/*
Theme Name: Different Measurements
Theme URI: https://differentmeasurements.com
Author: Different Measurements
Author URI: https://differentmeasurements.com
Description: A fast, lightweight, SEO-friendly WordPress theme built for Different Measurements — a unit conversion and measurement reference website. No page builders, no bloated frameworks: clean semantic HTML5, hand-written CSS and a handful of lines of vanilla JS.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: LICENSE
Text Domain: diffmeasure
Tags: blog, e-commerce, custom-colors, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* -------------------------------------------------------
   0. DESIGN TOKENS
------------------------------------------------------- */
:root{
  --color-primary:#2563eb;
  --color-primary-dark:#1d4ed8;
  --color-primary-light:#eff6ff;
  --color-text:#0f172a;
  --color-text-light:#64748b;
  --color-border:#e5e7eb;
  --color-white:#ffffff;
  --color-bg:#f8fafc;

  --color-green:#22c55e;
  --color-green-dark:#16a34a;
  --color-purple:#a855f7;
  --color-orange:#f97316;
  --color-teal:#14b8a6;
  --color-pink:#f43f5e;

  --color-footer-bg:#0b1324;
  --color-footer-text:#94a3b8;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm:6px;
  --radius-md:10px;
  --radius-lg:16px;
  --radius-full:999px;

  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 16px rgba(15,23,42,.08);
  --shadow-lg: 0 12px 32px rgba(15,23,42,.12);

  --container: 1200px;
}

/* -------------------------------------------------------
   1. RESET
------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  color:var(--color-text);
  background:var(--color-white);
  line-height:1.6;
  font-size:16px;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;}
a:hover{color:var(--color-primary-dark);}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,h6{margin:0 0 .5em;line-height:1.25;font-weight:700;color:var(--color-text);}
p{margin:0 0 1em;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
button{cursor:pointer;}
:focus-visible{outline:3px solid var(--color-primary);outline-offset:2px;}
.screen-reader-text{
  position:absolute!important;clip:rect(1px,1px,1px,1px);width:1px;height:1px;
  overflow:hidden;word-wrap:normal!important;
}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--color-primary);color:#fff;
  padding:10px 16px;z-index:10000;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

/* -------------------------------------------------------
   2. LAYOUT HELPERS
------------------------------------------------------- */
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:64px 0;}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:8px;}
.section-head h2{font-size:28px;margin:0;}
.view-all{font-weight:600;font-size:14px;white-space:nowrap;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;
  border:1px solid transparent;transition:background .15s ease,transform .1s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--color-primary);color:#fff;}
.btn-primary:hover{background:var(--color-primary-dark);color:#fff;}
.btn-green{background:var(--color-green);color:#fff;}
.btn-green:hover{background:var(--color-green-dark);color:#fff;}
.btn-outline{background:transparent;border-color:var(--color-border);color:var(--color-text);}

/* -------------------------------------------------------
   3. HEADER
------------------------------------------------------- */
.site-header{border-bottom:1px solid var(--color-border);position:sticky;top:0;background:#fff;z-index:999;}
.site-header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px;}
.site-branding{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.site-branding img.custom-logo{max-height:38px;width:auto;}
.site-branding .logo-icon{
  width:38px;height:38px;border-radius:50%;background:var(--color-primary-light);
  display:flex;align-items:center;justify-content:center;color:var(--color-primary);flex-shrink:0;
}
.site-title{font-size:18px;font-weight:800;line-height:1.15;color:var(--color-text);margin:0;}
.site-title span{display:block;color:var(--color-primary);}
.site-title a{color:inherit;}

.primary-navigation{flex:1;display:flex;justify-content:center;}
.primary-navigation ul{display:flex;gap:28px;align-items:center;}
.primary-navigation li{position:relative;}
.primary-navigation a{font-weight:600;font-size:15px;color:var(--color-text);}
.primary-navigation .current-menu-item > a,
.primary-navigation a:hover{color:var(--color-primary);}
.primary-navigation .menu-item-has-children > a::after{content:"";display:inline-block;margin-left:5px;border:5px solid transparent;border-top-color:currentColor;vertical-align:middle;}
.primary-navigation .sub-menu{
  position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--color-border);
  border-radius:var(--radius-md);box-shadow:var(--shadow-md);min-width:200px;padding:8px;
  opacity:0;visibility:hidden;transform:translateY(6px);transition:.15s ease;
}
.primary-navigation li:hover > .sub-menu,
.primary-navigation li:focus-within > .sub-menu{opacity:1;visibility:visible;transform:translateY(0);}
.primary-navigation .sub-menu a{display:block;padding:8px 10px;border-radius:var(--radius-sm);}
.primary-navigation .sub-menu a:hover{background:var(--color-primary-light);}

