/*
Theme Name: OpenFact
Theme URI: https://example.com/openfact
Author: OpenFact
Author URI: https://example.com
Description: A lightweight, mobile-first WordPress theme for fact-checking and "did you know" style publications. Built around verified facts, short reads, and clear categorisation across Science, History, Geography, Animals & Nature and more.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Tested up to: 6.6
License: GNU General Public License v2 or later
License URI: LICENSE
Text Domain: openfact
Tags: blog, news, education, custom-colors, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready, one-column, two-columns, right-sidebar
*/

/* =========================================================
   OpenFact Design System
   Paper white background, verified-green primary accent,
   flag-orange secondary accent. Source Serif 4 for headlines,
   Inter for body/UI. Flat "index card" components — hairline
   borders, no drop shadows, small radius, a verified checkmark
   as the recurring visual motif.
   ========================================================= */

:root{
  /* Core palette */
  --paper: #FAFAF7;
  --paper-dim: #F2F0E8;
  --ink: #1C2B2E;
  --ink-soft: #4B5A5D;
  --line: #E4E1D8;
  --line-strong: #CFCABA;
  --verified: #2F6F4E;
  --verified-dim: #E7F0EA;
  --flag: #C24E2A;
  --flag-dim: #FBEAE2;
  --white: #FFFFFF;

  /* Category accents */
  --cat-animals: #2F6F4E;   /* forest green */
  --cat-arts: #7A4B8C;      /* plum */
  --cat-food: #B8792E;      /* ochre */
  --cat-geography: #2E6E8E; /* slate blue */
  --cat-history: #A2452B;   /* rust */
  --cat-science: #3D5A9C;   /* indigo */
  --cat-default: #4B5A5D;

  /* Type */
  --font-head: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Scale */
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: 2rem;
  --step-4: 2.6rem;

  --radius: 5px;
  --gutter: 20px;
  --max: 1120px;
}

*{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; height: auto; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
button{ font-family: inherit; cursor: pointer; }

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.screen-reader-text{
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(1px,1px,1px,1px);
}

h1,h2,h3,h4{
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 .5em;
}

/* -------------------- Verified mark -------------------- */
.mark{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--verified);
  color: #fff;
  font-size: 11px;
  flex: none;
}

/* -------------------- Category label -------------------- */
.cat{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: .78rem;
  font-weight: 600;
  color: var(--cat-c, var(--cat-default));
  letter-spacing: .01em;
}
.cat::before{
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cat-c, var(--cat-default));
}
.cat-animals-nature{ --cat-c: var(--cat-animals); }
.cat-arts-culture{ --cat-c: var(--cat-arts); }
.cat-food-drink{ --cat-c: var(--cat-food); }
.cat-geography{ --cat-c: var(--cat-geography); }
.cat-history{ --cat-c: var(--cat-history); }
.cat-science-technology{ --cat-c: var(--cat-science); }

/* -------------------- Header -------------------- */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,250,247,.94);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-branding{ display:flex; align-items:center; gap:.5rem; }
.site-title{
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
}
.site-title a{ display:flex; align-items:center; gap:.4rem; }
.custom-logo{ max-height: 34px; width: auto; }

.primary-nav{ display: none; }
.primary-nav ul{ display:flex; gap: 1.6rem; }
.primary-nav a{
  font-size: .92rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.primary-nav a:hover,
.primary-nav .current-menu-item > a{
  color: var(--verified);
  border-color: var(--verified);
}

.header-actions{ display:flex; align-items:center; gap: 10px; }
.icon-btn{
  width: 36px; height: 36px;
  display:flex; align-items:center; justify-content:center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
}
.subscribe-btn{
  display:none;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--verified);
  color: #fff;
  font-size: .85rem;
  font-weight: 700;
}
.menu-toggle{
  border: 1px solid var(--line);
  background: var(--white);
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items:center; justify-content:center;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after{
  content:""; display:block;
  width: 16px; height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform .2s ease, opacity .2s ease;
}
.menu-toggle span::before{ position:absolute; top:-5px; }
.menu-toggle span::after{ position:absolute; top:5px; }
.menu-toggle[aria-expanded="true"] span{ background: transparent; }
.menu-toggle[aria-expanded="true"] span::before{ top:0; transform: rotate(45deg); background: var(--ink); }
.menu-toggle[aria-expanded="true"] span::after{ top:0; transform: rotate(-45deg); background: var(--ink); }

