/*
Theme Name: GrammarReading
Theme URI: https://grammarreading.com/
Author: GrammarReading
Description: A clean, responsive learning platform theme for English grammar, reading, vocabulary and writing resources, with lessons, quizzes and student progress tracking.
Version: 2.2.0
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
Text Domain: grammarreading
Tags: education, blog, custom-logo, custom-menu, featured-images, full-width-template, editor-style
*/

:root {
  --gr-ink: #17233b;
  --gr-muted: #65728a;
  --gr-primary: #3157d5;
  --gr-primary-dark: #2344b5;
  --gr-teal: #17a896;
  --gr-soft: #f4f7ff;
  --gr-border: #e5eaf3;
  --gr-white: #fff;
  --gr-radius: 18px;
  --gr-shadow: 0 14px 40px rgba(25, 48, 94, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--gr-ink); background: #fff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px; line-height: 1.7;
}
a { color: var(--gr-primary); text-decoration: none; }
a:hover { color: var(--gr-primary-dark); }
img { max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.94); backdrop-filter: blur(14px); border-bottom: 1px solid var(--gr-border); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.site-branding { display: flex; align-items: center; gap: 11px; min-width: 190px; }
.custom-logo { max-height: 44px; width: auto; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--gr-primary), #6686f0); border-radius: 13px; font-weight: 850; font-size: 19px; box-shadow: 0 8px 18px rgba(49,87,213,.22); }
.site-title { margin: 0; color: var(--gr-ink); font-size: 19px; font-weight: 850; letter-spacing: -.6px; line-height: 1.15; }
.site-tagline { margin: 3px 0 0; color: var(--gr-muted); font-size: 11px; line-height: 1.2; }
.primary-nav ul { display: flex; align-items: center; gap: 27px; margin: 0; padding: 0; list-style: none; }
.primary-nav a { color: #3d4960; font-size: 14px; font-weight: 650; }
.primary-nav a:hover, .primary-nav .current-menu-item > a { color: var(--gr-primary); }
.header-cta, .button { display: inline-flex; justify-content: center; align-items: center; gap: 8px; border: 0; border-radius: 999px; padding: 12px 20px; background: var(--gr-primary); color: #fff; font-size: 14px; font-weight: 750; box-shadow: 0 8px 20px rgba(49,87,213,.18); transition: .2s ease; }
.header-cta:hover, .button:hover { background: var(--gr-primary-dark); color: #fff; transform: translateY(-1px); }
.menu-toggle { display: none; border: 1px solid var(--gr-border); background: #fff; color: var(--gr-ink); border-radius: 12px; padding: 8px 12px; }
.hero { overflow: hidden; position: relative; padding: 82px 0 76px; background: radial-gradient(circle at 83% 18%, rgba(23,168,150,.12), transparent 26%), radial-gradient(circle at 7% 95%, rgba(49,87,213,.10), transparent 27%), linear-gradient(180deg,#f8faff 0%,#fff 100%); }
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 54px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 999px; background: #eaf0ff; color: var(--gr-primary); font-size: 12px; font-weight: 800; letter-spacing: .4px; text-transform: uppercase; }
.eyebrow:before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--gr-teal); }
.hero h1 { max-width: 650px; margin: 19px 0 18px; font-size: clamp(40px,5.3vw,65px); line-height: 1.08; letter-spacing: -2.8px; font-weight: 850; }
.hero h1 span { color: var(--gr-primary); }
.hero-copy { max-width: 570px; margin: 0 0 28px; color: var(--gr-muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button-outline { background: #fff; color: var(--gr-ink); border: 1px solid var(--gr-border); box-shadow: none; }
.button-outline:hover { color: var(--gr-primary); background: #fff; border-color: #bdcafa; }
.hero-note { display: flex; gap: 10px; align-items: center; margin-top: 25px; color: var(--gr-muted); font-size: 13px; }
