/* drdavidmurray.com hub: the shared Murray brand (tokens.css, from @murray/brand) on black, as the Books site's
   original carousel (Books commit 7d6fad3). See docs/BRAND.md. Film and lesson pages never load this file.
   tokens.css is light-only, so the dark text, border and surface values are this site's own bridge below. */
:root {
  --product-page: #000000;
  --product-surface: #0f0f11;
  --product-surface-soft: #1a1a1c;
  --product-highlight: #26262a;
  --hub-text: #ffffff;
  --hub-muted: #8b8b90;
  --hub-subtle: #6a6a6f;
  --hub-border: #26262a;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--product-page);
  color: var(--hub-text);
  font: var(--weight-regular) var(--text-base)/1.6 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: var(--brand-orange); text-decoration: none; }
a:focus-visible, button:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-sm); }
.icon { flex: none; }

.wrap { max-width: var(--content-wide); margin: 0 auto; padding: 0 var(--gutter-mobile); }
@media (min-width: 768px) { .wrap { padding: 0 var(--gutter-tablet); } }
@media (min-width: 1200px) { .wrap { padding: 0 var(--gutter-desktop); } }

/* header: small name + logo, top-left (as the Books carousel); the three sections, quiet, top-right */
.site-header { position: relative; z-index: 2000; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding: 26px clamp(20px, 4vw, 52px); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: var(--weight-medium); font-size: 18px; letter-spacing: -.01em; color: var(--hub-text); opacity: .92; transition: opacity .2s var(--ease); }
.brand:hover { opacity: 1; }
.brand-mark { width: 28px; height: 28px; border: 1.5px solid var(--hub-text); border-radius: 7px; display: grid; place-items: center; flex: 0 0 auto; }
.brand-mark::before { content: ""; width: 3px; height: 14px; background: var(--brand-orange); border-radius: 2px; box-shadow: 6px 0 0 -1px rgba(255, 255, 255, .55); }
.site-header nav { display: flex; gap: var(--space-1); }
.site-header nav a { color: var(--hub-muted); font-weight: var(--weight-medium); font-size: var(--text-sm); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); transition: color .2s var(--ease); }
.site-header nav a:hover { color: var(--hub-text); }
@media (max-width: 520px) { .site-header nav { display: none; } }

/* home: three carousels, one under another */
.hero-tagline { margin: clamp(8px, 3vh, 36px) auto 0; padding: 0 20px; max-width: 40em; text-align: center; font-size: clamp(14px, 1.7vw, 18px); line-height: 1.5; letter-spacing: .22em; text-transform: uppercase; color: var(--brand-orange); font-weight: var(--weight-semibold); }
.carousel { position: relative; overflow: hidden; isolation: isolate; padding: clamp(28px, 5vh, 56px) 0 clamp(20px, 4vh, 44px); background: radial-gradient(70% 58% at 50% 50%, #0f0f11, #000); }
.carousel::after { content: ""; position: absolute; inset: 0; z-index: 1200; pointer-events: none; background: linear-gradient(90deg, #000, transparent 6%, transparent 94%, #000); }
.row-head { position: relative; z-index: 1300; display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); padding: 0 clamp(20px, 4vw, 52px); }
.row-label { margin: 0; font-size: clamp(14px, 1.7vw, 18px); letter-spacing: .22em; text-transform: uppercase; color: var(--brand-orange); font-weight: var(--weight-semibold); }
.row-all { display: inline-flex; align-items: center; gap: 6px; color: var(--hub-muted); font-size: var(--text-sm); font-weight: var(--weight-medium); transition: color .2s var(--ease); }
.row-all:hover { color: var(--hub-text); }

.stage { position: relative; }
.shelf { position: absolute; bottom: 0; left: 0; display: flex; align-items: flex-end; will-change: transform; }
.book {
  --push: 0px; --sc: 1;
  position: relative; flex: 0 0 auto; height: var(--bh); z-index: var(--z); cursor: pointer;
  transform: translateX(var(--push)) scale(var(--sc));
  transition: transform .5s var(--ease), filter .35s var(--ease);
  filter: drop-shadow(0 16px 24px rgba(0, 0, 0, .5));
}
.book img { height: 100%; width: auto; display: block; pointer-events: none; }
.book.is-active {
  transform: translateY(-22px) scale(1.16); z-index: 900;
  filter: drop-shadow(0 42px 56px rgba(0, 0, 0, .7)) brightness(1.03);
}
.book:focus-visible { box-shadow: none; }

