/* ═══════════════════════════════════════════════════════════════
   BINDSIGHT — AWS SAA-C03 Decision Trainer
   Design system: "flight deck" — deep-ink blueprint, amber flight
   paths, category-coloured wiring, technical mono annotations.
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* surfaces */
  --ink-0: #08090D;
  --ink-1: #0C0F15;
  --ink-2: #121620;
  --ink-3: #1A2030;
  --ink-4: #232B3F;
  --line: #1F2637;
  --line-bright: #2D3652;

  /* text */
  --t-0: #EDF0F7;
  --t-1: #AEB6C9;
  --t-2: #7A849C;
  --t-3: #525C74;

  /* flight accents */
  --amber: #F5B93E;
  --amber-dim: rgba(245,185,62,.14);
  --sky: #56B4EB;
  --mint: #4ADE9E;
  --coral: #F87171;

  /* category wiring colours (10 teaching categories) */
  --cat-identity-security: #F5A524;
  --cat-storage: #6FBF73;
  --cat-compute: #E8853D;
  --cat-networking: #57A9E8;
  --cat-databases: #B07CE8;
  --cat-integration: #EF7AB3;
  --cat-monitoring: #3FD0C9;
  --cat-resilience: #C9CC3F;
  --cat-automation: #8F9DF3;
  --cat-governance: #C9A227;

  /* type */
  --display: "Bricolage Grotesque", sans-serif;
  --body: "Schibsted Grotesk", sans-serif;
  --mono: "IBM Plex Mono", monospace;

  /* geometry */
  --r-s: 6px;
  --r-m: 10px;
  --r-l: 16px;
  --r-xl: 22px;

  --rail-w: 232px;
  --topbar-h: 58px;

  --shadow-lift: 0 8px 30px rgba(0,0,0,.45), 0 2px 8px rgba(0,0,0,.5);
  --shadow-pop: 0 16px 50px rgba(0,0,0,.6);

  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .035 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  background: var(--ink-1);
  color: var(--t-0);
  font-size: 15.5px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  /* atmosphere: single subtle wash */
  content: "";
  position: fixed; inset: 0;
  background:
    radial-gradient(900px 480px at 78% -12%, rgba(86,180,235,.04), transparent 58%),
    linear-gradient(var(--ink-0), var(--ink-1));
  pointer-events: none;
  z-index: -2;
}
body::after {
  content: ""; position: fixed; inset: 0;
  background: var(--grain); opacity: .5; pointer-events: none; z-index: 60;
  mix-blend-mode: overlay;
}

::selection { background: rgba(245,185,62,.3); color: #fff; }

h1,h2,h3,h4 { font-family: var(--display); font-weight: 600; line-height: 1.18; letter-spacing: -.015em; }
.mono { font-family: var(--mono); font-size: .82em; letter-spacing: .02em; }

a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

:focus-visible { outline: 1px solid var(--sky); outline-offset: 2px; }

.skip-link {
  position: fixed; top: -48px; left: 12px; z-index: 200;
  background: var(--amber); color: #111; padding: 8px 14px; border-radius: var(--r-s);
  font-weight: 600; transition: top .2s;
}
.skip-link:focus { top: 10px; }

/* ─── topbar ─────────────────────────────────────────────── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  display: flex; align-items: center; gap: 20px;
  padding: 0 20px 0 16px;
  background: color-mix(in srgb, var(--ink-0) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 4px 6px; border-radius: var(--r-m); }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; background: var(--ink-2); border: 1px solid var(--line-bright); border-radius: 9px; }
.brand>svg { pointer-events: none; }
.brand-word { font-family: var(--display); font-weight: 700; font-size: 17px; letter-spacing: -.02em; display: flex; flex-direction: column; line-height: 1.05; align-items: flex-start; }
.brand-word b { color: var(--amber); font-weight: 700; }
.brand-word em { font-family: var(--mono); font-style: normal; font-weight: 400; font-size: 9.5px; color: var(--t-2); letter-spacing: .14em; text-transform: uppercase; margin-top: 2px; white-space: nowrap; }
.brand:hover { background: var(--ink-2); }

