/* ==========================================================================
   KaySociety — learning hub styles
   Loads after /_next/static/css/36d772dccf9cd13e.css and /custom-about.css,
   so every token (--bg, --line, --font-mono, ...) is inherited from there.
   Identity: same near-black canvas as KaraboSec, mint/terminal-green accent.
   ========================================================================== */

.ks-page main.site-main {
  width: 100%;
  max-width: none;
  padding: 0;
}

.ks-wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--s-6) var(--s-4) var(--s-8);
}

/* ---------- accents ---------- */
:root {
  --ks: #22c55e;
  --ks-strong: #4ade80;
  --ks-deep: #16a34a;
  --ks-glow: rgba(34, 197, 94, 0.35);
  --ks-ink: #052e14;
  --ks-warn: #f59e0b;
  --ks-bad: #ef4444;
  --ks-info: #60a5fa;
}

/* ---------- kicker / headers ---------- */
.ks-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-dim);
}
.ks-kicker svg { width: 1em; height: 1em; }

.ks-h1 {
  font-family: var(--font-sans);
  font-size: var(--fs-h1);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  margin: 0.9rem 0 0.6rem;
}
.ks-h1 .grad {
  background: linear-gradient(92deg, var(--ks) 10%, var(--ks-strong) 55%, #a7f3d0 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ks-sub {
  color: var(--text-dim);
  font-size: var(--fs-md);
  max-width: 62ch;
  margin: 0;
}
.ks-section { margin-top: var(--s-8); }
.ks-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
  margin-bottom: var(--s-5);
}
.ks-section-head h2 {
  font-family: var(--font-sans);
  font-size: var(--fs-h2);
  letter-spacing: var(--tracking-tight);
  color: var(--text);
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.ks-section-head h2 svg { width: 1.15em; height: 1.15em; color: var(--ks); }
.ks-section-head .ks-more {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-dim);
}
.ks-section-head .ks-more:hover { color: var(--ks); }

/* ---------- buttons ---------- */
.ks-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--fs-sm);
  padding: 0.7rem 1.2rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.ks-btn:hover { transform: translateY(-2px); border-color: var(--ks); }
.ks-btn:focus-visible { outline: 2px solid var(--ks); outline-offset: 2px; }
.ks-btn--primary {
  background: linear-gradient(135deg, var(--ks-deep), var(--ks));
  border-color: transparent;
  color: #04120a;
}
.ks-btn--primary:hover { border-color: var(--ks-strong); }
.ks-btn--ghost { background: transparent; border-color: var(--line); color: var(--text-muted); }
.ks-btn--ghost:hover { color: var(--text); }
.ks-btn svg { width: 1em; height: 1em; }
.ks-btn[disabled] { opacity: 0.45; pointer-events: none; }

/* ---------- cards ---------- */
.ks-card {
  position: relative;
  background: linear-gradient(165deg, #121212, #0b0b0b);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-4);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.ks-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}
.ks-grid { display: grid; gap: .9rem; grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr)); }
.ks-grid--wide { grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); }

.ks-icon-chip {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: #0d0d0d;
  color: var(--text-muted);
  margin-bottom: var(--s-3);
}
.ks-icon-chip svg { width: 22px; height: 22px; }
.ks-card h3 { margin: 0 0 0.35rem; font-size: var(--fs-md); font-weight: 600; letter-spacing: var(--tracking-tight); }
.ks-card p { margin: 0; color: var(--text-dim); font-size: var(--fs-sm); line-height: var(--lh-body); }
.ks-card .ks-go {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: var(--s-4);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-dim);
}
.ks-card .ks-go svg { width: 0.9em; height: 0.9em; transition: transform var(--dur-fast) var(--ease); }
.ks-card:hover .ks-go { color: var(--text); }
.ks-card:hover .ks-go svg { transform: translate(4px); }

/* ---------- hero ---------- */
.ks-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--s-6);
  align-items: center;
  padding-top: var(--s-6);
}
.ks-hero__cta { display: flex; gap: var(--s-3); flex-wrap: wrap; margin-top: var(--s-5); }
.ks-hero__stats { display: flex; gap: var(--s-5); flex-wrap: wrap; margin-top: var(--s-6); }
.ks-stat b { display: block; font-family: var(--font-mono); font-size: 1.35rem; color: var(--text); }
.ks-stat span { font-size: var(--fs-xs); font-family: var(--font-mono); color: var(--text-dim); text-transform: uppercase; letter-spacing: var(--tracking-wide); }

.ks-term {
  background: #0a0f0b;
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px -40px var(--ks-glow);
}
.ks-term__bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 0.9rem;
  background: #0c130e;
  border-bottom: 1px solid rgba(34, 197, 94, 0.2);
}
.ks-term__dot { width: 11px; height: 11px; border-radius: 50%; background: #1f2937; }
.ks-term__dot--g { background: #22c55e; }
.ks-term__dot--y { background: #f59e0b; }
.ks-term__dot--r { background: #ef4444; }
.ks-term__title { margin-left: auto; font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim); }
.ks-term__body {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.65;
  padding: var(--s-4);
  min-height: 230px;
  white-space: pre-wrap;
  word-break: break-word;
}
.ks-term__body .ln-prompt { color: var(--ks-strong); }
.ks-term__body .ln-out { color: var(--text-muted); }
.ks-term__body .ln-ok { color: var(--ks); }
.ks-caret {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  background: var(--ks);
  vertical-align: text-bottom;
  animation: caretBlink 1s step-end infinite;
}