.avatar-stack { display: flex; }
.avatar-stack i { width: 25px; height: 25px; display: block; margin-left: -6px; border: 2px solid #fff; border-radius: 50%; background: linear-gradient(135deg,#c6d4ff,#d7f5ec); }
.avatar-stack i:first-child { margin-left: 0; }
.hero-art { position: relative; min-height: 390px; display: grid; place-items: center; }
.learning-card { position: relative; z-index: 2; width: min(100%,430px); padding: 27px; border: 1px solid rgba(255,255,255,.9); border-radius: 25px; background: rgba(255,255,255,.88); box-shadow: 0 25px 70px rgba(38,62,119,.14); transform: rotate(2deg); }
.card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.card-label { color: var(--gr-muted); font-size: 12px; font-weight: 750; text-transform: uppercase; letter-spacing: .8px; }
.progress-pill { padding: 6px 10px; color: #078a79; background: #e4faf5; border-radius: 999px; font-size: 11px; font-weight: 800; }
.lesson-title { margin: 0 0 7px; font-size: 23px; line-height: 1.3; letter-spacing: -.7px; }
.lesson-sub { margin: 0 0 20px; color: var(--gr-muted); font-size: 13px; }
.lesson-option { display: flex; gap: 12px; align-items: center; padding: 12px 14px; margin-top: 9px; border: 1px solid var(--gr-border); border-radius: 12px; color: #44516a; font-size: 13px; }
.lesson-option strong { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 8px; color: var(--gr-primary); background: #edf1ff; font-size: 11px; }
.lesson-option.correct { border-color: #a8e6d9; background: #f0fcf9; }
.lesson-option.correct strong { color: #fff; background: var(--gr-teal); }
.floating-tag { position: absolute; z-index: 3; padding: 12px 16px; border: 1px solid #edf0f7; border-radius: 14px; background: #fff; box-shadow: var(--gr-shadow); color: var(--gr-ink); font-size: 12px; font-weight: 800; }
.floating-tag.one { top: 32px; right: 0; transform: rotate(5deg); }
.floating-tag.two { bottom: 28px; left: -10px; transform: rotate(-5deg); }
.section { padding: 76px 0; }
.section-soft { background: var(--gr-soft); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
.section-kicker { color: var(--gr-teal); font-size: 12px; font-weight: 850; letter-spacing: 1px; text-transform: uppercase; }
.section-heading h2 { margin: 7px 0 0; font-size: clamp(28px,3.5vw,40px); line-height: 1.15; letter-spacing: -1.5px; }
.section-heading p { max-width: 460px; margin: 0; color: var(--gr-muted); }
.category-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 17px; }
.category-card { display: block; min-height: 205px; padding: 24px; border: 1px solid var(--gr-border); border-radius: var(--gr-radius); background: #fff; box-shadow: 0 5px 18px rgba(25,48,94,.035); transition: .2s ease; }
.category-card:hover { transform: translateY(-5px); border-color: #c9d4fa; box-shadow: var(--gr-shadow); }
.category-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 23px; border-radius: 15px; background: #edf1ff; color: var(--gr-primary); font-size: 22px; }
.category-card:nth-child(2) .category-icon { background: #e5faf5; color: #0a9b86; }
.category-card:nth-child(3) .category-icon { background: #fff4e5; color: #d88920; }
.category-card:nth-child(4) .category-icon { background: #f6edff; color: #9256d4; }
.category-card h3 { margin: 0 0 6px; color: var(--gr-ink); font-size: 18px; }
.category-card p { margin: 0; color: var(--gr-muted); font-size: 13px; line-height: 1.55; }
.post-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.post-card { overflow: hidden; border: 1px solid var(--gr-border); border-radius: var(--gr-radius); background: #fff; transition: .2s ease; }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--gr-shadow); }
.post-thumb { display: block; aspect-ratio: 16/9; overflow: hidden; background: linear-gradient(135deg,#eaf0ff,#e4faf5); }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-card:hover .post-thumb img { transform: scale(1.04); }
