/* NanoSim public landing page. Builds on the tokens in style.css. */
body.landing { background: var(--steel); color: var(--ink); height: auto; font-size: 17px; line-height: 1.55; }
.landing a { color: inherit; }
.landing h1, .landing h2, .landing h3 { font-family: var(--display); letter-spacing: -0.01em; }

/* ---------------------------------------------------------------- nav */
.l-nav {
  position: absolute; top: 0; left: 0; right: 0; z-index: 3;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 48px); color: #eef2f5;
}
.l-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 24px/1 var(--display); }
.l-nav nav { display: flex; gap: 8px; align-items: center; }
.l-nav nav a { text-decoration: none; font-weight: 600; font-size: 15px; padding: 9px 14px; border-radius: 4px; }
.l-nav nav a:hover { background: rgba(255, 255, 255, 0.08); }
.l-nav .l-nav-cta { border: 1px solid rgba(238, 242, 245, 0.45); background: rgba(12, 31, 51, 0.7); }
.l-nav nav a { background-color: rgba(12, 31, 51, 0.55); }

/* ---------------------------------------------------------------- hero */
.l-hero {
  position: relative; min-height: min(860px, 100svh); overflow: hidden;
  background: var(--field); color: #eef2f5;
  display: flex; align-items: center;
  padding: 120px clamp(16px, 5vw, 72px) 96px;
}
#hero-field { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.l-hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, rgba(12, 31, 51, 0.92) 0%, rgba(12, 31, 51, 0.72) 42%, rgba(12, 31, 51, 0) 72%);
}
.l-hero-copy { position: relative; z-index: 2; max-width: 640px; pointer-events: none; }
.l-hero-copy a, .l-hero-copy button, .l-hero-copy form { pointer-events: auto; }
.l-hero h1 { font-size: clamp(44px, 6.4vw, 88px); line-height: 1.02; font-weight: 700; margin: 0 0 24px; }
.l-lead { font-size: clamp(18px, 1.6vw, 21px); color: #c9d8e6; margin: 0 0 32px; max-width: 34em; }
.l-ctas { display: flex; flex-wrap: wrap; gap: 12px; align-items: stretch; }
.l-ctas form { margin: 0; display: flex; }
.l-btn {
  display: inline-flex; flex-direction: column; justify-content: center; align-items: flex-start;
  font: 700 18px/1.15 var(--body); padding: 14px 22px; border-radius: 6px; text-decoration: none; cursor: pointer;
}
.l-btn small { font-size: 13px; font-weight: 500; opacity: 0.8; margin-top: 3px; }
.l-btn-main { background: var(--probe); color: #241400; border: 0; box-shadow: 0 4px 0 #b06f14; }
.l-btn-main:hover { background: #f6b354; }
.l-btn-main:active { transform: translateY(2px); box-shadow: 0 2px 0 #b06f14; }
.l-btn-alt { color: #eef2f5; border: 1px solid rgba(238, 242, 245, 0.5); background: rgba(12, 31, 51, 0.4); }
.l-btn-alt:hover { background: rgba(255, 255, 255, 0.08); }
.l-btn-alt.dark { color: var(--ink); border-color: var(--rule); background: transparent; }
.l-btn-alt.dark:hover { background: #fff; }
.l-hint { margin: 22px 0 0; font-size: 14px; color: #8fa6bd; }
.l-hero-scale {
  position: absolute; z-index: 2; right: clamp(16px, 4vw, 48px); bottom: 28px;
  font: 600 14px var(--display); color: #e8eef4;
}
.l-bar { display: block; height: 6px; border: 2px solid #e8eef4; border-top: 0; margin-bottom: 4px; width: var(--bar, 120px); }
.landing :focus-visible { outline: 3px solid var(--probe); outline-offset: 3px; }

/* ---------------------------------------------------------------- sections */
.landing main > section { padding: clamp(64px, 9vw, 120px) clamp(16px, 5vw, 72px); }
.l-section-title { font-size: clamp(32px, 4vw, 52px); line-height: 1.08; margin: 0 0 48px; max-width: 18em; }

/* labs: alternating rows, screenshots framed like microscope slides */
.l-labs { max-width: 1280px; margin: 0 auto; }
.l-lab {
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 64px); align-items: center; margin-bottom: clamp(56px, 7vw, 96px);
}
.l-lab:last-child { margin-bottom: 0; }
.l-flip .l-slide { order: 2; }
.l-slide { margin: 0; background: #f4f6f8; border: 1px solid var(--rule); border-radius: 4px; padding: 10px 10px 0; }
.l-slide img { display: block; width: 100%; height: auto; border-radius: 2px; }
.l-slide figcaption {
  font: 600 13px var(--display); color: var(--muted);
  padding: 9px 2px 10px; display: flex; justify-content: space-between;
}
.l-slide figcaption::after { content: "nanosim.app"; font-weight: 400; }
.l-q { font: 600 15px var(--body); color: #8a4b00; margin: 0 0 6px; }
.l-lab h3 { font-size: clamp(28px, 2.6vw, 36px); margin: 0 0 14px; line-height: 1.1; }
.l-lab-copy > p { margin: 0 0 18px; max-width: 32em; }
.l-lab ul { margin: 0; padding: 0; list-style: none; }
.l-lab li { padding: 9px 0 9px 26px; border-top: 1px solid #c4ccd4; position: relative; font-size: 16px; }
.l-lab li::before {
  content: ""; position: absolute; left: 2px; top: 16px; width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff4b8, #f2c230 45%, #9a6a0c);
}

