/* ============================================================
   DESIGN SAMPLE v2 — "The Cockpit" (skin only, original layout)
   Standalone. Does NOT touch app.css. For approval only.
   ============================================================ */

:root[data-theme="light"] {
  --surface-0:  #FBFBFA;
  --surface-1:  #FFFFFF;
  --surface-2:  #F4F4F2;
  --ink-1:      #1A1B1E;
  --ink-2:      #56585E;
  --ink-3:      #8A8D94;
  --line:       #E8E8E4;
  --line-soft:  #F0F0EC;
  --accent:     #4F46E5;
  --accent-ink: #FFFFFF;
  --accent-soft: color-mix(in srgb, var(--accent) 9%, transparent);
  --live:       #16A34A;
  --shadow-card: 0 1px 2px rgba(20,21,30,.04);
}
:root[data-theme="dark"] {
  --surface-0:  #101114;
  --surface-1:  #16181D;
  --surface-2:  #1D2026;
  --ink-1:      #E8EAEE;
  --ink-2:      #A4A9B4;
  --ink-3:      #6B707B;
  --line:       #262A31;
  --line-soft:  #1E2229;
  --accent:     #6366F1;
  --accent-ink: #FFFFFF;
  --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
  --live:       #34D399;
  --shadow-card: 0 1px 2px rgba(0,0,0,.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --font-sans: "Inter", -apple-system, system-ui, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Menlo", monospace;
}

html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--surface-0);
  color: var(--ink-2);
  -webkit-font-smoothing: antialiased;
  font-size: 14px; line-height: 1.5;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3);
}

#app { display: flex; flex-direction: column; height: 100vh; }

/* ---------- TOP HEADER (original 3-zone layout kept) ---------- */
#top-header {
  height: 52px; display: flex; align-items: center;
  padding: 0 14px; gap: 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-0);
}
#header-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.sidebar-toggle-btn, .theme-toggle-btn {
  width: 32px; height: 32px; border-radius: 7px; border: none;
  background: transparent; color: var(--ink-3); cursor: pointer;
  display: grid; place-items: center; transition: all .14s;
}
.sidebar-toggle-btn:hover, .theme-toggle-btn:hover { background: var(--surface-2); color: var(--ink-1); }
#header-brand { display: flex; align-items: center; gap: 9px; cursor: pointer; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 6px; background: var(--accent);
  display: grid; place-items: center; color: var(--accent-ink);
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
}
.header-logo-divider { width: 1px; height: 16px; background: var(--line); }
#header-logo { font-weight: 650; color: var(--ink-1); font-size: 14.5px; }
.header-owner-badge {
  font-family: var(--font-mono); font-size: 9.5px; font-weight: 600;
  letter-spacing: .1em; padding: 3px 7px; border-radius: 5px;
  background: var(--accent-soft); color: var(--accent); border: none; cursor: pointer;
}

/* ---------- COMMAND BAR (new: fills the empty top center) ---------- */
#header-center { flex: 1; display: flex; justify-content: center; }
.cmdbar {
  display: flex; align-items: center; gap: 9px;
  width: 100%; max-width: 440px; height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--surface-1); color: var(--ink-3);
  cursor: text; transition: border-color .14s;
}
.cmdbar:hover { border-color: var(--accent); }
.cmdbar svg { width: 15px; height: 15px; flex-shrink: 0; }
.cmdbar .ph { flex: 1; font-size: 13px; }
.cmdbar .kbd {
  font-family: var(--font-mono); font-size: 10.5px;
  padding: 2px 6px; border-radius: 5px;
  background: var(--surface-2); color: var(--ink-3);
  border: 1px solid var(--line);
}

/* ---------- right: icons ---------- */
#header-right { display: flex; align-items: center; gap: 12px; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--live) 55%, transparent); }
  60%  { box-shadow: 0 0 0 4px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.header-icons { display: flex; gap: 2px; }
.theme-toggle-btn svg { width: 16px; height: 16px; }

/* ---------- content row + sidebar (original positions) ---------- */
#content-row { flex: 1; display: flex; min-height: 0; }
#sidebar {
  width: 256px; flex-shrink: 0;
  border-right: 1px solid var(--line);
  background: var(--surface-0);
  display: flex; flex-direction: column;
}
#sidebar-list { flex: 1; overflow-y: auto; padding: 8px 10px; }

.sidebar-divider {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 8px 7px;
}
.sidebar-divider > span:first-child {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
  white-space: nowrap;
}
.sidebar-divider::after { content: ""; flex: 1; height: 1px; background: var(--line-soft); }
.sidebar-divider-actions { display: flex; align-items: center; gap: 4px; }

.btn-icon-sm {
  width: 24px; height: 24px; border-radius: 6px; border: none;
  background: transparent; color: var(--ink-3); cursor: pointer;
  display: grid; place-items: center;
}
.btn-icon-sm:hover { background: var(--surface-2); color: var(--ink-1); }

/* split new-session button (kept as original) */
.btn-split-wrap { display: flex; align-items: stretch; }
.btn-split-main {
  height: 26px; padding: 0 10px; border: 1px solid var(--line);
  border-right: none; border-radius: 7px 0 0 7px;
  background: var(--surface-1); color: var(--ink-1); cursor: pointer;
  font-family: var(--font-sans); font-size: 12px; font-weight: 550;
}
.btn-split-main:hover { background: var(--surface-2); }
.btn-split-arrow {
  width: 24px; border: 1px solid var(--line); border-radius: 0 7px 7px 0;
  background: var(--surface-1); color: var(--ink-3); cursor: pointer; font-size: 10px;
}
.btn-split-arrow:hover { background: var(--surface-2); }

