:root {
  --bg: #f6f7f4;
  --panel: #ffffff;
  --panel-2: #f0f2ec;
  --border: #dfe3d8;
  --text: #1d2318;
  --muted: #5f6b57;
  --accent: #2f7d4f;
  --accent-2: #e4f2e8;
  --accent-text: #ffffff;
  --warn: #a15c00;
  --warn-bg: #fff3dc;
  --danger: #b3261e;
  --danger-bg: #fde8e6;
  --code-bg: #eef1ea;
  --shadow: 0 1px 2px rgba(20, 30, 10, 0.06), 0 4px 16px rgba(20, 30, 10, 0.05);
  --radius: 12px;
  --sidebar: 260px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121511;
    --panel: #1a1e18;
    --panel-2: #20251e;
    --border: #2e352b;
    --text: #e6eae1;
    --muted: #9aa592;
    --accent: #5cc184;
    --accent-2: #1d3325;
    --accent-text: #0d1a11;
    --warn: #f0b45a;
    --warn-bg: #3a2c12;
    --danger: #ff8a80;
    --danger-bg: #3d1a17;
    --code-bg: #232922;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
code, pre, kbd { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9em; }

button, .btn {
  display: inline-flex; align-items: center; gap: 6px;
  font: inherit; font-weight: 600; font-size: 0.92rem;
  padding: 8px 14px; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  text-decoration: none;
}
button:hover, .btn:hover { border-color: var(--accent); text-decoration: none; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--danger); }
button.ghost { background: transparent; border-color: transparent; }
button:disabled { opacity: 0.55; cursor: default; }

input, textarea, select {
  font: inherit; color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: 9px; padding: 9px 12px; width: 100%;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
textarea { resize: vertical; min-height: 120px; }
label { display: block; font-weight: 600; font-size: 0.85rem; margin: 0 0 4px; color: var(--muted); }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--panel); border-right: 1px solid var(--border);
  padding: 18px 12px; display: flex; flex-direction: column; gap: 4px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 10px 16px; font-weight: 800; font-size: 1.1rem; color: var(--text); }
.brand img { width: 28px; height: 28px; }
.nav-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); padding: 14px 10px 4px; font-weight: 700; }
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: 8px;
  color: var(--text); font-size: 0.93rem;
}
.nav a:hover { background: var(--panel-2); text-decoration: none; }
.nav a.active { background: var(--accent-2); color: var(--accent); font-weight: 700; }
.nav .count { margin-left: auto; font-size: 0.75rem; color: var(--muted); }
.nav .ico { width: 20px; text-align: center; }
.sidebar .spacer { flex: 1; }

.main { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 12px; padding: 12px 28px;
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.menu-btn { display: none; }
.view { padding: 28px; max-width: 1100px; width: 100%; }

/* ---------- search ---------- */
.search { position: relative; flex: 1; max-width: 680px; }
.search input { padding-left: 38px; border-radius: 999px; background: var(--panel); }
.search .glass { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.suggest {
  position: absolute; left: 0; right: 0; top: calc(100% + 6px);
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; display: none;
}
.suggest.open { display: block; }
.suggest a { display: block; padding: 9px 14px; color: var(--text); border-bottom: 1px solid var(--border); }
.suggest a:last-child { border-bottom: 0; }
.suggest a.sel, .suggest a:hover { background: var(--accent-2); text-decoration: none; }
.suggest .t { font-weight: 600; }
.suggest .s { font-size: 0.82rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.suggest .kind { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); font-weight: 700; margin-right: 6px; }
mark { background: color-mix(in srgb, var(--accent) 25%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }

/* ---------- building blocks ---------- */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: 14px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.pill {
  display: inline-block; font-size: 0.75rem; font-weight: 700; padding: 2px 9px; border-radius: 999px;
  background: var(--panel-2); color: var(--muted); border: 1px solid var(--border);
}
.pill.ready { background: var(--accent-2); color: var(--accent); border-color: transparent; }
.pill.researching { background: var(--warn-bg); color: var(--warn); border-color: transparent; }
.pill.error { background: var(--danger-bg); color: var(--danger); border-color: transparent; }
.tag { font-size: 0.78rem; padding: 2px 8px; border-radius: 6px; background: var(--panel-2); color: var(--muted); }
a.card-link { color: inherit; display: block; }
a.card-link:hover { text-decoration: none; border-color: var(--accent); }
.card-link h3 { margin-bottom: 4px; }
.section-ico { font-size: 1.5rem; }
.page-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; flex-wrap: wrap; margin-bottom: 20px; }
.page-head p { margin: 0; }
.form-grid { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.form-grid .full { grid-column: 1 / -1; }
.error-box { background: var(--danger-bg); color: var(--danger); padding: 10px 14px; border-radius: 9px; }
.empty { text-align: center; padding: 40px 20px; color: var(--muted); }
.list-item { display: block; padding: 14px 16px; border-bottom: 1px solid var(--border); color: inherit; }
.list-item:last-child { border-bottom: 0; }
.list-item:hover { background: var(--panel-2); text-decoration: none; }
.list-item .t { font-weight: 650; }
.list-item .s { font-size: 0.88rem; color: var(--muted); }
.list { padding: 0; overflow: hidden; }

/* ---------- tabs ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin: 18px 0; overflow-x: auto; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 10px 14px; color: var(--muted); }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- markdown ---------- */
.md { overflow-wrap: anywhere; }
.md h2 { margin-top: 1.6em; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.md h3 { margin-top: 1.3em; }
.md pre { position: relative; background: var(--code-bg); padding: 14px 16px; border-radius: 10px; overflow-x: auto; border: 1px solid var(--border); }
.md :not(pre) > code { background: var(--code-bg); padding: 1px 6px; border-radius: 5px; }
.md table { border-collapse: collapse; width: 100%; margin: 1em 0; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; vertical-align: top; }
.md th { background: var(--panel-2); }
.md blockquote { margin: 1em 0; padding: 4px 16px; border-left: 3px solid var(--accent); color: var(--muted); background: var(--panel-2); border-radius: 0 8px 8px 0; }
.md img { max-width: 100%; }
.copy-btn { position: absolute; top: 8px; right: 8px; padding: 3px 9px; font-size: 0.75rem; opacity: 0.75; }
.copy-btn:hover { opacity: 1; }

/* ---------- devices ---------- */
.device-card .mfr { font-size: 0.8rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.progress-log { font-family: ui-monospace, Menlo, monospace; font-size: 0.82rem; background: var(--code-bg); border-radius: 10px; padding: 12px 14px; max-height: 260px; overflow-y: auto; }
.progress-log div { padding: 2px 0; }
.spinner { width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.quick-links { display: flex; flex-wrap: wrap; gap: 8px; }
.quick-links a { font-size: 0.85rem; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.quick-links a:hover { border-color: var(--accent); text-decoration: none; }
.res-group h3 { text-transform: capitalize; margin-top: 18px; }
.res { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.res:last-child { border-bottom: 0; }
.res .domain { font-size: 0.78rem; color: var(--muted); }
.video-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.video-grid a { color: inherit; }
.video-grid img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 10px; border: 1px solid var(--border); background: var(--panel-2); }
.specs { width: 100%; border-collapse: collapse; }
.specs td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.specs td:first-child { font-weight: 600; color: var(--muted); width: 35%; }
.issue { padding: 12px 0; border-bottom: 1px solid var(--border); }
.issue:last-child { border-bottom: 0; }

/* ---------- chat ---------- */
.chat { display: flex; flex-direction: column; height: calc(100vh - 140px); }
.chat-log { flex: 1; overflow-y: auto; padding: 4px 2px 20px; }
.msg { margin: 0 0 16px; max-width: 100%; }
.msg.user .bubble { background: var(--accent); color: var(--accent-text); margin-left: auto; width: fit-content; max-width: 80%; white-space: pre-wrap; }
.msg .bubble { padding: 12px 16px; border-radius: 14px; background: var(--panel); border: 1px solid var(--border); }
.msg.user .bubble { border: 0; }
.msg .meta { font-size: 0.8rem; color: var(--muted); margin-top: 6px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.chat-input { display: flex; gap: 10px; align-items: flex-end; padding-top: 12px; border-top: 1px solid var(--border); }
.chat-input textarea { min-height: 52px; max-height: 200px; }
.status-line { font-size: 0.82rem; color: var(--muted); display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.sources a { font-size: 0.8rem; }
.starter { text-align: left; font-weight: 500; }

