/* ============================================================
   LabHit init — interactive setup & troubleshooting
   Theme-driven via CSS custom properties (dark default, light "Dawn")
   ============================================================ */

/* ---------- THEME TOKENS ---------- */
:root,
html[data-theme="dark"] {
  --bg: #0e0c14;
  --surface: #12101a;
  --surface-2: #161422;
  --elevated: #1b1828;
  --text: #e0e6ed;
  --text-strong: #ffffff;
  --muted: #9da5ae;
  --faint: #6f7681;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --amber: #e08a3c;
  --purple: #a855f7;
  --green: #3fb950;
  --blue: #4f8ef7;
  --amber-soft: rgba(224, 138, 60, 0.12);
  --purple-soft: rgba(168, 85, 247, 0.12);
  --green-soft: rgba(63, 185, 80, 0.12);
  --blue-soft: rgba(79, 142, 247, 0.12);
  --chip: rgba(255, 255, 255, 0.05);
  --chip-hover: rgba(255, 255, 255, 0.1);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --nav-bg: rgba(14, 12, 20, 0.85);
  --grad: linear-gradient(135deg, #e08a3c, #a855f7);
}

html[data-theme="light"] {
  --bg: #f6f3f0;
  --surface: #efe9f4;
  --surface-2: #ece5f3;
  --elevated: #f3eef8;
  --text: #2c2833;
  --text-strong: #161020;
  --muted: #5e5870;
  --faint: #837c93;
  --border: rgba(28, 20, 40, 0.1);
  --border-strong: rgba(28, 20, 40, 0.16);
  --amber: #c2701f;
  --purple: #8b3fd6;
  --green: #2f9e42;
  --blue: #2f6fe0;
  --amber-soft: rgba(194, 112, 31, 0.12);
  --purple-soft: rgba(139, 63, 214, 0.1);
  --green-soft: rgba(47, 158, 66, 0.12);
  --blue-soft: rgba(47, 111, 224, 0.1);
  --chip: rgba(28, 20, 40, 0.04);
  --chip-hover: rgba(28, 20, 40, 0.08);
  --shadow: 0 18px 50px rgba(28, 20, 40, 0.12);
  --nav-bg: rgba(252, 250, 255, 0.82);
  --grad: linear-gradient(135deg, #e08a3c, #a855f7);
}

/* ---------- RESET / BASE ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .45s ease, color .45s ease;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
code, kbd {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 13px;
}
::selection { background: rgba(168, 85, 247, 0.3); color: var(--text-strong); }

/* ---------- LAYOUT HELPERS ---------- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase; color: var(--muted);
  padding: 5px 14px; border-radius: 20px;
  background: var(--chip); border: 1px solid var(--border);
}
.section-head { margin-bottom: 28px; }
.section-head h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800; letter-spacing: -0.02em;
  color: var(--text-strong); margin: 16px 0 8px;
}
.section-head p { color: var(--muted); max-width: 640px; font-size: 15px; }
.accent-amber { color: var(--amber); }
.accent-purple { color: var(--purple); }
.accent-green { color: var(--green); }
.accent-blue { color: var(--blue); }

/* ---------- NAVBAR ---------- */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background-color .45s ease, border-color .45s ease;
}
.navbar-inner {
  max-width: 1080px; margin: 0 auto;
  padding: 0 24px; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px; font-weight: 700; color: var(--text-strong);
}
.nav-logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #fff;
  box-shadow: 0 4px 14px rgba(168, 85, 247, 0.3);
}
.nav-brand small {
  font-size: 11px; font-weight: 600; color: var(--muted);
  padding: 2px 7px; border-radius: 6px;
  background: var(--chip); border: 1px solid var(--border);
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-link {
  font-size: 14px; color: var(--muted);
  padding: 7px 12px; border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav-link:hover { color: var(--text); background: var(--chip); }
.nav-link.active { color: var(--text-strong); background: var(--chip-hover); }
.nav-side { display: flex; align-items: center; gap: 8px; }
.nav-gh {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 8px;
  background: var(--chip); border: 1px solid var(--border);
  font-size: 13px; font-weight: 500; color: var(--text);
  transition: background .2s, border-color .2s;
}
.nav-gh:hover { background: var(--chip-hover); border-color: var(--border-strong); }
.nav-gh svg { width: 16px; height: 16px; fill: currentColor; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--chip); border: 1px solid var(--border);
  color: var(--text);
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.theme-toggle:hover { transform: translateY(-1px); background: var(--chip-hover); }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .ic-moon { display: none; }
html[data-theme="light"] .theme-toggle .ic-sun { display: none; }
html[data-theme="light"] .theme-toggle .ic-moon { display: inline; }