/* physics: a ledger on the dark field */
.l-physics { background: var(--field); color: #eef2f5; }
.l-physics-head { max-width: 1280px; margin: 0 auto 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; }
.l-physics-head .l-section-title { margin: 0; }
.l-physics-head p { margin: 0; color: #c9d8e6; max-width: 34em; }
.l-ledger { width: 100%; max-width: 1280px; margin: 0 auto; border-collapse: collapse; font-size: 16px; }
.l-ledger th { text-align: left; font: 600 14px var(--display); color: #8fa6bd; padding: 0 16px 12px 0; border-bottom: 1px solid #2c4a69; }
.l-ledger td { padding: 16px 16px 16px 0; border-bottom: 1px solid #1f3a57; vertical-align: top; }
.l-ledger td:first-child { font-weight: 600; color: #fff; width: 32%; }
.l-ledger td:last-child { color: #f0a23a; font-size: 14px; white-space: nowrap; }

/* classrooms */
.l-class { max-width: 1280px; margin: 0 auto; }
.l-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 0 64px; margin: 0; }
.l-facts div { padding: 22px 0; border-top: 2px solid var(--ink); }
.l-facts dt { font: 700 22px/1.2 var(--display); margin-bottom: 8px; }
.l-facts dd { margin: 0; color: #3d4955; max-width: 30em; }

/* final call */
.l-final {
  background: #f4f6f8; display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: center;
  border-top: 1px solid var(--rule);
}
.l-final > div:last-child { max-width: 640px; }
.l-final h2 { font-size: clamp(32px, 4vw, 52px); margin: 0 0 12px; line-height: 1.05; }
.l-final p { margin: 0 0 24px; color: #3d4955; }
.l-final-pip svg { width: 100%; height: auto; display: block; }
.l-final-pip .pip-wave { transform-origin: 108px 82px; animation: wave 2.4s ease-in-out infinite; }

.l-foot {
  background: var(--field); color: #a9bccd; font-size: 14px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  padding: 28px clamp(16px, 5vw, 72px);
}
.l-foot p { margin: 0; }
.l-foot a { margin-left: 18px; }
.l-foot strong { color: #eef2f5; }

/* ---------------------------------------------------------------- small screens */
@media (max-width: 860px) {
  .l-hero { align-items: flex-end; min-height: 92svh; padding-top: 140px; }
  .l-hero::before { background: linear-gradient(0deg, rgba(12, 31, 51, 0.95) 0%, rgba(12, 31, 51, 0.82) 55%, rgba(12, 31, 51, 0.25) 100%); }
  .l-hero-scale { display: none; }
  .l-nav .l-nav-cta { display: none; }
  .l-lab, .l-physics-head, .l-facts, .l-final { grid-template-columns: 1fr; }
  .l-flip .l-slide { order: 0; }
  .l-final { gap: 16px; }
  .l-final-pip { width: 140px; }
  .l-ledger thead { display: none; }
  .l-ledger, .l-ledger tbody, .l-ledger tr, .l-ledger td { display: block; width: 100%; }
  .l-ledger tr { padding: 14px 0; border-bottom: 1px solid #1f3a57; }
  .l-ledger td { border: 0; padding: 2px 0; }
  .l-ledger td:first-child { width: auto; }
  .l-ledger td:last-child { white-space: normal; }
  .l-foot a { margin: 0 18px 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  .l-final-pip .pip-wave { animation: none; }
}

/* logo in the hero, edges faded into the particle field */
.l-hero-logo {
  position: absolute; z-index: 2; right: clamp(0px, 3vw, 56px); top: 50%; transform: translateY(-46%);
  width: min(46vw, 720px); height: auto; pointer-events: none;
  mix-blend-mode: lighten;   /* the logo's near-black backdrop melts into the field */
  -webkit-mask-image: radial-gradient(ellipse 58% 60% at 50% 50%, #000 74%, transparent 100%);
          mask-image: radial-gradient(ellipse 58% 60% at 50% 50%, #000 74%, transparent 100%);
}
.l-brand img { border-radius: 50%; }
.l-final-pip img { width: 100%; height: auto; display: block; border-radius: 50%; box-shadow: 0 10px 30px rgba(240, 162, 58, 0.35); }
@media (max-width: 860px) {
  .l-hero-logo { position: relative; top: auto; right: auto; transform: none; width: min(92vw, 460px); margin: 0 auto 8px; display: block; order: -1; }
  .l-hero { flex-direction: column; justify-content: flex-end; }
}