:root { --ink: #17110c; --amber: #d4974f; --cream: #f2e8d7; --white: #fff; --rail: 410px; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: #fff; background: var(--ink); font-family: "Inter", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }

.site-header {
  position: fixed; z-index: 30; inset: 0 0 auto; height: 82px;
  padding: 0 clamp(22px, 4vw, 70px); display: grid;
  grid-template-columns: 1fr auto 1fr; align-items: center;
  border-bottom: 1px solid rgba(255,255,255,.14);
  background: linear-gradient(90deg, rgba(10,7,4,.72), rgba(10,7,4,.2) 70%, rgba(10,7,4,.88));
  backdrop-filter: blur(5px);
}
.logo { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; font: 700 13px/1 "Montserrat", sans-serif; letter-spacing: .08em; }
.main-nav { display: flex; gap: clamp(20px, 2.5vw, 42px); }
.main-nav a { position: relative; padding: 32px 0 30px; color: rgba(255,255,255,.68); font-size: 10px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.main-nav a:hover, .main-nav .is-active { color: #fff; }
.main-nav .is-active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--amber); }
.header-button { justify-self: end; display: inline-grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 1px solid rgba(255,255,255,.55); border-radius: 50% !important; overflow: hidden; transition: .25s; }
.header-button:hover { color: var(--ink); background: #fff; }
.header-button svg { display: block; width: 16px; height: 16px; }

.acoustic-page { height: 100svh; overflow: hidden; }
.hero {
  position: fixed; inset: 0 var(--rail) 0 0; display: flex; align-items: center;
  padding: 112px 55px 70px clamp(30px, 7vw, 118px);
  isolation: isolate; background: #1b120b url("bg_acustico_horizontal.png") center / cover no-repeat;
}
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(8,5,3,.91), rgba(8,5,3,.53) 35%, rgba(8,5,3,.05) 68%, rgba(8,5,3,.46)), linear-gradient(180deg, rgba(5,3,2,.43), transparent 28%, transparent 74%, rgba(5,3,2,.55)); }
.hero__content { width: min(570px, 44vw); text-shadow: 0 3px 26px rgba(0,0,0,.75); }
.kicker { display: flex; align-items: center; gap: 13px; margin: 0 0 17px; color: var(--amber); font-size: 9px; font-weight: 600; letter-spacing: .3em; text-transform: uppercase; }
.kicker span { width: 38px; height: 1px; background: currentColor; }
.hero h1 { margin: 0; font: 500 clamp(43px, 5.2vw, 82px)/.98 "Montserrat", sans-serif; letter-spacing: -.055em; text-transform: uppercase; }
.hero h1 strong { color: var(--cream); font-weight: 800; }
.hero__intro { max-width: 510px; margin: 24px 0 17px; color: rgba(255,255,255,.73); font-size: clamp(14px, 1.1vw, 17px); line-height: 1.7; }
.hero__tags { display: flex; align-items: center; gap: 10px; margin: 0 0 28px; color: rgba(255,255,255,.72); font-size: 9px; letter-spacing: .14em; text-transform: uppercase; }
.hero__tags i { width: 3px; height: 3px; border-radius: 50%; background: var(--amber); }
.button { display: inline-flex; align-items: center; gap: 26px; padding: 15px 19px; color: var(--ink); background: var(--cream); font-size: 9px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; transition: .25s; }
.button:hover { background: var(--amber); transform: translateY(-2px); }