.post-placeholder { height: 100%; display: grid; place-items: center; color: var(--gr-primary); font-size: 36px; font-weight: 900; }
.post-content { padding: 21px; }
.post-meta { color: var(--gr-muted); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .6px; }
.post-content h3 { margin: 9px 0 8px; font-size: 19px; line-height: 1.35; letter-spacing: -.4px; }
.post-content h3 a { color: var(--gr-ink); }
.post-content p { margin: 0; color: var(--gr-muted); font-size: 13px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 16px; font-size: 13px; font-weight: 800; }
.learning-cta { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; padding: 42px 48px; border-radius: 26px; color: #fff; background: linear-gradient(115deg,#2344b5,#4269e4 62%,#17a896); }
.learning-cta h2 { margin: 0 0 8px; font-size: clamp(26px,3vw,36px); line-height: 1.2; letter-spacing: -1px; }
.learning-cta p { max-width: 620px; margin: 0; color: rgba(255,255,255,.82); }
.learning-cta .button { color: var(--gr-primary-dark); background: #fff; box-shadow: none; white-space: nowrap; }
.site-footer { padding: 54px 0 22px; color: #dce5ff; background: #17233b; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 50px; padding-bottom: 38px; }
.footer-brand .site-title { color: #fff; }
.footer-brand .site-tagline { color: #aab7d3; }
.footer-about { max-width: 350px; color: #aab7d3; font-size: 13px; }
.site-footer h3 { margin: 0 0 15px; color: #fff; font-size: 14px; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin: 7px 0; }
.site-footer a { color: #b9c6e2; font-size: 13px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.13); color: #9eaccb; font-size: 12px; }
.content-area { padding: 55px 0 80px; }
.page-header { margin-bottom: 32px; }
.page-header h1 { margin: 0 0 8px; font-size: clamp(32px,4vw,48px); line-height: 1.15; letter-spacing: -1.5px; }
.page-header p { color: var(--gr-muted); }
.content-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 48px; }
.entry-content { color: #3e4b63; }
.entry-content h2,.entry-content h3,.entry-content h4 { color: var(--gr-ink); line-height: 1.25; }
.entry-content h2 { margin-top: 1.6em; font-size: 30px; }
.entry-content a { text-decoration: underline; text-underline-offset: 3px; }
.entry-content blockquote { margin: 28px 0; padding: 18px 24px; border-left: 4px solid var(--gr-teal); border-radius: 0 12px 12px 0; background: var(--gr-soft); }
.entry-title { margin: 12px 0 14px; font-size: clamp(32px,4vw,48px); line-height: 1.15; letter-spacing: -1.5px; }
.entry-featured { overflow: hidden; margin: 25px 0; border-radius: 20px; }
.entry-featured img { display: block; width: 100%; }
.sidebar-box { margin-bottom: 22px; padding: 22px; border: 1px solid var(--gr-border); border-radius: 16px; }
.sidebar-box h3 { margin: 0 0 12px; font-size: 16px; }
.sidebar-box ul { margin: 0; padding-left: 18px; color: var(--gr-muted); }
.pagination { margin-top: 35px; }
.pagination .page-numbers { display: inline-block; margin-right: 5px; padding: 8px 13px; border: 1px solid var(--gr-border); border-radius: 9px; }
.pagination .current { color: #fff; border-color: var(--gr-primary); background: var(--gr-primary); }
.search-form { display: flex; gap: 8px; }
.search-form label { flex: 1; }
.search-field { width: 100%; padding: 12px 14px; border: 1px solid var(--gr-border); border-radius: 10px; }
.search-submit { padding: 11px 15px; border: 0; border-radius: 10px; color: #fff; background: var(--gr-primary); cursor: pointer; }
.mobile-nav { display: none; }
@media (max-width: 900px) {
  .primary-nav, .header-cta { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-nav.is-open { display: block; padding: 0 0 18px; }
  .mobile-nav ul { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
