:root {
  --bg-1: #030711;
  --bg-2: #081127;
  --bg-3: #120c2a;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.035);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eef3ff;
  --muted: #afbddf;
  --muted-2: #90a4d0;
  --cyan: #67f3ff;
  --blue: #4da3ff;
  --violet: #9381ff;
  --green: #65efc4;
  --gold: #ffc457;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.22);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  padding-top: 94px;
  font-family: "Inter", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(77, 163, 255, 0.14), transparent 22%),
    radial-gradient(circle at 80% 10%, rgba(147, 129, 255, 0.14), transparent 20%),
    radial-gradient(circle at 50% 55%, rgba(103, 243, 255, 0.06), transparent 28%),
    linear-gradient(180deg, var(--bg-1), var(--bg-2) 48%, var(--bg-3));
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 18%),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.02), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0.5;
  z-index: -1;
}

img {
  max-width: 100%;
  display: block;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

main section[id] {
  scroll-margin-top: 120px;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

/* ===== NAVBAR ===== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1200;
  background: rgba(5, 10, 22, 0.42);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: min(920px, 76vw);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(
    90deg,
    transparent,
    rgba(103, 243, 255, 0.34),
    rgba(147, 129, 255, 0.34),
    transparent
  );
  opacity: 0.75;
  pointer-events: none;
}

.site-header.scrolled {
  background: rgba(5, 10, 22, 0.82);
  border-bottom-color: rgba(255, 255, 255, 0.09);
  box-shadow:
    0 18px 50px rgba(0, 0, 0, 0.34),
    0 0 30px rgba(77, 163, 255, 0.08);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--violet));
  box-shadow: 0 0 18px rgba(103, 243, 255, 0.42);
  transition: width 0.08s linear;
  z-index: 2;
}

.nav {
  min-height: 94px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.brand-premium {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.72rem 1rem 0.72rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 12px 30px rgba(0, 0, 0, 0.18);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.brand-premium:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 16px 34px rgba(0, 0, 0, 0.22),
    0 0 18px rgba(103, 243, 255, 0.08);
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
}

.brand-orbit {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(103, 243, 255, 0.45);
  box-shadow: 0 0 18px rgba(103, 243, 255, 0.18);
  animation: spinOrbit 9s linear infinite;
}

.brand-core {
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffffff, var(--cyan), var(--blue));
  box-shadow:
    0 0 18px rgba(103, 243, 255, 0.45),
    0 0 30px rgba(147, 129, 255, 0.18);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-title {
  font-family: "Orbitron", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #f5f8ff;
}

.brand-subtitle {
  margin-top: 0.2rem;
  color: #95a9d8;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.03),
    0 16px 34px rgba(0, 0, 0, 0.16);
  backdrop-filter: blur(16px);
}

.nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 42px;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  color: #cad6f8;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition:
    color 0.28s ease,
    background 0.28s ease,
    transform 0.28s ease,
    box-shadow 0.28s ease,
    border-color 0.28s ease;
}

.nav-links a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.nav-links a.active {
  color: #ffffff;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 0 18px rgba(103, 243, 255, 0.12);
}

.nav-links .nav-cta {
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, rgba(103, 243, 255, 0.96), rgba(77, 163, 255, 0.96), rgba(147, 129, 255, 0.96));
  color: #09111f;
  font-weight: 800;
  box-shadow:
    0 10px 26px rgba(77, 163, 255, 0.22),
    inset 0 1px 0 rgba(255,255,255,0.42);
}

.nav-links .nav-cta::before {
  content: "";
  position: absolute;
  inset: -120% auto -120% -30%;
  width: 60%;
  transform: rotate(20deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.45), transparent);
  transition: transform 0.65s ease;
}

.nav-links .nav-cta:hover::before {
  transform: translateX(230%) rotate(20deg);
}

.nav-links .nav-cta:hover {
  color: #09111f;
  filter: brightness(1.05);
}

.nav-toggle {
  display: none;
  width: 50px;
  height: 50px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: #eef3ff;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== HERO ===== */

.hero {
  position: relative;
  padding: 56px 0 28px;
  overflow: hidden;
}

.cinematic-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(103, 243, 255, 0.06), transparent 30%),
    radial-gradient(circle at 80% 20%, rgba(147, 129, 255, 0.08), transparent 28%);
  pointer-events: none;
}

.hero-noise {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0.5px, transparent 0.5px);
  background-size: 12px 12px;
  mix-blend-mode: screen;
}

.hero-light {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  opacity: 0.45;
}

