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

:root {
  --navy-950: #0d2148;
  --navy-900: #153a7a;
  --navy-800: #1f4f9c;
  --blue-500: #4e85d1;
  --blue-300: #8cb8ea;
  --blue-100: #e8f2ff;
  --ink: #132c57;
  --text: #26497c;
  --white: #ffffff;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
}

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

/* NAV */
nav {
  position: sticky; top: 0; z-index: 999;
  background: var(--navy-950);
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 40px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.brand-link { display: inline-flex; align-items: center; }
.brand-logo {
  width: 170px;
  height: auto;
  border-radius: 8px;
  border: 1px solid rgba(140, 184, 234, 0.35);
}
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: #d9e8fb; font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--blue-300); }
.nav-cta {
  background: linear-gradient(135deg, var(--blue-500), var(--navy-800));
  color: #fff !important; padding: 10px 22px;
  border-radius: 6px; font-weight: 600 !important;
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.9; }

/* HERO */
.hero {
  color: #fff;
  text-align: center;
  padding: 100px 40px 80px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 50%, var(--navy-800) 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  filter: saturate(0.8);
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 60% 40%, rgba(78, 133, 209, 0.35) 0%, transparent 70%);
}
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block;
  background: rgba(140, 184, 234, 0.2);
  border: 1px solid rgba(140, 184, 234, 0.6);
  color: #c9e0ff; font-size: 13px; font-weight: 600;
  padding: 6px 18px; border-radius: 30px; margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 12px;
}
.hero h1 span { color: var(--blue-300); }
.hero h2 {
  font-size: clamp(16px, 2.5vw, 24px);
  font-weight: 400; color: #cfe5ff;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 16px; color: #b8d7ff;
  max-width: 760px; margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-date {
  font-size: 15px; color: #e2efff;
  margin-bottom: 36px; font-weight: 500;
}
.btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--navy-800));
  color: #fff; padding: 14px 36px;
  border-radius: 8px; font-size: 16px; font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(25, 75, 149, 0.5);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(19, 58, 122, 0.5); }
.btn-outline {
  border: 2px solid var(--blue-300); color: var(--blue-300);
  padding: 14px 36px; border-radius: 8px;
  font-size: 16px; font-weight: 700;
  transition: background 0.2s, color 0.2s;
}
.btn-outline:hover { background: var(--blue-300); color: var(--navy-950); }

/* SECTIONS */
section { padding: 80px 40px; }
.container { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-size: 12px; font-weight: 700; letter-spacing: 2px;
  color: var(--navy-800); text-transform: uppercase; margin-bottom: 10px;
}
.section-title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800; color: var(--navy-950); margin-bottom: 16px; line-height: 1.2;
}
.section-sub {
  font-size: 16px; color: #4a6a99; max-width: 680px; line-height: 1.8;
}
.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* ABOUT */
.about { background: #f4f8ff; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-top: 40px; }
.about-img-placeholder {
  background: linear-gradient(135deg, #8cb8ea22, #1f4f9c22);
  border: 2px dashed var(--blue-500);
  border-radius: 16px; height: 340px;
  display: flex; align-items: center; justify-content: center;
  color: var(--navy-800); font-size: 14px; font-weight: 500;
}
.about-image-wrap,
.host-image-wrap {
  background: #fff;
  border: 1px solid #d7e7fb;
  border-radius: 16px;
  padding: 10px;
  box-shadow: 0 10px 30px rgba(19, 58, 122, 0.08);
}
.feature-image,
.host-photo {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
}
.about-text p { font-size: 16px; color: #345784; line-height: 1.8; margin-bottom: 16px; }
.about-text strong { color: var(--navy-800); }
.link-arrow { color: var(--navy-800); font-weight: 700; font-size: 15px; }
.link-arrow:hover { text-decoration: underline; }

