@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&display=swap');
/* Base */
:root {
  --bg: #f2f2f2;
  --fg: #000;
  --muted: #666;
  --brand: #223524; /* dark green accent (light mode hover) */
  --bg-darker: #cfcfcf; /* darker drawer background */
  --header-h: 56px; /* visible header height */
  --thumbs-h: 110px; /* thumbnails area height incl. padding */
  --gap: 20px; /* required margin on all sides */
  --viewer-pad-x: 24px; /* equal side breathing room from arrows */
  --viewer-pad-y: 16px; /* equal top/bottom breathing room */
  --drawer-gap: 10px; /* equal margins around thumbs drawer */
  --viewport-gap: 60px; /* distance from window edges */
  --viewer-reduce: 20px; /* reduce viewer height while keeping bottom fixed */
  --header-tint: rgba(128, 128, 128, 0.1); /* header background */
  --header-tint-0: rgba(128, 128, 128, 0);  /* transparent end */
  /* Issue slider background: light grey, slightly darker than header */
  --viewport-bg: #e5e5e5; /* issue slider background */
}

/* Dark theme variables */
html[data-theme="dark"] {
  --bg: rgb(20,20,20);
  --fg: #fff;
  --muted: #b7b7b7;
  --brand: #C6A62A; /* dark mode accent */
  --viewport-bg: rgb(10,10,10); /* issue slider background in dark */
  --header-tint: rgba(10,10,10,0.6); /* more transparency so blur shows */
  --header-tint-0: rgba(10,10,10,0);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Open Sans", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: var(--gap);
  padding-top: calc(var(--gap) + var(--header-h)); /* more on top for nav */
}
.viewer-page { overflow: hidden; padding: 0 !important; }

.visually-hidden { position: absolute !important; clip: rect(1px,1px,1px,1px); padding:0;border:0;height:1px;width:1px;overflow:hidden; }

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  /* Slight grey with ~90% transparency and background blur */
  background: var(--header-tint);
  backdrop-filter: blur(12px) saturate(120%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  display: flex;
  align-items: center;
  z-index: 10;
  padding: 0 var(--gap);
  border-bottom: none;
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -12px;
  height: 12px;
  background: linear-gradient(to bottom, var(--header-tint), var(--header-tint-0));
  pointer-events: none;
}
.header-inner { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; width: 100%; }
.nav { display: flex; gap: 16px; }
.nav-left { justify-content: flex-start; }
.nav-right { justify-content: flex-end; }
.nav a {
  text-decoration: none; color: var(--fg); opacity: 0.85;
  padding: 6px 10px; border-radius: 6px; transition: color .15s ease, opacity .15s ease, font-weight .15s ease;
}
.nav a.active, .nav a:hover { opacity: 1; font-weight: 700; color: var(--fg); background: none; }
.theme-toggle { width: 28px; height: 28px; display: grid; place-items: center; border: none; background: transparent; color: var(--fg); border-radius: 999px; cursor: pointer; padding: 0; }
.nav-logo { display: grid; place-items: center; text-decoration: none; color: inherit; }
.logo-img { height: 42px; width: auto; display: block; }
.logo-placeholder { display: none; width: 144px; height: 54px; border: 1px dashed rgba(0,0,0,0.3); border-radius: 6px; align-items: center; justify-content: center; font-size: 14px; color: var(--muted); padding: 0 10px; }
/* Generic chevron icon (SVG) */
.chevron { display: inline-block; width: 16px; height: 16px; transition: transform .2s ease; }
.chevron svg { width: 100%; height: 100%; stroke: currentColor; stroke-width: 2.5; fill: none; stroke-linecap: round; stroke-linejoin: round; }
/* Pages drawer toggle: up by default, down when drawer is active */
.chevron-up { transform: rotate(0deg); }
body:not(.thumbs-hidden) .chevron-up { transform: rotate(180deg); }

/* Header collapsed */
/* Header collapse controls removed */

/* Containers */
.container { max-width: 1200px; margin: 0 auto; }

/* Issues grid */
.issues-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.issue-card { display: block; text-decoration: none; color: inherit; }
.issue-cover-wrap { width: 100%; background: #ddd; border-radius: 6px; overflow: hidden; }
.issue-cover { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .25s ease; }
.issue-card:hover .issue-cover { transform: scale(1.04); }
.issue-title { margin-top: 8px; font-size: 18px; text-align: center; line-height: 1.3; transition: color .15s ease; display: inline-flex; gap: 6px; align-items: baseline; justify-content: center; width: 100%; }
.issue-card:hover .issue-title { color: var(--brand); }
.issue-title .issue-arc { display: inline; font-weight: 300; }
.issue-title .issue-cycle { display: inline; font-weight: 700; }

