/* Light theme aligned to KDE Breeze chrome (#EFF0F1 window decorations). */
:root {
  color-scheme: light dark;
  --chrome: #eff0f1;
  --bg: #eff0f1;
  --panel: #fafbfc;
  --panel-2: #e6e8ea;
  --line: #d4d6d8;
  --fg: #232629;
  --muted: #64686d;
  --accent: #2f8f6b;
  --accent-ink: #f4fffa;
  --danger: #b54b4b;
  --user: #e4e6e8;
  --tool: transparent;
  --system: transparent;
  --gate-a: #e4ebf2;
  --gate-b: #e2ebe6;
  --live-warn: #8a6a1a;
  --live-warn-line: #d9c48a;
  --font-ui: "Segoe UI", "Helvetica Neue", sans-serif;
  --font-brand: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 10px;
  --sidebar: 336px; /* ~40% wider than 240px */
  --col: 48rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --chrome: #1b1e24;
    --bg: #1b1e24;
    --panel: #151821;
    --panel-2: #1a1f2b;
    --line: #2a3142;
    --fg: #e7eaf0;
    --muted: #8b93a7;
    --accent: #6fbf9a;
    --accent-ink: #0c1a14;
    --danger: #d98989;
    --user: #1e2433;
    --tool: transparent;
    --system: transparent;
    --gate-a: #1a2433;
    --gate-b: #16221c;
    --live-warn: #e0c07a;
    --live-warn-line: #5a4d2e;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
}

[hidden] { display: none !important; }

.brand {
  margin: 0;
  font-family: var(--font-brand);
  font-size: 1.55rem;
  letter-spacing: 0.01em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
}
.brand-mark {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  display: block;
}
.gate-card .brand-mark {
  width: 2.25rem;
  height: 2.25rem;
}
.brand-sidebar {
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  width: 100%;
}
.brand-sidebar .brand-mark {
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  max-height: none;
}
.brand-sidebar .brand-name {
  font-size: 1.45rem;
  line-height: 1.1;
}

/* —— Gate overlay: one scroll surface (no nested card scroll) —— */
.gate {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: block;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.5rem;
  background:
    radial-gradient(900px 420px at 20% -10%, var(--gate-a) 0%, transparent 55%),
    radial-gradient(700px 380px at 100% 10%, var(--gate-b) 0%, transparent 50%),
    var(--bg);
}
.gate-card {
  width: min(26rem, 100%);
  margin: 0 auto 2rem;
  display: grid;
  gap: 0.85rem;
  padding: 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  overflow: visible;
}
.gate-card.gate-wide { width: min(36rem, 100%); }
.settings-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  margin: 0.15rem 0 0.25rem;
}
.settings-tab {
  flex: 1;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  font-weight: 600;
  padding: 0.55rem 0.4rem 0.65rem;
  margin-bottom: -1px;
}
.settings-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.settings-pane { display: grid; gap: 0.85rem; }
.settings-lead {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}
.settings-lead code,
.hint code,
.choice-desc code {
  font-size: 0.84em;
  padding: 0.05em 0.3em;
  border-radius: 4px;
  background: color-mix(in srgb, var(--panel-2) 80%, var(--line));
}
.settings-section-title {
  margin: 0.35rem 0 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.choice-stack {
  display: grid;
  gap: 0.5rem;
}
.choice-card {
  display: grid;
  gap: 0.2rem;
  text-align: left;
  padding: 0.75rem 0.85rem;
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-weight: 600;
}
.choice-card .choice-desc {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.35;
}
.choice-card.active {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 35%, transparent);
}
.choice-card.active .choice-desc { color: color-mix(in srgb, var(--fg) 55%, var(--muted)); }
.gate-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}
.gate-actions button { flex: 1 1 auto; }
label.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg);
}
label.check input { width: auto; }
select {
  width: 100%;
  max-width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--fg);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}
.gate-copy { margin: 0; }
.gate-copy.muted, .meta, .hint { color: var(--muted); }
.hint { margin: 0; font-size: 0.85rem; }
.gate-err { color: var(--danger); margin: 0; font-size: 0.9rem; }

