/* =========================================================
   AI Adventure Club — Lessons
   Page-specific styles. Shared tokens and aic-* utilities
   come from ai-club.css.
   ========================================================= */

.page-ai-lessons {
  background: var(--paper);
}

/* ---------- Hero ---------- */
.ail-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.4rem, 6.5vw, 6.2rem) 0 clamp(3rem, 5.5vw, 5.2rem);
  background: var(--paper);
}
.ail-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 45% 55% at 78% 38%, rgba(183, 165, 255, 0.3), transparent 72%),
    linear-gradient(to right, rgba(16, 31, 51, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 31, 51, 0.035) 1px, transparent 1px);
  background-size: auto, 62px 62px, 62px 62px;
  -webkit-mask-image: linear-gradient(to right, #000 22%, transparent 82%);
  mask-image: linear-gradient(to right, #000 22%, transparent 82%);
}
.ail-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.ail-hero-copy { max-width: 41rem; }
.ail-eyebrow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #5b4bd6;
  box-shadow: 0 0 0 4px rgba(91, 75, 214, 0.12);
}
.ail-slash { color: rgba(16, 31, 51, 0.26); }
.ail-hero h1 {
  margin: 1.2rem 0 1.15rem;
  font-family: var(--serif);
  font-size: clamp(3.1rem, 5.4vw, 5.15rem);
  font-weight: 400;
  line-height: 0.97;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.ail-hero h1 em {
  color: #5b4bd6;
  font-style: italic;
}
.ail-lede {
  max-width: 34rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--body);
}
.ail-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.4rem;
  margin-top: 1.7rem;
}
.ail-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-trust li::before {
  content: "✓";
  margin-right: 0.45rem;
  color: var(--teal);
  font-size: 0.7rem;
}

/* Hero lesson map */
.ail-map-wrap {
  position: relative;
  justify-self: end;
  width: min(520px, 100%);
}
.ail-map {
  position: relative;
  z-index: 1;
  padding: 1.25rem;
  border: 1px solid rgba(16, 31, 51, 0.18);
  border-radius: 18px;
  background: #e9e5ff;
  box-shadow: 12px 14px 0 rgba(91, 75, 214, 0.12);
  transform: rotate(-1.2deg);
}
.ail-map-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.15rem 0.15rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #5b4bd6;
}
.ail-map-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}
.ail-map-stop {
  --stop: var(--aic-lime);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 128px;
  padding: 0.85rem;
  border: 1px solid rgba(16, 31, 51, 0.26);
  border-radius: 9px;
  background: var(--stop);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s;
}
.ail-map-stop:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 22px -18px rgba(16, 31, 51, 0.7);
}
.ail-stop-lime { --stop: #d7ff5f; }
.ail-stop-violet { --stop: #c9c2ff; }
.ail-stop-yellow { --stop: #ffd84d; }
.ail-stop-coral { --stop: #ffa48c; }
.ail-map-stop > span {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
}
.ail-map-stop b {
  margin-top: 1.4rem;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.05;
}
.ail-map-stop small {
  margin-top: 0.28rem;
  font-family: var(--mono);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(16, 31, 51, 0.58);
}
.ail-map-note {
  margin: 0.9rem 0.1rem 0;
  font-family: var(--mono);
  font-size: 0.54rem;
  letter-spacing: 0.05em;
  color: rgba(16, 31, 51, 0.52);
}
.ail-map-star {
  position: absolute;
  z-index: 2;
  top: -20px;
  right: 26px;
  color: #5b4bd6;
  font-size: 1.7rem;
  transform: rotate(12deg);
}

