/* ==========================================================================
   BUMAI — homepage
   ========================================================================== */

.hero {
  position: relative;
  width: 100%;
  min-height: 100svh;
  min-height: 100vh;
  margin-top: clamp(-6.5rem, -9vw, -5rem);
  padding-top: clamp(6.5rem, 9vw, 5rem);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
  box-sizing: border-box;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: url("/images/night.jpg");
  background-size: cover;
  background-position: center;
  animation: heroKenBurns 26s ease-in-out infinite alternate;
}

html[data-sky="day"] .hero__media {
  background-image: url("/images/day.jpg");
}

.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    180deg,
    rgba(6, 10, 14, 0.32) 0%,
    rgba(6, 10, 14, 0.58) 55%,
    rgba(6, 10, 14, 0.92) 100%
  );
}

@keyframes heroKenBurns {
  from { transform: scale(1); }
  to { transform: scale(1.09); }
}

.hero__inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad-page);
  padding-block: clamp(7rem, 16vw, 11rem) clamp(5rem, 10vw, 7rem);
  text-align: center;
}

.hero__eyebrow {
  color: rgba(255, 255, 255, 0.82);
  justify-content: center;
  animation: heroFade 900ms var(--ease) both;
}

.hero__title {
  font-size: clamp(4rem, 7vw + 2rem, 12.5rem);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(
    110deg,
    #fff 20%,
    var(--c-aurora) 42%,
    var(--c-secondary) 54%,
    #fff 80%
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: heroShimmer 7s linear infinite, heroRise 1000ms var(--ease) both;
}

@keyframes heroShimmer {
  0% { background-position: 0% 0; }
  100% { background-position: -300% 0; }
}

@keyframes heroRise {
  from { opacity: 0; transform: translateY(1.2rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes heroFade {
  from { opacity: 0; transform: translateY(0.8rem); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__dek {
  max-width: 34rem;
  margin: 0 auto 2.2rem;
  font-size: clamp(1.1rem, 1vw + 0.9rem, 1.5rem);
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.6;
  animation: heroFade 900ms var(--ease) 150ms both;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
  animation: heroFade 900ms var(--ease) 300ms both;
}

.hero__scrollcue {
  position: absolute;
  right: clamp(1.25rem, 4vw, 3rem);
  bottom: clamp(1.25rem, 4vw, 2.75rem);
  width: 92px;
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  animation: heroFade 900ms var(--ease) 450ms both;
}

.hero__scrollcue-ring {
  width: 100%;
  height: 100%;
  animation: heroScrollSpin 16s linear infinite;
}

.hero__scrollcue-ring text {
  font-size: 8px;
  letter-spacing: 2px;
  fill: rgba(255, 255, 255, 0.78);
  text-transform: uppercase;
  font-family: var(--font-base);
}

.hero__scrollcue-arrow {
  position: absolute;
  font-size: 1.3rem;
  color: #fff;
  animation: heroScrollBounce 1.8s var(--ease) infinite;
}

@keyframes heroScrollSpin {
  to { transform: rotate(360deg); }
}

@keyframes heroScrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50% { transform: translateY(6px); opacity: 1; }
}

@media (max-width: 640px) {
  .hero__scrollcue { display: none; }
}

/* -- Statement band -- */

.statement {
  padding: var(--gap-section) 0;
}

.statement__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad-page);
}

.statement__lines {
  font-size: clamp(2.2rem, 3.6vw + 1rem, 5.5rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.statement__lines .muted { color: var(--c-text-soft); }
.statement__lines .accent { color: var(--c-primary); }

.statement__foot {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-end;
}

.statement__foot p {
  max-width: 26rem;
  color: var(--c-text-soft);
  line-height: 1.6;
}

/* -- Practice grid -- */

.practice {
  padding: var(--gap-section) 0;
  background: var(--c-grey);
  border-radius: var(--radius-lg);
}

.practice__head {
  max-width: var(--container);
  margin: 0 auto clamp(2rem, 4vw, 3.5rem);
  padding-inline: var(--pad-page);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
}

.practice__head p {
  max-width: 26rem;
  color: var(--c-text-soft);
  line-height: 1.6;
}

.practice__list {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad-page);
  list-style: none;
}

.practice__item {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: clamp(1.4rem, 2.4vw, 2rem) 0;
  border-bottom: 1px solid var(--c-line);
}

.practice__item:first-child { border-top: 1px solid var(--c-line); }

.practice__num {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text-soft);
}

.practice__body h3 {
  font-size: clamp(1.4rem, 1.6vw + 0.8rem, 2.1rem);
  margin-bottom: 0.5rem;
}

.practice__body p {
  color: var(--c-text-soft);
  max-width: 40rem;
  line-height: 1.6;
}

/* -- Latest experiments grid -- */

.experiments {
  padding: var(--gap-section) 0;
}

.experiments__head {
  max-width: var(--container);
  margin: 0 auto clamp(2rem, 4vw, 3rem);
  padding-inline: var(--pad-page);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
}

.experiments__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad-page);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 2.5vw, 2rem);
}

@media (min-width: 720px) {
  .experiments__grid { grid-template-columns: repeat(3, 1fr); }
}

.x-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--c-bg-dark);
  color: var(--c-text-on-dark);
  transition: transform 260ms var(--ease);
}

.x-card:hover { transform: translateY(-4px); }

.x-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.x-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms var(--ease);
}

.x-card:hover .x-card__media img { transform: scale(1.05); }

.x-card__body {
  padding: clamp(1.3rem, 2vw, 1.75rem);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.x-card__meta {
  font-size: 0.78rem;
  color: var(--c-text-on-dark-soft);
  margin-bottom: 0.7rem;
}

.x-card__title {
  font-size: clamp(1.1rem, 1vw + 0.7rem, 1.4rem);
  font-weight: 700;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.x-card__summary {
  color: var(--c-text-on-dark-soft);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.x-card__arrow {
  margin-top: auto;
  font-weight: 700;
  color: var(--c-aurora);
}

.experiments__empty {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad-page);
  color: var(--c-text-soft);
}

/* -- CTA band -- */

.cta-band {
  margin: var(--gap-section) auto 0;
  max-width: var(--container);
  padding: 0 var(--pad-page);
}

.cta-band__inner {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--c-primary);
  color: var(--c-text-on-dark);
  padding: clamp(3rem, 7vw, 6rem) clamp(1.5rem, 5vw, 4rem);
  text-align: center;
  overflow: hidden;
}

.cta-band__inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/images/hero-satellite.jpg") center / cover no-repeat;
  opacity: 0.18;
  z-index: 0;
}

.cta-band__content { position: relative; z-index: 1; }

.cta-band h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  margin-bottom: 1rem;
}

.cta-band p {
  color: var(--c-text-on-dark-soft);
  max-width: 30rem;
  margin: 0 auto 1.75rem;
  line-height: 1.6;
}

.cta-band__email {
  display: inline-flex;
  align-items: center;
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.cta-band__email:hover {
  transform: translateY(-2px);
  opacity: 0.85;
}

.cta-band__email img {
  height: clamp(2.2rem, 4vw, 3.4rem);
  width: auto;
  filter: invert(1) brightness(1.4);
}

@media (max-width: 520px) {
  .hero { padding-top: clamp(5rem, 20vw, 7rem); }
}