/* =========================================================================
   Arx Research Circle — homepage
   One idea per screen; photography carries the proof.
   ========================================================================= */

/* Full-screen opening */
.intro-screen {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: grid; grid-template-rows: minmax(0, 1fr) auto auto;
  align-items: center; justify-items: center;
  padding: clamp(24px, 5vh, 56px) var(--gutter) max(22px, env(safe-area-inset-bottom));
  overflow: hidden; isolation: isolate; background: var(--bg);
}
.intro-screen::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(circle at 50% 38%, color-mix(in srgb, var(--accent) 6%, transparent), transparent 38%);
}
.intro-stage { align-self: center; display: grid; justify-items: center; text-align: center; padding-top: 2vh; }
.intro-mark { width: min(45vh, 390px); max-width: 82vw; cursor: pointer; overflow: visible; }
.intro-mark .particle-ring { fill: var(--fg-soft); transform-box: fill-box; transform-origin: center; opacity: 0; }
.intro-mark .particle-ring-outer { animation: particle-arrive 2s cubic-bezier(.35,.05,.28,1) .1s forwards, orbit-clockwise 38s linear 2.1s infinite; }
.intro-mark .particle-ring-inner { fill: var(--accent); animation: particle-arrive 2.3s cubic-bezier(.35,.05,.28,1) .28s forwards, orbit-counter 29s linear 2.58s infinite; }
.intro-mark .particle-ring circle:nth-child(3n) { opacity: .38; }
.intro-mark .particle-ring circle:nth-child(4n) { opacity: .68; }
.intro-mark .intro-glyph .draw {
  fill: none; stroke: var(--fg); stroke-width: 4.2; stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  animation: intro-logo-draw 2.8s cubic-bezier(.35,.05,.28,1) .65s forwards;
}
.intro-mark .intro-glyph .star {
  fill: var(--accent); opacity: 0; transform-box: fill-box; transform-origin: center;
  animation: intro-star 2.2s ease-in-out 3.15s infinite;
}
.intro-stage h1 {
  margin: clamp(-30px, -3vh, -12px) 0 0;
  font: 600 clamp(30px, 4vw, 54px)/1.05 var(--display); letter-spacing: 0;
  opacity: 0; transform: translateY(14px); animation: intro-reveal .9s ease 2.65s forwards;
}
.intro-stage p {
  margin: 12px 0 0; color: var(--muted); font: 400 11px/1.3 var(--mono);
  letter-spacing: .14em; text-transform: uppercase;
  opacity: 0; transform: translateY(10px); animation: intro-reveal .8s ease 2.9s forwards;
}
.intro-nav {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px clamp(18px, 2.7vw, 42px);
  max-width: 1000px; padding: 16px 0;
  opacity: 0; transform: translateY(12px); animation: intro-reveal .9s ease 3.2s forwards;
}
.intro-nav a { color: var(--muted); font-size: 14px; text-decoration: none; transition: color .2s; }
.intro-nav a:hover, .intro-nav a:focus-visible { color: var(--fg); }
.intro-nav a[data-lms] { color: var(--accent); }
.intro-scroll {
  display: grid; justify-items: center; gap: 7px; color: var(--muted); text-decoration: none;
  font: 400 10px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  opacity: 0; animation: intro-reveal .8s ease 3.55s forwards;
}
.intro-scroll span { width: 1px; height: 26px; background: var(--line); position: relative; overflow: hidden; }
.intro-scroll span::after {
  content: ""; position: absolute; inset: 0; background: var(--accent); transform: translateY(-100%);
  animation: scroll-trace 2s ease-in-out 4s infinite;
}
@keyframes particle-arrive { from { opacity: 0; transform: scale(.72) rotate(-18deg); } to { opacity: .82; transform: scale(1) rotate(0); } }
@keyframes orbit-clockwise { to { transform: rotate(360deg); } }
@keyframes orbit-counter { to { transform: rotate(-360deg); } }
@keyframes intro-logo-draw { to { stroke-dashoffset: 0; } }
@keyframes intro-star { 0%, 100% { opacity: .28; transform: scale(.65); } 45%, 65% { opacity: 1; transform: scale(1.12); } }
@keyframes intro-reveal { to { opacity: 1; transform: translateY(0); } }
@keyframes scroll-trace { 0% { transform: translateY(-100%); } 50%, 100% { transform: translateY(100%); } }
@media (max-width: 680px) {
  .intro-screen { padding-inline: 20px; }
  .intro-mark { width: min(40vh, 300px); }
  .intro-stage h1 { margin-top: -18px; font-size: clamp(29px, 9vw, 40px); }
  .intro-nav { gap: 7px 20px; padding-block: 12px; }
  .intro-nav a { padding-block: 5px; font-size: 13px; }
  .intro-scroll span { height: 18px; }
}
@media (max-height: 680px) and (min-width: 681px) {
  .intro-mark { width: min(39vh, 280px); }
  .intro-stage h1 { font-size: 34px; }
}
@media (prefers-reduced-motion: reduce) {
  .intro-mark .particle-ring-outer, .intro-mark .particle-ring-inner,
  .intro-mark .intro-glyph .draw, .intro-mark .intro-glyph .star,
  .intro-stage h1, .intro-stage p, .intro-nav, .intro-scroll, .intro-scroll span::after { animation: none; }
  .intro-mark .particle-ring { opacity: .82; transform: none; }
  .intro-mark .intro-glyph .draw { stroke-dashoffset: 0; }
  .intro-mark .intro-glyph .star { opacity: 1; }
  .intro-stage h1, .intro-stage p, .intro-nav, .intro-scroll { opacity: 1; transform: none; }
  .intro-scroll span::after { display: none; }
}