/* ---------- marquee ticker ---------- */
.ks-ticker {
  margin-top: var(--s-7);
  border-block: 1px solid var(--line);
  overflow: hidden;
  display: flex;
}
.ks-ticker__track {
  display: flex;
  gap: var(--s-6);
  padding: 0.7rem 0;
  white-space: nowrap;
  animation: ksmarquee 26s linear infinite;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-dim);
}
.ks-ticker__track b { color: var(--ks); font-weight: 500; }
@keyframes ksmarquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- XP HUD ---------- */
.ks-hud {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 300;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #080808ee;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  padding: 0.45rem 0.85rem 0.45rem 0.5rem;
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}
.ks-hud__lvl {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 34px;
  padding: 0 0.3rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ks-deep), var(--ks));
  color: #04120a;
  font-weight: 700;
  font-size: 0.78rem;
}
.ks-hud__bar { width: 86px; height: 6px; border-radius: 99px; background: #1c1c1c; overflow: hidden; }
.ks-hud__fill { height: 100%; width: 0%; border-radius: 99px; background: linear-gradient(90deg, var(--ks-deep), var(--ks-strong)); transition: width 0.5s var(--ease); }
.ks-hud__xp { color: var(--ks-strong); font-weight: 600; }
.ks-hud__flame { color: var(--ks-warn); display: inline-flex; align-items: center; gap: 0.25rem; }
.ks-hud__flame svg { width: 0.95em; height: 0.95em; }

/* ---------- toasts ---------- */
.ks-toasts { position: fixed; left: 50%; bottom: 1.2rem; transform: translateX(-50%); z-index: 400; display: grid; gap: 0.5rem; width: min(92vw, 380px); }
.ks-toast {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #0c130eee;
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: var(--r-md);
  padding: 0.7rem 0.95rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  animation: kstoast-in 0.28s var(--ease);
}
.ks-toast svg { width: 1.05em; height: 1.05em; color: var(--ks); flex: none; }
.ks-toast--info { border-color: rgba(96, 165, 250, 0.4); }
.ks-toast--info svg { color: var(--ks-info); }
@keyframes kstoast-in { from { opacity: 0; transform: translateY(12px) scale(0.97); } to { opacity: 1; transform: none; } }
.ks-toast.is-leaving { opacity: 0; transform: translateY(8px); transition: all 0.3s var(--ease); }

/* ---------- confetti ---------- */
.ks-confetti-bit {
  position: fixed;
  z-index: 500;
  top: -12px;
  width: 8px;
  height: 13px;
  border-radius: 2px;
  pointer-events: none;
  animation: ksconfetti-fall linear forwards;
}
@keyframes ksconfetti-fall {
  to { transform: translateY(105vh) rotate(720deg); opacity: 0.6; }
}

/* ---------- roadmap ---------- */
.ks-tracks { display: grid; gap: var(--s-5); }
.ks-track { border: 1px solid var(--line); border-radius: var(--r-lg); background: linear-gradient(180deg, var(--surface-2), var(--surface)); padding: var(--s-5); }
.ks-track__head { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; margin-bottom: var(--s-4); }
.ks-track__head h3 { margin: 0; font-size: var(--fs-h3); }
.ks-track__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}
.ks-track__ring { margin-left: auto; position: relative; width: 52px; height: 52px; flex: none; }
.ks-track__ring svg { transform: rotate(-90deg); }
.ks-track__ring circle { fill: none; stroke-width: 5; }
.ks-track__ring .bgc { stroke: #222; }
.ks-track__ring .fgc { stroke: var(--ks); stroke-linecap: round; transition: stroke-dashoffset 0.6s var(--ease); }
.ks-track__ring b { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); }

.ks-steps { list-style: none; margin: 0; padding: 0 0 0 1.35rem; position: relative; }
.ks-steps::before {
  content: "";
  position: absolute;
  left: 0.44rem;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 2px;
  background: linear-gradient(var(--line-strong) 60%, transparent 0) top/2px 9px repeat-y;
}
.ks-step { position: relative; padding: 0.45rem 0; }
.ks-step::before {
  content: "";
  position: absolute;
  left: -1.35rem;
  top: 0.82rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background: var(--bg);
  transition: all var(--dur-fast) var(--ease);
}
.ks-step.done::before { background: var(--ks); border-color: var(--ks); box-shadow: 0 0 10px var(--ks-glow); }
.ks-step label { display: flex; gap: 0.7rem; align-items: flex-start; cursor: pointer; }
.ks-step input { position: absolute; opacity: 0; pointer-events: none; }
.ks-step .box {
  flex: none;
  margin-top: 0.18rem;
  width: 17px;
  height: 17px;
  border-radius: 5px;
  border: 1.5px solid var(--line-strong);
  display: grid;
  place-items: center;
  color: transparent;
  transition: all var(--dur-fast) var(--ease);
}
.ks-step.done .box { background: var(--ks); border-color: var(--ks); color: #04120a; }
.ks-step .box svg { width: 11px; height: 11px; }
.ks-step .txt b { display: block; font-size: var(--fs-body); }
.ks-step.done .txt b { color: var(--ks-strong); }
.ks-step .txt small { color: var(--text-dim); font-size: var(--fs-xs); line-height: 1.5; display: block; }
.ks-step .txt a { color: var(--ks); text-decoration: none; }
.ks-step .txt a:hover { text-decoration: underline; }

/* ---------- learn ---------- */
.ks-mod { display: flex; flex-direction: column; gap: 0.8rem; }
.ks-mod__meta { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.ks-pill {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 0.18rem 0.6rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
}
.ks-pill--lvl { color: var(--text-dim); border-color: var(--line-strong); background: transparent; }
.ks-progress { height: 6px; border-radius: 99px; background: #1c1c1c; overflow: hidden; }
.ks-progress i { display: block; height: 100%; width: 0%; border-radius: 99px; background: linear-gradient(90deg, var(--ks-deep), var(--ks-strong)); transition: width 0.5s var(--ease); }
.ks-mod__foot { display: flex; align-items: center; justify-content: space-between; gap: var(--s-2); font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim); }

