/* ZERO Control Center — design system
   Dark default + light theme. Desktop-first, fully responsive.
   Tokens → primitives → components → states. */

/* ---------- tokens ---------- */
:root {
  --bg: #0C0E0D;
  --bg-raised: #121514;
  --panel: #161A18;
  --panel-2: #1B201E;
  --line: #262C29;
  --line-strong: #333B37;
  --text: #E8E6DF;
  --text-dim: #A8A496;
  --muted: #7C7869;
  --accent: #5FBF7A;
  --accent-ink: #0C0E0D;
  --warn: #C9A227;
  --danger: #D9663B;
  --error: #E14B4B;
  --info: #6FA8DC;
  --radius: 6px;
  --radius-sm: 4px;
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --shadow: 0 1px 3px rgba(0,0,0,.35), 0 8px 24px rgba(0,0,0,.25);
  --topbar-h: 52px;
  --sidebar-w: 232px;
  --context-w: 320px;
}
html[data-theme='light'] {
  --bg: #F4F4F0;
  --bg-raised: #FFFFFF;
  --panel: #FFFFFF;
  --panel-2: #EFEFE9;
  --line: #DDDDD4;
  --line-strong: #C4C4B8;
  --text: #1C1F1D;
  --text-dim: #4E524D;
  --muted: #7C807A;
  --accent: #2E7D4F;
  --accent-ink: #FFFFFF;
  --warn: #8A6D0B;
  --danger: #B03A16;
  --error: #B3261E;
  --info: #2C5FA8;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06);
}

/* ---------- primitives ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font-family: var(--font); font-size: 14px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); font-size: .92em; }
::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

h1 { font-size: 20px; font-weight: 650; letter-spacing: -.01em; }
h2 { font-size: 15px; font-weight: 600; }
.screen-sub { color: var(--muted); font-size: 12.5px; margin-top: 2px; }

/* ---------- app shell ---------- */
.shell { display: grid; height: 100vh; overflow: hidden;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas: "sidebar topbar" "sidebar main"; }
.topbar {
  grid-area: topbar; display: flex; align-items: center; gap: var(--space-4);
  padding: 0 var(--space-4); border-bottom: 1px solid var(--line);
  background: var(--bg-raised);
}
.sidebar {
  grid-area: sidebar; overflow-y: auto; border-right: 1px solid var(--line);
  background: var(--bg-raised); padding: var(--space-3) 0 var(--space-6);
}
.main { grid-area: main; overflow-y: auto; padding: var(--space-5) var(--space-6); scroll-behavior: smooth; }

.brand { display: flex; align-items: center; gap: 10px; padding: 0 var(--space-4);
  height: var(--topbar-h); border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-weight: 700; font-size: 13px; letter-spacing: .04em; }
.brand .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }

/* sidebar nav */
.nav-group { margin-top: var(--space-2); }
.nav-group > button {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  background: none; border: 0; color: var(--muted); cursor: pointer;
  font-family: var(--mono); font-size: 10.5px; text-transform: uppercase;
  letter-spacing: .08em; padding: var(--space-2) var(--space-4);
}
.nav-group > button:hover { color: var(--text); }
.nav-group .chev { transition: transform .15s ease; }
.nav-group.collapsed .chev { transform: rotate(-90deg); }
.nav-group.collapsed .nav-links { display: none; }
.nav-link {
  display: flex; align-items: center; gap: 8px; padding: 6px var(--space-4) 6px var(--space-5);
  color: var(--text-dim); font-size: 13px; border-left: 2px solid transparent;
  cursor: pointer; text-decoration: none;
}
.nav-link:hover { color: var(--text); background: color-mix(in srgb, var(--text) 4%, transparent); text-decoration: none; }
.nav-link.active { color: var(--text); border-left-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent); }
.nav-link .badge { margin-left: auto; }

