.materials-main{padding-top:clamp(34px,5vw,68px)}
.materials-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(310px,.72fr);gap:clamp(30px,6vw,80px);align-items:center;min-height:470px;padding:8px 0 46px}
.materials-title{font-size:clamp(3.2rem,5.6vw,5.35rem)}
.materials-intro{max-width:680px;font-size:1.05rem}
.materials-hero-pills{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.materials-hero-pills span{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:color-mix(in srgb,var(--surface) 92%,transparent);box-shadow:0 7px 18px rgba(48,74,112,.07);color:var(--muted);font-size:.8rem;font-weight:850}

.paper-stack{position:relative;width:min(360px,100%);aspect-ratio:1/.86;margin:auto;perspective:900px;filter:drop-shadow(0 28px 36px rgba(48,74,112,.13))}
.paper-sheet{position:absolute;inset:8% 12%;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:0 12px 0 rgba(70,91,130,.07),0 28px 48px rgba(48,74,112,.11);transform-origin:center}
.paper-back{transform:rotate(-8deg) translate(-17px,8px);background:linear-gradient(145deg,var(--surface-lilac),var(--surface))}
.paper-mid{transform:rotate(7deg) translate(16px,5px);background:linear-gradient(145deg,var(--surface-mint),var(--surface))}
.paper-front{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;place-content:center;padding:44px;transform:rotate(-1deg);background:linear-gradient(145deg,#fff,var(--surface-soft));animation:paper-float 5.8s ease-in-out infinite}
.paper-front span{aspect-ratio:1;border-radius:50%;display:grid;place-items:center;font-family:var(--font-ui);font-weight:950;color:var(--ink-strong);border:2px solid color-mix(in srgb,var(--purple) 45%,var(--line));background:linear-gradient(145deg,var(--surface),var(--surface-lilac));box-shadow:0 5px 0 color-mix(in srgb,var(--purple) 17%,transparent)}
.paper-front span:nth-child(2n){border-color:color-mix(in srgb,var(--mint) 58%,var(--line));background:linear-gradient(145deg,var(--surface),var(--surface-mint))}.paper-front span:nth-child(3n){border-color:color-mix(in srgb,var(--pink) 48%,var(--line));background:linear-gradient(145deg,var(--surface),var(--surface-pink))}
.paper-spark{position:absolute;font-size:1.4rem;color:var(--yellow);filter:drop-shadow(0 6px 12px rgba(255,191,61,.24));animation:material-spark 3.3s ease-in-out infinite}.paper-spark-a{right:7%;top:17%}.paper-spark-b{left:5%;bottom:17%;animation-delay:-1.4s}
@keyframes paper-float{0%,100%{transform:rotate(-1deg) translateY(0)}50%{transform:rotate(.5deg) translateY(-7px)}}
@keyframes material-spark{0%,100%{opacity:.35;transform:translateY(0) rotate(0) scale(.8)}50%{opacity:1;transform:translateY(-6px) rotate(28deg) scale(1.08)}}

