:root {
  --hero-bg: #171b22;
  --list-bg: #0d1014;
  --text: #ffffff;
  --muted: #c9ced6;
  --card: #1c2129;
  --radius: 12px;
  --gutter: 20px;
  --max: 1400px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--list-bg);
  color: var(--text);
  font-family: "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; cursor: pointer; }

/* Hero */
.hero {
  position: relative;
  min-height: 375px;
  background: var(--hero-bg);
  display: flex;
  align-items: flex-end;
  padding: 0 var(--gutter) 24px;
}
.hero-inner { width: 100%; max-width: var(--max); margin: 0 auto; }
.hero h1 {
  margin: 0 0 14px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.tagline { margin: 0 0 16px; font-size: 13px; color: var(--muted); }
.start-btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; color: #111;
  border: 0; border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px; font-weight: 600;
  transition: background .15s;
}
.start-btn:hover { background: #e6e8eb; }
.icon-btn {
  position: absolute; top: 14px; right: 18px;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border: 0; border-radius: 8px;
  background: rgba(255,255,255,.08); color: var(--text);
  transition: background .15s;
}
.icon-btn:hover { background: rgba(255,255,255,.16); }

/* List */
.list { padding: 36px var(--gutter) 64px; max-width: calc(var(--max) + 2 * var(--gutter)); margin: 0 auto; }
.list-head { display: flex; justify-content: flex-end; margin-bottom: 14px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; user-select: none; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.switch {
  width: 22px; height: 13px; border-radius: 99px;
  border: 2px solid #fff; position: relative; transition: background .15s;
}
.switch::after {
  content: ""; position: absolute; top: 1px; left: 1px;
  width: 7px; height: 7px; border-radius: 50%; background: #fff;
  transition: transform .15s, background .15s;
}
.toggle input:checked + .switch { background: #fff; }
.toggle input:checked + .switch::after { background: var(--list-bg); transform: translateX(9px); }
.toggle input:focus-visible + .switch { outline: 2px solid #6aa9ff; outline-offset: 2px; }

.video { margin-bottom: 28px; scroll-margin-top: 16px; }
.frame {
  position: relative; aspect-ratio: 16 / 9;
  border-radius: var(--radius); overflow: hidden;
  background: var(--card);
}
.frame iframe, .frame video, .frame > div {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
}
.frame video { object-fit: contain; background: #000; }
.video h2 { margin: 10px 0 0; font-size: 13px; font-weight: 600; letter-spacing: .01em; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  background: #fff; color: #111; padding: 8px 14px; border-radius: 8px;
  font-size: 13px; font-weight: 500; opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (min-width: 768px) {
  :root { --gutter: 20px; }
  .hero { min-height: 375px; }
  .hero h1 { font-size: 34px; }
}
@media (max-width: 600px) {
  :root { --gutter: 16px; --radius: 8px; }
  .hero { min-height: 300px; }
  .hero h1 { font-size: 28px; }
}