:root {
  color-scheme: dark;
  --bg: #05080d;
  --bg-2: #081119;
  --panel: rgba(8, 18, 28, 0.82);
  --panel-strong: rgba(10, 24, 36, 0.94);
  --line: rgba(142, 224, 255, 0.22);
  --line-strong: rgba(142, 224, 255, 0.42);
  --text: #f3f7fb;
  --muted: #9fb1c2;
  --soft: #d6e5ef;
  --cyan: #35d9ff;
  --green: #54f2b6;
  --amber: #ffc857;
  --blue: #66a6ff;
  --violet: #a892ff;
  --danger: #ff6f91;
  --shadow-cyan: 0 0 32px rgba(53, 217, 255, 0.22);
  --shadow-green: 0 0 28px rgba(84, 242, 182, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(53, 217, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 217, 255, 0.06) 1px, transparent 1px),
    linear-gradient(180deg, rgba(8, 30, 46, 0.62), transparent 38rem),
    linear-gradient(180deg, var(--bg), #071017 44%, #05080d);
  background-size: 42px 42px, 42px 42px, auto, auto;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, transparent, rgba(84, 242, 182, 0.07), transparent),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.025) 0, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 5px);
  opacity: 0.42;
  mix-blend-mode: screen;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

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

.page-shell {
  position: relative;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 58px;
  margin: 14px 0 22px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(4, 10, 16, 0.76);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--soft);
  font-size: 0.96rem;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(84, 242, 182, 0.55);
  border-radius: 8px;
  color: var(--green);
  background: linear-gradient(135deg, rgba(84, 242, 182, 0.16), rgba(53, 217, 255, 0.08));
  box-shadow: var(--shadow-green);
  font-size: 0.74rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  border-color: var(--line);
  background: rgba(53, 217, 255, 0.08);
  outline: none;
}

.hero-section {
  position: relative;
  display: grid;
  justify-items: center;
  padding: 68px 0 34px;
  text-align: center;
}

.hero-section::before,
.hero-section::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 96px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  opacity: 0.55;
}

.hero-section::before {
  top: 0;
}

.hero-section::after {
  bottom: -34px;
}

.hero-core {
  position: relative;
  display: grid;
  place-items: center;
  width: 176px;
  height: 156px;
  margin-bottom: 14px;
}

.core-ring,
.core-ring span {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(53, 217, 255, 0.24);
  border-radius: 50%;
}

.core-ring {
  transform: rotateX(68deg);
  box-shadow: inset 0 0 18px rgba(53, 217, 255, 0.14), 0 0 24px rgba(84, 242, 182, 0.16);
}

.core-ring span:nth-child(1) {
  inset: 18px 7px;
  border-color: rgba(84, 242, 182, 0.3);
}

.core-ring span:nth-child(2) {
  inset: 36px 22px;
  border-color: rgba(255, 200, 87, 0.24);
}

.core-ring span:nth-child(3) {
  inset: 52px 46px;
  border-color: rgba(53, 217, 255, 0.34);
}

.hero-emblem {
  position: relative;
  z-index: 2;
  width: 138px;
  height: auto;
  filter: drop-shadow(0 0 20px rgba(53, 217, 255, 0.22));
}

.eyebrow,
.feature-kicker {
  margin: 0;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 980px;
  margin-bottom: 14px;
  font-size: 4.5rem;
  line-height: 0.98;
  font-weight: 850;
  letter-spacing: 0;
}

.hero-subtitle {
  width: min(880px, 100%);
  margin: 0 auto 28px;
  color: var(--soft);
  font-size: 1.28rem;
  line-height: 1.75;
}

.hero-actions,
.community-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(8, 18, 28, 0.74);
  color: var(--text);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.action-btn:hover,
.action-btn:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(84, 242, 182, 0.72);
  background: rgba(12, 31, 43, 0.92);
  box-shadow: var(--shadow-cyan);
  outline: none;
}

.action-btn.primary {
  border-color: rgba(84, 242, 182, 0.72);
  color: #04110d;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  box-shadow: 0 0 24px rgba(84, 242, 182, 0.22);
  font-weight: 800;
}

.action-btn.muted {
  color: #b8c8d6;
  border-color: rgba(159, 177, 194, 0.24);
}