/* THEME */
.theme { background: linear-gradient(135deg, var(--navy-950), var(--navy-900)); color: #fff; }
.theme .section-title { color: #fff; }
.theme .section-label { color: var(--blue-300); }
.theme-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 48px; }
.theme-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(140, 184, 234, 0.3);
  border-radius: 16px; padding: 36px;
}
.theme-card .icon { font-size: 40px; margin-bottom: 16px; }
.theme-card h3 { font-size: 22px; font-weight: 700; color: #c3defd; margin-bottom: 12px; }
.theme-card p { font-size: 15px; color: #d8e8ff; line-height: 1.7; }
.theme-tagline {
  text-align: center; margin-top: 40px;
  font-size: 18px; font-style: italic; color: #bfd9fd;
}

/* WHY ATTEND */
.why { background: #fff; }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
.why-card {
  background: #f4f8ff; border-radius: 14px;
  padding: 28px 24px; border: 1px solid #deebfb;
  transition: transform 0.2s, box-shadow 0.2s;
}
.why-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(25, 75, 149, 0.12); }
.why-card .icon { font-size: 32px; margin-bottom: 14px; }
.why-card h4 { font-size: 16px; font-weight: 700; color: var(--navy-950); margin-bottom: 8px; }
.why-card p { font-size: 14px; color: #4f6e99; line-height: 1.6; }

/* HIGHLIGHTS */
.highlights { background: #f4f8ff; }
.highlights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.highlight-card {
  background: #fff; border-radius: 14px;
  padding: 28px 22px; border: 1px solid #deebfb;
  text-align: center;
  transition: transform 0.2s;
}
.highlight-card:hover { transform: translateY(-4px); }
.highlight-card .icon { font-size: 36px; margin-bottom: 14px; }
.highlight-card h4 { font-size: 16px; font-weight: 700; color: var(--navy-950); margin-bottom: 8px; }
.highlight-card p { font-size: 13px; color: #4f6e99; line-height: 1.6; }
.program-image-wrap {
  margin-top: 28px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(19, 58, 122, 0.15);
}
.program-image { width: 100%; max-height: 460px; object-fit: cover; }

/* AUDIENCE */
.audience { background: #fff; }
.audience-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; justify-content: center; }
.tag {
  background: #edf5ff; color: var(--navy-800);
  border: 1px solid #c6ddfb; border-radius: 30px;
  padding: 10px 22px; font-size: 14px; font-weight: 600;
}

/* PILLARS */
.pillars { background: #f4f8ff; }
.pillars-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.pillar-card {
  background: #fff; border-radius: 14px;
  padding: 28px 22px; border-left: 4px solid var(--navy-800);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}
.pillar-card .num { font-size: 28px; font-weight: 800; color: #d4e5fb; margin-bottom: 8px; }
.pillar-card h4 { font-size: 16px; font-weight: 700; color: var(--navy-950); margin-bottom: 10px; }
.pillar-card ul { list-style: none; padding: 0; }
.pillar-card ul li { font-size: 13px; color: #4f6e99; padding: 3px 0; }
.pillar-card ul li::before { content: "→ "; color: var(--navy-800); font-weight: 700; }

/* HOST */
.host { background: linear-gradient(135deg, var(--navy-950), var(--navy-900)); color: #fff; }
.host .section-title { color: #fff; }
.host .section-label { color: var(--blue-300); }
.host-inner { display: flex; gap: 60px; align-items: center; margin-top: 48px; }
.host-img {
  width: 260px; height: 300px; flex-shrink: 0;
  background: rgba(140,184,234,0.15);
  border: 2px dashed var(--blue-300); border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-300); font-size: 13px;
}
.host-photo { width: 260px; height: 300px; object-fit: cover; }
.host-text h3 { font-size: 28px; font-weight: 800; color: #d8e8ff; margin-bottom: 6px; }
.host-text .role { font-size: 14px; color: #b4d0f8; margin-bottom: 20px; font-weight: 500; }
.host-text p { font-size: 15px; color: #d8e8ff; line-height: 1.8; margin-bottom: 24px; }