.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 6px;
}
.nav-hamburger span {
  width: 22px; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform .25s, opacity .25s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; flex-direction: column;
  background: var(--nav-bg);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 56px; z-index: 99;
  padding: 8px 24px 16px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a, .mobile-menu .m-toggle {
  padding: 12px 4px; font-size: 15px; color: var(--text);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
  background: none; border-left: none; border-right: none; border-top: none;
  text-align: left;
}
.mobile-menu .m-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.mobile-menu .m-toggle .ic-moon { display: none; }
html[data-theme="light"] .mobile-menu .m-toggle .ic-sun { display: none; }
html[data-theme="light"] .mobile-menu .m-toggle .ic-moon { display: inline; }

/* ---------- VIEW ROUTING ---------- */
.view { display: none; }
.view.active { display: block; animation: viewIn .4s ease both; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.section { padding: 56px 0; }
.section + .section { border-top: 1px solid var(--border); }

/* ---------- HERO / HOME ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(64px, 10vw, 110px) 24px clamp(48px, 7vw, 80px);
  text-align: center;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse at 25% 30%, rgba(224,138,60,0.16) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 30%, rgba(168,85,247,0.14) 0%, transparent 55%),
    radial-gradient(circle at 50% 40%, rgba(200,110,170,0.08) 0%, transparent 45%),
    var(--bg);
}
html[data-theme="light"] .hero-bg {
  background:
    radial-gradient(ellipse at 25% 30%, rgba(224,138,60,0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 30%, rgba(168,85,247,0.14) 0%, transparent 55%),
    var(--bg);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at center, black 12%, transparent 62%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 12%, transparent 62%);
}
html[data-theme="light"] .hero-grid { background-image: radial-gradient(circle, rgba(28,20,40,0.06) 1px, transparent 1px); }
.hero-accent {
  position: absolute; top: 0; left: 0; right: 0; height: 3px; z-index: 1;
  background: linear-gradient(90deg, #e08a3c, #a855f7, #e08a3c);
  background-size: 200% 100%;
  animation: accent-shift 8s ease-in-out infinite;
}
@keyframes accent-shift {
  0%, 100% { background-position: 0% 0; }
  50% { background-position: 100% 0; }
}
.hero-inner {
  position: relative; z-index: 2;
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 64px); align-items: center; text-align: left;
}
.hero-copy { min-width: 0; }
.hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.12;
  color: var(--text-strong);
  margin: 20px 0 16px;
}
.hero h1 .grad-text {
  background: linear-gradient(120deg, #e08a3c, #a855f7);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero p {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--muted); line-height: 1.7;
  max-width: 540px; margin: 0 0 28px;
}
.hero p strong { color: var(--text); font-weight: 600; }
.hero-cta { display: flex; gap: 12px; justify-content: flex-start; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px;
  font-size: 14px; font-weight: 600;
  border: 1px solid var(--border); background: var(--chip);
  color: var(--text);
  transition: transform .18s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: var(--grad); border-color: transparent; color: #fff;
  box-shadow: 0 8px 24px rgba(168, 85, 247, 0.28);
}
.btn-primary:hover { box-shadow: 0 12px 30px rgba(168, 85, 247, 0.4); }
.btn-ghost:hover { background: var(--chip-hover); border-color: var(--border-strong); }
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -130%;
  width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.38), transparent);
  transform: skewX(-18deg); transition: left .6s ease; pointer-events: none;
}
.btn-primary:hover::after { left: 150%; }