/* ---------- Lessons ---------- */
.ail-lessons {
  background: var(--aic-night);
  color: var(--paper);
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: end;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.ail-head-dark h2 {
  max-width: 15ch;
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(2.3rem, 4.1vw, 3.8rem);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.ail-head-dark > p {
  max-width: 36rem;
  color: rgba(248, 243, 233, 0.65);
  font-size: 0.94rem;
  line-height: 1.7;
}
.ail-lesson-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.ail-lesson {
  --lesson: #d7ff5f;
  display: flex;
  flex-direction: column;
  min-height: 390px;
  padding: 1.35rem;
  border: 1px solid rgba(16, 31, 51, 0.35);
  border-radius: 12px;
  background: var(--lesson);
  color: var(--ink);
}
.ail-lesson-violet { --lesson: #c9c2ff; }
.ail-lesson-yellow { --lesson: #ffd84d; }
.ail-lesson-coral { --lesson: #ffa48c; }
.ail-lesson-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid rgba(16, 31, 51, 0.22);
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ail-lesson-top span:last-child { color: rgba(16, 31, 51, 0.64); }
.ail-lesson h3 {
  margin-top: 1.15rem;
  max-width: 25ch;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.1vw, 1.9rem);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.015em;
}
.ail-lesson > p {
  margin-top: 0.65rem;
  max-width: 46ch;
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(16, 31, 51, 0.76);
}
.ail-try {
  margin-top: auto;
  padding: 0.9rem;
  border: 1px solid rgba(16, 31, 51, 0.2);
  border-radius: 7px;
  background: rgba(248, 243, 233, 0.66);
}
.ail-try-label {
  font-family: var(--mono);
  font-size: 0.53rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clay);
}
.ail-challenge {
  margin-top: 0.45rem;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.005em;
}
.ail-try details {
  margin-top: 0.65rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(16, 31, 51, 0.18);
}
.ail-try summary {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  list-style: none;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}
.ail-try summary::-webkit-details-marker { display: none; }
.ail-try summary::after {
  content: "+";
  font-size: 1rem;
  line-height: 1;
  color: var(--clay);
}
.ail-try details[open] summary::after { content: "–"; }
.ail-try details p {
  margin-top: 0.55rem;
  padding: 0.55rem 0.65rem;
  border-radius: 5px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.8rem;
  line-height: 1.45;
}
.ail-note-dark {
  margin-top: 1.4rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: rgba(248, 243, 233, 0.44);
}
.ail-note-dark::before {
  content: "✦";
  margin-right: 0.55rem;
  color: var(--aic-lime);
}

/* ---------- Session ---------- */
.ail-session {
  background: var(--paper);
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-session-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.ail-clock-card {
  padding: 1.4rem;
  border: 1px solid rgba(248, 243, 233, 0.2);
  border-radius: 10px;
  background: var(--aic-night);
  color: var(--paper);
}
.ail-card-label {
  font-family: var(--mono);
  font-size: 0.54rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-clock-card .ail-card-label { color: rgba(248, 243, 233, 0.48); }
.ail-clock {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.45rem;
  margin: 1.1rem 0 0;
  padding: 0;
}
.ail-clock li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-top: 0.7rem;
  border-top: 1px solid rgba(248, 243, 233, 0.24);
}
.ail-clock b {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 400;
  line-height: 1;
  color: var(--aic-lime);
}
.ail-clock span {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper);
}
.ail-clock small {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--sans);
  font-size: 0.58rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: rgba(248, 243, 233, 0.45);
}
.ail-recipe-card {
  padding: 1.4rem;
  border: 1px solid rgba(16, 31, 51, 0.2);
  border-radius: 10px;
  background: #ece9ff;
}
.ail-recipe {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 1rem;
}
.ail-recipe > div {
  min-height: 120px;
  padding: 0.8rem;
  border: 1px solid rgba(16, 31, 51, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.34);
  display: flex;
  flex-direction: column;
}
.ail-recipe > div > span {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--clay);
}
.ail-recipe b {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ail-recipe small {
  margin-top: 0.3rem;
  font-size: 0.68rem;
  line-height: 1.4;
  color: var(--body);
}
.ail-session-note {
  margin-top: 1.2rem;
  max-width: 62ch;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--muted);
}
.ail-session-note::before {
  content: "✦";
  margin-right: 0.55rem;
  color: var(--teal);
}