.btn-icon {
  color: currentColor;
  font-size: 0.75rem;
}

.signal-tags {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.signal-tags span {
  padding: 6px 10px;
  border: 1px solid rgba(53, 217, 255, 0.2);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(53, 217, 255, 0.05);
  font-size: 0.82rem;
}

.hero-preview {
  position: relative;
  margin: 22px auto 90px;
}

.screen-frame {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(142, 224, 255, 0.28);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.52), var(--shadow-cyan);
  cursor: zoom-in;
}

.screen-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.08), transparent 32%, transparent 64%, rgba(53, 217, 255, 0.09));
}

.screen-frame img {
  width: 100%;
  height: auto;
}

.large-screen img {
  border-top: 1px solid rgba(142, 224, 255, 0.16);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 12px;
  border-bottom: 1px solid rgba(142, 224, 255, 0.16);
  background: rgba(4, 12, 18, 0.9);
}

.window-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  opacity: 0.9;
}

.window-bar i:nth-child(2) {
  background: var(--amber);
}

.window-bar i:nth-child(3) {
  background: var(--green);
}

.section-block {
  position: relative;
  margin-bottom: 100px;
  content-visibility: auto;
  contain-intrinsic-size: auto 800px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading.wide-heading {
  max-width: 860px;
}

.section-heading h2,
.strip-copy h2 {
  margin: 8px 0 12px;
  color: var(--text);
  font-size: 2.25rem;
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p,
.strip-copy p {
  color: var(--muted);
  font-size: 1.03rem;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.problem-card {
  position: relative;
  min-height: 208px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(53, 217, 255, 0.1), rgba(84, 242, 182, 0.04)),
    rgba(8, 18, 28, 0.74);
  overflow: hidden;
}

.problem-card::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--green), transparent);
}

.card-index {
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 900;
}

.problem-card h3 {
  margin: 38px 0 12px;
  color: var(--text);
  font-size: 1.24rem;
  line-height: 1.25;
}

.problem-card p {
  margin: 0;
  color: var(--muted);
}

.showcase-stack {
  display: grid;
  gap: 22px;
}

.showcase-item {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.42fr);
  align-items: center;
  gap: 26px;
  min-height: 430px;
  padding: 24px;
  border: 1px solid rgba(142, 224, 255, 0.18);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(11, 26, 38, 0.86), rgba(5, 12, 19, 0.78));
}

.showcase-item.reverse {
  grid-template-columns: minmax(0, 1.42fr) minmax(260px, 0.78fr);
}

.showcase-item.reverse .showcase-copy {
  order: 2;
}

.showcase-item.reverse .screen-frame {
  order: 1;
}

.showcase-copy h3 {
  margin: 8px 0 12px;
  color: var(--text);
  font-size: 1.7rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.showcase-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(142, 224, 255, 0.28);
  border-radius: 8px;
  padding: 8px;
  background:
    linear-gradient(rgba(53, 217, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 217, 255, 0.08) 1px, transparent 1px),
    rgba(4, 10, 16, 0.82);
  background-size: 28px 28px, 28px 28px, auto;
  box-shadow: var(--shadow-green);
}

.video-frame video {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: #000;
  object-fit: contain;
}

.video-showcase {
  border-color: rgba(84, 242, 182, 0.28);
  background:
    linear-gradient(135deg, rgba(84, 242, 182, 0.1), rgba(53, 217, 255, 0.05)),
    rgba(5, 12, 19, 0.86);
}

/* ── Clickable video overlay ── */
.video-clickable {
  cursor: pointer;
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  transition: background 0.2s;
}

.video-clickable:hover .video-play-overlay {
  background: rgba(0, 0, 0, 0.1);
}

.video-play-overlay svg {
  width: 62px;
  height: 62px;
  filter: drop-shadow(0 2px 12px rgba(0,0,0,0.5));
  transition: transform 0.2s;
}

.video-clickable:hover .video-play-overlay svg {
  transform: scale(1.1);
}

/* ── Chapter links ── */
.video-chapter-links {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.video-chapter-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(4, 10, 16, 0.66);
  color: var(--soft);
  font-size: 0.92rem;
  font-weight: 600;
  transition: border-color 0.16s, background 0.16s;
}

