:root {
  --card-radius: 2px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: #070b14;
  font-family: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  color: #e8edf5;
}

img { display: block; }

::selection { background: #1a6fc4; color: #ffffff; }

a { text-decoration: none; }

/* Scroll reveal */
.rv {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.rv.in { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.08s; }
.d2 { transition-delay: 0.16s; }
.d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; }
.d5 { transition-delay: 0.40s; }

/* ── Layout shell ── */
.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #070b14;
}

/* ── Header ── */
.site-header {
  border-bottom: 1px solid #00265a;
}
.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-header__logo img {
  height: 40px;
  width: auto;
}
.site-header__event {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}
.site-header__event img {
  height: 40px;
  width: auto;
}
/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse 90% 60% at 50% -10%, rgba(38, 108, 196, 0.35), rgba(7, 11, 20, 0) 70%), #070b14;
  /* min-height: 95vh; */
  display: flex;
  /* align-items: flex-end; */
  overflow: hidden;
}
.hero-bg-img {
  width: 100%;
}
.hero-bg-img picture {
  display: flex;
  width: 100%;
}
.hero-bg-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  animation: kv-in 1s ease both;
}
@keyframes kv-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 220, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 65%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 65%);
}
.hero__inner {
  position: relative;
  /* max-width: 1100px; */
  width: 100%;
  margin: 0 auto;
  padding: 0px 0 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero__titles {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: center;
  margin-top: -40px;
  padding: 0 24px;
}
.hero__h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.06;
  font-weight: 700;
  letter-spacing: .1vw;
  max-width: 16ch;
  text-wrap: balance;
  color: #ffffff;
  background: linear-gradient(90deg, #f4faff, #a1ecff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__tagline {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  letter-spacing: 0.1em;
  /* text-transform: uppercase; */
  background: linear-gradient(90deg, #f4faff, #a1ecff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ── Invitation ── */
.invitation {
  background: #070b14;
  border-top: 1px solid rgba(126, 147, 175, 0.12);
}
.invitation__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 24px;
  display: grid;
  grid-template-columns: minmax(260px, 5fr) minmax(320px, 7fr);
  gap: 56px;
}
.invitation__left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.invitation__rule {
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, #4fa3f0, #3fd0f5);
  border: none;
  margin: 0;
}
.invitation__quote {
  margin: 0;
  font-size: 30px;
  line-height: 1.42;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #ffffff;
  text-wrap: balance;
}
.invitation__right {
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding-top: 6px;
}
.invitation__body {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: #9aabc2;
}
.invitation__body strong {
  color: #dbe6f3;
  font-weight: 600;
}

/* ── Application Areas ── */
.app-areas {
  background: #0a101e;
  border-top: 1px solid rgba(126, 147, 175, 0.12);
}
.app-areas__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 24px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}
.app-areas__heading {
  margin: 0 auto;
  max-width: 800px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: #ffffff;
  text-align: center;
  text-wrap: balance;
}
.app-areas__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 22px;
}
.app-card {
  position: relative;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(126, 147, 175, 0.18);
  border-radius: var(--card-radius);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.app-card:hover {
  border-color: rgba(79, 163, 240, 0.55);
  background: rgba(38, 108, 196, 0.07);
  box-shadow: 0 0 32px rgba(79, 163, 240, 0.08);
}
.app-card__num-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.app-card__num {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #3fd0f5;
}
.app-card__divider {
  height: 1px;
  flex: 1;
  background: rgba(126, 147, 175, 0.2);
}
.app-card__title {
  margin: 0;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #cef0fe;
  /* text glow */
  text-shadow: 0 0 18px rgba(167, 234, 255, 0.932);
}
.app-card__products {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  color: #8fc1ec;
}
.app-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #7e93af;
}

