/* ============================================================
   KCT v4 — DESIGN BEYOND THE EXPECTED
   Curiosity → Discovery → Understanding. For Minh.
   ============================================================ */

/* ---------- HERO v4: human questions ---------- */
.hero-q-label{
  font-family:var(--sans);font-size:.95rem;letter-spacing:.06em;
  color:#f0e4c9;margin:34px 0 14px;text-shadow:0 1px 12px rgba(15,8,4,.6);
}
.hero-questions{display:flex;flex-wrap:wrap;gap:10px;max-width:700px;margin-bottom:30px}
.hero-questions button{
  border:1px solid rgba(253,248,236,.32);background:rgba(20,12,8,.28);
  border-radius:999px;padding:11px 22px;color:#fdf8ec;cursor:pointer;
  font-size:.92rem;font-family:var(--sans);transition:all var(--t-med) var(--ease);
  backdrop-filter:blur(4px);
}
.hero-questions button:hover{border-color:#e8c86a;color:#e8c86a;transform:translateY(-2px);background:rgba(20,12,8,.42)}
.hero .hero-search{margin-top:6px}

/* ---------- KHÁM PHÁ HÔM NAY ---------- */
.daily-card{
  display:grid;grid-template-columns:1fr 1.2fr;gap:0;max-width:980px;margin:0 auto;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
}
.daily-visual{min-height:320px;overflow:hidden;background:var(--paper-3)}
.daily-visual img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.daily-card:hover .daily-visual img{transform:scale(1.02)}
.daily-body{padding:clamp(28px,4vw,48px);display:flex;flex-direction:column;justify-content:center}
.daily-body h3{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:14px;line-height:1.3}
.daily-body p{color:var(--ink-soft);line-height:1.8;font-size:1.02rem}
@media(max-width:760px){.daily-card{grid-template-columns:1fr}.daily-visual{min-height:220px}}

/* ---------- CURIOSITY ENGINE ---------- */
.curiosity-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:8px}
.cq{
  border:1px solid var(--line);background:var(--card);border-radius:999px;
  padding:14px 26px;font-size:1rem;font-family:var(--serif-b);color:var(--ink);
  cursor:pointer;transition:all var(--t-med) var(--ease);
}
.cq:hover{border-color:var(--maroon);color:var(--maroon);transform:translateY(-3px);box-shadow:0 12px 28px rgba(80,60,30,.12)}
.cq:active{transform:translateY(-1px)}

/* ---------- HÀNH TRÌNH KHÁM PHÁ — chapters ---------- */
.chapters{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
.chapter{
  display:grid;grid-template-columns:90px minmax(0,1fr) auto;gap:28px;align-items:center;
  padding:32px 12px;border-bottom:1px solid var(--line);
  transition:background var(--t-med) var(--ease),padding var(--t-med) var(--ease);
}
.chapter:hover{background:var(--card);padding-left:24px}
.ch-num{font-family:var(--serif-d);font-size:2.2rem;color:var(--gold);line-height:1}
.ch-kicker{display:block;font-family:var(--sans);font-size:.7rem;font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--maroon);margin-bottom:8px}
.ch-title{display:block;font-family:var(--serif-d);font-weight:600;font-size:clamp(1.4rem,2.8vw,1.9rem);color:var(--ink);line-height:1.3;margin-bottom:8px}
.ch-desc{display:block;font-size:.96rem;color:var(--ink-soft);line-height:1.7}
.ch-meta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;font-family:var(--sans);font-size:.82rem;color:var(--ink-faint);white-space:nowrap}
.ch-go{color:var(--maroon);letter-spacing:.08em}
.ch-go .arr{display:inline-block;color:var(--gold);transition:transform var(--t-med) var(--ease)}
.chapter:hover .ch-go .arr{transform:translateX(8px)}
@media(max-width:640px){
  .chapter{grid-template-columns:56px 1fr;gap:18px}
  .ch-num{font-size:1.6rem}
  .ch-meta{grid-column:2;flex-direction:row;align-items:center;justify-content:space-between}
}