.ks-lesson { border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); overflow: hidden; }
.ks-lesson + .ks-lesson { margin-top: var(--s-3); }
.ks-lesson > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.95rem 1.1rem;
  user-select: none;
}
.ks-lesson > summary::-webkit-details-marker { display: none; }
.ks-lesson > summary .num {
  flex: none;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}
.ks-lesson[open] > summary, .ks-lesson > summary:hover { background: #161616; }
.ks-lesson > summary b { font-size: var(--fs-body); }
.ks-lesson > summary .mins { margin-left: auto; font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim); flex: none; }
.ks-lesson__body { padding: 0.3rem 1.25rem 1.25rem 3.15rem; color: var(--text-muted); font-size: var(--fs-sm); line-height: var(--lh-body); }
.ks-lesson__body h4 { color: var(--text); margin: 1.1rem 0 0.3rem; font-size: var(--fs-md); }
.ks-lesson__body ul { padding-left: 1.1rem; margin: 0.5rem 0; }
.ks-lesson__body li { margin: 0.3rem 0; }
.ks-lesson__body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: #0d0d0d;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.08em 0.4em;
  color: var(--ks-strong);
}
.ks-lesson__body pre {
  background: #0a0a0a;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: #c9d1d9;
}
.ks-done-row { display: flex; align-items: center; gap: var(--s-3); margin-top: var(--s-4); flex-wrap: wrap; }
.ks-check-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 0.42rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ks-check-btn svg { width: 0.95em; height: 0.95em; }
.ks-check-btn:hover { border-color: var(--ks); color: var(--text); }
.ks-check-btn.is-done { background: rgba(34, 197, 94, 0.12); border-color: var(--ks); color: var(--ks-strong); }

/* ---------- challenges ---------- */
.ks-filter { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: var(--s-5); }
.ks-chipbtn {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: 0.4rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ks-chipbtn:hover { color: var(--text); border-color: var(--line-strong); }
.ks-chipbtn.is-on { color: #04120a; background: var(--ks); border-color: var(--ks); font-weight: 600; }

.ks-ch { display: flex; flex-direction: column; gap: 0.7rem; }
.ks-ch__top { display: flex; align-items: center; gap: 0.5rem; }
.ks-flag-form { display: flex; gap: 0.5rem; }
.ks-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text);
  background: #0d0d0d;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  padding: 0.55rem 0.8rem;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.ks-input:focus { outline: none; border-color: var(--ks); box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15); }
.ks-input::placeholder { color: var(--text-faint); }
.ks-flag-form.ok .ks-input { border-color: var(--ks); }
.ks-flag-form.bad .ks-input { border-color: var(--ks-bad); animation: ksshake 0.3s var(--ease); }
@keyframes ksshake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
.ks-hintbox {
  font-size: var(--fs-xs);
  color: var(--text-dim);
  border-left: 2px solid var(--ks-warn);
  background: rgba(245, 158, 11, 0.06);
  padding: 0.5rem 0.75rem;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.ks-solved-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ks-strong);
}

/* ---------- games ---------- */
.ks-game-tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: var(--s-5); }
.ks-game-panel { display: none; }
.ks-game-panel.is-active { display: block; animation: ksfade 0.35s var(--ease); }
@keyframes ksfade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.ks-game-frame { border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--surface); padding: var(--s-5); }
.ks-game-head { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap; margin-bottom: var(--s-4); }
.ks-game-score { font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--text-muted); display: flex; gap: var(--s-4); flex-wrap: wrap; }
.ks-game-score b { color: var(--ks-strong); }

.ks-console {
  background: #07100a;
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.65;
  padding: var(--s-4);
  height: 320px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.ks-console .p { color: var(--ks-strong); }
.ks-console .dim { color: var(--text-dim); }
.ks-console .ok { color: var(--ks); }
.ks-console .err { color: var(--ks-bad); }
.ks-console .warn { color: var(--ks-warn); }
.ks-console .sys { color: var(--ks-info); }
.ks-term-inputrow { display: flex; gap: 0.5rem; margin-top: var(--s-3); align-items: center; }
.ks-term-inputrow .ps1 { font-family: var(--font-mono); color: var(--ks-strong); white-space: nowrap; }

.ks-word {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: 0.35em;
  text-align: center;
  color: var(--text);
  padding: var(--s-4);
  background: #0d0d0d;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  margin-bottom: var(--s-4);
}
.ks-shift-row { display: flex; align-items: center; justify-content: center; gap: var(--s-3); margin-bottom: var(--s-4); flex-wrap: wrap; }
.ks-shift-val { font-family: var(--font-mono); font-size: 1.2rem; color: var(--ks-strong); min-width: 2.4ch; text-align: center; }
.ks-answer-row { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; }

.ks-ports-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 0.6rem; }
.ks-port-opt {
  font-family: var(--font-mono);
  padding: 0.9rem 0.6rem;
  text-align: center;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ks-port-opt:hover { border-color: var(--ks); transform: translateY(-2px); }
.ks-port-opt.ok { background: rgba(34, 197, 94, 0.15); border-color: var(--ks); }
.ks-port-opt.no { background: rgba(239, 68, 68, 0.12); border-color: var(--ks-bad); }
.ks-port-q { text-align: center; margin-bottom: var(--s-4); }
.ks-port-q .svc { font-family: var(--font-mono); font-size: clamp(1.3rem, 3vw, 1.7rem); color: var(--text); }
.ks-port-q .desc { color: var(--text-dim); font-size: var(--fs-sm); margin-top: 0.3rem; }

.ks-mail {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #0d0d0d;
  padding: var(--s-4);
  font-size: var(--fs-sm);
  line-height: 1.6;
  margin-bottom: var(--s-4);
}
.ks-mail__head { border-bottom: 1px dashed var(--line); padding-bottom: 0.6rem; margin-bottom: 0.7rem; font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim); display: grid; gap: 0.15rem; }
.ks-mail__head b { color: var(--text-muted); }
.ks-verdict-btns { display: flex; gap: 0.6rem; justify-content: center; }
.ks-explain { margin-top: var(--s-3); font-size: var(--fs-xs); color: var(--text-dim); border-left: 2px solid var(--ks-info); background: rgba(96, 165, 250, 0.06); padding: 0.55rem 0.8rem; border-radius: 0 var(--r-sm) var(--r-sm) 0; }

