/* ==========================================================================
   Lithium Energy · styles
   Type: Archivo (display, variable width) · IBM Plex Sans (text) · IBM Plex Mono (data)
   ========================================================================== */

:root {
  --bg: #070b10;
  --bg-2: #0b1118;
  --surface: #10171f;
  --surface-2: #151e28;
  --line: #1c2733;
  --line-2: #2a3846;
  --text: #eef2f6;
  --text-2: #c3ccd6;
  --muted: #8593a3;
  --accent: #3ddbc4;
  --accent-2: #9ef0a8;
  --accent-deep: #17917f;
  --accent-glow: rgba(61, 219, 196, .16);
  --grad: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 100%);

  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --gutter: clamp(16px, 5vw, 88px);
  --max: 1320px;
  --radius: 14px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
p { text-wrap: pretty; }
sub { font-size: .62em; line-height: 0; vertical-align: -.28em; }
figure { margin: 0; }
[hidden] { display: none !important; }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

.sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -4rem; z-index: 100; background: var(--accent); color: var(--bg); padding: .7rem 1rem; }
.skip:focus { top: 1rem; }

.wrap { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }

/* ---------- Type ---------- */

h1, h2, h3 { font-family: var(--display); margin: 0; text-wrap: balance; }

h2 {
  font-size: clamp(2.2rem, 4.8vw, 4.4rem);
  font-weight: 600; font-stretch: 108%;
  line-height: 1; letter-spacing: -.032em;
}
h3 { font-size: 1.3rem; font-weight: 600; line-height: 1.2; letter-spacing: -.01em; }

h2 em, .statement em, .band-quote em {
  font-style: normal; font-weight: 300;
  color: transparent; background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
}

.label, .kicker, .mat-kind, .tag, .chem-sub, .check span, .progress, .tile-n, .stp-n, .hx-n {
  font-family: var(--mono); font-size: .72rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
}
.label { color: var(--accent); margin: 0 0 1.4rem; display: flex; align-items: center; gap: .9rem; }
.label-light { color: rgba(255,255,255,.8); }
.idx {
  display: inline-grid; place-items: center; min-width: 2.2rem; height: 1.55rem; padding: 0 .45rem;
  background: var(--accent-glow); color: var(--accent); border-radius: 4px; letter-spacing: .04em;
}
.fine { color: var(--muted); font-family: var(--mono); font-size: .74rem; margin-top: 1.4rem; }

a.inline { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(61,219,196,.4); transition: border-color .2s; }
a.inline:hover { border-color: var(--accent); }

/* ---------- Buttons ---------- */

.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: .8rem;
  padding: 1rem 1.6rem; border-radius: 999px;
  font-family: var(--body); font-weight: 500; font-size: .95rem;
  text-decoration: none; border: 1px solid transparent;
  transition: transform .3s var(--ease), box-shadow .3s, background .3s, border-color .3s, color .3s;
}
.btn span { transition: transform .3s var(--ease); }
.btn:hover span { transform: translateX(4px); }
.btn-solid { background: var(--grad); color: #03110e; font-weight: 600; }
.btn-solid:hover { transform: translateY(-2px); box-shadow: 0 14px 36px -10px rgba(61,219,196,.6); }
.btn-glass { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.22); color: #fff; backdrop-filter: blur(10px); }
.btn-glass:hover { background: rgba(255,255,255,.16); transform: translateY(-2px); }
.btn-line { background: transparent; border-color: var(--line-2); color: var(--text); }
.btn-line:hover { border-color: var(--text-2); }
.btn-text { background: none; border: 0; color: var(--muted); text-decoration: underline; text-underline-offset: .25em; }
.btn-text:hover { color: var(--text); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; }

/* ---------- Nav ---------- */

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem var(--gutter);
  transition: background .4s, padding .4s, border-color .4s, transform .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding-block: .8rem;
  background: rgba(7, 11, 16, .78);
  backdrop-filter: blur(18px) saturate(1.4);
  border-color: var(--line);
}
.nav.hide { transform: translateY(-100%); }