.topbar-progress { flex: 1; display: flex; align-items: center; gap: 12px; min-width: 0; }
.runway { flex: 1; max-width: 340px; height: 4px; border-radius: 99px; background: var(--ink-3); overflow: hidden; position: relative; }
.runway i { position: absolute; inset: 0; width: var(--p, 0%); background: var(--amber); border-radius: 99px; transition: width .6s cubic-bezier(.2,.8,.2,1); }
.runway::after { content: ""; position: absolute; right: 0; top: 50%; width: 7px; height: 7px; transform: translateY(-50%); background: var(--ink-4); border-radius: 99px; }
.topbar-progress .mono { color: var(--t-2); font-size: 11px; white-space: nowrap; }

.tape-toggle { font-family: var(--mono); font-size: 11.5px; color: var(--t-1); padding: 7px 12px; border: 1px solid var(--line-bright); border-radius: var(--r-s); background: var(--ink-2); transition: .15s; }
.tape-toggle:hover { color: var(--t-0); border-color: var(--t-3); background: var(--ink-3); }

/* ─── rail ───────────────────────────────────────────────── */
.rail {
  position: fixed; top: var(--topbar-h); left: 0; bottom: 0; width: var(--rail-w);
  padding: 18px 10px 30px;
  overflow-y: auto; scrollbar-width: thin;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--ink-0) 55%, transparent);
  z-index: 40;
}
.rail-group { margin: 14px 8px 6px; }
.rail-label { font-family: var(--mono); font-size: 9.5px; letter-spacing: .22em; text-transform: uppercase; color: var(--t-3); }
.rail-item {
  display: flex; align-items: center; gap: 11px; width: 100%;
  padding: 8px 10px; border-radius: var(--r-m); text-align: left;
  color: var(--t-1); font-size: 13.5px; font-weight: 500;
  position: relative; transition: .15s;
}
.rail-item svg { flex: none; opacity: .75; }
.rail-item:hover { background: var(--ink-2); color: var(--t-0); }
.rail-item.active { background: linear-gradient(90deg, var(--amber-dim), transparent 130%); color: var(--t-0); }
.rail-item.active svg { opacity: 1; color: var(--amber); }
.rail-item.active::before { content: ""; position: absolute; left: -10px; top: 8px; bottom: 8px; width: 2.5px; background: var(--amber); border-radius: 3px; }
.rail-key { margin-left: auto; font-family: var(--mono); font-size: 9.5px; color: var(--t-3); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; }
.rail-dot { margin-left: auto; width: 6px; height: 6px; border-radius: 99px; background: var(--ink-4); }

.rail-toggle { display: none; }

/* ─── main ───────────────────────────────────────────────── */
.main {
  margin-top: var(--topbar-h); margin-left: var(--rail-w);
  padding: 34px clamp(18px, 4vw, 56px) 80px;
  min-height: calc(100vh - var(--topbar-h));
  max-width: 1500px;
}

.footer { margin-left: var(--rail-w); padding: 26px clamp(18px,4vw,56px) 40px; border-top: 1px solid var(--line); }
.footer p { color: var(--t-3); font-size: 12.5px; max-width: 900px; }
.footer strong { color: var(--t-2); }

/* ─── shared components ──────────────────────────────────── */
.eyebrow {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--t-2); display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--t-3); }

.page-head { margin-bottom: 28px; }
.page-head h1 { font-size: clamp(26px, 4.2vw, 40px); font-weight: 700; margin: 8px 0 10px; }
.page-head .lede { color: var(--t-1); max-width: 720px; font-size: 15.5px; }

.section-rule { display:flex; align-items:center; gap:14px; margin: 40px 0 18px; }
.section-rule h2 { font-size: 19px; white-space: nowrap; }
.section-rule::after { content: ""; height: 1px; flex: 1; background: linear-gradient(90deg, var(--line-bright), transparent); }

.panel {
  background: linear-gradient(180deg, var(--ink-2), color-mix(in srgb, var(--ink-2) 70%, var(--ink-1)));
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  padding: 22px;
  position: relative;
}
.panel.glow { border-color: var(--line-bright); }

