:root {
  --bg: #141b30;
  --bg-soft: #1b2440;
  --accent: #5b8def;
  --accent2: #85ffe4;
  --accent3: #b5b7ff;
  --text: #f5f7ff;
  --muted: #99a3c4;
  --card: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.08);
  --radius: 18px;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.35);
  --max: 1140px;
  --font-display: "Space Grotesk", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "Space Grotesk", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(91, 141, 239, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(181, 183, 255, 0.12), transparent 60%),
    radial-gradient(ellipse 70% 50% at 50% 110%, rgba(133, 255, 228, 0.07), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: rgba(133, 255, 228, 0.35); color: #fff; }

#neural-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  opacity: 0.7;
}

.cursor-glow {
  position: fixed;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 141, 239, 0.13), transparent 65%);
  pointer-events: none;
  z-index: -1;
  transform: translate(-50%, -50%);
  transition: opacity 0.4s ease;
  opacity: 0;
}

/* ============ Header ============ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(20, 27, 48, 0.65);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
}
.logo-icon img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  object-fit: cover;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1rem;
}
.logo-role { color: var(--muted); font-size: 0.6rem; letter-spacing: 0.02em; }
.nav-links { display: flex; gap: 1.4rem; font-size: 0.82rem; }
.nav-links a {
  position: relative;
  color: #e6ebff;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.05em;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease-out;
  border-radius: 2px;
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: #fff; }
.nav-links a.active::after { transform: scaleX(1); }

/* ============ Hero ============ */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(70px, 12vh, 130px) 20px 40px;
  position: relative;
}
.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--accent2);
  margin: 0 0 1.4rem;
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 1.6rem;
}
.hero-line { display: block; }
.hero-highlight {
  background: linear-gradient(100deg, #8ef 0%, var(--accent) 45%, var(--accent3) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--muted);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  letter-spacing: 0.14em;
  margin: 0 0 2.4rem;
}
.hero-row {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 3.2rem;
}
.hero-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 1.25rem 1.4rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  width: 100%;
  max-width: 400px;
  justify-self: end;
}
.hero-card-head { display: flex; align-items: center; gap: 0.7rem; }
.hero-card-head img {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.hc-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}
.hc-role { display: block; color: var(--accent2); font-size: 0.72rem; letter-spacing: 0.05em; }
.hc-desc { margin: 0; color: var(--muted); font-size: 0.85rem; line-height: 1.65; }

.hero-cta { display: flex; gap: 0.9rem; flex-wrap: wrap; }

/* Buttons */
.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  font-family: var(--font-body);
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}
.btn-primary {
  background: linear-gradient(95deg, var(--accent2), var(--accent));
  color: #060910;
  box-shadow: 0 8px 26px rgba(91, 141, 239, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(133, 255, 228, 0.4);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  backdrop-filter: blur(4px);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--accent2);
  background: rgba(133, 255, 228, 0.08);
}
.btn-arrow { transition: transform 0.22s ease; }
.btn-primary:hover .btn-arrow, .btn-ghost:hover .btn-arrow { transform: translateX(4px); }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.6rem;
}
.stat { display: flex; flex-direction: column; gap: 0.15rem; align-items: center; text-align: center; }
.stat-value {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  background: linear-gradient(120deg, #fff, var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-value small { font-size: 0.6em; }
.stat-now { background: linear-gradient(120deg, var(--accent2), var(--accent)); -webkit-background-clip: text; background-clip: text; }
.stat-label { color: var(--muted); font-size: 0.72rem; letter-spacing: 0.04em; }

.hero-offer {
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.7;
  margin: 0 0 2rem;
}
.hero-offer em {
  font-style: normal;
  color: var(--accent2);
}

.cover-strip {
  display: block;
  overflow: hidden;
  margin-top: 3.4rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.cover-track {
  display: flex;
  gap: 1rem;
  width: max-content;
  animation: marquee 170s linear infinite;
}
.cover-track a { line-height: 0; flex-shrink: 0; }
.cover-strip:hover .cover-track { animation-play-state: paused; }
.cover-track img {
  height: 100px;
  border-radius: 8px;
  opacity: 0.85;
  transition: opacity 0.25s ease;
}
.cover-strip:hover .cover-track img { opacity: 1; }
@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ============ Sections ============ */
section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(50px, 9vh, 90px) 20px clamp(46px, 8vh, 80px);
  position: relative;
}