.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; color: #fff; }
.brand-tile {
  position: relative; display: grid; place-items: center;
  width: 2.35rem; height: 2.35rem; border-radius: 8px;
  background: var(--grad); color: #03110e;
  font-family: var(--display); font-weight: 700; font-size: 1rem; font-stretch: 110%;
}
.brand-tile sup { position: absolute; top: 3px; left: 5px; font-family: var(--mono); font-size: .5rem; }
.brand-word { font-family: var(--display); font-size: 1.02rem; font-weight: 700; font-stretch: 118%; letter-spacing: .07em; text-transform: uppercase; }
.brand-word b { font-weight: 300; margin-left: .35em; opacity: .7; }

.nav ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 2rem; }
.nav ul a { position: relative; text-decoration: none; font-size: .92rem; font-weight: 500; color: rgba(255,255,255,.82); transition: color .2s; }
.nav ul a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1.5px; background: var(--accent); transition: right .35s var(--ease); }
.nav ul a:not(.nav-cta):hover { color: #fff; }
.nav ul a:not(.nav-cta):hover::after { right: 0; }
.nav-cta { padding: .62rem 1.15rem; border-radius: 999px; background: var(--grad); color: #03110e !important; font-weight: 600 !important; }

.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.2); position: relative; }
.nav-toggle span:not(.sr) { position: absolute; left: 13px; right: 13px; height: 1.5px; background: #fff; transition: transform .3s var(--ease), top .3s; }
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 25px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { top: 21px; transform: rotate(-45deg); }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav ul {
    position: fixed; inset: 0; z-index: -1;
    flex-direction: column; align-items: flex-start; justify-content: center; gap: .3rem;
    padding: 5rem var(--gutter) 2rem;
    background: rgba(7, 11, 16, .97); backdrop-filter: blur(20px);
    opacity: 0; pointer-events: none; transition: opacity .35s;
  }
  .nav ul.open { opacity: 1; pointer-events: auto; }
  .nav ul a { font-family: var(--display); font-size: 2rem; font-weight: 600; font-stretch: 110%; }
  .nav ul a::after { display: none; }
  .nav-cta { margin-top: 1.5rem; display: inline-block; font-family: var(--body) !important; font-size: 1rem !important; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative; min-height: 100svh; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden; isolation: isolate; color: #fff;
}
@supports (min-height: 100svh) { .hero { min-height: 100svh; } }

.hero-slides { position: absolute; inset: 0; z-index: -2; }
.slide {
  position: absolute; inset: -2%;
  background: var(--img) center / cover no-repeat;
  opacity: 0; transform: scale(1.12);
  transition: opacity 1.6s ease, transform 8s linear;
}
.slide.is-active { opacity: 1; transform: scale(1.02); }

.hero-shade {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(7,11,16,.55) 0%, rgba(7,11,16,0) 22%),
    linear-gradient(0deg, rgba(7,11,16,.96) 0%, rgba(7,11,16,.55) 38%, rgba(7,11,16,.1) 70%),
    linear-gradient(90deg, rgba(7,11,16,.6) 0%, rgba(7,11,16,0) 60%);
}

.hero-inner { width: min(100% - 2 * var(--gutter), var(--max)); margin: 0 auto; padding: 9rem 0 2rem; }
.kicker { display: flex; align-items: center; gap: .8rem; color: rgba(255,255,255,.85); margin: 0 0 1.8rem; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(61,219,196,.6); } 70%, 100% { box-shadow: 0 0 0 12px rgba(61,219,196,0); } }

.hero-title {
  font-size: clamp(3.1rem, 9.2vw, 9rem);
  font-weight: 700; font-stretch: 112%;
  line-height: .9; letter-spacing: -.045em;
  margin: 0;
}
.hero-title .line { display: block; overflow: hidden; padding-bottom: .06em; }
.hero-title .line > span { display: inline-block; transform: translateY(105%); animation: rise 1.1s var(--ease-out) forwards; }
.hero-title .line:nth-child(2) > span { animation-delay: .12s; }
.hero-title .line:nth-child(3) > span { animation-delay: .24s; }
@keyframes rise { to { transform: none; } }
.hero-title em {
  font-style: normal; font-weight: 300;
  color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text;
}

