:root {
  --white: #ffffff;
  --sky-blue: #4da3ff;
  --sky-blue-deep: #2b84e8;
  --sky-blue-soft: #eaf4ff;
  --sky-blue-ultra-soft: #f5faff;

  --dark-gray: #1f2937;
  --dark-deep: #111827;
  --mid-gray: #4b5563;
  --soft-gray: #6b7280;
  --light-gray: #f3f4f6;

  --border: rgba(31, 41, 55, 0.12);
  --border-soft: rgba(31, 41, 55, 0.08);
  --border-blue: rgba(77, 163, 255, 0.18);

  --shadow: 0 14px 34px rgba(31, 41, 55, 0.10);
  --shadow-soft: 0 10px 24px rgba(31, 41, 55, 0.07);
  --shadow-premium: 0 22px 52px rgba(31, 41, 55, 0.10);

  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --max-width: 1140px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.28s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(77, 163, 255, 0.10), transparent 24%),
    radial-gradient(circle at top right, rgba(77, 163, 255, 0.07), transparent 20%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  color: var(--dark-gray);
  line-height: 1.65;
}

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

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

.container {
  width: min(92%, var(--max-width));
  margin: 0 auto;
}

/* =========================
   HEADER / NAV
========================= */
header {
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(31, 41, 55, 0.06);
  transition:
    background var(--transition-medium),
    box-shadow var(--transition-medium),
    border-color var(--transition-medium);
}

header.scrolled {
  background: rgba(255, 255, 255, 0.94);
  border-bottom-color: rgba(31, 41, 55, 0.08);
  box-shadow: 0 10px 24px rgba(31, 41, 55, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 16px;
}

.brand {
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.brand span {
  color: var(--sky-blue);
}

.nav-links {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--mid-gray);
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast);
}

.nav-links a:hover {
  color: var(--sky-blue-deep);
  background: var(--sky-blue-soft);
}

.nav-links a.active {
  color: var(--sky-blue-deep);
  background: var(--sky-blue-soft);
  font-weight: 700;
}

/* =========================
   BUTTON
========================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(180deg, var(--sky-blue) 0%, var(--sky-blue-deep) 100%);
  color: var(--white);
  box-shadow: 0 12px 24px rgba(77, 163, 255, 0.24);
}

.btn-primary:hover {
  box-shadow: 0 16px 28px rgba(77, 163, 255, 0.30);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.92);
  border-color: var(--border);
  color: var(--dark-gray);
  box-shadow: var(--shadow-soft);
}

.btn-secondary:hover {
  border-color: rgba(77, 163, 255, 0.28);
  background: var(--white);
}

/* =========================
   HERO
========================= */
.hero {
  padding: 92px 0 62px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 30px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--sky-blue-soft);
  color: var(--sky-blue-deep);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 18px;
  border: 1px solid rgba(77, 163, 255, 0.12);
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.9rem);
  line-height: 1.08;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.05rem;
  color: var(--mid-gray);
  max-width: 720px;
  margin-bottom: 26px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

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

.metric {
  background: rgba(255, 255, 255, 0.90);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.metric:hover {
  transform: translateY(-3px);
  border-color: rgba(77, 163, 255, 0.22);
  box-shadow: 0 14px 28px rgba(31, 41, 55, 0.08);
}

.metric h3 {
  font-size: 1.4rem;
  margin-bottom: 2px;
}

.metric p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--mid-gray);
}

.hero-card {
  background: linear-gradient(145deg, #ffffff 0%, #eef6ff 100%);
  border: 1px solid rgba(77, 163, 255, 0.16);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow-premium);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero-card::before,
.hero-card::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: rgba(77, 163, 255, 0.10);
  pointer-events: none;
}

.hero-card::before {
  width: 190px;
  height: 190px;
  right: -38px;
  top: -38px;
}

.hero-card::after {
  width: 126px;
  height: 126px;
  left: -26px;
  bottom: -26px;
}

.card-label {
  display: inline-block;
  background: var(--dark-gray);
  color: var(--white);
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.session-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.session-item {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(31, 41, 55, 0.08);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  position: relative;
  z-index: 1;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.session-item:hover {
  transform: translateY(-2px);
  border-color: rgba(77, 163, 255, 0.20);
  background: rgba(255, 255, 255, 0.98);
}

