@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&display=swap');

:root {
  --color-primary:   #003366;
  --color-secondary: #1A73E8;
  --color-bg-white:  #FFFFFF;
  --color-bg-gray:   #F4F4F4;
  --color-text:      #333333;
  --color-border:    #CCCCCC;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg-white);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; color: var(--color-primary); line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 700; color: var(--color-primary); line-height: 1.2; }
h3 { font-size: 1.2rem; font-weight: 600; color: var(--color-primary); }

p { line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; padding: 0; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section--gray { background: var(--color-bg-gray); }
.section--dark { background: var(--color-primary); }
.section--dark h2 { color: #fff; }

.section__header { text-align: center; margin-bottom: 56px; }
.section__header p { max-width: 680px; margin: 16px auto 0; font-size: 1.05rem; color: #666; }

/* ─── Site Header ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.header__logo { max-height: 40px; }

.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav a { font-size: 0.9rem; font-weight: 600; color: var(--color-text); transition: color 0.2s; }
.site-nav a:hover { color: var(--color-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-primary); transition: all 0.3s; }

/* ─── Footer ─── */
.site-footer {
  background: #001f3f;
  color: rgba(255,255,255,0.7);
  padding: 32px 0;
  text-align: center;
}
.footer__inner { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.site-footer p { font-size: 0.875rem; }
.footer__nav { display: flex; gap: 24px; }
.footer__nav a { font-size: 0.875rem; color: rgba(255,255,255,0.7); transition: color 0.2s; }
.footer__nav a:hover { color: #fff; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 14px);
    left: -24px;
    right: -24px;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    gap: 16px;
  }
  .site-nav.is-open { display: flex; }
  .section { padding: 56px 0; }
  .section__header { margin-bottom: 40px; }
}