/*
Theme Name: PadhoLikhoJEE Focus Theme
Theme URI: https://padholikhojee.in
Description: A premium, fast, standalone dark-mode theme designed for chemistry doubt resolution and PYQ solutions.
Version: 1.0.0
Author: Nishant Kumar Gupta
Author URI: https://padholikhojee.in
Text Domain: padholikhojee-theme
*/

/* ═══════════════════════════════════════════════
   PadhoLikhoJEE — Core Stylesheet
   Scientific Dark Theme · Glassmorphism
   ═══════════════════════════════════════════════ */

/* ── FONTS ── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

/* ── DESIGN TOKENS ── */
:root {
  --plj-bg:            #0B0F19; /* Pure dark navy background */
  --plj-bg-2:          #0F1524; /* Elevated container background */
  --plj-bg-3:          #161F33; /* Highlights / borders */
  --plj-surface:       rgba(255, 255, 255, 0.03);
  --plj-surface-2:     rgba(255, 255, 255, 0.06);
  --plj-border:        rgba(255, 255, 255, 0.08);
  --plj-border-2:      rgba(255, 255, 255, 0.15);
  --plj-cyan:          #06B6D4;
  --plj-cyan-hover:    #22D3EE;
  --plj-cyan-dim:      rgba(6, 182, 212, 0.12);
  --plj-cyan-border:   rgba(6, 182, 212, 0.25);
  --plj-orange:        #F97316;
  --plj-green:         #10B981;
  --plj-green-dim:     rgba(16, 185, 129, 0.10);
  --plj-yellow:        #F59E0B;
  --plj-red:           #EF4444;

  /* Physics (Indigo/Purple) */
  --plj-physics-primary:   #6366F1;
  --plj-physics-hover:     #818CF8;
  --plj-physics-dim:       rgba(99, 102, 241, 0.12);
  --plj-physics-border:    rgba(99, 102, 241, 0.25);

  /* Mathematics (Rose/Teal) */
  --plj-math-primary:      #F43F5E;
  --plj-math-hover:        #FB7185;
  --plj-math-dim:          rgba(244, 63, 94, 0.12);
  --plj-math-border:       rgba(244, 63, 94, 0.25);

  /* Chemistry (Cyan/Orange/Green mappings) */
  --plj-chem-primary:      var(--plj-cyan);
  --plj-chem-hover:        var(--plj-cyan-hover);
  --plj-chem-dim:          var(--plj-cyan-dim);
  --plj-chem-border:       var(--plj-cyan-border);
  
  /* Text colors */
  --plj-text:          #F1F5F9; /* High emphasis text */
  --plj-text-2:        #CBD5E1; /* Medium emphasis body text */
  --plj-text-3:        #94A3B8; /* Muted captions */
  --plj-text-4:        #64748B; /* Darker placeholder / border text */
  
  /* Layout utilities */
  --plj-radius:        12px;
  --plj-radius-sm:     8px;
  --plj-transition:    all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --plj-font-head:     'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --plj-font-body:     'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --plj-max-w:         1200px;  /* Optimal reading width for posts */
  --plj-nav-h:         60px;    /* Mobile navigation height */
}

/* ── BASE RESET ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  background-color: var(--plj-bg) !important;
  color: var(--plj-text-2) !important;
  font-family: var(--plj-font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: 70px; /* Keep bottom clear for mobile nav bar */
  min-height: 100%;
}

/* ── GLOBAL TYPOGRAPHY ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--plj-font-head);
  color: var(--plj-text);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

a {
  color: var(--plj-cyan);
  text-decoration: none;
  transition: var(--plj-transition);
}

a:hover {
  color: var(--plj-cyan-hover);
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--plj-radius);
  display: block;
}

/* ── LAYOUT WIDGETS ── */
.plj-site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.plj-main-content {
  flex-grow: 1;
  padding: 40px 20px;
}

.plj-container {
  max-width: var(--plj-max-w);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.plj-container--wide {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

/* ── STICKY TOP HEADER ── */
.plj-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--plj-border);
  height: 64px;
}

.plj-header .plj-container--wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 20px;
}

.plj-logo {
  font-family: var(--plj-font-head);
  font-weight: 800;
  font-size: 20px;
  color: var(--plj-text);
  letter-spacing: -0.5px;
  text-decoration: none !important;
}

