:root {
  --nh: 224;

  --accent:        hsl(238 70% 50%);
  --accent-soft:   hsl(238 90% 96.5%);
  --accent-fg:     hsl(0 0% 100%);
  --focus:         hsl(238 85% 58%);
  --focus-ring:    hsl(238 85% 58% / .22);
  --hl:            hsl(238 80% 97%);

  --glow-a:        hsl(213 92% 62% / .13);
  --glow-b:        hsl(276 84% 62% / .11);
  --glow-c:        hsl(162 72% 48% / .10);

  --brand-a:       hsl(213 78% 50%);
  --brand-b:       hsl(276 66% 58%);
  --brand-glow:    hsl(245 65% 48% / .32);

  --band-junior-fg:     hsl(163 72% 24%);
  --band-junior-soft:   hsl(163 55% 92%);
  --band-junior-line:   hsl(163 40% 74%);

  --band-mid-fg:        hsl(213 78% 38%);
  --band-mid-soft:      hsl(213 88% 93%);
  --band-mid-line:      hsl(213 65% 78%);

  --band-senior-fg:     hsl(266 56% 45%);
  --band-senior-soft:   hsl(266 78% 95%);
  --band-senior-line:   hsl(266 48% 82%);

  --band-architect-fg:  hsl(26 78% 36%);
  --band-architect-soft:hsl(32 88% 92%);
  --band-architect-line:hsl(32 65% 76%);

  --shell: min(1120px, calc(100vw - 48px));
}

:root[data-theme='dark'] {
  --accent:        hsl(232 95% 74%);
  --accent-soft:   hsl(232 48% 20%);
  --accent-fg:     hsl(232 45% 9%);
  --focus:         hsl(232 95% 74%);
  --focus-ring:    hsl(232 95% 74% / .28);
  --hl:            hsl(232 42% 16%);

  --glow-a:        hsl(213 92% 56% / .16);
  --glow-b:        hsl(276 84% 58% / .14);
  --glow-c:        hsl(162 72% 44% / .10);

  --brand-a:       hsl(213 84% 58%);
  --brand-b:       hsl(276 74% 64%);
  --brand-glow:    hsl(245 75% 52% / .40);

  --band-junior-fg:     hsl(160 62% 60%);
  --band-junior-soft:   hsl(163 38% 16%);
  --band-junior-line:   hsl(163 28% 30%);

  --band-mid-fg:        hsl(211 84% 70%);
  --band-mid-soft:      hsl(213 46% 19%);
  --band-mid-line:      hsl(213 34% 34%);

  --band-senior-fg:     hsl(267 82% 78%);
  --band-senior-soft:   hsl(266 38% 21%);
  --band-senior-line:   hsl(266 28% 36%);

  --band-architect-fg:  hsl(36 88% 64%);
  --band-architect-soft:hsl(32 44% 18%);
  --band-architect-line:hsl(32 32% 32%);
}

html, body { height: auto; min-height: 100%; }
body { overscroll-behavior: auto; }

body::before {
  content: '';
  position: fixed;
  inset: -30vh -20vw auto;
  height: 120vh;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(44% 46% at 18% 16%, var(--glow-a), transparent 68%),
    radial-gradient(40% 44% at 82% 8%,  var(--glow-b), transparent 66%),
    radial-gradient(46% 40% at 52% 72%, var(--glow-c), transparent 70%);
  animation: driftA 42s var(--ease-in-out) infinite alternate;
}

@keyframes driftA {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(2%, 3%, 0) scale(1.06); }
}

.page {
  width: var(--shell);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ── Nav ──────────────────────────────────────────────────────────────── */

.nav {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 0 10px;
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(to bottom, var(--bg) 62%, transparent);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.nav__mark {
  flex: 0 0 auto;
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid; place-items: center;
  color: #fff;
  background:
    linear-gradient(155deg, hsl(0 0% 100% / .28), transparent 52%),
    linear-gradient(150deg, var(--brand-a), var(--brand-b));
  box-shadow:
    inset 0 1px 0 hsl(0 0% 100% / .35),
    0 4px 12px var(--brand-glow),
    var(--shadow-sm);
}
.nav__mark svg { width: 19px; height: 19px; display: block; }