/* ---------- ZPL ---------- */
.zpl-wrap { display: grid; gap: 18px; grid-template-columns: 1fr 1fr; }
.zpl-wrap textarea { min-height: 360px; font-family: ui-monospace, Menlo, monospace; font-size: 0.85rem; }
.zpl-out { display: flex; align-items: center; justify-content: center; min-height: 360px; background: repeating-conic-gradient(var(--panel-2) 0% 25%, var(--panel) 0% 50%) 50% / 20px 20px; border-radius: 10px; border: 1px solid var(--border); padding: 14px; }
.zpl-out img { max-width: 100%; max-height: 600px; background: #fff; box-shadow: var(--shadow); }

/* ---------- login ---------- */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; text-align: center; padding: 32px 28px; }
.login-card img { width: 56px; height: 56px; }
.pin-input { font-size: 1.8rem; letter-spacing: 0.5em; text-align: center; padding: 12px; margin: 18px 0 12px; }
.login-card button { width: 100%; justify-content: center; padding: 12px; }
.login-msg { min-height: 1.4em; margin-top: 12px; font-size: 0.9rem; color: var(--danger); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 0; z-index: 50; width: 280px; transform: translateX(-100%); transition: transform 0.2s; box-shadow: var(--shadow); }
  .sidebar.open { transform: none; }
  .menu-btn { display: inline-flex; }
  .topbar { padding: 10px 16px; }
  .view { padding: 18px 16px; }
  .form-grid, .zpl-wrap { grid-template-columns: 1fr; }
  .chat { height: calc(100vh - 110px); }
}

