/*
Theme Name: English Resources
Theme URI: https://example.com/english-resources
Author: Amol Ramrao Kamble
Author URI: https://example.com
Description: An ultra-fast, mobile-first WordPress theme for ESL/EFL learners, school test candidates (CBSE, SSC, State Boards) and English teachers. Built with vanilla CSS/JS for maximum Core Web Vitals performance. Includes lessons, grammar, vocabulary, blog and an e-books storefront with digital checkout.
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: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: english-resources
Tags: education, e-commerce, blog, custom-menu, featured-images, translation-ready
*/

/* =======================================================================
   TABLE OF CONTENTS
   1. Design Tokens (CSS Custom Properties)
   2. Reset & Base
   3. Typography
   4. Layout Helpers
   5. Buttons & Forms
   6. Header & Navigation
   7. Hero & Home Sections
   8. Cards (Lessons / Ebooks / Testimonials)
   9. Grammar & Vocabulary Components
   10. Ebooks Storefront & Checkout Modal
   11. Blog & Sidebar
   12. About & Contact
   13. Footer
   14. Utilities & Animations
   15. Responsive Breakpoints
   ======================================================================= */

/* 1. Design Tokens ------------------------------------------------------ */
:root{
  --color-primary:#2451B6;
  --color-primary-dark:#173a8c;
  --color-primary-light:#e8effc;
  --color-accent:#F5A623;
  --color-accent-dark:#d68c0f;
  --color-success:#1F9D55;
  --color-danger:#D64545;
  --color-ink:#1B2430;
  --color-ink-soft:#4B5563;
  --color-border:#E3E8F0;
  --color-surface:#FFFFFF;
  --color-bg:#F7F9FC;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-serif:Georgia,"Times New Roman",serif;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-sm:0 1px 3px rgba(20,30,60,.08);
  --shadow-md:0 6px 20px rgba(20,30,60,.10);
  --shadow-lg:0 16px 40px rgba(20,30,60,.14);
  --space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;
  --space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4.5rem;
  --container:1200px;
  --header-h:72px;
  --transition:180ms ease;
}

/* 2. Reset & Base -------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--color-ink);
  background:var(--color-bg);
  line-height:1.6;
  font-size:1rem;
}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--color-primary-dark)}
ul,ol{padding-left:1.25rem}
button{font-family:inherit}
:focus-visible{outline:3px solid var(--color-accent);outline-offset:2px}
.skip-link{
  position:absolute;left:-9999px;top:auto;background:var(--color-primary);color:#fff;
  padding:.75rem 1.25rem;z-index:1000;border-radius:0 0 var(--radius-sm) 0;
}
.skip-link:focus{left:0;top:0}

/* 3. Typography ----------------------------------------------------------*/
h1,h2,h3,h4,h5,h6{line-height:1.25;margin:0 0 var(--space-4);font-weight:800;color:var(--color-ink)}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.25rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}
p{margin:0 0 var(--space-4)}
.eyebrow{
  display:inline-block;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  font-size:.75rem;color:var(--color-primary);background:var(--color-primary-light);
  padding:.35rem .75rem;border-radius:999px;margin-bottom:var(--space-3);
}
.section-lede{color:var(--color-ink-soft);max-width:640px;font-size:1.05rem}

/* 4. Layout Helpers ------------------------------------------------------*/
.container{max-width:var(--container);margin:0 auto;padding:0 var(--space-5)}
.section{padding:var(--space-8) 0}
.section--tight{padding:var(--space-6) 0}
.section-head{display:flex;flex-direction:column;align-items:flex-start;margin-bottom:var(--space-6);gap:var(--space-2)}
.grid{display:grid;gap:var(--space-5)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.stack{display:flex;flex-direction:column}
.row{display:flex;align-items:center}
.row--between{justify-content:space-between}
.row--wrap{flex-wrap:wrap}
.gap-2{gap:var(--space-2)} .gap-3{gap:var(--space-3)} .gap-4{gap:var(--space-4)}

/* 5. Buttons & Forms -------------------------------------------------------*/
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.8rem 1.5rem;border-radius:999px;font-weight:700;font-size:.95rem;
  border:2px solid transparent;cursor:pointer;transition:transform var(--transition),box-shadow var(--transition),background var(--transition);
  line-height:1;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--color-primary-dark);color:#fff}
.btn-accent{background:var(--color-accent);color:#1B2430}
.btn-accent:hover{background:var(--color-accent-dark)}
.btn-outline{background:transparent;border-color:var(--color-primary);color:var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:#fff}
.btn-ghost{background:transparent;color:var(--color-ink);border-color:var(--color-border)}
.btn-block{width:100%}
.btn-sm{padding:.5rem 1rem;font-size:.85rem}

input,select,textarea{
  width:100%;padding:.75rem 1rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);
  font-size:1rem;font-family:inherit;background:#fff;color:var(--color-ink);
}
label{display:block;font-weight:600;margin-bottom:.35rem;font-size:.9rem}
.field{margin-bottom:var(--space-4)}
.form-note{font-size:.8rem;color:var(--color-ink-soft)}