.video-rail {
  position: fixed; z-index: 10; top: 82px; right: 0; bottom: 0; width: var(--rail);
  padding: 28px 26px 0; overflow-y: auto; overscroll-behavior: contain;
  background: rgba(14,10,7,.9); border-left: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(13px); scrollbar-color: var(--amber) rgba(255,255,255,.08); scrollbar-width: thin;
}
.video-rail::-webkit-scrollbar { width: 6px; }
.video-rail::-webkit-scrollbar-track { background: rgba(255,255,255,.07); }
.video-rail::-webkit-scrollbar-thumb { background: var(--amber); border-radius: 6px; }
.video-rail__header { padding: 0 2px 24px; }
.video-rail__header p { margin: 0 0 7px; color: var(--amber); font-size: 8px; font-weight: 600; letter-spacing: .25em; text-transform: uppercase; }
.video-rail__header h2 { margin: 0 0 8px; font: 600 25px/1.2 "Montserrat", sans-serif; }
.video-rail__header > span { color: rgba(255,255,255,.42); font-size: 8px; letter-spacing: .1em; text-transform: uppercase; }
.video-list { display: grid; gap: 25px; }
.video-card { padding-bottom: 23px; border-bottom: 1px solid rgba(255,255,255,.13); }
.video-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #080604; box-shadow: 0 12px 30px rgba(0,0,0,.3); }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-card__caption { display: grid; grid-template-columns: 28px 1fr; align-items: center; margin-top: 13px; }
.video-card__caption span { color: var(--amber); font-size: 8px; }
.video-card__caption h3 { margin: 0; font: 500 13px/1.35 "Montserrat", sans-serif; }
.video-rail__footer { margin: 28px -26px 0; padding: 28px; background: rgba(212,151,79,.11); }
.video-rail__footer p { margin: 0 0 12px; color: rgba(255,255,255,.61); font-size: 11px; }
.video-rail__footer a { font-size: 9px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.video-rail__footer a span { margin-left: 13px; color: var(--amber); }

@media (max-width: 980px) {
  :root { --rail: 350px; }
  .site-header { grid-template-columns: 1fr auto 1fr; }
  .main-nav { justify-content: center; }
  .main-nav a,
  .main-nav a:nth-child(1),
  .main-nav a:nth-child(2),
  .main-nav a:nth-child(3),
  .main-nav a:nth-child(4) {
    display: inline-block !important;
  }
  .hero { padding-right: 30px; background-position: center; }
}

@media (max-width: 720px) {
  body { color: #fff; background: var(--ink); }
  .site-header {
    position: absolute;
    height: 70px;
    padding: 0 18px;
    grid-template-columns: 1fr auto 1fr;
  }
  .main-nav { gap: 16px; justify-content: center; }
  .main-nav a,
  .main-nav a:nth-child(1),
  .main-nav a:nth-child(2),
  .main-nav a:nth-child(3),
  .main-nav a:nth-child(4),
  .main-nav a:first-child {
    display: inline-block !important;
    padding: 27px 0 25px;
    font-size: 8px;
    letter-spacing: .1em;
  }
  .header-button { width: 42px; height: 42px; }
  .acoustic-page { height: auto; overflow: visible; }
  .hero { position: relative; inset: auto; min-height: 72svh; align-items: flex-end; padding: 100px 23px 55px; color: #fff; background-position: 62% 18%; }
  .hero::before { background: linear-gradient(0deg, rgba(8,5,3,.96), rgba(8,5,3,.58) 47%, rgba(8,5,3,.05) 78%), linear-gradient(90deg, rgba(8,5,3,.25), transparent); }
  .hero__content { width: 100%; }
  .hero h1 { font-size: clamp(39px, 12vw, 58px); }
  .hero__intro { max-width: 460px; font-size: 13px; }
  .video-rail {
    position: relative; inset: auto; width: 100%; padding: 48px 20px 0; overflow: visible;
    color: #fff; background: rgba(14,10,7,.9); border: 0; border-top: 1px solid rgba(255,255,255,.14);
    backdrop-filter: blur(13px);
  }
  .video-rail__header { padding-bottom: 28px; }
  .video-rail__header h2 { font-size: 30px; }
  .video-rail__header > span { display: none; }
  .video-list { gap: 30px; }
  .video-card__caption h3 { font-size: 15px; }
  .video-rail__footer { margin: 38px -20px 0; padding: 38px 22px; }
}

@media (max-width: 400px) {
  .main-nav { gap: 12px; }
  .main-nav a,
  .main-nav a:nth-child(1),
  .main-nav a:nth-child(2),
  .main-nav a:nth-child(3),
  .main-nav a:nth-child(4),
  .main-nav a:first-child {
    display: inline-block !important;
    letter-spacing: .08em;
  }
  .hero { min-height: 680px; }
  .hero__tags { margin-bottom: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}