
  position: relative;
  padding: 17px 40px 17px 18px;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  background: var(--bg-raised);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  color: var(--ink-dim);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13.5px;
  line-height: 1.4;
  cursor: pointer;
  text-align: left;
  overflow: hidden;
  box-shadow: var(--shadow-sm), inset 0 1px 0 var(--glass-hi);
  transition: border-color 0.25s, color 0.25s, transform 0.2s var(--ease-out), box-shadow 0.25s;
  animation: rise 0.6s var(--ease-out) both;
}
.starter::after {
  content: "→";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  color: var(--ember);
  font-size: 15px;
  opacity: 0;
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}
.starter:hover::after { opacity: 1; transform: translateY(-50%) translateX(0); }
.starter:nth-child(1) { animation-delay: 0.05s; }
.starter:nth-child(2) { animation-delay: 0.11s; }
.starter:nth-child(3) { animation-delay: 0.17s; }
.starter:nth-child(4) { animation-delay: 0.23s; }
.starter::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--ember-dim), transparent 60%);
  opacity: 0;
  transition: opacity 0.25s;
}
.starter:hover {
  border-color: var(--ember);
  color: var(--ink);
  transform: translateY(-3px);
  box-shadow: 0 14px 34px -6px var(--ember-glow), 0 0 0 1px var(--ember-dim), inset 0 1px 0 var(--glass-hi);
}
.starter:hover::before { opacity: 1; }
.starter > * { position: relative; }

/* ============ COMPOSER ============ */
.composer-wrap {
  padding: 10px 28px 18px;
  max-width: 836px;
  margin: 0 auto;
  width: 100%;
}
.attach-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 0 10px;
}
.attach-chip {
  position: relative;
}
.attach-chip img {
  height: 58px;
  width: 58px;
  object-fit: cover;
  border-radius: 9px;
  border: 1px solid var(--line);
}
.attach-chip button {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-overlay);
  color: var(--ink-dim);
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.15s;
}
.attach-chip button:hover { color: var(--danger); border-color: var(--danger); background: var(--bg-overlay); transform: scale(1.12); }

.composer {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  background: var(--bg-input);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
  padding: 10px 11px;
  box-shadow: var(--shadow), inset 0 1px 0 var(--glass-hi);
  transition: border-color 0.25s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.2s var(--ease-out);
}
.composer:hover { border-color: var(--line); }
.composer:focus-within {
  border-color: color-mix(in srgb, var(--ember) 32%, var(--glass-border));
  box-shadow:
    0 18px 56px -16px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 var(--glass-hi);
  transform: translateY(-1px);
}
.composer textarea {
  flex: 1;
  resize: none;
  border: 0;
  background: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.55;
  outline: none;
  max-height: 220px;
  padding: 7px 4px;
}
.composer textarea::placeholder { color: var(--ink-faint); font-style: italic; }

.send-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(155deg, var(--ember-bright), var(--ember));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 6px 16px var(--ember-glow), inset 0 1px 0 rgba(255, 255, 255, 0.28);
  transition: transform 0.15s var(--ease-out), box-shadow 0.2s, filter 0.2s;
  flex-shrink: 0;
}
.send-btn:hover {
  filter: brightness(1.08);
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 10px 28px var(--ember-glow), inset 0 1px 0 rgba(255, 255, 255, 0.32);
}
.send-btn:disabled { opacity: 0.45; cursor: default; transform: none; box-shadow: none; }
.send-btn.stop {
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
}
.send-btn.stop:hover { background: rgba(217, 106, 95, 0.12); box-shadow: none; }
.attach-btn { align-self: flex-end; margin-bottom: 2px; }

