/* Home page (index.html): hero, sponsor ribbon, mission, why us, fields, plan teaser, partners, team, sponsors. */

/* hero */
.hero { padding-block: clamp(72px, 11vw, 140px) clamp(56px, 8vw, 96px); position: relative; overflow: hidden; isolation: isolate; }
.hero h1 { font-size: var(--t-hero); line-height: 1; letter-spacing: -0.045em; max-width: 12ch; margin-top: 22px; }
.hero h1 span { color: var(--accent); }
.hero .lead { margin: 48px 0 0 auto; width: min(100%, 540px); color: var(--fg); }
@media (max-width: 800px) { .hero .lead { margin-left: 0; margin-top: 36px; } }
.hero::before, .hero::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; filter: blur(70px); pointer-events: none; }
.hero::before { width: 520px; height: 520px; right: -120px; top: -160px; background: rgb(200 16 46 / 0.16); animation: drift 16s ease-in-out infinite alternate; }
.hero::after { width: 420px; height: 420px; right: 22%; bottom: -220px; background: rgb(98 98 107 / 0.16); animation: drift 20s ease-in-out infinite alternate-reverse; }
.hero .label { background: var(--grad-red); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .label, .hero h1, .hero h3, .hero .lead { animation: rise .9s var(--ease) both; }
.hero h3 { animation-delay: .08s; }
.hero .lead { animation-delay: .2s; }

/* sponsor ribbon */
.ribbon { padding-block: 28px; border-block: 1px solid var(--line); overflow: hidden; }
.ribbon-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.ribbon-head .label { color: var(--muted); }
.ribbon-toggle { font: inherit; font-size: var(--t-sm); font-weight: 500; color: var(--muted); background: none; border: 1px solid var(--line); border-radius: 99px; padding: 4px 14px; cursor: pointer; }
.ribbon-toggle:hover { color: var(--fg); border-color: var(--muted); }
.ribbon-view { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee { display: flex; width: max-content; animation: ribbon-scroll 40s linear infinite; }
.marquee ul { display: flex; flex: none; gap: 72px; padding: 0 72px 0 0; margin: 0; list-style: none; }
.marquee li { font-weight: 600; font-size: var(--t-xl); letter-spacing: -0.02em; white-space: nowrap; color: var(--muted); }
.marquee li.real { color: var(--fg); }
.ribbon.paused .marquee, .ribbon-view:hover .marquee { animation-play-state: paused; }
@keyframes ribbon-scroll { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .marquee { width: auto; flex-wrap: wrap; }
  .marquee ul[aria-hidden="true"], .ribbon-toggle { display: none; }
  .ribbon-view { -webkit-mask-image: none; mask-image: none; }
}

/* mission */
.split .body { display: grid; gap: 20px; align-content: start; padding-top: 8px; color: var(--muted); }
.split .body p:first-child { color: var(--fg); font-size: var(--t-lg); line-height: 1.5; }
.formats { margin-top: 12px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--fg); font-weight: 500; }
.formats span { color: var(--muted); font-weight: 400; display: block; font-size: var(--t-md); margin-bottom: 6px; }