.hero-foot { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem 4rem; flex-wrap: wrap; margin-top: 2.4rem; opacity: 0; animation: fade 1s .6s var(--ease) forwards; }
@keyframes fade { to { opacity: 1; } }
.lede { font-size: clamp(1.02rem, 1.4vw, 1.2rem); font-weight: 300; line-height: 1.6; max-width: 46ch; margin: 0; color: rgba(255,255,255,.86); }

.hero-index {
  width: min(100% - 2 * var(--gutter), var(--max)); margin: 0 auto 2.2rem;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem;
  border-top: 1px solid rgba(255,255,255,.18); padding-top: 1rem;
}
.hx { background: none; border: 0; padding: 0; text-align: left; display: grid; grid-template-columns: auto 1fr; gap: .2rem .8rem; color: rgba(255,255,255,.55); transition: color .3s; }
.hx.is-active, .hx:hover { color: #fff; }
.hx-l { font-family: var(--display); font-weight: 600; font-stretch: 110%; font-size: .95rem; }
.hx-bar { grid-column: 1 / -1; height: 2px; background: rgba(255,255,255,.15); margin-top: .5rem; overflow: hidden; }
.hx-bar i { display: block; height: 100%; width: 0; background: var(--grad); }
.hx.is-active .hx-bar i { animation: fill var(--dur, 6s) linear forwards; }
@keyframes fill { to { width: 100%; } }

.scroll-cue { position: absolute; right: var(--gutter); bottom: 6.5rem; width: 26px; height: 42px; border: 1.5px solid rgba(255,255,255,.5); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: #fff; animation: cue 1.8s infinite; }
@keyframes cue { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

@media (max-width: 700px) {
  .hero-index { grid-template-columns: repeat(4, 1fr); gap: .6rem; }
  .hx-n { display: none; }
  .hx-l { font-size: .8rem; }
  .scroll-cue { display: none; }
}

/* ---------- Marquee ---------- */

.marquee { overflow: hidden; border-block: 1px solid var(--line); background: var(--bg-2); padding: 1.3rem 0; }
.marquee-track { display: flex; width: max-content; animation: tick 40s linear infinite; }
.marquee span {
  font-family: var(--display); font-weight: 700; font-stretch: 120%;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem); letter-spacing: -.01em; text-transform: uppercase;
  color: transparent; -webkit-text-stroke: 1px rgba(238,242,246,.35);
  padding-left: 2.5rem; white-space: nowrap;
}
.marquee span:nth-child(odd) { color: var(--text); -webkit-text-stroke: 0; }
.marquee span::after { content: ""; display: inline-block; width: 10px; height: 10px; margin-left: 2.5rem; vertical-align: .25em; background: var(--accent); transform: rotate(45deg); }
@keyframes tick { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */

.section { padding-block: clamp(5rem, 11vw, 10rem); }
.section-alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.sec-head { margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
.sec-head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem 4rem; flex-wrap: wrap; }
.sec-head-row > div { max-width: 760px; }
.sec-lede { font-size: 1.08rem; font-weight: 300; color: var(--text-2); max-width: 44ch; margin: 0; }
.sec-head:not(.sec-head-row) .sec-lede { margin-top: 1.5rem; }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.split .sec-head { position: sticky; top: 110px; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split .sec-head { position: static; } }

/* ---------- Intro ---------- */

.intro { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(2.5rem, 6vw, 6rem); align-items: center; padding-block: clamp(5rem, 11vw, 10rem); }
.statement { font-size: clamp(1.9rem, 3.4vw, 3.1rem); font-weight: 500; font-stretch: 104%; line-height: 1.1; letter-spacing: -.025em; }
.body-lg { font-size: 1.1rem; font-weight: 300; color: var(--text-2); margin: 1.8rem 0; max-width: 54ch; }
.ticks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: .8rem 1.5rem; }
.ticks li { position: relative; padding-left: 1.8rem; font-size: .95rem; color: var(--text); }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .3em; width: 1.1rem; height: 1.1rem; border-radius: 50%;
  background: var(--accent-glow) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%233ddbc4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 70% no-repeat;
}

