/*
Theme Name: PixelPostExpress
Theme URI: https://pixelpostexpress.com
Author: PixelPostExpress
Author URI: https://pixelpostexpress.com
Description: A premium Material Design Inspired WordPress theme for PixelPostExpress. White + Indigo Blue + Amber design system built entirely on elevation shadows (no borders/hairlines), with a floating action button for search, Material chip category filters, a horizontal scroll-snap carousel, and ripple-style hover/click feedback — structurally distinct from every bento, masonry, sidebar, or newspaper layout. Automatic relevant internal linking and full SEO / AEO / GEO optimization (JSON-LD schema + llms.txt) included.
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: pixelpost
Tags: education, material-design, custom-colors, custom-logo, custom-menu, featured-images, translation-ready, grid-layout, one-column

PixelPostExpress is a proprietary premium theme built specifically for a material-design-inspired authority portal.
*/

/* =========================================================
   0. DESIGN TOKENS
   ========================================================= */
:root{
  --white:       #FFFFFF;
  --surface:     #F7F7FB;
  --surface-2:   #EFEFF7;
  --indigo:      #3F51B5;
  --indigo-dark: #2E3D91;
  --indigo-light:#7986CB;
  --amber:       #FFC107;
  --amber-dark:  #E6A800;
  --ink:         #1B1B26;
  --grey:        #6B6B7A;

  --font-family: 'Rubik', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container: 1320px;

  /* Material elevation levels — shadows only, no borders anywhere */
  --el-1: 0 1px 3px rgba(27,27,38,.10), 0 1px 2px rgba(27,27,38,.08);
  --el-2: 0 3px 8px rgba(27,27,38,.12), 0 1px 3px rgba(27,27,38,.08);
  --el-3: 0 8px 20px rgba(27,27,38,.14), 0 2px 6px rgba(27,27,38,.08);
  --el-4: 0 16px 36px rgba(27,27,38,.18), 0 4px 10px rgba(27,27,38,.1);
}

/* =========================================================
   1. RESET / BASE
   ========================================================= */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--surface);color:var(--ink);
  font-family:var(--font-family);font-weight:400;font-size:16.5px;line-height:1.7;
  -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;}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-family);font-weight:600;line-height:1.2;
  letter-spacing:-.005em;margin:0 0 .5em;color:var(--ink);
}
p{margin:0 0 1.15em;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--indigo);outline-offset:2px;}
.screen-reader-text{position:absolute!important;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:56px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-family);font-weight:700;font-size:11px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--indigo);
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--amber);display:inline-block;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(24px,3vw,32px);margin:0;font-weight:600;}

/* Ripple effect (Material click feedback) */
.pp-ripple{position:relative;overflow:hidden;}
.pp-ripple-circle{
  position:absolute;border-radius:50%;background:rgba(255,255,255,.55);
  transform:scale(0);animation:pp-ripple-anim .55s ease-out;pointer-events:none;
}
@keyframes pp-ripple-anim{to{transform:scale(2.6);opacity:0;}}
.pp-ripple.is-dark .pp-ripple-circle{background:rgba(63,81,181,.18);}

/* =========================================================
   2. APP BAR HEADER (Material app bar, elevation, no borders)
   ========================================================= */
.pp-appbar{background:var(--white);box-shadow:var(--el-2);position:sticky;top:0;z-index:50;}
.pp-appbar-inner{max-width:var(--container);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:28px;}
.pp-logo{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.pp-logo img{height:42px;width:auto;display:block;}
.pp-logo-icon{height:40px;width:40px;flex:0 0 auto;display:block;}
.pp-logo-word{display:flex;flex-direction:column;line-height:1.05;}
.pp-logo-word strong{font-family:var(--font-family);font-weight:700;font-size:17px;color:var(--ink);}
.pp-logo-word small{font-family:var(--font-family);font-weight:600;font-size:9px;letter-spacing:.16em;color:var(--indigo);text-transform:uppercase;margin-top:1px;}
.pp-footer .pp-logo-word strong{color:var(--white);}
.pp-footer .pp-logo-word small{color:var(--amber);}