.materials-showcase{padding-top:clamp(28px,5vw,64px)}
.materials-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.carousel-status{display:inline-flex;align-items:baseline;gap:4px;min-width:70px;justify-content:center;padding:10px 14px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:0 7px 20px rgba(48,74,112,.08);color:var(--muted);font-weight:850}.carousel-status strong{font-size:1.35rem;color:var(--purple)}
.materials-carousel-shell{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr) 64px;gap:16px;align-items:center}
.materials-carousel{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;overscroll-behavior-x:contain;scrollbar-width:none;border-radius:var(--radius-xl);outline:none}.materials-carousel::-webkit-scrollbar{display:none}
.material-slide{flex:0 0 100%;scroll-snap-align:start;display:grid;grid-template-columns:minmax(320px,.9fr) minmax(340px,1.1fr);gap:clamp(28px,5vw,66px);align-items:center;padding:clamp(24px,4vw,48px);border:1px solid var(--line);border-radius:var(--radius-xl);background:linear-gradient(135deg,color-mix(in srgb,var(--surface) 92%,transparent),color-mix(in srgb,var(--surface-lilac) 48%,var(--surface)));box-shadow:var(--shadow-card);min-height:560px}
.material-paper-wrap{display:grid;place-items:center;perspective:1100px;min-height:450px}
.material-paper{position:relative;background:#fff;padding:10px;border-radius:13px;box-shadow:0 14px 0 rgba(67,84,113,.07),0 34px 52px rgba(40,58,90,.18);transform:rotateX(2deg) rotateY(-4deg) rotateZ(-1.2deg);transition:transform .42s cubic-bezier(.2,.8,.2,1),box-shadow .42s ease;overflow:hidden}
.material-slide.is-active .material-paper{animation:material-paper-breathe 6.4s ease-in-out infinite}.material-slide:hover .material-paper{transform:rotateX(1deg) rotateY(-2deg) rotateZ(-.4deg) translateY(-6px);box-shadow:0 17px 0 rgba(67,84,113,.06),0 42px 66px rgba(40,58,90,.2)}
.material-paper.orientation-landscape{width:min(100%,520px);aspect-ratio:1.414/1}.material-paper.orientation-portrait{width:min(76%,360px);aspect-ratio:1/1.414}.material-paper img{width:100%;height:100%;object-fit:contain;border-radius:8px;background:#fff}
.paper-hole{position:absolute;z-index:2;top:7px;width:7px;height:7px;border-radius:50%;background:#edf0f6;box-shadow:inset 0 1px 2px rgba(31,40,61,.25)}.paper-hole-a{left:12px}.paper-hole-b{right:12px}
@keyframes material-paper-breathe{0%,100%{translate:0 0}50%{translate:0 -4px}}
.material-info{max-width:560px}.material-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}.material-tags span{padding:6px 10px;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-size:.72rem;font-weight:900;letter-spacing:.03em;text-transform:uppercase}.material-info h3{margin:0;font-family:var(--font-ui);font-size:clamp(2rem,4vw,3.45rem);line-height:1;letter-spacing:-.04em;color:var(--ink-strong)}.material-info>p{font-size:1rem;line-height:1.7;color:var(--muted);max-width:55ch}.material-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:24px}.material-action-icon{font-size:1.1em;line-height:1}.material-note{display:flex;gap:8px;align-items:flex-start;margin:18px 0 0!important;font-size:.78rem!important;color:var(--muted)!important}.material-note span{color:var(--purple)}

.material-arrow{width:58px;height:58px;border:1px solid var(--line);border-radius:19px;background:linear-gradient(180deg,var(--surface),var(--surface-soft));color:var(--ink-strong);box-shadow:0 6px 0 color-mix(in srgb,var(--line-strong) 72%,transparent),0 18px 30px rgba(48,74,112,.12);display:grid;place-items:center;cursor:pointer;font-family:var(--font-ui);font-size:1.6rem;font-weight:950;transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .22s ease,border-color .22s ease;animation:arrow-alive 3.7s ease-in-out infinite}.material-arrow-next{animation-delay:-1.85s}.material-arrow:hover{transform:translateY(-5px) scale(1.04);border-color:color-mix(in srgb,var(--purple) 30%,var(--line));box-shadow:0 9px 0 color-mix(in srgb,var(--purple) 13%,var(--line)),0 24px 36px rgba(48,74,112,.15)}.material-arrow:active{transform:translateY(3px) scale(.98);box-shadow:0 2px 0 var(--line-strong),0 10px 18px rgba(48,74,112,.1)}
@keyframes arrow-alive{0%,100%{translate:0 0}50%{translate:0 -3px}}
.material-dots{display:flex;justify-content:center;gap:8px;margin:22px auto 0}.material-dots button{width:30px;height:30px;border:0;background:transparent;display:grid;place-items:center;cursor:pointer;border-radius:50%}.material-dots button span{width:8px;height:8px;border-radius:50%;background:var(--line-strong);transition:width .2s ease,background .2s ease,box-shadow .2s ease}.material-dots button[aria-current="true"] span{width:20px;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--purple),var(--pink));box-shadow:0 4px 11px rgba(112,91,226,.22)}

.materials-grid-section{padding-top:clamp(66px,8vw,110px)}.materials-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}.material-mini-card{min-height:126px;display:grid;grid-template-columns:98px minmax(0,1fr) 34px;align-items:center;gap:16px;padding:12px 16px 12px 12px;text-decoration:none;border:1px solid var(--line);border-radius:24px;background:var(--surface);box-shadow:0 8px 0 rgba(85,107,145,.06),0 18px 36px rgba(48,74,112,.09)}.material-mini-preview{height:100px;border-radius:17px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;overflow:hidden;padding:5px}.material-mini-preview img{width:100%;height:100%;object-fit:contain}.material-mini-copy{min-width:0;display:flex;flex-direction:column;gap:5px}.material-mini-copy strong{font-family:var(--font-ui);font-size:1.04rem}.material-mini-copy small{color:var(--muted);font-weight:750}.material-mini-arrow{font-size:1.4rem;color:var(--purple);transition:transform .18s ease}.material-mini-card:hover .material-mini-arrow{transform:translateX(4px)}

html[data-theme="night"] .material-paper,html[data-theme="night"] .material-mini-preview{box-shadow:0 16px 0 rgba(2,6,22,.18),0 34px 58px rgba(1,4,18,.32)}
@media(prefers-color-scheme:dark){html[data-theme="auto"] .material-paper,html[data-theme="auto"] .material-mini-preview{box-shadow:0 16px 0 rgba(2,6,22,.18),0 34px 58px rgba(1,4,18,.32)}}