/* ---------- quiz ---------- */
.ks-quiz-domain {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  padding: var(--s-4) var(--s-5);
  display: flex;
  align-items: center;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.ks-quiz-domain h3 { margin: 0; font-size: var(--fs-body); }
.ks-quiz-domain small { color: var(--text-dim); font-family: var(--font-mono); font-size: var(--fs-xs); }
.ks-quiz-domain .ks-best { margin-left: auto; font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--ks-strong); }
.ks-quiz-box { border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--surface); padding: var(--s-5); }
.ks-q-meta { display: flex; justify-content: space-between; gap: var(--s-3); font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim); margin-bottom: var(--s-3); flex-wrap: wrap; }
.ks-q-text { font-size: var(--fs-md); line-height: 1.55; margin: 0 0 var(--s-4); color: var(--text); }
.ks-opt {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface-2);
  color: var(--text-muted);
  padding: 0.8rem 1rem;
  cursor: pointer;
  font-size: var(--fs-sm);
  line-height: 1.5;
  transition: all var(--dur-fast) var(--ease);
  margin-top: 0.55rem;
}
.ks-opt:hover { border-color: var(--ks); color: var(--text); transform: translateX(3px); }
.ks-opt .key {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
}
.ks-opt.is-right { border-color: var(--ks); background: rgba(34, 197, 94, 0.1); color: var(--text); }
.ks-opt.is-right .key { background: var(--ks); color: #04120a; border-color: var(--ks); }
.ks-opt.is-wrong { border-color: var(--ks-bad); background: rgba(239, 68, 68, 0.08); }
.ks-opt.is-wrong .key { background: var(--ks-bad); color: #fff; border-color: var(--ks-bad); }
.ks-quiz-feedback { margin-top: var(--s-4); font-size: var(--fs-xs); line-height: 1.6; color: var(--text-dim); border-left: 2px solid var(--ks); padding-left: 0.8rem; }
.ks-result-big { text-align: center; padding: var(--s-6) 0; }
.ks-result-big .pct { font-family: var(--font-mono); font-size: clamp(2.4rem, 7vw, 3.6rem); color: var(--ks-strong); }
.ks-bar { display: flex; height: 8px; border-radius: 99px; overflow: hidden; background: #1c1c1c; margin: var(--s-3) 0; }
.ks-bar i { display: block; height: 100%; }

/* ---------- shop ---------- */
.ks-shop-hero { display: grid; grid-template-columns: 280px 1fr; gap: var(--s-6); align-items: center; }
.ks-book {
  position: relative;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.8), 0 0 40px -18px var(--ks-glow);
  transform: rotate(-2deg);
  transition: transform var(--dur) var(--ease);
}
.ks-book:hover { transform: rotate(0deg) scale(1.02); }
.ks-book img { display: block; width: 100%; height: auto; }
.ks-price { font-family: var(--font-mono); font-size: 2rem; color: var(--ks-strong); }
.ks-price s { color: var(--text-faint); font-size: 1.1rem; margin-left: 0.5rem; }
.ks-feat { list-style: none; margin: var(--s-4) 0; padding: 0; display: grid; gap: 0.5rem; font-size: var(--fs-sm); color: var(--text-muted); }
.ks-feat li { display: flex; gap: 0.55rem; align-items: flex-start; }
.ks-feat svg { flex: none; width: 1em; height: 1em; color: var(--ks); margin-top: 0.2em; }
.ks-badge-soon {
  position: absolute;
  top: 12px;
  right: -30px;
  transform: rotate(38deg);
  background: var(--text-dim);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.28rem 2.2rem;
}

/* ---------- modal ---------- */
.ks-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 450;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--s-4);
}
.ks-modal-backdrop.is-open { display: flex; animation: ksfade 0.25s var(--ease); }
.ks-modal {
  width: min(560px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: var(--s-5);
}
.ks-modal h3 { margin: 0 0 0.6rem; display: flex; align-items: center; gap: 0.55rem; }
.ks-modal h3 svg { width: 1.1em; height: 1.1em; color: var(--ks); }
.ks-paylist { display: grid; gap: 0.6rem; margin: var(--s-4) 0; }
.ks-payopt {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 0.85rem 1rem;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: all var(--dur-fast) var(--ease);
}
.ks-payopt:hover { border-color: var(--ks); color: var(--text); transform: translateY(-2px); }
.ks-payopt svg { width: 1.2em; height: 1.2em; color: var(--ks); flex: none; }
.ks-close-x {
  float: right;
  background: none;
  border: 1px solid var(--line);
  color: var(--text-dim);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  cursor: pointer;
}
.ks-close-x:hover { color: var(--text); border-color: var(--line-strong); }

/* ---------- misc ---------- */
.ks-note {
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  padding: var(--s-4);
  font-size: var(--fs-sm);
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  gap: 0.7rem;
}
.ks-note svg { flex: none; width: 1.1em; height: 1.1em; color: var(--ks); margin-top: 0.15em; }
.ks-backlink {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim);
  text-decoration: none;
  margin-bottom: var(--s-4);
}
.ks-backlink:hover { color: var(--ks); }
.ks-backlink svg { width: 0.9em; height: 0.9em; }
.ks-badges { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.ks-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  border: 1px solid var(--line);
  color: var(--text-faint);
  border-radius: var(--r-pill);
  padding: 0.35rem 0.8rem;
}
.ks-badge svg { width: 1em; height: 1em; }
.ks-badge.won { color: var(--text-muted); border-color: var(--line-strong); background: rgba(255, 255, 255, 0.03); }
.ks-footer-strip {
  border-top: 1px solid var(--line);
  margin-top: var(--s-8);
  padding: var(--s-5) var(--s-4);
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-faint);
}
.ks-footer-strip a { color: var(--ks); text-decoration: none; }
.ks-footer-strip a:hover { text-decoration: underline; }

@media (max-width: 860px) {
  .ks-hero { grid-template-columns: 1fr; }
  .ks-shop-hero { grid-template-columns: 1fr; }
  .ks-book { max-width: 240px; margin: 0 auto; }
  .ks-lesson__body { padding-left: 1.25rem; }
}