/* hero trust row */
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 26px; }
.hero-meta-item { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--faint); }
.hero-meta-item + .hero-meta-item { padding-left: 16px; border-left: 1px solid var(--border); }
.hm-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }

/* hero ambient orbs */
.hero-orb { position: absolute; z-index: 0; border-radius: 50%; filter: blur(64px); opacity: .5; pointer-events: none; }
.hero-orb-a { width: 340px; height: 340px; top: -70px; left: -50px; background: radial-gradient(circle, rgba(224,138,60,0.5), transparent 70%); animation: orbDrift 18s ease-in-out infinite; }
.hero-orb-b { width: 420px; height: 420px; bottom: -150px; right: -70px; background: radial-gradient(circle, rgba(168,85,247,0.45), transparent 70%); animation: orbDrift 23s ease-in-out infinite reverse; }
html[data-theme="light"] .hero-orb { opacity: .42; }
@keyframes orbDrift { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(28px, -24px); } }

/* hero artifact (faux pipeline run) */
.hero-art { position: relative; z-index: 2; }
.art-glow { position: absolute; inset: 6px; border-radius: 16px; background: var(--grad); filter: blur(30px); opacity: .2; z-index: 0; animation: artGlow 6s ease-in-out infinite; }
@keyframes artGlow { 0%, 100% { opacity: .14; } 50% { opacity: .3; } }
.art-card {
  position: relative; z-index: 1;
  background: #0b0a10; border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 28px 64px rgba(0,0,0,0.5);
}
html[data-theme="light"] .art-card { box-shadow: 0 28px 60px rgba(28,20,40,0.22); }
.art-bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; background: linear-gradient(180deg, #1a1824, #15131d); border-bottom: 1px solid rgba(255,255,255,0.07); }
.art-dot { width: 11px; height: 11px; border-radius: 50%; }
.art-dot.r { background: #ff5f56; } .art-dot.y { background: #ffbd2e; } .art-dot.g { background: #27c93f; }
.art-title { margin-left: 8px; font-family: "SF Mono","Fira Code",monospace; font-size: 12px; color: #8b8f99; }
.art-body { padding: 18px 18px 20px; font-family: "SF Mono","Fira Code","Cascadia Code",monospace; font-size: 13px; line-height: 1.7; }
.art-line { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.art-cmd { color: #e6edf3; }
.art-prompt { color: #3fb950; margin-right: 8px; }
.art-run { color: #e08a3c; margin: 2px 0 10px; }
.art-stage { display: flex; align-items: center; gap: 10px; padding: 3px 0; }
.art-tick { width: 16px; height: 16px; border-radius: 50%; background: var(--green); position: relative; flex-shrink: 0; }
.art-tick::after { content: ""; position: absolute; left: 5px; top: 3px; width: 4px; height: 7px; border: solid #07120b; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.art-tick.gate { background: var(--purple); }
.art-tick.gate::after { border-color: #120a1d; }
.art-name { color: #d6dde4; flex: 1; }
.art-time { color: #6f7681; font-size: 12px; }
.art-ok { color: #3fb950; margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.07); }

