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

:root {
  --ink: #0b0d10;
  --ink-soft: #2a2f36;
  --paper: #f6f6f6;
  --white: #ffffff;
  --muted: #aeb4bd;
  --line: rgba(255, 255, 255, 0.14);
  --accent: #e7eaee;
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--white);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; font-family: Poppins, Arial, sans-serif; line-height: 1.15; }
p { margin: 0 0 1.3rem; }

.container { width: min(calc(100% - 48px), var(--max-width)); margin-inline: auto; }
.narrow { max-width: 820px; }
.section { padding: 100px 0; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: white; color: black; }
.skip-link:focus { top: 16px; }
.eyebrow { margin-bottom: 18px; color: var(--muted); font-size: .74rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; }

.site-header { position: relative; z-index: 10; min-height: 82px; border-bottom: 1px solid var(--line); background: var(--ink); }
.header-inner { width: min(calc(100% - 48px), 1400px); min-height: 108px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-block; width: min(375px, 56vw); }
.login-link { display: inline-flex; align-items: center; justify-content: center; min-width: 188px; min-height: 50px; padding: 10px 24px; border-radius: 0; background: #e50914; color: white; text-decoration: none; font-size: 1rem; font-weight: 500; letter-spacing: 0; text-transform: uppercase; transition: background .2s; }
.login-link:hover, .login-link:focus-visible { background: #ff1a25; }
.user-icon { display: none; width: 30px; height: 30px; position: relative; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; }
.user-icon::before { content: ''; position: absolute; width: 7px; height: 7px; left: 10px; top: 6px; border: 1px solid white; border-radius: 50%; }
.user-icon::after { content: ''; position: absolute; width: 14px; height: 7px; left: 7px; bottom: 5px; border: 1px solid white; border-radius: 10px 10px 0 0; border-bottom: 0; }

.hero { min-height: 600px; height: calc(100vh - 108px); max-height: 820px; position: relative; display: grid; place-items: center; overflow: hidden; background: url('images/hero-pressure.png') center top / cover no-repeat; }
.hero::before, .hero::after { content: none; }
.hero-overlay { position: absolute; inset: 0; background: rgba(5, 8, 10, .42); }
.hero-content { position: relative; z-index: 1; padding: 40px 0; text-align: center; }
.hero .eyebrow { display: none; }
.hero h1 { max-width: none; font-size: clamp(2.9rem, 4vw, 4.55rem); letter-spacing: -.04em; }
.hero-question { max-width: 1000px; margin: 12px auto 0; color: white; font-size: clamp(1.05rem, 1.5vw, 1.45rem); line-height: 1.45; }

.intro { background: var(--paper); color: var(--ink-soft); }
.intro h2 { margin-bottom: 38px; color: var(--ink); font-size: clamp(2rem, 4vw, 3.4rem); letter-spacing: -.035em; }
.intro p { font-size: 1.08rem; }

.research { background: var(--ink); }
.section-heading { max-width: 760px; margin-bottom: 60px; }
.section-heading h2, .collaboration h2 { margin-bottom: 20px; font-size: clamp(2.4rem, 5vw, 4.7rem); letter-spacing: -.04em; }
.section-heading > p:last-child { color: var(--muted); font-size: 1.05rem; }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.research-card { position: relative; min-height: 520px; padding: 48px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.card-number { display: block; margin-bottom: 42px; color: #707780; font-family: Poppins, sans-serif; font-size: .78rem; letter-spacing: .15em; }
.research-card h3 { max-width: 500px; margin-bottom: 22px; font-size: clamp(1.55rem, 3vw, 2.3rem); letter-spacing: -.025em; }
.research-card h4 { margin: 32px 0 12px; color: var(--accent); font-family: Inter, sans-serif; font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; }
.research-card p, .research-card li { color: #c7ccd2; }
.research-card ul { margin: 0; padding-left: 1.2rem; }
.research-card li { margin-bottom: .7rem; padding-left: .35rem; }
.research-card-wide { grid-column: 1 / -1; min-height: 0; }