/* 6. Header & Navigation ---------------------------------------------------*/
.site-header{
  position:sticky;top:0;z-index:500;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--color-border);height:var(--header-h);
}
.site-header .container{height:100%;display:flex;align-items:center;justify-content:space-between}
.site-logo{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.2rem;color:var(--color-ink)}
.site-logo:hover{color:var(--color-ink)}
.site-logo svg{flex:none}
.primary-nav{display:flex;align-items:center;gap:var(--space-6)}
.primary-nav ul{list-style:none;display:flex;gap:var(--space-5);margin:0;padding:0}
.primary-nav a{color:var(--color-ink);font-weight:600;font-size:.95rem}
.primary-nav a:hover,.primary-nav .current-menu-item>a{color:var(--color-primary)}
.header-actions{display:flex;align-items:center;gap:var(--space-3)}
.nav-toggle{
  display:none;background:none;border:none;cursor:pointer;padding:.5rem;width:44px;height:44px;
  align-items:center;justify-content:center;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:24px;height:2px;background:var(--color-ink);border-radius:2px;
  transition:transform var(--transition),opacity var(--transition);position:relative;
}
.nav-toggle span::before{position:absolute;top:-8px}
.nav-toggle span::after{position:absolute;top:8px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0}

/* 7. Hero & Home Sections ---------------------------------------------------*/
.hero{
  position:relative;overflow:hidden;padding:var(--space-8) 0;
  background:linear-gradient(160deg,var(--color-primary-light) 0%,var(--color-bg) 60%);
}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:var(--space-7);align-items:center}
.hero h1{margin-bottom:var(--space-4)}
.hero-cta{display:flex;gap:var(--space-3);flex-wrap:wrap;margin-top:var(--space-5)}
.hero-stats{display:flex;gap:var(--space-6);margin-top:var(--space-6)}
.hero-stat b{display:block;font-size:1.5rem;color:var(--color-primary)}
.hero-stat span{font-size:.8rem;color:var(--color-ink-soft)}
.hero-media{position:relative}
.hero-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.hero-badge{
  position:absolute;bottom:-16px;left:-16px;background:#fff;padding:.85rem 1.1rem;border-radius:var(--radius-md);
  box-shadow:var(--shadow-md);font-weight:700;font-size:.85rem;display:flex;align-items:center;gap:.5rem;
}

.pathways{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-4)}
.pathway-card{
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:var(--space-5);text-align:center;transition:transform var(--transition),box-shadow var(--transition);
}
.pathway-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.pathway-icon{
  width:56px;height:56px;border-radius:50%;background:var(--color-primary-light);display:flex;
  align-items:center;justify-content:center;margin:0 auto var(--space-3);color:var(--color-primary);
}

.testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5)}
.testimonial-card{
  background:var(--color-surface);border-radius:var(--radius-md);padding:var(--space-5);
  border:1px solid var(--color-border);box-shadow:var(--shadow-sm);
}
.testimonial-quote{font-style:italic;color:var(--color-ink-soft);margin-bottom:var(--space-4)}
.testimonial-author{display:flex;align-items:center;gap:.75rem;font-weight:700}
.testimonial-author img{width:44px;height:44px;border-radius:50%;object-fit:cover}

.newsletter{
  background:var(--color-primary);color:#fff;border-radius:var(--radius-lg);padding:var(--space-7);
  display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);flex-wrap:wrap;
}
.newsletter h2,.newsletter p{color:#fff}
.newsletter-form{display:flex;gap:var(--space-2);flex:1;min-width:280px;max-width:420px}
.newsletter-form input{flex:1}