.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2,1fr); } .grid-3 { grid-template-columns: repeat(2,1fr);} }
@media (max-width: 700px)  { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  padding: 3px 9px; border-radius: var(--r-s); letter-spacing: .04em;
  border: 1px solid var(--line-bright); background: var(--ink-3); color: var(--t-1);
  white-space: nowrap;
}
.badge.cat { color: color-mix(in srgb, var(--c) 85%, #fff); background: color-mix(in srgb, var(--c) 12%, transparent); border-color: color-mix(in srgb, var(--c) 35%, transparent); }
.badge.good { color: var(--mint); border-color: color-mix(in srgb, var(--mint) 40%, transparent); background: color-mix(in srgb, var(--mint) 10%, transparent); }
.badge.warn { color: var(--coral); border-color: color-mix(in srgb, var(--coral) 40%, transparent); background: color-mix(in srgb, var(--coral) 10%, transparent); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  font-family: var(--body); font-weight: 600; font-size: 14px;
  padding: 10px 20px; border-radius: var(--r-m);
  background: var(--amber); color: #131006;
  border: 1px solid transparent;
  transition: .18s; text-decoration: none;
}
.btn:hover { border-color: color-mix(in srgb, var(--amber) 55%, #fff); text-decoration: none; }
.btn.ghost { background: var(--ink-3); color: var(--t-0); border-color: var(--line-bright); }
.btn.ghost:hover { border-color: var(--t-3); }
.btn.subtle { background: transparent; color: var(--t-1); border-color: var(--line); font-weight: 500; }
.btn.subtle:hover { color: var(--t-0); background: var(--ink-3); border-color: var(--line-bright); }
.btn.danger { background: color-mix(in srgb, var(--coral) 18%, transparent); color: var(--coral); border-color: color-mix(in srgb, var(--coral) 40%, transparent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.sm { padding: 6px 13px; font-size: 12.5px; border-radius: var(--r-s); }

.field {
  width: 100%; background: var(--ink-0); border: 1px solid var(--line-bright);
  border-radius: var(--r-m); padding: 11px 14px; font-size: 14px;
  transition: border-color .15s;
}
.field:focus { outline: 1px solid var(--sky); outline-offset: 0; border-color: var(--sky); }
textarea.field { resize: vertical; min-height: 110px; line-height: 1.55; }

kbd { font-family: var(--mono); font-size: .8em; background: var(--ink-3); border: 1px solid var(--line-bright); border-bottom-width: 2px; padding: 1px 6px; border-radius: 5px; }

/* callout */
.callout {
  border-left: 3px solid var(--sky);
  background: color-mix(in srgb, var(--sky) 7%, var(--ink-2));
  padding: 14px 18px; border-radius: 0 var(--r-m) var(--r-m) 0;
  font-size: 14px; color: var(--t-1);
}
.callout.amber { border-color: var(--amber); background: color-mix(in srgb, var(--amber) 8%, var(--ink-2)); color: var(--t-1); }
.callout.coral { border-color: var(--coral); background: color-mix(in srgb, var(--coral) 8%, var(--ink-2)); }
.callout b { color: var(--t-0); }

/* progress ring */
.ring { --p: 0; width: 46px; height: 46px; position: relative; flex: none; }
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring .track { fill: none; stroke: var(--ink-3); stroke-width: 4; }
.ring .bar { fill: none; stroke: var(--c, var(--amber)); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 100; stroke-dashoffset: calc(100 - var(--p)); transition: stroke-dashoffset .8s ease; }
.ring span { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--mono); font-size: 10.5px; color: var(--t-0); font-weight: 600; }

/* chips (requirement selection) */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line-bright); background: var(--ink-2);
  padding: 9px 15px; border-radius: var(--r-s); font-size: 13.5px; font-weight: 500;
  cursor: pointer; transition: .16s; color: var(--t-1); user-select: none;
}
.chip:hover { border-color: var(--t-3); color: var(--t-0); }
.chip.on { background: color-mix(in srgb, var(--sky) 16%, var(--ink-2)); border-color: var(--sky); color: #EAF6FF; }
.chip .dot { width: 7px; height: 7px; border-radius: 99px; background: var(--t-3); flex: none; }
.chip.on .dot { background: var(--sky); }

