:root {
  --clr-primary: #063b52;
  --clr-primary-2: #0b516f;
  --clr-accent: #22c1dc;
  --clr-accent-2: #9ecde3;
  --clr-bg: #f4f7fa;
  --clr-surface: #ffffff;
  --clr-text: #111827;
  --clr-muted: #5b6576;
  --clr-line: rgba(6,59,82,.14);
  --clr-glow: rgba(34,193,220,.28);

  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-soft: 0 14px 35px rgba(6,59,82,.10);
  --shadow-card: 0 10px 24px rgba(6,59,82,.08);
  --max-w: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: 'Open Sans', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1rem;
}

.section {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}

.eyebrow {
  display: inline-block;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: .65rem;
}

.section-title {
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-weight: 800;
  line-height: 1.05;
  color: var(--clr-primary);
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin: 0 0 .75rem;
}

.section-lead {
  max-width: 70ch;
  color: var(--clr-muted);
  margin: 0;
}

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(12px);
  background: rgba(244,247,250,.86);
  border-bottom: 1px solid var(--clr-line);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: .85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  min-width: 0;
}

.brand-logo-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(158,205,227,.45), rgba(34,193,220,.22));
  box-shadow: inset 0 0 10px rgba(34,193,220,.16);
  overflow: hidden;
  flex: 0 0 auto;
}

.brand-logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-text {
  min-width: 0;
}

.brand-title {
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--clr-primary);
  line-height: 1.05;
}

.brand-sub {
  font-size: .76rem;
  color: var(--clr-muted);
  line-height: 1.1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  font-size: .95rem;
  font-weight: 700;
  color: var(--clr-primary);
  opacity: .9;
}

.btn,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  border-radius: 999px;
  font-weight: 700;
  padding: .85rem 1.15rem;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  cursor: pointer;
}

.btn {
  background: var(--clr-primary);
  color: #fff;
  box-shadow: 0 10px 22px rgba(6,59,82,.22);
}

.btn:hover {
  transform: translateY(-2px);
  background: #042f42;
}

.btn-outline {
  background: #fff;
  color: var(--clr-primary);
  border: 1px solid rgba(6,59,82,.18);
  box-shadow: 0 8px 20px rgba(6,59,82,.08);
}

.btn-outline:hover {
  transform: translateY(-2px);
  border-color: rgba(34,193,220,.45);
}

/* HERO */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 64% 26%, rgba(34,193,220,.24), transparent 24%),
    linear-gradient(180deg, rgba(4,35,49,.78), rgba(6,59,82,.92)),
    linear-gradient(135deg, #063b52, #0b516f);
  color: #fff;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 0 62%, rgba(255,255,255,.04) 62% 62.4%, transparent 62.4%),
    linear-gradient(0deg, transparent 0 82%, rgba(255,255,255,.04) 82% 82.25%, transparent 82.25%);
  pointer-events: none;
  opacity: .8;
}

.hero-shape-1,
.hero-shape-2,
.hero-shape-3 {
  position: absolute;
  right: -2%;
  transform: skewX(-34deg);
  border-radius: 8px;
  box-shadow: 0 12px 24px rgba(0,0,0,.12);
}

.hero-shape-1 {
  top: 11%;
  width: 190px;
  height: 240px;
  background: rgba(158,205,227,.95);
}

.hero-shape-2 {
  top: 42%;
  width: 170px;
  height: 150px;
  background: rgba(34,193,220,.96);
  right: 7%;
}

.hero-shape-3 {
  bottom: 6%;
  width: 130px;
  height: 120px;
  background: rgba(10,96,130,.78);
  right: -1%;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(2.8rem, 8vw, 6rem) 1rem;
  display: grid;
  grid-template-columns: 1.25fr .95fr;
  gap: 2rem;
  align-items: center;
}

.hero-copy {
  max-width: 760px;
}

.hero-seal {
  width: 92px;
  height: 92px;
  border-radius: 999px;
  background: #fff;
  padding: .45rem;
  box-shadow: 0 12px 32px rgba(0,0,0,.16);
  margin-bottom: 1rem;
  overflow: hidden;
}

.hero-seal img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 999px;
}

.hero-motto {
  display: inline-flex;
  gap: .75rem;
  align-items: center;
  background: rgba(158,205,227,.18);
  border: 1px solid rgba(255,255,255,.12);
  color: #fff;
  padding: .45rem .9rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-title {
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: clamp(2.3rem, 6vw, 5rem);
  line-height: .94;
  letter-spacing: -.02em;
  margin: 0 0 1rem;
}

