:root {
  color-scheme: dark;
  --bg: #0c1117;
  --surface: #151c24;
  --surface-2: #1c252e;
  --line: #2b353d;
  --text: #f1f4f2;
  --muted: #a5b1b4;
  --mint: #b8f28c;
  --mint-deep: #88c65a;
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--mint); outline-offset: 5px; border-radius: 3px; }
img { display: block; max-width: 100%; }
::selection { background: var(--mint); color: var(--bg); }

.site-shell { overflow: hidden; }
.site-header, .hero, .videos-section, .closing, .site-footer { width: min(100% - 80px, 1240px); margin-inline: auto; }
.site-header { height: 92px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 14px; font-size: 15px; font-weight: 760; letter-spacing: .025em; white-space: nowrap; }
.brand-mark { width: 37px; height: 37px; border: 1px solid var(--mint); display: grid; place-items: center; color: var(--mint); font-size: 20px; font-weight: 800; line-height: 1; }
.brand-mark span, .art-core span { color: var(--text); }
.site-header nav { display: flex; align-items: center; gap: 34px; color: #ccd5d5; font-size: 14px; }
.site-header nav a:hover, .site-footer a:hover { color: var(--mint); }
.nav-channel { border: 1px solid var(--line); border-radius: 4px; padding: 10px 14px; }
.nav-channel:hover { border-color: var(--mint); }

.hero { min-height: 590px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(390px, .95fr); align-items: center; gap: 40px; padding-block: 72px 84px; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { color: var(--mint); font-size: 12px; font-weight: 760; letter-spacing: .17em; text-transform: uppercase; }
.pulse-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px #b8f28c20; vertical-align: 1px; }
.hero h1 { margin: 30px 0 24px; font-size: clamp(45px, 5.2vw, 77px); line-height: 1.14; letter-spacing: -.055em; font-weight: 820; }
.hero h1 em { color: var(--mint); font-style: normal; }
.hero-description { max-width: 580px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 27px; align-items: center; margin-top: 37px; }
.primary-button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 20px; background: var(--mint); color: #152011; padding: 0 24px; border-radius: 3px; font-size: 14px; font-weight: 760; transition: background .2s, transform .2s; }
.primary-button:hover { background: #d1ffad; transform: translateY(-2px); }
.text-button { color: #d6dddd; font-size: 14px; font-weight: 650; }
.text-button:hover { color: var(--mint); }
.text-button span { margin-left: 10px; }

.hero-art { height: 490px; display: grid; place-items: center; position: relative; isolation: isolate; }
.hero-art::before { content: ""; position: absolute; width: 360px; height: 360px; border-radius: 50%; background: #a5ec751a; filter: blur(75px); z-index: -1; }
.orbit { position: absolute; border: 1px solid #b8f28c48; border-radius: 50%; }
.orbit-outer { width: 440px; height: 440px; }
.orbit-inner { width: 305px; height: 305px; border-color: #b8f28c80; }
.orbit-outer::before, .orbit-inner::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 18px var(--mint); }
.orbit-outer::before { top: 55px; right: 62px; }
.orbit-inner::after { bottom: 28px; left: 45px; }
.art-core { width: 217px; height: 217px; border: 1px solid #b8f28c99; border-radius: 28px; background: linear-gradient(140deg, #233228, #11191d 65%); display: grid; place-items: center; color: var(--mint); font-size: 126px; font-weight: 800; letter-spacing: -.12em; box-shadow: 0 30px 90px #0009, inset 0 1px #ffffff1a; transform: rotate(-9deg); }
.art-core span { font-size: 90px; margin-left: -45px; margin-top: 50px; }
.art-label { position: absolute; color: #869695; font-size: 10px; font-weight: 760; letter-spacing: .19em; }
.art-label-top { top: 32px; right: 12px; }
.art-label-bottom { bottom: 18px; left: 8px; }