/* ==========================================================================
   Compat layer - component classes used by challenges/games/secplus/shop/
   about pages that were authored after the original stylesheet.
   ========================================================================== */
.ks-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--s-4);
}
.ks-tabbtn {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: 0.5rem 0.9rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all var(--dur-fast) var(--ease);
}
.ks-tabbtn:hover { color: var(--text); border-color: var(--line-strong); }
.ks-tabbtn.is-on {
  color: var(--bg);
  background: var(--ks);
  border-color: var(--ks);
}
.ks-panel { animation: ksfade 0.25s var(--ease); }

.ks-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
  padding: var(--s-5) var(--s-4);
}
.ks-result b { font-size: var(--fs-lg); }
.ks-result span { color: var(--muted); font-family: var(--font-mono); font-size: var(--fs-sm); }

.ks-optgrid,
.ks-quizopts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
}
.ks-quizopts { grid-template-columns: 1fr; }
.ks-qopt { justify-content: flex-start; text-align: left; font-size: var(--fs-sm); }
.ks-qopt.is-picked { border-color: var(--ks); color: var(--text); box-shadow: 0 0 0 1px var(--ks) inset; }
.ks-qopt.is-right { border-color: var(--ks); color: var(--ks-strong); }
.ks-qopt.is-wrong { border-color: #f87171; color: #f87171; }
.ks-qopt:disabled { opacity: 0.75; cursor: default; }

.ks-dotbtn {
  width: 28px;
  height: 28px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ks-dotbtn:hover { border-color: var(--line-strong); color: var(--text); }
.ks-dotbtn.answered { border-color: var(--ks-deep); color: var(--ks-strong); }
.ks-dotbtn.current { background: var(--ks); border-color: var(--ks); color: var(--bg); }

.ks-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}
.ks-table th, .ks-table td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--line);
}
.ks-table th {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
.ks-table td b { color: var(--ks-strong); }

.ks-scorechips { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.ks-plan { margin: 0; padding-left: 1.2rem; display: grid; gap: 0.6rem; color: var(--muted); font-size: var(--fs-sm); }
.ks-plan li::marker { color: var(--ks); font-family: var(--font-mono); }
.ks-plan b { color: var(--text); }

.ks-checklist { list-style: none; margin: 0.75rem 0; padding: 0; display: grid; gap: 0.45rem; font-size: var(--fs-sm); color: var(--text-dim); }
.ks-checklist li { position: relative; padding-left: 1.4rem; }
.ks-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--text-dim);
}
.ks-checklist b { color: var(--text); }

.ks-shop-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-5);
  align-items: center;
  background: linear-gradient(165deg, #121212, #0b0b0b);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-5);
}
@media (max-width: 720px) { .ks-shop-hero { grid-template-columns: 1fr; } }
.ks-shop-cover {
  position: relative;
  width: 240px;
  max-width: 100%;
  aspect-ratio: 3 / 4;
  min-height: 300px;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.ks-shop-cover:hover { transform: translateY(-3px); box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55); }
.ks-shop-cover img { display: block; width: 100%; height: auto; }
.ks-shop-info p { font-size: var(--fs-sm); line-height: 1.7; }
.ks-buyrow { display: flex; align-items: center; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.1rem; }
.ks-price { font-family: var(--font-display); font-size: var(--fs-xl); color: var(--ks-strong); }

.ks-payopts { display: grid; gap: 0.6rem; margin: 1rem 0; }
.ks-payopt {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  align-items: flex-start;
  text-align: left;
}
.ks-payopt small { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--muted); }

.ks-modal-x {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--text-dim);
  width: 32px;
  height: 32px;
  font-size: var(--fs-lg);
  line-height: 1;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ks-modal-x:hover { color: var(--text); border-color: var(--line-strong); }

/* shop modal uses hidden attr + .show instead of .is-open */
.ks-modal-backdrop[hidden] { display: none !important; }
.ks-modal-backdrop.show { display: flex; animation: ksfade 0.2s var(--ease); }

.ks-chipbtn.is-on { color: var(--bg); background: var(--ks); border-color: var(--ks); }

.ks-flag-form.ok .ks-input { border-color: var(--ks); color: var(--ks-strong); }
.ks-flag-form.bad .ks-input { border-color: #f87171; animation: ksshake 0.3s ease; }
@keyframes ksshake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.ks-solved-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ks-strong);
}

.ks-cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.ks-page .reveal { opacity: 1; }
.ks-page .reveal.in-view { opacity: 1; transform: none; }

.ks-h2 {
  font-family: var(--font-sans);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  margin: 0 0 0.5rem;
}

.ks-btn--lg {
  padding: 0.85rem 1.6rem;
  font-size: var(--fs-base);
}

/* ==========================================================================
   Store — catalog grid, product cards, covers, trust row
   Category accents: ebook=green (--ks) · course=blue (--ks-info) · tool=amber (--ks-warn)
   ========================================================================== */

.ks-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem var(--s-5);
  margin: var(--s-5) 0 0;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.02);
}
.ks-trust span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted, var(--muted));
}
.ks-trust svg { width: 1em; height: 1em; color: var(--text-dim); flex: none; }

.ks-shopfilters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: var(--s-6) 0 var(--s-4);
}
.ks-shopshead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
}
.ks-shopshead .ks-count { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim, var(--muted)); }
section[id] { scroll-margin-top: 1.5rem; }
.ks-shopfilters .ks-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim, var(--muted));
}

.ks-shopgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(235px, 100%), 1fr));
  gap: var(--s-4);
}

.ks-prod {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, #121212, #0b0b0b);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ks-prod:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}
.ks-prod[data-cat="ebook"] { --pc: #22c55e; }
.ks-prod[data-cat="course"] { --pc: #60a5fa; }
.ks-prod[data-cat="tool"] { --pc: #f59e0b; }

.ks-prod__cover {
  position: relative;
  aspect-ratio: 3 / 4;
  min-height: 240px;
  overflow: hidden;
  background: #0a0f0c;
  border-bottom: 1px solid var(--line);
}
.ks-prod__cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s var(--ease);
}
.ks-prod:hover .ks-prod__cover img { transform: scale(1.045); }