  .mobile-nav a { display: block; padding: 11px 4px; border-top: 1px solid var(--gr-border); color: var(--gr-ink); font-weight: 650; }
  .hero-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero { padding: 60px 0 45px; }
  .hero-art { min-height: 340px; }
  .category-grid { grid-template-columns: repeat(2,1fr); }
  .content-layout { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 30px,1160px); }
  .header-inner { min-height: 68px; }
  .hero h1 { letter-spacing: -1.8px; }
  .hero-copy { font-size: 16px; }
  .hero-art { min-height: 310px; }
  .learning-card { padding: 20px; }
  .floating-tag.one { right: -3px; top: 4px; }
  .floating-tag.two { left: -2px; bottom: 3px; }
  .section { padding: 55px 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 12px; }
  .category-grid,.post-grid { grid-template-columns: 1fr; }
  .category-card { min-height: 170px; }
  .learning-cta { grid-template-columns: 1fr; padding: 30px 25px; }
  .learning-cta .button { justify-self: start; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 5px; }
}

/* Student account screens */
.gr-account-wrap { max-width: 1000px; margin: 0 auto; }
.gr-account-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
.gr-account-panel { padding: 30px; border: 1px solid var(--gr-border); border-radius: 20px; background: #fff; box-shadow: var(--gr-shadow); }
.gr-account-panel h2 { margin: 8px 0; font-size: 27px; line-height: 1.2; letter-spacing: -.8px; }
.gr-account-panel > p { color: var(--gr-muted); font-size: 14px; }
.gr-account-panel form { display: grid; gap: 9px; margin-top: 20px; }
.gr-account-panel label { margin-top: 7px; color: var(--gr-ink); font-size: 13px; font-weight: 750; }
.gr-account-panel input { width: 100%; padding: 12px 13px; border: 1px solid var(--gr-border); border-radius: 10px; background: #fbfcff; }
.gr-account-panel input:focus { outline: 2px solid #cbd6ff; border-color: var(--gr-primary); }
.gr-account-panel button { justify-self: start; margin-top: 9px; cursor: pointer; }
.gr-account-small { margin-top: 16px; font-size: 13px; }
.gr-account-details { margin: 22px 0; padding: 12px 17px; border-radius: 12px; background: var(--gr-soft); }
.gr-account-details p { margin: 7px 0; color: var(--gr-muted); font-size: 14px; }
.gr-account-note { margin-top: 22px; padding: 14px; border-radius: 12px; background: #effaf7; color: #247d70 !important; }
.gr-account-alert,.gr-account-success { margin: 0 0 20px; padding: 13px 16px; border-radius: 12px; background: #fff2f0; color: #a33c30; font-size: 14px; }
.gr-account-success { background: #eafaf5; color: #087c68; }
@media (max-width: 700px) { .gr-account-grid { grid-template-columns: 1fr; } .gr-account-panel { padding: 23px; } }

/* Grammar-first homepage layout */
.gr-grammar-hero { padding-top: 76px; padding-bottom: 66px; }
.gr-grammar-art .learning-card { transform: rotate(1deg); }
.gr-example-sentence { margin: 20px 0 13px; padding: 18px 15px; border-radius: 13px; background: #f4f7ff; color: #34425d; font-size: 18px; font-weight: 650; }
.gr-example-sentence mark { padding: 2px 5px; border-radius: 5px; color: #087e70; background: #c9f2e9; }
.gr-example-explain { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid #d8eee9; border-radius: 11px; color: #5d6b80; font-size: 12px; }
.gr-example-explain strong { color: #0b927f; letter-spacing: .7px; }
.gr-mini-progress { height: 6px; overflow: hidden; margin-top: 19px; border-radius: 20px; background: #e9edf6; }
.gr-mini-progress span { display: block; width: 68%; height: 100%; border-radius: inherit; background: linear-gradient(90deg,var(--gr-primary),var(--gr-teal)); }
.gr-card-foot { margin: 10px 0 0; color: var(--gr-muted); font-size: 11px; }
.gr-intro-strip { border-top: 1px solid var(--gr-border); border-bottom: 1px solid var(--gr-border); background: #fff; }