.conv-empty { padding: 14px 10px; text-align: center; color: var(--ink-3); font-size: 12.5px; }

/* nav items (Config / My Data / Creator) */
.task-item {
  display: flex; align-items: center;
  padding: 8px 10px; border-radius: 8px; cursor: pointer;
  color: var(--ink-2); transition: background .12s, color .12s;
  position: relative;
}
.task-item:hover { background: var(--surface-2); color: var(--ink-1); }
.task-item.active { background: var(--accent-soft); color: var(--ink-1); }
.task-item.active::before {
  content: ""; position: absolute; left: -10px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 17px; border-radius: 0 3px 3px 0; background: var(--accent);
}
.task-row { display: flex; align-items: center; gap: 11px; }
.task-icon { color: var(--ink-3); flex-shrink: 0; }
.task-item.active .task-icon { color: var(--accent); }
.task-name { font-size: 13.5px; }
.task-item.active .task-name { font-weight: 550; }

/* sidebar footer */
#sidebar-footer { border-top: 1px solid var(--line-soft); padding: 8px 10px; }
.sidebar-nav-row { display: flex; align-items: center; justify-content: space-between; }
.sidebar-nav-btn {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 10px; border-radius: 8px; border: none; cursor: pointer;
  background: transparent; color: var(--ink-2); font-size: 13px; flex: 1;
}
.sidebar-nav-btn:hover { background: var(--surface-2); color: var(--ink-1); }
.sidebar-nav-btn svg { color: var(--ink-3); }
.version-badge { font-family: var(--font-mono); font-size: 10px; color: var(--ink-3); padding-right: 6px; letter-spacing: .03em; }

/* ---------- main / chat empty ---------- */
#main { flex: 1; display: flex; flex-direction: column; background: var(--surface-1); min-width: 0; }
.chat-empty { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 20px; padding: 40px; }
.ce-mark { width: 52px; height: 52px; border-radius: 14px; background: var(--accent-soft); display: grid; place-items: center; }
.ce-mark svg { width: 26px; height: 26px; color: var(--accent); }
.ce-title { font-size: 21px; font-weight: 680; color: var(--ink-1); letter-spacing: -.01em; text-align: center; }
.ce-sub { color: var(--ink-3); font-size: 13.5px; text-align: center; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; max-width: 540px; }
.chip { display: flex; align-items: center; gap: 9px; padding: 11px 15px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface-0); cursor: pointer; transition: border-color .14s, transform .14s; }
.chip:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); transform: translateY(-1px); }
.chip .ci { width: 30px; height: 30px; border-radius: 8px; background: var(--surface-2); display: grid; place-items: center; flex-shrink: 0; }
.chip .ci svg { width: 16px; height: 16px; color: var(--ink-2); }
.chip .ct { font-size: 13px; color: var(--ink-1); font-weight: 550; }
.chip .cd { font-size: 11.5px; color: var(--ink-3); }

.composer { margin: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface-0); display: flex; align-items: flex-end; gap: 8px; box-shadow: var(--shadow-card); }
.composer-wrap { margin: 0 28px 24px; }
.ib-icon {
  width: 32px; height: 32px; border-radius: 8px; border: none; flex-shrink: 0;
  background: transparent; color: var(--ink-3); cursor: pointer;
  display: grid; place-items: center;
}
.ib-icon:hover { background: var(--surface-2); color: var(--ink-1); }
.ib-icon svg { width: 18px; height: 18px; }

/* session info bar — CLI status mirror, kept fully clickable */
#session-info-bar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-3);
  padding: 0 6px 8px;
}
#session-info-bar .sib-sep { opacity: .3; }
#sib-status { display: flex; align-items: center; gap: 6px; color: var(--live); letter-spacing: .06em; }
.sib-clickable { color: var(--ink-2); cursor: pointer; border-radius: 4px; padding: 1px 3px; transition: background .12s, color .12s; }
.sib-clickable:hover { background: var(--surface-2); color: var(--ink-1); }
#sib-cost { color: var(--ink-2); }
.sig-bars { display: inline-flex; align-items: flex-end; gap: 1.5px; height: 9px; vertical-align: -1px; }
.sig-bars i { width: 2.5px; background: var(--live); border-radius: 1px; }
.sig-bars i:nth-child(1){height:3px} .sig-bars i:nth-child(2){height:5px} .sig-bars i:nth-child(3){height:7px} .sig-bars i:nth-child(4){height:9px;background:var(--line);}
.heartbeat {
  width: 6px; height: 6px; border-radius: 50%; background: var(--live);
  animation: pulse 2.4s ease-in-out infinite;
}
.composer:focus-within { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.composer textarea { flex: 1; border: none; background: transparent; resize: none; font-family: var(--font-sans); font-size: 14px; color: var(--ink-1); outline: none; line-height: 1.55; }
.composer .meta { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-3); align-self: center; white-space: nowrap; }
.send { width: 34px; height: 34px; border-radius: 9px; border: none; background: var(--accent); color: var(--accent-ink); cursor: pointer; display: grid; place-items: center; }
.send svg { width: 16px; height: 16px; }

.sample-switch { position: fixed; bottom: 14px; right: 14px; z-index: 99; font-family: var(--font-mono); font-size: 11px; background: var(--surface-1); border: 1px solid var(--line); color: var(--ink-2); padding: 7px 13px; border-radius: 8px; cursor: pointer; }
@media (prefers-reduced-motion: reduce) { .heartbeat { animation: none; } .chip { transition: none; } }