.hero{position:relative;min-height:90dvh;display:grid;align-items:end;overflow:hidden;background:#111}
.hero__image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.78) contrast(1.03) brightness(.7)}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.34) 0%,rgba(0,0,0,.26) 34%,rgba(0,0,0,.56) 72%,rgba(0,0,0,.9) 100%)
}
.hero__body{position:relative;z-index:2;width:min(100%,var(--wide));margin-inline:auto;padding:7rem var(--gutter) calc(2.4rem + var(--safe-bottom));color:#fff}
.hero__eyebrow{
  display:flex;align-items:center;gap:.6rem;
  color:#fff;
  font-size:18px;
  font-weight:720;
  line-height:1.25;
  margin:0 0 1.2rem
}
.hero__eyebrow::before{content:"";width:1.65rem;height:3px;border-radius:99px;background:#72a7ff}
.hero__body h1{color:#fff;max-width:44rem}
.hero__body p{color:#f0f1f4;font-size:18px;line-height:1.6;margin:1.28rem 0 1.55rem}
.hero__facts{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem;max-width:42rem}
.hero__fact{padding:.96rem;background:rgba(31,31,35,.7);border:1px solid rgba(255,255,255,.13);border-radius:var(--r-sm);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.hero__fact span{display:block;color:#d2d5dc;font-size:12px}
.hero__fact strong{display:block;margin-top:.22rem;font-size:16px;color:#fff;line-height:1.35}

.nav-placeholder{height:0}
.nav-shell{
  position:relative;z-index:90;
  padding:calc(.56rem + var(--safe-top)) .82rem .6rem;
  background:linear-gradient(180deg,rgba(245,245,247,.98),rgba(245,245,247,.9));
  backdrop-filter:blur(28px) saturate(180%);
  -webkit-backdrop-filter:blur(28px) saturate(180%);
  border-bottom:1px solid rgba(0,0,0,.03)
}
.nav-shell.is-fixed{position:fixed;top:0;left:0;right:0;z-index:100}
.nav-scroll{
  display:flex;gap:.54rem;overflow-x:auto;scrollbar-width:none;
  padding:.06rem 3.05rem .16rem .08rem
}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-chip{
  border:1px solid rgba(0,0,0,.075);background:rgba(255,255,255,.86);color:#505055;
  min-height:2.72rem;padding:0 1rem;border-radius:var(--pill);font-size:15px;font-weight:650;white-space:nowrap;
  box-shadow:0 2px 9px rgba(0,0,0,.025);transition:.16s ease
}
.nav-chip:active{transform:scale(.96)}
.nav-chip.is-active{background:var(--accent);color:#fff;border-color:transparent}
.read-progress{height:3px;margin:.42rem -.82rem -.6rem;background:transparent}
.read-progress__bar{height:100%;background:var(--accent);transform:scaleX(0);transform-origin:left}
.top-tap{
  position:fixed;
  top:0;left:0;right:0;
  height:34px;
  z-index:130;
  background:transparent;
  border:0;
  padding:0;
  opacity:.001;
}

.chapter-hero{padding:3.05rem 0 3.1rem;background:var(--grouped)}
.chapter-hero__card{position:relative;overflow:hidden;min-height:24rem;border-radius:var(--r-lg);background:#ddd;box-shadow:var(--shadow)}
.chapter-hero__card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.chapter-hero__card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.08) 40%,rgba(0,0,0,.73) 100%)}
.chapter-hero__copy{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:2rem 1.45rem}
.chapter-hero__copy .index{font-size:12px;color:#d7d7dc;margin-bottom:.62rem}
.chapter-hero__copy h2{color:#fff;font-size:var(--chapter)}
.chapter-hero__copy p{margin:.72rem 0 0;color:#e8e8ed;font-size:15px;line-height:1.58}

.group-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-soft)}
.callout-card{padding:1.18rem 1.2rem;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:var(--r-md);box-shadow:var(--shadow-soft)}
.callout-card strong{display:block;color:var(--ink);font-size:15px;margin-bottom:.56rem}
.callout-card p{margin:0;font-size:15px;color:#2b2b30;line-height:1.62}