.gr-intro-grid { display: grid; grid-template-columns: repeat(3,1fr); }
.gr-intro-grid > div { display: flex; align-items: center; justify-content: center; gap: 13px; padding: 21px 12px; border-right: 1px solid var(--gr-border); color: #4b5870; font-size: 13px; font-weight: 700; }
.gr-intro-grid > div:last-child { border-right: 0; }
.gr-intro-grid strong { color: var(--gr-primary); font-size: 13px; letter-spacing: 1px; }
.gr-heading-center { display: block; text-align: center; }
.gr-heading-center p { max-width: 650px; margin: 13px auto 0; }
.gr-topic-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; margin-top: 32px; }
.gr-topic-card { display: flex; align-items: center; gap: 14px; min-height: 112px; padding: 17px; border: 1px solid var(--gr-border); border-radius: 16px; background: #fff; transition: .2s ease; }
.gr-topic-card:hover { transform: translateY(-3px); border-color: #c5d2fb; box-shadow: var(--gr-shadow); }
.gr-topic-icon { flex: 0 0 45px; width: 45px; height: 45px; display: grid; place-items: center; border-radius: 13px; color: #fff; background: var(--topic-color); font-size: 14px; font-weight: 850; }
.gr-topic-copy { display: grid; gap: 4px; flex: 1; }
.gr-topic-copy strong { color: var(--gr-ink); font-size: 15px; }
.gr-topic-copy small { color: var(--gr-muted); font-size: 11px; line-height: 1.45; }
.gr-topic-arrow { color: #8b97ac; font-size: 17px; }
.gr-center-action { margin-top: 30px; text-align: center; }
.gr-skill-layout { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 65px; }
.gr-skill-copy h2 { margin: 8px 0 13px; font-size: clamp(29px,3.5vw,40px); line-height: 1.16; letter-spacing: -1.3px; }
.gr-skill-copy p { color: var(--gr-muted); }
.gr-skill-cards { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.gr-skill-cards a { display: grid; gap: 7px; padding: 22px; border: 1px solid var(--gr-border); border-radius: 16px; background: #fff; transition: .2s ease; }
.gr-skill-cards a:hover { transform: translateY(-3px); box-shadow: var(--gr-shadow); }
.gr-skill-cards a > span { width: 39px; height: 39px; display: grid; place-items: center; margin-bottom: 8px; border-radius: 12px; color: var(--gr-primary); background: #edf1ff; font-size: 19px; font-weight: 800; }
.gr-skill-cards strong { color: var(--gr-ink); font-size: 15px; }
.gr-skill-cards small { color: var(--gr-muted); font-size: 12px; line-height: 1.5; }
.gr-blog-section { background: #fff; }
.gr-blog-intro { margin: -15px 0 27px; color: var(--gr-muted); font-size: 14px; }
.gr-blog-empty { grid-column: 1/-1; padding: 34px; border: 1px dashed #cbd5e8; border-radius: 18px; background: #f9fbff; text-align: center; }
.gr-empty-icon { width: 50px; height: 50px; display: grid; place-items: center; margin: 0 auto 12px; border-radius: 15px; color: var(--gr-primary); background: #eaf0ff; font-size: 23px; }
.gr-blog-empty h3 { margin: 0 0 7px; }
.gr-blog-empty p { max-width: 500px; margin: 0 auto; color: var(--gr-muted); font-size: 13px; }
.gr-final-cta-section { padding-top: 20px; }
@media (max-width: 900px) {
  .gr-topic-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .gr-skill-layout { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .gr-intro-grid { grid-template-columns: 1fr; }
  .gr-intro-grid > div { justify-content: flex-start; border-right: 0; border-bottom: 1px solid var(--gr-border); }
  .gr-intro-grid > div:last-child { border-bottom: 0; }
  .gr-topic-grid,.gr-skill-cards { grid-template-columns: 1fr; }
  .gr-topic-card { min-height: 96px; }
  .gr-blog-intro { margin-top: -5px; }
}

/* ===== Lessons, quizzes and progress (v2.0) ===== */
[hidden] { display: none !important; }
.gr-topic-count { margin-top: 3px; color: var(--gr-teal); font-size: 11px; font-style: normal; font-weight: 750; }
