.tutorial-page { color: var(--ink); background: var(--paper); }
.tutorial-header { color: #f9f9fb; background: var(--ink); border-bottom: 1px solid rgba(255, 255, 255, 0.13); }
.tutorial-header-inner { display: flex; min-height: 76px; align-items: center; justify-content: space-between; gap: 22px; }
.tutorial-return { display: inline-flex; min-height: 44px; align-items: center; gap: 10px; color: #e0e1e9; font-size: 13px; font-weight: 800; text-decoration: none; transition: color 180ms ease, gap 180ms ease; }
.tutorial-return:hover { gap: 15px; color: var(--mint); }
.tutorial-return:focus-visible { outline: 3px solid var(--mint); outline-offset: 4px; }
.tutorial-return span { font-size: 18px; line-height: 1; }

.tutorial-hero { position: relative; isolation: isolate; overflow: hidden; color: #f9f9fb; background: var(--ink); }
.tutorial-hero::before { position: absolute; top: -188px; right: -128px; z-index: -1; width: min(48vw, 650px); height: min(48vw, 650px); content: ""; border: clamp(58px, 7vw, 110px) solid #ff9d2e; border-left-color: transparent; border-bottom-color: transparent; border-radius: 50%; transform: rotate(12deg); }
.tutorial-hero::after { position: absolute; right: 12%; bottom: 0; width: min(52vw, 750px); height: 1px; content: ""; background: rgba(255, 255, 255, 0.22); }
.tutorial-hero-inner { display: grid; min-height: min(74svh, 770px); grid-template-columns: minmax(0, 1fr) minmax(190px, 0.38fr); align-items: end; gap: 56px; padding: clamp(84px, 12vw, 152px) 0 clamp(70px, 9vw, 118px); }
.tutorial-kicker, .video-lesson-index { margin: 0 0 20px; color: #ffb14d; font: 850 11px/1.35 var(--display); letter-spacing: 0.12em; }
.tutorial-hero h1 { max-width: 8ch; margin: 0; color: #fff; font: 800 clamp(58px, 9vw, 132px)/0.88 var(--display); letter-spacing: -0.055em; }
.tutorial-hero h1 em { color: #ffb14d; font-style: normal; }
.tutorial-lead { max-width: 40ch; margin: 30px 0 0; color: #c8cad7; font-size: clamp(15px, 1.45vw, 18px); line-height: 1.8; }
.tutorial-hero-note { justify-self: end; margin: 0; padding: 18px 0 21px 22px; color: #cacbd7; border-left: 1px solid rgba(255, 255, 255, 0.28); font: 800 10px/1.7 var(--display); letter-spacing: 0.1em; }
.tutorial-hero-note span { display: block; margin-bottom: 5px; color: #ffb14d; font-size: 42px; line-height: 1; letter-spacing: -0.05em; }

.video-lesson { position: relative; overflow: hidden; }
.video-lesson--first { background: #f5f4f0; }
.video-lesson--second { color: #f7f8ff; background: #181925; }
.video-lesson--second::before { position: absolute; right: -84px; bottom: -124px; width: 318px; height: 318px; content: ""; border: 52px solid #635bff; border-top-color: transparent; border-left-color: transparent; border-radius: 50%; transform: rotate(-20deg); }
.video-lesson-inner { display: grid; grid-template-columns: minmax(240px, 0.55fr) minmax(340px, 0.78fr); align-items: center; gap: clamp(42px, 9vw, 168px); padding: clamp(82px, 11vw, 150px) 0; }
.video-lesson-intro { align-self: start; padding-top: 36px; }
.video-lesson--second .video-lesson-intro { color: #f7f8ff; }
.video-lesson--second .video-lesson-index { color: var(--mint); }
.video-lesson h2 { max-width: 7ch; margin: 0; color: var(--ink); font: 800 clamp(43px, 5vw, 72px)/0.98 var(--display); letter-spacing: -0.045em; }
.video-lesson--second h2 { color: #fff; }
.video-lesson-intro > p:not(.video-lesson-index) { max-width: 30ch; margin: 22px 0 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.video-lesson--second .video-lesson-intro > p:not(.video-lesson-index) { color: #c8cad7; }
.video-lesson-back { display: inline-flex; min-height: 44px; align-items: center; gap: 10px; margin-top: 32px; padding-bottom: 4px; color: var(--blue-deep); border-bottom: 1px solid currentColor; font-size: 13px; font-weight: 850; text-decoration: none; transition: gap 180ms ease; }
.video-lesson-back:hover { gap: 15px; }
.video-lesson-back:focus-visible { outline: 3px solid var(--blue-deep); outline-offset: 4px; }
.video-lesson--second .video-lesson-back { color: var(--mint); }
.video-lesson--second .video-lesson-back:focus-visible { outline-color: var(--mint); }
.video-lesson-back span { font-size: 18px; line-height: 1; }
.video-player-frame { position: relative; z-index: 1; justify-self: center; width: min(100%, 470px); overflow: hidden; background: #08090d; border-radius: 8px; box-shadow: 24px 28px 0 #ff9d2e, 0 28px 72px rgba(12, 13, 21, 0.24); }
.video-lesson--second .video-player-frame { box-shadow: 24px 28px 0 var(--mint), 0 28px 72px rgba(0, 0, 0, 0.38); }
.video-player-frame video { display: block; width: 100%; aspect-ratio: 9 / 16; max-height: 760px; object-fit: contain; background: #08090d; }

