/* ==========================================================================
   layout.css — header, footer, nav, page-level grids
   ========================================================================== */

/* reading progress */
.progress-bar { position: sticky; top: 64px; height: 2px; width: 100%; background: var(--color-border); z-index: 39; }
.progress-bar .fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--color-accent-deep), var(--color-accent-strong)); transition: width .1s linear; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(240, 239, 233, 0.88);
  backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--color-border);
}
.site-header .wrap { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-serif); font-size: 20px; font-weight: 800; color: var(--color-text); letter-spacing: -0.01em; }
.logo .mark { color: var(--color-accent); font-size: 15px; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a { position: relative; font-size: 14px; color: var(--color-text-muted); transition: color .15s ease; padding: 4px 0; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px; background: var(--color-accent); transform: scaleX(0); transition: transform .18s ease; }
.main-nav a:hover { color: var(--color-text); }
.main-nav a:hover::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.mobile-nav { display: none; border-bottom: 1px solid var(--color-border); background: var(--color-surface); }
.mobile-nav.open { display: block; }
.mobile-nav .wrap { flex-direction: column; align-items: stretch; height: auto; padding: 8px 24px 20px; gap: 4px; }
.mobile-nav a { padding: 14px 4px; font-size: 15px; color: var(--color-text-muted); border-bottom: 1px solid var(--color-border); min-height: 44px; display: flex; align-items: center; }
.mobile-nav a:last-child { border-bottom: none; }

/* footer */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 80px; }
.footer-grid { padding: 56px 0 40px; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 13.5px; color: var(--color-text-light); max-width: 280px; line-height: 1.7; }
.footer-col h5 { font-size: 12.5px; color: var(--color-text-light); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 14px; color: var(--color-text-muted); transition: color .15s ease; }
.footer-col a:hover { color: var(--color-accent-strong); }
.site-footer-legal { border-top: 1px solid var(--color-border); padding: 22px 0 40px; }
.site-footer-legal .wrap { display: flex; flex-direction: column; gap: 8px; }
.legal-info { font-size: 12px; color: var(--color-text-light); line-height: 1.8; }
.legal-info .copyright { color: var(--color-text-light); margin-top: 4px; }

/* article page layout */
.article-topbar { padding: 16px 0; border-bottom: 1px solid var(--color-border); }
.article-topbar .wrap-article { display: flex; align-items: center; justify-content: space-between; }
.back-link { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--color-text-muted); transition: color .15s ease; min-height: 44px; }
.back-link:hover { color: var(--color-accent-strong); }
.topbar-actions { display: flex; gap: 8px; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 13px;
  min-height: 40px;
  transition: color .15s ease, border-color .15s ease;
}
.icon-btn:hover { color: var(--color-text); border-color: var(--color-border-dark); }
.icon-btn.active { color: var(--color-accent-strong); border-color: rgba(122,36,54,0.35); }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; align-items: start; padding: 44px 0 0; }
.article-head { margin-bottom: 28px; }
.article-meta-top { font-family: var(--font-mono); font-size: 12.5px; color: var(--color-text-light); margin-bottom: 18px; letter-spacing: 0.02em; }
.article-head h1 { font-size: 40px; margin-bottom: 22px; }
.article-byline { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.article-byline .avatar { width: 42px; height: 42px; font-size: 14px; margin-bottom: 0; }
.article-byline .author-name { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.article-stats { margin-left: auto; display: flex; gap: 16px; font-family: var(--font-mono); font-size: 12.5px; color: var(--color-text-light); }
.article-stats span { display: inline-flex; align-items: center; gap: 5px; }

.cover-image {
  margin: 0 0 44px;
  aspect-ratio: 16/8;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(600px 240px at 20% 0%, rgba(122,36,54,0.10), transparent 60%),
    var(--color-paper);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cover-image svg { opacity: 0.7; }

/* sticky mobile subscribe bar */
.sticky-subscribe {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 45;
  background: rgba(240,239,233,0.94);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border);
  padding: 14px 20px calc(14px + var(--safe-bottom));
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transform: translateY(100%);
  transition: transform .25s ease;
}
.sticky-subscribe.show { transform: translateY(0); }
.sticky-subscribe .who { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--color-text-muted); }
.sticky-subscribe .who strong { color: var(--color-text); }

/* creator profile page */
.creator-banner {
  height: 200px;
  background:
    radial-gradient(700px 260px at 15% 20%, rgba(122,36,54,0.10), transparent 60%),
    var(--color-paper);
  border-bottom: 1px solid var(--color-border);
}
.creator-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 56px; align-items: start; }
.creator-profile-head { margin-top: -52px; padding-bottom: 32px; }
.creator-profile-head .avatar { width: 100px; height: 100px; font-size: 34px; box-shadow: 0 0 0 5px var(--color-background), 0 0 0 6px var(--color-border); }
.creator-profile-head h1 { font-size: 30px; margin: 18px 0 8px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.creator-profile-head .bio { color: var(--color-text-muted); max-width: 560px; margin-bottom: 22px; font-size: 15px; }
.creator-stats { display: flex; gap: 28px; margin-bottom: 4px; }
.creator-stats div { font-size: 13px; color: var(--color-text-light); }
.creator-stats strong { color: var(--color-text); font-size: 18px; display: block; font-family: var(--font-mono); font-weight: 600; }