/* ===========================================================
   Keeperlegender — layout.css
   Container, grid, header, footer, split-screen
   =========================================================== */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.section {
  padding-block: clamp(56px, 9vw, 120px);
}

.section--tight {
  padding-block: clamp(40px, 6vw, 80px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 20, 20, 0.72);
  border-bottom: 1px solid var(--line-soft);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand b {
  color: var(--lime);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav__links a {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  padding: 0.5rem 0.8rem;
  border-radius: var(--r-sm);
}

.nav__links a:hover {
  color: var(--ink);
  background: rgba(200, 245, 59, 0.06);
}

.nav__links a.is-active {
  color: var(--lime);
}

.nav__links a.is-active::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.18rem;
  height: 2px;
  background: var(--lime);
  border-radius: 2px;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: transparent;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin-inline: auto;
  background: var(--lime);
  border-radius: 2px;
  transition: var(--t-fast);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Split-screen hero ---------- */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: min(86vh, 760px);
  border-bottom: 1px solid var(--line-soft);
}

.split__left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(40px, 6vw, 96px) var(--gut);
  background:
    linear-gradient(160deg, rgba(15, 182, 166, 0.08), transparent 55%),
    var(--bg-2);
}

.split__right {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 70% 20%, rgba(15, 182, 166, 0.55), transparent 55%),
    radial-gradient(90% 90% at 20% 90%, rgba(200, 245, 59, 0.35), transparent 50%),
    linear-gradient(150deg, var(--teal-soft), var(--bg-3));
  border-left: 1px solid var(--line-soft);
}

/* Generic split content (interior pages) */
.split-head {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: stretch;
  border-bottom: 1px solid var(--line-soft);
}

.split-head__text {
  padding: clamp(48px, 7vw, 110px) var(--gut);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--bg-2);
}

.split-head__visual {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  border-left: 1px solid var(--line-soft);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding-block: clamp(48px, 6vw, 80px) 28px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(28px, 4vw, 56px);
}

.footer__col h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--lime);
  margin-bottom: 1rem;
}

.footer__col ul li {
  margin-bottom: 0.55rem;
}

.footer__col ul a {
  color: var(--muted);
  font-size: 0.94rem;
}

.footer__col ul a:hover {
  color: var(--ink);
}

.footer__about p {
  font-size: 0.95rem;
  max-width: 34ch;
  margin-top: 0.9rem;
}

.footer__bottom {
  margin-top: clamp(32px, 4vw, 56px);
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  color: var(--muted-2);
  font-size: 0.85rem;
}

.footer__socials {
  display: flex;
  gap: 0.6rem;
}

.footer__socials a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  transition: var(--t-fast);
}

.footer__socials a:hover {
  color: #0b1414;
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- Generic grids ---------- */
.grid {
  display: grid;
  gap: clamp(20px, 2.4vw, 32px);
}

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

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.split-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav__links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 20, 20, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--gut) 1.2rem;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: var(--t-med);
  }

  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__links a {
    padding: 0.85rem 0.6rem;
    border-bottom: 1px solid var(--line-soft);
    font-size: 1rem;
  }

  .nav__links a.is-active::after {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .split,
  .split-head {
    grid-template-columns: 1fr;
  }

  .split__right,
  .split-head__visual {
    min-height: 300px;
    border-left: none;
    border-top: 1px solid var(--line-soft);
    order: -1;
  }

  .split-2 {
    grid-template-columns: 1fr;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }
}