/* ---------- MAP MODES ---------- */
.map-modes{display:flex;gap:10px;margin:4px 0 22px}
.map-modes button{
  border:1px solid rgba(216,180,92,.4);background:transparent;color:#c9b998;
  border-radius:999px;padding:10px 24px;font-size:.86rem;font-family:var(--sans);
  cursor:pointer;letter-spacing:.06em;transition:all var(--t-med) var(--ease);
}
.map-modes button.on{background:#e8c86a;border-color:#e8c86a;color:#1d1410;font-weight:600}
.map-modes button:not(.on):hover{border-color:#e8c86a;color:#e8c86a}
.map-hint{font-family:var(--sans);font-size:.82rem;color:#8f7c58;margin-top:14px;font-style:italic}
.me-node.type-hub .me-ring{stroke:#e8c86a;stroke-width:2;fill:rgba(232,200,106,.14);stroke-dasharray:none}
.me-node.type-hub .me-label{font-size:12px;letter-spacing:.14em}
.me-node.is-hidden{display:none}
.me-edge.is-hidden{display:none}

/* ---------- DISCOVERY PATH overlay ---------- */
.path-overlay{
  position:fixed;inset:0;z-index:1100;background:rgba(29,20,16,.72);
  backdrop-filter:blur(6px);display:none;overflow:auto;padding:6vh clamp(16px,4vw,40px);
}
.path-overlay.open{display:block}
.path-card{
  max-width:760px;margin:0 auto;background:var(--paper);border-radius:20px;
  overflow:hidden;box-shadow:0 40px 120px rgba(0,0,0,.4);
  animation:pathIn var(--t-slow) var(--ease);
}
@keyframes pathIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.path-card{animation:none}}
.path-head{position:relative;padding:clamp(30px,5vw,50px) clamp(24px,5vw,54px) 8px}
.path-head .kicker{margin-bottom:12px}
.path-head h2{font-size:clamp(1.7rem,4vw,2.5rem);line-height:1.25;margin-bottom:6px}
.path-close{position:absolute;top:18px;right:18px}
.path-visual{margin:18px 0 6px;border-radius:14px;overflow:hidden;aspect-ratio:16/8;background:var(--paper-3)}
.path-visual img{width:100%;height:100%;object-fit:cover}
.path-steps{padding:10px clamp(24px,5vw,54px) clamp(30px,5vw,50px)}
.pstep{display:grid;grid-template-columns:52px minmax(0,1fr);gap:20px;padding:26px 0;border-top:1px solid var(--line-soft)}
.pstep:first-child{border-top:0}
.pstep .pn{font-family:var(--serif-d);font-size:1.1rem;color:var(--gold);line-height:1.4}
.pstep .pn small{display:block;font-family:var(--sans);font-size:.66rem;letter-spacing:.22em;color:var(--ink-faint);margin-top:4px}
.pstep .pbody p{color:var(--ink-soft);line-height:1.85;font-size:1.02rem}
.pstep .pbody .concept-chip{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);
  background:var(--card);border-radius:999px;padding:10px 20px;font-family:var(--sans);
  font-size:.9rem;color:var(--maroon);cursor:pointer;transition:all var(--t-fast) var(--ease);margin-top:4px;
}
.pstep .pbody .concept-chip:hover{border-color:var(--maroon);transform:translateY(-2px)}
.pstep .deep-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px 24px;transition:all var(--t-med) var(--ease)}
.pstep .deep-card:hover{border-color:var(--maroon);transform:translateY(-2px);box-shadow:var(--shadow)}
.pstep .deep-card b{font-family:var(--serif-d);font-size:1.2rem;color:var(--ink);display:block;margin-bottom:6px}
.pstep .deep-card span{font-family:var(--sans);font-size:.86rem;color:var(--maroon)}
.pstep .next-qs{display:flex;flex-wrap:wrap;gap:10px}
.pstep .next-qs button{
  border:1px solid var(--line);background:transparent;border-radius:999px;
  padding:10px 20px;font-size:.9rem;font-family:var(--serif-b);color:var(--ink-soft);
  cursor:pointer;transition:all var(--t-fast) var(--ease);
}
.pstep .next-qs button:hover{border-color:var(--gold);color:var(--maroon)}
.path-note{
  margin:6px clamp(24px,5vw,54px) clamp(28px,5vw,48px);padding:18px 22px;
  background:var(--paper-2);border-left:3px solid var(--gold);border-radius:0 12px 12px 0;
  font-family:var(--sans);font-size:.86rem;color:var(--ink-soft);line-height:1.7;
}
@media(max-width:640px){
  .path-overlay{padding:0}
  .path-card{border-radius:0;min-height:100vh}
  .pstep{grid-template-columns:40px 1fr;gap:14px}
}

