.hero { position: relative; isolation: isolate; min-height: min(780px, 84svh); display: grid; align-items: end; overflow: clip; color: var(--color-white); background: var(--color-deep); }
.hero-media, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media { z-index: -3; object-fit: cover; object-position: center 58%; }
.hero-overlay { z-index: -2; background: linear-gradient(90deg, rgba(12, 20, 25, .32) 0%, rgba(12, 20, 25, .18) 46%, rgba(12, 20, 25, .08) 100%), linear-gradient(0deg, rgba(26, 41, 51, .36) 0%, rgba(26, 41, 51, .06) 45%, rgba(26, 41, 51, .08) 100%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr); align-items: end; gap: clamp(28px, 6vw, 72px); padding-top: clamp(82px, 8vw, 128px); padding-bottom: clamp(40px, 5vw, 68px); }
.hero-copy { max-width: 640px; }
.hero-lead { max-width: 560px; margin: 0; color: rgba(255, 255, 255, .84); font-size: clamp(1.12rem, 2.5vw, 1.55rem); line-height: 1.35; font-weight: 650; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.library { background: linear-gradient(180deg, var(--color-bone), var(--color-paper)); }
.local-warning { display: grid; gap: 5px; margin-bottom: 30px; padding: 18px 20px; border: 1px solid rgba(36, 38, 38, .18); border-left: 6px solid var(--color-lime); border-radius: var(--radius); color: var(--color-bone); background: var(--color-deep); }
.local-warning[hidden] { display: none; }
.local-warning strong { color: var(--color-lime); }
.local-warning span { color: rgba(244, 240, 223, .8); }
.local-warning code { overflow-wrap: anywhere; }
.library-intro { display: flex; justify-content: center; text-align: center; }
.library-intro h2 { max-width: 760px; margin: 0 auto; font-size: clamp(2.5rem, 5.6vw, 5.6rem); line-height: .92; letter-spacing: -.05em; }
.filter-bar { position: sticky; z-index: 8; top: calc(var(--header-height) + 12px); display: flex; gap: 8px; margin-block: clamp(36px, 6vw, 64px); padding: 8px; overflow-x: auto; border: 1px solid var(--color-line); border-radius: 16px; background: rgba(251, 248, 234, .9); box-shadow: 0 12px 34px rgba(26, 41, 51, .08); backdrop-filter: blur(16px); scrollbar-width: none; }
.filter-bar::-webkit-scrollbar { display: none; }
.filter-button { min-height: 46px; display: inline-flex; flex: 1 0 auto; align-items: center; justify-content: center; gap: 8px; padding: 10px 16px; border: 0; border-radius: 10px; color: rgba(36, 38, 38, .72); background: transparent; font-weight: 900; cursor: pointer; }
.filter-button span { min-width: 24px; padding: 2px 6px; border-radius: 999px; background: rgba(36, 38, 38, .08); font-size: .72rem; }
.filter-button.is-active { color: var(--color-bone); background: var(--color-deep); }
.filter-button.is-active span { color: var(--color-deep); background: var(--color-lime); }
.training-sections { display: grid; gap: clamp(64px, 9vw, 110px); }
.training-group[hidden] { display: none; }
.group-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 26px; padding-bottom: 18px; border-bottom: 1px solid var(--color-line); }
.group-head h3 { margin: 0; font-size: clamp(2rem, 4vw, 4rem); line-height: 1; letter-spacing: -.045em; }
.group-count { color: var(--color-muted); font-size: .78rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 28px); }
.video-card { min-width: 0; overflow: hidden; border-radius: var(--radius); background: var(--color-deep); box-shadow: 0 18px 42px rgba(26, 41, 51, .14); }
.video-embed { width: 100%; display: block; aspect-ratio: 1 / 1; border: 0; background: var(--color-deep); }
.video-info { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 12px 14px 12px 18px; color: var(--color-bone); background: var(--color-deep); border-bottom: 1px solid rgba(242, 230, 109, .24); }
.video-info-label { color: var(--color-lime); font-size: .72rem; font-weight: 950; letter-spacing: .14em; text-transform: uppercase; }
.video-info strong { width: 44px; height: 44px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; color: var(--color-deep); background: var(--color-lime); font-size: 1rem; line-height: 1; letter-spacing: .02em; }

.cta { position: relative; overflow: clip; color: var(--color-white); background: var(--color-deep); }
.cta-inner { display: grid; grid-template-columns: 1fr; gap: 0; align-items: center; justify-items: center; text-align: center; }
.cta h2 { max-width: 900px; margin: 0 auto; }

.login-modal { width: min(calc(100% - 28px), 470px); max-height: calc(100dvh - 28px); padding: 0; overflow: auto; border: 0; border-radius: 18px; color: var(--color-ink); background: var(--color-paper); box-shadow: 0 34px 100px rgba(0, 0, 0, .42); }
.login-modal::backdrop { background: rgba(10, 17, 22, .76); backdrop-filter: blur(8px); }
.login-card { position: relative; padding: clamp(26px, 5vw, 42px); }
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 38px; color: var(--color-deep); font-size: .78rem; font-weight: 950; text-transform: uppercase; }
.login-brand img { width: 44px; height: 48px; object-fit: contain; }
.login-card h2 { margin: 0; color: var(--color-deep); font-size: clamp(2.4rem, 8vw, 4rem); line-height: .94; letter-spacing: -.05em; }
.login-form { display: grid; gap: 10px; margin-top: 28px; }
.login-form label { margin-top: 8px; font-size: .82rem; font-weight: 900; }
.login-form input { width: 100%; min-height: 52px; padding: 0 15px; border: 1px solid var(--color-line); border-radius: 10px; color: var(--color-ink); background: rgba(255, 255, 255, .75); outline: none; }
.login-form input:focus { border-color: var(--color-deep); box-shadow: 0 0 0 2px rgba(26, 41, 51, .18); }
.password-field { position: relative; }
.password-field input { padding-right: 62px; }
.password-field button { position: absolute; top: 4px; right: 4px; min-width: 50px; min-height: 44px; border: 0; color: var(--color-deep); background: transparent; font-size: .78rem; font-weight: 900; cursor: pointer; }
.login-submit { min-height: 52px; display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 14px; padding: 12px 18px; border: 0; border-radius: 999px; color: var(--color-bone); background: var(--color-deep); font-weight: 900; cursor: pointer; }
.login-error { margin: 4px 0 0; color: #a32828; font-size: .86rem; font-weight: 750; }

@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  .hero { min-height: clamp(440px, 118vw, 620px); }
  .hero-grid { padding-top: clamp(140px, 46vw, 240px); padding-bottom: 44px; }
  .hero-media { object-fit: contain; object-position: center 40%; transform: scale(1.8); }
  .hero-overlay { background: linear-gradient(180deg, rgba(12, 20, 25, .22) 0%, rgba(12, 20, 25, .32) 55%, rgba(26, 41, 51, .42) 100%); }
  .filter-bar { margin-inline: -8px; }
  .video-grid { grid-template-columns: 1fr; }
  .group-head { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
  .hero-grid { padding-top: clamp(128px, 40vw, 200px); }
  .hero-copy { transform: translateY(18px); }
  .hero-media { object-fit: contain; object-position: center 44%; transform: scale(1.24); }
}

@media (min-width: 1500px) {
  :root { --container: 1320px; }
  .video-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}