@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Oswald:wght@500;600;700&display=swap');

:root {
  --ink: #11130f;
  --cream: #f1eee4;
  --paper: #faf8f2;
  --lime: #d7ff39;
  --orange: #ff5c35;
  --line: rgba(17, 19, 15, 0.18);
  --display: 'Oswald', Impact, sans-serif;
  --body: 'DM Sans', Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cream); color: var(--ink); font-family: var(--body); overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .8rem 1rem; background: var(--lime); color: var(--ink); font-weight: 700; }
.skip-link:focus { top: 1rem; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 20; height: 108px; display: flex; align-items: center; justify-content: space-between; padding: 0 4vw; color: white; border-bottom: 1px solid rgba(255,255,255,.22); }
.brand { display: flex; align-items: center; gap: .7rem; font-family: var(--display); font-size: 1.05rem; font-weight: 700; line-height: .85; text-transform: uppercase; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 46px; aspect-ratio: 1; border-radius: 50%; background: var(--lime); color: var(--ink); font: 700 .8rem var(--body); letter-spacing: -.08em; transform: rotate(-8deg); }
nav { display: flex; align-items: center; gap: clamp(1rem, 3vw, 3rem); font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
nav a:not(.nav-cta) { padding: 1rem 0; }
.nav-cta { padding: .85rem 1.2rem; color: var(--ink); background: var(--lime); border-radius: 99px; }

.story { height: 620svh; background: #111; }
.stage { position: sticky; top: 0; height: 100svh; min-height: 560px; overflow: hidden; color: white; background: #111 url('./assets/cantera-poster.png?v=2') center / cover no-repeat; }
.story-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.84) contrast(1.08); }
.video-wash { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,8,5,.84) 0%, rgba(6,8,5,.24) 51%, rgba(6,8,5,.48) 100%), linear-gradient(0deg, rgba(6,8,5,.46), transparent 48%); }
.grain { position: absolute; inset: -50%; opacity: .09; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E"); animation: grain .25s steps(2) infinite; pointer-events: none; }
@keyframes grain { 0%{transform:translate(2%, -1%)} 50%{transform:translate(-1%, 2%)} 100%{transform:translate(1%, 1%)} }
.loading { position: absolute; z-index: 8; left: 4vw; bottom: 3rem; display: flex; gap: .7rem; align-items: center; font-size: .7rem; text-transform: uppercase; letter-spacing: .12em; transition: opacity .35s; }
.loading span { width: 8px; height: 8px; border-radius: 50%; background: var(--lime); animation: blink .8s alternate infinite; }
.is-ready .loading { opacity: 0; pointer-events: none; }
@keyframes blink { to { opacity: .25; } }

