/* ============================================================
   PHP Everyday - Workbench Magazine Theme
   Custom design: paper-like backgrounds, editor-style code blocks,
   developer-focused layout with series rails.
   ============================================================ */

/* --- Reset & base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #f5f3ef;
  --color-bg-paper: #fffef9;
  --color-bg-dark: #2b2d31;
  --color-text: #2c2c2c;
  --color-text-muted: #6b6b6b;
  --color-text-light: #999;
  --color-accent: #3b6daa;
  --color-accent-hover: #2a5690;
  --color-code-bg: #1e1e2e;
  --color-code-text: #cdd6f4;
  --color-gotcha: #d35400;
  --color-safer: #27ae60;
  --color-version: #8e44ad;
  --color-border: #ddd8cf;
  --color-border-light: #eae6de;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "Source Code Pro", "Cascadia Code", "Fira Code", Consolas, monospace;
  --max-width: 1320px;
  --rail-width: 220px;
  --content-width: 720px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    linear-gradient(rgba(180,175,165,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180,175,165,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); line-height: 1.3; color: var(--color-text); }
h1 { font-size: 2rem; margin-bottom: 0.5em; }
h2 { font-size: 1.5rem; margin: 1.8em 0 0.6em; }
h3 { font-size: 1.2rem; margin: 1.5em 0 0.5em; }
p { margin-bottom: 1em; }
ul, ol { margin: 0 0 1em 1.5em; }
li { margin-bottom: 0.3em; }

/* --- Header --- */
.site-header {
  background: var(--color-bg-paper);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 1rem;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  background: var(--color-code-bg);
  padding: 2px 8px;
  border-radius: 4px;
  color: #89b4fa;
}
.logo-text {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}
.main-nav { flex: 1; }
.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.2rem;
}
.nav-list a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 6px;
  text-decoration: none;
}
.nav-list a:hover { background: var(--color-border-light); color: var(--color-accent); text-decoration: none; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle-bar { display: block; width: 22px; height: 2px; background: var(--color-text); margin: 4px 0; transition: 0.2s; }
.search-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.search-toggle:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* --- Search overlay --- */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}
.search-overlay[hidden] { display: none; }
.search-overlay-inner {
  background: var(--color-bg-paper);
  border-radius: 12px;
  width: 90%;
  max-width: 640px;
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.search-close {
  float: right;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}
.search-box input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1.1rem;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-body);
  outline: none;
}
.search-box input:focus { border-color: var(--color-accent); }
.search-results { margin-top: 1rem; max-height: 50vh; overflow-y: auto; }
.search-results a {
  display: block;
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  color: var(--color-text);
}
.search-results a:hover { background: var(--color-border-light); text-decoration: none; }
.search-results .search-result-title { font-weight: 600; }
.search-results .search-result-excerpt { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 2px; }

/* --- Site main --- */
.site-main { min-height: calc(100vh - 56px - 120px); }

/* --- Home layout --- */
.home-hero {
  background: var(--color-bg-dark);
  color: #eee;
  padding: 4rem 1.5rem;
  text-align: center;
}
.hero-inner { max-width: 680px; margin: 0 auto; }
.home-hero h1 {
  font-size: 2.4rem;
  color: #fff;
  margin-bottom: 0.4em;
}
.hero-sub { color: #bbb; font-size: 1.15rem; margin-bottom: 1.5rem; }
.hero-search input {
  width: 100%;
  max-width: 520px;
  padding: 0.85rem 1.2rem;
  font-size: 1rem;
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-family: var(--font-body);
  outline: none;
}
.hero-search input::placeholder { color: rgba(255,255,255,0.4); }
.hero-search input:focus { border-color: var(--color-accent); background: rgba(255,255,255,0.12); }

.home-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.home-section + .home-section { border-top: 1px solid var(--color-border-light); }
.section-intro { color: var(--color-text-muted); margin-bottom: 1.5rem; }
.section-more { margin-top: 1rem; }