.ks-prod__status {
  position: absolute;
  top: 10px;
  right: 10px;
  left: auto;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  color: var(--text-muted);
  background: transparent;
}
.ks-prod__status--live { color: var(--text-muted); border-color: var(--line-strong); }
.ks-prod__status--soon { color: var(--text-dim); border-color: var(--line); }
.ks-prod__status--feat { top: auto; bottom: 10px; left: auto; right: 10px; color: var(--text-muted); border: 1px solid var(--line-strong); background: transparent; }
.ks-prod--soon .ks-prod__cover img { filter: grayscale(0.5) opacity(0.85); transition: filter 0.25s ease; }
.ks-prod--soon:hover .ks-prod__cover img { filter: none; }

.ks-prod__body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  padding: 0.9rem 1rem 1.05rem;
}
.ks-prod__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.ks-prod h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 1.3;
  letter-spacing: var(--tracking-tight);
}
.ks-prod p {
  margin: 0;
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--text-muted, var(--muted));
  flex: 1;
}
.ks-prod__refs {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint, var(--muted));
}
.ks-prod__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-top: 0.55rem;
}
.ks-price-sm {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}
.ks-price-sm small { display: block; font-size: 11px; font-weight: 400; color: var(--text-faint, var(--muted)); }
.ks-prod .ks-btn { padding: 0.5rem 0.95rem; font-size: var(--fs-xs); white-space: normal; min-width: 0; max-width: 100%; text-align: center; }

@media (max-width: 540px) {
  .ks-shopgrid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--s-3); }
  .ks-prod__body { padding: 0.75rem 0.8rem 0.9rem; }
  .ks-prod p { display: none; }
  .ks-prod__cover { min-height: 180px; }
  .ks-prod__row { flex-direction: column; align-items: stretch; }
  .ks-prod__row .ks-btn { width: 100%; }
  .ks-prod__row .ks-price-sm small { display: inline; margin-left: 0.35rem; }
}

/* delivery steps + faq reuse .ks-steps / .ks-note / details styling */
.ks-storefaq { display: grid; gap: 0.7rem; margin-top: var(--s-4); }
.ks-storefaq details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.85rem 1.05rem;
}
.ks-storefaq summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.ks-storefaq summary::before { content: '+'; color: var(--ks); font-weight: 700; width: 1em; }
.ks-storefaq details[open] summary::before { content: '\2013'; }
.ks-storefaq details p { margin: 0.6rem 0 0.15rem; font-size: var(--fs-sm); color: var(--text-muted, var(--muted)); line-height: 1.7; }

/* ==========================================================================
   HOMEPAGE REDESIGN — v8
   Scoped under .ks-home to avoid conflicts with other KaySociety pages.
   ========================================================================== */

/* --- base --- */
.ks-home {
  --ks-home-section-pad: 7rem;
  --ks-home-gap: 1.25rem;
  font-family: "Inter", var(--font-sans);
}

/* --- hide duplicate site-footer on homepage --- */
.ks-page.ks-home ~ .site-footer { display: none; }

/* --- navbar glassmorphism override --- */
.ks-page .header-shell {
  background: rgba(8, 8, 8, 0.72);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
}

/* --- section spacing --- */
.ks-home-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--ks-home-section-pad) var(--s-4) 0;
}

/* --- section heads --- */
.ks-home-section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
  margin-bottom: var(--s-5);
}
.ks-home-section__head h2 {
  font-family: "Inter", var(--font-sans);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--text);
  margin: 0;
}
.ks-home-more {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim);
}
.ks-home-more:hover { color: var(--ks); }

/* ==========================================================================
   HERO
   ========================================================================== */
.ks-home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--s-6);
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--s-6) var(--s-4) 0;
}

.ks-home-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-dim);
}
.ks-home-kicker svg { width: 1em; height: 1em; }

.ks-home-h1 {
  font-family: "Inter", var(--font-sans);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0.9rem 0 0.8rem;
  color: var(--text);
}
.ks-home-h1 .grad {
  background: linear-gradient(92deg, var(--ks) 10%, var(--ks-strong) 55%, #a7f3d0 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ks-home-sub {
  color: var(--text-muted);
  font-size: var(--fs-md);
  max-width: 52ch;
  margin: 0;
  line-height: var(--lh-body);
}

/* --- hero CTAs --- */
.ks-home-cta {
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
  margin-top: var(--s-5);
}
.ks-home-cta .ks-btn--ghost {
  border-color: var(--line-strong);
  color: var(--text);
}

/* --- stat bar --- */
.ks-home-stats {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: var(--s-6);
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.ks-home-stat {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0 var(--s-5);
  border-right: 1px solid var(--line);
}
.ks-home-stat:last-child { border-right: none; }
.ks-home-stat:first-child { padding-left: 0; }
.ks-home-stat:last-child { padding-right: 0; }
.ks-home-stat b {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.ks-home-stat span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text-dim);
}

/* ==========================================================================
   TERMINAL — macOS chrome + scanline
   ========================================================================== */
.ks-term {
  background: #070b08;
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 14px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(34, 197, 94, 0.08),
    0 40px 100px -40px rgba(34, 197, 94, 0.2),
    0 0 80px -30px rgba(34, 197, 94, 0.1);
  position: relative;
}
.ks-term::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.012) 0px,
    rgba(255, 255, 255, 0.012) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 1;
}
.ks-term__bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1rem;
  background: #0a100c;
  border-bottom: 1px solid rgba(34, 197, 94, 0.15);
  position: relative;
}
.ks-term__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #1a2420;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.ks-term__dot--g { background: #22c55e; border-color: rgba(34, 197, 94, 0.4); }
.ks-term__dot--y { background: #f59e0b; border-color: rgba(245, 158, 11, 0.4); }
.ks-term__dot--r { background: #ef4444; border-color: rgba(239, 68, 68, 0.4); }
.ks-term__title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim);
  letter-spacing: 0.02em;
}
.ks-term__body {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  padding: var(--s-4);
  min-height: 240px;
  white-space: pre-wrap;
  word-break: break-word;
  position: relative;
  z-index: 2;
}
.ks-term__body .ln-prompt { color: var(--ks-strong); }
.ks-term__body .ln-out { color: var(--text-muted); }
.ks-term__body .ln-ok { color: var(--ks); }
.ks-caret {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  background: var(--ks);
  vertical-align: text-bottom;
  animation: caretBlink 1s step-end infinite;
}