.plj-logo span {
  color: var(--plj-cyan);
}

.plj-nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.plj-nav-menu a {
  color: var(--plj-text-2);
  font-family: var(--plj-font-head);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none !important;
}

.plj-nav-menu a:hover {
  color: var(--plj-cyan);
}

/* Header search widget */
.plj-header-search-form {
  position: relative;
  flex-grow: 1;
  max-width: 320px;
  margin: 0 24px;
}

.plj-header-search-form input[type="search"] {
  width: 100%;
  background: var(--plj-surface-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius-sm);
  color: var(--plj-text);
  padding: 8px 12px 8px 36px;
  font-family: var(--plj-font-body);
  font-size: 13px;
  outline: none;
  transition: var(--plj-transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 12px center;
}

.plj-header-search-form input[type="search"]:focus {
  border-color: var(--plj-cyan);
  background-color: rgba(6, 182, 212, 0.03);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

@media (max-width: 768px) {
  .plj-header-search-form, .plj-nav-menu {
    display: none; /* Hidden on mobile, handled by mobile bottom bar */
  }
}

/* ── HOMEPAGE HERO & GRID ── */
.plj-hero {
  text-align: center;
  padding: 60px 20px 40px;
}

.plj-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -1px;
}

.plj-hero h1 span {
  color: var(--plj-cyan);
}

.plj-hero-sub {
  color: var(--plj-text-3);
  font-size: 16px;
  max-width: 600px;
  margin: 12px auto 32px;
}

/* Home Finder Search */
.plj-finder {
  background: var(--plj-bg-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  padding: 24px;
  max-width: 640px;
  margin: 0 auto 48px;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
}

.plj-finder-input-wrapper {
  position: relative;
  margin-bottom: 16px;
}

.plj-finder-input-wrapper input {
  width: 100%;
  background: var(--plj-bg-3);
  border: 1.5px solid var(--plj-border);
  border-radius: var(--plj-radius-sm);
  color: var(--plj-text);
  font-size: 15px;
  padding: 14px 16px 14px 44px;
  outline: none;
  font-family: var(--plj-font-body);
  transition: var(--plj-transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 14px center;
}

.plj-finder-input-wrapper input:focus {
  border-color: var(--plj-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.plj-finder-filters {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.plj-filter-btn {
  background: var(--plj-bg-3);
  border: 1px solid var(--plj-border);
  color: var(--plj-text-2);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--plj-font-head);
  cursor: pointer;
  transition: var(--plj-transition);
}

.plj-filter-btn:hover, .plj-filter-btn.plj-active {
  background: var(--plj-cyan);
  color: #000000;
  border-color: var(--plj-cyan);
}

/* Home Grid cards */
.plj-chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.plj-chapter-card {
  background: var(--plj-bg-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  padding: 20px;
  text-decoration: none !important;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 140px;
  transition: var(--plj-transition);
}

.plj-chapter-card:hover {
  background-color: var(--plj-surface-2);
  transform: translateY(-2px);
}

.plj-chapter-card--physics:hover {
  border-color: var(--plj-physics-border);
  box-shadow: 0 8px 20px -8px rgba(99, 102, 241, 0.15);
}

.plj-chapter-card--math:hover {
  border-color: var(--plj-math-border);
  box-shadow: 0 8px 20px -8px rgba(244, 63, 94, 0.15);
}

.plj-chapter-card--chemistry:hover {
  border-color: var(--plj-cyan-border);
  box-shadow: 0 8px 20px -8px rgba(6, 182, 212, 0.15);
}

.plj-chapter-card__tag {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}

.plj-chapter-card__tag--physical  { color: var(--plj-cyan); }
.plj-chapter-card__tag--organic   { color: var(--plj-orange); }
.plj-chapter-card__tag--inorganic { color: var(--plj-green); }
.plj-chapter-card__tag--physics     { color: var(--plj-physics-primary); }
.plj-chapter-card__tag--chemistry   { color: var(--plj-chem-primary); }
.plj-chapter-card__tag--mathematics { color: var(--plj-math-primary); }

.plj-chapter-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--plj-text);
  margin-bottom: 12px;
}