.nav__name { font-size: 15.5px; font-weight: 680; letter-spacing: -.01em; }
.nav__spacer { flex: 1 1 auto; }
.nav__actions { display: flex; align-items: center; gap: 8px; }

.seg {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: var(--surface-3);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
}
.seg__btn {
  display: grid; place-items: center;
  min-width: 30px; height: 26px;
  padding: 0 8px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 620;
  letter-spacing: .02em;
  color: var(--text-muted);
  transition: background .15s ease, color .15s ease, box-shadow .15s ease;
}
.seg__btn:hover { color: var(--text); }
.seg__btn[aria-pressed='true'] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.seg__btn svg { width: 15px; height: 15px; display: block; }

/* ── Hero ─────────────────────────────────────────────────────────────── */

.hero {
  padding: clamp(46px, 11vh, 108px) 0 clamp(40px, 7vh, 72px);
  max-width: 44rem;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 5px 12px 5px 6px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-size: 12.5px;
  font-weight: 560;
  color: var(--text-muted);
}
html[dir='rtl'] .hero__eyebrow { padding: 5px 6px 5px 12px; }

.hero__pips { display: inline-flex; gap: 3px; }
.hero__pip {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--pip, var(--accent));
  animation: pipPulse 3.4s var(--ease-in-out) infinite;
  animation-delay: var(--d, 0s);
}
@keyframes pipPulse {
  0%, 70%, 100% { opacity: .45; transform: scale(.85); }
  35%           { opacity: 1;   transform: scale(1.12); }
}

.hero__title {
  margin: 0;
  font-size: clamp(38px, 6.6vw, 68px);
  line-height: 1.04;
  font-weight: 760;
  letter-spacing: -.035em;
  background: linear-gradient(115deg,
    var(--text) 22%,
    color-mix(in srgb, var(--accent) 88%, var(--text)) 52%,
    var(--text) 82%);
  background-size: 260% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sheen 9s var(--ease-in-out) infinite alternate;
}
html[lang='fa'] .hero__title { letter-spacing: 0; line-height: 1.35; font-size: clamp(32px, 5.4vw, 56px); }

@keyframes sheen {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

.hero__lead {
  margin: 22px 0 0;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.68;
  color: var(--text-muted);
  max-width: 40rem;
}
html[lang='fa'] .hero__lead { line-height: 2; }

.hero__row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 620;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .2s var(--ease-out), box-shadow .2s ease,
              background .18s ease, border-color .18s ease, color .18s ease;
}
.btn svg { width: 16px; height: 16px; flex: 0 0 auto; }
html[dir='rtl'] .btn svg { transform: scaleX(-1); }

.btn--primary {
  background: var(--accent);
  color: var(--accent-fg);
  box-shadow: 0 1px 2px hsl(var(--nh) 40% 20% / .16), 0 10px 26px var(--focus-ring);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 2px 4px hsl(var(--nh) 40% 20% / .18), 0 16px 34px var(--focus-ring); }
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: var(--border-strong); transform: translateY(-2px); }

.hero__facts {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--border-soft);
}
.fact { display: flex; flex-direction: column; gap: 2px; }
.fact b {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.fact span { font-size: 12.5px; color: var(--text-muted); }

/* ── Section furniture ────────────────────────────────────────────────── */

section { scroll-margin-top: 78px; }

.section-head { margin-bottom: 28px; max-width: 42rem; }

.section-head h2 {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  letter-spacing: -.022em;
}
html[lang='fa'] .section-head h2 { letter-spacing: 0; }

.section-head p {
  margin: 9px 0 0;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.66;
}

.kicker {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}
html[lang='fa'] .kicker { letter-spacing: .02em; text-transform: none; font-size: 12px; }

/* ── Team cards ───────────────────────────────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 18px;
  padding-bottom: clamp(40px, 8vh, 84px);
}