/* topbar bits */
.tb-item { display: flex; align-items: center; gap: 6px; font-family: var(--mono);
  font-size: 11px; color: var(--muted); white-space: nowrap; }
.tb-spacer { flex: 1; }
.tb-icon {
  background: none; border: 1px solid var(--line); color: var(--text-dim);
  width: 30px; height: 30px; border-radius: var(--radius-sm); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; font-size: 14px;
}
.tb-icon:hover { border-color: var(--line-strong); color: var(--text); }

/* command bar */
.cmdbar { flex: 1; max-width: 640px; position: relative; }
.cmdbar input {
  width: 100%; background: var(--panel); border: 1px solid var(--line);
  color: var(--text); border-radius: var(--radius);
  padding: 7px 12px 7px 30px; font-size: 13px; font-family: var(--font);
}
.cmdbar input:focus { outline: none; border-color: var(--accent); }
.cmdbar .glyph { position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  color: var(--muted); font-family: var(--mono); font-size: 12px; }
.cmdbar .kbd { position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 10px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 3px; padding: 1px 5px; }
.cmd-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; z-index: 50;
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; max-height: 420px; overflow-y: auto;
}
.cmd-item { padding: 9px 14px; cursor: pointer; display: flex; gap: 10px; align-items: baseline; }
.cmd-item:hover, .cmd-item.sel { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.cmd-item .t { font-size: 13px; }
.cmd-item .d { color: var(--muted); font-size: 11.5px; }
.cmd-item .k { margin-left: auto; font-family: var(--mono); font-size: 10px; color: var(--muted); }

/* ---------- components ---------- */
.screen-head { display: flex; align-items: baseline; gap: var(--space-3);
  margin-bottom: var(--space-5); flex-wrap: wrap; }
.grid { display: grid; gap: var(--space-4); }
.grid.c2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.c3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.grid.auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: var(--space-4);
}
.card.clickable { cursor: pointer; transition: border-color .12s ease, transform .12s ease; }
.card.clickable:hover { border-color: var(--line-strong); transform: translateY(-1px); }
.card h3 { font-size: 12px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: .07em; margin-bottom: var(--space-3);
  font-family: var(--mono); }
.card .big { font-size: 26px; font-weight: 650; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums; }
.card .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.statgrid { display: grid; gap: var(--space-3);
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.stat { background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: var(--space-3) var(--space-4); cursor: pointer; }
.stat:hover { border-color: var(--line-strong); }
.stat .k { font-family: var(--mono); font-size: 10px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .07em; }
.stat .v { font-size: 19px; font-weight: 650; margin-top: 2px;
  font-variant-numeric: tabular-nums; }
.stat .v.warn { color: var(--warn); } .stat .v.bad { color: var(--error); }
.stat .v.good { color: var(--accent); }

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .03em;
  padding: 2px 7px; border-radius: 99px; border: 1px solid var(--line-strong);
  color: var(--text-dim); text-transform: uppercase; white-space: nowrap;
}
.badge.good { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 55%, transparent); }
.badge.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 55%, transparent); }
.badge.bad  { color: var(--error); border-color: color-mix(in srgb, var(--error) 55%, transparent); }
.badge.info { color: var(--info); border-color: color-mix(in srgb, var(--info) 55%, transparent); }
.badge .dot2 { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel-2); border: 1px solid var(--line-strong);
  color: var(--text); border-radius: var(--radius-sm);
  padding: 6px 12px; font-size: 12.5px; cursor: pointer; font-family: var(--font);
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 55%, transparent); }
.btn.danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.btn.small { padding: 3px 9px; font-size: 11.5px; }
.btn:disabled { opacity: .45; cursor: default; pointer-events: none; }

input, select, textarea {
  background: var(--bg); border: 1px solid var(--line); color: var(--text);
  border-radius: var(--radius-sm); padding: 7px 10px; font-size: 13px; font-family: var(--font);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
label.f { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--text-dim); }