.plj-chapter-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

.plj-chapter-card__badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--plj-surface-2);
  color: var(--plj-text-3);
}

.plj-chapter-card__badge--hard { background: rgba(239, 68, 68, 0.1); color: var(--plj-red); }
.plj-chapter-card__badge--med  { background: rgba(245, 158, 11, 0.1); color: var(--plj-yellow); }
.plj-chapter-card__badge--easy { background: rgba(16, 185, 129, 0.1); color: var(--plj-green); }

.plj-chapter-card__count {
  font-size: 11px;
  color: var(--plj-text-3);
  font-weight: 600;
}

/* ── SINGLE POST — READ CONTAINER ── */
.plj-post-container {
  background: var(--plj-bg-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 0 4px 24px -10px rgba(0, 0, 0, 0.3);
}

@media (max-width: 576px) {
  .plj-post-container {
    padding: 20px;
  }
}

/* Post Header / Breadcrumbs */
.plj-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--plj-text-3);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.plj-breadcrumb a {
  color: var(--plj-text-2);
  text-decoration: none !important;
}

.plj-breadcrumb a:hover {
  color: var(--plj-cyan);
}

.plj-breadcrumb i {
  font-size: 10px;
}

.plj-breadcrumb .current {
  color: var(--plj-text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 250px;
}

.plj-post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--plj-border);
}

.plj-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 20px;
  font-family: var(--plj-font-head);
}

.plj-badge--easy { background: rgba(16, 185, 129, 0.12); color: var(--plj-green); border: 1px solid rgba(16, 185, 129, 0.2); }
.plj-badge--med  { background: rgba(245, 158, 11, 0.12); color: var(--plj-yellow); border: 1px solid rgba(245, 158, 11, 0.2); }
.plj-badge--hard { background: rgba(239, 68, 68, 0.12); color: var(--plj-red); border: 1px solid rgba(239, 68, 68, 0.2); }

.plj-post-meta__date {
  font-size: 12px;
  color: var(--plj-text-3);
  margin-left: auto;
}

/* Author Profile card inside post */
.plj-post-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--plj-surface);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  margin-bottom: 36px;
}

.plj-post-author__avatar {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 2px solid var(--plj-cyan-border);
  object-fit: cover;
}

.plj-post-author__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--plj-text);
  font-family: var(--plj-font-head);
}

.plj-post-author__cred {
  font-size: 11px;
  color: var(--plj-text-3);
}

.plj-post-author__link {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: var(--plj-cyan);
  text-decoration: none !important;
}

.plj-post-author__link:hover {
  color: var(--plj-cyan-hover);
}

/* Post Content Body Typography */
.entry-content {
  font-size: 15px;
  line-height: 1.8;
}

.entry-content p {
  margin-bottom: 24px;
  color: var(--plj-text-2);
}

.entry-content h1, .entry-content h2, .entry-content h3, .entry-content h4 {
  margin-top: 36px;
  margin-bottom: 16px;
}

.entry-content h2 {
  font-size: clamp(18px, 3.5vw, 22px) !important;
  color: var(--plj-cyan) !important;
  border-bottom: 1px solid var(--plj-border);
  padding-bottom: 8px;
}

.entry-content h3 {
  font-size: clamp(15px, 3vw, 17px) !important;
  color: var(--plj-text) !important;
}

.entry-content hr {
  border: none;
  height: 1px;
  background: var(--plj-border);
  margin: 40px 0;
}

.entry-content ul, .entry-content ol {
  padding-left: 20px;
  margin-bottom: 24px;
}

.entry-content li {
  margin-bottom: 8px;
  color: var(--plj-text-2);
}

.entry-content strong {
  color: #FFFFFF;
}

.entry-content blockquote {
  border-left: 4px solid var(--plj-cyan);
  padding: 8px 16px;
  background: var(--plj-surface);
  border-radius: 0 var(--plj-radius-sm) var(--plj-radius-sm) 0;
  margin: 24px 0;
  font-style: italic;
}

/* Concept Cards inside post */
.plj-concept-note {
  background: rgba(6, 182, 212, 0.04);
  border-left: 3px solid var(--plj-cyan);
  border-radius: 0 var(--plj-radius-sm) var(--plj-radius-sm) 0;
  padding: 16px 20px;
  margin: 28px 0;
}