.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.header-icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--color-border);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--color-text);
}
.header-search-btn{border:none;background:transparent;color:var(--color-text);display:flex;}
.header-cta{background:var(--color-primary);color:#fff;padding:9px 18px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;display:flex;align-items:center;gap:6px;}
.header-cta:hover{background:var(--color-primary-dark);color:#fff;}
.menu-toggle{display:none;background:none;border:none;padding:8px;}

/* -------------------------------------------------------
   4. HERO
------------------------------------------------------- */
.hero{background:linear-gradient(180deg,var(--color-primary-light) 0%,#fbfdff 100%);}
.hero .container{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;padding-top:64px;padding-bottom:64px;}
.hero h1{font-size:44px;letter-spacing:-.02em;margin-bottom:18px;}
.hero h1 .accent{color:var(--color-primary);}
.hero p.lead{font-size:18px;color:var(--color-text-light);max-width:46ch;margin-bottom:26px;}
.hero-search{display:flex;gap:10px;background:#fff;padding:6px;border-radius:var(--radius-md);box-shadow:var(--shadow-md);border:1px solid var(--color-border);max-width:520px;}
.hero-search input[type="search"]{flex:1;border:none;padding:10px 14px;border-radius:var(--radius-sm);}
.hero-search input[type="search"]:focus{outline:none;}
.hero-search button{background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:0 20px;display:flex;align-items:center;}
.hero-search button:hover{background:var(--color-primary-dark);}
.popular-searches{margin-top:18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:14px;color:var(--color-text-light);}
.popular-searches a{
  background:#fff;border:1px solid var(--color-border);padding:6px 14px;border-radius:var(--radius-full);
  font-size:13px;color:var(--color-text);font-weight:500;
}
.popular-searches a:hover{border-color:var(--color-primary);color:var(--color-primary);}
.hero-media{position:relative;}
.hero-media img{margin:0 auto;}

/* -------------------------------------------------------
   5. CATEGORY GRID
------------------------------------------------------- */
.category-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;}
.category-card{
  border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:28px 18px;text-align:center;
  transition:box-shadow .15s ease, transform .15s ease;background:#fff;
}
.category-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.category-icon{
  width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  margin:0 auto 14px;color:#fff;
}
.category-card h3{font-size:16px;margin-bottom:6px;}
.category-card p{font-size:13px;color:var(--color-text-light);margin:0;}
.category-card a.card-link{color:inherit;display:block;}
.category-card a.card-link:hover h3{color:var(--color-primary);}

/* icon color variants, cycled */
.icon-0{background:var(--color-green);}
.icon-1{background:var(--color-primary);}
.icon-2{background:var(--color-purple);}
.icon-3{background:var(--color-orange);}
.icon-4{background:var(--color-teal);}
.icon-5{background:var(--color-pink);}

/* -------------------------------------------------------
   6. TWO-COLUMN: CONVERTERS + WHY US
------------------------------------------------------- */
.split-panels{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.panel{border-radius:var(--radius-lg);padding:32px;}
.panel-converters{background:#f0fdf4;border:1px solid #dcfce7;}
.panel-why{background:var(--color-primary-light);border:1px solid #dbeafe;}
.panel h3{font-size:19px;margin-bottom:18px;display:flex;align-items:center;gap:8px;}
.converter-list{display:flex;flex-direction:column;gap:6px;margin-bottom:20px;}
.converter-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fff;
  padding:12px 16px;border-radius:var(--radius-sm);font-weight:600;font-size:14.5px;color:var(--color-text);
  border:1px solid transparent;
}
.converter-list a:hover{border-color:var(--color-green);color:var(--color-green-dark);}
.why-list{display:flex;flex-direction:column;gap:12px;margin-bottom:22px;}
.why-list li{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;}
.why-list svg{flex-shrink:0;color:var(--color-primary);}
.panel-why img{margin-top:6px;}

/* -------------------------------------------------------
   7. LATEST ARTICLES
------------------------------------------------------- */
.article-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.article-card{border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;background:#fff;transition:box-shadow .15s ease;}
.article-card:hover{box-shadow:var(--shadow-md);}
.article-thumb{aspect-ratio:4/3;overflow:hidden;position:relative;background:var(--color-bg);}
.article-thumb img{width:100%;height:100%;object-fit:cover;}
.article-badge{
  position:absolute;top:12px;left:12px;background:rgba(15,23,42,.75);color:#fff;font-size:11px;
  font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:4px 10px;border-radius:var(--radius-full);
}
.article-body{padding:18px;}
.article-body h3{font-size:16px;margin-bottom:8px;}
.article-body h3 a{color:var(--color-text);}
.article-body h3 a:hover{color:var(--color-primary);}
.article-body p{font-size:13.5px;color:var(--color-text-light);margin-bottom:10px;}
.article-date{font-size:12px;color:#94a3b8;}