/* Kleve photo: one layer behind the lower half of Mission and all of Why us (.photo-run in index.html).
   main.js sets --photo-top (half of Mission) and --fade (depth of the top fade, which shortens as you scroll so more of the photo opens up) */
.photo-run { --edge: clamp(240px, 26vw, 360px); --fade: 520px; position: relative; isolation: isolate; }
.photo-run .wrap { position: relative; z-index: 1; }
.photo-run .home-credit { z-index: 1; }
.photo { position: absolute; left: 0; right: 0; bottom: 0; top: var(--photo-top, 22%); z-index: 0; isolation: isolate; pointer-events: none;
  background: rgb(var(--photo-shade)) url("../img/schwanenburg-kleve.jpg") 22% calc(30% + var(--py, 0px)) / cover no-repeat;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 calc(var(--fade) * 0.3));
  mask-image: linear-gradient(180deg, transparent 0, #000 calc(var(--fade) * 0.3)); }
/* black and white */
.photo::before { content: ""; position: absolute; inset: 0; background: #26262A; mix-blend-mode: color; opacity: 0.85; }
/* top: a light veil under the Mission text that deepens into the photo; bottom: near-black -> mauve -> pink (fields) */
.photo::after { content: ""; position: absolute; inset: 0; background:
  linear-gradient(180deg, rgb(239 239 242 / 0.92) 0, rgb(232 214 218 / 0.85) calc(var(--fade) * 0.3), rgb(196 156 165 / 0.62) calc(var(--fade) * 0.55), rgb(110 80 88 / 0.45) calc(var(--fade) * 0.78), rgb(18 16 19 / 0) var(--fade)),
  linear-gradient(0deg, #F2C4CC 0, #EDC4CB calc(var(--edge) * 0.16), #DDB0B8 calc(var(--edge) * 0.34), #C1949E calc(var(--edge) * 0.52), rgb(126 90 98 / 0.75) calc(var(--edge) * 0.72), rgb(46 34 38 / 0.35) calc(var(--edge) * 0.88), rgb(18 16 19 / 0) var(--edge)); }
section.home { position: relative; isolation: isolate; color: #F5F5F7; padding-block: calc(var(--gap-section) * 0.5 + var(--edge) * 0.3) calc(var(--gap-section) * 0.5 + var(--edge) * 0.55); }
/* darken behind the Why us text on the right only (the castle sits on the left), fading in and out with the section */
section.home::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(90deg, rgb(18 16 19 / 0.15) 0%, rgb(18 16 19 / 0.2) 38%, rgb(18 16 19 / 0.6) 56%, rgb(18 16 19 / 0.72) 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 calc(var(--edge) * 0.5), #000 calc(100% - var(--edge) * 0.9), transparent calc(100% - var(--edge) * 0.4));
  mask-image: linear-gradient(180deg, transparent 0, #000 calc(var(--edge) * 0.5), #000 calc(100% - var(--edge) * 0.9), transparent calc(100% - var(--edge) * 0.4)); }
/* overlap the next section by 2px so no hairline shows at the join */
.photo-run + section { margin-top: -2px; }
section.home h2 { color: #FFFFFF; text-shadow: 0 2px 24px rgb(0 0 0 / 0.45); }
section.home .split .body { color: #C7CBD3; }
section.home .split .body p:first-child { color: #FFFFFF; }
.stat { display: grid; gap: 10px; padding-block: 24px; border-block: 1px solid rgb(255 255 255 / 0.22); }
.stat strong { font-size: var(--t-2xl); font-weight: 600; letter-spacing: -0.035em; line-height: 1; font-variant-numeric: tabular-nums; color: #FF5A68; text-shadow: 0 0 32px rgb(232 57 74 / 0.45); }
.stat span { color: #C7CBD3; max-width: 46ch; }
.home-credit { position: absolute; right: max(16px, env(safe-area-inset-right, 0px)); bottom: calc(var(--edge) * 0.7); margin: 0; font-size: 12px; }
.home-credit a { color: rgb(255 255 255 / 0.6); text-decoration: none; }
.home-credit a:hover { color: #FFFFFF; text-decoration: underline; }
@media (max-width: 800px) { .photo { background-position: 25% calc(40% + var(--py, 0px)); } .photo-run { --edge: 300px; } .home-credit { bottom: calc(var(--edge) * 0.4); } }

/* plan teaser (links to plan.html) */
.teaser { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: 64px; align-items: center; }
@media (max-width: 800px) { .teaser { grid-template-columns: minmax(0, 1fr); gap: 36px; } }
.teaser .btn { margin-top: 36px; }
.teaser-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.teaser-steps li { padding: 22px; border-radius: 18px; background: var(--grad-grey); border: 1px solid var(--line); transition: transform .4s var(--ease), border-color .3s, background .3s; }
.teaser-steps li:hover { transform: translateY(-4px); border-color: rgb(200 16 46 / 0.4); background: linear-gradient(135deg, #FFFFFF, var(--accent-soft)); }
.teaser-steps b { display: block; font-size: var(--t-sm); letter-spacing: 0.12em; color: var(--accent); font-variant-numeric: tabular-nums; }
.teaser-steps span { display: block; margin-top: 18px; font-size: var(--t-lg); font-weight: 600; letter-spacing: -0.02em; }

