:root {
  --bg: #050815;
  --panel: rgba(16, 22, 43, 0.82);
  --panel-strong: rgba(20, 28, 56, 0.94);
  --text: #f6f8ff;
  --muted: #c5ccec;
  --cyan: #68e7ff;
  --mint: #8df5d1;
  --pink: #ff77bd;
  --gold: #ffd36c;
  --line: rgba(255, 255, 255, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 15%, rgba(104, 231, 255, 0.22), transparent 24rem),
    radial-gradient(circle at 84% 8%, rgba(255, 119, 189, 0.2), transparent 22rem),
    linear-gradient(150deg, #050815, #101735 58%, #071526);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(104, 231, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(104, 231, 255, 0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 78%);
}

.site-header,
main,
footer {
  position: relative;
  z-index: 1;
}

.site-header {
  width: min(1180px, calc(100% - 2rem));
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 auto;
}

.brand,
nav a,
.text-link {
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

nav a {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

main {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.4rem 0 3rem;
}

.hero {
  min-height: auto;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.82fr);
  align-items: center;
  gap: 2.25rem;
  padding: 1rem 0 0.75rem;
}

.hero-copy {
  max-width: 35rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--mint);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0.9rem;
  font-size: clamp(2.45rem, 6vw, 5.15rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0.7rem;
  font-size: clamp(1.55rem, 3vw, 2.6rem);
  line-height: 1.05;
  letter-spacing: 0;
}

p {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button,
.btn,
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  border-radius: 0.5rem;
}

.button,
.btn {
  justify-content: center;
  padding: 0.72rem 1rem;
  color: #06101c;
  background: var(--mint);
  font-weight: 900;
  text-decoration: none;
}

.button.primary,
.btn:hover {
  background: var(--gold);
}

.hero-visual,
.hologram-section img {
  overflow: hidden;
  border: 1px solid rgba(104, 231, 255, 0.24);
  border-radius: 0.5rem;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}

.hero-visual {
  width: min(100%, 520px);
  max-height: 520px;
  aspect-ratio: 4 / 5;
  justify-self: end;
}

.hero-visual img,
.hologram-section img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.experience-card,
.hologram-section {
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  backdrop-filter: blur(14px);
}

.experience-card {
  color: inherit;
  padding: 1.25rem;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.experience-card:hover,
.experience-card:focus-visible {
  border-color: rgba(141, 245, 209, 0.72);
  transform: translateY(-2px);
  outline: none;
}

.feature-card {
  background:
    linear-gradient(135deg, rgba(104, 231, 255, 0.14), rgba(255, 119, 189, 0.1)),
    var(--panel-strong);
}

.card-number {
  display: block;
  margin-bottom: 1.8rem;
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 900;
}

.text-link {
  color: var(--mint);
  border-bottom: 1px solid currentColor;
  border-radius: 0;
}

.hologram-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1fr);
  align-items: center;
  gap: 1.4rem;
  margin-top: 1rem;
  padding: 1.25rem;
}

.hologram-section img {
  aspect-ratio: 1 / 1;
}

footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

footer p {
  margin: 0;
  color: #9aa7cf;
  font-size: 0.95rem;
}

/* AI Concept of the Day */
.concept-section {
  margin: 1.6rem 0;
}

.concept-head {
  max-width: 46rem;
  margin-bottom: 1rem;
}

.concept-head h2 {
  margin: 0.3rem 0 0.5rem;
}

.concept-head p {
  margin: 0;
  color: var(--muted);
}

.concept-card {
  border: 1px solid rgba(141, 245, 209, 0.4);
  border-radius: 0.5rem;
  background:
    linear-gradient(135deg, rgba(104, 231, 255, 0.14), rgba(255, 119, 189, 0.1)),
    var(--panel-strong);
  backdrop-filter: blur(14px);
  padding: 1.4rem 1.5rem;
}

.concept-date {
  margin: 0 0 0.4rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.concept-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  line-height: 1.2;
}

.concept-summary {
  margin: 0 0 0.9rem;
  color: var(--mint);
  font-size: 1.05rem;
}

.concept-body p {
  margin: 0 0 0.7rem;
  color: var(--muted);
  line-height: 1.6;
}

.concept-example {
  margin: 0.9rem 0 0;
  padding: 0.7rem 0.9rem;
  border-left: 2px solid var(--gold);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 0 0.35rem 0.35rem 0;
  color: var(--text);
}

.concept-example span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.concept-source,
.concept-loading {
  margin: 1rem 0 0;
  color: #9aa7cf;
  font-size: 0.85rem;
}

.concept-loading {
  margin: 0;
}

.concept-archive {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  padding: 0.6rem 1rem;
}

.concept-archive summary {
  cursor: pointer;
  color: var(--mint);
  font-weight: 700;
}

.concept-list {
  list-style: none;
  margin: 0.8rem 0 0.3rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.concept-list li {
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.concept-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.concept-list-date {
  display: block;
  color: var(--cyan);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.concept-list-title {
  font-weight: 700;
}

.concept-list-summary {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .hero,
  .experience-grid,
  .hologram-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 1.4rem 0;
  }

  .hero-visual {
    width: 100%;
    max-height: none;
    justify-self: stretch;
  }
}