/* -------------------- Mobile drawer -------------------- */
.mobile-drawer{
  position: fixed; inset: 64px 0 0 0;
  background: var(--paper);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  overflow-y: auto;
  z-index: 49;
}
.mobile-drawer.is-open{
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0);
}
.mobile-drawer .container{ padding-top: 22px; padding-bottom: 40px; }
.mobile-drawer ul{ display:flex; flex-direction:column; }
.mobile-drawer a{
  display:block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
}
.mobile-drawer .drawer-secondary a{
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-bottom: none;
  padding: 8px 0;
}

/* -------------------- Buttons / forms -------------------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--verified);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  border: none;
}
.newsletter-form{
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
}
.newsletter-form input[type="email"]{
  flex: 1 1 200px;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--white);
  font-size: .92rem;
  color: var(--ink);
}
.newsletter-form input[type="email"]:focus,
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--verified);
  outline-offset: 2px;
}

/* -------------------- Hero -------------------- */
.hero{
  padding: 28px 0 8px;
}
.hero-grid{
  display: grid;
  gap: 18px;
}
.hero-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}
.hero-card .hero-media{
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--paper-dim);
}
.hero-card .hero-media img{ width:100%; height:100%; object-fit: cover; }
.hero-card .hero-body{ padding: 16px 18px 20px; }
.hero-card h2{ font-size: var(--step-2); margin: .4em 0 .3em; }
.hero-card h2 a:hover{ color: var(--verified); }
.hero-card .excerpt{ color: var(--ink-soft); font-size: .95rem; }
.read-more{
  display:inline-flex; align-items:center; gap: 6px;
  margin-top: 10px;
  font-weight: 700; font-size: .85rem;
  color: var(--verified);
  border-bottom: 1px solid var(--verified);
  padding-bottom: 2px;
}

/* -------------------- Section headings -------------------- */
.section-head{
  display:flex; align-items:baseline; justify-content:space-between;
  margin: 40px 0 16px;
}
.section-head h3{ font-size: var(--step-2); margin:0; }
.section-head a{ font-size:.85rem; font-weight:700; color: var(--verified); }

/* -------------------- Fact grid / cards -------------------- */
.fact-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.fact-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.fact-card .fact-top{
  display:flex; align-items:center; justify-content:space-between; gap: 10px;
}
.fact-card .fact-text{
  font-family: var(--font-head);
  font-size: 1.05rem;
  line-height: 1.4;
}
.fact-card .fact-text a:hover{ color: var(--verified); }
.fact-card .fact-meta{
  display:flex; align-items:center; gap: 10px;
  font-size: .78rem; color: var(--ink-soft);
}
.fact-card .fact-media{
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--paper-dim);
}
.fact-card .fact-media img{ width:100%; height:100%; object-fit:cover; }

/* -------------------- Trending list -------------------- */
.trending{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 8px 18px;
}
.trending li{
  display:flex; gap: 14px; align-items:flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.trending li:last-child{ border-bottom:none; }
.trending .rank{
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--line-strong);
  width: 26px; flex: none;
}
.trending .t-body p{ margin: 4px 0 0; font-size: .95rem; }

/* -------------------- Newsletter CTA -------------------- */
.newsletter-cta{
  margin: 48px 0;
  padding: 34px var(--gutter);
  background: var(--verified);
  color: #fff;
  border-radius: var(--radius);
  text-align: left;
}
.newsletter-cta h3{ color:#fff; font-size: var(--step-3); margin-bottom:.25em; }
.newsletter-cta p{ color: #DCEEE3; margin: 0 0 18px; max-width: 46ch; }
.newsletter-cta .newsletter-form input[type="email"]{ border: none; }
.newsletter-cta .btn{ background: var(--ink); }