.composer-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 6px 0;
}
.model-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--glass-border);
  background: var(--bg-raised);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  cursor: pointer;
  box-shadow: inset 0 1px 0 var(--glass-hi);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.15s;
}
.model-chip:hover {
  border-color: var(--ember);
  color: var(--ink);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--ember-dim), inset 0 1px 0 var(--glass-hi);
}
.model-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 10px var(--ember-glow);
  animation: dot-pulse 2.5s ease-in-out infinite;
}
@keyframes dot-pulse { /* opacity-only = composited */
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}
.build-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--glass-border);
  background: var(--bg-raised);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--ink-dim);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: 0.03em;
  cursor: pointer;
  box-shadow: inset 0 1px 0 var(--glass-hi);
  transition: all 0.2s var(--ease-out);
}
.build-toggle svg { color: var(--ink-faint); transition: color 0.2s; }
.build-toggle:hover { color: var(--ink); border-color: var(--gold); }
.build-toggle.on {
  border-color: var(--gold);
  color: #1a1208;
  background: linear-gradient(155deg, #f3d27a, var(--gold));
  box-shadow: 0 6px 18px var(--gold-dim), inset 0 1px 0 rgba(255, 255, 255, 0.38);
}
.build-toggle.on svg { color: #1a1208; }
.convo-cost {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin-left: auto;
}

/* ============ SETTINGS DRAWER ============ */
.drawer-scrim {
  position: fixed;
  inset: 0;
  background: var(--scrim);
  z-index: 40;
  animation: fade 0.25s both;
}
@keyframes fade { from { opacity: 0; } }
.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(400px, 92vw);
  background: var(--bg-raised);
  backdrop-filter: blur(20px) saturate(1.25);
  -webkit-backdrop-filter: blur(20px) saturate(1.25);
  border-left: 1px solid var(--glass-border);
  z-index: 50;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg), inset 1px 0 0 var(--glass-hi);
  animation: slide-in 0.35s var(--ease-out) both;
}
@keyframes slide-in {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: none; opacity: 1; }
}
.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--glass-hi), transparent);
}
.drawer-head h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}
.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px 30px;
}
.set-group { margin-bottom: 26px; }
.set-group h4 {
  position: relative;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 11px;
  padding-left: 11px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.set-group h4::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1px;
  width: 3px;
  height: 11px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), var(--gold-dim));
}
.hint {
  font-size: 10.5px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-faint);
  font-weight: 400;
}

.model-cards { display: flex; flex-direction: column; gap: 8px; }
.model-card {
  position: relative;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-input);
  padding: 12px 14px;
  cursor: pointer;
  color: var(--ink);
  font-family: var(--font-body);
  overflow: hidden;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s, transform 0.15s, background 0.2s;
}
.model-card:hover {
  border-color: var(--ink-faint);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.model-card.active {
  border-color: color-mix(in srgb, var(--ember) 40%, var(--line));
  background: linear-gradient(150deg, var(--ember-dim), var(--bg-input) 72%);
  box-shadow: 0 0 0 1px var(--ember-dim), 0 8px 24px -10px var(--ember-glow), inset 0 1px 0 var(--glass-hi);
}
.model-card.active .mc-name { color: var(--ember-bright); }
.model-card.active::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--ember-bright), var(--ember));
  box-shadow: 0 0 10px var(--ember-glow);
}
.model-card .mc-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}
.model-card .mc-name { font-weight: 700; font-size: 14px; }
.model-card .mc-price {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-faint);
  white-space: nowrap;
}
.model-card .mc-tag {
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 4px;
  font-style: italic;
  font-family: var(--font-prose);
}

.seg {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  padding: 4px;
  border: 1px solid var(--line-soft);
  border-radius: 11px;
  background: var(--bg-input);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.12);
}
.seg button {
  flex: 1;
  min-width: 52px;
  padding: 7px 4px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: none;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.18s var(--ease-out), background 0.18s, box-shadow 0.18s;
}
.seg button:hover { color: var(--ink); }
.seg button.active {
  color: var(--ember-bright);
  background: var(--ember-dim);
  border-color: color-mix(in srgb, var(--ember) 45%, transparent);
  box-shadow: 0 3px 10px -3px var(--ember-glow), inset 0 1px 0 var(--glass-hi);
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13.5px;
  cursor: pointer;
}
.toggle-row input { display: none; }
.toggle {
  width: 38px;
  height: 21px;
  border-radius: 999px;
  background: var(--line);
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25);
}
.toggle::after {
  content: "";
  position: absolute;
  top: 2.5px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-dim);
  transition: transform 0.25s var(--ease-out), background 0.2s;
}
.toggle-row input:checked + .toggle {
  background: var(--ember-dim);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ember) 40%, transparent);
}
.toggle-row input:checked + .toggle::after {
  transform: translateX(16px);
  background: var(--ember);
  box-shadow: 0 0 10px var(--ember-glow);
}