.card {
  --ink:  hsl(var(--h) 72% 33%);
  --edge: hsl(var(--h) 58% 62%);
  --wash: hsl(var(--h) 72% 50% / .07);

  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px 22px 20px;
  border-radius: var(--r-xl);
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform .34s var(--ease-out), box-shadow .34s ease,
              border-color .28s ease;
}

:root[data-theme='dark'] .card {
  --ink:  hsl(var(--h) 82% 70%);
  --edge: hsl(var(--h) 50% 40%);
  --wash: hsl(var(--h) 72% 54% / .10);
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -2;
  background: radial-gradient(120% 90% at 0% 0%, var(--wash), transparent 62%);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%),
              hsl(var(--h) 84% 58% / .17), transparent 68%);
  transition: opacity .34s ease;
}

.card:hover, .card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--edge);
  box-shadow: var(--shadow-md), 0 0 0 1px hsl(var(--h) 60% 55% / .12);
}
.card:hover::before, .card:focus-visible::before { opacity: 1; }
.card:active { transform: translateY(-1px); }

.card__head { display: flex; align-items: center; gap: 13px; }

.card__mark {
  flex: 0 0 auto;
  width: 46px; height: 46px;
  border-radius: 14px;
  display: grid; place-items: center;
  color: #fff;
  background:
    linear-gradient(155deg, hsl(0 0% 100% / .26), transparent 54%),
    linear-gradient(150deg, hsl(var(--h) 68% 46%), hsl(var(--h2) 66% 54%));
  box-shadow:
    inset 0 1px 0 hsl(0 0% 100% / .34),
    0 6px 16px hsl(var(--h) 60% 40% / .30);
  transition: transform .34s var(--ease-out);
}
.card:hover .card__mark { transform: translateY(-2px) rotate(-4deg) scale(1.04); }
.card__mark svg { width: 24px; height: 24px; display: block; }

.card__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.25;
}
html[lang='fa'] .card__name { letter-spacing: 0; }

.card__tag {
  margin: 2px 0 0;
  font-size: 12.8px;
  color: var(--ink);
  font-weight: 560;
}

.card__blurb {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.68;
  color: var(--text-muted);
  flex: 1 1 auto;
}
html[lang='fa'] .card__blurb { line-height: 2; font-size: 13.4px; }

.card__pillars {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.card__pillars li {
  font-size: 11.5px;
  font-weight: 560;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  color: var(--ink);
  background: hsl(var(--h) 70% 50% / .10);
  border: 1px solid hsl(var(--h) 55% 55% / .22);
}

.card__rungs {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 26px;
}
.rung {
  flex: 1 1 0;
  border-radius: 2px;
  background: hsl(var(--h) calc(34% + var(--i) * 3.2%) calc(74% - var(--i) * 2.1%));
  height: calc(34% + var(--i) * 4.7%);
  transform-origin: bottom;
  transform: scaleY(var(--on, 0));
  transition: transform .5s var(--ease-out);
  transition-delay: calc(var(--i) * 26ms);
}
:root[data-theme='dark'] .rung {
  background: hsl(var(--h) calc(30% + var(--i) * 3%) calc(30% + var(--i) * 2.4%));
}
.card.is-in .rung { --on: 1; }
.card:hover .rung { background: hsl(var(--h) calc(46% + var(--i) * 3%) calc(64% - var(--i) * 1.8%)); }

.card__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 15px;
  border-top: 1px solid var(--border-soft);
}

.card__go {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--ink);
}
.card__go svg {
  width: 15px; height: 15px;
  transition: transform .28s var(--ease-out);
}
html[dir='rtl'] .card__go svg { transform: scaleX(-1); }
.card:hover .card__go svg { transform: translateX(4px); }
html[dir='rtl'] .card:hover .card__go svg { transform: scaleX(-1) translateX(4px); }

.card__host {
  margin-inline-start: auto;
  font-size: 10.8px;
  color: var(--text-muted);
  direction: ltr;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 55%;
}