.videos-section { padding-block: 88px 112px; border-top: 1px solid var(--line); scroll-margin-top: 20px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 35px; margin-bottom: 34px; }
.section-heading .eyebrow { margin-bottom: 15px; }
.section-heading h2 { font-size: clamp(34px, 4vw, 50px); line-height: 1.1; letter-spacing: -.05em; margin: 0; }
.heading-accent { color: var(--mint); }
.section-heading > p { max-width: 300px; margin: 0 0 4px; color: var(--muted); line-height: 1.7; font-size: 14px; }
.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.video-card { min-width: 0; background: var(--surface); border: 1px solid var(--line); overflow: hidden; transition: border-color .2s, transform .2s; }
.video-card:hover { border-color: #a9df82a8; transform: translateY(-3px); }
.video-card-featured { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); }
.video-cover { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; background: linear-gradient(135deg, #26392d, #182028); }
.video-card-featured .video-cover { height: 100%; min-height: 330px; aspect-ratio: auto; }
.video-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.video-cover:hover img { transform: scale(1.035); }
.video-cover img.cover-unavailable { display: none; }
.cover-play { position: absolute; width: 52px; height: 52px; display: grid; place-items: center; left: 22px; bottom: 22px; border-radius: 50%; background: var(--mint); color: #162113; font-size: 17px; padding-left: 3px; box-shadow: 0 10px 25px #0005; }
.video-content { padding: 25px 28px 27px; display: flex; flex-direction: column; align-items: flex-start; }
.video-card-featured .video-content { justify-content: center; padding: 40px; }
.video-number { color: var(--mint); font-size: 11px; letter-spacing: .15em; font-weight: 760; }
.video-content h3 { font-size: clamp(18px, 2vw, 24px); line-height: 1.5; margin: 15px 0 16px; letter-spacing: -.02em; }
.video-card-featured h3 { font-size: clamp(24px, 2.65vw, 36px); line-height: 1.42; }
.video-content h3 a:hover { color: var(--mint); }
.video-description { color: var(--muted); font-size: 14px; line-height: 1.8; margin: 0 0 22px; }
.watch-link { color: var(--mint); font-size: 13px; font-weight: 750; margin-top: auto; padding-top: 8px; border-bottom: 1px solid transparent; }
.watch-link:hover { border-color: var(--mint); }
.watch-link span { margin-left: 7px; }

.closing { border-top: 1px solid var(--line); padding-block: 100px 110px; text-align: center; }
.closing h2 { margin: 18px 0 28px; font-size: clamp(36px, 5vw, 67px); line-height: 1.26; letter-spacing: -.055em; }
.closing h2 span { color: var(--mint); }
.site-footer { min-height: 95px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 13px; color: var(--muted); }
.site-footer span:first-child { color: var(--text); font-weight: 750; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 0; padding-bottom: 65px; }
  .hero-art { height: 360px; }
  .orbit-outer { width: 320px; height: 320px; }
  .orbit-inner { width: 240px; height: 240px; }
  .art-core { width: 160px; height: 160px; font-size: 95px; border-radius: 22px; }
  .art-core span { font-size: 65px; margin-left: -30px; margin-top: 37px; }
}

@media (max-width: 700px) {
  .site-header, .hero, .videos-section, .closing, .site-footer { width: min(100% - 36px, 1240px); }
  .site-header { height: 72px; }
  .brand { font-size: 13px; gap: 9px; }
  .brand-mark { width: 30px; height: 30px; font-size: 17px; }
  .site-header nav { gap: 10px; font-size: 12px; }
  .site-header nav > a:first-child { display: none; }
  .nav-channel { padding: 8px 9px; }
  .hero { padding-top: 58px; }
  .hero h1 { font-size: clamp(41px, 9vw, 60px); }
  .hero-description { font-size: 15px; }
  .hero-art { height: 320px; margin-top: 15px; }
  .art-label { display: none; }
  .videos-section { padding-block: 70px 85px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 16px; }
  .video-grid { grid-template-columns: 1fr; gap: 18px; }
  .video-card-featured { grid-column: auto; display: block; }
  .video-card-featured .video-cover { height: auto; min-height: 0; aspect-ratio: 16 / 9; }
  .video-card-featured .video-content, .video-content { padding: 22px; }
  .video-card-featured h3, .video-content h3 { font-size: 20px; }
  .closing { padding-block: 80px; }
  .site-footer { padding-block: 25px; flex-wrap: wrap; }
  .site-footer > span:nth-child(2) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}