/* Hero */
.hero { padding-block: clamp(56px, 9vw, 120px) clamp(40px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 {
  font: 600 clamp(40px, 6.4vw, 84px)/1.02 var(--display); letter-spacing: -.025em;
  margin: 18px 0 0; text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lede { font-size: clamp(18px, 1.6vw, 21px); color: var(--muted); max-width: 34em; margin: 28px 0 0; }
.hero p.lede strong { color: var(--fg); font-weight: 500; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.mark { width: 100%; max-width: 460px; justify-self: end; cursor: pointer; }
.mark .draw { fill: none; stroke: var(--fg); stroke-width: 4.2; stroke-linecap: round; stroke-linejoin: round; }
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; }
  .mark { order: -1; max-width: 220px; justify-self: start; }
}

/* Photo band */
.band { position: relative; }
.band img { width: 100%; aspect-ratio: 21 / 9; object-fit: cover; object-position: center 45%; filter: saturate(.85); }
.band figcaption {
  position: absolute; left: var(--gutter); bottom: 18px;
  font: 400 12px/1.3 var(--mono); letter-spacing: .08em; color: #ede8e0;
  background: rgba(18,18,18,.72); padding: 7px 10px; border-radius: 4px;
}
@media (max-width: 620px) { .band img { aspect-ratio: 4 / 3; } }

/* Sections */
section.block { padding-block: clamp(72px, 10vw, 136px); border-top: 1px solid var(--line); }
.block h2 {
  font: 600 clamp(30px, 4vw, 52px)/1.08 var(--display); letter-spacing: -.02em;
  margin: 16px 0 0; max-width: 17em; text-wrap: balance;
}
.block .intro { color: var(--muted); max-width: 38em; margin: 22px 0 0; font-size: 18px; }

/* What Arx is: three statements */
.triad { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 64px; border-top: 1px solid var(--line); }
.triad > div { padding: 30px 28px 8px 0; min-width: 0; }
.triad > div + div { padding-left: 28px; border-left: 1px solid var(--line); }
.triad .who { font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.triad h3 { font: 600 24px/1.2 var(--display); margin: 14px 0 12px; letter-spacing: -.01em; }
.triad p { color: var(--muted); margin: 0; font-size: 16px; }
@media (max-width: 820px) {
  .triad { grid-template-columns: 1fr; }
  .triad > div, .triad > div + div { padding: 26px 0; border-left: 0; border-bottom: 1px solid var(--line); }
}