/* ---------- Labs ---------- */
.ail-labs {
  background: var(--white);
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-lab-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.ail-feature {
  padding: 1.35rem;
  border: 1px solid rgba(16, 31, 51, 0.18);
  border-radius: 9px;
  background: var(--paper);
}
.ail-feature-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid rgba(16, 31, 51, 0.16);
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clay);
}
.ail-feature-top small { color: var(--muted); }
.ail-feature h3 {
  margin-top: 1.05rem;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  line-height: 1.08;
}
.ail-feature > p { margin-top: 0.55rem; font-size: 0.84rem; line-height: 1.6; color: var(--body); }
.ail-feature-skill {
  margin-top: 1rem !important;
  padding-top: 0.7rem;
  border-top: 1px solid rgba(16, 31, 51, 0.14);
  font-family: var(--mono);
  font-size: 0.6rem !important;
  letter-spacing: 0.04em;
  color: var(--muted) !important;
}
.ail-feature-skill span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--clay);
  letter-spacing: 0.12em;
}
.ail-lab-list-wrap { margin-top: 1.8rem; }
.ail-lab-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.4rem;
  margin: 0.75rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(16, 31, 51, 0.22);
}
.ail-lab-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.65rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(16, 31, 51, 0.12);
}
.ail-lab-list li > span {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--clay);
  padding-top: 0.12rem;
}
.ail-lab-list li div { display: flex; flex-direction: column; gap: 0.08rem; }
.ail-lab-list small {
  font-family: var(--mono);
  font-size: 0.48rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-lab-list b { font-size: 0.84rem; font-weight: 700; line-height: 1.35; }
.ail-lab-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(16, 31, 51, 0.14);
}
.ail-lab-foot > p {
  max-width: 44ch;
  font-family: var(--mono);
  font-size: 0.57rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.ail-lab-foot .ail-actions { margin-top: 0; }

/* ---------- Advanced ---------- */
.ail-advanced {
  background: #e9e5ff;
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-process {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.55rem;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(16, 31, 51, 0.18);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.32);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}
.ail-process i { color: var(--clay); font-style: normal; }
.ail-advanced-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.4rem;
  margin: 1.2rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(16, 31, 51, 0.18);
}
.ail-advanced-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.65rem;
  padding: 0.68rem 0;
  border-bottom: 1px solid rgba(16, 31, 51, 0.12);
}
.ail-advanced-list li > span {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: #5b4bd6;
  padding-top: 0.12rem;
}
.ail-advanced-list li div { display: flex; flex-direction: column; gap: 0.08rem; }
.ail-advanced-list small {
  font-family: var(--mono);
  font-size: 0.48rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-advanced-list b { font-size: 0.84rem; font-weight: 700; line-height: 1.35; }
.ail-advanced-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(16, 31, 51, 0.14);
}
.ail-advanced-foot p {
  max-width: 52ch;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--body);
}

/* ---------- Compass ---------- */
.ail-compass {
  background: var(--paper-deep);
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-compass-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.ail-compass-grid article {
  padding: 1.25rem;
  border: 1px solid rgba(16, 31, 51, 0.18);
  border-top: 3px solid var(--teal);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.32);
}
.ail-compass-grid article:nth-child(2) { border-top-color: var(--clay); }
.ail-compass-grid article:nth-child(3) { border-top-color: #5b4bd6; }
.ail-compass-grid article > span {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--clay);
}
.ail-compass h3 {
  margin-top: 0.75rem;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.1;
}
.ail-compass p { margin-top: 0.5rem; font-size: 0.82rem; line-height: 1.6; color: var(--body); }
.ail-compass > .container > .aic-text-link { margin-top: 1.4rem; display: inline-flex; }