/* 8. Cards (Lessons / Ebooks) ------------------------------------------------*/
.card{
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);
  overflow:hidden;display:flex;flex-direction:column;transition:transform var(--transition),box-shadow var(--transition);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.card-media{aspect-ratio:16/10;overflow:hidden;background:var(--color-primary-light)}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:var(--space-4);display:flex;flex-direction:column;gap:.5rem;flex:1}
.card-meta{display:flex;gap:.5rem;flex-wrap:wrap}
.badge{
  display:inline-block;font-size:.72rem;font-weight:700;padding:.25rem .6rem;border-radius:999px;
  background:var(--color-primary-light);color:var(--color-primary);
}
.badge-board{background:#FDECD2;color:#9a5b00}
.badge-level{background:#E3F3E8;color:var(--color-success)}
.badge-sale{background:#FCE9E9;color:var(--color-danger)}
.card-title{font-size:1.05rem;margin:0}
.card-foot{margin-top:auto;padding-top:var(--space-3);border-top:1px solid var(--color-border);display:flex;justify-content:space-between;align-items:center}

.filter-bar{
  display:flex;gap:var(--space-3);flex-wrap:wrap;align-items:center;background:var(--color-surface);
  border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);margin-bottom:var(--space-6);
}
.filter-bar select,.filter-bar input[type="search"]{width:auto;min-width:160px}
.filter-chip{
  border:1px solid var(--color-border);background:#fff;border-radius:999px;padding:.4rem .9rem;
  font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition);
}
.filter-chip.is-active,.filter-chip:hover{background:var(--color-primary);border-color:var(--color-primary);color:#fff}

/* 9. Grammar & Vocabulary Components -----------------------------------------*/
.rule-card{
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:var(--space-5);cursor:pointer;
}
.rule-card summary{list-style:none;display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:1.05rem}
.rule-card summary::-webkit-details-marker{display:none}
.rule-card summary::after{content:"+";font-size:1.4rem;color:var(--color-primary);transition:transform var(--transition)}
.rule-card[open] summary::after{transform:rotate(45deg)}
.rule-card-body{padding-top:var(--space-4);color:var(--color-ink-soft)}
.exercise-box{
  background:var(--color-primary-light);border-radius:var(--radius-sm);padding:var(--space-4);margin-top:var(--space-4);
}
.exercise-box .field{margin-bottom:var(--space-2)}
.exercise-feedback{font-weight:700;margin-top:var(--space-2);display:none}
.exercise-feedback.is-correct{color:var(--color-success);display:block}
.exercise-feedback.is-incorrect{color:var(--color-danger);display:block}

.word-carousel{
  position:relative;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));
  color:#fff;border-radius:var(--radius-lg);padding:var(--space-7);text-align:center;overflow:hidden;
}
.word-carousel h2,.word-carousel p{color:#fff}
.word-of-day{font-size:clamp(2rem,5vw,3rem);font-weight:800}
.word-meaning{max-width:520px;margin:0 auto var(--space-4)}
.carousel-controls{display:flex;justify-content:center;gap:var(--space-3);margin-top:var(--space-4)}
.carousel-controls button{
  background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.4);color:#fff;
  border-radius:50%;width:40px;height:40px;cursor:pointer;
}

.flashcard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-4)}
.flashcard{perspective:1000px;height:160px;cursor:pointer}
.flashcard-inner{
  position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d;
}
.flashcard.is-flipped .flashcard-inner{transform:rotateY(180deg)}
.flashcard-face{
  position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius-md);
  display:flex;align-items:center;justify-content:center;text-align:center;padding:var(--space-3);
  border:1px solid var(--color-border);background:#fff;font-weight:700;
}
.flashcard-face--back{transform:rotateY(180deg);background:var(--color-primary-light);font-weight:500}

/* 10. Ebooks Storefront & Checkout Modal --------------------------------------*/
.price-row{display:flex;align-items:baseline;gap:.5rem}
.price{font-size:1.25rem;font-weight:800;color:var(--color-ink)}
.price-strike{text-decoration:line-through;color:var(--color-ink-soft);font-size:.9rem}

.modal-overlay{
  position:fixed;inset:0;background:rgba(15,23,42,.55);display:none;align-items:center;justify-content:center;
  z-index:1000;padding:var(--space-4);
}
.modal-overlay.is-open{display:flex}
.modal{
  background:#fff;border-radius:var(--radius-lg);max-width:520px;width:100%;max-height:90vh;overflow-y:auto;
  box-shadow:var(--shadow-lg);padding:var(--space-6);position:relative;
}
.modal-close{position:absolute;top:var(--space-4);right:var(--space-4);background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--color-ink-soft)}
.modal-title{margin-bottom:var(--space-2)}
.payment-methods{display:flex;gap:var(--space-2);margin:var(--space-4) 0}
.payment-method{
  flex:1;border:2px solid var(--color-border);border-radius:var(--radius-sm);padding:.75rem;text-align:center;
  font-weight:700;font-size:.85rem;cursor:pointer;background:#fff;
}
.payment-method.is-selected{border-color:var(--color-primary);background:var(--color-primary-light);color:var(--color-primary)}
.checkout-status{margin-top:var(--space-4);padding:var(--space-3);border-radius:var(--radius-sm);font-weight:600;display:none}
.checkout-status.is-visible{display:block}
.checkout-status.is-success{background:#E3F3E8;color:var(--color-success)}
.checkout-status.is-error{background:#FCE9E9;color:var(--color-danger)}
.checkout-status.is-pending{background:var(--color-primary-light);color:var(--color-primary)}
.download-token{
  display:flex;align-items:center;justify-content:space-between;background:var(--color-bg);border:1px dashed var(--color-border);
  border-radius:var(--radius-sm);padding:var(--space-3);margin-top:var(--space-3);font-size:.85rem;
}