/* PARTNERS / GALLERY */
.partners { background: #ffffff; }
.conference-gallery {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.gallery-item {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #d7e7fb;
  background: linear-gradient(180deg, #f7fbff 0%, #eef5ff 100%);
  aspect-ratio: 4 / 3;
  box-shadow: 0 8px 22px rgba(19, 58, 122, 0.1);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.gallery-item:hover img { transform: scale(1.06); }

/* CTA BANNER */
.cta-banner {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-800));
  color: #fff; text-align: center; padding: 80px 40px;
}
.cta-logo {
  width: min(280px, 82vw);
  margin: 0 auto 24px;
  border-radius: 12px;
  border: 1px solid rgba(140, 184, 234, 0.45);
}
.cta-banner h2 { font-size: clamp(24px, 4vw, 42px); font-weight: 800; margin-bottom: 12px; }
.cta-banner p { font-size: 16px; color: #dbeaff; margin-bottom: 32px; }
.cta-banner .btn-white {
  background: #fff; color: var(--navy-900);
  padding: 14px 36px; border-radius: 8px;
  font-size: 16px; font-weight: 700;
  margin: 0 8px;
  transition: transform 0.2s;
  display: inline-block;
}
.cta-banner .btn-white:hover { transform: translateY(-2px); }
.cta-banner .btn-ghost {
  border: 2px solid #fff; color: #fff;
  padding: 14px 36px; border-radius: 8px;
  font-size: 16px; font-weight: 700;
  margin: 0 8px; display: inline-block;
  transition: background 0.2s;
}
.cta-banner .btn-ghost:hover { background: rgba(255,255,255,0.15); }

/* NEWSLETTER */
.newsletter { background: #f4f8ff; text-align: center; }
.newsletter-form { display: flex; gap: 12px; justify-content: center; margin-top: 28px; flex-wrap: wrap; }
.newsletter-form input {
  padding: 14px 20px; border-radius: 8px;
  border: 1px solid var(--blue-500); font-size: 15px;
  width: 320px; outline: none;
  color: var(--navy-950);
}
.newsletter-form button {
  background: linear-gradient(135deg, var(--blue-500), var(--navy-800));
  color: #fff; padding: 14px 28px;
  border: none; border-radius: 8px;
  font-size: 15px; font-weight: 700; cursor: pointer;
}

/* FOOTER */
footer {
  background: #0a1a3b; color: #d0e2fb;
  padding: 60px 40px 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; max-width: 1100px; margin: 0 auto 40px; }
.footer-brand h3 { color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: #b2c9ea; }
.footer-brand .contact-info { margin-top: 16px; font-size: 13px; color: #b2c9ea; line-height: 1.9; }
.footer-brand .contact-info a { color: #d0e2fb; }
.footer-col h4 { color: #9ec3f3; font-size: 14px; font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; text-transform: uppercase; }
.footer-col a { display: block; font-size: 14px; color: #b2c9ea; margin-bottom: 8px; transition: color 0.2s; }
.footer-col a:hover { color: #dcecff; }
.footer-bottom {
  border-top: 1px solid #213f73; padding-top: 24px;
  text-align: center; font-size: 13px; color: #93b3df;
  max-width: 1100px; margin: 0 auto;
}
.footer-tagline { color: #b6d3f7; font-style: italic; margin-bottom: 8px; font-size: 15px; }

/* RESPONSIVE */
@media (max-width: 960px) {
  .about-grid,
  .theme-grid,
  .host-inner { grid-template-columns: 1fr; }

  .host-inner { display: grid; }

  .why-grid,
  .highlights-grid,
  .pillars-grid,
  .conference-gallery { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  nav { padding: 14px 20px; }
  .brand-logo { width: 140px; }
  .nav-links { display: none; }
  section { padding: 60px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 70px 20px 60px; }
}

@media (max-width: 520px) {
  .why-grid,
  .highlights-grid,
  .pillars-grid,
  .conference-gallery { grid-template-columns: 1fr; }

  .cta-banner .btn-white,
  .cta-banner .btn-ghost {
    display: block;
    margin: 8px auto;
    max-width: 280px;
  }
}