.hero-light-1 {
  width: 240px;
  height: 240px;
  left: 8%;
  top: 12%;
  background: rgba(77, 163, 255, 0.22);
}

.hero-light-2 {
  width: 320px;
  height: 320px;
  right: 6%;
  bottom: 6%;
  background: rgba(147, 129, 255, 0.18);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2rem;
  padding-top: 20px;
  padding-bottom: 20px;
}

.hero-copy {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.3rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-badge,
.section-kicker,
.card-topline,
.video-tag,
.short-tag,
.media-badge,
.latest-label,
.creator-mini,
.pdf-mini,
.chapter-mini {
  display: inline-block;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 1rem 0 0;
  font-family: "Orbitron", sans-serif;
  font-size: clamp(3.4rem, 8vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  text-shadow: 0 0 26px rgba(103, 243, 255, 0.08);
}

.hero h1 span {
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text {
  margin: 1.3rem 0 0;
  max-width: 620px;
  color: var(--muted);
  line-height: 1.85;
  font-size: clamp(1.05rem, 2vw, 1.18rem);
}

.hero-manifesto {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-top: 1.35rem;
  padding: 1rem 1.05rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.02));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.hero-manifesto-line {
  width: 3px;
  min-width: 3px;
  align-self: stretch;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--cyan), var(--blue), var(--violet));
  box-shadow: 0 0 18px rgba(103,243,255,0.25);
}

.hero-manifesto p {
  margin: 0;
  color: #dce7ff;
  font-size: 0.98rem;
  line-height: 1.75;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

/* ===== QUICK UI ===== */

.quick-ui-section {
  padding: 6px 0 34px;
}

.quick-ui-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.quick-ui-card {
  position: relative;
  overflow: hidden;
  min-height: 190px;
  padding: 1.3rem;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.08);
  background:
    radial-gradient(circle at 15% 15%, rgba(103,243,255,0.08), transparent 30%),
    radial-gradient(circle at 85% 85%, rgba(147,129,255,0.08), transparent 34%),
    linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.quick-ui-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,255,255,0.15);
  box-shadow:
    0 0 24px rgba(103,243,255,0.10),
    0 22px 54px rgba(0,0,0,0.24);
}

.quick-ui-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: #c8d7fb;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.quick-ui-card h3 {
  margin: 0.95rem 0 0.6rem;
  font-size: 1.22rem;
}

.quick-ui-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.quick-ui-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  color: #edf4ff;
  font-weight: 700;
}

.quick-ui-link span {
  color: var(--cyan);
}

/* ===== BUTTONS PREMIUM ===== */

.btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.72rem;
  min-height: 50px;
  padding: 0.95rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: none;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease,
    filter 0.25s ease,
    background 0.25s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: -120% auto -120% -30%;
  width: 42%;
  transform: rotate(20deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.36), transparent);
  transition: transform 0.7s ease;
  z-index: -1;
}

.btn:hover::before {
  transform: translateX(300%) rotate(20deg);
}

.btn:hover {
  transform: translateY(-3px);
  filter: brightness(1.04);
}

.btn-text {
  position: relative;
  z-index: 1;
}

.btn-icon {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  min-width: 1.35rem;
  font-size: 0.95rem;
  transition: transform 0.25s ease;
}

.btn:hover .btn-icon {
  transform: translateX(2px);
}

.btn-primary {
  background: linear-gradient(135deg, rgba(103,243,255,0.98), rgba(77,163,255,0.98), rgba(147,129,255,0.98));
  color: #09111f;
  box-shadow:
    0 14px 34px rgba(77, 163, 255, 0.24),
    inset 0 1px 0 rgba(255,255,255,0.42);
}

.btn-secondary {
  color: var(--text);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 14px 30px rgba(0,0,0,0.16);
}

/* ===== HERO VISUAL ===== */

.hero-visual {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
}

.hero-aura {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(147, 129, 255, 0.18), transparent 65%);
  filter: blur(22px);
}

.planet-core {
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.98), rgba(103, 243, 255, 0.42), rgba(77, 163, 255, 0.16) 68%, transparent 78%);
  box-shadow:
    0 0 70px rgba(103, 243, 255, 0.28),
    0 0 140px rgba(147, 129, 255, 0.18);
  z-index: 2;
  animation: pulseCore 5.8s ease-in-out infinite;
}

.orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.11);
}

.orbit-1 { width: 270px; height: 270px; animation: spinOrbit 16s linear infinite; }
.orbit-2 { width: 350px; height: 350px; border-color: rgba(77, 163, 255, 0.18); animation: spinOrbit 24s linear infinite reverse; }
.orbit-3 { width: 430px; height: 430px; border-color: rgba(147, 129, 255, 0.18); animation: spinOrbit 34s linear infinite; }
.orbit-4 { width: 500px; height: 500px; border-color: rgba(103, 243, 255, 0.08); animation: spinOrbit 44s linear infinite reverse; }

.spark {
  position: absolute;
  border-radius: 50%;
  background: rgba(103, 243, 255, 0.85);
  box-shadow: 0 0 18px rgba(103, 243, 255, 0.9);
}

.spark-1 { width: 8px; height: 8px; top: 92px; right: 146px; animation: floatSpark 4s ease-in-out infinite; }
.spark-2 { width: 6px; height: 6px; bottom: 112px; left: 120px; animation: floatSpark 5s ease-in-out infinite reverse; }
.spark-3 { width: 10px; height: 10px; bottom: 68px; right: 98px; animation: floatSpark 6s ease-in-out infinite; }

@keyframes spinOrbit {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulseCore {
  0%, 100% {
    transform: scale(1) translateY(0);
    box-shadow: 0 0 70px rgba(103, 243, 255, 0.28), 0 0 140px rgba(147, 129, 255, 0.18);
  }
  50% {
    transform: scale(1.05) translateY(-7px);
    box-shadow: 0 0 90px rgba(103, 243, 255, 0.36), 0 0 170px rgba(147, 129, 255, 0.24);
  }
}

@keyframes floatSpark {
  0%, 100% { transform: translateY(0px); opacity: 0.85; }
  50% { transform: translateY(-12px); opacity: 1; }
}

/* ===== HEADINGS ===== */

.section-heading {
  text-align: center;
  margin-bottom: 2.2rem;
}

.section-heading h2 {
  margin: 0.9rem 0 0.8rem;
  font-size: clamp(2rem, 4vw, 3rem);
}

.section-heading p {
  margin: 0 auto;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.8;
}

/* ===== PDF ===== */

.pdf-section {
  padding: 34px 0 38px;
}

.pdf-shell {
  display: grid;
  grid-template-columns: 0.94fr 1.06fr;
  gap: 24px;
  align-items: center;
  padding: 1.2rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 14% 20%, rgba(103,243,255,0.08), transparent 28%),
    radial-gradient(circle at 88% 80%, rgba(147,129,255,0.10), transparent 34%),
    linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255,255,255,0.04);
}

.pdf-cover-wrap {
  position: relative;
}

.pdf-cover {
  position: relative;
  display: block;
  min-height: 470px;
  padding: 1.35rem;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  background:
    radial-gradient(circle at 50% 28%, rgba(103,243,255,0.08), transparent 26%),
    radial-gradient(circle at 50% 62%, rgba(147,129,255,0.08), transparent 34%),
    linear-gradient(145deg, rgba(9,16,34,0.97), rgba(17,13,42,0.95));
  box-shadow:
    0 22px 60px rgba(0,0,0,0.30),
    0 0 26px rgba(103,243,255,0.08);
  transition: transform 0.32s ease, box-shadow 0.32s ease, border-color 0.32s ease;
}

.pdf-cover:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.14);
  box-shadow:
    0 26px 70px rgba(0,0,0,0.34),
    0 0 34px rgba(103,243,255,0.12);
}

.pdf-cover::before {
  content: "";
  position: absolute;
  inset: auto -14% -12% auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103,243,255,0.14), transparent 68%);
  filter: blur(18px);
  pointer-events: none;
}

.pdf-cover-badge {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.09);
  color: #eef3ff;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.pdf-cover-art {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 260px;
  margin-top: 1.2rem;
  margin-bottom: 1.4rem;
}

.pdf-cover-art img {
  width: min(100%, 360px);
  max-height: 320px;
  object-fit: contain;
  filter:
    drop-shadow(0 0 24px rgba(103,243,255,0.18))
    drop-shadow(0 0 44px rgba(147,129,255,0.12));
  transition: transform 0.35s ease, filter 0.35s ease;
}

.pdf-cover:hover .pdf-cover-art img {
  transform: scale(1.03);
  filter:
    drop-shadow(0 0 28px rgba(103,243,255,0.22))
    drop-shadow(0 0 56px rgba(147,129,255,0.16));
}

