/* ============== TOKENS ============== */
:root {
  --accent-h: 40;
  --accent-c: 0.12;
  --accent-l: 0.52;
  --accent: oklch(var(--accent-l) var(--accent-c) var(--accent-h));
  --accent-soft: oklch(0.92 calc(var(--accent-c) * 0.5) var(--accent-h));
  --accent-tint: oklch(0.97 calc(var(--accent-c) * 0.25) var(--accent-h));

  --paper:    #F7F3EC;
  --paper-2:  #F1ECE2;
  --paper-3:  #ECE5D7;
  --ink:      #1B1814;
  --ink-2:    #3A332A;
  --ink-3:    #6B6358;
  --ink-4:    #9C9282;
  --rule:     #E2DBCA;
  --rule-2:   #CFC6B2;
  --hairline: rgba(27,24,20,0.08);

  --bg:        var(--paper);
  --bg-elev:   #FBF8F2;
  --bg-deep:   var(--paper-2);
  --fg:        var(--ink);
  --fg-2:      var(--ink-2);
  --fg-mute:   var(--ink-3);
  --fg-faint:  var(--ink-4);
  --border:    var(--rule);
  --border-2:  var(--rule-2);

  --serif:  "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans:   "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono:   "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  --pad-sidebar: 14px;
  --shadow-sm: 0 1px 0 rgba(27,24,20,0.04);
  --shadow-md: 0 1px 2px rgba(27,24,20,0.04), 0 8px 24px rgba(27,24,20,0.06);
  --shadow-lg: 0 1px 2px rgba(27,24,20,0.04), 0 16px 48px rgba(27,24,20,0.10);
}

[data-theme="dark"] {
  --paper:    #1A1714;
  --paper-2:  #211D19;
  --paper-3:  #2A2520;
  --ink:      #F1ECE2;
  --ink-2:    #D9D2C4;
  --ink-3:    #9C9282;
  --ink-4:    #6B6358;
  --rule:     #2F2A24;
  --rule-2:   #3D372F;
  --hairline: rgba(241,236,226,0.08);

  --bg: var(--paper);
  --bg-elev: #221E1A;
  --bg-deep: #14110E;
  --fg: var(--ink);
  --fg-2: var(--ink-2);
  --fg-mute: var(--ink-3);
  --fg-faint: var(--ink-4);
  --border: var(--rule);
  --border-2: var(--rule-2);

  --accent: oklch(0.74 var(--accent-c) var(--accent-h));
  --accent-soft: oklch(0.32 calc(var(--accent-c) * 0.7) var(--accent-h));
  --accent-tint: oklch(0.24 calc(var(--accent-c) * 0.5) var(--accent-h));
  --shadow-md: 0 1px 2px rgba(0,0,0,0.4), 0 8px 24px rgba(0,0,0,0.35);
  --shadow-lg: 0 1px 2px rgba(0,0,0,0.4), 0 16px 48px rgba(0,0,0,0.55);
}

[data-density="compact"] {
  --pad-sidebar: 10px;
}

/* ============== BASE ============== */
* { box-sizing: border-box; }
html, body, #root { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button { font-family: inherit; color: inherit; cursor: pointer; }
input, textarea { font-family: inherit; color: inherit; }
kbd {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-bottom-width: 1.5px;
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--fg-mute);
  letter-spacing: 0;
}
em { font-style: italic; color: var(--accent); }

/* ============== APP SHELL ============== */
.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
  background: var(--bg);
  transition: grid-template-columns .32s cubic-bezier(.6,.05,.2,1);
}
[data-density="compact"] .app { grid-template-columns: 240px 1fr; }
.app:has(.sidebar[data-visible="false"]) { grid-template-columns: 0px 1fr; }
.sidebar {
  overflow: hidden;
  transition: opacity .22s ease, transform .32s cubic-bezier(.6,.05,.2,1);
  min-width: 0;
}
.sidebar[data-visible="false"] {
  opacity: 0;
  transform: translateX(-12px);
  pointer-events: none;
}

.main {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
  background: var(--bg);
  position: relative;
}

/* ============== SIDEBAR ============== */
.sidebar {
  background: var(--bg-deep);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: var(--pad-sidebar);
  gap: 10px;
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 6px 2px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 0; padding: 4px 0;
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.brand-mark { color: var(--accent); display: inline-flex; }
.brand-name { font-weight: 500; }
.brand-dot { color: var(--accent); margin: 0 1px; }
.close-mobile { display: none; }

