/* ═══════════════════════════════════════════════
   MUCHYI AI — LAYOUT
   layout.css
═══════════════════════════════════════════════ */

/* ══════════════
   CONTAINER
══════════════ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-sm { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.container-xs { max-width: 640px; margin: 0 auto; padding: 0 24px; }

/* ══════════════
   SECTIONS
══════════════ */
.section      { padding: 88px 0; }
.section-sm   { padding: 56px 0; }
.section-lg   { padding: 120px 0; }
.section-alt  { background: var(--ink1); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ══════════════
   TOPBAR
══════════════ */
.topbar {
  background: var(--ink1);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  font-size: .72rem; color: var(--text4);
  z-index: 200;
}
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.topbar-left  { display: flex; align-items: center; gap: 10px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.topbar-right a { color: var(--text3); transition: color var(--t); }
.topbar-right a:hover { color: var(--gold); }
.topbar-right .highlight { color: var(--gold); font-weight: 600; }
.topbar-dot { color: var(--text5); }

/* ══════════════
   HEADER
══════════════ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7,7,15,.88);
  backdrop-filter: blur(24px) saturate(1.3);
  border-bottom: 1px solid var(--border);
  transition: background .3s ease;
}
[data-theme="light"] .site-header { background: rgba(250,250,247,.9); }

.header-inner {
  display: flex; align-items: center; gap: 20px;
  height: var(--header-h);
}

/* ── Logo ── */
.site-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--gold-dk), var(--gold));
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-size: .9rem; font-weight: 900; color: #000;
  flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; gap: 1px; }
.logo-name { font-family: var(--font-head); font-size: 1.1rem; font-weight: 900; color: var(--text); line-height: 1; }
.logo-name .accent { color: var(--gold); }
.logo-tagline { font-size: .58rem; color: var(--text4); letter-spacing: .09em; text-transform: uppercase; }

/* ── Nav ── */
.nav-menu { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-link {
  padding: 7px 13px;
  font-size: .82rem; font-weight: 500;
  color: var(--text3);
  border-radius: var(--r);
  transition: all var(--t);
}
.nav-link:hover { color: var(--text); background: var(--ink2); }
.nav-link.active { color: var(--gold); background: var(--gold-pale); }
.nav-link.cta {
  background: var(--gold); color: #000 !important;
  font-weight: 700; padding: 8px 18px;
  margin-left: 4px;
}
.nav-link.cta:hover { background: var(--gold-lt); }

/* ── Header Actions ── */
.header-actions { display: flex; align-items: center; gap: 8px; }
.theme-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--ink2); border: 1px solid var(--border);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--t);
}
.theme-btn:hover { border-color: var(--gold-ring); }

/* ── Hamburger ── */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; width: 40px; height: 40px;
  align-items: center; justify-content: center;
}
.hamburger span {
  display: block; width: 20px; height: 2px;
  background: var(--text3); border-radius: 2px;
  transition: all .3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Menu ── */
.mobile-menu {
  display: none; flex-direction: column;
  background: var(--ink1);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
}
.mobile-menu.open { display: flex; }
.mobile-nav-link {
  padding: 12px 24px;
  font-size: .9rem; color: var(--text2);
  border-left: 3px solid transparent;
  transition: all var(--t);
}
.mobile-nav-link:hover,
.mobile-nav-link.active { color: var(--gold); border-left-color: var(--gold); background: var(--ink2); }
.mobile-nav-link.cta { color: var(--gold); font-weight: 700; }

/* ══════════════
   PAGE HERO (inner pages)
══════════════ */
.page-hero {
  background: linear-gradient(180deg, var(--ink1) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: 72px 0 56px;
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 70% at 50% 0%, var(--gold-glow), transparent);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: var(--text); margin-bottom: 16px; }
.page-hero p { font-size: 1.02rem; color: var(--text3); max-width: 56ch; line-height: 1.8; }

/* ── Breadcrumb ── */
.breadcrumb { padding: 12px 0; border-bottom: 1px solid var(--border); }
.breadcrumb-list { display: flex; align-items: center; gap: 8px; font-size: .75rem; color: var(--text4); }
.breadcrumb-list a { color: var(--text4); transition: color var(--t); }
.breadcrumb-list a:hover { color: var(--gold); }
.breadcrumb-sep { opacity: .4; }

/* ══════════════
   GRIDS
══════════════ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-auto-280 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.grid-auto-320 { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }

/* Content + Sidebar */
.content-grid { display: grid; grid-template-columns: 1fr 340px; gap: 56px; align-items: start; }
.sticky-sidebar { position: sticky; top: calc(var(--header-h) + 20px); display: flex; flex-direction: column; gap: 16px; }

/* ══════════════
   FOOTER
══════════════ */
.site-footer { background: var(--ink1); border-top: 1px solid var(--border); margin-top: 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding: 64px 0 48px;
}
.footer-brand p { font-size: .82rem; color: var(--text4); line-height: 1.75; margin: 14px 0 18px; }
.footer-col h5 {
  font-family: var(--font-head); font-size: .8rem; font-weight: 800;
  color: var(--text3); letter-spacing: .06em;
  text-transform: uppercase; margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 9px; }
.footer-col ul li a { font-size: .8rem; color: var(--text4); transition: color var(--t); }
.footer-col ul li a:hover { color: var(--gold); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; border-top: 1px solid var(--border);
  font-size: .74rem; color: var(--text5); flex-wrap: wrap; gap: 8px;
}
.footer-legal { display: flex; gap: 18px; }
.footer-legal a { color: var(--text5); transition: color var(--t); }
.footer-legal a:hover { color: var(--gold); }

/* ══════════════
   SIDEBAR WIDGETS
══════════════ */
.author-sidebar {
  background: var(--ink2);
  border: 1px solid var(--border);
  border-radius: var(--r3);
  overflow: hidden;
}
.author-sidebar-head {
  background: linear-gradient(135deg, var(--ink3), var(--ink2));
  border-bottom: 1px solid var(--border);
  padding: 24px;
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 6px;
}
.author-avatar {
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-dk), var(--gold));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-size: 1.1rem; font-weight: 900; color: #000;
  margin-bottom: 6px;
}
.author-sidebar-body { padding: 20px; }
.author-bio-short { font-size: .8rem; color: var(--text3); line-height: 1.7; margin-bottom: 16px; }

/* Widget Box */
.widget-box {
  background: var(--ink2);
  border: 1px solid var(--border);
  border-radius: var(--r3);
  padding: 20px;
}
.widget-title {
  font-size: .62rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .12em; color: var(--text5);
  margin-bottom: 14px;
}

/* ══════════════
   RESPONSIVE
══════════════ */
@media (max-width: 1024px) {
  .content-grid { grid-template-columns: 1fr 300px; gap: 40px; }
  .footer-grid  { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .grid-4       { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section    { padding: 60px 0; }
  .section-lg { padding: 80px 0; }
  .nav-menu   { display: none; }
  .hamburger  { display: flex; }
  .content-grid { grid-template-columns: 1fr; gap: 32px; }
  .sticky-sidebar { position: static; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .page-hero  { padding: 48px 0 40px; }
}

@media (max-width: 640px) {
  .container, .container-sm, .container-xs { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding: 40px 0 32px; }
  .topbar-right { display: none; }
}