/* ── Event Info ── */
.event-info {
  background: #070b14;
  border-top: 1px solid rgba(126, 147, 175, 0.12);
}
.event-info__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 24px;
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.event-info__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: rgba(126, 147, 175, 0.18);
  border: 1px solid rgba(126, 147, 175, 0.18);
  border-radius: var(--card-radius);
  overflow: hidden;
}
.stat-cell {
  background: #0a101e;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.stat-cell__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #7e93af;
}
.stat-cell__value {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
}
.stat-cell__value--accent {
  color: #3fd0f5;
}
.stat-cell__sub {
  font-size: 15px;
  color: #9aabc2;
}
.stat-cell__address {
  font-size: 14px;
  line-height: 1.5;
  color: #9aabc2;
}
.stat-cell__location {
  font-size: 20px;
  line-height: 1.3;
  font-weight: 700;
  color: #ffffff;
  text-wrap: balance;
}
.keynote-banner {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 28px 40px;
  padding: 40px 40px 36px;
  border: 1px solid rgba(63, 208, 245, 0.25);
  border-radius: var(--card-radius);
  background:
    linear-gradient(135deg, rgba(38, 108, 196, 0.18) 0%, rgba(63, 208, 245, 0.05) 100%);
  position: relative;
  overflow: hidden;
}
.keynote-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 100% 0%, rgba(63, 208, 245, 0.08), transparent 60%);
  pointer-events: none;
}
.keynote-banner__left {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-self: center;
}
.keynote-banner__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #3fd0f5;
}
.keynote-banner__title {
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
}
.keynote-banner__right {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 15px;
  color: #cdd9e8;
  align-self: center;
  text-align: right;
}
.keynote-banner__time {
  font-weight: 700;
  font-size: 16px;
  color: #ffffff;
}
.keynote-banner__speakers {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(63, 208, 245, 0.12);
}
.keynote-speaker {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex: 1;
  min-width: 260px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(63, 208, 245, 0.12);
  border-radius: var(--card-radius);
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, background 0.25s;
  background: linear-gradient(-160deg, transparent 55%, rgba(0, 251, 255, 0.22) 90%);
}
.keynote-speaker::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(63, 208, 245, 0.4), transparent);
}
.keynote-speaker__photo-wrap {
  position: relative;
  flex-shrink: 0;
}
.keynote-speaker__photo-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 2px;
  z-index: 2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 160, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 220, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
}
.keynote-speaker__photo-wrap::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: var(--card-radius);
  z-index: 0;
}
.keynote-speaker__photo {
  position: relative;
  z-index: 1;
  width: 196px;
  height: 196px;
  border-radius: 2px;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.keynote-speaker__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 1rem;
}
.keynote-speaker__name {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}
.keynote-speaker__title {
  font-size: 13px;
  color: #7eb3d8;
  line-height: 1.45;
}

/* ── Speakers ── */
.speakers {
  background: #0a101e;
  border-top: 1px solid rgba(126, 147, 175, 0.12);
}
.speakers__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 24px;
  display: flex;
  flex-direction: column;
  gap: 64px;
}
.speakers__head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.speakers__eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #3fd0f5;
}
.speakers__heading {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
}
.speakers__sub {
  margin: 0;
  max-width: 56ch;
  font-size: 17px;
  line-height: 1.7;
  color: #9aabc2;
}
.speakers__day {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.speakers__day-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.speakers__day-num {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
}
.speakers__day-date {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #3fd0f5;
  white-space: nowrap;
}
.speakers__day-rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(63, 208, 245, 0.35), rgba(126, 147, 175, 0.05));
}
.speakers__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 22px;
}
.speaker-card {
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(126, 147, 175, 0.18);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s, transform 0.25s;
}
.speaker-card:hover {
  border-color: rgba(79, 163, 240, 0.55);
  background: rgba(38, 108, 196, 0.07);
  box-shadow: 0 0 32px rgba(79, 163, 240, 0.08);
  transform: translateY(-3px);
}
.speaker-card__media {
  background: linear-gradient(135deg, rgba(38, 108, 196, 0.18) 0%, rgba(63, 208, 245, 0.05) 100%);
  background: linear-gradient(-160deg, transparent 50%, rgba(0, 251, 255, 0.22) 90%);
  position: relative;
  width: 100%;
  /* aspect-ratio: 4 / 3; */
  overflow: hidden;
}
.speaker-card__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.speaker-card__photo--ph {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 80% 80% at 50% 30%, rgba(63, 208, 245, 0.18), transparent 70%),
    linear-gradient(160deg, #11203a 0%, #0a1424 100%);
}
.speaker-card__photo--ph span {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(143, 193, 236, 0.55);
}
.speaker-card__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 220, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.speaker-card__time {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #ffffff;
  background: rgba(7, 11, 20, 0.72);
  border: 1px solid rgba(63, 208, 245, 0.4);
  /* border-radius: 999px; */
  backdrop-filter: blur(6px);
}
.speaker-card__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 24px 28px;
}
.speaker-card__name {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
}
.speaker-card__talk {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: #9aabc2;
}