.new-chat {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 9px 12px;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 500;
  width: 100%;
  text-align: left;
  transition: background .12s, border-color .12s;
}
.new-chat:hover { border-color: var(--border-2); background: var(--bg); }
.new-chat svg { color: var(--accent); }
.new-chat kbd { margin-left: auto; }

.search {
  display: flex; align-items: center; gap: 7px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: var(--r-md);
  padding: 7px 10px;
}
.search svg { color: var(--fg-mute); flex: none; }
.search input {
  background: none; border: 0; outline: 0;
  width: 100%; font-size: 13px; color: var(--fg);
}
.search input::placeholder { color: var(--fg-faint); }

.sidebar-scroll {
  flex: 1; min-height: 0;
  overflow-y: auto;
  padding: 4px 2px;
  margin: 0 -4px;
}
.sidebar-scroll::-webkit-scrollbar { width: 8px; }
.sidebar-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.side-section { margin-bottom: 14px; }
.side-section-h {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-faint);
  padding: 4px 8px; margin-top: 6px; margin-bottom: 4px;
}

.project-row {
  display: flex; align-items: center; gap: 7px;
  width: 100%; background: none; border: 0;
  padding: 6px 8px; border-radius: var(--r-sm);
  font-size: 13px; color: var(--fg-2);
  text-align: left;
}
.project-row:hover { background: var(--bg-elev); }
.project-row .project-icon { color: var(--accent); flex: none; }
.project-name { flex: 1; font-weight: 500; }
.project-count {
  font-family: var(--mono); font-size: 11px;
  color: var(--fg-faint);
  background: var(--bg-elev); padding: 1px 6px; border-radius: 99px;
}
.project-children { padding-left: 18px; }

.convo-row {
  display: block; width: 100%;
  background: none; border: 0;
  padding: 6px 10px; border-radius: var(--r-sm);
  font-size: 13px; color: var(--fg-2);
  text-align: left;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  position: relative;
}
.convo-row:hover { background: var(--bg-elev); color: var(--fg); }
.convo-row.active {
  background: var(--accent-tint);
  color: var(--fg);
}
.convo-row.active::before {
  content: ""; position: absolute; left: 2px; top: 7px; bottom: 7px;
  width: 2px; background: var(--accent); border-radius: 2px;
}

.side-empty {
  font-size: 12px; color: var(--fg-faint);
  padding: 12px; font-style: italic;
}

.sidebar-foot {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  display: flex; flex-direction: column; gap: 2px;
}
.foot-link {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 0;
  padding: 7px 8px; border-radius: var(--r-sm);
  font-size: 13px; color: var(--fg-2);
  text-align: left;
}
.foot-link:hover { background: var(--bg-elev); color: var(--fg); }
.foot-link svg { color: var(--fg-mute); }
.foot-link.account { padding: 6px 6px; }
.avatar {
  width: 26px; height: 26px;
  background: var(--accent);
  color: var(--bg-elev);
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-weight: 600; font-size: 13px;
}
.account-name { flex: 1; font-weight: 500; }
.plan-pill {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--fg-mute);
  border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 99px;
}
.plan-pill.big {
  font-size: 12px; padding: 4px 10px;
}

/* ============== TOPBAR ============== */
.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky; top: 0; z-index: 5;
  min-height: 54px;
}
.mobile-menu { display: none; }
.sidebar-toggle { display: inline-flex; }
@media (max-width: 760px) { .sidebar-toggle { display: none; } }
.topbar-title {
  flex: 1; min-width: 0;
  display: flex; align-items: baseline; gap: 8px;
  font-family: var(--serif);
  font-size: 15px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.crumb { color: var(--fg-mute); font-family: var(--sans); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.crumb-sep { color: var(--fg-faint); }
.crumb-muted { color: var(--fg-mute); font-style: italic; }

.topbar-right { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  background: none; border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--fg-2);
}
.icon-btn:hover { background: var(--bg-elev); border-color: var(--border); color: var(--fg); }