.choice-row { display: none; } /* replaced by .choice-stack cards */
.choice { display: none; }

label { display: grid; gap: 0.35rem; font-size: 0.85rem; color: var(--muted); }
input, textarea {
  width: 100%;
  max-width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--fg);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  resize: none;
}
input:focus, textarea:focus {
  outline: 1px solid color-mix(in srgb, var(--accent) 55%, var(--line));
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

button {
  border: 0;
  border-radius: 8px;
  padding: 0.55rem 0.95rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: var(--accent-ink);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}
button.ghost.danger { color: var(--danger); }
button.wide { width: 100%; max-width: 100%; }

/* —— App shell: chrome + paper sheet —— */
.app {
  min-height: 100vh;
  background: var(--chrome);
}
.shell {
  display: grid;
  grid-template-columns: minmax(0, var(--sidebar)) minmax(0, 1fr);
  align-items: start;
  min-height: 100vh;
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  min-width: 0;
  width: 100%;
  max-width: var(--sidebar);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 0.9rem;
  border-right: 0;
  background: var(--chrome);
  overflow-x: clip;
}
.sidebar-top {
  display: grid;
  gap: 0.35rem;
  padding: 0.25rem 0.2rem;
  min-width: 0;
}
.sidebar-foot {
  margin-top: auto;
  padding-top: 0.75rem;
  min-width: 0;
  display: grid;
  gap: 0.4rem;
}

.main {
  --paper-edge: color-mix(in srgb, var(--line) 70%, var(--chrome));
  --paper-top: 3.25rem; /* chrome gap above the paper sheet */
  min-width: 0;
  margin: var(--paper-top) 0.65rem 0 0;
  padding: 1.25rem 0 2rem;
  background: var(--panel);
  min-height: calc(100vh - var(--paper-top));
  border-top: 1px solid var(--paper-edge);
  border-right: 1px solid var(--paper-edge);
  border-left: 1px solid var(--paper-edge);
  box-sizing: border-box;
}
.column {
  width: min(var(--col), calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  gap: 0.85rem;
}

.block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 0.15rem 0.6rem 0.65rem;
  min-width: 0;
  max-width: 100%;
}
.block > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.65rem 0.15rem;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  user-select: none;
}
.block > summary::-webkit-details-marker { display: none; }
.block > summary::before {
  content: "▸ ";
  color: var(--accent);
}
.block[open] > summary::before { content: "▾ "; }
.block-body {
  margin: 0;
  padding: 0.25rem 0.15rem 0.35rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.9rem;
}
.block-body.mono, .mono { font-family: var(--font-mono); font-size: 0.82rem; }

.chapters-block {
  flex: 0 0 auto;
  min-width: 0;
}
.chapters {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}
.chapter {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-align: left;
  background: transparent;
  color: var(--fg);
  border: 1px solid transparent;
  padding: 0.5rem 0.45rem;
  font-weight: 500;
  font-size: 0.88rem;
  overflow-wrap: anywhere;
  white-space: normal;
  line-height: 1.3;
}
.chapter:hover { background: var(--panel-2); }
.chapter.active { border-color: var(--line); background: var(--panel-2); }
.chapter .status {
  display: inline-block;
  margin: 0.2rem 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.4rem;
}
.chapter .status.memory.raw { border-style: dashed; }
.chapter.empty {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 400;
  cursor: default;
  border: 0;
  background: transparent;
}

.state {
  justify-self: start;
  max-width: 100%;
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
}
.state.running { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.state.awaiting_approval { color: var(--live-warn); border-color: var(--live-warn-line); }