.guide-stack{display:grid;gap:2.9rem}
.guide-block h3{font-size:22px;margin-bottom:.85rem}
.guide-block__body{color:#45454a;font-size:17px;line-height:1.74;min-width:0}
.guide-block__body p{margin:0 0 .78rem}.guide-block__body p:last-child{margin-bottom:0}

/* User requested the highlighted cards to use one dark family instead of blue. */
.guide-key{
  width:100%;max-width:100%;min-width:0;
  margin-top:1.25rem;
  padding:1.15rem 1.18rem 1.2rem;
  border-radius:var(--r-md);
  background:#292a2e;
  color:#fff;
  box-shadow:0 9px 22px rgba(36,37,42,.13);
  overflow:hidden;
  word-break:normal
}
.guide-key,.guide-key *{white-space:normal;overflow-wrap:anywhere}
.guide-key b{display:block;margin-bottom:.68rem;color:#d9dbe0;font-size:13px;font-weight:720;line-height:1.25}
.guide-key__text{display:block;color:#fff;font-size:16px;line-height:1.6}
.guide-key span{display:block;margin-top:.55rem;color:#dddfe4;font-size:15px;line-height:1.56}
.key-flow{display:flex!important;flex-wrap:wrap;align-items:center;gap:.35rem .48rem;margin-top:0!important}
.key-flow__item{display:inline!important;margin:0!important;color:#fff!important;font-size:16px!important}
.key-flow__arrow{display:inline!important;margin:0!important;color:#aeb3bd!important;font-size:14px!important}
.guide-key--soft{
  background:#edf0f5;
  color:#24252a;
  border:1px solid rgba(0,0,0,.035);
  box-shadow:none
}
.guide-key--soft b{color:#5b5e67}
.guide-key--soft .guide-key__text,.guide-key--soft .key-flow__item{color:#26272b!important}
.guide-key--soft span{color:#595c64}
.guide-key--soft .key-flow__arrow{color:#81858d!important}

.flow-card{padding:1.15rem}
.flow-list{display:grid;gap:.74rem}
.flow-row{display:grid;grid-template-columns:2rem minmax(0,1fr);gap:.74rem;align-items:start}
.flow-row i{font-style:normal;display:grid;place-items:center;width:2rem;height:2rem;border-radius:50%;background:var(--accent);color:#fff;font-size:14px;font-weight:700}
.flow-row span{font-size:16px;padding-top:.26rem;line-height:1.54;min-width:0}
.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem}
.metric-card{padding:.95rem;background:var(--grouped);border-radius:var(--r-sm);min-width:0}
.metric-card span{display:block;font-size:12px;color:var(--secondary)}
.metric-card b{display:block;margin-top:.22rem;font-size:15px;color:var(--ink);line-height:1.45;overflow-wrap:anywhere}

.subhead{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:.38rem;
  margin-bottom:1.08rem
}
.subhead h3{font-size:22px}
.subhead a,.subhead button{font-size:13px;font-weight:650;color:var(--accent);background:none;border:0;padding:0}