/* セクションごとの背景の雰囲気（全幅バンド） */
#udemy::before, #kindle::before, #apps::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
}
#udemy::before {
  background:
    radial-gradient(70% 55% at 50% 0%, rgba(181, 183, 255, 0.18), transparent 65%),
    linear-gradient(180deg, rgba(38, 31, 62, 0.6), rgba(38, 31, 62, 0.18) 50%, transparent 92%);
  border-top: 1px solid rgba(181, 183, 255, 0.32);
}
#kindle::before {
  background:
    radial-gradient(70% 55% at 10% 0%, rgba(255, 138, 168, 0.15), transparent 65%),
    radial-gradient(50% 40% at 95% 45%, rgba(255, 120, 150, 0.07), transparent 70%),
    linear-gradient(180deg, rgba(58, 26, 42, 0.55), rgba(58, 26, 42, 0.16) 50%, transparent 92%);
  border-top: 1px solid rgba(255, 138, 168, 0.3);
}
#apps::before {
  background:
    radial-gradient(70% 55% at 90% 0%, rgba(91, 141, 239, 0.22), transparent 65%),
    repeating-linear-gradient(90deg, rgba(91, 141, 239, 0.05) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(91, 141, 239, 0.05) 0 1px, transparent 1px 72px),
    linear-gradient(180deg, rgba(17, 31, 60, 0.65), rgba(17, 31, 60, 0.2) 50%, transparent 92%);
  border-top: 1px solid rgba(91, 141, 239, 0.38);
}

/* ============ 宇宙モチーフ（セクションごとの風景） ============ */

/* ヒーロー：深宇宙の星野（タイル状に瞬く星） */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1.2px 1.2px at 12% 25%, rgba(255, 255, 255, 0.7), transparent 100%),
    radial-gradient(1px 1px at 68% 12%, rgba(181, 183, 255, 0.75), transparent 100%),
    radial-gradient(1.5px 1.5px at 85% 42%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1px 1px at 35% 72%, rgba(133, 255, 228, 0.55), transparent 100%),
    radial-gradient(1.3px 1.3px at 55% 48%, rgba(255, 255, 255, 0.4), transparent 100%);
  background-size: 340px 300px, 420px 360px, 560px 460px, 640px 520px, 480px 400px;
  animation: twinkle 7s ease-in-out infinite;
}

#udemy::after, #kindle::after, #apps::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
}

/* Udemy：銀河系 ― プロシージャル生成画像（imgs/udemy/galaxy.webp） */
#udemy::after {
  background: url("imgs/udemy/galaxy.webp") no-repeat right -300px top -140px / 900px auto;
  opacity: 0.55;
}

/* Kindle：星雲 ― プロシージャル生成画像（imgs/kindle/nebula.webp） */
#kindle::after {
  background: url("imgs/kindle/nebula.webp") no-repeat left -280px top -220px / 950px auto;
  opacity: 0.5;
}

/* Apps：超新星爆発 ― プロシージャル生成画像（imgs/apps/supernova.webp） */
#apps::after {
  background: url("imgs/apps/supernova.webp") no-repeat right -320px top -280px / 780px auto;
  opacity: 0.32;
  animation: novaPulse 8s ease-in-out infinite;
}
@keyframes novaPulse {
  0%, 100% { opacity: 0.26; }
  50% { opacity: 0.36; }
}

/* About：ブラックホール ― 静かな降着円盤 */
#about::after {
  content: "";
  position: absolute;
  right: 2%;
  top: -30px;
  width: 360px;
  height: 360px;
  z-index: -1;
  pointer-events: none;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, transparent 27%, rgba(255, 185, 130, 0.2) 33%, rgba(181, 183, 255, 0.13) 41%, rgba(91, 141, 239, 0.07) 48%, transparent 60%);
  transform: rotate(-18deg) scaleY(0.5);
}

@keyframes twinkle {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* セクション番号もテーマ色に合わせる */
#udemy .section-index { color: var(--accent3); }
#udemy .section-index::after { background: linear-gradient(90deg, var(--accent3), transparent); }
#kindle .section-index { color: #ff9db8; }
#kindle .section-index::after { background: linear-gradient(90deg, #ff9db8, transparent); }
#apps .section-index { color: var(--accent); }
#apps .section-index::after { background: linear-gradient(90deg, var(--accent), transparent); }

/* Kindleの棚見出しもローズ系に */
#kindle .shelf-title { color: #ff9db8; }
#kindle .shelf-title::after { background: linear-gradient(90deg, rgba(255, 157, 184, 0.35), transparent); }
.anchor-compat { position: absolute; top: -70px; }
.section-head { margin-bottom: 2rem; position: relative; }
.section-index {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--accent2);
}
.section-index::after {
  content: "";
  display: inline-block;
  width: 46px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent2), transparent);
  vertical-align: middle;
  margin-left: 0.7rem;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4.5vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0.35rem 0 0.5rem;
}
.section-lead { color: var(--muted); font-size: 0.9rem; margin: 0; max-width: 640px; }