.intro-media { position: relative; aspect-ratio: 1 / 1.05; }
.im { position: absolute; border-radius: var(--radius); overflow: hidden; box-shadow: 0 40px 80px -40px rgba(0,0,0,.9); }
.im img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease-out); }
.im:hover img { transform: scale(1.05); }
.im-a { inset: 0 18% 22% 0; }
.im-b { inset: 46% 0 0 38%; border: 6px solid var(--bg); }
.badge-float {
  position: absolute; left: 4%; bottom: 4%;
  display: flex; align-items: center; gap: .9rem;
  padding: .9rem 1.2rem .9rem .9rem; border-radius: 12px;
  background: rgba(16, 23, 31, .75); backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.12);
  animation: bob 6s ease-in-out infinite;
}
@keyframes bob { 50% { transform: translateY(-8px); } }
.bf-sym { display: grid; place-items: center; width: 3rem; height: 3rem; border-radius: 8px; background: var(--grad); color: #03110e; font-family: var(--display); font-weight: 700; font-stretch: 115%; font-size: 1.3rem; }
.bf-txt { font-size: .82rem; color: var(--text-2); line-height: 1.35; }
.bf-txt b { display: block; color: var(--text); font-family: var(--display); font-weight: 600; font-size: .95rem; }

@media (max-width: 900px) {
  .intro { grid-template-columns: 1fr; }
  .intro-media { max-width: 560px; }
}
@media (max-width: 520px) { .ticks { grid-template-columns: 1fr; } }

/* ---------- Stats ---------- */

.stats { position: relative; overflow: hidden; padding-block: clamp(4.5rem, 9vw, 8rem); isolation: isolate; }
.stats-bg { position: absolute; inset: 0; z-index: -1; background: var(--img) center / cover; opacity: .55; }
.stats::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, var(--bg) 0%, rgba(7,11,16,.5) 30%, rgba(7,11,16,.5) 70%, var(--bg) 100%); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); overflow: hidden; backdrop-filter: blur(6px); }
.stat { background: rgba(7, 11, 16, .62); padding: clamp(1.5rem, 3vw, 2.5rem); }
.stat-n {
  display: block; font-family: var(--display); font-weight: 600; font-stretch: 115%;
  font-size: clamp(3rem, 5.6vw, 5rem); line-height: 1; letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
}
.stat-n i { font-family: var(--body); font-style: normal; font-weight: 300; font-size: .5em; margin-left: .06em; vertical-align: .75em; color: var(--accent); }
.stat p { margin: 1rem 0 0; font-size: .92rem; color: var(--text-2); font-weight: 300; }
.cite { font-family: var(--mono); font-size: .72rem; color: var(--accent); text-decoration: none; vertical-align: super; }
@media (max-width: 900px) { .stats-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .stats-grid { grid-template-columns: 1fr; } }

/* ---------- Bento sectors ---------- */

.bento {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: clamp(220px, 24vw, 330px);
}
.tile { position: relative; overflow: hidden; border-radius: var(--radius); isolation: isolate; background: var(--surface); }
.tile img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 1.2s var(--ease-out), filter .6s; filter: saturate(.9); }
.tile::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(5,8,12,.92) 0%, rgba(5,8,12,.35) 45%, rgba(5,8,12,0) 75%); transition: background .5s; }
.tile:hover img { transform: scale(1.07); filter: saturate(1.1); }
.tile-body { position: absolute; left: 0; right: 0; bottom: 0; padding: clamp(1.2rem, 2.5vw, 2rem); }
.tile-n { color: var(--accent); }
.tile h3 { font-size: clamp(1.4rem, 2.2vw, 2rem); font-stretch: 110%; margin: .4rem 0 .3rem; color: #fff; }
.tile p { margin: 0; max-width: 34ch; color: rgba(255,255,255,.8); font-size: .95rem; font-weight: 300;
  max-height: 0; opacity: 0; transition: max-height .5s var(--ease), opacity .4s; }
.tile:hover p, .tile:focus-within p { max-height: 6em; opacity: 1; }
@media (hover: none) { .tile p { max-height: none; opacity: 1; } }

