/* === Sütlab — layout.css === */

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background-color var(--t-base), backdrop-filter var(--t-base), box-shadow var(--t-base);
}

.site-header.is-scrolled {
  background-color: rgba(27, 15, 8, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-text);
  z-index: 110;
}

.brand img {
  height: 44px;
  width: auto;
}

.brand-text {
  display: none;
  font-weight: 600;
  letter-spacing: 0.04em;
}

@media (min-width: 600px) {
  .brand-text { display: inline; }
}

/* nav (desktop) */
.main-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.main-nav a {
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  position: relative;
  transition: color var(--t-fast), background-color var(--t-fast);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--color-accent);
}

.main-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 18px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: translateX(-50%);
}

/* lang switch */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
}

.lang-switch a {
  color: var(--color-muted);
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  transition: color var(--t-fast), background-color var(--t-fast);
}

.lang-switch a.is-active {
  color: var(--color-bg);
  background: var(--color-accent);
}

.lang-switch a:not(.is-active):hover {
  color: var(--color-text);
}

.lang-divider {
  color: var(--color-border);
  font-weight: 300;
}

/* hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  margin: 0 auto;
  transition: transform var(--t-base), opacity var(--t-base);
}

.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .main-nav { display: flex; }
  .hamburger { display: none; }
}

/* mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-surface) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  z-index: 105;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--t-base), visibility var(--t-base), transform var(--t-base);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu a {
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 1.7rem;
  letter-spacing: 0.02em;
}

.mobile-menu a.is-active {
  color: var(--color-accent);
}

.mobile-menu .lang-switch {
  margin-top: 2rem;
  font-size: 1rem;
}

@media (min-width: 1024px) {
  .mobile-menu { display: none; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 3.5rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 3rem;
  }
}

.footer-brand img {
  height: 56px;
  margin-bottom: 1rem;
}

.footer-slogan {
  color: var(--color-muted);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  max-width: 320px;
  margin: 0;
}

.footer-title {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.footer-links li { margin-bottom: 0.6rem; }
.footer-links a {
  color: var(--color-text);
  font-size: 0.95rem;
}
.footer-links a:hover { color: var(--color-accent); }

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
}

.footer-social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ---------- Page header (for inner pages) ---------- */
.page-header {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  padding: 8rem 0 3rem;
  overflow: hidden;
  background: var(--color-surface);
}

.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--page-header-bg, url("../images/image00007.jpeg"));
  background-size: cover;
  background-position: center;
  filter: blur(6px) brightness(0.55);
  transform: scale(1.08);
  z-index: 0;
}

.page-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27, 15, 8, 0.4) 0%, rgba(27, 15, 8, 0.9) 100%);
  z-index: 1;
}

.page-header .container {
  position: relative;
  z-index: 2;
}

.page-header h1 {
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 3.75rem);
}

.page-header .breadcrumb {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

@media (min-width: 768px) {
  .page-header {
    min-height: 380px;
    padding: 10rem 0 4rem;
  }
}