/* tool cards */
.tools-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin-top: 8px;
}
.tool-card {
  position: relative; overflow: hidden;
  display: block; text-align: left;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px;
  transition: transform .22s ease, border-color .2s ease, background .2s ease, box-shadow .25s ease;
}
.tool-card::after {
  content: ""; position: absolute; inset: 0; border-radius: 14px; padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .25s ease; pointer-events: none;
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--surface-2); box-shadow: 0 18px 44px rgba(0,0,0,0.32); }
html[data-theme="light"] .tool-card:hover { box-shadow: 0 18px 40px rgba(28,20,40,0.14); }
.tool-card:hover::after { opacity: .55; }
.tool-card .tc-top { position: absolute; top: 0; left: 0; right: 0; height: 3px; opacity: .85; z-index: 1; }
.tc-a .tc-top { background: var(--amber); }
.tc-p .tc-top { background: var(--purple); }
.tc-g .tc-top { background: var(--green); }
.tc-b .tc-top { background: var(--blue); }
.tool-icon {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px; font-size: 20px;
  transition: transform .25s ease;
}
.tool-card:hover .tool-icon { transform: scale(1.08) rotate(-3deg); }
.tc-a .tool-icon { background: var(--amber-soft); color: var(--amber); }
.tc-p .tool-icon { background: var(--purple-soft); color: var(--purple); }
.tc-g .tool-icon { background: var(--green-soft); color: var(--green); }
.tc-b .tool-icon { background: var(--blue-soft); color: var(--blue); }
.tool-card h3 { font-size: 16px; font-weight: 700; color: var(--text-strong); margin-bottom: 6px; }
.tool-card p { font-size: 13.5px; color: var(--muted); line-height: 1.55; }
.tool-card .tc-go { margin-top: 14px; font-size: 13px; font-weight: 600; color: var(--text); display: inline-flex; align-items: center; gap: 6px; }
.tool-card:hover .tc-go { gap: 9px; }

/* quick facts strip */
.facts { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin-top: 36px; }
.fact {
  position: relative; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.fact::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad); opacity: 0; transition: opacity .25s ease; }
.fact:hover { transform: translateY(-2px); border-color: var(--border-strong); background: var(--surface-2); }
.fact:hover::before { opacity: .85; }
.fact b { display: block; font-size: 14px; color: var(--text-strong); margin-bottom: 3px; }
.fact span { font-size: 12.5px; color: var(--muted); }

/* ---------- SEGMENTED CONTROL (env picker) ---------- */
.seg {
  display: inline-flex; flex-wrap: wrap; gap: 4px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 5px; margin-bottom: 26px;
}
.seg-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 8px;
  font-size: 14px; font-weight: 600; color: var(--muted);
  background: none; border: none;
  transition: color .2s, background .2s;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active { color: var(--text-strong); background: var(--chip-hover); box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
.seg-btn .dot { width: 8px; height: 8px; border-radius: 50%; }

.env-panel[hidden] { display: none; }
.env-panel:not([hidden]) { display: block; animation: viewIn .35s ease both; }
.env-intro {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 18px; margin-bottom: 22px;
  font-size: 14px; color: var(--muted);
}
.env-intro b { color: var(--text); }

/* progress bar */
.checklist-progress { margin-bottom: 22px; }
.checklist-progress .cp-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 13px; }
.checklist-progress .cp-label { color: var(--muted); }
.checklist-progress .cp-count { color: var(--text); font-weight: 600; }
.cp-track { height: 7px; border-radius: 99px; background: var(--surface-2); overflow: hidden; border: 1px solid var(--border); }
.cp-fill { height: 100%; width: 0%; border-radius: 99px; background: linear-gradient(90deg, var(--amber), var(--purple)); transition: width .4s ease; }

/* ---------- STEP / CHECKLIST ---------- */
.steps { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 18px 18px 16px;
  transition: border-color .25s ease, background .25s ease;
}
.step.done { border-color: rgba(63, 185, 80, 0.35); background: linear-gradient(180deg, var(--green-soft), transparent 60%), var(--surface); }
.step-head { display: flex; gap: 13px; align-items: flex-start; }
.step-check {
  flex-shrink: 0; width: 24px; height: 24px; margin-top: 1px;
  border-radius: 7px; border: 1.5px solid var(--border-strong);
  background: var(--bg); position: relative; cursor: pointer;
  transition: background .2s, border-color .2s, transform .15s;
  display: inline-flex; align-items: center; justify-content: center;
}
.step-check:hover { transform: scale(1.06); border-color: var(--green); }
.step-check svg { width: 14px; height: 14px; stroke: #fff; stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; opacity: 0; transition: opacity .15s; }
.step-check.checked { background: var(--green); border-color: var(--green); }
.step-check.checked svg { opacity: 1; }
.step-body { flex: 1; min-width: 0; }
.step-num { font-size: 11px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; color: var(--faint); }
.step-title { font-size: 15.5px; font-weight: 650; color: var(--text-strong); margin: 2px 0 4px; }
.step-desc { font-size: 13.5px; color: var(--muted); margin-bottom: 12px; }
.step-desc:last-child { margin-bottom: 0; }