.t-solar { grid-column: span 7; grid-row: span 2; }
.t-wind { grid-column: span 5; }
.t-storage { grid-column: span 5; }
.t-ev { grid-column: span 4; }
.t-grid { grid-column: span 4; }
.t-industry { grid-column: span 4; }
.t-solar h3 { font-size: clamp(2rem, 3.6vw, 3.4rem); }

@media (max-width: 900px) {
  .bento { grid-template-columns: 1fr 1fr; grid-auto-rows: 260px; }
  .bento > * { grid-column: span 1 !important; grid-row: span 1 !important; }
  .t-solar { grid-column: span 2 !important; }
}
@media (max-width: 560px) { .bento { grid-template-columns: 1fr; } .t-solar { grid-column: span 1 !important; } }

/* ---------- Parallax band ---------- */

.band { position: relative; overflow: hidden; min-height: 82vh; display: flex; align-items: center; isolation: isolate; }
.band-img { position: absolute; inset: -15% 0; z-index: -2; background: var(--img) center / cover; will-change: transform; filter: saturate(.45) contrast(1.1) brightness(.85); }
.band-shade { position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(7,11,16,.92) 0%, rgba(7,11,16,.6) 45%, rgba(7,11,16,.15) 100%); }
.band-inner { padding-block: 6rem; }
.band-quote { margin: 0; font-family: var(--display); font-weight: 700; font-stretch: 112%; font-size: clamp(2.8rem, 7vw, 6.6rem); line-height: .95; letter-spacing: -.04em; max-width: 12ch; }
.band-sub { max-width: 44ch; color: rgba(255,255,255,.82); font-weight: 300; font-size: 1.1rem; margin: 2rem 0 0; }

/* ---------- Materials ---------- */

.seg { display: inline-flex; padding: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; }
.seg button { background: none; border: 0; padding: .55rem 1.2rem; border-radius: 999px; font-size: .88rem; font-weight: 500; color: var(--muted); transition: color .2s; }
.seg button[aria-selected="true"] { background: var(--grad); color: #03110e; font-weight: 600; }

.materials { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
.mat { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .45s var(--ease), border-color .3s, box-shadow .45s; }
.mat:hover { transform: translateY(-6px); border-color: rgba(61,219,196,.4); box-shadow: 0 30px 60px -30px rgba(61,219,196,.35); }
.mat-img { aspect-ratio: 4 / 3; overflow: hidden; position: relative; }
.mat-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease-out); }
.mat-img-dark { background: #000; }
.mat-img-dark img { object-fit: contain; }
.mat:hover .mat-img img { transform: scale(1.06); }
.mat-img::after { content: ""; position: absolute; inset: auto 0 0 0; height: 40%; background: linear-gradient(0deg, var(--surface), transparent); }
.mat-body { display: flex; flex-direction: column; flex: 1; padding: 0 1.5rem 1.5rem; margin-top: -1.2rem; position: relative; }
.mat-kind { color: var(--muted); margin: 0; }
.formula { font-family: var(--display); font-weight: 600; font-stretch: 110%; font-size: clamp(1.7rem, 2.3vw, 2.15rem); line-height: 1; margin: .9rem 0 .7rem; letter-spacing: -.02em; color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; }
.mat h3 { font-size: 1.15rem; }
.mat-body > p:not([class]) { color: var(--text-2); font-weight: 300; font-size: .93rem; margin: .7rem 0 1.4rem; }
.check { margin: auto 0 0; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .88rem; }
.check span { display: block; color: var(--muted); font-size: .64rem; margin-bottom: .3rem; }
@media (max-width: 1080px) { .materials { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .materials { grid-template-columns: 1fr; } }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: 1.05rem 1.2rem; border-bottom: 1px solid var(--line); }
tbody tr:last-child > * { border-bottom: 0; }
thead th { font-family: var(--display); font-weight: 600; font-stretch: 110%; font-size: 1.25rem; color: var(--accent); background: var(--surface-2); }
thead th small { display: block; font-family: var(--mono); font-size: .64rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-top: .3rem; font-weight: 500; }
tbody th { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 500; width: 9rem; }
td { color: var(--text-2); font-weight: 300; }