.gr-breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; color: var(--gr-muted); font-size: 13px; }
.gr-breadcrumbs a { color: var(--gr-muted); font-weight: 650; }
.gr-breadcrumbs a:hover { color: var(--gr-primary); }
.gr-topic-header { display: flex; align-items: flex-start; gap: 22px; }
.gr-topic-header h1 { margin-bottom: 6px; }
.gr-topic-icon-lg { flex: 0 0 68px; width: 68px; height: 68px; border-radius: 20px; font-size: 24px; }
.gr-bar { height: 8px; overflow: hidden; border-radius: 20px; background: #e9edf6; }
.gr-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg,var(--gr-primary),var(--gr-teal)); transition: width .4s ease; }
.gr-topic-progress { max-width: 340px; margin: 14px 0 4px; }
.gr-topic-progress small { display: block; margin-top: 6px; color: var(--gr-muted); font-size: 12px; font-weight: 700; }
.gr-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 30px; }
.gr-chip { padding: 8px 14px; border: 1px solid var(--gr-border); border-radius: 999px; color: var(--gr-ink); font-size: 13px; font-weight: 700; }
.gr-chip:hover { border-color: #bdcafa; color: var(--gr-primary); }
.gr-chip small { margin-left: 4px; color: var(--gr-muted); }
.gr-lesson-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.gr-lesson-card { display: flex; gap: 16px; padding: 20px; border: 1px solid var(--gr-border); border-radius: var(--gr-radius); background: #fff; transition: .2s ease; }
.gr-lesson-card:hover { transform: translateY(-3px); border-color: #c5d2fb; box-shadow: var(--gr-shadow); }
.gr-lesson-card.is-done { background: #f7fdfb; border-color: #cdeee6; }
.gr-lesson-card-body { display: grid; gap: 5px; flex: 1; }
.gr-lesson-card-topic { color: var(--gr-teal); font-size: 11px; font-weight: 850; letter-spacing: .8px; text-transform: uppercase; }
.gr-lesson-card strong { color: var(--gr-ink); font-size: 17px; line-height: 1.35; }
.gr-lesson-card small { color: var(--gr-muted); font-size: 13px; line-height: 1.55; }
.gr-lesson-card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.gr-lesson-card-meta span { padding: 3px 9px; border-radius: 999px; background: var(--gr-soft); color: #51607a; font-size: 11px; font-weight: 700; }
.gr-lesson-card-meta .gr-done-tag { background: #e4faf5; color: #078a79; }
.gr-lesson-layout { display: grid; grid-template-columns: minmax(0,1fr) 310px; gap: 48px; align-items: start; }
.gr-lesson-header { margin-bottom: 8px; }
.gr-lesson-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; color: var(--gr-muted); font-size: 13px; font-weight: 650; }
.gr-badge { padding: 4px 11px; border-radius: 999px; background: #eaf0ff; color: var(--gr-primary); font-size: 12px; font-weight: 800; }
.gr-lesson .entry-content { font-size: 17px; }
.gr-lesson .entry-content mark { padding: 1px 6px; border-radius: 5px; color: #087e70; background: #c9f2e9; }
.gr-lesson .entry-content li { margin: 6px 0; }
.gr-lesson-aside { position: sticky; top: 98px; }
.gr-topic-box h3 a { color: var(--gr-ink); }
.gr-lesson-list { margin: 14px 0 0; padding: 0; list-style: none; counter-reset: lesson; }
.gr-lesson-list li { counter-increment: lesson; position: relative; padding: 8px 0 8px 34px; border-top: 1px solid var(--gr-border); }
.gr-lesson-list li:before { content: counter(lesson); position: absolute; left: 0; top: 9px; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: var(--gr-soft); color: var(--gr-muted); font-size: 11px; font-weight: 800; }
.gr-lesson-list li.is-done:before { content: "✓"; background: var(--gr-teal); color: #fff; }
.gr-lesson-list li.is-current:before { background: var(--gr-primary); color: #fff; }
.gr-lesson-list li.is-current.is-done:before { content: "✓"; }
.gr-lesson-list a { color: #3d4960; font-size: 14px; font-weight: 650; }
.gr-lesson-list li.is-current a { color: var(--gr-primary); }