/* option cards (service / feature choice) */
.opts { display: grid; gap: 10px; }
.opt {
  display: flex; gap: 14px; align-items: flex-start; text-align: left;
  border: 1px solid var(--line); background: var(--ink-2); border-radius: var(--r-m);
  padding: 14px 16px; transition: .16s; cursor: pointer; width: 100%;
}
.opt:hover { border-color: var(--line-bright); background: var(--ink-3); }
.opt .opt-id { font-family: var(--mono); font-size: 11px; color: var(--t-2); background: var(--ink-0); border: 1px solid var(--line); padding: 3px 8px; border-radius: 5px; flex: none; margin-top: 2px; }
.opt .opt-title { font-weight: 600; font-size: 14.5px; }
.opt .opt-sub { color: var(--t-2); font-size: 13px; margin-top: 2px; }
.opt.on { border-color: var(--sky); background: color-mix(in srgb, var(--sky) 9%, var(--ink-2)); }
.opt.on .opt-id { color: var(--sky); border-color: color-mix(in srgb, var(--sky) 50%, transparent); }
.opt.right { border-color: var(--mint); background: color-mix(in srgb, var(--mint) 9%, var(--ink-2)); }
.opt.wrong { border-color: var(--coral); background: color-mix(in srgb, var(--coral) 8%, var(--ink-2)); }
.opt:disabled { cursor: default; }

/* stepper */
.steps { display: flex; gap: 6px; margin: 22px 0 26px; flex-wrap: wrap; }
.step-tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .05em;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 12px; border-radius: var(--r-s); border: 1px solid var(--line);
  background: var(--ink-2); color: var(--t-2);
  transition: .2s;
}
.step-tag b { font-weight: 600; }
.step-tag.active { color: #131006; background: var(--amber); border-color: var(--amber); font-weight: 600; }
.step-tag.done { color: var(--mint); border-color: color-mix(in srgb, var(--mint) 40%, transparent); background: color-mix(in srgb, var(--mint) 9%, transparent); }

/* reveal levels */
.depth-tabs { display: inline-flex; border: 1px solid var(--line-bright); border-radius: var(--r-s); padding: 3px; background: var(--ink-0); gap: 2px; }
.depth-tabs button { font-size: 12px; font-weight: 600; padding: 5px 14px; border-radius: var(--r-s); color: var(--t-2); }
.depth-tabs button.on { background: var(--ink-3); color: var(--amber); }

/* tables */
.compare { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.compare th { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--t-2); text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line-bright); background: var(--ink-2); }
.compare th.hl { color: var(--t-0); border-bottom-color: var(--amber); }
.compare td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--t-1); }
.compare td.hl { background: color-mix(in srgb, var(--amber) 5%, transparent); }
.compare td strong { color: var(--t-0); font-weight: 650; }
.compare-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-l); background: var(--ink-1); }

/* diagrams */
.diagram-wrap { background: var(--ink-0); border: 1px solid var(--line); border-radius: var(--r-l); padding: 10px; overflow: hidden; }
.diagram-wrap svg { width: 100%; height: auto; display: block; }

/* feature list */
.feat { border: 1px solid var(--line); border-radius: var(--r-m); background: var(--ink-2); overflow: hidden; }
.feat + .feat { margin-top: 10px; }
.feat-head { display: flex; align-items: center; gap: 12px; padding: 13px 16px; cursor: pointer; width: 100%; text-align: left; }
.feat-head:hover { background: var(--ink-3); }
.feat-head .catkey { width: 8px; height: 26px; border-radius: 4px; background: var(--c, var(--amber)); flex: none; }
.feat-head .t { font-weight: 600; flex: 1; }
.feat-head .req { font-size: 12.5px; color: var(--t-2); font-weight: 400; }
.feat-head .caret { color: var(--t-3); transition: .2s; flex: none; }
.feat.open .caret { transform: rotate(180deg); }
.feat-body { display: none; padding: 4px 16px 16px 36px; border-top: 1px solid var(--line); font-size: 13.8px; color: var(--t-1); }
.feat.open .feat-body { display: block; animation: fadeUp .25s ease; }
.feat-body .row { display: grid; grid-template-columns: 130px 1fr; gap: 10px; padding: 9px 0; }
.feat-body .row + .row { border-top: 1px dashed var(--line); }
.feat-body .row .k { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--t-2); padding-top: 2px; }
.feat-body .row .k.ok { color: var(--mint); }
@media (max-width: 640px) { .feat-body .row { grid-template-columns: 1fr; gap: 2px; } }