.chapter-stack { position: absolute; inset: 0; z-index: 5; }
.chapter { --chapter-opacity: 0; --chapter-shift: 34px; position: absolute; top: 50%; left: 7vw; width: min(690px, 62vw); opacity: var(--chapter-opacity); transform: translateY(calc(-44% + var(--chapter-shift))); pointer-events: none; }
.chapter.is-interactive { pointer-events: auto; }
.chapter--right { left: auto; right: 8vw; width: min(580px, 50vw); }
.chapter--final { top: 52%; }
.eyebrow, .section-kicker { display: flex; gap: .75rem; align-items: center; margin: 0 0 1.4rem; font-size: .7rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; color: var(--lime); }
h1, h2, h3, p { margin-top: 0; }
.chapter h1, .chapter h2 { margin-bottom: 1.4rem; font: 600 clamp(3.6rem, 7.4vw, 8.2rem)/.9 var(--display); letter-spacing: -.055em; text-transform: uppercase; }
.chapter h2 { font-size: clamp(3rem, 6vw, 6.6rem); }
.chapter em, .intro em, .method em, .contact em { color: var(--lime); font-style: normal; }
.chapter-copy { width: min(510px, 95%); margin-bottom: 1.8rem; font-size: clamp(.95rem, 1.35vw, 1.18rem); line-height: 1.55; color: rgba(255,255,255,.78); }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 2rem; min-width: 220px; padding: 1rem 1.25rem; border: 0; border-radius: 2px; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; cursor: pointer; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-3px); }
.button--lime { background: var(--lime); color: var(--ink); }
.button--dark { width: 100%; background: var(--ink); color: white; }
.age-pills { display: flex; flex-wrap: wrap; gap: .6rem; }
.age-pills span { padding: .7rem 1rem; border: 1px solid rgba(255,255,255,.45); border-radius: 99px; font: 600 1rem var(--display); }
.mini-stats { display: flex; gap: 1.4rem; padding: 0; list-style: none; }
.mini-stats li { display: grid; gap: .25rem; color: rgba(255,255,255,.7); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; }
.mini-stats strong { color: var(--lime); font: 600 1.6rem var(--display); }
.story-rail { position: absolute; z-index: 9; right: 3vw; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; align-items: center; gap: .75rem; }
.rail-label { writing-mode: vertical-rl; font-size: .56rem; text-transform: uppercase; letter-spacing: .16em; }
.rail-track { position: relative; width: 2px; height: 150px; background: rgba(255,255,255,.28); overflow: hidden; }
.rail-progress { position: absolute; left: 0; top: 0; width: 100%; height: 100%; background: var(--lime); transform-origin: top; transform: scaleY(0); }
.rail-number { font: 600 .8rem var(--display); }
.scroll-cue { position: absolute; z-index: 9; left: 50%; bottom: 2rem; transform: translateX(-50%); display: flex; align-items: center; gap: .75rem; font-size: .58rem; text-transform: uppercase; letter-spacing: .16em; transition: opacity .3s; }
.scroll-cue span { width: 22px; height: 34px; border: 1px solid rgba(255,255,255,.55); border-radius: 99px; position: relative; }
.scroll-cue span::after { content: ''; position: absolute; top: 7px; left: 9px; width: 2px; height: 7px; background: var(--lime); animation: scroll 1.4s infinite; }
@keyframes scroll { 60%,100% { transform: translateY(10px); opacity: 0; } }

.intro, .method, .contact { padding: clamp(5rem, 10vw, 10rem) 6vw; }
.section-kicker { color: #66695f; }
.section-kicker::before { content: ''; width: 36px; height: 2px; background: var(--orange); }
.intro-grid { display: grid; grid-template-columns: 1.4fr .6fr; gap: 5vw; align-items: end; margin-bottom: 5rem; }
.intro-grid h2, .method h2, .contact h2 { margin: 0; font: 600 clamp(3.5rem, 7vw, 7.8rem)/.9 var(--display); letter-spacing: -.055em; text-transform: uppercase; }
.intro-grid em, .contact em { color: var(--orange); }
.intro-grid > p { max-width: 420px; margin: 0; color: #5d6057; line-height: 1.65; }
.program-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.program-card { min-height: 390px; padding: 1.5rem; display: flex; flex-direction: column; border: 1px solid var(--line); background: var(--paper); position: relative; transition: transform .25s; }
.program-card + .program-card { border-left: 0; }
.program-card:hover { transform: translateY(-8px); z-index: 2; }
.program-card--lime { background: var(--lime); }
.program-card--dark { background: var(--ink); color: white; }
.program-number { font: 500 .8rem var(--display); opacity: .6; }
.program-age { margin-top: auto; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; }
.program-card h3 { margin-bottom: .8rem; font: 600 clamp(2rem, 3vw, 3.2rem)/1 var(--display); text-transform: uppercase; }
.program-card > p:last-of-type { min-height: 4.5rem; margin-bottom: 0; font-size: .88rem; line-height: 1.5; opacity: .72; }
.card-arrow { position: absolute; top: 1.2rem; right: 1.2rem; font-size: 1.4rem; }

.method { display: grid; grid-template-columns: 1.1fr .9fr; gap: 8vw; color: white; background: var(--ink); }
.method-title { position: sticky; top: 10rem; align-self: start; }
.method .section-kicker { color: rgba(255,255,255,.55); }
.method-list { margin: 0; padding: 0; list-style: none; }
.method-list li { display: grid; grid-template-columns: 52px 1fr; gap: 1rem; padding: 2.5rem 0; border-top: 1px solid rgba(255,255,255,.18); }
.method-list > li > span { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--lime); color: var(--ink); font: 700 .7rem var(--body); }
.method-list h3 { margin-bottom: .7rem; font: 600 clamp(1.6rem, 2.5vw, 2.5rem) var(--display); text-transform: uppercase; }
.method-list p { max-width: 400px; margin: 0; color: rgba(255,255,255,.55); line-height: 1.55; }

