:root {
  color-scheme: light;
  --ink: #153651;
  --muted: #677784;
  --line: #d7e0e6;
  --blue: #123c61;
  --paper: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
}

button { font: inherit; }
button:focus-visible { outline: 3px solid #2879ad; outline-offset: 4px; }

.site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 26px;
  padding: 16px clamp(20px, 4vw, 68px);
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.brand { display: block; }

.brand-mark { display: block; width: 112px; height: auto; }

.header-copy {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.header-copy p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.header-copy h1 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(28px, 3vw, 43px);
  font-weight: 400;
  letter-spacing: -.5px;
}

.book { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; background: var(--blue); color: #fff; font-size: 13px; font-weight: 700; letter-spacing: 1.15px; text-decoration: none; text-transform: uppercase; }
.book:hover { background: #0b2d49; }

main {
  max-width: 1900px;
  margin: auto;
  padding: 30px clamp(20px, 4vw, 68px) 22px;
}

.intro { display: grid; grid-template-columns: minmax(280px,.8fr) minmax(320px,1.2fr); align-items: end; gap: clamp(28px,6vw,110px); margin: 2px 0 28px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 9px; color: #9a7b3f; font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; }
.intro h2, .play-round h2 { margin: 0; color: var(--ink); font: 400 clamp(30px,4vw,50px)/1.04 Georgia,'Times New Roman',serif; letter-spacing: -.8px; }
.intro > p { max-width: 670px; margin: 0; color: var(--muted); font: 400 clamp(17px,1.5vw,21px)/1.55 Georgia,'Times New Roman',serif; }

.wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(22px,3vw,46px);
}

.tile { min-width: 0; background: #ffffff; overflow: hidden; }
.video { aspect-ratio: 16 / 9; min-height: 240px; background: #102b3e; }
.video iframe { display: block; width: 100%; height: 100%; border: 0; }

.tilebar {
  display: flex;
  align-items: center;
  padding: 13px 0 15px;
  border-bottom: 1px solid var(--line);
}

.tilebar strong {
  color: var(--ink);
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 24px;
  font-weight: 400;
}

.statusline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 20px 0 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.progress { height: 2px; background: #e5ebef; }
#progress { width: 0; height: 100%; background: var(--blue); }

.start {
  margin-top: 18px;
  padding: 13px 22px;
  border: 0;
  background: var(--blue);
  color: #ffffff;
  cursor: pointer;
}

#notice { margin: 18px 0 0; color: var(--ink); font-size: 14px; line-height: 1.5; }

footer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 1.3px;
  text-align: center;
  text-transform: uppercase;
}

.play-round { display: grid; grid-template-columns: minmax(270px,.72fr) minmax(440px,1.28fr); gap: clamp(34px,6vw,100px); align-items: center; margin-top: clamp(65px,8vw,120px); padding: clamp(36px,5vw,72px); background: #f3f5f5; border-top: 4px solid #a58c5c; }
.round-copy > p:not(.eyebrow) { margin: 22px 0 28px; color: var(--muted); line-height: 1.65; }
.round-video { aspect-ratio: 16/9; background: #102b3e; box-shadow: 0 20px 50px rgba(17,41,58,.18); }
.round-video iframe { width: 100%; height: 100%; border: 0; display: block; }
footer { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 18px 30px; }
footer img { width: 74px; height: auto; }
footer p { margin: 0; }
footer a { color: var(--ink); font-weight: 700; text-underline-offset: 4px; }

footer span { padding: 0 10px; color: #a58c5c; }

.video-error {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 24px;
  text-align: center;
  gap: 14px;
  color: #ffffff;
}

.video-error a { color: #ffffff; text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 1050px) {
  .book-header { padding-inline: 18px; }
  .play-round { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .site-header { grid-template-columns: auto 1fr; gap: 18px; padding: 14px 18px; }
  .brand-mark { width: 82px; }
  .header-copy { padding-left: 18px; }
  .header-copy p { font-size: 11px; letter-spacing: 1.4px; }
  .header-copy h1 { font-size: 26px; line-height: 1.05; }
  .book-header { grid-column: 1 / -1; width: 100%; }
  main { padding: 20px 16px; }
  .intro { grid-template-columns: 1fr; gap: 16px; }
  .wall { grid-template-columns: 1fr; gap: 20px; }
  .video { min-height: 200px; }
  .tilebar strong { font-size: 23px; }
  .statusline { flex-direction: column; gap: 3px; margin-top: 16px; }
  .play-round { margin-top: 62px; padding: 30px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto; }
}