/* MODEL PICKER */
.model-picker { position: relative; }
.model-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 6px 10px;
  font-size: 13px; font-weight: 500; color: var(--fg);
}
.model-btn:hover { border-color: var(--border-2); }
.model-glyph { color: var(--accent); font-size: 13px; line-height: 1; }
.model-menu {
  position: absolute; right: 0; top: calc(100% + 6px);
  width: 260px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  padding: 6px;
  z-index: 30;
}
.model-menu-up { top: auto; bottom: calc(100% + 6px); right: auto; left: 0; }
.model-menu-h {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-faint);
  padding: 6px 8px 4px;
}
.model-opt {
  display: flex; align-items: center; gap: 10px;
  width: 100%; background: none; border: 0;
  padding: 8px 8px; border-radius: var(--r-sm);
  text-align: left; font-size: 13px;
}
.model-opt:hover { background: var(--bg-deep); }
.model-opt.selected { background: var(--accent-tint); }
.model-opt-text { display: flex; flex-direction: column; flex: 1; }
.model-opt-label { font-weight: 500; color: var(--fg); }
.model-opt-sub { font-size: 11px; color: var(--fg-mute); }

/* ============== EMPTY STATE ============== */
.empty {
  display: flex; align-items: center; justify-content: center;
  padding: 32px 24px;
  overflow-y: auto;
}
.empty-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.greeting {
  display: flex;
  align-items: center;
  gap: 22px;
}
.greeting-mark {
  width: 72px; height: 72px;
  object-fit: contain;
  flex: none;
}
.dark-only { display: none; }
[data-theme="dark"] .light-only { display: none; }
[data-theme="dark"] .dark-only  { display: inline-block; }
.empty-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--fg);
}
@media (max-height: 700px) {
  .empty { align-items: flex-start; }
}
@media (max-width: 760px) {
  .greeting { gap: 14px; }
  .greeting-mark { width: 48px; height: 48px; }
  .empty-title { font-size: 32px; }
  .empty-sub { margin-left: 62px; }
}
.empty-inner {
  width: min(720px, 100%);
  text-align: left;
}
.eyebrow { display: none; }
.empty-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--fg);
}
.empty-sub {
  max-width: 520px;
  margin: -8px 0 0 94px;
  color: var(--fg-mute);
  font-size: 14px;
}
/* (suggestion grid styles removed; empty state now centered greeting only) */

/* ============== THREAD ============== */
.thread-wrap {
  overflow-y: auto;
  padding: 24px 24px 40px;
  scroll-behavior: smooth;
}
.thread {
  width: min(740px, 100%);
  margin: 0 auto;
  display: flex; flex-direction: column; gap: 28px;
}
[data-density="compact"] .thread { gap: 18px; }

.thread-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 6px;
}
.thread-project {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
  margin-bottom: 8px;
}
.thread-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--fg);
}
.thread-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--fg-faint);
}

.msg {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  position: relative;
}
.msg-rail {
  width: 2px;
  background: var(--border-2);
  border-radius: 2px;
  margin: 6px 0;
  justify-self: center;
}
.msg-mark {
  width: 24px; height: 24px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--accent);
  margin-top: 1px;
}
.msg-body { min-width: 0; }
.msg-head {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin-bottom: 6px;
}
.msg-author { color: var(--fg-mute); }
.msg-asst .msg-author { color: var(--accent); }
.msg-edit {
  margin-left: auto;
  background: none; border: 0;
  font-family: var(--sans); font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.06em; text-transform: uppercase;
  opacity: 0;
  transition: opacity .15s;
}
.msg:hover .msg-edit { opacity: 1; }
.msg-edit:hover { color: var(--accent); }

.msg-text, .rich-p {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.7;
  margin: 0 0 12px;
  color: var(--fg);
  text-wrap: pretty;
}
.user-text {
  color: var(--fg-2);
}
.rich-p:last-child { margin-bottom: 0; }
.rich-list {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.7;
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--fg);
}
.rich-list li { margin-bottom: 4px; }

.caret {
  display: inline-block;
  width: 7px; height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.streaming-dot {
  display: inline-flex; gap: 3px;
  margin-left: 4px;
}
.streaming-dot span {
  width: 4px; height: 4px;
  background: var(--accent); border-radius: 50%;
  animation: bounce 1s ease-in-out infinite;
}
.streaming-dot span:nth-child(2) { animation-delay: .1s; }
.streaming-dot span:nth-child(3) { animation-delay: .2s; }
@keyframes bounce {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50%      { opacity: 1; transform: translateY(-2px); }
}