.plj-concept-note__label {
  font-size: 11px;
  font-weight: 700;
  color: var(--plj-cyan);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--plj-font-head);
}

.plj-concept-note__text {
  font-size: 13.5px;
  color: var(--plj-text-2);
}

/* Image styles inside post */
.entry-content img {
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  margin: 20px auto;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

/* Handwritten Solution Button Overrides */
.entry-content p a[download],
.entry-content p a[href*="wp-content/uploads"][href$=".png"],
.entry-content p a[href*="wp-content/uploads"][href$=".jpg"] {
  background: var(--plj-cyan) !important;
  color: #000000 !important;
  border-radius: var(--plj-radius-sm) !important;
  font-family: var(--plj-font-head) !important;
  font-weight: 700 !important;
  padding: 12px 24px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px !important;
  text-decoration: none !important;
  box-shadow: none !important;
  transition: var(--plj-transition) !important;
}

.entry-content p a[download]:hover,
.entry-content p a[href*="wp-content/uploads"][href$=".png"]:hover,
.entry-content p a[href*="wp-content/uploads"][href$=".jpg"]:hover {
  background: var(--plj-cyan-hover) !important;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.4) !important;
}

/* ── ACTION STRIP & BUTTONS ── */
.plj-action-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--plj-border);
  flex-wrap: wrap;
}

.plj-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--plj-font-head);
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--plj-radius-sm);
  cursor: pointer;
  transition: var(--plj-transition);
  border: 1px solid transparent;
  line-height: 1.2;
}

.plj-btn--primary {
  background: var(--plj-cyan);
  color: #000000 !important;
  text-decoration: none !important;
}

.plj-btn--primary:hover {
  background: var(--plj-cyan-hover);
  color: #000000 !important;
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.4);
}

.plj-btn--secondary {
  background: var(--plj-surface-2);
  border-color: var(--plj-border);
  color: var(--plj-text-2) !important;
  text-decoration: none !important;
}

.plj-btn--secondary:hover {
  background: var(--plj-surface-2);
  border-color: var(--plj-cyan);
  color: var(--plj-cyan) !important;
}

/* ── MOBILE BOTTOM NAVIGATION ── */
.plj-bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--plj-nav-h);
  background: rgba(15, 21, 36, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--plj-border);
  display: flex;
  z-index: 999;
}

.plj-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--plj-text-3);
  font-size: 10px;
  font-family: var(--plj-font-head);
  font-weight: 600;
  text-decoration: none !important;
  transition: var(--plj-transition);
}

.plj-nav-item i {
  font-size: 20px;
  transition: var(--plj-transition);
}

.plj-nav-item:hover, .plj-nav-item.plj-active {
  color: var(--plj-cyan);
}

/* ── WHATSAPP BOTTOM BAR ── */
.plj-wa-bar {
  background: var(--plj-bg-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  flex-wrap: wrap;
  gap: 16px;
}

.plj-wa-text strong {
  color: var(--plj-text);
  font-family: var(--plj-font-head);
  display: block;
}

.plj-wa-text span {
  font-size: 12px;
  color: var(--plj-text-3);
}

.plj-wa-btn {
  background: #25D366;
  color: #000000 !important;
  padding: 10px 20px;
  border-radius: var(--plj-radius-sm);
  font-family: var(--plj-font-head);
  font-weight: 700;
  font-size: 13.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none !important;
}

.plj-wa-btn:hover {
  background: #20BA5A;
  box-shadow: 0 0 12px rgba(37, 211, 102, 0.4);
}

/* ── FOOTER ── */
.plj-footer {
  background: var(--plj-bg-2);
  border-top: 1px solid var(--plj-border);
  padding: 30px 20px;
  text-align: center;
  font-size: 13px;
  color: var(--plj-text-3);
}

.plj-footer a {
  color: var(--plj-text-2);
  text-decoration: none !important;
}

.plj-footer a:hover {
  color: var(--plj-cyan);
}

/* ── VIDEO SOLUTION BUTTONS ── */
.plj-btn--video {
  background: #EF4444 !important; /* YouTube Red */
  color: #FFFFFF !important;
}
.plj-btn--video:hover {
  background: #DC2626 !important;
  color: #FFFFFF !important;
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.45) !important;
}