/* tables */
.tbl-wrap { overflow-x: auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th {
  text-align: left; font-family: var(--mono); font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .07em; color: var(--muted);
  padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
.tbl td { padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover { background: color-mix(in srgb, var(--text) 3%, transparent); }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl .actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* states */
.state { display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 10px; padding: var(--space-7) var(--space-4);
  color: var(--muted); text-align: center; border: 1px dashed var(--line);
  border-radius: var(--radius); font-size: 13px; }
.state .glyph { font-size: 22px; opacity: .7; }
.state.error { color: var(--error); border-color: color-mix(in srgb, var(--error) 40%, transparent); }
.state.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.state .retry-btn { margin-top: 4px; }

.skeleton { position: relative; overflow: hidden; background: var(--panel);
  border-radius: var(--radius-sm); min-height: 14px; }
.skeleton::after { content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--text) 7%, transparent), transparent);
  animation: shimmer 1.4s infinite; }
@keyframes shimmer { from { transform: translateX(-100%);} to { transform: translateX(100%);} }

.progress { height: 4px; background: var(--line); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); border-radius: 99px;
  transition: width .3s ease; }
.progress.warn > div { background: var(--warn); }

/* toast */
.toasts { position: fixed; bottom: 18px; right: 18px; z-index: 200;
  display: flex; flex-direction: column; gap: 8px; max-width: 380px; }
.toast { background: var(--panel); border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent); border-radius: var(--radius);
  padding: 10px 14px; font-size: 13px; box-shadow: var(--shadow); }
.toast.error { border-left-color: var(--error); }
.toast.warn { border-left-color: var(--warn); }
.toast .t-title { font-weight: 600; font-size: 12.5px; }
.toast .t-body { color: var(--text-dim); font-size: 12px; margin-top: 2px;
  word-break: break-word; }

/* modal */
.modal-veil { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: var(--space-4); }
.modal { background: var(--panel); border: 1px solid var(--line-strong);
  border-radius: var(--radius); box-shadow: var(--shadow);
  width: min(680px, 100%); max-height: 86vh; display: flex; flex-direction: column; }
.modal header { display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--line); }
.modal .m-body { padding: var(--space-4); overflow-y: auto; }
.modal footer { padding: var(--space-3) var(--space-4); border-top: 1px solid var(--line);
  display: flex; justify-content: flex-end; gap: 8px; }

/* kv list */
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 5px 14px; font-size: 13px; }
.kv .k { color: var(--muted); font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: .05em; padding-top: 2px; }
.kv .v { word-break: break-word; }

/* timeline */
.timeline { border-left: 2px solid var(--line); margin-left: 6px; padding-left: 16px;
  display: flex; flex-direction: column; gap: 12px; }
.timeline .tl-item { position: relative; }
.timeline .tl-item::before { content: ""; position: absolute; left: -21.5px; top: 5px;
  width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.timeline .tl-item.good::before { background: var(--accent); }
.timeline .tl-item.bad::before { background: var(--error); }
.timeline .tl-item.warn::before { background: var(--warn); }
.tl-item .tl-time { font-family: var(--mono); font-size: 10px; color: var(--muted); }
.tl-item .tl-text { font-size: 13px; margin-top: 1px; }