/* ---------- Final ---------- */
.ail-final .aic-final-grid { align-items: center; }
.ail-final-map {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  width: min(360px, 100%);
  justify-self: center;
}
.ail-final-map a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem;
  border: 1px solid rgba(248, 243, 233, 0.4);
  border-radius: 7px;
  background: rgba(248, 243, 233, 0.05);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.2s, background-color 0.2s;
}
.ail-final-map a:hover { border-color: var(--aic-lime); background: rgba(215, 255, 95, 0.08); }
.ail-final-map span { color: var(--aic-lime); font-size: 0.55rem; }


/* ---------- Watch & try ---------- */
.ail-watch {
  background: var(--white);
  padding: clamp(4rem, 7.5vw, 6.8rem) 0;
}
.ail-video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.ail-video {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(16, 31, 51, 0.18);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s, border-color 0.25s;
}
.ail-video:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 31, 51, 0.36);
  box-shadow: 0 20px 34px -26px rgba(16, 31, 51, 0.72);
}
.ail-video-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #d9d4ff;
}
.ail-video-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s var(--ease);
}
.ail-video:hover .ail-video-media img { transform: scale(1.035); }
.ail-video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ail-video-play::before {
  content: "";
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid rgba(248, 243, 233, 0.34);
  background: rgba(7, 30, 23, 0.9);
  transition: background-color 0.2s;
}
.ail-video-play::after {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  margin-left: 4px;
  border-left: 14px solid var(--paper);
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}
.ail-video:hover .ail-video-play::before { background: var(--aic-night); }
.ail-video-duration {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 0.16rem 0.38rem;
  border-radius: 3px;
  background: rgba(7, 30, 23, 0.88);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.52rem;
  letter-spacing: 0.06em;
}
.ail-video-copy {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  flex: 1;
  padding: 0.95rem 1rem 1rem;
}
.ail-video-kicker {
  font-family: var(--mono);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clay);
}
.ail-video-copy b {
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.ail-video-copy small {
  margin-top: auto;
  padding-top: 0.7rem;
  font-family: var(--mono);
  font-size: 0.54rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}
.ail-video-copy small span { color: var(--clay); }
.ail-watch-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem 1.4rem;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(16, 31, 51, 0.14);
}
.ail-watch-foot p {
  font-family: var(--mono);
  font-size: 0.57rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.ail-watch-foot p b { color: var(--ink); }


