/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: #1a1a1a;
  line-height: 1.6;
  background: #fff;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== Variables ===== */
:root {
  --navy: #0A1628;
  --navy-light: #0F1C2E;
  --blue: #1E6FE8;
  --blue-hover: #1558c0;
  --gray: #64748b;
  --light-gray: #f1f5f9;
  --white: #ffffff;
  --radius: 10px;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--blue);
  color: white;
}
.btn-primary:hover { background: var(--blue-hover); }
.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
}
.btn-secondary:hover { border-color: white; background: rgba(255,255,255,0.1); }
.btn-large { padding: 16px 32px; font-size: 1.05rem; }

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  color: white;
  padding: 16px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo span { color: #7eb6ff; }
.nav {
  display: flex;
  gap: 28px;
}
.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0.9;
  transition: opacity 0.2s;
}
.nav a:hover { opacity: 1; }
.header-cta { white-space: nowrap; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: white;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-light) 100%);
  color: white;
  padding: 100px 0 90px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.25;
  max-width: 800px;
  margin: 0 auto 20px;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 620px;
  margin: 0 auto 36px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.hero-trust {
  font-size: 0.95rem;
  opacity: 0.75;
}

/* ===== Sections ===== */
section { padding: 80px 0; }
.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--navy);
  letter-spacing: -0.02em;
}
.section-intro {
  text-align: center;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto 48px;
}

/* ===== Services ===== */
.services { background: var(--light-gray); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.service-card {
  background: white;
  padding: 36px 28px;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}
.service-icon {
  color: var(--blue);
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--navy);
}
.service-card p { color: var(--gray); font-size: 0.98rem; }

/* ===== Process ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  margin-top: 48px;
}
.step { text-align: center; }
.step-number {
  width: 48px;
  height: 48px;
  background: var(--blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0 auto 18px;
}
.step h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--navy);
}
.step p { color: var(--gray); font-size: 0.95rem; }

/* ===== About ===== */
.about { background: var(--light-gray); }
.about-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.about-content p {
  margin-bottom: 16px;
  color: #334155;
  font-size: 1.05rem;
}
.about-list {
  display: inline-block;
  text-align: left;
  margin-top: 28px;
}
.about-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: #334155;
}
.about-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}

/* ===== Exhibits ===== */
.exhibits-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.exhibit-card {
  text-align: center;
  min-width: 0;
}
.exhibit-placeholder {
  background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
  height: 160px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #475569;
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.exhibit-card p {
  font-size: 0.9rem;
  color: var(--gray);
}

/* ===== CTA Banner ===== */
.cta-banner {
  background: var(--navy);
  color: white;
  text-align: center;
  padding: 70px 0;
}
.cta-banner h2 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.cta-banner p {
  opacity: 0.85;
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Contact ===== */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
  background: white;
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: #334155;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(30,111,232,0.15);
}
.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 400;
  cursor: pointer;
}
.checkbox-group input { width: auto; }

/* ===== Footer ===== */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 32px 0;
  font-size: 0.9rem;
}
.footer p + p { margin-top: 6px; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .exhibits-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .nav, .header-cta { display: none; }
  .menu-toggle { display: flex; }
  .nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy);
    padding: 20px 24px;
    gap: 16px;
  }
  .form-row { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .exhibits-grid { grid-template-columns: minmax(0, 1fr); }
  .hero { padding: 70px 0 60px; }
  section { padding: 60px 0; }
  .contact-form { padding: 28px 20px; }
  .logo { font-size: 1.8rem; } /* smaller on mobile so it fits */
}
/* Exhibit media (images/video) */
.exhibit-media {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
  background: #0f172a;
  display: block;
  margin-bottom: 12px;
}