/* ---------- COMMAND / CODE BLOCKS ---------- */
.cmd {
  position: relative;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 46px 12px 14px;
  overflow-x: auto;
}
html[data-theme="light"] .cmd { background: #1a1622; border-color: rgba(28,20,40,0.18); }
.cmd code { color: #e6edf3; white-space: pre; display: block; line-height: 1.6; }
.cmd .tok-cmd { color: #e08a3c; }
.cmd .tok-flag { color: #a855f7; }
.cmd .tok-str { color: #3fb950; }
.cmd .tok-comment { color: #6f7681; }
.cmd .tok-path { color: #4f8ef7; }
.cmd-copy {
  position: absolute; top: 8px; right: 8px;
  width: 30px; height: 30px; border-radius: 7px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  color: #c4ccd4; display: inline-flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s, transform .15s;
}
.cmd-copy:hover { background: rgba(255,255,255,0.12); color: #fff; transform: translateY(-1px); }
.cmd-copy svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.cmd-copy.copied { color: var(--green); border-color: var(--green); }

.codeblock {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px; overflow-x: auto; position: relative;
}
html[data-theme="light"] .codeblock { background: #1a1622; border-color: rgba(28,20,40,0.18); }
.codeblock code { color: #e6edf3; white-space: pre; display: block; line-height: 1.65; font-size: 12.5px; }
.codeblock .k { color: #a855f7; }
.codeblock .s { color: #3fb950; }
.codeblock .c { color: #6f7681; }
.codeblock .n { color: #4f8ef7; }

/* expected output */
.expected {
  background: var(--green-soft); border: 1px solid rgba(63,185,80,0.3);
  border-radius: 10px; padding: 13px 15px; margin-top: 10px;
}
.expected .exp-label { font-size: 11px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; color: var(--green); display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
.expected pre { font-family: "SF Mono","Fira Code","Cascadia Code",monospace; font-size: 12.5px; color: var(--text); white-space: pre-wrap; line-height: 1.55; }

/* verify banner */
.verify-card {
  margin-top: 22px;
  background: linear-gradient(135deg, var(--amber-soft), var(--purple-soft));
  border: 1px solid var(--border); border-radius: 14px; padding: 20px;
}
.verify-card h4 { font-size: 16px; color: var(--text-strong); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.verify-card p { font-size: 13.5px; color: var(--muted); margin-bottom: 12px; }

/* ---------- TROUBLESHOOTER ---------- */
.ts-shell { max-width: 760px; }
.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  font-size: 12.5px; color: var(--muted); margin-bottom: 18px; min-height: 20px;
}
.breadcrumb button {
  background: none; border: none; color: var(--muted);
  padding: 2px 4px; border-radius: 5px; font-size: 12.5px;
}
.breadcrumb button:hover { color: var(--text); background: var(--chip); }
.breadcrumb .crumb-sep { color: var(--faint); }
.breadcrumb .crumb-current { color: var(--text); font-weight: 600; }