.pp-primary-nav{flex:1 1 auto;}
.pp-primary-nav ul{display:flex;gap:2px;justify-content:center;flex-wrap:wrap;}
.pp-primary-nav a{
  display:inline-block;font-family:var(--font-family);font-weight:500;font-size:13.5px;
  color:var(--ink);padding:10px 16px;border-radius:20px;transition:background .15s,color .15s;
}
.pp-primary-nav a:hover,.pp-primary-nav .current-menu-item a{background:var(--surface-2);color:var(--indigo);}

.pp-menu-toggle{display:none;width:40px;height:40px;border:none;background:var(--surface);border-radius:50%;align-items:center;justify-content:center;color:var(--ink);}

/* =========================================================
   3. FLOATING ACTION BUTTON — persistent search FAB (unique interaction)
   ========================================================= */
.pp-fab{
  position:fixed;bottom:28px;right:28px;z-index:80;
  width:58px;height:58px;border-radius:50%;background:var(--amber);color:var(--ink);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--el-4);border:none;
  transition:transform .2s ease,box-shadow .2s ease;
}
.pp-fab:hover{transform:scale(1.08);}
.pp-fab.is-open{background:var(--indigo);color:var(--white);}

.pp-search-sheet{
  position:fixed;bottom:0;left:0;right:0;z-index:79;background:var(--white);box-shadow:var(--el-4);
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:0;max-height:0;overflow:hidden;
  transition:max-height .3s ease;
}
.pp-search-sheet.is-open{max-height:160px;}
.pp-search-sheet-inner{max-width:640px;margin:0 auto;padding:28px 24px 34px;}
.pp-search-form{display:flex;background:var(--surface);border-radius:30px;overflow:hidden;box-shadow:var(--el-1);}
.pp-search-form input[type="search"]{flex:1;border:none;padding:14px 20px;font-size:16px;font-family:var(--font-family);background:transparent;color:var(--ink);}
.pp-search-form button{border:none;background:var(--indigo);color:var(--white);font-family:var(--font-family);font-weight:600;padding:0 26px;font-size:13px;letter-spacing:.02em;}
.pp-search-form button:hover{background:var(--indigo-dark);}
.pp-search-backdrop{position:fixed;inset:0;background:rgba(27,27,38,.35);z-index:78;opacity:0;visibility:hidden;transition:opacity .25s ease;}
.pp-search-backdrop.is-open{opacity:1;visibility:visible;}

/* =========================================================
   4. ELEVATED HERO CARD (Material surface, not full-bleed image)
   ========================================================= */
.pp-hero{padding:44px 0 8px;}
.pp-hero-card{
  background:linear-gradient(120deg,var(--indigo),var(--indigo-dark));
  border-radius:var(--radius-lg);box-shadow:var(--el-3);color:var(--white);
  padding:52px 48px;position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.3fr 1fr;gap:36px;align-items:center;
}
.pp-hero-card::before{
  content:"";position:absolute;top:-60px;right:-60px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.07);
}
.pp-hero-card::after{
  content:"";position:absolute;bottom:-90px;left:30%;width:220px;height:220px;border-radius:50%;
  background:rgba(255,193,7,.12);
}
.pp-hero-text{position:relative;z-index:1;}
.pp-hero-badge{display:inline-block;background:var(--amber);color:var(--ink);font-family:var(--font-family);font-weight:700;font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:6px 14px;border-radius:14px;margin-bottom:18px;}
.pp-hero-card h1{color:var(--white);font-size:clamp(28px,3.6vw,40px);margin-bottom:14px;}
.pp-hero-sub{color:rgba(255,255,255,.85);font-size:15.5px;max-width:480px;margin-bottom:24px;}
.pp-btn{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-family);font-weight:600;font-size:14px;
  background:var(--white);color:var(--indigo-dark);padding:13px 28px;border-radius:26px;border:none;box-shadow:var(--el-2);
}
.pp-btn:hover{box-shadow:var(--el-3);}