.hero-title .subline {
  display: block;
  color: rgba(255,255,255,.84);
  font-size: .54em;
  margin-top: .15em;
}

.hero-year {
  display: inline-block;
  margin-top: .15em;
  color: #fff;
}

.hero-lead {
  max-width: 58ch;
  font-size: clamp(1rem, 2vw, 1.16rem);
  color: rgba(255,255,255,.9);
  margin: 0 0 1.4rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1rem;
}

.hero-actions .btn-outline {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.18);
  color: #fff;
  backdrop-filter: blur(6px);
}

.hero-side {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-hand {
  position: absolute;
  inset: auto -2% -2% auto;
  width: min(620px, 108%);
  opacity: 1;
  z-index: 1;
  filter: drop-shadow(0 22px 44px rgba(0,0,0,.28));
}

.hero-info-card {
  position: relative;
  z-index: 2;
  width: min(360px, 100%);
  margin-left: auto;
  margin-top: 5.5rem;
  background: rgba(4, 28, 40, 0.72);
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 22px;
  padding: 1.2rem 1.2rem 1.15rem;
  box-shadow: 0 16px 42px rgba(0,0,0,.24);
}

.hero-info-block + .hero-info-block {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,.14);
}

.hero-info-date {
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1.05;
  margin: 0 0 .2rem;
}

.hero-info-audience,
.hero-info-location {
  font-size: .96rem;
  color: rgba(255,255,255,.88);
  margin: 0;
}

/* COUNTDOWN */
.countdown-wrap {
  margin-top: 1rem;
}

.countdown-label {
  font-size: .86rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: rgba(255,255,255,.8);
  margin-bottom: .6rem;
  font-weight: 700;
}

.countdown {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  width: fit-content;
}

.timebox {
  min-width: 82px;
  background: rgba(255,255,255,.95);
  color: var(--clr-primary);
  border-radius: 16px;
  padding: .65rem .85rem;
  text-align: center;
  box-shadow: 0 10px 20px rgba(0,0,0,.10);
}

.timebox .num {
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1.55rem;
  line-height: 1;
  font-weight: 800;
  color: var(--clr-primary);
}

.timebox .lbl {
  display: block;
  margin-top: .25rem;
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-muted);
  font-weight: 700;
}

/* INFO STRIP */
.quick-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 1.5rem;
}

.quick-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-xl);
  padding: 1rem 1rem .95rem;
  box-shadow: var(--shadow-card);
}

.quick-label {
  font-size: .8rem;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 700;
  margin-bottom: .35rem;
}

.quick-value {
  color: var(--clr-primary);
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.2;
}

/* FEATURE GRID */
.grid-3 {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.feature-card,
.content-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-xl);
  padding: 1.15rem;
  box-shadow: var(--shadow-card);
}

.feature-card h3,
.content-card h3 {
  margin: 0 0 .45rem;
  color: var(--clr-primary);
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1.14rem;
}

.feature-card p,
.content-card p,
.content-card li {
  color: var(--clr-muted);
  margin: 0;
}

/* MINI HERO */
.mini-hero {
  position: relative;
  min-height: 42vh;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(6,59,82,.45), rgba(6,59,82,.78)),
    url('cyber_ties.jpg') center/cover no-repeat;
  background-attachment: fixed;
  display: grid;
  place-items: center;
  border-top: 1px solid var(--clr-line);
  border-bottom: 1px solid var(--clr-line);
}

.mini-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(34,193,220,.14), transparent 55%);
  pointer-events: none;
}

.mini-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  padding: 2rem 1rem;
  text-align: center;
}

.mini-hero-text {
  margin: 0;
  color: #fff;
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.12;
  font-weight: 800;
  text-shadow: 0 2px 14px rgba(0,0,0,.34), 0 0 18px rgba(34,193,220,.24);
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% {
    text-shadow: 0 2px 14px rgba(0,0,0,.34), 0 0 18px rgba(34,193,220,.24);
  }
  50% {
    text-shadow: 0 2px 18px rgba(0,0,0,.45), 0 0 28px rgba(34,193,220,.46);
  }
}

/* PARENT DAY */
.two-col {
  display: grid;
  grid-template-columns: 1.2fr .9fr;
  gap: 1.25rem;
  align-items: start;
}

.schedule-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-xl);
  padding: 1.15rem;
  box-shadow: var(--shadow-card);
}

.schedule-card h3 {
  margin: 0 0 .85rem;
  color: var(--clr-primary);
  font-family: 'Exo 2', 'Montserrat', sans-serif;
}