.session-item strong {
  display: block;
  margin-bottom: 4px;
}

/* =========================
   SECTION
========================= */
section {
  padding: 44px 0;
  scroll-margin-top: 90px;
}

.section-head {
  margin-bottom: 22px;
  max-width: 760px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--mid-gray);
}

/* =========================
   GRID
========================= */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

/* =========================
   CARD
========================= */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(31, 41, 55, 0.12);
  border-color: rgba(77, 163, 255, 0.20);
}

.card h3 {
  font-size: 1.16rem;
  margin-bottom: 10px;
}

.card p,
.card li {
  color: var(--mid-gray);
  font-size: 0.97rem;
}

.card ul {
  padding-left: 18px;
}

.pill {
  display: inline-block;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  background: var(--sky-blue-soft);
  color: var(--sky-blue-deep);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.overview-box,
.resources {
  background: linear-gradient(180deg, rgba(77, 163, 255, 0.06), rgba(255,255,255,0));
  border-radius: var(--radius-xl);
  padding: 28px;
  border: 1px solid rgba(77, 163, 255, 0.12);
}

/* =========================
   RESOURCE / CONTACT LINK
========================= */
.resource-link,
.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--dark-gray);
  box-shadow: var(--shadow-soft);
  margin-bottom: 12px;
  transition:
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.resource-link:last-child,
.contact-link:last-child {
  margin-bottom: 0;
}

.resource-link:hover,
.contact-link:hover {
  border-color: rgba(77, 163, 255, 0.38);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(31, 41, 55, 0.08);
  background: #fcfeff;
}

.resource-link span,
.contact-link span {
  font-size: 1.1rem;
  color: var(--sky-blue-deep);
  flex-shrink: 0;
}

.notice,
.muted {
  margin-top: 6px;
  font-size: 0.92rem;
  color: var(--mid-gray);
}

/* =========================
   ASSESSMENT
========================= */
.assessment-grid .card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
}

/* =========================
   SPEAKER
========================= */
.speaker-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow);
}

.speaker-avatar {
  width: 180px;
  height: 180px;
  border-radius: 28px;
  background: linear-gradient(145deg, #dceeff 0%, #ffffff 100%);
  border: 1px solid rgba(77, 163, 255, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 800;
  color: var(--sky-blue-deep);
  box-shadow: var(--shadow-soft);
}

.speaker-info h3 {
  font-size: 1.65rem;
  margin-bottom: 6px;
}

.speaker-role {
  color: var(--sky-blue-deep);
  font-weight: 700;
  margin-bottom: 14px;
}

.speaker-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.speaker-point {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: #fbfdff;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.speaker-point:hover {
  transform: translateY(-2px);
  border-color: rgba(77, 163, 255, 0.18);
}

.speaker-point strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.98rem;
}

/* =========================
   CTA
========================= */
.cta {
  padding: 28px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--dark-gray) 0%, #111827 100%);
  color: var(--white);
  box-shadow: 0 24px 42px rgba(17, 24, 39, 0.20);
  position: relative;
  overflow: hidden;
}

.cta::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: rgba(77, 163, 255, 0.10);
}

.cta h2 {
  margin-bottom: 10px;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta p {
  color: rgba(255,255,255,0.80);
  margin-bottom: 18px;
  max-width: 760px;
  position: relative;
  z-index: 1;
}

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

footer {
  padding: 34px 0 56px;
  color: var(--mid-gray);
  font-size: 0.94rem;
}

/* =========================
   ANIMATION
========================= */
.fade-in {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}

.fade-in.show {
  opacity: 1;
  transform: translateY(0);
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 980px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .speaker-card,
  .speaker-points {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .speaker-avatar {
    width: 140px;
    height: 140px;
    border-radius: 22px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 56px;
  }

  .nav-links {
    gap: 8px;
  }

  .nav-links a {
    padding: 8px 12px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }

  .overview-box,
  .resources,
  .speaker-card,
  .cta,
  .hero-card,
  .card {
    padding: 22px;
  }
}