/* ---------- ARTICLE v4 ---------- */
.summary30{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:0 14px 14px 0;padding:20px 24px;margin:26px 0}
.summary30 .kicker{margin-bottom:8px;font-size:.7rem}
.summary30 p{font-size:1rem;color:var(--ink-soft);line-height:1.8;margin:0}
.ask-next{margin:64px 0 8px}
.ask-next h3{font-size:1.5rem;margin-bottom:6px}
.ask-next .sub{font-family:var(--sans);font-size:.86rem;color:var(--ink-faint);margin-bottom:20px}
.ask-q{
  display:flex;align-items:center;gap:16px;width:100%;text-align:left;
  background:transparent;border:0;border-bottom:1px solid var(--line-soft);
  padding:20px 6px;font-family:var(--serif-b);font-size:1.12rem;color:var(--ink);
  cursor:pointer;transition:all var(--t-med) var(--ease);
}
.ask-q:first-of-type{border-top:1px solid var(--line-soft)}
.ask-q:hover{color:var(--maroon);padding-left:14px;background:var(--card)}
.ask-q .arr{margin-left:auto;color:var(--gold);font-family:var(--sans);flex:none;transition:transform var(--t-med) var(--ease)}
.ask-q:hover .arr{transform:translateX(6px)}
.your-journey{margin:56px 0 8px;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--radius);padding:clamp(26px,4vw,44px)}
.your-journey h3{font-size:1.5rem;margin-bottom:8px}
.yj-you{font-family:var(--sans);font-size:.95rem;color:var(--ink-soft);margin-bottom:22px}
.yj-you b{font-family:var(--serif-d);color:var(--maroon);font-size:1.05rem}
.yj-paths{display:grid;gap:12px}
@media(min-width:700px){.yj-paths{grid-template-columns:repeat(3,1fr)}}
.yj-path{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:20px;transition:all var(--t-med) var(--ease);
}
.yj-path:hover{border-color:var(--maroon);transform:translateY(-3px);box-shadow:var(--shadow)}
.yj-path small{display:block;font-family:var(--sans);font-size:.68rem;font-weight:600;letter-spacing:.24em;color:var(--gold);margin-bottom:8px;text-transform:uppercase}
.yj-path b{font-family:var(--serif-d);font-size:1.08rem;color:var(--ink);display:block;margin-bottom:6px}
.yj-path span{font-family:var(--sans);font-size:.84rem;color:var(--maroon)}

/* ---------- SEARCH v4: guided answers ---------- */
.sr-answer{
  background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:0 14px 14px 0;padding:22px 24px;margin-top:28px;
}
.sr-answer h4{font-family:var(--sans);font-size:.74rem;letter-spacing:.28em;color:var(--maroon);margin-bottom:12px}
.sr-answer p{color:var(--ink-soft);line-height:1.8;font-size:.98rem;margin-bottom:14px}
.sr-answer button{
  border:0;background:var(--maroon);color:#fff;border-radius:999px;padding:11px 26px;
  font-family:var(--sans);font-size:.85rem;letter-spacing:.08em;cursor:pointer;transition:background var(--t-fast) var(--ease);
}
.sr-answer button:hover{background:var(--maroon-deep)}

/* ---------- visited (light personalization) ---------- */
.visited-line{font-family:var(--sans);font-size:.82rem;color:#8f7c58;margin-top:16px}
.visited-line button{background:none;border:0;color:#8f7c58;text-decoration:underline;cursor:pointer;font-size:.82rem;font-family:var(--sans)}
.visited-line button:hover{color:#e8c86a}

/* ---------- v4 mobile ---------- */
@media(max-width:640px){
  .hero-q-label{font-size:.88rem}
  .hero-questions button{padding:12px 20px;font-size:.9rem}
  .cq{padding:12px 20px;font-size:.94rem}
  .ask-q{font-size:1.02rem}
}
@media(hover:none){
  .hero-questions button,.cq,.ask-q{min-height:48px}
}