/* -------------------------------------------------------
   8. NEWSLETTER
------------------------------------------------------- */
.newsletter{background:var(--color-primary);color:#fff;}
.newsletter .container{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-top:36px;padding-bottom:36px;}
.newsletter-copy{display:flex;align-items:center;gap:16px;}
.newsletter-icon{width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.newsletter h3{margin:0 0 4px;font-size:18px;color:#fff;}
.newsletter p{margin:0;color:#dbeafe;font-size:14px;}
.newsletter-form{display:flex;gap:10px;flex:1;max-width:520px;}
.newsletter-form input[type="email"]{flex:1;border:none;border-radius:var(--radius-sm);padding:12px 16px;}
.newsletter-form button{background:#0f172a;color:#fff;border:none;border-radius:var(--radius-sm);padding:0 22px;font-weight:600;}
.newsletter-form button:hover{background:#1e293b;}

/* -------------------------------------------------------
   9. FOOTER
------------------------------------------------------- */
.site-footer{background:var(--color-footer-bg);color:var(--color-footer-text);padding:56px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:32px;}
.footer-brand .site-title{color:#fff;}
.footer-brand p{margin-top:12px;max-width:32ch;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.06);display:flex;align-items:center;
  justify-content:center;color:#fff;
}
.footer-social a:hover{background:var(--color-primary);}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:var(--color-footer-text);}
.footer-col a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding-top:20px;text-align:center;font-size:13px;color:#64748b;}

/* -------------------------------------------------------
   10. GENERIC CONTENT (pages, posts, archives, 404, search)
------------------------------------------------------- */
.page-header{padding:48px 0 8px;}
.page-header h1{font-size:32px;}
.entry-content{max-width:780px;}
.entry-content img{border-radius:var(--radius-md);}
.entry-content h2{font-size:24px;margin-top:1.6em;}
.entry-content h3{font-size:20px;margin-top:1.4em;}
.entry-content blockquote{border-left:3px solid var(--color-primary);margin:1.5em 0;padding:.4em 1.2em;color:var(--color-text-light);font-style:italic;}
.entry-content table{width:100%;border-collapse:collapse;margin:1.5em 0;}
.entry-content th,.entry-content td{border:1px solid var(--color-border);padding:10px 12px;text-align:left;}
.entry-meta{color:var(--color-text-light);font-size:14px;margin-bottom:24px;}
.posts-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:24px 0 64px;}
.pagination{display:flex;gap:8px;justify-content:center;padding:20px 0 60px;}
.pagination a,.pagination span{
  border:1px solid var(--color-border);padding:8px 14px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;
}
.pagination .current{background:var(--color-primary);color:#fff;border-color:var(--color-primary);}
.comments-area{max-width:780px;margin-top:48px;border-top:1px solid var(--color-border);padding-top:32px;}
.comment-list{list-style:none;margin:0 0 24px;padding:0;}
.comment-list .children{margin-left:32px;}
.comment-respond input,.comment-respond textarea{
  width:100%;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:10px 12px;margin-bottom:12px;
}
.search-form{display:flex;gap:8px;max-width:480px;margin:24px 0;}
.search-form input[type="search"]{flex:1;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:10px 14px;}
.search-form button{background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-sm);padding:0 18px;}
.error-404{text-align:center;padding:100px 0;}
.error-404 h1{font-size:96px;color:var(--color-primary-light);margin-bottom:0;}

/* -------------------------------------------------------
   11. RESPONSIVE
------------------------------------------------------- */
@media (max-width:1024px){
  .category-grid{grid-template-columns:repeat(3,1fr);}
  .split-panels{grid-template-columns:1fr;}
  .article-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .posts-list{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .primary-navigation{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--color-border);padding:12px 24px;}
  .primary-navigation.is-open{display:block;}
  .primary-navigation ul{flex-direction:column;align-items:flex-start;gap:4px;}
  .primary-navigation .sub-menu{position:static;box-shadow:none;opacity:1;visibility:visible;transform:none;display:none;border:none;padding-left:12px;}
  .primary-navigation li.open > .sub-menu{display:block;}
  .menu-toggle{display:flex;}
  .hero .container{grid-template-columns:1fr;padding-top:36px;padding-bottom:36px;}
  .hero-media{order:-1;max-width:320px;margin:0 auto;}
  .hero h1{font-size:32px;}
}
@media (max-width:640px){
  .category-grid{grid-template-columns:repeat(2,1fr);}
  .article-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .newsletter .container{flex-direction:column;align-items:flex-start;}
  .newsletter-form{max-width:100%;width:100%;flex-direction:column;}
  .section{padding:44px 0;}
  .posts-list{grid-template-columns:1fr;}
  .header-cta span{display:none;}
}