/* Inline post content YouTube link overrides */
body.plj-post .entry-content a[href*="youtu.be"],
body.plj-post .entry-content a[href*="youtube.com"] {
  display: inline-flex !important;
  align-items: center !important;
  gap: 8px !important;
  background: #EF4444 !important;
  color: #FFFFFF !important;
  font-family: var(--plj-font-head) !important;
  font-weight: 700 !important;
  font-size: 14px !important;
  padding: 12px 20px !important;
  border-radius: var(--plj-radius-sm) !important;
  text-decoration: none !important;
  margin: 12px 0 !important;
  transition: var(--plj-transition) !important;
}

body.plj-post .entry-content a[href*="youtu.be"]:hover,
body.plj-post .entry-content a[href*="youtube.com"]:hover {
  background: #DC2626 !important;
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.45) !important;
}

body.plj-post .entry-content a[href*="youtu.be"]::before,
body.plj-post .entry-content a[href*="youtube.com"]::before {
  content: "▶" !important;
  font-size: 11px !important;
  color: #FFFFFF !important;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE DESIGN SYSTEM (DESKTOP, TABLET, MOBILE)
   ═══════════════════════════════════════════════ */

/* 1. DESKTOP LAYOUT (min-width: 1025px) */
@media (min-width: 1025px) {
  .plj-container {
    max-width: var(--plj-max-w);
  }
  .plj-container--wide {
    max-width: 1100px;
  }
  .plj-chapter-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 20px;
  }
  .plj-post-container {
    padding: 48px !important;
  }
  .plj-bottom-nav {
    display: none !important;
  }
  body {
    padding-bottom: 0 !important;
  }
}

/* 2. TABLET LAYOUT (min-width: 768px) and (max-width: 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .plj-container {
    max-width: 900px !important;
  }
  .plj-container--wide {
    max-width: 900px !important;
    padding: 0 24px !important;
  }
  .plj-chapter-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 16px;
  }
  .plj-post-container {
    padding: 32px !important;
  }
  .plj-bottom-nav {
    display: none !important;
  }
  body {
    padding-bottom: 0 !important;
  }
  .plj-hero h1 {
    font-size: 38px !important;
  }
  .plj-hero-title {
    font-size: 32px !important;
  }
}

/* 3. CELLPHONE / MOBILE LAYOUT (max-width: 767px) */
@media (max-width: 767px) {
  .plj-container, .plj-container--wide {
    max-width: 100% !important;
    padding: 0 16px !important;
  }
  .plj-chapter-grid {
    grid-template-columns: 1fr !important;
    gap: 12px;
  }
  .plj-post-container {
    padding: 18px !important;
    border-radius: var(--plj-radius-sm) !important;
  }
  .plj-hero {
    padding: 40px 10px 24px !important;
  }
  .plj-hero h1 {
    font-size: 26px !important;
    letter-spacing: -0.5px !important;
  }
  .plj-hero-sub {
    font-size: 14px !important;
    margin-bottom: 24px !important;
  }
  .plj-finder {
    padding: 16px !important;
    margin-bottom: 32px !important;
  }
  .plj-finder-input-wrapper input {
    padding: 12px 14px 12px 38px !important;
    font-size: 14px !important;
  }
  .plj-filter-btn {
    padding: 6px 12px !important;
    font-size: 12px !important;
  }
  .plj-hero-title {
    font-size: 24px !important;
    line-height: 1.3 !important;
  }
  .plj-post-author {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
    padding: 16px !important;
  }
  .plj-post-author__link {
    margin-left: 0 !important;
    margin-top: 4px;
  }
  .plj-action-strip {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
  }
  .plj-btn {
    width: 100% !important;
    text-align: center;
  }
}

/* ── SUBJECT TABS & SYLLABUS LAYOUT ── */

.plj-subject-tabs {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--plj-border);
  padding-bottom: 12px;
}

.plj-subject-tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--plj-text-3);
  padding: 10px 18px;
  border-radius: var(--plj-radius);
  font-family: var(--plj-font-head);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: var(--plj-transition);
}

.plj-subject-tab-btn:hover {
  color: var(--plj-text);
  background: var(--plj-surface);
}