/* Why public policy */
.essay-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 3vw, 44px); margin-top: 36px; }
.essay-cols p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.65; }
.essay-cols p:first-child { color: var(--fg); }
@media (max-width: 900px) { .essay-cols { grid-template-columns: 1fr; max-width: 40em; } }
.cse { margin-top: 56px; padding: 28px clamp(20px, 3vw, 36px); border: 1px solid var(--line); border-left: 2px solid var(--accent); background: var(--bg-raise); border-radius: 4px; }
.cse p:last-child { margin: 12px 0 0; font-size: 18px; max-width: 52em; }

/* Programme */
.prog { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.awards { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.awards li { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.awards .yr { font: 500 13px/1 var(--mono); color: var(--accent); letter-spacing: .06em; }
.awards b { font-weight: 600; display: block; font-size: 18px; }
.awards span { color: var(--muted); font-size: 15px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.tags span { font: 400 12px/1 var(--mono); letter-spacing: .06em; padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); }
@media (max-width: 820px) { .prog { grid-template-columns: 1fr; } }

/* In session */
.session { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.session img { border-radius: 6px; aspect-ratio: 16 / 10; object-fit: cover; }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px 28px; margin-top: 44px; }
.stat b { display: block; font: 600 clamp(38px, 4.4vw, 56px)/1 var(--display); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.stat span { display: block; color: var(--muted); font-size: 15px; margin-top: 10px; max-width: 16em; }
@media (max-width: 820px) { .session { grid-template-columns: 1fr; } .session img { order: -1; } }

/* Why */
.funnel { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 56px; }
.funnel div { padding-top: 22px; border-top: 1px solid var(--line); min-width: 0; }
.funnel div:last-child { border-top-color: var(--accent); }
.funnel b { display: block; font: 600 clamp(34px, 4vw, 52px)/1 var(--display); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.funnel div:last-child b { color: var(--accent); }
.funnel span { display: block; color: var(--muted); font-size: 15px; margin-top: 10px; }
.source { font: 400 12px/1.5 var(--mono); color: var(--muted); margin-top: 28px; letter-spacing: .02em; }
@media (max-width: 700px) { .funnel { grid-template-columns: 1fr; } }

/* People */
.people { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(28px, 5vw, 72px); margin-top: 56px; }
.person { border-top: 1px solid var(--line); padding-top: 26px; min-width: 0; }
.person h3 { font: 600 26px/1.15 var(--display); margin: 0; letter-spacing: -.01em; }
.person .role { font: 500 12px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-top: 10px; }
.person p { color: var(--muted); margin: 16px 0 0; font-size: 16px; }
@media (max-width: 760px) { .people { grid-template-columns: 1fr; } }

/* Contact */
.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
.contact h2 { font-size: clamp(34px, 5vw, 64px); }
.lines { display: grid; gap: 0; border-top: 1px solid var(--line); }
.lines > div { padding: 22px 0; border-bottom: 1px solid var(--line); display: grid; gap: 6px; }
.lines .who { font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.lines .what { font-size: 17px; }
.email { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
.email code { font: 500 clamp(16px, 1.7vw, 20px)/1.2 var(--mono); color: var(--fg); user-select: all; word-break: break-all; }
.copy {
  font: 500 12px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  background: transparent; color: var(--accent); border: 1px solid var(--line);
  border-radius: 999px; padding: 9px 13px; cursor: pointer;
}
.copy:hover { border-color: var(--accent); }
@media (max-width: 820px) { .contact { grid-template-columns: 1fr; } }

/* Helpers that replaced inline styles */
.band { margin: 0; }
.research-link { margin-top: 36px; }
.email a { text-decoration: none; }