.ts-node { animation: nodeIn .32s ease both; }
@keyframes nodeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.ts-q {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 26px;
}
.ts-q .q-kicker { font-size: 12px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase; color: var(--purple); margin-bottom: 8px; }
.ts-q h3 { font-size: 21px; font-weight: 750; color: var(--text-strong); margin-bottom: 4px; }
.ts-q .q-sub { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.ts-options { display: flex; flex-direction: column; gap: 10px; }
.ts-option {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; text-align: left;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 11px; padding: 15px 16px;
  color: var(--text); font-size: 14.5px; font-weight: 500;
  transition: border-color .2s, background .2s, transform .15s;
}
.ts-option:hover { border-color: var(--purple); background: var(--surface-2); transform: translateX(3px); }
.ts-option .opt-arrow { color: var(--faint); transition: transform .2s, color .2s; flex-shrink: 0; }
.ts-option:hover .opt-arrow { color: var(--purple); transform: translateX(3px); }
.ts-option .opt-arrow svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.ts-fix {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 26px; border-top: 3px solid var(--green);
}
.ts-fix .fix-badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase;
  color: var(--green); background: var(--green-soft);
  padding: 5px 12px; border-radius: 20px; margin-bottom: 14px;
}
.ts-fix h3 { font-size: 20px; font-weight: 750; color: var(--text-strong); margin-bottom: 14px; }
.fix-cause {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--amber-soft); border: 1px solid rgba(224,138,60,0.28);
  border-radius: 11px; padding: 13px 15px; margin-bottom: 18px;
}
.fix-cause .fc-ic { color: var(--amber); flex-shrink: 0; margin-top: 1px; }
.fix-cause .fc-ic svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fix-cause span b { color: var(--text-strong); }
.fix-cause span { font-size: 13.5px; color: var(--muted); }
.fix-steps { display: flex; flex-direction: column; gap: 12px; margin-bottom: 8px; }
.fix-step { font-size: 14px; color: var(--text); }
.fix-step .fs-text { margin-bottom: 8px; }
.fix-step .fs-text b { color: var(--text-strong); }
.ts-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); }
.ts-actions .note { font-size: 12.5px; color: var(--faint); align-self: center; margin-left: auto; }

/* ---------- TERMINAL PLAYGROUND ---------- */
.term-note {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--muted);
  background: var(--chip); border: 1px solid var(--border);
  padding: 7px 13px; border-radius: 20px; margin-bottom: 18px;
}
.term-note svg { width: 15px; height: 15px; fill: none; stroke: var(--amber); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.terminal {
  position: relative;
  background: #0b0a10; border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 28px 64px rgba(0,0,0,0.5), 0 0 44px rgba(168,85,247,0.07);
}
html[data-theme="light"] .terminal { box-shadow: 0 26px 58px rgba(28,20,40,0.2); }
.terminal::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; z-index: 3;
  background: linear-gradient(90deg, #e08a3c, #a855f7, #e08a3c);
  background-size: 200% 100%; opacity: .85;
  animation: accent-shift 8s ease-in-out infinite;
}
.term-bar {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px; background: linear-gradient(180deg, #1a1824, #15131d);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.term-dot.r { background: #ff5f56; }
.term-dot.y { background: #ffbd2e; }
.term-dot.g { background: #27c93f; }
.term-title { margin-left: 8px; font-size: 12px; color: #8b8f99; font-family: "SF Mono","Fira Code",monospace; }
.term-clear {
  margin-left: auto; font-size: 11.5px; color: #8b8f99;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  padding: 4px 10px; border-radius: 6px; transition: color .2s, background .2s;
}
.term-clear:hover { color: #fff; background: rgba(255,255,255,0.12); }
.term-body {
  padding: 16px; min-height: 280px; max-height: 440px; overflow-y: auto;
  font-family: "SF Mono","Fira Code","Cascadia Code",monospace;
  font-size: 13px; line-height: 1.6; color: #d6dde4;
}
.term-line { white-space: pre-wrap; word-break: break-word; }
.term-prompt { color: #3fb950; }
.term-path { color: #4f8ef7; }
.term-cmd-text { color: #e6edf3; }
.term-out { color: #b9c0c9; }
.term-out .ok { color: #3fb950; }
.term-out .run { color: #e08a3c; }
.term-out .dim { color: #6f7681; }
.term-out .hl { color: #a855f7; }
.term-cursor {
  display: inline-block; width: 8px; height: 15px;
  background: #3fb950; vertical-align: text-bottom;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }
.term-suggest { margin-top: 16px; }
.term-suggest .ts-label { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.cmd-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.cmd-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: "SF Mono","Fira Code",monospace; font-size: 12.5px;
  color: var(--text); background: var(--surface); border: 1px solid var(--border);
  padding: 8px 13px; border-radius: 9px;
  transition: border-color .2s, transform .15s, background .2s;
}
.cmd-chip:hover:not(:disabled) { border-color: var(--amber); transform: translateY(-2px); background: var(--surface-2); }
.cmd-chip:disabled { opacity: .5; cursor: not-allowed; }
.cmd-chip .chip-pre { color: var(--amber); }