/* dashboard */
.hero {
  position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--r-xl);
  background: linear-gradient(160deg, var(--ink-2), var(--ink-1));
  padding: 34px clamp(20px, 4vw, 44px);
  margin-bottom: 30px;
}
.hero h1 { font-size: clamp(26px, 4.5vw, 42px); font-weight: 700; }
.hero h1 .accent { color: var(--amber); }
.hero .lede { color: var(--t-1); max-width: 640px; margin-top: 10px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }

.stat { display: flex; gap: 14px; align-items: center; padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--r-l); background: var(--ink-2); }
.stat .k { font-family: var(--display); font-size: 26px; font-weight: 700; line-height: 1; }
.stat .lbl { color: var(--t-2); font-size: 12.5px; margin-top: 4px; }

.day-strip { display: grid; grid-template-columns: repeat(14, 1fr); gap: 5px; }
.day-cell { appearance: none; background: transparent; width: 100%; border: 1px solid var(--line); border-radius: 7px; padding: 8px 2px 6px; text-align: center; font-family: var(--mono); font-size: 10.5px; color: var(--t-2); position: relative; cursor: pointer; transition: .15s; overflow: hidden; }
.day-cell:hover { border-color: var(--line-bright); }
.day-cell .dk { font-weight: 600; display: block; font-family: var(--display); font-size: 13px; color: var(--t-0); }
.day-cell.done { border-color: color-mix(in srgb, var(--mint) 45%, transparent); background: color-mix(in srgb, var(--mint) 9%, transparent); }
.day-cell.available { border-color: color-mix(in srgb, var(--amber) 50%, transparent); background: color-mix(in srgb, var(--amber) 8%, transparent); }
.day-cell.available::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--amber); }
.day-cell.locked { opacity: .45; }
.day-cell .bar-fill { position: absolute; left: 0; bottom: 0; background: color-mix(in srgb, var(--sky) 45%, transparent); height: 3px; }
@media (max-width: 900px) { .day-strip { grid-template-columns: repeat(7, 1fr); } }

/* weak areas */
.weak-item { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border: 1px solid var(--line); border-radius: var(--r-m); background: var(--ink-2); }
.weak-item .meter { height: 5px; border-radius: 3px; background: var(--ink-3); flex: 1; overflow: hidden; }
.weak-item .meter i { display: block; height: 100%; border-radius: 3px; }

/* explorer cards */
.svc-card {
  display: flex; flex-direction: column; gap: 8px;
  border: 1px solid var(--line); border-radius: var(--r-l); padding: 18px;
  background: var(--ink-2); cursor: pointer; text-align: left; width: 100%;
  transition: .18s; position: relative; overflow: hidden;
}
.svc-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2.5px; background: var(--c); opacity: .85; }
.svc-card:hover { border-color: color-mix(in srgb, var(--c) 45%, var(--line)); }
.svc-card .nm { font-family: var(--display); font-weight: 650; font-size: 16px; letter-spacing: -.01em; }
.svc-card .tg { color: var(--t-2); font-size: 13px; line-height: 1.5; flex: 1; }
.svc-card .meta { display: flex; gap: 6px; flex-wrap: wrap; }