@media(max-width:980px){.materials-hero{grid-template-columns:1fr .7fr;gap:28px}.materials-carousel-shell{grid-template-columns:52px minmax(0,1fr) 52px;gap:9px}.material-arrow{width:48px;height:48px;border-radius:16px}.material-slide{grid-template-columns:1fr;min-height:0}.material-paper-wrap{min-height:360px}.material-info{max-width:none}.materials-grid{grid-template-columns:1fr}}
@media(max-width:760px){.materials-hero{grid-template-columns:1fr;padding-bottom:30px}.paper-stack{width:min(310px,88%);order:-1}.materials-section-head{align-items:flex-start}.materials-carousel-shell{display:block}.material-arrow{position:absolute;z-index:6;top:250px}.material-arrow-prev{left:8px}.material-arrow-next{right:8px}.materials-carousel{border-radius:30px}.material-slide{padding:22px 18px 28px;border-radius:30px}.material-paper-wrap{min-height:330px;padding:0 44px}.material-info{text-align:center}.material-tags,.material-actions{justify-content:center}.material-note{justify-content:center;text-align:left}.carousel-status{align-self:flex-start}.material-paper.orientation-portrait{width:min(70%,300px)}}
@media(max-width:520px){.materials-title{font-size:clamp(2.7rem,13vw,4rem)}.materials-hero-pills{gap:7px}.materials-hero-pills span{font-size:.72rem}.materials-section-head{display:grid;grid-template-columns:1fr auto}.materials-section-head .copy{grid-column:1/-1}.material-slide{gap:18px}.material-paper-wrap{min-height:280px;padding:0 34px}.material-paper.orientation-landscape{width:100%}.material-paper.orientation-portrait{width:min(76%,250px)}.material-info h3{font-size:2.15rem}.material-actions{display:grid;grid-template-columns:1fr}.material-actions .button{width:100%}.material-arrow{top:210px;width:44px;height:44px;border-radius:15px}.material-mini-card{grid-template-columns:74px minmax(0,1fr) 26px;min-height:102px}.material-mini-preview{height:76px}.paper-stack{width:260px}}
@media(prefers-reduced-motion:reduce){.paper-front,.paper-spark,.material-slide.is-active .material-paper,.material-arrow{animation:none!important}}

/* UI-0018 — School-owned material controls: bold local SVG masks, gradient faces, no generic glyphs. */
.icon-arrow-left{--school-icon-mask:url("../img/material-icons/arrow-left.svg")}
.icon-arrow-right{--school-icon-mask:url("../img/material-icons/arrow-right.svg")}
.icon-download{--school-icon-mask:url("../img/material-icons/download.svg")}
.icon-ink{--school-icon-mask:url("../img/material-icons/ink.svg")}
.icon-play{--school-icon-mask:url("../img/material-icons/play.svg")}

.material-nav-icon,.material-action-icon,.material-mini-arrow{position:relative;display:inline-block;flex:0 0 auto;isolation:isolate}
.material-nav-icon::before,.material-nav-icon::after,.material-action-icon::before,.material-action-icon::after,.material-mini-arrow::before,.material-mini-arrow::after{content:"";position:absolute;inset:0;-webkit-mask:var(--school-icon-mask) center/contain no-repeat;mask:var(--school-icon-mask) center/contain no-repeat;pointer-events:none}

.material-nav-icon{width:29px;height:29px;transition:transform .28s cubic-bezier(.2,.8,.2,1)}
.material-nav-icon::before{z-index:2;background:linear-gradient(135deg,#ffc94f 0%,#ff8a69 42%,#f05b9d 68%,#8b72ff 100%);filter:drop-shadow(0 1px 1px rgba(93,58,120,.14))}
.material-nav-icon::after{z-index:1;background:linear-gradient(135deg,#c77927,#c34378 62%,#5d4dcc);transform:translateY(2.3px);opacity:.62}
.material-arrow:hover .material-nav-icon{transform:scale(1.08)}
.material-arrow-prev:hover .material-nav-icon{transform:translateX(-2px) scale(1.08)}
.material-arrow-next:hover .material-nav-icon{transform:translateX(2px) scale(1.08)}
.material-arrow:active .material-nav-icon{transform:translateY(1px) scale(.96)}