.plj-subject-tab-btn.plj-active {
  color: var(--plj-text);
}

.plj-subject-tab-btn[data-subject="chemistry"].plj-active {
  background: var(--plj-cyan-dim);
  border-color: var(--plj-cyan-border);
  color: var(--plj-cyan-hover);
}

.plj-subject-tab-btn[data-subject="physics"].plj-active {
  background: var(--plj-physics-dim);
  border-color: var(--plj-physics-border);
  color: var(--plj-physics-hover);
}

.plj-subject-tab-btn[data-subject="mathematics"].plj-active {
  background: var(--plj-math-dim);
  border-color: var(--plj-math-border);
  color: var(--plj-math-hover);
}

.plj-subject-content {
  display: none;
}

.plj-subject-content.plj-active {
  display: block;
}

.plj-exam-group-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--plj-text-2);
  margin-top: 32px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plj-exam-group-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--plj-border);
}

/* Syllabus layout grid: sidebar + main */
.plj-syllabus-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 30px;
  margin-top: 24px;
}

@media (max-width: 768px) {
  .plj-syllabus-layout {
    grid-template-columns: 1fr;
  }
}

.plj-filter-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.plj-filter-card {
  background: var(--plj-bg-2);
  border: 1px solid var(--plj-border);
  border-radius: var(--plj-radius);
  padding: 20px;
}

.plj-filter-card__title {
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--plj-text);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--plj-border);
  padding-bottom: 8px;
}

.plj-filter-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.plj-filter-item-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--plj-text-2);
  padding: 8px 12px;
  border-radius: var(--plj-radius-sm);
  border: 1px solid transparent;
  transition: var(--plj-transition);
}

.plj-filter-item-link:hover {
  background: var(--plj-surface-2);
  color: var(--plj-text);
}

.plj-filter-item-link span.count {
  font-size: 11px;
  background: var(--plj-bg-3);
  color: var(--plj-text-3);
  padding: 2px 6px;
  border-radius: 10px;
}

/* Active Filter Highlights */
.plj-filter-sidebar--chemistry .plj-filter-item-link--active {
  background: var(--plj-cyan-dim);
  color: var(--plj-cyan-hover) !important;
  border: 1px solid var(--plj-cyan-border);
}

.plj-filter-sidebar--physics .plj-filter-item-link--active {
  background: var(--plj-physics-dim);
  color: var(--plj-physics-hover) !important;
  border: 1px solid var(--plj-physics-border);
}

.plj-filter-sidebar--math .plj-filter-item-link--active {
  background: var(--plj-math-dim);
  color: var(--plj-math-hover) !important;
  border: 1px solid var(--plj-math-border);
}

/* ═══════════════════════════════════════════════
   NEW FEATURE STYLES v2.0 — Spacious Layout
   ═══════════════════════════════════════════════ */

.plj-post-layout{display:grid;grid-template-columns:280px 1fr;gap:48px;margin-bottom:80px}
@media(max-width:1024px){.plj-post-layout{grid-template-columns:1fr;gap:32px}}
@media(max-width:768px){.plj-post-layout{grid-template-columns:1fr;gap:24px}}
.plj-post-toc-wrapper{position:sticky;top:100px;height:fit-content}
.plj-post-toc{background:var(--plj-bg-2);border:1px solid var(--plj-border);border-radius:var(--plj-radius);padding:24px;font-size:14px;box-shadow:0 4px 12px rgba(0,0,0,0.2)}
.plj-toc-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--plj-border)}
.plj-toc-header h3{font-size:16px;font-weight:700;color:var(--plj-text);margin:0;font-family:var(--plj-font-head)}
.plj-toc-toggle{background:none;border:none;color:var(--plj-cyan);cursor:pointer;padding:6px;display:flex;align-items:center;justify-content:center;font-size:18px;transition:var(--plj-transition)}
.plj-toc-toggle:hover{color:var(--plj-cyan-hover);transform:scale(1.1)}
.plj-toc-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.plj-toc-list li{margin:0;padding:0}
.plj-toc-list a{color:var(--plj-text-2);text-decoration:none;padding:8px 12px;border-radius:var(--plj-radius-sm);transition:var(--plj-transition);display:block;line-height:1.5}
.plj-toc-list a:hover{color:var(--plj-cyan-hover);background:var(--plj-surface);padding-left:16px}
.plj-toc-list li.active>a{color:var(--plj-cyan);font-weight:600;background:var(--plj-cyan-dim);border-left:3px solid var(--plj-cyan);padding-left:9px}
@media(max-width:1024px){.plj-post-toc-wrapper{position:static;top:auto;order:-1}.plj-post-toc{margin-bottom:32px}}
.plj-post-share{display:flex;align-items:center;gap:16px;margin:32px 0;padding:24px;background:var(--plj-cyan-dim);border:1px solid var(--plj-cyan-border);border-radius:var(--plj-radius)}
.plj-share-label{font-size:12px;font-weight:700;color:var(--plj-cyan);text-transform:uppercase;letter-spacing:1.5px;font-family:var(--plj-font-head);min-width:fit-content}
.plj-share-buttons{display:flex;gap:12px;flex-wrap:wrap}
.plj-share-btn{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;font-size:20px;text-decoration:none;border:none;cursor:pointer;transition:var(--plj-transition);box-shadow:0 4px 12px rgba(0,0,0,0.2)}
.plj-share-btn:hover{transform:translateY(-3px) scale(1.08);box-shadow:0 8px 20px rgba(0,0,0,0.3)}
.plj-share-whatsapp{background:#25D366;color:#fff}
.plj-share-whatsapp:hover{background:#20ba5c}
.plj-share-facebook{background:#1877F2;color:#fff}
.plj-share-facebook:hover{background:#0a66c2}
.plj-share-twitter{background:#1DA1F2;color:#fff}
.plj-share-twitter:hover{background:#1a8cd8}
.plj-share-telegram{background:#0088cc;color:#fff}
.plj-share-telegram:hover{background:#007ab3}
@media(max-width:768px){.plj-post-share{flex-direction:column;align-items:flex-start;gap:12px}.plj-share-buttons{width:100%}}
.plj-ad-slot{margin:40px 0;padding:32px;background:var(--plj-bg-2);border:2px dashed var(--plj-border);border-radius:var(--plj-radius);text-align:center;min-height:280px;display:flex;align-items:center;justify-content:center}
.plj-ad-above{margin-top:32px;margin-bottom:40px}
.plj-ad-inline{margin:40px 0}
.plj-ad-below{margin-top:40px;margin-bottom:32px}
@media(max-width:768px){.plj-ad-slot{margin:32px 0;padding:24px;min-height:250px}}
.plj-related-posts{margin-top:80px;padding-top:48px;border-top:2px solid var(--plj-border)}
.plj-related-posts h2{font-size:28px;font-weight:800;color:var(--plj-text);margin-bottom:32px;font-family:var(--plj-font-head)}
.plj-related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.plj-related-card{background:var(--plj-bg-2);border:1px solid var(--plj-border);border-radius:var(--plj-radius);padding:28px;text-decoration:none;transition:var(--plj-transition);display:flex;flex-direction:column;justify-content:space-between;min-height:160px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.plj-related-card:hover{background:var(--plj-surface-2);transform:translateY(-6px);border-color:var(--plj-cyan-border);box-shadow:0 12px 32px rgba(6,182,212,0.15)}
.plj-related-card h4{font-size:17px;font-weight:700;color:var(--plj-text);margin:0 0 16px 0;line-height:1.5;font-family:var(--plj-font-head)}
.plj-related-arrow{color:var(--plj-cyan);font-weight:700;font-size:20px;align-self:flex-start;margin-top:auto;transition:var(--plj-transition)}
.plj-related-card:hover .plj-related-arrow{color:var(--plj-cyan-hover);transform:translateX(4px)}
.plj-post-author__bio{font-size:13px;color:var(--plj-text-3);margin-top:8px;margin-bottom:16px;line-height:1.6}
@media(max-width:768px){.plj-related-posts{margin-top:60px;padding-top:32px}.plj-related-posts h2{font-size:24px;margin-bottom:24px}.plj-related-grid{grid-template-columns:1fr;gap:16px}.plj-related-card{padding:20px;min-height:140px}}

/* ═══════════════════════════════════════════════
   END NEW FEATURE STYLES
   ═══════════════════════════════════════════════ */