/* 11. Blog & Sidebar ------------------------------------------------------*/
.blog-layout{display:grid;grid-template-columns:2.2fr 1fr;gap:var(--space-7);align-items:start}
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-5)}
.post-excerpt{color:var(--color-ink-soft);font-size:.95rem}
.post-meta{font-size:.8rem;color:var(--color-ink-soft);display:flex;gap:.75rem;align-items:center}
.sidebar{display:flex;flex-direction:column;gap:var(--space-5);position:sticky;top:calc(var(--header-h) + var(--space-5))}
.widget{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5)}
.widget h3{font-size:1rem;margin-bottom:var(--space-3)}
.widget ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.6rem}
.widget li a{color:var(--color-ink);font-size:.9rem}
.pagination{display:flex;gap:.5rem;justify-content:center;margin-top:var(--space-7)}
.pagination a,.pagination span{
  border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:.5rem .9rem;font-weight:600;font-size:.9rem;
}
.pagination .current{background:var(--color-primary);border-color:var(--color-primary);color:#fff}

/* 12. About & Contact ------------------------------------------------------*/
.tutor-card{text-align:center}
.tutor-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto var(--space-3)}
.method-steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5)}
.method-step{position:relative;padding-left:3rem}
.method-step::before{
  counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:2.2rem;height:2.2rem;
  border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;
}
.faq-list{display:flex;flex-direction:column;gap:var(--space-3)}
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-7)}
.contact-info-item{display:flex;gap:var(--space-3);align-items:flex-start;margin-bottom:var(--space-4)}
.contact-info-icon{
  width:40px;height:40px;border-radius:50%;background:var(--color-primary-light);color:var(--color-primary);
  display:flex;align-items:center;justify-content:center;flex:none;
}

/* 13. Footer ---------------------------------------------------------------*/
.site-footer{background:#101828;color:#CBD5E1;padding:var(--space-8) 0 var(--space-5)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:var(--space-6);margin-bottom:var(--space-6)}
.footer-brand h3{color:#fff}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:var(--space-3)}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.6rem}
.footer-col a{color:#94A3B8;font-size:.9rem}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:var(--space-5);display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:var(--space-3);font-size:.85rem;color:#94A3B8;
}
.social-links{display:flex;gap:.75rem}
.social-links a{
  width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;
  justify-content:center;color:#fff;
}

/* 14. Utilities & Animations -------------------------------------------------*/
.text-center{text-align:center}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
[data-animate]{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
[data-animate].is-visible{opacity:1;transform:translateY(0)}
.spinner{
  width:18px;height:18px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;
  animation:spin .7s linear infinite;display:inline-block;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* 15. Responsive Breakpoints -------------------------------------------------*/
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .pathways{grid-template-columns:repeat(2,1fr)}
  .testimonials{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:1fr}
  .blog-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .flashcard-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:820px){
  .hero .container{grid-template-columns:1fr}
  .hero-media{order:-1}
  .contact-layout{grid-template-columns:1fr}
  .method-steps{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav-toggle{display:flex}
  .primary-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:var(--space-5);transform:translateX(100%);transition:transform var(--transition);
    overflow-y:auto;
  }
  .primary-nav.is-open{transform:translateX(0)}
  .primary-nav ul{flex-direction:column;gap:0}
  .primary-nav li{border-bottom:1px solid var(--color-border)}
  .primary-nav a{display:block;padding:1rem 0}
  .grid--3,.grid--4,.pathways,.testimonials{grid-template-columns:1fr}
  .flashcard-grid{grid-template-columns:repeat(2,1fr)}
  .newsletter{flex-direction:column;text-align:center}
  .newsletter-form{max-width:100%}
  .footer-grid{grid-template-columns:1fr}
}