/* left / right carousel arrows */
.nav-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 1300;
  width: clamp(42px, 4vw, 54px); height: clamp(42px, 4vw, 54px); border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(20, 20, 22, .5); border: 1px solid rgba(255, 255, 255, .18); color: #fff;
  font: inherit; font-size: 26px; line-height: 1; padding: 0 0 3px; cursor: pointer;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 3px 16px rgba(0, 0, 0, .55);
  opacity: .6; transition: opacity .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease); }
.nav-arrow:hover { opacity: 1; background: rgb(var(--brand-orange-rgb) / .9); border-color: transparent; }
.nav-arrow:focus-visible { opacity: 1; border-radius: 50%; }
.nav-arrow.left { left: clamp(10px, 3vw, 34px); }
.nav-arrow.right { right: clamp(10px, 3vw, 34px); }

/* filter pills */
.filters { position: relative; z-index: 2100; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; padding: clamp(14px, 2.5vh, 26px) 16px 0; }
.pill { font: inherit; font-size: 14px; font-weight: var(--weight-medium); color: var(--hub-muted); padding: 11px 22px; border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, .14); background: rgba(26, 26, 28, .5);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  cursor: pointer; transition: all .25s var(--ease); white-space: nowrap; }
.pill:hover { color: var(--hub-text); border-color: var(--hub-muted); }
.pill.active { color: #fff; background: var(--brand-orange); border-color: var(--brand-orange); }
.pill:focus-visible { border-radius: var(--radius-pill); }

@media (prefers-reduced-motion: reduce) { .book { transition: filter .35s var(--ease); } }

/* section pages: /videos/, /school/, 404 */
.back { display: inline-flex; align-items: center; gap: var(--space-2); margin-top: var(--space-2); font-weight: var(--weight-semibold); font-size: var(--text-sm); }

.head { padding: var(--space-8) 0 var(--space-8); max-width: var(--content-narrow); }
.head h1 { margin: 0; font-size: var(--text-3xl); line-height: 1.1; font-weight: var(--weight-bold); letter-spacing: -0.015em; color: var(--hub-text); }
.head p { margin: var(--space-3) 0 0; font-size: var(--text-lg); color: var(--hub-muted); max-width: var(--measure); }

.grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr; padding-bottom: var(--space-16); }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid { grid-template-columns: repeat(3, 1fr); } }
.card { display: flex; flex-direction: column; background: var(--product-surface); border: 1px solid var(--hub-border); border-radius: var(--radius-card); overflow: hidden; color: inherit; transition: border-color .25s var(--ease), transform .5s var(--ease); }
a.card:hover { border-color: rgb(var(--brand-orange-rgb) / .6); transform: translateY(-4px); }
.card-art { position: relative; aspect-ratio: 4 / 3; background: var(--product-surface-soft); overflow: hidden; }
.card-art.wide { aspect-ratio: 16 / 9; }
.card-art img { width: 100%; height: 100%; object-fit: cover; }
.card-art.blank { display: flex; align-items: center; justify-content: center; }
.play { position: absolute; left: var(--space-3); bottom: var(--space-3); display: inline-flex; align-items: center; gap: var(--space-2); background: var(--brand-orange); color: #fff; font-weight: var(--weight-semibold); font-size: var(--text-sm); padding: 6px 12px; border-radius: var(--radius-pill); }
.badge { background: var(--product-highlight); color: var(--hub-text); font-weight: var(--weight-semibold); font-size: var(--text-sm); padding: 6px 14px; border-radius: var(--radius-pill); border: 1px solid rgba(255, 255, 255, .14); }
.card-text { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-1); }
.kicker { font-size: var(--text-xs); font-weight: var(--weight-semibold); letter-spacing: 0.1em; color: var(--brand-orange); }
.card-text h2 { margin: 0; font-size: var(--text-xl); line-height: 1.2; font-weight: var(--weight-bold); color: var(--hub-text); }
.card-text p { margin: var(--space-1) 0 0; color: var(--hub-muted); font-size: var(--text-sm); }
.card-text .meta { color: var(--hub-subtle); }

.foot { border-top: 1px solid var(--hub-border); padding-top: var(--space-6); padding-bottom: var(--space-10); color: var(--hub-subtle); font-size: var(--text-sm); }
.home .foot { margin-top: var(--space-6); }