/* ---------- Process steps ---------- */

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; counter-reset: s; }
.stp { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--surface); border: 1px solid var(--line); transition: transform .45s var(--ease); }
.stp:hover { transform: translateY(-6px); }
.stp figure { aspect-ratio: 4 / 5; overflow: hidden; }
.stp img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease-out); }
.stp:hover img { transform: scale(1.07); }
.stp-body { position: absolute; inset: auto 0 0 0; padding: 1.5rem; background: linear-gradient(0deg, rgba(5,8,12,.96) 10%, rgba(5,8,12,.6) 65%, transparent); padding-top: 4rem; }
.stp-n { color: var(--accent); }
.stp h3 { font-size: 1.6rem; font-stretch: 112%; margin: .35rem 0 .45rem; }
.stp p { margin: 0 0 .9rem; font-size: .92rem; color: rgba(255,255,255,.78); font-weight: 300; }
.tag { color: var(--accent); opacity: .85; }
.steps::before { content: none; }
@media (max-width: 1000px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .stp figure { aspect-ratio: 4 / 4.2; } }

/* ---------- Sustainability ---------- */

.sustain { display: grid; grid-template-columns: 1fr 1fr; min-height: 90vh; }
.sustain-media { position: relative; overflow: hidden; }
.sustain-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sustain-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 60%, var(--bg)); }
.sustain-cap { position: absolute; left: 1.5rem; bottom: 1.5rem; z-index: 1; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; padding: .45rem .8rem; border-radius: 999px; background: rgba(7,11,16,.65); backdrop-filter: blur(8px); color: rgba(255,255,255,.85); }
.sustain-copy { padding: clamp(4rem, 8vw, 8rem) var(--gutter) clamp(4rem, 8vw, 8rem) clamp(2rem, 5vw, 5rem); max-width: 720px; }
.sustain-copy .sec-lede { margin: 1.5rem 0 2.2rem; }
.sustain-copy .accordion { margin-bottom: 2rem; }
@media (max-width: 900px) {
  .sustain { grid-template-columns: 1fr; }
  .sustain-media { min-height: 60vw; }
  .sustain-media::after { background: linear-gradient(180deg, transparent 60%, var(--bg)); }
  .sustain-copy { padding-inline: var(--gutter); }
}

/* ---------- Accordion ---------- */

.accordion { border-top: 1px solid var(--line-2); }
details { border-bottom: 1px solid var(--line); }
summary {
  list-style: none; cursor: pointer; position: relative;
  display: flex; align-items: baseline; gap: 1rem;
  padding: 1.35rem 3rem 1.35rem 0;
  font-family: var(--display); font-size: clamp(1.1rem, 1.7vw, 1.3rem); font-weight: 500; font-stretch: 105%; line-height: 1.25;
  transition: color .2s;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; position: absolute; right: 0; top: 50%; width: 32px; height: 32px; margin-top: -16px; border-radius: 50%;
  border: 1px solid var(--line-2);
  background:
    linear-gradient(currentColor, currentColor) center / 11px 1.5px no-repeat,
    linear-gradient(currentColor, currentColor) center / 1.5px 11px no-repeat;
  transition: transform .35s var(--ease), border-color .3s, background-color .3s;
}
details[open] summary { color: var(--accent); }
details[open] summary::after { transform: rotate(45deg); border-color: var(--accent); }
summary:hover { color: var(--accent); }
.acc-n { font-family: var(--mono); font-size: .72rem; color: var(--muted); }
details p { margin: 0 0 1.6rem; color: var(--text-2); font-weight: 300; max-width: 60ch; }