.pdf-cover-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 120px;
}

.pdf-cover-series {
  color: #cfdcff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.pdf-cover h3 {
  margin: 0.9rem 0 0.75rem;
  font-family: "Orbitron", sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 0.98;
  color: #f8fbff;
}

.pdf-cover p {
  margin: 0;
  color: #c6d4f5;
  line-height: 1.75;
  max-width: 420px;
}

.pdf-content h3 {
  margin: 1rem 0 0.9rem;
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.08;
}

.pdf-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  font-size: 1rem;
  max-width: 640px;
}

.pdf-quote {
  margin: 1.3rem 0 0;
  padding: 1rem 1.1rem;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.02));
  color: #eef3ff;
  line-height: 1.75;
  font-style: italic;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.pdf-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.3rem;
}

.pdf-points span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: #dce7ff;
  font-size: 0.82rem;
  font-weight: 600;
}

.pdf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.55rem;
}

.pdf-note {
  margin-top: 1rem !important;
  color: var(--muted-2);
  font-size: 0.92rem !important;
  line-height: 1.7 !important;
}

/* ===== DOWNLOAD ===== */

.download-section {
  padding: 18px 0 36px;
}

.download-shell {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  align-items: center;
  padding: 1.6rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 15% 20%, rgba(103, 243, 255, 0.08), transparent 30%),
    radial-gradient(circle at 85% 80%, rgba(147, 129, 255, 0.10), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.025));
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.download-shell::before {
  content: "";
  position: absolute;
  inset: auto -10% -35% auto;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 163, 255, 0.16), transparent 70%);
  filter: blur(12px);
  pointer-events: none;
}

.download-copy h2 {
  margin: 1rem 0 0.9rem;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
}

.download-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  max-width: 620px;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.3rem;
}

.download-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  color: #dce7ff;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.download-note {
  margin-top: 1rem !important;
  font-size: 0.92rem;
  color: var(--muted-2);
}

.download-visual {
  position: relative;
}

.download-frame {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(6, 10, 20, 0.8);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.28),
    0 0 30px rgba(103, 243, 255, 0.08);
  aspect-ratio: 16 / 10;
  max-width: 540px;
  margin-left: auto;
}

.download-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.download-glow {
  position: absolute;
  inset: auto auto 10% -8%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103, 243, 255, 0.22), transparent 68%);
  filter: blur(16px);
  pointer-events: none;
}

.download-credit {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 0.7rem 0.9rem;
  border-radius: 16px;
  background: rgba(7, 13, 27, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  color: #eef3ff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ===== CARDS ===== */

.cards-section {
  padding: 56px 0 36px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.card {
  position: relative;
  overflow: hidden;
  min-height: 240px;
  padding: 1.6rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  box-shadow: 0 20px 52px rgba(0, 0, 0, 0.24);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.15);
}

.card-icon,
.card h3,
.card p,
.card-link,
.card-topline {
  position: relative;
  z-index: 1;
}

.card-topline {
  margin-bottom: 0.9rem;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.8rem;
  font-size: 1.55rem;
}

.card p {
  margin: 0;
  color: #c6d1ef;
  line-height: 1.78;
}

.card-link {
  display: inline-block;
  margin-top: 1.15rem;
  font-weight: 700;
}

.card-glow {
  position: absolute;
  width: 230px;
  height: 230px;
  right: -60px;
  top: -50px;
  border-radius: 50%;
  filter: blur(22px);
  opacity: 0.34;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.card:hover .card-glow {
  transform: scale(1.08);
  opacity: 0.56;
}

.card-bio .card-glow {
  background: radial-gradient(circle, rgba(101, 239, 196, 0.95), transparent 65%);
}

.card-physics .card-glow {
  background: radial-gradient(circle, rgba(77, 163, 255, 0.95), transparent 65%);
}

.card-chemistry .card-glow {
  background: radial-gradient(circle, rgba(255, 196, 87, 0.95), transparent 65%);
}

.card-universe .card-glow {
  background: radial-gradient(circle, rgba(147, 129, 255, 0.95), transparent 65%);
}

.card-bio:hover {
  box-shadow: 0 0 26px rgba(101, 239, 196, 0.16), 0 20px 52px rgba(0, 0, 0, 0.24);
}

.card-physics:hover {
  box-shadow: 0 0 26px rgba(77, 163, 255, 0.18), 0 20px 52px rgba(0, 0, 0, 0.24);
}

.card-chemistry:hover {
  box-shadow: 0 0 26px rgba(255, 196, 87, 0.18), 0 20px 52px rgba(0, 0, 0, 0.24);
}