/* service page */
.svc-hero { border: 1px solid var(--line); border-radius: var(--r-xl); padding: 30px clamp(20px, 3.5vw, 40px); position: relative; overflow: hidden; margin-bottom: 26px;
  background: radial-gradient(700px 300px at 12% -20%, color-mix(in srgb, var(--c) 12%, transparent), transparent 60%), var(--ink-2); }
.svc-hero::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--c); }
.svc-hero h1 { font-size: clamp(28px, 4vw, 40px); margin: 6px 0 8px; }
.svc-hero .tag { font-size: 16.5px; color: var(--t-1); max-width: 720px; }
.prose { color: var(--t-1); font-size: 14.5px; }
.prose p + p { margin-top: 10px; }
.prose ul { padding-left: 20px; margin: 8px 0; }
.prose li { margin: 5px 0; }
.prose b, .prose strong { color: var(--t-0); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; } }

.kv-list { display: grid; gap: 8px; }
.kv-list .kv { display: grid; grid-template-columns: 16px 1fr; gap: 10px; font-size: 13.8px; color: var(--t-1); align-items: baseline; }
.kv-list .kv svg { transform: translateY(2px); }
.kv-list .yes { color: var(--mint); }
.kv-list .no { color: var(--coral); }

/* decision lab */
.dl-card {
  border: 1px solid var(--line); border-radius: var(--r-l); background: var(--ink-2);
  padding: 18px; cursor: pointer; text-align: left; width: 100%; transition: .18s;
  display: flex; flex-direction: column; gap: 9px; position: relative;
}
.dl-card:hover { border-color: var(--line-bright); }
.dl-card .top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.dl-card .co { font-family: var(--mono); font-size: 11px; color: var(--t-2); letter-spacing: .08em; text-transform: uppercase; }
.dl-card .t { font-family: var(--display); font-weight: 650; font-size: 15.5px; }
.dl-card .s { color: var(--t-2); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.dl-card.solved { border-color: color-mix(in srgb, var(--mint) 40%, transparent); }
.dl-card.failed { border-color: color-mix(in srgb, var(--coral) 35%, transparent); }
.dl-card .solvedflag { position: absolute; top: 14px; right: 14px; }

.scenario-text {
  font-size: 16.5px; line-height: 1.7; color: var(--t-0);
  border-left: 3px solid var(--amber); padding: 6px 0 6px 20px; margin: 18px 0;
}
.scenario-text .co-tag { display: block; font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--amber); margin-bottom: 8px; }

.feedback-panel {
  border: 1px solid color-mix(in srgb, var(--mint) 40%, transparent);
  background: color-mix(in srgb, var(--mint) 6%, var(--ink-2));
  border-radius: var(--r-l); padding: 20px 22px;
  animation: fadeUp .3s ease;
}
.feedback-panel.partial { border-color: color-mix(in srgb, var(--amber) 45%, transparent); background: color-mix(in srgb, var(--amber) 6%, var(--ink-2)); }
.feedback-panel.miss { border-color: color-mix(in srgb, var(--coral) 45%, transparent); background: color-mix(in srgb, var(--coral) 6%, var(--ink-2)); }
.feedback-panel h3 { font-size: 18px; display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.verdict { display:inline-flex; padding: 4px 14px; border-radius: var(--r-s); font-family: var(--mono); font-size: 11px; letter-spacing: .08em; }
.verdict.ok { background: color-mix(in srgb, var(--mint) 20%, transparent); color: var(--mint); }
.verdict.mid { background: color-mix(in srgb, var(--amber) 20%, transparent); color: var(--amber); }
.verdict.bad { background: color-mix(in srgb, var(--coral) 20%, transparent); color: var(--coral); }
.fb-row { display: grid; grid-template-columns: 150px 1fr; gap: 12px; padding: 10px 0; border-top: 1px solid color-mix(in srgb, var(--mint) 15%, var(--line)); font-size: 13.8px; }
.feedback-panel.partial .fb-row, .feedback-panel.miss .fb-row { border-top-color: color-mix(in srgb, var(--amber) 15%, var(--line)); }
.fb-row .k { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--t-2); padding-top: 3px; }
@media (max-width: 640px) { .fb-row { grid-template-columns: 1fr; gap: 4px; } }