.material-action-icon{width:20px;height:20px;transition:transform .24s cubic-bezier(.2,.8,.2,1)}
.material-action-icon::before{z-index:2;filter:drop-shadow(0 1px 1px rgba(26,37,63,.12))}
.material-action-icon::after{z-index:1;transform:translateY(1.5px);opacity:.55}
.icon-download::before{background:linear-gradient(180deg,#fff8bd 0%,#ffdd61 48%,#ffae55 100%)}
.icon-download::after{background:#c47b28}
.icon-ink::before{background:linear-gradient(135deg,#6d5cff 0%,#7d73ff 35%,#41baf4 100%)}
.icon-ink::after{background:#3d55aa}
.icon-play::before{background:linear-gradient(135deg,#174f4a 0%,#176f68 50%,#4156b9 100%)}
.icon-play::after{background:#103d48}
.material-actions .button:hover .icon-download{transform:translateY(2px) scale(1.04)}
.material-actions .button:hover .icon-ink{transform:translateY(-1px) rotate(-4deg) scale(1.05)}
.material-actions .button:hover .icon-play{transform:translateX(2px) scale(1.05)}
.material-actions .button:active .material-action-icon{transform:translateY(2px) scale(.96)}

.material-mini-arrow{width:21px;height:21px;transition:transform .28s cubic-bezier(.2,.8,.2,1)}
.material-mini-arrow::before{z-index:2;background:linear-gradient(135deg,#7d68ff 0%,#c45fdd 50%,#ff728f 100%)}
.material-mini-arrow::after{z-index:1;background:#6647ae;transform:translateY(1.5px);opacity:.45}
.material-mini-card:hover .material-mini-arrow{transform:translateX(4px) scale(1.06)}

html[data-theme="night"] .material-nav-icon::before{background:linear-gradient(135deg,#ffe174 0%,#ff9a7e 42%,#ff83be 68%,#a99aff 100%)}
html[data-theme="night"] .material-nav-icon::after{background:linear-gradient(135deg,#b97b31,#a84c82 62%,#6254be)}
html[data-theme="night"] .icon-ink::before{background:linear-gradient(135deg,#b5a8ff 0%,#8c90ff 35%,#62d0ff 100%)}
html[data-theme="night"] .icon-ink::after{background:#4d57aa}
html[data-theme="night"] .icon-play::before{background:linear-gradient(135deg,#b7ffe0 0%,#61dec6 45%,#8eb3ff 100%)}
html[data-theme="night"] .icon-play::after{background:#337f84}
html[data-theme="night"] .material-mini-arrow::before{background:linear-gradient(135deg,#aaa0ff 0%,#e18afa 50%,#ff95ae 100%)}

@media(prefers-color-scheme:dark){
  html[data-theme="auto"] .material-nav-icon::before{background:linear-gradient(135deg,#ffe174 0%,#ff9a7e 42%,#ff83be 68%,#a99aff 100%)}
  html[data-theme="auto"] .material-nav-icon::after{background:linear-gradient(135deg,#b97b31,#a84c82 62%,#6254be)}
  html[data-theme="auto"] .icon-ink::before{background:linear-gradient(135deg,#b5a8ff 0%,#8c90ff 35%,#62d0ff 100%)}
  html[data-theme="auto"] .icon-ink::after{background:#4d57aa}
  html[data-theme="auto"] .icon-play::before{background:linear-gradient(135deg,#b7ffe0 0%,#61dec6 45%,#8eb3ff 100%)}
  html[data-theme="auto"] .icon-play::after{background:#337f84}
  html[data-theme="auto"] .material-mini-arrow::before{background:linear-gradient(135deg,#aaa0ff 0%,#e18afa 50%,#ff95ae 100%)}
}

@media(max-width:980px){.material-nav-icon{width:25px;height:25px}}
@media(max-width:520px){.material-nav-icon{width:23px;height:23px}.material-action-icon{width:19px;height:19px}.material-mini-arrow{width:18px;height:18px}}
@media(prefers-reduced-motion:reduce){.material-nav-icon,.material-action-icon,.material-mini-arrow{transition:none!important}}