input[type="range"] {
  width: 100%;
  --fill: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 22px;
  background: transparent;
  cursor: pointer;
  accent-color: var(--ember);
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 99px;
  background:
    linear-gradient(90deg, var(--ember) var(--fill), var(--bg-input) var(--fill));
  border: 1px solid var(--line-soft);
}
input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 99px;
  background: var(--bg-input);
  border: 1px solid var(--line-soft);
}
input[type="range"]::-moz-range-progress {
  height: 6px;
  border-radius: 99px;
  background: var(--ember);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--ember-bright), var(--ember));
  border: 2px solid var(--bg-raised-solid);
  box-shadow: 0 2px 8px var(--ember-glow);
  transition: transform 0.15s var(--ease-out), box-shadow 0.2s;
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--ember-bright), var(--ember));
  border: 2px solid var(--bg-raised-solid);
  box-shadow: 0 2px 8px var(--ember-glow);
}
input[type="range"]:hover::-webkit-slider-thumb { transform: scale(1.12); box-shadow: 0 3px 12px var(--ember-glow); }
input[type="range"]:active::-webkit-slider-thumb { transform: scale(0.96); }

.preset-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.preset {
  border: 1px solid var(--line);
  background: var(--bg-input);
  color: var(--ink-dim);
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 11.5px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s, box-shadow 0.15s;
}
.preset:hover { border-color: var(--ember); color: var(--ember-bright); }
.preset.active {
  border-color: var(--ember);
  color: var(--ember-bright);
  background: var(--ember-dim);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}

.set-group textarea,
.set-group input[type="password"],
.set-group input[type="url"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg-input);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 10px 12px;
  outline: none;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.set-group textarea:focus,
.set-group input[type="password"]:focus,
.set-group input[type="url"]:focus {
  border-color: var(--ember);
  box-shadow: 0 0 0 3px var(--ember-dim);
}
.fine {
  font-size: 11px;
  color: var(--ink-faint);
  margin: 7px 0 0;
  line-height: 1.45;
}

.key-row { display: flex; gap: 8px; }
.key-row input { flex: 1; }
.key-save {
  border: 1px solid var(--ember);
  background: var(--ember-dim);
  color: var(--ember-bright);
  border-radius: 9px;
  padding: 0 16px;
  font-family: var(--font-body);
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}
.key-save:hover { background: var(--ember); color: #ffffff; transform: translateY(-1px); }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 99px;
  border: 3px solid transparent;
  background-clip: content-box;
  transition: background 0.2s;
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); background-clip: content-box; }
::-webkit-scrollbar-thumb:active { background: var(--ember); background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-corner { background: transparent; }

/* drag-over state */
body.dragging .composer {
  border-color: var(--ember);
  box-shadow: 0 0 0 2px var(--ember-dim), 0 0 40px var(--ember-dim);
}

@media (max-width: 760px) {
  .sidebar {
    position: fixed;
    z-index: 30;
    height: 100dvh;
    box-shadow: var(--shadow);
    transition: transform 0.3s var(--ease-out);
    will-change: transform;
  }
  .sidebar.collapsed { margin-left: 0; transform: translateX(-101%); }
  /* 16px on inputs stops iOS Safari auto-zooming on focus */
  .search-wrap input, .set-group input, .composer textarea { font-size: 16px; }
  .starter-grid { grid-template-columns: 1fr; }
  .msg-row { padding: 0 16px; }
  .composer-wrap { padding: 8px 14px calc(14px + env(safe-area-inset-bottom)); }
  /* tighter header + icon-only connect button so nothing crowds */
  .chat-head { padding: 11px 14px; gap: 8px; }
  .connect-btn { padding: 0 11px; }
  .connect-btn .cb-label { display: none; }
  .head-actions { gap: 4px; }
  .drawer { padding-right: env(safe-area-inset-right); }
  /* dim the chat when the sidebar is pulled over it; tapping it closes (see app.js .main handler) */
  .sidebar:not(.collapsed) ~ .main::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 25;
    background: var(--scrim);
    backdrop-filter: blur(1.5px);
    -webkit-backdrop-filter: blur(1.5px);
    animation: fade 0.25s both;
  }
}