/* partners */
.bento { margin-top: 56px; display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 24px 48px; }
.bento > div { min-width: 0; }
.bento .big { grid-row: span 2; background: linear-gradient(145deg, #FFFFFF 0%, var(--grey-2) 70%, rgb(200 16 46 / 0.08) 100%); border: 1px solid var(--line); border-radius: 20px; padding: clamp(24px, 4vw, 44px); transition: transform .5s var(--ease), box-shadow .5s var(--ease); }
.bento .big:hover { transform: translateY(-4px); box-shadow: 0 20px 50px rgb(11 17 34 / 0.12); }
.bento .small { padding-top: 20px; border-top: 1px solid var(--line); }
.bento h3 { margin-bottom: 16px; }
.bento ul { margin: 0; padding-left: 20px; display: grid; gap: 10px; color: var(--muted); }
.bento li::marker { color: var(--accent); }
.bento .big ul { gap: 16px; font-size: var(--t-lg); line-height: 1.4; color: var(--fg); }
@media (max-width: 800px) { .bento { grid-template-columns: minmax(0, 1fr); } .bento .big { grid-row: auto; } }

/* team */
.team { margin-top: 48px; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0; }
.team > div { padding: 22px 20px 22px 0; border-top: 1px solid var(--line); min-width: 0; }
.team .who { font-weight: 700; font-size: var(--t-lg); letter-spacing: -0.02em; transition: color .25s; }
.team > div:hover .who { color: var(--accent); }
.team .role { margin-top: 2px; color: var(--muted); font-size: var(--t-md); }
.team .study { margin-top: 10px; color: var(--fg); font-size: var(--t-md); line-height: 1.4; }

/* sponsors (light grey band at the end of the page) */
.sponsors { position: relative; isolation: isolate; overflow: hidden; background: var(--grad-band); border-top: 1px solid var(--line); }
.sponsors::before, .sponsors::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; filter: blur(90px); pointer-events: none; }
.sponsors::before { width: 640px; height: 640px; left: -240px; top: -280px; background: rgb(200 16 46 / 0.10); animation: drift 18s ease-in-out infinite alternate; }
.sponsors::after { width: 480px; height: 480px; right: -140px; bottom: -240px; background: rgb(98 98 107 / 0.16); animation: drift 22s ease-in-out infinite alternate-reverse; }
.sponsors h2 { max-width: 14ch; }
.sponsors .lead { margin-top: 0; }
.sponsors-head { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: 32px 64px; align-items: end; }
@media (max-width: 800px) { .sponsors-head { grid-template-columns: minmax(0, 1fr); } }

.tier { margin-top: 64px; }
.tier-name { display: flex; align-items: center; gap: 16px; max-width: none; font-size: var(--t-sm); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.tier-name::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--grey-3), transparent); }
.tier-name .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--grad-red); box-shadow: 0 0 10px rgb(200 16 46 / 0.5); }

.sponsor-feature { margin-top: 20px; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 40px; align-items: center; padding: clamp(20px, 4vw, 40px); border-radius: 24px; background: linear-gradient(135deg, #FFFFFF 0%, #FFFFFF 45%, var(--accent-soft) 100%); border: 1px solid var(--line); box-shadow: 0 1px 2px rgb(27 27 31 / 0.04), 0 18px 40px rgb(27 27 31 / 0.06); transition: border-color .4s, transform .5s var(--ease); }
.sponsor-feature:hover { border-color: rgb(200 16 46 / 0.35); transform: translateY(-4px); }
.sponsor-feature p { margin-top: 12px; color: var(--muted); }
@media (max-width: 700px) { .sponsor-feature { grid-template-columns: minmax(0, 1fr); gap: 24px; } }
.logo-plate { position: relative; aspect-ratio: 16 / 9; border-radius: 16px; background: linear-gradient(180deg, #FFFFFF, var(--grey-1)); border: 1px solid var(--line); color: var(--fg); display: grid; place-items: center; font-weight: 700; font-size: clamp(36px, 5vw, 56px); letter-spacing: -0.03em; overflow: hidden; }
.logo-plate::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--grad-red); }
.logo-plate img { max-width: 72%; max-height: 62%; object-fit: contain; }