.card-universe:hover {
  box-shadow: 0 0 26px rgba(147, 129, 255, 0.18), 0 20px 52px rgba(0, 0, 0, 0.24);
}

/* ===== FEATURED ===== */

.featured-section {
  padding: 70px 0 42px;
}

.video-shell {
  margin-bottom: 2rem;
}

.hero-video-frame {
  position: relative;
}

.media-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 3;
}

.video-container {
  max-width: 940px;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 0 52px rgba(77, 163, 255, 0.22);
}

.video-container iframe {
  display: block;
  width: 100%;
  height: 520px;
  border: none;
}

.video-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin: 2rem 0 2.5rem;
}

.video-card {
  position: relative;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.34s ease, box-shadow 0.34s ease, border-color 0.34s ease, background 0.34s ease;
  transform-origin: center;
}

.video-card:hover {
  transform: translateY(-10px) scale(1.025);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 0 30px rgba(77, 163, 255, 0.18), 0 24px 60px rgba(0, 0, 0, 0.28);
}

.video-card-frame {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #050816;
}

.video-card-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.00) 35%, rgba(0,0,0,0.55) 100%);
  opacity: 0.65;
  z-index: 2;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.video-card-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(103,243,255,0.14), transparent 60%);
  opacity: 0;
  z-index: 2;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.video-card:hover .video-card-frame::before {
  opacity: 0.4;
}

.video-card:hover .video-card-frame::after {
  opacity: 1;
}

.video-card-frame iframe {
  display: block;
  width: 100%;
  height: 220px;
  border: none;
  transform: scale(1);
  transition: transform 0.45s ease, filter 0.45s ease;
}

.video-card:hover .video-card-frame iframe {
  transform: scale(1.04);
  filter: saturate(1.08) brightness(1.03);
}

.video-overlay {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  z-index: 3;
  pointer-events: none;
  transform: translateY(6px);
  opacity: 0.88;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.video-card:hover .video-overlay {
  transform: translateY(0);
  opacity: 1;
}

.video-tag {
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 26, 0.5);
  color: #eef3ff;
  box-shadow: 0 0 16px rgba(103, 243, 255, 0.12);
}

.video-card h3 {
  margin: 1rem 0 0.6rem;
  font-size: 1.15rem;
}

.video-card p {
  margin: 0;
  color: #c6d1ef;
  line-height: 1.7;
}

/* ===== ULTIMO CAPITULO ===== */

.chapter-section {
  padding: 68px 0 42px;
}

.chapter-shell {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 24px;
  align-items: center;
  padding: 1.2rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 18% 18%, rgba(103,243,255,0.08), transparent 28%),
    radial-gradient(circle at 82% 82%, rgba(147,129,255,0.10), transparent 32%),
    linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255,255,255,0.04);
}

.chapter-media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.08);
  background: #050816;
  min-height: 100%;
}

.chapter-media img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.45s ease;
}

.chapter-media:hover img {
  transform: scale(1.04);
  filter: brightness(1.04) saturate(1.08);
}

.chapter-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.06), rgba(0,0,0,0.44)),
    radial-gradient(circle at center, rgba(103,243,255,0.08), transparent 58%);
  pointer-events: none;
}

.chapter-play {
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(8,17,39,0.76);
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(10px);
  color: #eef3ff;
  font-size: 1.1rem;
  font-weight: 800;
  box-shadow: 0 0 20px rgba(103,243,255,0.16);
}

.chapter-badge {
  position: absolute;
  left: 18px;
  top: 18px;
  z-index: 2;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(7,13,27,0.58);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  color: #eef3ff;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.chapter-content {
  padding: 0.4rem 0.3rem;
}

.chapter-content h3 {
  margin: 1rem 0 0.9rem;
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.08;
}

.chapter-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  font-size: 1rem;
  max-width: 620px;
}

.chapter-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.3rem;
}

.chapter-points span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: #dce7ff;
  font-size: 0.82rem;
  font-weight: 600;
}

.chapter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

/* ===== LITE YOUTUBE EMBEDS ===== */

.video-lite {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: none;
  background: #050816;
}

.video-lite--short {
  aspect-ratio: 9 / 16;
  min-height: 420px;
}

.video-lite-thumb,
.video-lite-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.video-lite-thumb {
  object-fit: cover;
  object-position: center;
  transition: transform 0.45s ease, filter 0.45s ease;
}

.video-lite:hover .video-lite-thumb {
  transform: scale(1.04);
  filter: brightness(1.04) saturate(1.08);
}