.msg-edit-wrap {
  background: var(--bg-elev);
  border: 1px solid var(--accent);
  border-radius: var(--r-md);
  padding: 10px 12px;
}
.msg-edit-input {
  width: 100%; background: none; border: 0; outline: 0;
  resize: none;
  font-family: var(--serif); font-size: 16px; line-height: 1.7;
  color: var(--fg);
}
.msg-edit-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  margin-top: 10px;
}

.msg-tools {
  display: flex; gap: 4px;
  margin-top: 4px;
  opacity: 0;
  transition: opacity .15s;
}
.msg:hover .msg-tools { opacity: 1; }
.tool-btn {
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  background: none; border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--fg-mute);
}
.tool-btn:hover { background: var(--bg-elev); border-color: var(--border); color: var(--fg); }

.thread-actions {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding-left: 38px;
  margin-top: -10px;
}
.ghost-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 6px 10px;
  font-size: 12px; color: var(--fg-2);
  font-weight: 500;
}
.ghost-btn:hover { border-color: var(--border-2); color: var(--fg); }
.ghost-btn.danger { color: oklch(0.5 0.16 25); }
.ghost-btn.full { width: 100%; justify-content: center; padding: 9px; }
.ghost-btn:disabled,
.primary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.primary-btn {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--r-md);
  padding: 7px 14px;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.02em;
}
[data-theme="dark"] .primary-btn { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.primary-btn:hover { opacity: 0.9; }
.primary-btn.full { width: 100%; padding: 11px; font-size: 13px; }

/* CODE BLOCK */
.code-block {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  margin: 8px 0 16px;
  background: var(--bg-deep);
}
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 12px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  font-family: var(--mono); font-size: 11px;
  color: var(--fg-mute);
}
.code-lang { letter-spacing: 0.06em; text-transform: uppercase; }
.code-copy {
  background: none; border: 0;
  font-family: var(--sans); font-size: 11px;
  color: var(--fg-mute); font-weight: 500;
  letter-spacing: 0.04em;
}
.code-copy:hover { color: var(--accent); }
.code-body {
  margin: 0; padding: 12px 0;
  font-family: var(--mono); font-size: 13px; line-height: 1.65;
  overflow-x: auto;
  color: var(--fg-2);
}
.code-line { display: flex; padding: 0 14px 0 8px; }
.code-num {
  display: inline-block;
  width: 24px; text-align: right; padding-right: 12px;
  color: var(--fg-faint);
  user-select: none;
  flex: none;
}
.code-content { white-space: pre; }
.tk-comment { color: var(--fg-mute); font-style: italic; }
.tk-string  { color: oklch(0.55 0.13 80); }
[data-theme="dark"] .tk-string { color: oklch(0.78 0.13 80); }

/* ============== COMPOSER ============== */
.composer-wrap {
  padding: 14px 24px 18px;
  background: linear-gradient(to top, var(--bg) 60%, transparent);
  border-top: 1px solid var(--border);
}
.composer {
  width: min(740px, 100%);
  margin: 0 auto;
  background: var(--bg-elev);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
  transition: border-color .15s;
}
.composer:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint), var(--shadow-md);
}
.comp-input {
  width: 100%;
  background: none; border: 0; outline: 0; resize: none;
  font-family: var(--serif);
  font-size: 16px; line-height: 1.55;
  padding: 14px 16px 8px;
  color: var(--fg);
  min-height: 52px;
  max-height: 220px;
}
.comp-input::placeholder { color: var(--fg-faint); font-style: italic; }
.comp-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 8px 8px;
}
.comp-left, .comp-right { display: flex; align-items: center; gap: 4px; }
.comp-tool {
  display: inline-flex; align-items: center; gap: 5px;
  background: none; border: 1px solid transparent;
  padding: 5px 8px; border-radius: var(--r-sm);
  color: var(--fg-mute);
  font-size: 12px;
}
.comp-tool:hover { background: var(--bg-deep); color: var(--fg); border-color: var(--border); }
.comp-divider { width: 1px; height: 18px; background: var(--border); margin: 0 4px; }
.comp-model-btn { color: var(--fg-2); }
.comp-model-label { font-weight: 500; }
.comp-model { position: relative; }
.comp-hint {
  font-size: 11px; color: var(--fg-faint);
  margin-right: 8px;
}
.comp-hint kbd { font-size: 10px; padding: 0 4px; }
.send-btn {
  width: 32px; height: 32px;
  background: var(--accent); color: var(--paper);
  border: 0; border-radius: var(--r-sm);
  display: inline-flex; align-items: center; justify-content: center;
  transition: opacity .15s, transform .15s;
}
.send-btn:hover:not(:disabled) { transform: translateY(-1px); }
.send-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.send-btn.stop { background: var(--ink); color: var(--paper); }
[data-theme="dark"] .send-btn { color: var(--bg); }