.thread { display: grid; gap: 0.85rem; }

.chapter-overview {
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  padding: 1.1rem 0 0.4rem;
  display: grid;
  gap: 0.55rem;
  min-width: 0;
}
.chapter-overview:first-child { border-top: 0; padding-top: 0.2rem; }
.chapter-overview-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  min-width: 0;
}
.chapter-overview-title {
  background: transparent;
  color: var(--fg);
  border: 0;
  padding: 0;
  font-family: var(--font-brand);
  font-size: 1.15rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  overflow-wrap: anywhere;
}
.chapter-overview-title:hover { color: var(--accent); }
.chapter-overview-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  flex: 0 0 auto;
}
.chapter-overview-head .status,
.chapter .status {
  flex: 0 0 auto;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.15rem 0.45rem;
}
.chapter .status.memory.raw,
.chapter-overview-head .status.memory {
  border-style: dashed;
}
.chapter-overview-summary,
.chapter-overview-intro,
.chapter-overview-conclusion {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.chapter-overview-intro {
  font-style: italic;
}
.chapter-overview-conclusion {
  border-top: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  padding-top: 0.45rem;
  margin-top: 0.35rem;
}
.chapter-fold {
  border: 0;
  border-radius: 0;
  padding: 0.05rem 0 0.25rem;
  background: transparent;
}
.chapter-fold > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.45rem 0.1rem;
  color: var(--muted);
  font-size: 0.8rem;
  user-select: none;
}
.chapter-fold > summary::-webkit-details-marker { display: none; }
.chapter-fold > summary::before {
  content: "▸ ";
  color: var(--accent);
}
.chapter-fold[open] > summary::before { content: "▾ "; }
.chapter-fold-body {
  display: grid;
  gap: 0.65rem;
  padding-bottom: 0.25rem;
}

.msg {
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
}
.chapter-overview > .msg,
.chapter-fold-body > .msg {
  background: transparent;
}
.msg.user {
  background: var(--user);
  border: 1px solid var(--line);
}
.msg.assistant {
  padding: 0.15rem 0.2rem;
  background: transparent;
}
.msg.system {
  background: transparent;
  border: 0;
  color: var(--muted);
  font-size: 0.88rem;
  padding: 0.2rem 0.15rem;
  font-style: italic;
}
.msg .who {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 0.35rem;
}
.msg .body {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.tool-line {
  min-width: 0;
  border: 0;
  background: transparent;
  padding: 0.1rem 0;
}
.tool-line > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.55rem;
  padding: 0.2rem 0;
  color: var(--muted);
  font-size: 0.84rem;
  user-select: none;
}
.tool-line > summary::-webkit-details-marker { display: none; }
.tool-line > summary::before {
  content: "▸";
  color: var(--accent);
  flex: 0 0 auto;
}
.tool-line[open] > summary::before { content: "▾"; }
.tool-line-ran {
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.7rem;
}
.tool-line-name { color: var(--fg); font-weight: 500; }
.tool-line-cmd {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}
.tool-line .tool-card {
  margin-top: 0.35rem;
}

.tool-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tool);
  padding: 0.55rem 0.75rem 0.65rem;
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}
.tool-card .tool-head {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--fg);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.tool-card .tool-name {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.tool-card details {
  border-top: 1px solid var(--line);
  padding-top: 0.35rem;
  min-width: 0;
}
.tool-card summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.78rem;
  list-style: none;
}
.tool-card summary::-webkit-details-marker { display: none; }
.tool-card summary::before { content: "▸ "; color: var(--accent); }
.tool-card details[open] > summary::before { content: "▾ "; }
.tool-card .tool-body {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--muted);
}

.approval {
  position: sticky;
  bottom: 5.5rem;
  z-index: 2;
  padding: 0.85rem 1rem;
  border: 1px solid var(--live-warn-line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 88%, var(--live-warn) 12%);
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}
.approval-label {
  margin: 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--live-warn);
}
.approval-reason {
  margin: 0;
  font-size: 0.92rem;
  overflow-wrap: anywhere;
}
.approval-cmd,
.approval-preview {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--fg);
  background: var(--bg);
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  max-height: 14rem;
  overflow: auto;
}
.approval-preview { color: var(--muted); max-height: 10rem; }
.approval-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.composer {
  position: sticky;
  bottom: 0.75rem;
  padding: 0.65rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  background: color-mix(in srgb, var(--chrome) 88%, var(--panel));
  backdrop-filter: blur(8px);
  display: grid;
  gap: 0.5rem;
}
.composer textarea {
  border: 0;
  background: transparent;
  padding: 0.35rem 0.4rem;
  max-height: none;
}
.composer textarea:focus { outline: none; }
.composer-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
  flex-wrap: wrap;
}
#voice.recording {
  border-color: var(--danger);
  color: var(--danger);
}

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    max-width: none;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow-x: visible;
  }
}