.video-lite::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(103,243,255,0.10), transparent 55%),
    linear-gradient(180deg, rgba(0,0,0,0.10), rgba(0,0,0,0.45));
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.video-lite:hover::after {
  opacity: 0.9;
}

.video-lite-button {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  cursor: pointer;
}

.video-lite-play {
  width: 78px;
  height: 78px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(7, 13, 27, 0.72);
  border: 1px solid rgba(255,255,255,0.16);
  backdrop-filter: blur(14px);
  box-shadow:
    0 0 24px rgba(103,243,255,0.16),
    0 12px 30px rgba(0,0,0,0.24);
  transition: transform 0.28s ease, background 0.28s ease, box-shadow 0.28s ease;
}

.video-lite-button:hover .video-lite-play {
  transform: scale(1.06);
  background: rgba(9, 18, 36, 0.84);
  box-shadow:
    0 0 30px rgba(103,243,255,0.22),
    0 16px 34px rgba(0,0,0,0.28);
}

.video-lite-play::before {
  content: "";
  margin-left: 4px;
  width: 0;
  height: 0;
  border-left: 18px solid #eef3ff;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
}

.video-lite-label {
  position: absolute;
  left: 14px;
  top: 14px;
  z-index: 3;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: rgba(7, 13, 27, 0.58);
  border: 1px solid rgba(255,255,255,0.09);
  backdrop-filter: blur(10px);
  color: #eef3ff;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.video-lite-iframe {
  border: none;
}

.short-card:hover .short-frame .video-lite-thumb {
  transform: scale(1.04);
  filter: brightness(1.04) saturate(1.08);
}

/* ===== LATEST ===== */

.latest-section {
  padding: 64px 0 42px;
}

.latest-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.latest-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.6rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.latest-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 28px rgba(103, 243, 255, 0.12), 0 24px 60px rgba(0, 0, 0, 0.24);
}

.latest-card h3 {
  margin: 0.95rem 0 0.8rem;
  font-size: 1.5rem;
}

.latest-card p {
  margin: 0;
  color: #c6d1ef;
  line-height: 1.8;
}

.latest-card-wide {
  min-height: 240px;
}

.latest-actions {
  margin-top: 1.3rem;
}

.latest-thumb {
  position: relative;
  display: block;
  margin-bottom: 1rem;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #050816;
}

.latest-thumb img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.45s ease;
}

.latest-card:hover .latest-thumb img {
  transform: scale(1.04);
  filter: brightness(1.04) saturate(1.08);
}

.latest-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.4));
  pointer-events: none;
}

.latest-play {
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(8, 17, 39, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #eef3ff;
  font-size: 1rem;
  font-weight: 800;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 18px rgba(103, 243, 255, 0.16);
}

/* ===== SHORTS ===== */

.shorts-section {
  padding: 64px 0 50px;
}

.shorts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 2rem;
}

.short-card {
  position: relative;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.34s ease, box-shadow 0.34s ease, border-color 0.34s ease;
}

.short-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 26px rgba(147, 129, 255, 0.16), 0 20px 54px rgba(0, 0, 0, 0.25);
}

.short-frame {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #050816;
}

.short-card h3 {
  margin: 1rem 0 0.55rem;
  font-size: 1.12rem;
}

.short-card p {
  margin: 0;
  color: #c6d1ef;
  line-height: 1.7;
}

/* ===== CREATOR ===== */

.creator-section {
  padding: 56px 0 86px;
}

.creator-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 2rem;
}

.creator-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow);
  text-align: left;
  height: 100%;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.creator-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 28px rgba(147, 129, 255, 0.12), 0 24px 60px rgba(0, 0, 0, 0.24);
}

.creator-card h3 {
  margin: 0.9rem 0 1rem;
  font-size: 1.3rem;
}

.creator-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
}

.creator-manifesto {
  margin: 1.5rem auto 0;
  max-width: 980px;
  text-align: center;
  padding: 1.3rem 1.5rem;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.025));
  box-shadow: var(--shadow-soft);
}

.creator-manifesto p {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: #f4f7ff;
  letter-spacing: 0.02em;
  line-height: 1.7;
}

/* ===== FOOTER ===== */

.footer {
  padding: 60px 0 26px;
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.015));
  backdrop-filter: blur(10px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
  gap: 24px;
  align-items: start;
  padding: 1.8rem 0 1.2rem;
}

.footer-branding h3 {
  margin: 0 0 0.6rem;
  font-family: "Orbitron", sans-serif;
  font-size: 1.15rem;
}