/* ---------- Chemistry ---------- */

.chems { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.chem { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.6rem, 3vw, 2.4rem); overflow: hidden; }
.chem-feature { background: linear-gradient(160deg, rgba(61,219,196,.14), var(--surface) 55%); border-color: rgba(61,219,196,.35); }
.chem-sym { margin: 0; font-family: var(--display); font-weight: 700; font-stretch: 122%; font-size: 4rem; line-height: .9; letter-spacing: -.03em; }
.chem-feature .chem-sym { color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; }
.chem h3 { margin-top: 1.3rem; font-size: 1.15rem; }
.chem-sub { color: var(--muted); margin: .4rem 0 1rem; }
.chem > p:not([class]) { color: var(--text-2); font-weight: 300; font-size: .95rem; margin: 0 0 1.6rem; }
.meters { margin: 0; display: grid; gap: .8rem; }
.meters div { display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; gap: 1rem; font-size: .85rem; }
.meters dt { color: var(--text-2); }
.meters dd { margin: 0; }
.m { display: block; height: 6px; border-radius: 99px; background: var(--line); position: relative; overflow: hidden; }
.m::after { content: ""; position: absolute; inset: 0 auto 0 0; width: 0; border-radius: 99px; background: var(--grad); transition: width 1.4s var(--ease-out); }
.chem.in .m::after { width: calc(var(--v) * 20%); }
@media (max-width: 900px) { .chems { grid-template-columns: 1fr; } }

/* ---------- Gallery strip ---------- */

.strip { overflow: hidden; padding-block: 0 clamp(4rem, 8vw, 7rem); }
.strip-track { display: flex; gap: 1rem; width: max-content; animation: tick 60s linear infinite; }
.strip:hover .strip-track { animation-play-state: paused; }
.strip figure { position: relative; width: clamp(240px, 26vw, 380px); aspect-ratio: 4 / 5; border-radius: var(--radius); overflow: hidden; }
.strip img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease-out); }
.strip figure:hover img { transform: scale(1.06); }
.strip figcaption { position: absolute; left: 1rem; bottom: 1rem; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; padding: .4rem .75rem; border-radius: 999px; background: rgba(7,11,16,.65); backdrop-filter: blur(8px); }

/* ---------- Builder ---------- */

.builder { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
@media (max-width: 960px) { .builder { grid-template-columns: 1fr; } }

.progress { display: flex; align-items: center; gap: 1rem; color: var(--muted); margin: 0 0 1.5rem; }
.bar { flex: 1; height: 3px; border-radius: 99px; background: var(--line); position: relative; overflow: hidden; }
#progress-bar { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--grad); transition: width .5s var(--ease); }

fieldset { border: 0; border-top: 1px solid var(--line); margin: 0; padding: 1.4rem 0 1.6rem; display: grid; gap: 1rem; min-width: 0; }
legend { float: left; width: 100%; padding: 0; margin-bottom: .2rem; font-family: var(--display); font-size: 1.15rem; font-weight: 600; font-stretch: 106%; display: flex; align-items: center; gap: .8rem; }
legend span { display: inline-grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; border: 1px solid var(--line-2); font-family: var(--mono); font-size: .68rem; font-weight: 500; color: var(--muted); transition: all .3s; }
fieldset.done legend span { background: var(--grad); border-color: transparent; color: #03110e; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .row { grid-template-columns: 1fr; } }

form label { display: grid; gap: .45rem; font-size: .82rem; color: var(--muted); font-weight: 500; }
input:not([type="checkbox"]), select, textarea {
  width: 100%; font: inherit; font-size: 1rem; font-weight: 400; color: var(--text);
  background: var(--bg); border: 1px solid var(--line-2); border-radius: 10px;
  padding: .8rem .9rem; transition: border-color .2s, box-shadow .2s;
}
select option { background: var(--bg-2); color: var(--text); }
input::placeholder, textarea::placeholder { color: #566475; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-glow); }
textarea { resize: vertical; }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chips label { display: inline-block; cursor: pointer; }
.chips input { position: absolute; opacity: 0; pointer-events: none; }
.chips span { display: inline-block; padding: .55rem 1rem; border: 1px solid var(--line-2); border-radius: 999px; font-size: .88rem; color: var(--text-2); background: var(--bg); transition: all .2s; }
.chips span:hover { border-color: var(--muted); }
.chips input:checked + span { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }
.chips input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.paper { position: sticky; top: 100px; background: var(--bg); border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; box-shadow: 0 40px 90px -40px rgba(0,0,0,.95), 0 0 0 1px rgba(61,219,196,.05); }
.paper-head { display: flex; justify-content: space-between; align-items: center; padding: .9rem 1.4rem; border-bottom: 1px solid var(--line); background: var(--surface); font-family: var(--mono); font-size: .78rem; color: var(--muted); }
.paper-dots { display: flex; gap: 6px; }
.paper-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.paper-dots i:first-child { background: var(--accent); }
#brief-out { margin: 0; padding: 1.4rem; min-height: 22rem; max-height: 30rem; overflow: auto; font-family: var(--mono); font-size: .8rem; line-height: 1.75; white-space: pre-wrap; word-break: break-word; color: var(--text-2); }
.paper-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; padding: 1.1rem 1.4rem 0; border-top: 1px solid var(--line); }
.paper .btn { padding: .75rem 1.2rem; font-size: .88rem; }
.paper .fine { padding: 0 1.4rem 1.3rem; margin-top: 1rem; }
@media (max-width: 960px) { .paper { position: static; } }