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.series-card, .pack-card {
  display: block;
  background: var(--color-bg-paper);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.series-card:hover, .pack-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(59,109,170,0.1);
  text-decoration: none;
}
.series-card h3, .pack-card h3 { font-size: 1.05rem; margin-bottom: 0.3em; color: var(--color-accent); }
.series-card p, .pack-card p { font-size: 0.9rem; color: var(--color-text-muted); margin: 0; }
.card-icon { font-size: 1.5rem; display: block; margin-bottom: 0.4rem; }

/* Guide list */
.guide-list, .update-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.guide-list li, .update-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border-light);
}
.guide-list li:last-child, .update-list li:last-child { border-bottom: 0; }
.update-list li { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; }
.update-date { font-size: 0.82rem; color: var(--color-text-light); }

/* --- Article layout (3-column) --- */
.article-layout-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr) var(--rail-width);
  gap: 2rem;
}

/* Left rail */
.left-rail, .right-rail { font-size: 0.88rem; }
.rail-sticky { position: sticky; top: 72px; }
.rail-heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}
.series-nav ul { list-style: none; margin: 0; padding: 0; }
.series-nav li a {
  display: block;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.85rem;
}
.series-nav li a:hover { background: var(--color-border-light); text-decoration: none; }
.series-nav li a.active { background: var(--color-accent); color: #fff; }

.series-progress { margin-top: 1.5rem; }
.series-progress h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-light); margin-bottom: 0.5rem; }
.series-toc { margin: 0; padding-left: 1.2em; font-size: 0.82rem; }
.series-toc li { margin-bottom: 0.35rem; }
.series-toc li.current { color: var(--color-accent); font-weight: 600; }

/* Article main */
.article-main { min-width: 0; }
.article-header { margin-bottom: 1.5rem; }
.article-series-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: rgba(59,109,170,0.08);
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.article-description { font-size: 1.1rem; color: var(--color-text-muted); }
.article-hero img { border-radius: 8px; margin-bottom: 1.5rem; }
.article-content { line-height: 1.7; }
.article-content h2 { border-bottom: 1px solid var(--color-border-light); padding-bottom: 0.3em; }

/* Right rail notes */
.note-card {
  background: var(--color-bg-paper);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.9rem;
  margin-bottom: 1rem;
}
.note-card h4 {
  font-family: var(--font-body);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}
.note-card p, .note-card li { font-size: 0.84rem; color: var(--color-text-muted); margin-bottom: 0; }
.note-card ul { margin: 0.3rem 0 0 1rem; }
.note-card.gotcha { border-left: 3px solid var(--color-gotcha); }
.note-card.gotcha h4 { color: var(--color-gotcha); }
.note-card.safer { border-left: 3px solid var(--color-safer); }
.note-card.safer h4 { color: var(--color-safer); }
.note-card.version { border-left: 3px solid var(--color-version); }
.note-card.version h4 { color: var(--color-version); }
.note-card.snippet pre {
  background: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 0.5rem;
  border-radius: 5px;
  font-size: 0.78rem;
  overflow-x: auto;
}

/* Code blocks - editor pane style */
.article-content pre, .page-content pre, .pack-content pre, .hub-content pre {
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1.2em 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  position: relative;
}
.article-content code, .page-content code, .pack-content code, .hub-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.article-content p code, .page-content p code, .pack-content p code, .hub-content p code,
.article-content li code, .page-content li code {
  background: rgba(59,109,170,0.08);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.85em;
}

/* Code block copy button */
.code-block-wrapper { position: relative; }
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.5);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: 0.15s;
}
.code-copy-btn:hover { background: rgba(255,255,255,0.2); color: #fff; }
.code-copy-btn.copied { color: var(--color-safer); border-color: var(--color-safer); }

/* Code filename label */
.code-filename {
  display: inline-block;
  background: #383a42;
  color: #abb2bf;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 6px 6px 0 0;
  margin-bottom: -4px;
}