/* ============================================================
   POLISH PASS — type rendering, a11y focus, motion, tactility
   purely additive; no layout changes to the above
   ============================================================ */

/* crisper type + no grey tap-flash on mobile */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}

/* themed text selection */
::selection { background: var(--ember); color: #fff; text-shadow: none; }

/* ember caret in every text field */
textarea, input { caret-color: var(--ember); }

/* Firefox scrollbars (webkit handled separately above) */
* { scrollbar-width: thin; scrollbar-color: var(--line) transparent; }

/* stop scroll-chaining out of inner panes */
.messages, .convo-list, .drawer-body, .thinking-content, .modal { overscroll-behavior: contain; }

/* keyboard focus rings — shown for keyboard nav, never on mouse click */
:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 2px;
  border-radius: 8px;
}
.send-btn:focus-visible,
.icon-btn:focus-visible,
.model-chip:focus-visible,
.build-toggle:focus-visible,
.connect-btn:focus-visible { outline-offset: 3px; }
button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
summary:focus:not(:focus-visible) { outline: none; }

/* tactile press feedback */
.btn-new:active,
.connect-btn:active,
.starter:active,
.model-chip:active,
.build-toggle:active,
.key-save:active,
.foot-btn:active,
.preset:active,
.seg button:active { transform: translateY(0) scale(0.97); }
.send-btn:active:not(:disabled) { transform: scale(0.93); filter: brightness(0.96); }
.icon-btn:active { transform: scale(0.9); }
.snip-copy:active,
.code-copy:active { transform: scale(0.94); }

/* ============================================================
   FX PASS — purely-additive cool effects (CSS only, no JS)
   layers on top of everything; respects reduce-motion below
   ============================================================ */

/* animated ember rail down the active conversation — a travelling glow */
.convo-item.active::before {
  background: linear-gradient(180deg, var(--ember-bright), var(--ember)) no-repeat,
              linear-gradient(180deg, var(--ember), var(--ember)) no-repeat;
  background-size: 100% 40%, 100% 100%;
  background-repeat: no-repeat;
  animation: hlRail 2.6s var(--ease-out) infinite;
}
@keyframes hlRail {
  0% { background-position: 0 -40%, 0 0; }
  100% { background-position: 0 140%, 0 0; }
}

/* wordmark: a soft gold halo that breathes behind the full title */
.wordmark { animation: hlWordmark 8s ease-in-out infinite; }
@keyframes hlWordmark {
  0%, 100% { filter: drop-shadow(0 0 0 transparent); }
  50% { filter: drop-shadow(0 0 10px var(--gold-dim)); }
}

/* stripes under the wordmark: a continuous parade sweep */
.stripes {
  background-size: 200% 100%;
  animation: hlStripes 7s linear infinite;
}
@keyframes hlStripes { from { background-position: 0 0; } to { background-position: -200% 0; } }

/* assistant message label: a small igniting glow when the row first appears */
.msg-row.assistant .msg-label { animation: hlLabelGlow 0.6s var(--ease-out) both; }
@keyframes hlLabelGlow {
  from { opacity: 0; text-shadow: 0 0 14px var(--ember-glow); transform: translateX(-4px); }
  to { opacity: 1; text-shadow: none; transform: none; }
}

/* icon buttons: a quick radial flash on focus (keyboard) */
.icon-btn:focus-visible, .send-btn:focus-visible, .connect-btn:focus-visible {
  box-shadow: 0 0 0 3px var(--ember-dim), 0 0 18px -4px var(--ember-glow);
}

/* composer: a faint ember underline that brightens while focused */
.composer-wrap { position: relative; }
.composer-wrap::after { display: none; } /* minimal: no ember underline glow on focus */
.composer:focus-within ~ .composer-foot,
.composer-wrap:focus-within::after { opacity: 0.5; transform: scaleX(1); }

/* model-card: a thin top sheen that tracks in on hover */
.model-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim) 30%, var(--gold) 50%, var(--gold-dim) 70%, transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.model-card:hover::before { opacity: 0.8; }
.model-card.active::before { opacity: 1; background: linear-gradient(90deg, transparent, var(--ember) 50%, transparent); }

/* respect the OS "reduce motion" setting — kill ambient + decorative loops */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .grain { display: none; }
  body::before { animation: none; }
  .cursor { animation: none; opacity: 1; }
}