/* ============================================================
   AffMail — Hugo theme stylesheet
   Cool dark-first design for affiliate software content
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  --bg: #0a0e1a;
  --bg-elev: #0f1526;
  --surface: #121a2e;
  --surface-2: #182238;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.24);
  --text: #e6ebf4;
  --text-muted: #9aa7bd;
  --text-soft: #6b7690;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #22d3ee;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #22d3ee 100%);
  --gradient-soft: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(139, 92, 246, 0.18), rgba(34, 211, 238, 0.18));
  --header-bg: rgba(10, 14, 26, 0.82);
  --glow: 0 0 0 1px rgba(99, 102, 241, 0.35), 0 10px 40px -12px rgba(99, 102, 241, 0.5);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.65);
  --radius: 16px;
  --radius-sm: 10px;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --container: 1180px;
}

[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef1f7;
  --border: rgba(15, 23, 42, 0.10);
  --border-strong: rgba(15, 23, 42, 0.18);
  --text: #0f172a;
  --text-muted: #566078;
  --text-soft: #8b94a8;
  --header-bg: rgba(245, 247, 251, 0.85);
  --gradient-soft: linear-gradient(135deg, rgba(99, 102, 241, 0.10), rgba(139, 92, 246, 0.10), rgba(34, 211, 238, 0.12));
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 24px 60px -24px rgba(15, 23, 42, 0.25);
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 100% -10%, rgba(99, 102, 241, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 0%, rgba(34, 211, 238, 0.08), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.25s ease, color 0.25s ease;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent-3); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--text);
  margin: 0 0 0.6em;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

/* ---------- Layout utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: var(--gradient);
  box-shadow: var(--glow);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(99,102,241,0.5), 0 16px 40px -12px rgba(99,102,241,0.7); }

.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border-strong);
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--accent-3);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.badge:hover { border-color: var(--accent); color: var(--accent-3); }
.badge-lg { font-size: 13px; padding: 6px 14px; }

/* ---------- Section scaffolding ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-elev); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}
.section-title { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0; }
.section-link { font-weight: 600; font-size: 15px; white-space: nowrap; }

.empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 48px 0;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 68px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
}
.brand:hover { color: var(--text); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  box-shadow: var(--glow);
}
.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 15px;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a.active { color: var(--text); background: var(--gradient-soft); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle,
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.theme-toggle:hover,
.menu-toggle:hover { border-color: var(--accent); transform: translateY(-1px); }

.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.menu-toggle { display: none; flex-direction: column; gap: 4px; }
.menu-toggle span { display: block; width: 18px; height: 2px; border-radius: 2px; background: currentColor; }

/* ---------- Reading progress ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  background: transparent;
  pointer-events: none;
}
.reading-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gradient);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.15s ease;
  box-shadow: var(--shadow-lg);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.back-to-top:hover { border-color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 80px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-3);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  max-width: 820px;
  margin: 0 auto 20px;
  letter-spacing: -0.02em;
}
.hero-subtitle {
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--text-muted);
  font-size: 17px;
}
.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- Post grid & cards ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease;
}
.post-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.post-card-media {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-2);
}
.post-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.post-card:hover .post-card-media img { transform: scale(1.05); }
.post-card-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient);
}
.post-card-body { display: flex; flex-direction: column; gap: 12px; padding: 20px; flex: 1; }
.post-card-top { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.post-card-date { font-size: 12.5px; color: var(--text-soft); }
.post-card-title { font-size: 1.15rem; margin: 0; line-height: 1.35; }
.post-card-title a { color: var(--text); }
.post-card-title a:hover { color: var(--accent-3); }
.post-card-summary { margin: 0; color: var(--text-muted); font-size: 14.5px; flex: 1; }
.post-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.read-time { font-size: 12.5px; color: var(--text-soft); }
.read-more { font-size: 14px; font-weight: 600; }

/* ---------- Category cards ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.category-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
}
.category-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow-lg); }
.category-card-name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; color: var(--text); }
.category-card-count { font-size: 13.5px; color: var(--text-muted); }

/* ---------- Page header (list/taxonomy) ---------- */
.page-header { padding: 64px 0 40px; }
.page-header-sm { padding: 40px 0 32px; }
.page-title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 10px; letter-spacing: -0.02em; }
.page-subtitle { color: var(--text-muted); font-size: 16px; max-width: 640px; margin: 0; }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--accent-3); }
.breadcrumbs .sep { color: var(--text-soft); }
.breadcrumbs .current { color: var(--text); }