.comp-attachments {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 10px 10px 0;
}
.attachment {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 4px 8px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--fg-2);
}
.attachment button {
  background: none; border: 0; color: var(--fg-faint);
  font-size: 14px; line-height: 1; padding: 0; margin-left: 2px;
}
.attachment button:hover { color: var(--accent); }

.comp-footnote {
  width: min(740px, 100%);
  margin: 8px auto 0;
  font-size: 11px;
  color: var(--fg-faint);
  text-align: center;
  font-family: var(--sans);
}

/* ============== SETTINGS / HISTORY / LOGIN ============== */
.screen { overflow-y: auto; padding: 32px 24px 80px; }
.screen-inner {
  width: min(820px, 100%);
  margin: 0 auto;
}
.screen-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.screen-sub {
  font-family: var(--serif);
  font-size: 16px; color: var(--fg-mute);
  margin: 0 0 28px;
}

.settings-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
}
.settings-nav { display: flex; flex-direction: column; gap: 2px; }
.settings-nav-btn {
  background: none; border: 0;
  text-align: left;
  padding: 8px 10px;
  font-size: 13px; color: var(--fg-2);
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
}
.settings-nav-btn:hover { background: var(--bg-elev); color: var(--fg); }
.settings-nav-btn.active {
  color: var(--fg);
  border-left-color: var(--accent);
  font-weight: 500;
  background: var(--accent-tint);
}
.settings-pane { display: flex; flex-direction: column; gap: 22px; }

.field { display: flex; flex-direction: column; gap: 8px; }
.field-head { display: flex; flex-direction: column; gap: 2px; }
.field-label {
  font-size: 13px; font-weight: 600; color: var(--fg);
}
.field-hint {
  font-size: 12px; color: var(--fg-mute); line-height: 1.5;
}
.field-hint.mono { font-family: var(--mono); font-size: 11px; }
.text-input {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 10px 12px;
  font-size: 14px;
  color: var(--fg);
  outline: 0;
  transition: border-color .15s, box-shadow .15s;
}
.text-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}
.text-input.mono { font-family: var(--mono); font-size: 13px; }
textarea.text-input { resize: vertical; line-height: 1.55; }
.key-row { display: flex; gap: 8px; }
.key-row .text-input { flex: 1; }

.plan-row { display: flex; align-items: center; gap: 12px; }

.radio-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 8px;
}
.radio-card {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 12px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
}
.radio-card:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-tint);
}
.radio-card input { margin-top: 3px; accent-color: var(--accent); }
.radio-card-text { display: flex; flex-direction: column; }
.radio-card-label { font-size: 13px; font-weight: 600; }
.radio-card-sub { font-size: 11px; color: var(--fg-mute); }

.slider {
  width: 100%; accent-color: var(--accent);
}

.seg {
  display: inline-flex; gap: 2px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 2px;
  border-radius: var(--r-md);
}
.seg-btn {
  background: none; border: 0;
  padding: 6px 14px;
  font-size: 12px; font-weight: 500;
  color: var(--fg-mute);
  border-radius: 7px;
}
.seg-btn.on {
  background: var(--bg);
  color: var(--fg);
  box-shadow: var(--shadow-sm);
}

.swatch-row { display: flex; flex-wrap: wrap; gap: 8px; }
.swatch {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 12px; color: var(--fg-2);
}
.swatch.on { border-color: var(--accent); color: var(--fg); }
.swatch-dot {
  width: 14px; height: 14px; border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.1);
}
.swatch[data-accent="terracotta"] .swatch-dot { background: oklch(0.58 0.12 40); }
.swatch[data-accent="forest"]     .swatch-dot { background: oklch(0.58 0.08 150); }
.swatch[data-accent="ink"]        .swatch-dot { background: oklch(0.58 0.08 260); }
.swatch[data-accent="ochre"]      .swatch-dot { background: oklch(0.58 0.13 80); }