/* -------------------- Footer -------------------- */
.site-footer{
  border-top: 1px solid var(--line);
  margin-top: 50px;
  padding: 36px 0 26px;
  background: var(--paper-dim);
}
.footer-grid{
  display:grid; gap: 26px;
}
.footer-col h4{
  font-size: .8rem;
  text-transform: none;
  color: var(--ink-soft);
  margin-bottom: .8em;
  font-family: var(--font-body);
  font-weight: 700;
}
.footer-col ul li{ margin-bottom: 8px; }
.footer-col a{ font-size: .88rem; color: var(--ink-soft); }
.footer-col a:hover{ color: var(--verified); }
.footer-bottom{
  margin-top: 26px; padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: .8rem; color: var(--ink-soft);
  display:flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* -------------------- Single post -------------------- */
.single-wrap{ padding: 26px 0 50px; }
.single-header{ max-width: 70ch; margin: 0 auto 22px; }
.single-header h1{ font-size: var(--step-4); }
.single-meta{
  display:flex; align-items:center; gap: 12px;
  color: var(--ink-soft); font-size: .88rem; margin-top: 10px;
}
.single-thumb{
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 auto 26px;
  max-width: var(--max);
  aspect-ratio: 16/8;
}
.single-thumb img{ width:100%; height:100%; object-fit:cover; }
.entry-content{
  max-width: 70ch;
  margin: 0 auto;
  font-size: 1.05rem;
}
.entry-content p{ margin: 0 0 1.3em; }
.entry-content h2{ font-size: var(--step-2); margin-top: 1.6em; }
.entry-content h3{ font-size: var(--step-1); margin-top: 1.4em; }
.entry-content blockquote{
  margin: 1.6em 0; padding: 4px 0 4px 18px;
  border-left: 3px solid var(--verified);
  color: var(--ink-soft); font-style: italic;
}
.entry-content img{ border-radius: var(--radius); margin: 1.4em 0; }
.entry-content a{ color: var(--verified); border-bottom: 1px solid var(--verified); }
.entry-content ul, .entry-content ol{ margin: 0 0 1.3em; padding-left: 1.3em; }
.entry-content li{ margin-bottom: .4em; }

.tags-row{ max-width: 70ch; margin: 30px auto 0; display:flex; flex-wrap:wrap; gap:8px; }
.tags-row a{
  font-size: .78rem; font-weight:600;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft);
}

/* -------------------- Archive / search -------------------- */
.page-header{ padding: 30px 0 6px; }
.page-header h1{ font-size: var(--step-3); }
.page-header .cat{ margin-bottom: 8px; }
.page-header p.desc{ color: var(--ink-soft); max-width: 60ch; }

.pagination{
  display:flex; justify-content:center; gap: 8px;
  margin: 36px 0 10px;
}
.pagination a, .pagination span{
  min-width: 36px; height: 36px;
  display:flex; align-items:center; justify-content:center;
  border-radius: 50%;
  border: 1px solid var(--line);
  font-size: .85rem; font-weight:600;
}
.pagination .current{ background: var(--verified); color:#fff; border-color: var(--verified); }

/* -------------------- Search form -------------------- */
.search-form{ display:flex; gap:8px; }
.search-form input[type="search"]{
  flex:1; padding: 12px 16px; border-radius: 999px;
  border: 1px solid var(--line-strong); font-size: .95rem;
}
.search-form button{
  padding: 12px 18px; border-radius: 999px; border:none;
  background: var(--verified); color:#fff; font-weight:700;
}

/* -------------------- 404 -------------------- */
.error-404{ padding: 70px 0; text-align:center; }
.error-404 .mark{ width:56px; height:56px; font-size:1.6rem; margin: 0 auto 18px; }
.error-404 h1{ font-size: var(--step-3); }

/* -------------------- Widgets / sidebar -------------------- */
.widget{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 18px;
  margin-bottom: 18px;
}
.widget h2.widget-title{ font-size: 1rem; margin-bottom: .8em; }

/* -------------------- Responsive -------------------- */
@media (min-width: 700px){
  .hero-grid{ grid-template-columns: 1fr 1fr; }
  .fact-grid{ grid-template-columns: repeat(2, 1fr); }
  .footer-grid{ grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 960px){
  .primary-nav{ display:block; }
  .subscribe-btn{ display:inline-flex; }
  .menu-toggle{ display:none; }
  .fact-grid{ grid-template-columns: repeat(3, 1fr); }
  .footer-grid{ grid-template-columns: 2fr 1fr 1fr 1fr; }
  .newsletter-cta{ display:flex; align-items:center; justify-content:space-between; gap: 30px; }
  .newsletter-cta .newsletter-form{ width: 420px; flex: none; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}