.footer-branding p,
.footer-column p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-title {
  display: inline-block;
  margin-bottom: 0.3rem;
  color: #f4f7ff;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-column a {
  color: #9fb7ff;
  transition: color 0.25s ease, transform 0.25s ease;
}

.footer-column a:hover {
  color: var(--cyan);
  transform: translateX(4px);
}

.footer-quote {
  font-style: italic;
}

.footer-bottom {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  color: #8ea0cb;
  font-size: 0.9rem;
}

/* ===== TO TOP ===== */

#toTop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--blue), var(--violet));
  color: #0a111f;
  font-size: 1.25rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 0 22px rgba(77, 163, 255, 0.32);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: transform 0.25s ease, filter 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
}

#toTop:hover {
  transform: scale(1.08);
  filter: brightness(1.05);
}

#toTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ===== REVEAL ===== */

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== PARTICLES ===== */

#particles {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

/* ===== FOCUS ===== */

a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(103, 243, 255, 0.75);
  outline-offset: 3px;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 1024px) {
  .hero-layout,
  .pdf-shell,
  .download-shell,
  .chapter-shell {
    grid-template-columns: 1fr;
  }

  .quick-ui-grid {
    grid-template-columns: 1fr;
  }

  .download-frame {
    max-width: 100%;
    margin-left: 0;
  }
}

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

  .video-gallery,
  .latest-grid,
  .creator-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 104px;
  }

  .container {
    width: min(100% - 1.2rem, 100%);
  }

  .nav {
    min-height: 86px;
    padding: 0.75rem 0;
  }

  .brand-premium {
    padding: 0.6rem 0.8rem 0.6rem 0.72rem;
  }

  .brand-subtitle {
    display: none;
  }

  .brand-title {
    font-size: 0.92rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.45rem;
    padding: 0.8rem;
    border-radius: 24px;
    background: rgba(7, 13, 27, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.28s ease, transform 0.28s ease, visibility 0.28s ease;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links a,
  .nav-links .nav-cta {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding: 18px 0 18px;
  }

  .hero-layout {
    gap: 1.4rem;
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .hero-copy {
    padding: 1.25rem;
    border-radius: 24px;
  }

  .hero h1 {
    font-size: clamp(2.5rem, 12vw, 3.6rem);
    line-height: 0.95;
  }

  .hero-text {
    font-size: 0.98rem;
    line-height: 1.75;
  }

  .hero-manifesto {
    margin-top: 1.1rem;
    padding: 0.9rem;
    gap: 0.75rem;
  }

  .hero-manifesto p {
    font-size: 0.92rem;
    line-height: 1.65;
  }

  .hero-actions {
    flex-direction: column;
    gap: 0.8rem;
  }

  .btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 250px;
  }

  .hero-aura {
    width: 280px;
    height: 280px;
    filter: blur(20px);
  }

  .planet-core {
    width: 120px;
    height: 120px;
  }

  .orbit-1 { width: 170px; height: 170px; }
  .orbit-2 { width: 220px; height: 220px; }
  .orbit-3 { width: 280px; height: 280px; }
  .orbit-4 { width: 330px; height: 330px; }

  .section-heading {
    margin-bottom: 1.5rem;
  }

  .section-heading h2 {
    font-size: 1.8rem;
  }

  .section-heading p {
    font-size: 0.96rem;
    line-height: 1.7;
  }

  .pdf-section,
  .download-section,
  .cards-section,
  .featured-section,
  .chapter-section,
  .latest-section,
  .shorts-section,
  .creator-section {
    padding-top: 42px;
    padding-bottom: 24px;
  }

  .cards,
  .shorts-grid {
    grid-template-columns: 1fr;
  }

  .quick-ui-card {
    min-height: auto;
    padding: 1.1rem;
  }

  .pdf-shell,
  .download-shell,
  .chapter-shell {
    padding: 1rem;
    border-radius: 24px;
    gap: 1rem;
  }

  .pdf-cover {
    min-height: 360px;
    padding: 1rem;
  }

  .pdf-cover-art {
    min-height: 180px;
    margin-top: 1rem;
    margin-bottom: 1rem;
  }

  .pdf-cover-art img {
    width: min(100%, 260px);
    max-height: 220px;
  }

  .pdf-cover-content {
    min-height: auto;
  }

  .pdf-cover h3 {
    font-size: 1.85rem;
  }

  .pdf-content h3,
  .download-copy h2,
  .chapter-content h3 {
    font-size: 1.85rem;
  }