.contact { display: grid; grid-template-columns: 1.05fr .75fr; gap: 10vw; background: var(--lime); }
.contact .section-kicker { color: #4b531e; }
.contact-copy > p:not(.section-kicker) { max-width: 520px; margin: 2rem 0; line-height: 1.65; }
.contact-note { display: inline-flex; gap: .7rem; align-items: center; padding: .7rem 1rem; background: rgba(255,255,255,.45); font-size: .78rem; font-weight: 700; text-transform: uppercase; }
.contact-note span { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: var(--lime); }
.trial-form { padding: clamp(1.5rem, 4vw, 3rem); background: var(--paper); box-shadow: 14px 14px 0 rgba(17,19,15,.15); }
.trial-form label { display: grid; gap: .55rem; margin-bottom: 1.2rem; font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.trial-form input, .trial-form select { width: 100%; padding: .85rem 0; border: 0; border-bottom: 1px solid #b8b9b2; border-radius: 0; background: transparent; outline: none; }
.trial-form input:focus, .trial-form select:focus { border-color: var(--ink); }
.form-status { min-height: 1.2rem; margin: .8rem 0 0; font-size: .78rem; line-height: 1.4; }
footer { display: grid; grid-template-columns: 1fr 1fr auto; gap: 2rem; align-items: end; padding: 4rem 6vw; color: white; background: var(--ink); }
.brand--footer { width: fit-content; }
footer p { margin: 0; color: rgba(255,255,255,.55); font-size: .8rem; line-height: 1.55; }
.footer-note { text-align: right; text-transform: uppercase; letter-spacing: .08em; }

@media (max-width: 820px) {
  .site-header { height: 82px; padding: 0 1.2rem; }
  nav a:not(.nav-cta) { display: none; }
  .nav-cta { font-size: .65rem; }
  .story { height: 560svh; }
  .story-video { object-position: 58% center; }
  .video-wash { background: linear-gradient(0deg, rgba(5,7,4,.92) 0%, rgba(5,7,4,.45) 58%, rgba(5,7,4,.38) 100%); }
  .chapter, .chapter--right { top: auto; bottom: 11vh; left: 1.25rem; right: 1.25rem; width: auto; transform: translateY(var(--chapter-shift)); }
  .chapter h1, .chapter h2 { font-size: clamp(2.8rem, 13.5vw, 5.2rem); }
  .chapter-copy { font-size: .9rem; margin-bottom: 1.2rem; }
  .story-rail { right: .8rem; top: 26%; }
  .rail-label { display: none; }
  .rail-track { height: 90px; }
  .scroll-cue { display: none; }
  .intro, .method, .contact { padding: 5rem 1.25rem; }
  .intro-grid, .method, .contact { grid-template-columns: 1fr; }
  .intro-grid { gap: 2rem; margin-bottom: 3rem; }
  .program-grid { grid-template-columns: 1fr 1fr; }
  .program-card { min-height: 310px; }
  .program-card + .program-card { border-left: 1px solid var(--line); }
  .method-title { position: static; }
  .trial-form { box-shadow: 8px 8px 0 rgba(17,19,15,.15); }
  footer { grid-template-columns: 1fr; align-items: start; }
  .footer-note { text-align: left; }
}

@media (max-width: 520px) {
  .brand { font-size: .9rem; }
  .brand-mark { width: 40px; }
  .chapter { bottom: 8vh; }
  .chapter h1, .chapter h2 { margin-bottom: 1rem; }
  .eyebrow { margin-bottom: 1rem; }
  .mini-stats { gap: .8rem; }
  .program-grid { grid-template-columns: 1fr; }
  .program-card { min-height: 285px; }
  .program-card + .program-card { border-top: 0; }
}