/* ============ Apps ============ */
.apps-grid { grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); margin-bottom: 2.2rem; }
.app-card { padding: 0.9rem; gap: 0.6rem; }
.app-card .card-media img { width: 100%; height: auto; }
.app-name { font-size: 0.9rem; font-weight: 700; line-height: 1.4; margin: 0.15rem 0 0; }
.store-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: auto; }
.store-badges img { height: 40px; width: auto; display: block; }
.store-badges a { line-height: 0; transition: opacity 0.2s ease; }
.store-badges a:hover { opacity: 0.8; }
.apps-note {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.82rem;
  margin: 1.6rem 0 0;
}

/* ============ Cards ============ */
.grid { display: grid; gap: 1.2rem; }
.udemy-grid { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.book-grid { grid-template-columns: repeat(auto-fill, minmax(185px, 1fr)); margin-bottom: 2.2rem; }

.card {
  background: var(--card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(133, 255, 228, 0.35);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(133, 255, 228, 0.12);
}
.card-media {
  display: block;
  border-radius: 12px;
  overflow: hidden;
  line-height: 0;
}
.card-media img {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.card:hover .card-media img { transform: scale(1.04); }

.card-body { display: flex; flex-direction: column; gap: 0.45rem; flex: 1; }
.card-title { font-size: 0.95rem; font-weight: 700; line-height: 1.4; margin: 0.3rem 0 0; }
.card-desc { font-size: 0.78rem; color: var(--muted); margin: 0; }

/* Coupon */
.coupon-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.3rem;
  align-items: flex-start;
}
.coupon-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: linear-gradient(90deg, rgba(133, 255, 228, 0.14), rgba(91, 141, 239, 0.14));
  border: 1px dashed rgba(133, 255, 228, 0.5);
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  color: var(--text);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.72rem;
  max-width: 100%;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.coupon-chip:hover { border-color: var(--accent2); background: rgba(133, 255, 228, 0.16); }
.coupon-code { overflow-wrap: anywhere; text-align: left; }
.coupon-copy {
  flex-shrink: 0;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 700;
  color: #060910;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 6px;
  padding: 0.18rem 0.55rem;
}
.coupon-chip.copied { border-style: solid; border-color: var(--accent2); }
.coupon-expiry { font-size: 0.72rem; color: var(--muted); }
.coupon-expiry .days-left { color: var(--accent2); font-weight: 700; }
.card-cta { margin-top: auto; align-self: flex-start; }

/* ============ Kindle shelves ============ */
.shelf-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent3);
  margin: 0 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.shelf-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(181, 183, 255, 0.3), transparent);
}
.book-card { text-align: center; padding: 0.85rem; }
.book-title { font-size: 0.88rem; font-weight: 700; line-height: 1.35; margin: 0.55rem 0 0; }
.book-desc { font-size: 0.74rem; color: var(--muted); margin: 0.15rem 0 0; }

/* ============ About ============ */
.about-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: clamp(1.4rem, 3vw, 2.4rem);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.about-head {
  display: flex;
  align-items: center;
  gap: 1.3rem;
  margin-bottom: 1.5rem;
}
.about-avatar img {
  width: 92px;
  height: 92px;
  border-radius: 26px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  display: block;
}
.about-id { min-width: 0; }
.about-name { font-family: var(--font-display); font-size: 1.6rem; margin: 0; letter-spacing: 0.02em; }
.about-role {
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  margin: 0.2rem 0 0.4rem;
}
.about-motto {
  font-weight: 700;
  font-size: 0.95rem;
  background: linear-gradient(95deg, var(--accent2), var(--accent), var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0;
}
.about-x {
  margin-left: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.about-x:hover {
  border-color: rgba(133, 255, 228, 0.5);
  box-shadow: 0 0 22px rgba(133, 255, 228, 0.18);
  transform: translateY(-1px);
}
.about-quote {
  position: relative;
  margin: 0 0 0.9rem;
  padding: 0.15rem 0 0.15rem 1.2rem;
  color: #ccd5f2;
  font-size: 0.95rem;
  line-height: 1.9;
  max-width: 760px;
}
.about-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent2), var(--accent), var(--accent3));
}
.about-author { color: var(--muted); font-size: 0.85rem; margin: 0 0 1.6rem; }
.about-author em { font-style: normal; font-weight: 700; color: var(--accent3); }
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
}
.about-side { display: flex; flex-direction: column; gap: 1rem; }
.about-side .about-panel:last-child { flex: 1; }
.about-panel {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 16px;
  padding: 1.2rem 1.3rem;
}
.about-subhead {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  margin: 0 0 0.9rem;
}
.about-subhead::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.14), transparent);
}
.subhead-en {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent2);
}
.about-timeline {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.86rem;
  text-align: left;
}
.about-timeline::before {
  content: "";
  position: absolute;
  left: 5.5px;
  top: 0.8em;
  bottom: 0.8em;
  width: 1px;
  background: rgba(255, 255, 255, 0.16);
}
.about-timeline li { position: relative; padding-left: 1.35rem; }
.about-timeline li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.52em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent2);
  box-shadow: 0 0 10px rgba(133, 255, 228, 0.55);
}
.about-exp {
  margin-left: 6px;
  padding: 0.15rem 0 0.15rem 1.05rem;
  border-left: 1px dashed rgba(255, 255, 255, 0.16);
}
.about-sublabel {
  color: var(--accent3);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin: 0 0 0.45rem;
}
.about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.84rem;
  text-align: left;
}
.about-list li { padding-left: 1.1rem; position: relative; }
.about-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent2);
}
.skill-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}
.skill-chip {
  font-size: 0.78rem;
  font-weight: 600;
  color: #cfe0ff;
  border: 1px solid rgba(91, 141, 239, 0.45);
  background: rgba(91, 141, 239, 0.1);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}
.chip-etc { color: var(--muted); font-size: 0.78rem; }
.cred-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-start;
}
.cred {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent3);
  border: 1px solid rgba(181, 183, 255, 0.35);
  background: rgba(181, 183, 255, 0.07);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
}
.cred-strong {
  color: var(--accent2);
  border-color: rgba(133, 255, 228, 0.45);
  background: rgba(133, 255, 228, 0.08);
}
.cred-etc {
  color: var(--muted);
  font-size: 0.78rem;
  align-self: center;
}
.x-plain {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
  transition: color 0.2s ease;
}
.x-plain:hover { color: #fff; }

/* ============ Footer ============ */
footer {
  max-width: var(--max);
  margin: clamp(60px, 10vh, 100px) auto 0;
  padding: 26px 20px 34px;
  color: var(--muted);
  font-size: 0.72rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.footer-legal {
  width: 100%;
  margin: 0 0 0.4rem;
  font-size: 0.62rem;
  color: rgba(153, 163, 196, 0.65);
  line-height: 1.6;
}
.footer-nav { display: flex; gap: 1.1rem; }
.footer-nav a { color: var(--muted); text-decoration: none; transition: color 0.2s ease; }
.footer-nav a:hover { color: #fff; }

/* ============ Animations ============ */
.reveal-load {
  opacity: 0;
  transform: translateY(26px);
  animation: riseIn 0.85s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: var(--d, 0s);
}
@keyframes riseIn {
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--rd, 0s);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-load, .reveal { opacity: 1; transform: none; animation: none; transition: none; }
  .cover-track { animation: none; }
  .hero::before, #udemy::after, #apps::after { animation: none; }
  .card, .card-media img, .btn-primary, .btn-ghost { transition: none; }
  #neural-bg { display: none; }
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .app-feature { grid-template-columns: 1fr; gap: 1.6rem; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 1.3rem 1rem; }
  .hero-row { grid-template-columns: 1fr; gap: 1.8rem; }
  .hero-card { justify-self: start; }
}

@media (max-width: 600px) {
  .nav { padding: 10px 16px; }
  .logo-role { display: none; }
  .nav-links { gap: 0.9rem; font-size: 0.76rem; }
  .hero { padding-top: 58px; }
  .hero-title { font-size: clamp(2.3rem, 11.5vw, 3rem); }
  .hero-sub { letter-spacing: 0.06em; }
  .hero-cta { gap: 0.7rem; }
  .btn-primary, .btn-ghost { padding: 0.68rem 1.15rem; font-size: 0.8rem; }
  .cover-strip { margin-top: 2.4rem; }
  .cover-track img { height: 78px; }
  .hero-offer { font-size: 0.92rem; }
  .udemy-grid { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.8rem; }
  .book-card { padding: 0.7rem; }
  .book-title { font-size: 0.8rem; }
  .book-desc { font-size: 0.7rem; }
  #about::after { display: none; }
  .about-head { flex-wrap: wrap; }
  .about-x { margin-left: 0; align-self: center; }
  .about-grid { grid-template-columns: 1fr; }
  footer { justify-content: center; text-align: center; }
}