/* Callouts (Gotcha, Safer Option, Why this breaks) */
.callout {
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1.5em 0;
  border-left: 4px solid;
}
.callout-title {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}
.callout-gotcha { border-color: var(--color-gotcha); background: rgba(211,84,0,0.05); }
.callout-gotcha .callout-title { color: var(--color-gotcha); }
.callout-safer { border-color: var(--color-safer); background: rgba(39,174,96,0.05); }
.callout-safer .callout-title { color: var(--color-safer); }
.callout-break { border-color: #c0392b; background: rgba(192,57,43,0.05); }
.callout-break .callout-title { color: #c0392b; }

/* FAQ toggle */
.faq-section { margin: 2em 0; }
.faq-item { border-bottom: 1px solid var(--color-border-light); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
}
.faq-question::after { content: "+"; font-size: 1.2rem; color: var(--color-text-muted); transition: 0.2s; }
.faq-question[aria-expanded="true"]::after { content: "-"; }
.faq-answer { padding: 0 0 1rem; display: none; }
.faq-answer.open { display: block; }

/* Related series */
.related-series { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.related-list { list-style: none; margin: 0; padding: 0; }
.related-list li { padding: 0.4rem 0; }

/* --- Pack layout --- */
.pack-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
.pack-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--color-accent);
  padding: 3px 12px;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}
.pack-hero img { border-radius: 8px; margin-bottom: 1.5rem; }
.step-list { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.step-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border-light);
}
.step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
}
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li {
  padding: 0.4rem 0 0.4rem 1.5rem;
  position: relative;
}
.checklist li::before {
  content: "\\2610";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* --- Hub layout --- */
.hub-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
.hub-hero img { border-radius: 8px; margin-bottom: 1.5rem; }

/* Hub content: filter UI styling */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.filter-btn {
  background: var(--color-bg-paper);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--color-text);
  transition: 0.15s;
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(59,109,170,0.06);
}

/* --- Page layout --- */
.page-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
.page-hero img { border-radius: 8px; margin-bottom: 1.5rem; }

/* --- Error page --- */
.error-page { text-align: center; padding: 4rem 1.5rem; }
.error-inner { max-width: 560px; margin: 0 auto; }
.error-code {
  font-family: var(--font-mono);
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 0.2em;
}
.error-links { text-align: left; margin: 2rem 0; }
.error-links ul { list-style: none; padding: 0; }
.error-links li { padding: 0.35rem 0; }
.error-search input {
  width: 100%;
  max-width: 400px;
  padding: 0.65rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-body);
}
.error-search input:focus { border-color: var(--color-accent); outline: none; }

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-dark);
  color: #aaa;
  padding: 2rem 1.5rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}
.footer-nav { margin-bottom: 1rem; }
.footer-nav a {
  color: #ccc;
  margin: 0 0.75rem;
  font-size: 0.9rem;
}
.footer-nav a:hover { color: #fff; }
.footer-copy { font-size: 0.8rem; color: #777; margin: 0; }

/* --- Responsive --- */
@media (max-width: 960px) {
  .article-layout-inner {
    grid-template-columns: 1fr;
  }
  .left-rail {
    order: 2;
    border-top: 1px solid var(--color-border-light);
    padding-top: 1.5rem;
  }
  .left-rail .rail-sticky { position: static; }
  .article-main { order: 1; }
  .right-rail {
    order: 3;
    border-top: 1px solid var(--color-border-light);
    padding-top: 1.5rem;
  }
  .right-rail .rail-sticky { position: static; }
}

@media (max-width: 700px) {
  .nav-list { display: none; }
  .nav-list.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-bg-paper);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  }
  .nav-toggle { display: block; }
  .home-hero h1 { font-size: 1.8rem; }
  .home-hero { padding: 2.5rem 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  h1 { font-size: 1.6rem; }
}

/* --- Utility --- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }