/* ===========================================================
   Tactique Mondiale — layout.css
   Container, grid, header, footer, sections
   =========================================================== */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2.4rem);
}

.section {
  padding-block: var(--section-y);
  position: relative;
}

.section--tight { padding-block: clamp(2.4rem, 5vw, 4rem); }

.section-head {
  max-width: 720px;
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.section-head.is-centered {
  margin-inline: auto;
  text-align: center;
}

.section-head .eyebrow { margin-bottom: 1rem; }

.section-head p {
  color: var(--bp-muted);
  font-size: 1.08rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 11, 29, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--bp-line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--bp-white);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand:hover { color: var(--bp-white); }

.brand__mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
}

.brand__sub {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--bp-muted-dim);
  margin-top: 2px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(.6rem, 1.6vw, 1.6rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  font-family: var(--font-display);
  font-size: .92rem;
  font-weight: 500;
  color: var(--bp-muted);
  padding: .4rem 0;
  position: relative;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--bp-cyan);
  transition: width var(--t-fast);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--bp-white);
}

.nav__links a:hover::after,
.nav__links a[aria-current="page"]::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--bp-line-strong);
  border-radius: var(--radius-sm);
  width: 44px; height: 44px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: var(--bp-white);
  position: relative;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav__toggle span::before { position: absolute; top: -6px; }
.nav__toggle span::after  { position: absolute; top: 6px; }

.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after  { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--bp-line);
  background: var(--bp-navy-800);
  padding-block: clamp(2.8rem, 5vw, 4rem) 2rem;
  margin-top: var(--section-y);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.2rem;
}

.footer-col h4 {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--bp-muted-dim);
  margin-bottom: 1.1rem;
}

.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: .6rem; }
.footer-col a { color: var(--bp-muted); font-size: .95rem; }
.footer-col a:hover { color: var(--bp-cyan); }

.footer-about p {
  color: var(--bp-muted);
  font-size: .95rem;
  margin-top: 1rem;
}

.footer-social {
  display: flex;
  gap: .7rem;
  margin-top: 1.2rem;
}

.footer-social a {
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--bp-line-strong);
  border-radius: 50%;
  color: var(--bp-muted);
  transition: all var(--t-fast);
}
.footer-social a:hover {
  border-color: var(--bp-cyan);
  color: var(--bp-cyan);
  transform: translateY(-3px);
}

.footer-bottom {
  margin-top: 2.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--bp-line);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  font-size: .85rem;
  color: var(--bp-muted-dim);
}

/* ---------- Grids ---------- */
.grid {
  display: grid;
  gap: var(--gap);
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

/* ---------- Article layout ---------- */
.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.article-body {
  max-width: 760px;
  font-size: 1.06rem;
}

.article-body h2 { margin-top: 2.4rem; }
.article-body h3 { margin-top: 1.8rem; color: var(--bp-blue-bright); }

.article-aside {
  position: sticky;
  top: 96px;
  font-size: .92rem;
}

@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-shell { grid-template-columns: 1fr; }
  .article-aside { position: static; }
}

@media (max-width: 860px) {
  .nav__toggle { display: inline-flex; }
  .nav__links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bp-navy-800);
    border-bottom: 1px solid var(--bp-line);
    padding: .5rem clamp(1.1rem, 4vw, 2.4rem) 1.2rem;
    transform: translateY(-130%);
    transition: transform var(--t-med);
    box-shadow: 0 24px 50px rgba(0,0,0,.45);
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links li { width: 100%; border-bottom: 1px solid var(--bp-line); }
  .nav__links li:last-child { border-bottom: 0; }
  .nav__links a { display: block; padding: .9rem 0; width: 100%; }
  .nav__links a::after { display: none; }
}

@media (max-width: 720px) {
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}