/* HISTORY */
.history-search {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 10px 14px;
  margin-bottom: 24px;
}
.history-search svg { color: var(--fg-mute); }
.history-search input {
  flex: 1; background: none; border: 0; outline: 0;
  font-size: 14px; color: var(--fg);
}
.hist-group { margin-bottom: 28px; }
.hist-date {
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 8px;
}
.hist-list {
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg-elev);
}
.hist-item {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 18px;
  background: none; border: 0; border-bottom: 1px solid var(--border);
  text-align: left;
  transition: background .12s;
}
.hist-item:last-child { border-bottom: 0; }
.hist-item:hover { background: var(--bg-deep); }
.hist-title {
  font-family: var(--serif);
  font-size: 16px; color: var(--fg);
}
.hist-preview {
  font-size: 13px; color: var(--fg-mute);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* LOGIN */
.login {
  display: flex; align-items: center; justify-content: center;
  padding: 40px 20px;
}
.login-card {
  width: min(420px, 100%);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: 12px;
}
.login-mark {
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent-tint);
  border-radius: 50%;
  color: var(--accent);
  margin-bottom: 4px;
}
.login-title {
  font-family: var(--serif);
  font-weight: 400; font-size: 26px;
  letter-spacing: -0.01em;
  margin: 0;
}
.login-sub {
  font-family: var(--serif); font-size: 15px;
  color: var(--fg-mute);
  margin: 0 0 8px;
}
.login-divider {
  text-align: center;
  position: relative;
  margin: 8px 0;
  color: var(--fg-faint);
  font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase;
}
.login-divider::before, .login-divider::after {
  content: "";
  position: absolute; top: 50%; width: calc(50% - 18px); height: 1px;
  background: var(--border);
}
.login-divider::before { left: 0; }
.login-divider::after  { right: 0; }
.login-foot {
  font-size: 11px; color: var(--fg-faint);
  text-align: center; margin: 8px 0 0;
}

/* SHORTCUTS */
.overlay {
  position: fixed; inset: 0;
  background: rgba(20, 17, 14, 0.5);
  backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 24px;
}
.shortcuts {
  width: min(640px, 100%);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  padding: 22px 26px;
}
.shortcuts-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.shortcuts-head h3 {
  font-family: var(--serif);
  font-weight: 400; font-size: 20px; margin: 0;
}
.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px 32px;
}
.shortcut-group h4 {
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
  font-weight: 500;
}
.shortcut-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 5px 0;
  font-size: 13px;
  color: var(--fg-2);
}
.kbds { display: inline-flex; gap: 3px; }

/* ============== MOBILE ============== */
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; inset: 0 30% 0 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform .25s ease;
    box-shadow: var(--shadow-lg);
  }
  .app[data-mobile-nav="open"] .sidebar { transform: translateX(0); }
  .app[data-mobile-nav="open"]::after {
    content: "";
    position: fixed; inset: 0;
    background: rgba(20,17,14,0.4);
    z-index: 49;
  }
  .close-mobile { display: inline-flex; }
  .mobile-menu { display: inline-flex; }
  .topbar { padding: 10px 14px; }
  .topbar-title .crumb { display: none; }
  .topbar-title .crumb-sep { display: none; }
  .topbar-title { font-size: 14px; }
  .thread-wrap { padding: 16px 14px 30px; }
  .thread-title { font-size: 20px; }
  .empty { padding: 24px 14px; }
  .composer-wrap {
    padding: 10px 12px calc(14px + env(safe-area-inset-bottom, 0px));
  }
  .comp-input { font-size: 16px; padding: 12px 14px 6px; }
  .comp-hint { display: none; }
  .screen { padding: 22px 16px 80px; }
  .screen-title { font-size: 24px; }
  .settings-layout { grid-template-columns: 1fr; gap: 16px; }
  .settings-nav {
    flex-direction: row; flex-wrap: wrap; gap: 4px;
    padding-bottom: 10px; border-bottom: 1px solid var(--border);
  }
  .settings-nav-btn { border-left: 0; border-bottom: 2px solid transparent; padding: 6px 10px; }
  .settings-nav-btn.active { border-left: 0; border-bottom-color: var(--accent); background: none; }
  .radio-row { grid-template-columns: 1fr; }
  .shortcuts-grid { grid-template-columns: 1fr; }
  .msg { grid-template-columns: 18px 1fr; gap: 10px; }
  .msg-mark { width: 18px; height: 18px; }
  .msg-text, .rich-p, .rich-list { font-size: 15.5px; }
  .thread-actions { padding-left: 28px; }
}