.video-chapter-link:hover {
  border-color: rgba(84, 242, 182, 0.5);
  background: rgba(53, 217, 255, 0.08);
  color: var(--text);
}

.video-chapter-link .ch-duration {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 800;
  margin-left: auto;
  white-space: nowrap;
}

/* ── Video modal ── */
.video-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.video-modal-overlay.active {
  display: flex;
}

.video-modal {
  position: relative;
  width: min(92vw, 1200px);
  cursor: default;
}

.video-modal video {
  display: block;
  width: 100%;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 0 60px rgba(53, 217, 255, 0.25), 0 32px 80px rgba(0, 0, 0, 0.6);
}

.video-modal-close {
  position: absolute;
  top: -42px;
  right: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 12px;
  color: var(--muted);
  background: rgba(4, 10, 16, 0.7);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.video-modal-close:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.cognitive-strip {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  align-items: center;
  gap: 30px;
  padding: 28px;
  border: 1px solid rgba(84, 242, 182, 0.24);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(84, 242, 182, 0.09), transparent),
    rgba(7, 16, 24, 0.86);
}

.cognitive-strip img {
  width: 100%;
  border: 1px solid rgba(142, 224, 255, 0.18);
  border-radius: 8px;
}

.community-section {
  padding: 36px;
  border: 1px solid rgba(142, 224, 255, 0.22);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(53, 217, 255, 0.12), rgba(84, 242, 182, 0.06)),
    rgba(5, 12, 19, 0.88);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 34px 0 48px;
  color: var(--muted);
  font-size: 0.9rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(2, 6, 10, 0.82);
  backdrop-filter: blur(14px);
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-card,
.lightbox-card {
  position: relative;
  width: min(420px, 100%);
  max-height: calc(100vh - 44px);
  padding: 24px;
  border: 1px solid rgba(142, 224, 255, 0.35);
  border-radius: 8px;
  background: var(--panel-strong);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.62), var(--shadow-cyan);
  overflow: auto;
}

.modal-card h2 {
  margin: 0 44px 8px 0;
  font-size: 1.4rem;
}

.modal-card p {
  color: var(--muted);
}

.modal-card img {
  width: min(260px, 100%);
  margin: 18px auto 0;
  border-radius: 8px;
}

.lightbox-card {
  width: min(1120px, 100%);
  padding: 14px;
}

.lightbox-card img {
  width: 100%;
  max-height: calc(100vh - 96px);
  object-fit: contain;
  border-radius: 8px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(142, 224, 255, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.modal-close:hover,
.modal-close:focus-visible {
  border-color: var(--green);
  outline: none;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 100;
  max-width: min(360px, calc(100% - 44px));
  padding: 12px 14px;
  border: 1px solid rgba(84, 242, 182, 0.35);
  border-radius: 8px;
  background: rgba(5, 16, 22, 0.96);
  color: var(--soft);
  box-shadow: var(--shadow-green);
}

.toast[hidden] {
  display: none;
}

@media (max-width: 980px) {
  .page-shell {
    width: min(100% - 28px, 760px);
  }

  h1 {
    font-size: 3.3rem;
  }

  .hero-subtitle {
    font-size: 1.12rem;
  }

  .problem-grid,
  .cognitive-strip,
  .showcase-item,
  .showcase-item.reverse {
    grid-template-columns: 1fr;
  }

  .showcase-item.reverse .showcase-copy,
  .showcase-item.reverse .screen-frame {
    order: initial;
  }

  .showcase-item {
    min-height: auto;
  }

}

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .page-shell {
    width: min(100% - 20px, 520px);
  }

  .site-header {
    position: relative;
    top: auto;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-section {
    padding-top: 34px;
  }

  .hero-core {
    width: 142px;
    height: 126px;
  }

  .hero-emblem {
    width: 112px;
  }

  h1 {
    font-size: 2.55rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    line-height: 1.68;
  }

  .action-btn {
    width: 100%;
  }

  .hero-preview {
    margin-bottom: 64px;
  }

  .section-block {
    margin-bottom: 68px;
  }

  .section-heading h2,
  .strip-copy h2 {
    font-size: 1.72rem;
  }

  .showcase-item,
  .community-section,
  .cognitive-strip {
    padding: 18px;
  }

  .showcase-copy h3 {
    font-size: 1.34rem;
  }
}