.sponsor-grid { margin: 20px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); gap: 16px; }
.sponsor-grid.gold { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.sponsor-tile { aspect-ratio: 3 / 2; border-radius: 18px; border: 1px solid var(--line); background: linear-gradient(180deg, #FFFFFF, var(--grey-1)); display: grid; place-items: center; padding: 20px; text-align: center; font-weight: 600; font-size: var(--t-lg); letter-spacing: -0.02em; color: var(--fg); text-decoration: none; transition: transform .4s var(--ease), border-color .3s, box-shadow .4s var(--ease), background .3s; }
.gold .sponsor-tile { aspect-ratio: 2 / 1; font-size: var(--t-xl); }
.sponsor-tile img { max-width: 70%; max-height: 56%; object-fit: contain; }
.sponsor-tile:hover { transform: translateY(-4px); border-color: rgb(200 16 46 / 0.35); background: linear-gradient(135deg, #FFFFFF 40%, var(--accent-soft)); box-shadow: 0 14px 30px rgb(27 27 31 / 0.08); }
.sponsor-tile.open { border-style: dashed; border-color: var(--grey-3); background: transparent; color: var(--muted); font-size: var(--t-md); font-weight: 500; }
.sponsor-tile.open b { display: block; color: var(--accent); font-size: var(--t-xl); line-height: 1; margin-bottom: 8px; }
.sponsor-tile.open:hover { color: var(--accent); border-color: var(--accent); }

.sponsor-cta { margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--grey-3); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px 32px; }
.sponsor-cta p { font-size: var(--t-lg); line-height: 1.4; max-width: 36ch; }
.sponsor-cta .actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* fields: red gradient band with a cyclic deck of cards (behaviour in main.js) */
section.fields {
  position: relative; isolation: isolate; overflow: hidden;
  background:
    linear-gradient(180deg, transparent 72%, #FFFFFF 100%),
    radial-gradient(55% 45% at 12% 42%, rgb(200 16 46 / 0.24), transparent 70%),
    radial-gradient(45% 45% at 90% 55%, rgb(98 98 107 / 0.24), transparent 70%),
    linear-gradient(180deg, #F2C4CC 0%, #FAE3E7 22%, #F4CDD4 50%, #F3E9EB 80%, #FFFFFF 100%);
}
section.fields::before { content: ""; position: absolute; z-index: -1; width: 560px; height: 560px; left: 38%; top: 15%; border-radius: 50%; filter: blur(90px); background: rgb(232 57 74 / 0.22); animation: drift 18s ease-in-out infinite alternate; pointer-events: none; }
section.fields .label { color: var(--accent-lo); }

/* playing-card proportions (5 : 7); side cards fan out behind the active one */
.carousel { --w: clamp(230px, 30vw, 340px); --h: calc(var(--w) * 1.4); --side-scale: 1; margin-top: 40px; }
.stage { position: relative; height: calc(var(--h) + 72px); touch-action: pan-y; user-select: none; -webkit-user-select: none; }

.fcard {
  --o: 0; --x: calc(var(--o) * var(--w) * 0.42); --r: calc(var(--o) * 8deg);
  position: absolute; left: 50%; top: 50%; width: var(--w); height: var(--h);
  margin: calc(var(--h) / -2) 0 0 calc(var(--w) / -2);
  display: flex; flex-direction: column; gap: 12px; padding: clamp(20px, 2.6vw, 30px);
  border-radius: 22px; overflow: hidden; color: #FFFFFF;
  background:
    radial-gradient(110% 70% at 0% 0%, #A10C27 0%, #7E0B1E 30%, transparent 65%),
    linear-gradient(165deg, #7A0A1C 0%, #561923 26%, #5B5960 52%, #A7A7AE 76%, #EDEDF0 100%);
  border: 1px solid rgb(255 255 255 / 0.18);
  box-shadow: 0 24px 50px rgb(110 10 27 / 0.28), 0 6px 14px rgb(27 27 31 / 0.16);
  transform-origin: 50% 100%;
  transform: translateX(var(--x)) translateY(0) perspective(1200px) rotateX(0deg) rotate(var(--r)) scale(var(--side-scale));
  transition: transform .7s var(--ease), opacity .5s, box-shadow .5s;
}
.fcard::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(135deg, rgb(255 255 255 / 0.16), transparent 38%); pointer-events: none; }
.fcard > * { transition: opacity .35s; }
.fcard .tag { align-self: flex-start; font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; padding: 4px 11px; border-radius: 99px; background: rgb(255 255 255 / 0.14); border: 1px solid rgb(255 255 255 / 0.2); }
.fcard h3 { font-size: clamp(22px, 2.4vw, 28px); color: #FFFFFF; letter-spacing: -0.02em; }
.fcard p { font-size: var(--t-md); color: rgb(255 255 255 / 0.85); }
/* link rows at the foot of each card, styled like the downloads file list */
.card-links { margin-top: auto; display: grid; border-radius: 10px; overflow: hidden; background: rgb(255 255 255 / 0.72); border: 1px solid rgb(255 255 255 / 0.8); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); box-shadow: 0 6px 16px rgb(27 27 31 / 0.08); }
.card-links a { display: grid; grid-template-columns: minmax(0, 1fr) 16px; gap: 12px; align-items: center; padding: 9px 14px; font-size: 14px; line-height: 1.4; color: var(--fg); text-decoration: none; border-top: 1px solid rgb(27 27 31 / 0.08); transition: background .2s, color .2s; }
.card-links a:first-child { border-top: 0; }
.card-links a:hover { color: var(--accent); background: linear-gradient(90deg, var(--accent-soft), rgb(255 255 255 / 0.6) 70%); }
.card-links a:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.card-links .link-icon { width: 14px; height: 18px; transition: transform .25s var(--ease); }
.card-links a:hover .link-icon { transform: translateX(2px); }