.timeline {
  display: grid;
  gap: .85rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: .9rem;
  padding-bottom: .85rem;
  border-bottom: 1px dashed rgba(6,59,82,.14);
}

.timeline-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.timeline-time {
  color: var(--clr-primary);
  font-weight: 800;
  font-size: .96rem;
}

.timeline-copy strong {
  color: var(--clr-primary);
  display: block;
  margin-bottom: .12rem;
}

.timeline-copy span {
  color: var(--clr-muted);
  font-size: .95rem;
}

.timeline-session-list {
  margin: .55rem 0 0;
  padding-left: 1.1rem;
  color: var(--clr-muted);
}

.timeline-session-list li + li {
  margin-top: .18rem;
}

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

.track-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-card);
}

.track-card h4 {
  margin: 0 0 .45rem;
  color: var(--clr-primary);
  font-size: 1rem;
  font-family: 'Exo 2', 'Montserrat', sans-serif;
}

.track-card ul {
  margin: .5rem 0 0 1rem;
  padding: 0;
  color: var(--clr-muted);
}

/* STANDARDS + LOCATION + SPONSORS */
.grid-2 {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr 1fr;
}

.standards-list,
.sponsor-list {
  display: grid;
  gap: .75rem;
}

.standards-item,
.sponsor-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-card);
}

.standards-item strong,
.sponsor-item strong {
  color: var(--clr-primary);
  display: block;
  margin-bottom: .2rem;
}

.sponsor-logo-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 1rem;
}

.sponsor-logo-card {
  background: var(--clr-surface);
  border: 1px dashed rgba(6,59,82,.22);
  border-radius: var(--radius-lg);
  min-height: 120px;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-card);
  padding: 1rem;
  text-align: center;
}

.sponsor-logo-label {
  color: var(--clr-muted);
  font-weight: 700;
  font-size: .95rem;
}

/* ACCORDION */
.accordion {
  display: grid;
  gap: .9rem;
  margin-top: 1.2rem;
}

details.session {
  background: var(--clr-surface);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}

details.session[open] {
  border-color: rgba(34,193,220,.45);
  box-shadow: 0 0 0 1px rgba(34,193,220,.12), 0 14px 28px rgba(6,59,82,.10);
}

details.session summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1rem;
  display: grid;
  gap: .35rem;
  user-select: none;
}

details.session summary::-webkit-details-marker {
  display: none;
}

.session-title {
  color: var(--clr-primary);
  font-weight: 800;
  font-family: 'Exo 2', 'Montserrat', sans-serif;
}

.session-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  color: var(--clr-muted);
  font-size: .92rem;
}

.pill {
  display: inline-block;
  padding: .25rem .55rem;
  border-radius: 999px;
  font-size: .75rem;
  background: rgba(34,193,220,.10);
  color: var(--clr-primary);
  border: 1px solid rgba(34,193,220,.26);
  font-weight: 700;
}

.accordion-panel {
  overflow: hidden;
  height: 0;
  transition: height .28s ease;
}

.accordion-panel-inner {
  padding: 0 1rem 1rem;
}

.session-desc {
  margin: .15rem 0 .55rem;
  color: var(--clr-text);
}

/* CTA / FOOTER */
.cta-band {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-2));
  color: #fff;
  border-radius: 28px;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1.3fr auto;
  gap: 1rem;
  align-items: center;
  box-shadow: 0 16px 36px rgba(6,59,82,.16);
}

.cta-band h3 {
  margin: 0 0 .25rem;
  font-family: 'Exo 2', 'Montserrat', sans-serif;
  font-size: 1.6rem;
}

.cta-band p {
  margin: 0;
  color: rgba(255,255,255,.86);
}

footer {
  background: #fff;
  border-top: 1px solid var(--clr-line);
  margin-top: 3rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.25rem 1rem 1.5rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr auto;
  align-items: center;
}

.footer-copy {
  color: var(--clr-muted);
  font-size: .95rem;
}

@media (max-width: 1100px) {
  .hero-inner,
  .two-col,
  .grid-2,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .hero-side {
    min-height: 340px;
  }

  .hero-info-card {
    margin: 0 auto 0 0;
  }

  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 780px) {
  .grid-3,
  .track-grid,
  .quick-grid,
  .sponsor-logo-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: .2rem;
  }

  .hero-actions,
  .nav-actions {
    width: 100%;
  }

  .hero-side {
    min-height: 260px;
  }

  .hero-hand {
    width: 100%;
    opacity: .24;
  }

  .mini-hero {
    background-attachment: scroll;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}