/* builder */
.builder-hint {
  margin: 0 0 12px; padding: 10px 14px; border-radius: var(--r-m);
  border: 1px solid var(--line); background: var(--ink-2);
  color: var(--t-2); font-size: 13px; line-height: 1.45;
}
.builder-hint b { color: var(--amber); font-weight: 600; }
.flow-label-form {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}
.canvas-empty {
  position: absolute; inset: 0; z-index: 0;
  display: grid; place-content: center; gap: 6px; text-align: center;
  pointer-events: none; color: var(--t-3); padding: 24px;
}
.canvas-empty[hidden] { display: none !important; }
.canvas-empty strong {
  font-family: var(--display); font-size: 15px; font-weight: 650; color: var(--t-2);
}
.canvas-empty p { margin: 0; font-size: 13px; max-width: 280px; line-height: 1.45; }
.builder-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr) 260px; gap: 16px; align-items: start; }
@media (max-width: 1100px) { .builder-grid { grid-template-columns: 200px minmax(0, 1fr); } .builder-side { grid-column: 1 / -1; } }
@media (max-width: 900px) { .builder-grid { grid-template-columns: 1fr; } }
.palette { border: 1px solid var(--line); border-radius: var(--r-l); background: var(--ink-2); padding: 14px; max-height: 640px; overflow-y: auto; position: sticky; top: calc(var(--topbar-h) + 16px); }
.palette .pal-item { display: flex; align-items: center; gap: 9px; width: 100%; padding: 8px 10px; border-radius: var(--r-s); font-size: 13px; color: var(--t-1); text-align: left; border: 1px solid transparent; transition: .14s; }
.palette .pal-item:hover { background: var(--ink-3); border-color: var(--line); color: var(--t-0); }
.canvas-zone {
  border: 1.5px dashed var(--line-bright); border-radius: var(--r-l);
  background:
    radial-gradient(circle, var(--line) 1px, transparent 1px);
  background-size: 26px 26px;
  min-height: 520px; position: relative; overflow: auto;
}
.canvas-zone.is-connecting { border-color: var(--amber); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--amber) 35%, transparent); cursor: crosshair; }
.canvas-node {
  position: absolute; z-index: 2; cursor: grab;
  border: 1.5px solid var(--c); background: color-mix(in srgb, var(--ink-2) 88%, transparent);
  backdrop-filter: blur(4px);
  border-radius: 10px; padding: 8px 12px 10px; min-width: 96px; text-align: center;
  font-size: 12.5px; font-weight: 600; user-select: none;
  box-shadow: 0 4px 14px rgba(0,0,0,.4);
}
.canvas-node:active { cursor: grabbing; }
.canvas-node small { display: block; font-family: var(--mono); font-size: 8.5px; color: var(--t-2); font-weight: 400; letter-spacing: .08em; text-transform: uppercase; }
.canvas-node .rm { position: absolute; top: -8px; right: -8px; width: 18px; height: 18px; border-radius: 99px; background: var(--coral); color: #fff; font-size: 10px; line-height: 18px; text-align: center; opacity: 0; transition: .15s; cursor: pointer; }
.canvas-node .port {
  position: absolute; right: -9px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; border-radius: 99px; padding: 0;
  background: var(--amber); border: 2px solid var(--ink-0);
  cursor: crosshair; opacity: 0.85; transition: .15s;
}
.canvas-node .port:hover, .canvas-node.connecting .port { opacity: 1; transform: translateY(-50%) scale(1.15); }
.canvas-node:hover .rm { opacity: 1; }
.canvas-node.connecting { outline: 2px dashed var(--amber); outline-offset: 3px; }
.canvas-node.wire-target { outline: 2px solid var(--sky); outline-offset: 3px; }
.canvas-zone.is-connecting { cursor: crosshair; }
.canvas-zone.is-connecting .canvas-node { cursor: crosshair; }
.flow-label { font-family: var(--mono); font-size: 10.5px; fill: var(--amber); font-weight: 600; }
.score-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.score-row:last-child { border: none; }
.score-row .bar { width: 110px; height: 5px; background: var(--ink-3); border-radius: 3px; overflow: hidden; align-self: center; }
.score-row .bar i { display: block; height: 100%; border-radius: 3px; transition: width .5s ease; }