.tutorial-footer { color: #f7f8ff; background: var(--ink); }
.tutorial-footer > div { display: flex; min-height: 94px; align-items: center; justify-content: space-between; gap: 20px; color: #a7a8b5; font: 800 11px/1.4 var(--display); letter-spacing: 0.1em; }
.tutorial-footer a { display: inline-flex; align-items: center; gap: 10px; color: #f7f8ff; text-decoration: none; transition: color 180ms ease, gap 180ms ease; }
.tutorial-footer a:hover { gap: 15px; color: var(--mint); }
.tutorial-footer a:focus-visible { outline: 3px solid var(--mint); outline-offset: 4px; }

@media (max-width: 780px) {
  .tutorial-header-inner { min-height: 66px; }
  .tutorial-return { font-size: 12px; }
  .tutorial-hero::before { top: -97px; right: -92px; width: 310px; height: 310px; border-width: 50px; }
  .tutorial-hero-inner { min-height: 620px; grid-template-columns: 1fr; align-items: end; gap: 34px; padding: 90px 0 62px; }
  .tutorial-hero h1 { font-size: clamp(58px, 17vw, 84px); }
  .tutorial-lead { max-width: 31ch; margin-top: 25px; font-size: 15px; }
  .tutorial-hero-note { justify-self: start; padding: 12px 0 0; border-top: 1px solid rgba(255, 255, 255, 0.28); border-left: 0; }
  .tutorial-hero-note span { display: inline; margin-right: 9px; font-size: 24px; }
  .video-lesson-inner { grid-template-columns: 1fr; gap: 42px; padding: 68px 0 86px; }
  .video-lesson-intro { padding-top: 0; }
  .video-lesson h2 { max-width: none; font-size: clamp(42px, 12vw, 58px); }
  .video-lesson-intro > p:not(.video-lesson-index) { max-width: 34ch; font-size: 15px; }
  .video-lesson-back { margin-top: 25px; }
  .video-player-frame { width: min(calc(100% - 24px), 430px); margin: 0 auto; box-shadow: 16px 20px 0 #ff9d2e, 0 22px 56px rgba(12, 13, 21, 0.24); }
  .video-lesson--second .video-player-frame { box-shadow: 16px 20px 0 var(--mint), 0 22px 56px rgba(0, 0, 0, 0.38); }
  .video-player-frame video { max-height: none; }
  .tutorial-footer > div { min-height: 84px; font-size: 10px; }
}

@media (prefers-reduced-motion: no-preference) {
  .tutorial-hero-inner > *, .video-lesson-inner > * { animation: tutorial-enter 680ms cubic-bezier(0.16, 1, 0.3, 1) both; }
  .tutorial-hero-note, .video-player-frame { animation-delay: 110ms; }
}

@keyframes tutorial-enter {
  from { opacity: 0; filter: blur(8px); transform: translate3d(0, 22px, 0); }
  to { opacity: 1; filter: blur(0); transform: translate3d(0, 0, 0); }
}