/* ---------- GOLDEN PATHS ---------- */
.runbooks { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); align-items: start; }
.runbook {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden;
  transition: border-color .25s ease;
}
.runbook.open { border-color: var(--border-strong); }
.runbook-head {
  display: flex; align-items: center; gap: 14px;
  width: 100%; text-align: left; background: none; border: none;
  padding: 20px;
}
.runbook-ic {
  width: 40px; height: 40px; border-radius: 11px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 19px;
  background: var(--purple-soft); color: var(--purple);
}
.runbook:nth-child(4n+1) .runbook-ic { background: var(--amber-soft); color: var(--amber); }
.runbook:nth-child(4n+2) .runbook-ic { background: var(--purple-soft); color: var(--purple); }
.runbook:nth-child(4n+3) .runbook-ic { background: var(--green-soft); color: var(--green); }
.runbook:nth-child(4n+4) .runbook-ic { background: var(--blue-soft); color: var(--blue); }
.runbook-meta { flex: 1; min-width: 0; }
.runbook-meta h3 { font-size: 15.5px; font-weight: 700; color: var(--text-strong); margin-bottom: 2px; }
.runbook-meta p { font-size: 13px; color: var(--muted); }
.runbook-chev { color: var(--faint); transition: transform .3s ease; flex-shrink: 0; }
.runbook-chev svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.runbook.open .runbook-chev { transform: rotate(180deg); }
.runbook-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s ease; }
.runbook.open .runbook-body { grid-template-rows: 1fr; }
.runbook-body > div { overflow: hidden; }
.runbook-inner { padding: 0 20px 20px; border-top: 1px solid var(--border); margin-top: 0; padding-top: 18px; }
.rb-steps { list-style: none; counter-reset: rb; display: flex; flex-direction: column; gap: 16px; }
.rb-step { position: relative; padding-left: 38px; counter-increment: rb; }
.rb-step::before {
  content: counter(rb);
  position: absolute; left: 0; top: 0;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--chip-hover); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--text);
}
.rb-step:not(:last-child)::after {
  content: ""; position: absolute; left: 13px; top: 28px; bottom: -16px;
  width: 1px; background: var(--border);
}
.rb-step .rb-text { font-size: 14px; color: var(--text); margin-bottom: 9px; }
.rb-step .rb-text b { color: var(--text-strong); }
.rb-good {
  margin-top: 18px; display: flex; gap: 11px; align-items: flex-start;
  background: var(--green-soft); border: 1px solid rgba(63,185,80,0.3);
  border-radius: 11px; padding: 14px 16px;
}
.rb-good .rg-ic { color: var(--green); flex-shrink: 0; margin-top: 1px; }
.rb-good .rg-ic svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.rb-good .rg-body b { display: block; font-size: 12px; font-weight: 700; letter-spacing: .4px; text-transform: uppercase; color: var(--green); margin-bottom: 4px; }
.rb-good .rg-body span { font-size: 13.5px; color: var(--muted); }

/* ---------- FOOTER ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 48px; margin-top: 20px;
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text-strong); }
.footer-brand .nav-logo { width: 26px; height: 26px; font-size: 14px; }
.footer-tag { font-size: 13px; color: var(--muted); margin-top: 8px; max-width: 280px; }
.footer-cols { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col h5 { font-size: 12px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; color: var(--faint); margin-bottom: 12px; }
.footer-col a, .footer-col button {
  display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 9px;
  background: none; border: none; padding: 0; text-align: left;
  transition: color .2s;
}
.footer-col a:hover, .footer-col button:hover { color: var(--text); }
.footer-bottom { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--faint); display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; }