/* chat (command center) */
.chat-panel { background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); margin-bottom: var(--space-5); overflow: hidden; }
.chat-panel .chat-header { display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .07em; color: var(--muted); }
.chat-messages { height: 320px; overflow-y: auto; padding: 14px 16px;
  display: flex; flex-direction: column; gap: 10px; scroll-behavior: smooth; }
.chat-msg { max-width: 82%; padding: 9px 13px; border-radius: var(--radius);
  font-size: 13.5px; line-height: 1.5; white-space: pre-wrap; word-break: break-word; }
.chat-msg .chat-role { font-family: var(--mono); font-size: 9px;
  display: block; margin-bottom: 3px; text-transform: uppercase;
  letter-spacing: .08em; opacity: .65; }
.chat-msg .chat-time { font-family: var(--mono); font-size: 9px;
  color: var(--muted); margin-left: 6px; opacity: .5; }
.chat-msg.owner { align-self: flex-end;
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.chat-msg.owner .chat-role { color: var(--accent); }
.chat-msg.zero { align-self: flex-start;
  background: var(--bg); border: 1px solid var(--line); }
.chat-msg.zero .chat-role { color: var(--info); }
.chat-msg.system { align-self: center; text-align: center;
  background: color-mix(in srgb, var(--warn) 10%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  font-size: 12.5px; max-width: 90%; }
.chat-msg.system .chat-role { color: var(--warn); }
.chat-msg.chat-error { align-self: center;
  background: color-mix(in srgb, var(--error) 10%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--error) 30%, transparent);
  color: var(--error); font-size: 12.5px; }
.chat-links { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.chat-link-chip { display: inline-flex; align-items: center; gap: 3px;
  font-family: var(--mono); font-size: 10px; padding: 2px 8px;
  border-radius: 99px; border: 1px solid var(--line-strong);
  color: var(--info); cursor: pointer; background: var(--bg); }
.chat-link-chip:hover { border-color: var(--info); background: color-mix(in srgb, var(--info) 8%, var(--bg)); }
.chat-input-area { display: flex; gap: 8px; padding: 10px 16px;
  border-top: 1px solid var(--line); align-items: flex-end; }
.chat-input-area textarea { flex: 1; resize: none; min-height: 40px;
  max-height: 100px; border-radius: var(--radius); font-size: 14px;
  padding: 9px 12px; line-height: 1.4; overflow-y: auto; }
.chat-input-area textarea:focus { outline: none; border-color: var(--accent); }
.chat-input-area .chat-send {
  background: var(--accent); color: var(--accent-ink); border: none;
  padding: 9px 18px; border-radius: var(--radius); font-weight: 600;
  font-size: 13px; cursor: pointer; white-space: nowrap; min-height: 40px; }
.chat-input-area .chat-send:hover { filter: brightness(1.08); }
.chat-input-area .chat-send:disabled { opacity: .45; cursor: default; }
.chat-thinking { display: flex; gap: 4px; align-items: center;
  padding: 8px 0; color: var(--muted); font-size: 12px;
  font-family: var(--mono); }
.chat-thinking .dot3 { animation: chatBlink 1.2s infinite; }
.chat-thinking .dot3:nth-child(2) { animation-delay: .2s; }
.chat-thinking .dot3:nth-child(3) { animation-delay: .4s; }
@keyframes chatBlink { 0%, 80%, 100% { opacity: .2; } 40% { opacity: 1; } }

/* mobile: chat input sticky at bottom of the panel */
@media (max-width: 640px) {
  .chat-messages { height: 260px; }
  .chat-input-area { position: sticky; bottom: 0; background: var(--panel); }
}

/* existing msg styles (kept for chat history compatibility) */
.chatlog { display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 82%; padding: 10px 14px; border-radius: var(--radius);
  font-size: 13.5px; line-height: 1.55; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.msg.master { align-self: flex-start; background: var(--panel); border: 1px solid var(--line); }
.msg .role-tag { font-family: var(--mono); font-size: 9.5px; color: var(--muted);
  display: block; margin-bottom: 3px; text-transform: uppercase; letter-spacing: .06em; }

/* ---------- responsive ---------- */
.sidebar-toggle { display: none; }
@media (max-width: 1100px) {
  .grid.c4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .grid.c3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; grid-template-areas: "topbar" "main"; }
  .sidebar { position: fixed; z-index: 90; top: var(--topbar-h); bottom: 0; left: 0;
    width: var(--sidebar-w); transform: translateX(-100%); transition: transform .18s ease;
    box-shadow: var(--shadow); }
  .sidebar.open { transform: none; }
  .sidebar-toggle { display: inline-flex; }
  .cmdbar .kbd { display: none; }
}
@media (max-width: 640px) {
  .main { padding: var(--space-4) var(--space-3); }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 110px 1fr; }
  .hide-sm { display: none !important; }
}