.pp-hero-media{position:relative;z-index:1;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--el-4);aspect-ratio:4/3;background:rgba(255,255,255,.12);}
.pp-hero-media img{width:100%;height:100%;object-fit:cover;}

/* =========================================================
   5. STAT CARDS (elevated mini-cards, not a dark strip)
   ========================================================= */
.pp-stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-34px;position:relative;z-index:2;}
.pp-stat-card{background:var(--white);border-radius:var(--radius-md);box-shadow:var(--el-2);padding:20px;text-align:center;}
.pp-stat-card strong{display:block;font-family:var(--font-family);font-weight:700;font-size:26px;color:var(--indigo);}
.pp-stat-card span{display:block;font-size:10.5px;color:var(--grey);text-transform:uppercase;letter-spacing:.06em;font-weight:600;margin-top:6px;}

/* =========================================================
   6. PILLAR CARDS
   ========================================================= */
.pp-pillars-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;}
.pp-pillar{background:var(--white);border-radius:var(--radius-md);box-shadow:var(--el-1);padding:20px 14px;text-align:center;transition:box-shadow .2s,transform .2s;}
.pp-pillar:hover{box-shadow:var(--el-3);transform:translateY(-3px);}
.pp-pillar-icon{width:42px;height:42px;border-radius:50%;background:var(--surface-2);display:flex;align-items:center;justify-content:center;color:var(--indigo);margin:0 auto 12px;}
.pp-pillar h3{font-size:13px;margin-bottom:2px;font-weight:600;}
.pp-pillar p{font-size:10.5px;color:var(--grey);margin:0;}

/* =========================================================
   7. CHIP FILTER + HORIZONTAL SCROLL-SNAP CAROUSEL
   ========================================================= */
.pp-chip-row{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;margin-bottom:24px;scrollbar-width:thin;}
.pp-chip-row::-webkit-scrollbar{height:6px;}
.pp-chip-row::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:10px;}
.pp-chip{
  flex:0 0 auto;font-family:var(--font-family);font-weight:600;font-size:13px;color:var(--ink);
  background:var(--white);box-shadow:var(--el-1);padding:9px 20px;border-radius:20px;white-space:nowrap;transition:box-shadow .15s,background .15s,color .15s;
}
.pp-chip:hover{box-shadow:var(--el-2);}
.pp-chip.is-active{background:var(--indigo);color:var(--white);}

.pp-carousel{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 6px 20px;margin:0 -6px;}
.pp-carousel::-webkit-scrollbar{height:8px;}
.pp-carousel::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:10px;}
.pp-carousel-item{flex:0 0 auto;width:300px;scroll-snap-align:start;}

/* =========================================================
   8. ELEVATED CARD (main grid + carousel + related — Material card)
   ========================================================= */
.pp-card{background:var(--white);border-radius:var(--radius-md);box-shadow:var(--el-1);overflow:hidden;display:flex;flex-direction:column;height:100%;transition:box-shadow .2s,transform .2s;}
.pp-card:hover{box-shadow:var(--el-3);transform:translateY(-3px);}
.pp-card-thumb{aspect-ratio:16/10;position:relative;overflow:hidden;background:var(--surface-2);}
.pp-card-thumb img{width:100%;height:100%;object-fit:cover;}
.pp-card-cat{position:absolute;top:12px;left:12px;background:var(--white);color:var(--indigo);font-family:var(--font-family);font-weight:700;font-size:10px;letter-spacing:.05em;text-transform:uppercase;padding:5px 11px;border-radius:14px;box-shadow:var(--el-1);}
.pp-card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.pp-card-body h3{font-size:16.5px;margin-bottom:8px;font-weight:600;}
.pp-card-body h3 a:hover{color:var(--indigo);}
.pp-card-excerpt{font-size:13.5px;color:var(--grey);margin-bottom:12px;flex:1;}
.pp-card-meta{font-size:10.5px;color:var(--grey);font-weight:600;text-transform:uppercase;letter-spacing:.03em;display:flex;gap:8px;align-items:center;}
.pp-card-meta .pp-dot{width:3px;height:3px;background:var(--grey);border-radius:50%;}