/* ---------- ENV NOTE (initialize callout) ---------- */
.env-note {
  display: flex; gap: 11px; align-items: flex-start;
  background: linear-gradient(135deg, var(--blue-soft), transparent 72%);
  border: 1px solid var(--border); border-left: 3px solid var(--blue);
  border-radius: 10px; padding: 13px 15px; margin-bottom: 22px;
  font-size: 13.5px; color: var(--muted); line-height: 1.55;
}
.env-note .en-ic { color: var(--blue); flex-shrink: 0; margin-top: 1px; }
.env-note .en-ic svg { width: 17px; height: 17px; }
.env-note b { color: var(--text); }
.env-note code { color: var(--text-strong); background: var(--chip); padding: 1px 5px; border-radius: 4px; }

/* ---------- SCROLL REVEAL (gated by JS support + motion preference) ----------
   Base content is always visible; only html.reveal-ready (set when motion is
   allowed) hides + reveals. Reveal uses animation w/ backwards fill so element
   transitions (hover lift, etc.) stay intact afterward. */
html.reveal-ready [data-reveal] { opacity: 0; }
html.reveal-ready [data-reveal].is-in { opacity: 1; animation: revealIn .6s ease backwards; }
@keyframes revealIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
html.reveal-ready .tools-grid [data-reveal]:nth-child(2) { animation-delay: .06s; }
html.reveal-ready .tools-grid [data-reveal]:nth-child(3) { animation-delay: .12s; }
html.reveal-ready .tools-grid [data-reveal]:nth-child(4) { animation-delay: .18s; }
html.reveal-ready .facts [data-reveal]:nth-child(2) { animation-delay: .05s; }
html.reveal-ready .facts [data-reveal]:nth-child(3) { animation-delay: .10s; }
html.reveal-ready .facts [data-reveal]:nth-child(4) { animation-delay: .15s; }

/* ---------- HERO ENTRANCE (gated) ---------- */
html.reveal-ready .hero-copy > * { opacity: 0; animation: heroUp .6s ease forwards; }
html.reveal-ready .hero-copy > *:nth-child(1) { animation-delay: .05s; }
html.reveal-ready .hero-copy > *:nth-child(2) { animation-delay: .12s; }
html.reveal-ready .hero-copy > *:nth-child(3) { animation-delay: .19s; }
html.reveal-ready .hero-copy > *:nth-child(4) { animation-delay: .26s; }
html.reveal-ready .hero-copy > *:nth-child(5) { animation-delay: .33s; }
@keyframes heroUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
html.reveal-ready .hero-art { opacity: 0; animation: heroArtIn .7s ease .18s forwards; }
@keyframes heroArtIn { from { opacity: 0; transform: translateY(18px) scale(.98); } to { opacity: 1; transform: none; } }
html.reveal-ready .art-stage { opacity: 0; animation: artIn .5s ease forwards; animation-delay: var(--d); }
html.reveal-ready .art-ok { opacity: 0; animation: artFade .6s ease forwards; animation-delay: var(--d); }
@keyframes artIn { from { opacity: 0; transform: translateX(8px); } to { opacity: 1; transform: none; } }
@keyframes artFade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- HERO RESPONSIVE ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-meta { justify-content: center; }
  .hero-art { max-width: 440px; width: 100%; margin: 0 auto; }
}
@media (max-width: 560px) {
  .art-body { font-size: 12px; padding: 14px 14px 16px; }
  .hero-meta { gap: 10px; }
  .hero-meta-item + .hero-meta-item { padding-left: 10px; }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 860px) {
  .nav-links, .nav-side .nav-gh { display: none; }
  .nav-side .theme-toggle { display: none; }
  .nav-hamburger { display: flex; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .section { padding: 40px 0; }
  .ts-q, .ts-fix { padding: 20px; }
  .runbook-head { padding: 16px; }
  .runbook-inner { padding: 0 16px 18px; padding-top: 16px; }
  .seg { width: 100%; }
  .seg-btn { flex: 1; justify-content: center; padding: 10px 8px; }
  .ts-actions .note { margin-left: 0; width: 100%; }
  .footer-cols { gap: 28px; }
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .term-cursor { animation: none; opacity: 1; }
  .hero-accent { animation: none; }
}