/* ---------- Click-to-load player ---------- */
.ail-player {
  width: min(980px, calc(100vw - 2rem), calc((100vh - 150px) * 16 / 9));
  max-height: calc(100vh - 2rem);
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(248, 243, 233, 0.2);
  border-radius: 12px;
  background: var(--aic-night);
  color: var(--paper);
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.75);
}
.ail-player::backdrop {
  background: rgba(4, 18, 14, 0.82);
  backdrop-filter: blur(6px);
}
.ail-player-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  border-bottom: 1px solid rgba(248, 243, 233, 0.14);
}
.ail-player-kicker {
  font-family: var(--mono);
  font-size: 0.5rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--aic-lime);
}
.ail-player-title {
  margin: 0.3rem 0 0;
  max-width: 36ch;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.ail-player-close {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid rgba(248, 243, 233, 0.28);
  border-radius: 50%;
  background: transparent;
  color: var(--paper);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}
.ail-player-close:hover { background: rgba(248, 243, 233, 0.1); border-color: rgba(248, 243, 233, 0.5); }
.ail-player-close:focus-visible { outline: 2px solid var(--aic-lime); outline-offset: 3px; }
.ail-player-frame {
  aspect-ratio: 16 / 9;
  width: 100%;
  background: #000;
}
.ail-player-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}
.ail-player-foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem 1.4rem;
  padding: 0.7rem 1.1rem 0.8rem;
  border-top: 1px solid rgba(248, 243, 233, 0.12);
  font-family: var(--mono);
  font-size: 0.53rem;
  letter-spacing: 0.04em;
  color: rgba(248, 243, 233, 0.5);
}
.ail-player-link { color: var(--aic-lime); text-decoration: none; border-bottom: 1px solid rgba(215, 255, 95, 0.45); }
.ail-player-link:hover { border-bottom-color: var(--aic-lime); }
@keyframes ail-player-in {
  from { opacity: 0; transform: translateY(8px) scale(0.99); }
  to { opacity: 1; transform: none; }
}
.ail-player[open] { animation: ail-player-in 0.22s var(--ease); }
@media (prefers-reduced-motion: reduce) {
  .ail-player[open] { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .ail-hero-grid, .ail-head, .ail-session-grid { grid-template-columns: 1fr; }
  .ail-map-wrap { justify-self: center; width: min(520px, 100%); }
  .ail-map { transform: none; }
  .ail-head-dark h2 { max-width: 20ch; }
  .ail-session-grid { gap: 0.9rem; }
  .ail-compass-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .ail-lesson-grid, .ail-lab-feature, .ail-advanced-list, .ail-lab-list, .ail-video-grid { grid-template-columns: 1fr; }
  .ail-lesson { min-height: 0; }
  .ail-compass-grid { grid-template-columns: 1fr; }
  .ail-advanced-list, .ail-lab-list { gap: 0; }
  .ail-head-dark > p { max-width: 42rem; }
}
@media (max-width: 700px) {
  .ail-hero { padding: 2.5rem 0 3rem; }
  .ail-hero h1 { font-size: clamp(2.7rem, 11.5vw, 4rem); letter-spacing: -0.03em; }
  .ail-lede { font-size: 0.94rem; }
  .ail-actions { align-items: flex-start; flex-direction: column; }
  .ail-actions .btn { width: 100%; justify-content: space-between; }
  .ail-trust { gap: 0.55rem 1rem; }
  .ail-map { padding: 0.9rem; }
  .ail-map-grid { gap: 0.45rem; }
  .ail-map-stop { min-height: 108px; padding: 0.7rem; }
  .ail-map-stop b { font-size: 1rem; margin-top: 0.9rem; }
  .ail-map-star { right: 14px; top: -17px; font-size: 1.35rem; }
  .ail-lessons, .ail-session, .ail-labs, .ail-advanced, .ail-compass { padding: 3.5rem 0; }
  .ail-lesson { padding: 1.1rem; }
  .ail-lesson h3 { font-size: 1.5rem; }
  .ail-clock { grid-template-columns: 1fr 1fr; }
  .ail-clock li:last-child { grid-column: 1 / -1; }
  .ail-recipe { grid-template-columns: 1fr 1fr; }
  .ail-lab-foot, .ail-advanced-foot { align-items: flex-start; flex-direction: column; }
  .ail-lab-foot .ail-actions { align-items: flex-start; flex-direction: column; }
  .ail-lab-foot .btn { width: 100%; justify-content: space-between; }
  .ail-video-play::before { width: 46px; height: 46px; }
  .ail-video-play::after { border-left-width: 12px; border-top-width: 7px; border-bottom-width: 7px; }
  .ail-watch-foot { align-items: flex-start; flex-direction: column; }
  .ail-player { width: calc(100vw - 0.8rem); max-height: calc(100vh - 0.8rem); }
  .ail-player-head { padding: 0.8rem; }
  .ail-player-title { font-size: 1rem; }
  .ail-player-close { width: 34px; height: 34px; font-size: 1.2rem; }
  .ail-player-foot { align-items: flex-start; flex-direction: column; padding: 0.65rem 0.8rem 0.7rem; }
  .ail-final .aic-final-actions { align-items: flex-start; flex-direction: column; }
  .ail-final .aic-final-actions .btn { width: 100%; justify-content: space-between; }
  .ail-final-map { width: min(320px, 100%); }
}
@media (prefers-reduced-motion: reduce) {
  .ail-map-stop:hover { transform: none; }
}