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 40px 0 8px;
}
.page-link {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}
.page-link:hover { border-color: var(--accent); color: var(--text); }
.page-info { color: var(--text-muted); font-size: 14px; }

/* ---------- Article (single) ---------- */
.article-hero { padding: 56px 0 40px; }
.article-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.article-title {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  max-width: 860px;
}
.article-subtitle { color: var(--text-muted); font-size: 18px; max-width: 760px; margin-bottom: 22px; }
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-muted);
  font-size: 14px;
}
.meta-item { display: inline-flex; align-items: center; gap: 7px; }
.meta-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--text-soft); }
.article-featured {
  margin: 0 0 40px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.article-featured img { width: 100%; object-fit: cover; }

.article-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 40px;
  padding-bottom: 64px;
}
.article-layout-full { grid-template-columns: minmax(0, 1fr); }
.article-sidebar-sticky { position: sticky; top: 92px; }
.article-body { min-width: 0; }

/* ---------- Prose (rendered markdown) ---------- */
.prose { max-width: 720px; font-size: 16.5px; }
.prose h2 {
  font-size: 1.7rem;
  margin-top: 2.2em;
  padding-top: 0.6em;
  border-top: 1px solid var(--border);
}
.prose h3 { font-size: 1.35rem; margin-top: 1.8em; }
.prose p { color: var(--text); }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose ul, .prose ol { padding-left: 1.4em; margin: 0 0 1.2em; }
.prose li { margin-bottom: 0.4em; }
.prose strong { color: var(--text); font-weight: 700; }
.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 20px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
}
.prose img { border-radius: var(--radius); }
.prose code {
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Code", monospace;
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.prose pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  overflow-x: auto;
}
.prose pre code { background: transparent; border: 0; padding: 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.prose th { background: var(--surface-2); }

/* ---------- Table of contents ---------- */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.toc-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.toc nav ul { list-style: none; margin: 0; padding: 0; }
.toc nav li { margin: 0; }
.toc nav a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-left: 2px solid var(--border);
  padding-left: 12px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.toc nav a:hover { color: var(--accent-3); border-color: var(--accent); }
.toc nav ul ul { padding-left: 12px; }

/* ---------- FAQ ---------- */
.faq { margin-top: 48px; max-width: 720px; }
.faq-title { font-size: 1.6rem; margin-bottom: 20px; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-item[open] { border-color: var(--border-strong); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--text);
  list-style: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: "+";
  flex-shrink: 0;
  font-size: 20px;
  color: var(--accent-3);
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-question::after { transform: rotate(45deg); }
.faq-answer { padding: 0 20px 18px; color: var(--text-muted); font-size: 15.5px; }

/* ---------- Article pager ---------- */
.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 48px;
  max-width: 720px;
}
.pager-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.pager-item:hover { border-color: var(--accent); transform: translateY(-2px); color: var(--text); }
.pager-item.next { text-align: right; }
.pager-item span { font-size: 13px; color: var(--accent-3); font-weight: 600; }
.pager-item strong { font-size: 14.5px; font-weight: 600; line-height: 1.4; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 56px 0 28px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand p { color: var(--text-muted); font-size: 15px; max-width: 360px; margin-top: 14px; }
.footer-col h4 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--text-muted); font-size: 15px; }
.footer-col a:hover { color: var(--accent-3); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  color: var(--text-soft);
  font-size: 13.5px;
}
.footer-bottom p { margin: 0; }

/* ---------- 404 ---------- */
.error { padding: 110px 0 130px; text-align: center; }
.error-code {
  font-family: var(--font-display);
  font-size: clamp(5rem, 18vw, 10rem);
  font-weight: 700;
  line-height: 1;
  margin: 0 0 8px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.error-title { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: 12px; }
.error-text { color: var(--text-muted); font-size: 17px; max-width: 460px; margin: 0 auto 30px; }
.error-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

/* ---------- Focus visibility ---------- */
:focus-visible { outline: 2px solid var(--accent-3); outline-offset: 2px; border-radius: 4px; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .post-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding-left: 18px; padding-right: 18px; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 48px 0; }
  .article-hero { padding: 40px 0 28px; }
  .article-pager { grid-template-columns: 1fr; }

  .menu-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--header-bg);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; padding: 12px 18px 18px; }
  .site-nav a { display: block; padding: 12px 14px; }
}