  .pdf-content p,
  .download-copy p,
  .chapter-content p {
    font-size: 0.96rem;
    line-height: 1.75;
  }

  .pdf-actions,
  .download-actions,
  .chapter-actions {
    flex-direction: column;
  }

  .pdf-actions .btn,
  .download-actions .btn,
  .chapter-actions .btn {
    width: 100%;
  }

  .download-frame {
    aspect-ratio: 16 / 8.4;
    max-width: 100%;
    min-height: 0;
  }

  .download-frame img {
    object-position: center;
  }

  .download-credit {
    left: 12px;
    right: 12px;
    bottom: 12px;
    font-size: 0.72rem;
    padding: 0.55rem 0.7rem;
  }

  .chapter-media img {
    min-height: 240px;
  }

  .chapter-play {
    width: 50px;
    height: 50px;
    font-size: 1rem;
  }

  .card,
  .video-card,
  .short-card,
  .creator-card,
  .latest-card {
    border-radius: 20px;
  }

  .card {
    min-height: auto;
    padding: 1.25rem;
  }

  .card h3 {
    font-size: 1.35rem;
  }

  .card p,
  .video-card p,
  .short-card p,
  .creator-card p,
  .latest-card p {
    font-size: 0.95rem;
  }

  .video-container iframe {
    height: 220px;
  }

  .video-card-frame iframe {
    height: 210px;
  }

  .video-lite-play {
    width: 64px;
    height: 64px;
  }

  .video-lite-play::before {
    border-left-width: 16px;
    border-top-width: 10px;
    border-bottom-width: 10px;
  }

  .video-lite--short {
    min-height: 360px;
  }

  .short-card h3,
  .video-card h3,
  .creator-card h3,
  .latest-card h3 {
    font-size: 1.05rem;
  }

  .creator-card,
  .latest-card {
    padding: 1.4rem;
  }

  .creator-manifesto {
    padding: 1.1rem 1rem;
  }

  .creator-manifesto p {
    font-size: 1rem;
    line-height: 1.6;
  }

  .latest-thumb img {
    height: 200px;
  }

  .latest-play {
    width: 42px;
    height: 42px;
    font-size: 0.95rem;
  }

  .footer {
    padding: 40px 0 24px;
  }

  .footer-grid {
    text-align: center;
  }

  .footer-column {
    align-items: center;
  }

  .footer-branding h3 {
    font-size: 1rem;
  }

  .footer-branding p,
  .footer-quote,
  .footer-bottom {
    font-size: 0.92rem;
  }

  .footer-column a:hover {
    transform: none;
  }

  #toTop {
    width: 42px;
    height: 42px;
    right: 18px;
    bottom: 18px;
    font-size: 1.05rem;
  }
}

@media (max-width: 520px) {
  body {
    padding-top: 110px;
  }

  .download-shell {
    padding: 1rem;
  }

  .pdf-points,
  .download-meta,
  .chapter-points {
    gap: 0.5rem;
  }

  .pdf-points span,
  .download-meta span,
  .chapter-points span {
    font-size: 0.74rem;
    min-height: 34px;
    padding: 0.5rem 0.75rem;
  }

  .download-frame {
    aspect-ratio: 16 / 7.8;
  }

  .download-credit {
    font-size: 0.68rem;
  }

  .video-container iframe {
    height: 205px;
  }

  .video-card-frame iframe {
    height: 190px;
  }

  .video-lite--short {
    min-height: 320px;
  }

  .video-lite-label {
    font-size: 0.68rem;
    padding: 0.42rem 0.68rem;
  }

  .chapter-media img {
    min-height: 210px;
  }

  .latest-thumb img {
    height: 185px;
  }
}

@media (max-width: 420px) {
  body {
    padding-top: 116px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-copy {
    padding: 1.1rem;
  }

  .hero-text,
  .section-heading p,
  .creator-card p,
  .latest-card p,
  .pdf-content p,
  .download-copy p,
  .chapter-content p {
    font-size: 0.93rem;
  }

  .planet-core {
    width: 105px;
    height: 105px;
  }

  .orbit-1 { width: 150px; height: 150px; }
  .orbit-2 { width: 195px; height: 195px; }
  .orbit-3 { width: 245px; height: 245px; }
  .orbit-4 { width: 285px; height: 285px; }

  .pdf-content h3,
  .download-copy h2,
  .chapter-content h3 {
    font-size: 1.65rem;
  }

  .download-frame {
    aspect-ratio: 16 / 7.2;
  }

  .hero-manifesto p {
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}