/* =========================================================
   9. MAIN GRID
   ========================================================= */
.pp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}

/* =========================================================
   10. OLDER POSTS
   ========================================================= */
.pp-pagination{display:flex;justify-content:center;margin-top:40px;}
.pp-older-posts{
  font-family:var(--font-family);font-weight:600;font-size:13.5px;
  background:var(--white);color:var(--indigo-dark);padding:14px 34px;border-radius:26px;box-shadow:var(--el-2);
}
.pp-older-posts:hover{box-shadow:var(--el-3);}

/* =========================================================
   11. SINGLE POST
   ========================================================= */
.pp-breadcrumbs{font-size:12px;color:var(--grey);margin-bottom:18px;}
.pp-breadcrumbs a:hover{color:var(--indigo);}
.pp-breadcrumbs span{margin:0 8px;}

.pp-article-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--el-2);padding:44px;max-width:900px;margin:0 auto;}
.pp-article-head{max-width:780px;margin:0 auto 26px;}
.pp-article-head h1{font-size:clamp(28px,4vw,40px);}
.pp-article-meta{
  display:flex;gap:14px;align-items:center;color:var(--grey);font-size:12px;font-weight:600;
  text-transform:uppercase;letter-spacing:.03em;margin-top:16px;padding-top:16px;
  box-shadow:inset 0 1px 0 var(--surface-2);
}
.pp-article-meta .pp-dot{width:3px;height:3px;background:var(--grey);border-radius:50%;}
.pp-article-thumb{max-width:780px;margin:0 auto 28px;border-radius:var(--radius-md);overflow:hidden;aspect-ratio:16/9;box-shadow:var(--el-2);}
.pp-article-thumb img{width:100%;height:100%;object-fit:cover;}
.pp-article-body{max-width:780px;margin:0 auto;font-size:17.5px;color:#26263A;}
.pp-article-body h2{font-size:25px;margin-top:1.6em;}
.pp-article-body h3{font-size:20px;margin-top:1.4em;}
.pp-article-body a{color:var(--indigo-dark);text-decoration:underline;text-decoration-color:var(--amber);text-underline-offset:3px;font-weight:600;}
.pp-article-body a:hover{color:var(--indigo);}
.pp-article-body img{border-radius:var(--radius-sm);margin:1.2em 0;}
.pp-article-body blockquote{
  background:var(--surface);border-radius:var(--radius-md);margin:1.8em 0;padding:18px 22px;
  font-style:italic;color:#2E2E42;font-size:19px;box-shadow:var(--el-1);
}
.pp-article-body ul,.pp-article-body ol{padding-left:1.4em;margin-bottom:1.2em;}
.pp-article-body li{margin-bottom:.4em;}

.pp-internal-links-group{
  background:var(--surface);border-radius:var(--radius-md);padding:16px 20px;margin:1.8em 0;font-size:14.5px;box-shadow:var(--el-1);
}
.pp-internal-links-group .pp-ilg-label{
  font-family:var(--font-family);font-weight:700;font-size:10.5px;text-transform:uppercase;
  letter-spacing:.1em;color:var(--indigo);display:block;margin-bottom:10px;
}
.pp-internal-links-group ul{display:flex;flex-direction:column;gap:7px;}
.pp-internal-links-group a{font-weight:600;color:var(--ink);text-decoration:none;}
.pp-internal-links-group a:hover{color:var(--indigo);text-decoration:underline;}

.pp-author-box{
  max-width:780px;margin:40px auto 0;padding:20px;border-radius:var(--radius-md);
  background:var(--surface);display:flex;gap:16px;align-items:center;box-shadow:var(--el-1);
}
.pp-author-box img{width:50px;height:50px;border-radius:50%;flex:0 0 auto;}
.pp-author-box strong{font-family:var(--font-family);font-weight:600;font-size:14px;color:var(--ink);display:block;}
.pp-author-box span{font-size:12px;color:var(--grey);}