/* ==========================================================================
   FEATURE GRID — bento (4 cards)
   ========================================================================== */
.ks-home-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--ks-home-gap);
}

.ks-home-feat {
  position: relative;
  display: flex;
  flex-direction: column;
  background: linear-gradient(165deg, #111111, #0a0a0a);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-5);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
  overflow: hidden;
}
.ks-home-feat::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(120% 60% at 50% 0%, rgba(34, 197, 94, 0.06), transparent 70%);
  transition: opacity 200ms var(--ease);
}
.ks-home-feat:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 197, 94, 0.3);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6), 0 0 40px -20px rgba(34, 197, 94, 0.12);
}
.ks-home-feat:hover::before { opacity: 1; }

.ks-home-feat__icon {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0d0d0d;
  color: var(--text-muted);
  margin-bottom: var(--s-4);
  position: relative;
  z-index: 1;
}
.ks-home-feat__icon svg { width: 22px; height: 22px; }

.ks-home-feat h3 {
  margin: 0 0 0.4rem;
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--text);
  position: relative;
  z-index: 1;
}
.ks-home-feat p {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-sm);
  line-height: var(--lh-body);
  flex: 1;
  position: relative;
  z-index: 1;
}

.ks-home-feat__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: var(--s-4);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-dim);
  position: relative;
  z-index: 1;
  transition: color 180ms var(--ease);
}
.ks-home-feat__link svg {
  width: 0.9em;
  height: 0.9em;
  transition: transform 180ms var(--ease);
}
.ks-home-feat:hover .ks-home-feat__link { color: var(--text); }
.ks-home-feat:hover .ks-home-feat__link svg { transform: translate(4px); }

/* ==========================================================================
   HOW IT WORKS — ghosted numbers + connector
   ========================================================================== */
.ks-home-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--ks-home-gap);
  position: relative;
}

.ks-home-step {
  position: relative;
  padding: var(--s-5);
  background: linear-gradient(165deg, #111111, #0a0a0a);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}
.ks-home-step:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.ks-home-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.04);
  margin-bottom: var(--s-3);
  letter-spacing: -0.02em;
  user-select: none;
}

.ks-home-step h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--text);
}
.ks-home-step p {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-sm);
  line-height: var(--lh-body);
}
.ks-home-step p a { color: var(--ks); text-decoration: none; }
.ks-home-step p a:hover { text-decoration: underline; }

/* connector arrows between steps on desktop */
.ks-home-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--line-strong);
  z-index: 2;
}

/* ==========================================================================
   BADGES — card + lock/unlock chips
   ========================================================================== */
.ks-home-badges-card {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-5);
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(ellipse 70% 50% at 20% 0%, rgba(34, 197, 94, 0.06), transparent 60%),
    linear-gradient(165deg, #111111, #0a0a0a);
  padding: var(--s-6);
}

.ks-home-badges-card__body { max-width: 520px; }
.ks-home-badges-card__body h3 {
  margin: 0 0 0.4rem;
  font-size: var(--fs-h3);
  color: var(--text);
}
.ks-home-badges-card__body p {
  margin: 0;
  color: var(--text-dim);
  font-size: var(--fs-sm);
}

.ks-home-badges-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.ks-home-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  border: 1px solid var(--line);
  color: var(--text-faint);
  border-radius: var(--r-pill);
  padding: 0.4rem 0.85rem;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease);
}
.ks-home-badge svg { width: 0.9em; height: 0.9em; flex-shrink: 0; }
.ks-home-badge:hover { border-color: var(--line-strong); color: var(--text-dim); }
.ks-home-badge.won {
  color: var(--ks-strong);
  border-color: rgba(34, 197, 94, 0.35);
  background: rgba(34, 197, 94, 0.06);
  box-shadow: 0 0 20px -8px rgba(34, 197, 94, 0.15);
}
.ks-home-badge.won svg { display: none; }
.ks-home-badge.won::before {
  content: "\2713";
  display: inline-block;
  width: 1em;
  text-align: center;
}

.ks-home-badges-card__actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* --- badge modal --- */
.ks-home-modal {
  position: fixed;
  inset: 0;
  z-index: 450;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-4);
}
.ks-home-modal[hidden] { display: none !important; }
.ks-home-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  cursor: pointer;
}
.ks-home-modal__box {
  position: relative;
  width: min(540px, 100%);
  max-height: 80vh;
  overflow-y: auto;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  animation: ksfade 0.25s var(--ease);
}
.ks-home-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: var(--s-4);
}
.ks-home-modal__head h3 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-md);
}
.ks-home-modal__head h3 svg { width: 1.1em; height: 1.1em; color: var(--ks); }
.ks-home-modal__x {
  background: none;
  border: 1px solid var(--line);
  color: var(--text-dim);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.ks-home-modal__x:hover { color: var(--text); border-color: var(--line-strong); }
.ks-home-modal__body p {
  margin: 0 0 0.6rem;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-body);
}
.ks-home-modal__body ul {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  line-height: 1.7;
}
.ks-home-modal__body li { margin: 0.3rem 0; }
.ks-home-modal__body strong { color: var(--text); }
.ks-home-modal__body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: #0d0d0d;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.08em 0.4em;
  color: var(--ks-strong);
}

/* ==========================================================================
   SHOP — featured conversion section
   ========================================================================== */
.ks-home-shop {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(ellipse 60% 50% at 80% 10%, rgba(34, 197, 94, 0.07), transparent 55%),
    linear-gradient(165deg, #111111, #0a0a0a);
  padding: var(--s-6);
  text-align: center;
}
.ks-home-shop__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0.2rem 0.7rem;
  margin-bottom: var(--s-3);
}
.ks-home-shop__title {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--text);
}
.ks-home-shop__desc {
  margin: 0 auto var(--s-5);
  color: var(--text-dim);
  font-size: var(--fs-sm);
  max-width: 48ch;
  line-height: var(--lh-body);
}
.ks-home-shop__covers {
  display: flex;
  justify-content: center;
  gap: var(--s-4);
  margin-bottom: var(--s-5);
  flex-wrap: wrap;
}
.ks-home-shop__cover {
  display: block;
  width: 120px;
  border-radius: var(--r-sm);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}
.ks-home-shop__cover:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}
.ks-home-shop__cover img { display: block; width: 100%; height: auto; }
.ks-home-shop__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
}
.ks-home-shop__hint {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-faint);
}