/* UI-0022 — Materials mobile rebuild.
   The carousel is allowed to scroll; the page is not. Headings may wrap on narrow phones,
   and arrows sit in the preview's breathing room instead of hugging/covering the paper. */
.materials-shell,.materials-main,.materials-hero,.materials-hero-copy,.materials-showcase,
.materials-section-head,.materials-carousel-shell,.materials-carousel,.material-slide,
.material-paper-wrap,.material-info,.materials-grid-section,.materials-grid,.material-mini-card{min-width:0;max-width:100%}
.materials-carousel{width:100%;contain:inline-size;overscroll-behavior-inline:contain}
.material-slide{width:100%;max-width:100%;box-sizing:border-box}
.material-info h3,.material-info>p,.materials-intro{overflow-wrap:anywhere}
.material-arrow{touch-action:manipulation}
.material-dots button{width:44px;height:44px}

@media(max-width:760px){
  .materials-title{max-width:100%}
  .materials-title .headline-line{width:auto;max-width:100%;white-space:normal;overflow-wrap:normal}
  .materials-section-head{min-width:0}
  .materials-section-head>div:first-child{min-width:0}
  .materials-carousel-shell{display:block;width:100%;max-width:100%}
  .materials-carousel{width:100%;max-width:100%;border-radius:28px}
  .material-slide{flex-basis:100%;width:100%;max-width:100%;overflow:hidden}
  .material-paper-wrap{position:relative;width:100%;max-width:100%}
  .material-arrow{width:48px;height:48px;border-radius:16px;top:132px}
  .material-arrow-prev{left:-4px}
  .material-arrow-next{right:-4px}
}
@media(max-width:520px){
  .materials-main{padding-top:24px}
  .materials-hero{gap:20px;padding-bottom:22px}
  .paper-stack{width:min(248px,82vw)}
  .materials-title{font-size:clamp(2.25rem,11.6vw,3.2rem);line-height:1.02}
  .materials-intro{font-size:.97rem;line-height:1.62}
  .materials-hero-pills{gap:6px}
  .materials-hero-pills span{min-height:34px;padding-inline:10px;font-size:.69rem}
  .materials-section-head{grid-template-columns:minmax(0,1fr) auto;column-gap:10px;row-gap:6px}
  .materials-section-head .section-title{font-size:clamp(1.65rem,8.7vw,2.2rem);line-height:1.04}
  .carousel-status{min-width:62px;padding:8px 11px;border-radius:14px}
  .carousel-status strong{font-size:1.18rem}
  .material-slide{padding:18px 12px 24px;border-radius:26px;gap:14px}
  .material-paper-wrap{min-height:250px;padding:0 22px}
  .material-paper.orientation-landscape{width:min(82%,232px)}
  .material-paper.orientation-portrait{width:min(66%,190px)}
  .material-arrow{top:124px;width:48px;height:48px;border-radius:16px}
  .material-arrow-prev{left:-5px}.material-arrow-next{right:-5px}
  .material-info{width:100%;padding-inline:2px}
  .material-tags{gap:5px;margin-bottom:10px}
  .material-tags span{padding:5px 8px;font-size:.66rem}
  .material-info h3{font-size:clamp(1.75rem,9vw,2.15rem);line-height:1.04;letter-spacing:-.035em}
  .material-info>p{font-size:.94rem;line-height:1.58}
  .material-actions{width:100%;gap:9px;margin-top:18px}
  .material-actions .button{width:100%;min-height:52px;padding-inline:13px}
  .material-note{font-size:.75rem!important;line-height:1.5}
  .material-dots{gap:0;margin-top:12px}
  .material-dots button{width:44px;height:44px}
  .materials-grid-section{padding-top:52px}
  .material-mini-card{grid-template-columns:70px minmax(0,1fr) 24px;gap:11px;padding:10px 12px 10px 10px;border-radius:20px;min-height:96px}
  .material-mini-preview{height:72px;border-radius:14px}
  .material-mini-copy strong{font-size:.95rem;line-height:1.14}
  .material-mini-copy small{font-size:.72rem;line-height:1.3}
}
@media(max-width:360px){
  .material-slide{padding-inline:10px}
  .material-paper-wrap{min-height:232px;padding-inline:16px}
  .material-paper.orientation-landscape{width:min(80%,210px)}
  .material-paper.orientation-portrait{width:min(64%,176px)}
  .material-arrow{top:118px}
  .material-arrow-prev{left:-6px}.material-arrow-next{right:-6px}
  .material-info h3{font-size:1.72rem}
}