/* =========================================================
   12. RELATED POSTS
   ========================================================= */
.pp-related{margin-top:48px;}
.pp-related-inner{max-width:1080px;margin:0 auto;padding:0 24px 56px;}
.pp-related h2{font-size:22px;margin-bottom:22px;}

/* =========================================================
   13. FOOTER
   ========================================================= */
.pp-footer{background:var(--indigo-dark);color:var(--white);margin-top:32px;}
.pp-footer-top{padding:48px 0 30px;}
.pp-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.pp-footer-brand p{color:rgba(255,255,255,.72);font-size:13.5px;margin-top:14px;max-width:280px;}
.pp-footer h4{color:var(--white);font-family:var(--font-family);font-weight:700;font-size:11.5px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px;}
.pp-footer ul li{margin-bottom:9px;}
.pp-footer a{color:rgba(255,255,255,.72);font-size:13.5px;}
.pp-footer a:hover{color:var(--amber);}
.pp-footer-bottom{
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);padding:18px 0;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
}
.pp-footer-bottom p{margin:0;font-size:12px;color:rgba(255,255,255,.65);}
.pp-footer-bottom ul{display:flex;gap:18px;}
.pp-footer-bottom a{font-size:12px;}

/* =========================================================
   14. ARCHIVE / SEARCH / 404 / STATIC
   ========================================================= */
.pp-page-header{padding:44px 0 8px;}
.pp-page-header-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--el-2);padding:36px 40px;}
.pp-page-header-card h1{font-size:clamp(24px,3.6vw,34px);margin-bottom:8px;}
.pp-page-header-card p{color:var(--grey);margin:0;max-width:640px;}

.pp-static-page{max-width:820px;margin:0 auto;padding:48px 24px;}
.pp-static-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--el-2);padding:44px;font-size:17px;}
.pp-static-card h1{font-size:clamp(26px,4vw,36px);margin-bottom:22px;}
.pp-static-card h2{font-size:21px;margin-top:1.6em;}

.pp-404{text-align:center;padding:20px 24px 80px;}
.pp-404-card{background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--el-2);padding:64px 24px;max-width:600px;margin:0 auto;}
.pp-404 .pp-404-code{font-family:var(--font-family);font-weight:700;font-size:88px;color:var(--indigo-light);line-height:1;}
.pp-404 h1{font-size:26px;}

/* =========================================================
   15. RESPONSIVE
   ========================================================= */
@media (max-width:1080px){
  .pp-hero-card{grid-template-columns:1fr;}
  .pp-hero-media{aspect-ratio:16/9;}
  .pp-pillars-grid{grid-template-columns:repeat(3,1fr);}
  .pp-grid{grid-template-columns:repeat(2,1fr);}
  .pp-stats-row{grid-template-columns:repeat(2,1fr);margin-top:20px;}
}
@media (max-width:860px){
  .pp-primary-nav{
    position:fixed;top:0;right:-300px;width:280px;height:100vh;background:var(--white);
    padding:96px 20px 20px;transition:right .25s ease;z-index:70;overflow-y:auto;box-shadow:var(--el-4);
  }
  .pp-primary-nav.is-open{right:0;}
  .pp-primary-nav ul{flex-direction:column;gap:2px;}
  .pp-primary-nav a{color:var(--ink);width:100%;padding:14px 12px;border-radius:10px;}
  .pp-menu-toggle{display:flex;}
  .pp-footer-grid{grid-template-columns:1fr 1fr;}
  .pp-fab{width:52px;height:52px;bottom:20px;right:20px;}
}
@media (max-width:640px){
  .pp-grid{grid-template-columns:1fr;}
  .pp-pillars-grid{grid-template-columns:repeat(2,1fr);}
  .pp-stats-row{grid-template-columns:repeat(2,1fr);}
  .pp-footer-grid{grid-template-columns:1fr;}
  .pp-hero-card{padding:36px 24px;}
  .pp-carousel-item{width:260px;}
  .section{padding:40px 0;}
}