/* ---------- CTA ---------- */

.cta { position: relative; overflow: hidden; isolation: isolate; padding-block: clamp(7rem, 16vw, 13rem); }
.cta-bg { position: absolute; inset: -15% 0; z-index: -2; background: var(--img) center / cover; will-change: transform; }
.cta-shade { position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(7,11,16,.92) 10%, rgba(7,11,16,.45) 70%, rgba(7,11,16,.2)), linear-gradient(0deg, var(--bg) 0%, transparent 25%); }
.cta h2 { font-size: clamp(2.6rem, 6.4vw, 6rem); max-width: 13ch; }
.cta p:not(.label) { font-size: 1.15rem; font-weight: 300; color: rgba(255,255,255,.85); margin: 1.6rem 0 2.2rem; max-width: 42ch; }

/* ---------- Footer ---------- */

.footer { background: var(--bg); color: var(--muted); padding-top: 5rem; overflow: hidden; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; padding-bottom: 3rem; }
.foot-tag { font-size: .98rem; font-weight: 300; max-width: 30ch; color: var(--text-2); margin-top: 1.2rem; }
.footer .label { color: var(--text-2); }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.footer a { text-decoration: none; transition: color .2s; }
.footer a:hover { color: var(--accent); }
.foot-sources { border-top: 1px solid var(--line); }
.foot-sources details { border: 0; }
.foot-sources summary { font-family: var(--mono); font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; font-weight: 500; padding-block: 1.2rem; color: var(--muted); }
.foot-sources summary::after { width: 26px; height: 26px; margin-top: -13px; }
.credits { display: grid; grid-template-columns: 1fr 1.4fr; gap: 2rem; padding-bottom: 1.5rem; font-size: .82rem; line-height: 1.6; }
.credits ol { margin: 0; padding-left: 1.2rem; display: grid; gap: .3rem; }
.credits li:target { color: var(--accent); }
.img-credits a { color: var(--text-2); text-decoration: underline; text-underline-offset: .2em; }
@media (max-width: 760px) { .credits { grid-template-columns: 1fr; } }
.foot-mark {
  font-family: var(--display); font-weight: 800; font-stretch: 125%; text-transform: uppercase;
  font-size: clamp(2.2rem, 9vw, 10rem); line-height: .82; letter-spacing: -.04em; white-space: nowrap; text-align: center;
  color: transparent; -webkit-text-stroke: 1px rgba(61,219,196,.25);
  margin: 1rem 0 -.08em; user-select: none;
}
.foot-base { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 1.5rem; border-top: 1px solid var(--line); font-size: .85rem; position: relative; background: var(--bg); }
.foot-base p { margin: 0; }
@media (max-width: 800px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }

/* ---------- Reveal ---------- */

.js .reveal { opacity: 0; transform: translateY(32px); transition: opacity 1s var(--ease-out), transform 1s var(--ease-out); transition-delay: var(--d, 0s); }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal-img { clip-path: inset(100% 0 0 0); transition: clip-path 1.4s var(--ease-out); transition-delay: var(--d, 0s); }
.js .reveal-img.in { clip-path: inset(0 0 0 0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .marquee-track, .strip-track { animation: none !important; }
  .js .reveal, .js .reveal-img { opacity: 1; transform: none; clip-path: none; }
}