/* style/layout.css */

/* ── SITE HEADER & NAV ─────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(30,30,30,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 2rem;
  max-width: var(--max-w);
  margin: 0 auto;
  gap: 2rem;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-0);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo:hover { text-decoration: none; color: #fff; }
.nav-logo-icon {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 800; color: #fff;
}
.nav-logo-img {
  height: 28px;
  width: auto;
  display: block;
}
.footer-logo-img {
  height: 22px;
  width: auto;
  display: block;
  opacity: 0.85;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-2);
  transition: color .2s;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--text-0); text-decoration: none; }
.nav-links a.active { color: #fff; border-bottom-color: var(--accent); }
.nav-links a.ai-link { color: var(--accent2); }
.nav-links a.ai-link:hover { color: #fff; }

.nav-lang {
  font-size: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color .2s;
  flex-shrink: 0;
  background: transparent;
}
.nav-lang:hover { border-color: var(--accent); color: var(--text-0); }
.nav-lang .lang-active { color: #fff; font-weight: 600; }

/* ── PRODUCT TAB BAR ───────────────────────────────────────── */
.tab-bar {
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  display: none;
}
body.has-tabs .tab-bar { display: block; }

.tab-bar-inner {
  display: flex;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-bar-inner::-webkit-scrollbar { display: none; }

.tab-bar a {
  padding: 10px 18px;
  font-size: 0.82rem;
  color: var(--text-2);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .2s, border-color .2s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.tab-bar a:hover { color: var(--text-0); }
.tab-bar a.active { color: #fff; border-bottom-color: var(--accent); }

/* ── PRODUCT SUB-TAB BAR ──────────────────────────────────── */
.sub-tab-bar {
  background: var(--bg-0);
  border-bottom: 1px solid var(--border);
  display: none;
}
body.has-tabs .sub-tab-bar { display: block; }

.sub-tab-bar-inner {
  display: flex;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.sub-tab-bar-inner::-webkit-scrollbar { display: none; }

.sub-tab-bar a {
  padding: 8px 14px;
  font-size: 0.75rem;
  color: var(--text-2);
  white-space: nowrap;
  transition: color .2s;
  text-decoration: none;
}
.sub-tab-bar a:hover { color: var(--text-0); }
.sub-tab-bar a.active { color: var(--accent2); font-weight: 600; }

/* ── HERO ──────────────────────────────────────────────────── */
.hero {
  min-height: 88vh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 20%,
      rgba(0,120,212,.13) 0%, transparent 70%),
    var(--bg-0);
  padding: 6rem 2rem 4rem;
}

.hero-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  text-align: center;
}

.hero h1 { color: #fff; margin-bottom: 1rem; }
.hero h1 span { color: var(--accent2); }

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-btns {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── BUTTONS ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .2s, transform .15s;
  text-decoration: none;
  border: none;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-outline  { background: transparent; color: var(--accent2); border: 1.5px solid var(--accent2); }

/* ── PAGE GRID (product pages) ─────────────────────────────── */
.page-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* ── BREADCRUMB ────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-2);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--text-0); text-decoration: none; }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-0); }

/* ── FOOTER ────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  margin-top: auto;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer-logo { font-weight: 700; font-size: 1rem; color: var(--text-0); }
.footer-links {
  display: flex; gap: 1.5rem; list-style: none; flex-wrap: wrap;
}
.footer-links a { font-size: 0.82rem; color: var(--text-2); }
.footer-links a:hover { color: var(--text-0); text-decoration: none; }
.footer-copy { font-size: 0.75rem; color: var(--text-2); }

/* ── MOBILE HAMBURGER ──────────────────────────────────────── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-0);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0; bottom: 0;
  background: var(--bg-1);
  z-index: 199;
  padding: 2rem;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 1rem 0;
  font-size: 1.1rem;
  color: var(--text-0);
  border-bottom: 1px solid var(--border);
  display: block;
}
.mobile-nav a.ai-link { color: var(--accent2); }