/* ── CTA ── */
.cta {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse 70% 90% at 50% 110%, rgba(38, 108, 196, 0.35), rgba(7, 11, 20, 0) 70%), #070b14;
  border-top: 1px solid rgba(126, 147, 175, 0.12);
}
.cta__inner {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 104px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  text-align: center;
}
.cta__body {
  margin: 0;
  font-size: 22px;
  line-height: 1.65;
  color: #dbe6f3;
}
.cta__body a {
  color: #3fd0f5;
  font-weight: 600;
  text-decoration: underline;
}
.cta__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 17px 52px;
  background: linear-gradient(92deg, #2a7de1, #2db8dd);
  color: #ffffff;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 999px;
  box-shadow: 0 12px 40px rgba(42, 125, 225, 0.4);
  transition: box-shadow 0.2s, transform 0.2s;
}
.cta__button:hover {
  box-shadow: 0 16px 50px rgba(42, 125, 225, 0.6);
  transform: translateY(-1px);
}
.cta__note {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: #7e93af;
}

/* ── Footer ── */
.site-footer {
  /* background: #ffffff; */
  border-top: 1px solid #00265a;
  margin-top: auto;
}
.site-footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.site-footer__logo img {
  height: 30px;
  width: auto;
}
.site-footer__social {
  display: flex;
  align-items: center;
  gap: 22px;
}
.site-footer__social img {
  height: 22px;
  width: auto;
  filter: invert(100%) brightness(50%);
}
.site-footer__social a:hover img {
  filter: invert(100%) brightness(100%);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .site-header__logo img {
    height: 32px;
  }
  .site-header__event img {
    height: 32px;
  }
  .invitation__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero__h1 { font-size: clamp(36px, 10vw, 60px); }
  .event-info__stats { grid-template-columns: repeat(2, 1fr); }
  .hero__kv { height: 220px; }
  .booth-map { height: 280px; }
  .keynote-banner {
    padding: 32px 28px 28px;
    gap: 22px 28px;
  }
  .keynote-banner__speakers {
    gap: 12px;
    padding-top: 20px;
  }
  .keynote-speaker {
    flex: 1 1 100%;
    min-width: 0;
    align-items: center;
  }
  .keynote-speaker__photo {
    width: 140px;
    height: 140px;
  }
  .keynote-speaker__info {
    flex: 1;
    margin: 0.9rem 0.9rem 0.9rem 0.25rem;
  }
  .speakers__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}
@media (max-width: 480px) {
  .event-info__stats { grid-template-columns: 1fr; }
  .keynote-banner {
    padding: 28px 20px 24px;
  }
  .keynote-speaker__photo {
    width: 112px;
    height: 112px;
  }
  .keynote-speaker__info {
    margin: 0.75rem 0.75rem 0.75rem 0.25rem;
  }
  .keynote-speaker__name { font-size: 1.15rem; }
  .keynote-speaker__title { font-size: 12px; }
}