/* card back: shown on the fanned side cards, a red graffiti "PRB" running corner to corner and spilling off the edges */
.fcard::after {
  content: "PRB"; position: absolute; left: 50%; top: 50%;
  font-family: "Sedgwick Ave Display", "Permanent Marker", cursive; font-size: calc(var(--w) * 0.78); line-height: 1; white-space: nowrap;
  color: rgb(200 16 46 / 0.55); -webkit-text-stroke: 2px rgb(255 255 255 / 0.28);
  transform: translate(-50%, -50%) rotate(54.5deg);
  opacity: 0; transition: opacity .4s; pointer-events: none;
}

/* positions set by main.js */
.fcard[data-pos="active"] { transform: translateX(0) translateY(0) perspective(1200px) rotateX(0deg) rotate(0deg) scale(1); z-index: 3; box-shadow: 0 40px 80px rgb(110 10 27 / 0.34), 0 10px 24px rgb(27 27 31 / 0.18); }
.fcard[data-pos="side"] { z-index: 2; cursor: pointer; }
.fcard[data-pos="side"]::before { background: repeating-linear-gradient(45deg, rgb(255 255 255 / 0.07) 0 3px, transparent 3px 16px), linear-gradient(135deg, rgb(255 255 255 / 0.16), transparent 38%); }
.fcard[data-pos="side"] > *, .fcard[data-pos="hidden"] > * { opacity: 0; visibility: hidden; }
/* outer cards (two steps from the middle): half way through falling over, tipping outwards and back onto the floor.
   --s is -1 on the left, 1 on the right. Clicking one brings it to the middle like the side cards */
.fcard[data-pos="fallen"] {
  --s: calc(var(--o) / 2); z-index: 1; cursor: pointer;
  transform: translateX(calc(var(--s) * var(--w) * 1.0)) translateY(calc(var(--h) * 0.04)) perspective(1200px) rotateX(34deg) rotate(calc(var(--s) * 32deg)) scale(var(--side-scale));
  box-shadow: calc(var(--s) * 18px) 34px 40px rgb(27 27 31 / 0.22), 0 12px 24px rgb(110 10 27 / 0.16);
}
.fcard[data-pos="fallen"]::before { background: repeating-linear-gradient(45deg, rgb(255 255 255 / 0.07) 0 3px, transparent 3px 16px), linear-gradient(135deg, rgb(255 255 255 / 0.16), transparent 38%); }
.fcard[data-pos="fallen"] > * { opacity: 0; visibility: hidden; }
.fcard[data-pos="fallen"]::after { opacity: 1; }
.fcard[data-pos="fallen"]:hover { transform: translateX(calc(var(--s) * var(--w) * 0.98)) translateY(calc(var(--h) * 0.02)) perspective(1200px) rotateX(26deg) rotate(calc(var(--s) * 28deg)) scale(var(--side-scale)); }
/* no room for them on small screens */
@media (max-width: 900px) { .fcard[data-pos="fallen"] { opacity: 0; pointer-events: none; } }
.fcard[data-pos="side"]::after { opacity: 1; }
.fcard[data-pos="side"]:hover { transform: translateX(calc(var(--x) * 1.08)) translateY(0) perspective(1200px) rotateX(0deg) rotate(calc(var(--r) * 1.3)) scale(var(--side-scale)); }
.fcard[data-pos="hidden"] { transform: translateX(calc(var(--x) * 0.4)) translateY(0) perspective(1200px) rotateX(0deg) rotate(0deg) scale(0.4); opacity: 0; z-index: 1; pointer-events: none; }