/* ==========================================================================
   FOOTER — single merged block
   ========================================================================== */
.ks-home-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--s-8) var(--s-4) var(--s-6);
  border-top: 1px solid var(--line);
}
.ks-home-footer__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
}
.ks-home-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ks-home-footer__logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--line);
}
.ks-home-footer__name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.ks-home-footer__sep {
  color: var(--text-faint);
  font-size: 0.8rem;
}
.ks-home-footer__parent {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim);
}
.ks-home-footer__parent a { color: var(--ks); text-decoration: none; }
.ks-home-footer__parent a:hover { text-decoration: underline; }

.ks-home-footer__social {
  display: flex;
  gap: 0.35rem;
}
.ks-home-footer__social a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 0.3rem 0.65rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}
.ks-home-footer__social a:hover {
  color: var(--text);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}
.ks-home-footer__social svg { width: 14px; height: 14px; flex-shrink: 0; }

.ks-home-footer__trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: var(--s-4) 0 var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--s-3);
}
.ks-home-footer__trust svg { color: var(--text-dim); flex-shrink: 0; }

.ks-home-footer__legal {
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-faint);
}
.ks-home-footer__legal a { color: var(--text-dim); text-decoration: none; }
.ks-home-footer__legal a:hover { color: var(--text); text-decoration: underline; }

/* ==========================================================================
   HOMEPAGE RESPONSIVE
   ========================================================================== */

/* tablet: ≤1024px */
@media (max-width: 1024px) {
  .ks-home-features { grid-template-columns: repeat(2, 1fr); }
}

/* mobile: ≤768px */
@media (max-width: 768px) {
  .ks-home { --ks-home-section-pad: 4.5rem; }
  .ks-home-hero {
    grid-template-columns: 1fr;
    gap: var(--s-5);
    padding-top: var(--s-5);
  }
  .ks-home-hero__terminal { order: 2; width: 100%; }
  .ks-home-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    border: none;
    padding: 0;
  }
  .ks-home-stat {
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    padding: 0.6rem 0.8rem;
    justify-content: center;
  }
  .ks-home-features { grid-template-columns: 1fr; }
  .ks-home-steps { grid-template-columns: 1fr; }
  .ks-home-step:not(:last-child)::after { display: none; }
  .ks-home-badges-card { flex-direction: column; align-items: flex-start; padding: var(--s-5); }
  .ks-home-footer__row { flex-direction: column; align-items: center; text-align: center; }
  .ks-home-footer__brand { justify-content: center; }
  .ks-home-footer__social { justify-content: center; flex-wrap: wrap; }
}

/* small mobile: ≤480px */
@media (max-width: 480px) {
  .ks-home { --ks-home-section-pad: 3rem; }
  .ks-home-h1 { font-size: clamp(1.6rem, 8vw, 2.2rem); }
  .ks-home-section { padding-left: var(--s-3); padding-right: var(--s-3); }
  .ks-home-hero { padding-left: var(--s-3); padding-right: var(--s-3); }
  .ks-home-footer { padding-left: var(--s-3); padding-right: var(--s-3); }
  .ks-home-shop { padding: var(--s-4); }
  .ks-home-shop__cover { width: 90px; }
  .ks-home-badges-card { padding: var(--s-4); }
  .ks-home-footer__social a span { display: none; }
  .ks-home-footer__social a { padding: 0.4rem; }
}

/* phones: readable small text + comfy tap targets */
@media (max-width: 480px) {
  .ks-kicker, .ks-pill, .ks-chipbtn, .ks-tabbtn, .ks-backlink,
  .ks-trust span, .ks-shopshead .ks-count, .ks-shopfilters .ks-count,
  .ks-footer-strip, .ks-home-footer__trust, .ks-home-footer__legal,
  .ks-price-sm small, .ks-solved-tag, .ks-prod__status, .ks-prod__cat,
  .ks-mod__foot, .ks-mod__meta, .ks-hintbox, .ks-track__tag, .ks-step .txt small,
  .kcf-overall__label, .kcf-mod__num, .kcf-chip,
  .ks-home-kicker, .ks-term__title, .ks-ticker__track, .ks-home-more,
  .ks-home-badge, .ks-home-stat span, .ks-home-shop__label, .ks-home-shop__hint { font-size: 12px; }
  .ks-btn, .ks-prod .ks-btn { font-size: 12px; }
  .ks-btn small { font-size: 12px; }
  .ks-btn, .ks-chipbtn, .ks-tabbtn { min-height: 40px; }
  .ks-backlink { padding: 0.8rem 0.5rem 0.8rem 0; }
  .ks-lesson > summary, .ks-storefaq summary { min-height: 44px; }
  .ks-ch details, .ks-ch details summary { font-size: 12px; }
  .ks-ch details summary { min-height: 34px; }
  .ks-hud { font-size: 12px; }
  .ks-step .txt a { font-size: 12px; padding: 0.2rem 0 0.2rem 0.15rem; }
}
@media (max-width: 380px) {
  .ks-wrap { padding-left: var(--s-3); padding-right: var(--s-3); }
  .ks-lesson__top, .ks-ch__top, .ks-mod__meta { flex-wrap: wrap; }
  .ks-shopshead { justify-content: center; }
  .ks-shopfilters { justify-content: center; }
}

/* fixed XP HUD: give the page bottom a buffer so the last cards/footer can
   scroll clear of the pinned stats bar instead of being covered by it. */
@media (max-width: 600px) {
  body { padding-bottom: 92px; }
}