.card.is-soon { cursor: default; opacity: .72; }
.card.is-soon:hover { transform: none; border-color: var(--border); box-shadow: var(--shadow-sm); }
.card.is-soon:hover::before { opacity: 0; }

.card__badge {
  position: absolute;
  top: 16px;
  inset-inline-end: 16px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--r-pill);
  color: var(--text-muted);
  background: var(--surface-3);
  border: 1px solid var(--border-soft);
}
html[lang='fa'] .card__badge { letter-spacing: 0; text-transform: none; }

/* ── How a ladder reads ───────────────────────────────────────────────── */

.how { padding-bottom: clamp(44px, 8vh, 88px); }

.bands {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
}

.band {
  --fg:   var(--band-junior-fg);
  --soft: var(--band-junior-soft);
  --line: var(--band-junior-line);

  position: relative;
  padding: 18px 18px 17px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}
.band[data-band='junior']    { --fg: var(--band-junior-fg);    --soft: var(--band-junior-soft);    --line: var(--band-junior-line); }
.band[data-band='mid']       { --fg: var(--band-mid-fg);       --soft: var(--band-mid-soft);       --line: var(--band-mid-line); }
.band[data-band='senior']    { --fg: var(--band-senior-fg);    --soft: var(--band-senior-soft);    --line: var(--band-senior-line); }
.band[data-band='architect'] { --fg: var(--band-architect-fg); --soft: var(--band-architect-soft); --line: var(--band-architect-line); }

.band::before {
  content: '';
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 3px;
  background: var(--fg);
}

.band__range {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  color: var(--fg);
  background: var(--soft);
  border: 1px solid var(--line);
  margin-bottom: 10px;
}

.band__name { margin: 0; font-size: 15.5px; font-weight: 660; letter-spacing: -.01em; }
.band__note { margin: 5px 0 0; font-size: 12.8px; line-height: 1.62; color: var(--text-muted); }
html[lang='fa'] .band__note { line-height: 1.9; }

.ruler {
  display: flex;
  gap: 4px;
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow-x: auto;
}
.ruler__step {
  flex: 1 1 0;
  min-width: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
}
.ruler__bar {
  width: 100%;
  height: 6px;
  border-radius: var(--r-pill);
  background: var(--tone);
  opacity: calc(.42 + var(--i) * .04);
}
.ruler__n {
  font-size: 11px;
  font-weight: 620;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
}
.ruler__step[data-band='junior']    { --tone: var(--band-junior-fg); }
.ruler__step[data-band='mid']       { --tone: var(--band-mid-fg); }
.ruler__step[data-band='senior']    { --tone: var(--band-senior-fg); }
.ruler__step[data-band='architect'] { --tone: var(--band-architect-fg); }

/* ── Footer ───────────────────────────────────────────────────────────── */

.foot {
  margin-top: auto;
  padding: 22px 0 30px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-muted);
}
.foot__spacer { flex: 1 1 auto; }
.foot code {
  font-size: 11.5px;
  padding: 1px 6px;
  border-radius: var(--r-xs);
  background: var(--surface-3);
  border: 1px solid var(--border-soft);
  direction: ltr;
}
.foot__build { font-variant-numeric: tabular-nums; }

/* ── Reveal ───────────────────────────────────────────────────────────── */

html.js-reveal .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .7s var(--ease-out);
  transition-delay: var(--delay, 0ms);
}
html.js-reveal .reveal.is-in { opacity: 1; transform: none; }

@media (max-width: 720px) {
  :root { --shell: calc(100vw - 32px); }
  .nav { padding-top: 14px; }
  .nav__name { display: none; }
  .hero { padding-top: 34px; }
  .hero__facts { gap: 18px; }
  .fact b { font-size: 22px; }
  .cards { grid-template-columns: 1fr; }
  .card__host { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html.js-reveal .reveal { opacity: 1; transform: none; }
  .card.is-in .rung, .rung { --on: 1; }
  body::before, .hero__title, .hero__pip { animation: none; }
}

@media print {
  body::before, .nav__actions { display: none; }
  .card { break-inside: avoid; }
}