/* ---------- Zebra menu navigator ---------- */
.zb-layout { display: grid; grid-template-columns: minmax(300px, 380px) 1fr; gap: 22px; align-items: start; }
.zb-panel-col { position: sticky; top: 76px; }
.zb-printer {
  background: linear-gradient(180deg, #3a3f45, #24282c); border-radius: 16px; padding: 16px 16px 18px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), var(--shadow); color: #e9edf1; --flash: #ffb627;
}
.zb-brand { font-weight: 900; letter-spacing: .12em; font-size: .85rem; margin-bottom: 12px; color: #fff; }
.zb-brand span { font-weight: 600; letter-spacing: .04em; color: #aab3bc; margin-left: 6px; }
.lcd {
  font-family: ui-monospace, Menlo, Consolas, monospace; background: #a9c26b; color: #1d2a0c;
  border: 3px solid #15181b; border-radius: 6px; padding: 8px 10px; line-height: 1.35; font-size: 15px; font-weight: 700;
  box-shadow: inset 0 0 12px rgba(30,50,0,.35); white-space: pre; overflow: hidden; width: 100%;
  min-height: calc(2 * 1.35em + 16px); letter-spacing: .03em;
}
.lcd.mini { font-size: 12px; padding: 4px 8px; margin-top: 6px; display: inline-block; width: auto; min-width: 180px; border-width: 2px; }
.zb-lights { display: flex; gap: 14px; flex-wrap: wrap; margin: 0 0 12px; font-size: .7rem; letter-spacing: .06em; color: #aab3bc; }
.zb-light { display: flex; align-items: center; gap: 6px; }
.zb-light i { width: 12px; height: 12px; border-radius: 50%; background: #4a4f55; box-shadow: inset 0 1px 2px rgba(0,0,0,.6); transition: background .08s, box-shadow .08s; }
.zb-light.on i { background: var(--flash); box-shadow: 0 0 10px var(--flash); }
.zb-printer.led .zb-light i { width: 18px; height: 18px; }
.zb-buttons { display: grid; gap: 8px; margin-top: 14px; }
.zb-btn {
  justify-content: center; min-height: 40px; padding: 6px 4px; font-size: .78rem; font-weight: 800; letter-spacing: .03em;
  background: linear-gradient(180deg, #5b626a, #43494f); color: #fff; border: 1px solid #1d2125; border-radius: 8px;
  box-shadow: 0 2px 0 #15181b; touch-action: none; user-select: none;
}
.zb-btn.round { border-radius: 50%; aspect-ratio: 1; min-height: 44px; width: 100%; max-width: 84px; justify-self: center; }
.zb-btn:hover { border-color: #8fd3a8; }
.zb-btn.pressed, .zb-btn:active { transform: translateY(2px); box-shadow: none; background: #2f7d4f; }
.zb-btn.hint { outline: 3px solid #ffd54a; outline-offset: 2px; animation: zbpulse 1s ease-in-out infinite; }
@keyframes zbpulse { 50% { outline-color: transparent; } }
.zb-where { margin-top: 14px; }
.zb-count { font-weight: 700; font-size: 1.05rem; }
.zb-success { color: var(--accent); font-weight: 700; }
.zb-dests { max-height: 320px; overflow-y: auto; margin-top: 10px; }
.zb-cat { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 700; padding: 10px 8px 4px; }
.zb-dest { display: block; padding: 6px 8px; border-radius: 7px; color: var(--text); font-size: .93rem; }
.zb-dest:hover { background: var(--panel-2); text-decoration: none; }
.zb-dest.sel { background: var(--accent-2); color: var(--accent); font-weight: 700; }
.zb-steps { padding-left: 22px; margin: 0; }
.zb-steps li { padding: 10px 10px; border-radius: 9px; margin-bottom: 4px; transition: background .15s; }
.zb-steps li.active { background: var(--accent-2); }
.zb-final { list-style: none; margin-left: -22px; border: 1px dashed var(--accent); }
.keycap {
  display: inline-block; min-width: 28px; text-align: center; padding: 1px 7px; margin: 0 2px; border-radius: 6px;
  background: #43494f; color: #fff; font-weight: 800; font-size: .8rem; border: 1px solid #1d2125; box-shadow: 0 2px 0 #15181b;
}
.zb-cmd { margin-top: 14px; }
.zb-cmd pre { background: var(--code-bg); padding: 10px 12px; border-radius: 8px; overflow-x: auto; margin: 4px 0 0; }
button.ghost.active { border-color: var(--accent); color: var(--accent); }
details summary { cursor: pointer; }
@media (max-width: 860px) {
  .zb-layout { grid-template-columns: 1fr; }
  .zb-panel-col { position: static; }
}

/* ---------- Ask The Guru ---------- */
[hidden] { display: none !important; }
.guru { display: flex; flex-direction: column; height: 100%; min-height: 0; width: 100%; }
.guru-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 10px; }
.guru-body { position: relative; flex: 1; min-height: 0; display: flex; }
.guru-body .chat-log { flex: 1; overflow-y: auto; overscroll-behavior: contain; }
.jump-latest {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  border-radius: 999px; box-shadow: var(--shadow); background: var(--panel); font-size: .85rem; padding: 6px 14px;
}
.guru-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 60; border-radius: 999px; padding: 12px 20px;
  background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-size: 1rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .25);
}
.guru-fab:hover { filter: brightness(1.08); }
.guru-pop {
  position: fixed; right: 24px; bottom: 24px; z-index: 60; display: flex;
  width: 440px; height: min(680px, calc(100vh - 48px));
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 14px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .3);
}
.guru.compact .msg .bubble { padding: 10px 12px; font-size: .93rem; }
.guru.compact .msg.user .bubble { max-width: 90%; }
.guru.compact .chat-input textarea { min-height: 44px; }
.guru.compact .empty { padding: 16px 6px; font-size: .9rem; }
.guru.compact .md pre { font-size: .8rem; }
@media (max-width: 860px) { .guru-fab, .guru-pop { display: none !important; } }