/* exam */
.qq { border: 1px solid var(--line); border-radius: var(--r-l); background: var(--ink-2); padding: 24px 26px; margin-bottom: 16px; }
.qq .stem { font-size: 15.5px; line-height: 1.65; margin: 14px 0 18px; }
.qq .opts .opt { align-items: stretch; }
.qq .letter { font-family: var(--mono); font-size: 11px; width: 22px; height: 22px; display: grid; place-items: center; border: 1px solid var(--line-bright); border-radius: 5px; flex: none; margin-top: 2px; background: var(--ink-0); }
.opt.on .letter, .opt.right .letter { border-color: var(--mint); color: var(--mint); }

/* interview */
.score-pill { display: flex; gap: 14px; flex-wrap: wrap; margin: 14px 0 4px; }
.ess { display: flex; gap: 10px; align-items: flex-start; padding: 9px 12px; border-radius: var(--r-s); background: var(--ink-3); font-size: 13.5px; color: var(--t-1); }
.ess.hit { background: color-mix(in srgb, var(--mint) 10%, var(--ink-3)); color: var(--t-0); }
.ess.miss { background: color-mix(in srgb, var(--coral) 8%, var(--ink-3)); }

/* labs */
.lab-step { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.lab-step .n { width: 30px; height: 30px; border-radius: 99px; background: var(--ink-3); border: 1px solid var(--line-bright); display: grid; place-items: center; font-family: var(--mono); font-size: 12px; color: var(--amber); font-weight: 600; }
.lab-check { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; font-size: 13.8px; color: var(--t-1); cursor: pointer; }
.lab-check input { accent-color: var(--mint); margin-top: 4px; }

/* command palette */
.cmdk-backdrop { position: fixed; inset: 0; background: rgba(4,5,10,.68); backdrop-filter: blur(6px); z-index: 120; display: grid; place-items: start center; padding-top: 14vh; }
.cmdk-backdrop[hidden] { display: none !important; }
.cmdk { width: min(620px, 92vw); background: var(--ink-2); border: 1px solid var(--line-bright); border-radius: var(--r-l); box-shadow: var(--shadow-pop); overflow: hidden; }
.cmdk-input { width: 100%; background: transparent; border: none; border-bottom: 1px solid var(--line); padding: 16px 20px; font-size: 15px; }
.cmdk-input:focus { outline: none; }
.cmdk-results { max-height: 320px; overflow-y: auto; padding: 8px; }
.cmdk-item { display: flex; gap: 12px; align-items: center; width: 100%; padding: 9px 12px; border-radius: var(--r-s); text-align: left; font-size: 13.5px; color: var(--t-1); }
.cmdk-item .mono { color: var(--t-3); font-size: 10.5px; }
.cmdk-item:hover, .cmdk-item.sel { background: var(--ink-3); color: var(--t-0); }

/* toast */
.toast-tray { position: fixed; bottom: 20px; right: 20px; z-index: 150; display: grid; gap: 8px; }
.toast { background: var(--ink-3); border: 1px solid var(--line-bright); border-left: 3px solid var(--amber); border-radius: var(--r-m); padding: 12px 18px; font-size: 13.5px; box-shadow: 0 4px 14px rgba(0,0,0,.35); animation: slideIn .3s cubic-bezier(.2,.9,.3,1.2); max-width: 340px; }
.toast.ok { border-left-color: var(--mint); }
.toast.bad { border-left-color: var(--coral); }

/* misc animation */
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes slideIn { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: none; } }

/* responsive */
@media (max-width: 1020px) {
  .rail { transform: translateX(-105%); transition: transform .25s ease; width: min(280px, 84vw); background: var(--ink-1); box-shadow: var(--shadow-pop); }
  body.rail-open .rail { transform: none; }
  body.rail-open::after { content: ""; z-index: 35; position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(0,0,0,.5); }
  .rail-toggle { position: fixed; left: 14px; bottom: 16px; z-index: 45; width: 44px; height: 44px; border-radius: 99px; background: var(--ink-3); border: 1px solid var(--line-bright); display: grid; place-items: center; color: var(--t-1); box-shadow: var(--shadow-pop); }
  .main, .footer { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}