.collaboration { background: var(--paper); color: var(--ink); }
.collaboration-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.collaboration .eyebrow { color: #707780; }
.collaboration-copy { max-width: 650px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; margin-top: 18px; padding: 12px 24px; border: 1px solid var(--ink); background: var(--ink); color: var(--white); font-weight: 600; letter-spacing: .03em; text-decoration: none; transition: background .2s, color .2s; }
.button:hover, .button:focus-visible { background: transparent; color: var(--ink); }

.site-footer { border-top: 1px solid var(--line); background: var(--ink); }
.footer-inner { min-height: 150px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: center; gap: 32px; }
.footer-brand { width: 190px; }
.footer-inner p { justify-self: center; margin: 0; color: var(--muted); font-size: .82rem; text-align: center; }
.social-link { justify-self: end; display: inline-flex; align-items: center; gap: 12px; color: var(--muted); font-size: .82rem; text-decoration: none; }
.social-link img { width: 30px; }
.social-link:hover, .social-link:focus-visible { color: white; }

.account-page { min-height: 100vh; background: var(--ink); }
.account-main { min-height: calc(100vh - 82px); display: grid; place-items: center; padding: 48px 24px; background: radial-gradient(circle at 50% 0%, #252b33 0, var(--ink) 56%); }
.account-card { width: min(100%, 480px); padding: 48px; border: 1px solid var(--line); background: rgba(15,19,24,.92); }
.account-card h1 { margin-bottom: 14px; font-size: clamp(2.2rem, 6vw, 3.5rem); letter-spacing: -.04em; }
.form-intro, .status-card > p:not(.eyebrow) { color: var(--muted); }
.form-intro a { color: white; text-underline-offset: 3px; }
.account-card form { display: grid; margin-top: 32px; }
.account-card label { margin-bottom: 7px; font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.account-card input { width: 100%; min-height: 48px; margin-bottom: 22px; border: 1px solid #555c65; border-radius: 0; background: #15191e; color: white; font: inherit; padding: 10px 12px; }
.account-card input:focus { outline: 2px solid white; outline-offset: 2px; }
.form-button { width: 100%; border-color: white; background: white; color: var(--ink); cursor: pointer; font: inherit; }
.form-button:hover, .form-button:focus-visible { background: transparent; color: white; }
.text-link { display: inline-block; margin-top: 28px; color: var(--muted); }
.status-card { text-align: center; }
.status-card .button { border-color: white; background: white; color: var(--ink); }
.status-card .button:hover, .status-card .button:focus-visible { background: transparent; color: white; }
.status-icon { display: grid; place-items: center; width: 56px; height: 56px; margin: 0 auto 28px; border: 1px solid #d1d5da; border-radius: 50%; font: 300 2rem/1 Inter, sans-serif; }

@media (max-width: 1024px) {
  .section { padding: 84px 0; }
  .hero { min-height: 620px; height: calc(100vh - 82px); background-image: url('images/hero-pressure-mobile.png'); background-position: center center; }
  .research-grid { grid-template-columns: 1fr; }
  .research-card, .research-card-wide { grid-column: auto; min-height: 0; }
  .collaboration-grid { grid-template-columns: 1fr; gap: 30px; }
  .collaboration-copy { max-width: 760px; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 32px), var(--max-width)); }
  .section { padding: 72px 0; }
  .site-header, .header-inner { min-height: 76px; }
  .header-inner { width: min(calc(100% - 32px), 1400px); }
  .brand { width: min(235px, 55vw); }
  .login-link { min-width: 104px; min-height: 42px; padding: 8px 16px; border-radius: 0; font-size: .85rem; }
  .hero { min-height: 620px; }
  .hero-content { padding-bottom: 58px; }
  .hero h1 { font-size: clamp(2.5rem, 8vw, 3.3rem); }
  .research-card, .research-card-wide { grid-column: auto; min-height: 0; padding: 34px 26px 38px; }
  .card-number { margin-bottom: 28px; }
  .collaboration-grid { gap: 24px; }
  .footer-inner { min-height: 240px; grid-template-columns: 1fr; justify-items: center; gap: 18px; padding-block: 40px; }
  .footer-brand, .footer-inner p, .social-link { justify-self: center; }
  .footer-inner p { grid-row: auto; }
  .account-card { padding: 34px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}