/* Question drawer */
.ask-bubble{position:fixed;z-index:140;min-height:2.45rem;padding:0 .98rem;border-radius:999px;background:#1d1d1f;color:#fff;border:0;font-size:14px;font-weight:700;box-shadow:0 12px 28px rgba(0,0,0,.24)}
.ask-backdrop{position:fixed;inset:0;z-index:150;background:rgba(0,0,0,.22);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.ask-sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:160;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);
  border-radius:26px 26px 0 0;
  box-shadow:0 -18px 40px rgba(0,0,0,.14);
  padding:1rem 1rem calc(1rem + var(--safe-bottom));
  max-height:min(80dvh,44rem);
  overflow:auto;
  transform:translateY(0);
  transition:transform .22s cubic-bezier(.2,.8,.2,1);
  will-change:transform;
  touch-action:pan-y;
}
.ask-sheet.is-dragging{transition:none}
.ask-sheet__handle-wrap{
  display:grid;
  place-items:center;
  min-height:2rem;
  margin:-.55rem -.4rem .2rem;
  cursor:grab;
  touch-action:none;
}
.ask-sheet__handle{
  width:3rem;height:.34rem;border-radius:999px;background:#c9c9cf;margin:0
}
.ask-sheet__top{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.75rem}
.ask-sheet__title{font-size:17px;font-weight:700;color:var(--ink)}
.ask-sheet__min{width:2.25rem;height:2.25rem;border-radius:50%;border:0;background:var(--grouped);color:#4a4a4f;font-size:19px}
.ask-tabs{display:grid;grid-template-columns:1fr 1fr;gap:.25rem;background:var(--grouped);padding:.25rem;border-radius:13px;margin-bottom:.9rem}
.ask-tab{min-height:2.35rem;border:0;border-radius:10px;background:transparent;color:#666970;font-size:14px;font-weight:680}
.ask-tab.is-active{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.05)}
.ask-sheet__quote{padding:.9rem 1rem;border-radius:16px;background:var(--grouped);color:#2f2f34;font-size:15px;line-height:1.58}
.ask-sheet__label{display:block;margin:.95rem 0 .55rem;font-size:13px;font-weight:700;color:var(--secondary)}
.ask-sheet textarea{width:100%;min-height:8.2rem;resize:vertical;padding:.95rem 1rem;border-radius:18px;border:1px solid var(--border);background:#fff;color:var(--ink);font-size:16px;line-height:1.58}
.ask-actions{display:flex;gap:.65rem;margin-top:.9rem}
.ask-secondary,.ask-primary{flex:1;min-height:3rem;border-radius:15px;border:0;font-weight:700}
.ask-secondary{background:var(--grouped);color:#45474e}.ask-primary{background:var(--accent);color:#fff}
.ask-tertiary{width:100%;margin-top:.6rem;min-height:2.7rem;border:0;background:transparent;color:var(--accent);font-size:14px;font-weight:680}
.ask-note{margin-top:.65rem;font-size:12px;color:var(--secondary);line-height:1.5}
.ask-fab{position:fixed;right:1rem;bottom:calc(1rem + var(--safe-bottom));z-index:145;min-height:3rem;padding:0 1rem;border-radius:999px;border:0;background:#1d1d1f;color:#fff;font-weight:700;box-shadow:0 12px 28px rgba(0,0,0,.22)}
.history-list{display:grid;gap:.65rem}
.history-item{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:.55rem;
  align-items:start;
  width:100%;
  border:1px solid var(--border);
  background:#fff;
  border-radius:16px;
  padding:.82rem .82rem .82rem .9rem
}
.history-open{
  min-width:0;
  text-align:left;
  border:0;
  background:transparent;
  padding:0
}
.history-delete{
  flex:none;
  min-width:2.45rem;
  min-height:2.45rem;
  border:0;
  border-radius:12px;
  background:var(--grouped);
  color:#707078;
  font-size:12px;
  font-weight:680
}
.history-delete:active{background:#e7e7eb}
.history-item__q{font-size:14px;font-weight:680;color:var(--ink);line-height:1.45}
.history-item__s{font-size:13px;color:var(--secondary);line-height:1.45;margin-top:.3rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.history-item__time{font-size:11px;color:var(--tertiary);margin-top:.45rem}
.login-card{padding:1rem;background:var(--grouped);border-radius:16px;margin-bottom:.9rem}
.login-card h4{margin:0 0 .35rem;font-size:15px}
.login-card p{margin:0 0 .7rem;font-size:13px;color:var(--secondary);line-height:1.45}
.login-row{display:flex;gap:.5rem}
.login-row input{min-width:0;flex:1;height:2.75rem;border:1px solid var(--border);background:#fff;border-radius:12px;padding:0 .8rem;font-size:15px}
.login-row button{flex:none;border:0;background:var(--accent);color:#fff;border-radius:12px;padding:0 .8rem;font-size:13px;font-weight:700}
.login-state{font-size:12px;color:var(--secondary);margin-top:.55rem}