/* Viewer and sliders */
.viewer { position: relative; }
.viewer-viewport { position: fixed; left: var(--viewport-gap); right: var(--viewport-gap); top: calc(var(--viewport-gap) + var(--viewer-reduce)); bottom: var(--viewport-gap); background: var(--viewport-bg); display: flex; border-radius: 10px; overflow: hidden; }
.swiper.main { width: 100%; height: 100%; overflow: hidden; }
.swiper.main .swiper-wrapper { height: 100%; }
.swiper.main .swiper-slide { display: flex; align-items: center; justify-content: center; width: 100% !important; height: 100% !important; overflow: hidden; }
/* Strict contain within the slide box: never exceed width or height */
.swiper.main picture { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.swiper.main img { width: 100%; height: 100%; object-fit: contain; display: block; box-shadow: 0 6px 18px rgba(0,0,0,0.12); }

/* Thumbnails */
.thumbs-bar { display: flex; align-items: center; justify-content: flex-end; height: 32px; margin-top: 0; position: fixed; left: auto !important; right: var(--viewport-gap) !important; z-index: 12; bottom: calc(var(--drawer-gap) + 8px) !important; transition: bottom .2s ease; }
.thumbs-toggle { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.4); border: 1px solid rgba(0,0,0,0.15); padding: 4px 8px; border-radius: 999px; cursor: pointer; transition: background-color .15s ease; color: var(--fg); }
html[data-theme="dark"] .thumbs-toggle { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.18); }
.thumbs-toggle:hover { background: rgba(255,255,255,1); }
.thumbs { height: var(--thumbs-h); padding: var(--drawer-gap); padding-top: calc(var(--drawer-gap) + 10px); padding-bottom: calc(var(--drawer-gap) + 10px); box-sizing: border-box; background: rgba(255,255,255,0.75); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-radius: 0; position: fixed !important; left: 0 !important; right: 0 !important; top: auto !important; bottom: 0 !important; width: 100% !important; z-index: 11; transform: translateY(0); transition: transform .2s ease, opacity .2s ease; }
html[data-theme="dark"] .thumbs { background: rgba(0,0,0,0.55); }
.thumbs .swiper-slide { width: auto; display: flex; align-items: center; }
.thumbs .swiper-wrapper { padding-left: calc(var(--drawer-gap) + 20px); padding-right: calc(var(--drawer-gap) + 20px); }
.thumbs .thumb-item { display: flex; flex-direction: column; align-items: center; padding: 0 10px; }
.thumbs img { height: 72px; width: auto; display: block; border-radius: 4px; }
.thumbs .thumb-label { margin-top: 4px; font-size: 11px; line-height: 1; color: var(--muted); text-align: center; transition: color .15s ease; }
.thumbs::-webkit-scrollbar, .thumbs *::-webkit-scrollbar { display: none; }
.thumbs { scrollbar-width: none; }
.thumbs .thumb-item img { transition: filter .15s ease; }
.thumbs .thumb-item:hover img { filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4)); }
.thumbs .thumb-item:hover .thumb-label { color: var(--fg); }
/* Active thumb synced via Swiper's built-in class */
.thumbs .swiper-slide-thumb-active .thumb-item img { filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4)); }
.thumbs .swiper-slide-thumb-active .thumb-label { font-weight: 700; color: var(--brand); }
body.thumbs-hidden .thumbs { transform: translateY(100%); opacity: 0; pointer-events: none; }
body:not(.thumbs-hidden) .thumbs-bar { bottom: calc(var(--thumbs-h) + var(--drawer-gap) + 8px) !important; }

/* Overlay arrows for main slider */
.nav-arrow { position: fixed; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; border: none; background: transparent; cursor: pointer; z-index: 15; display: grid; place-items: center; padding: 0; color: var(--fg); opacity: 0.9; }
.nav-arrow.prev { left: 10px; }
.nav-arrow.next { right: 10px; }
.nav-arrow svg { width: 100%; height: 100%; stroke: currentColor; stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.nav-arrow.prev svg { transform: rotate(180deg); }
.nav-arrow.swiper-button-disabled { opacity: 0; pointer-events: none; }

/* Hover state for issue navigation arrows */
.nav-arrow { transition: color .15s ease; }
.nav-arrow:hover { color: var(--brand); }

/* About page */
.about { max-width: 720px; margin: 0 auto; text-align: center; }
.about h1 { font-weight: 400; }
.about-intro { font-size: 18px; line-height: 1.6; margin: 24px 0 36px 0; }
.qa { text-align: left; margin: 24px auto; max-width: 720px; }
.qa dt { font-weight: 700; margin-top: 18px; }
.qa dd { margin: 4px 0 12px 0; }
/* Extra spacing between FAQ blocks (between one answer and the next question) */
.qa dd + dt { margin-top: 28px; }

/* Center logo removed */

/* Responsive tweaks */
@media (max-width: 640px) {
  :root { --header-h: 48px; --thumbs-h: 116px; }
}