.gr-quiz { margin: 46px 0 28px; padding: 32px; border: 1px solid var(--gr-border); border-radius: 22px; background: var(--gr-soft); }
.gr-quiz-head h2 { margin: 6px 0 4px; font-size: 28px; letter-spacing: -.8px; }
.gr-quiz-head p { margin: 0 0 8px; color: var(--gr-muted); font-size: 13px; }
.gr-question { margin: 20px 0 0; padding: 22px; border: 1px solid var(--gr-border); border-radius: 16px; background: #fff; }
.gr-question legend { display: flex; gap: 12px; align-items: flex-start; float: left; width: 100%; padding: 0; margin-bottom: 14px; color: var(--gr-ink); font-size: 17px; font-weight: 750; line-height: 1.45; }
.gr-question legend + * { clear: both; }
.gr-q-num { flex: 0 0 28px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; background: var(--gr-primary); color: #fff; font-size: 13px; }
.gr-option { display: flex; align-items: center; gap: 12px; margin-top: 9px; padding: 12px 14px; border: 1px solid var(--gr-border); border-radius: 12px; color: #3e4b63; cursor: pointer; transition: .15s ease; }
.gr-option:hover { border-color: #bdcafa; background: #f8faff; }
.gr-option input { position: absolute; opacity: 0; pointer-events: none; }
.gr-option-key { flex: 0 0 26px; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 8px; background: #edf1ff; color: var(--gr-primary); font-size: 12px; font-weight: 800; }
.gr-option:has(input:checked) { border-color: var(--gr-primary); background: #f1f5ff; }
.gr-option:has(input:checked) .gr-option-key { background: var(--gr-primary); color: #fff; }
.gr-option:has(input:focus-visible) { outline: 2px solid #9fb3f7; outline-offset: 2px; }
.gr-option.is-correct { border-color: #a8e6d9 !important; background: #f0fcf9 !important; }
.gr-option.is-correct .gr-option-key { background: var(--gr-teal) !important; color: #fff !important; }
.gr-option.is-wrong { border-color: #f0b8b0 !important; background: #fff2f0 !important; }
.gr-option.is-wrong .gr-option-key { background: #d9534f !important; color: #fff !important; }
.gr-feedback { margin-top: 12px; padding: 11px 14px; border-radius: 10px; font-size: 14px; }
.gr-feedback.is-correct { background: #eafaf5; color: #087c68; }
.gr-feedback.is-wrong { background: #fff2f0; color: #a33c30; }
.gr-quiz-actions { margin-top: 22px; }
.gr-quiz-actions .button { cursor: pointer; }
.gr-quiz-result { margin-top: 22px; padding: 22px 24px; border-radius: 16px; background: #fff; border: 1px solid var(--gr-border); }
.gr-quiz-result.is-pass { border-color: #a8e6d9; background: #f0fcf9; }
.gr-quiz-result.is-fail { border-color: #f6dfb2; background: #fffaf0; }
.gr-quiz-result.is-error { border-color: #f0b8b0; background: #fff2f0; color: #a33c30; }
.gr-quiz-result .gr-score { display: block; margin-bottom: 6px; font-size: 22px; letter-spacing: -.5px; }
.gr-quiz-result p { margin: 6px 0; }
.gr-quiz-note { color: var(--gr-muted); font-size: 13px; }
.gr-quiz-result .button { margin-top: 10px; cursor: pointer; }
.gr-complete { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 28px 0; padding: 22px 26px; border: 1px solid var(--gr-border); border-radius: 18px; }
.gr-complete p { margin: 3px 0 0; color: var(--gr-muted); font-size: 13px; }
.gr-complete.is-done { border-color: #a8e6d9; background: #f0fcf9; }
.gr-complete .button { cursor: pointer; white-space: nowrap; }
.gr-lesson-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 30px; }
.gr-lesson-nav-link { display: grid; gap: 3px; padding: 16px 18px; border: 1px solid var(--gr-border); border-radius: 14px; }
.gr-lesson-nav-link:hover { border-color: #bdcafa; box-shadow: var(--gr-shadow); }
.gr-lesson-nav-link small { color: var(--gr-muted); font-size: 12px; font-weight: 700; }
.gr-lesson-nav-link strong { color: var(--gr-ink); }
.gr-lesson-nav-link.is-next { text-align: right; grid-column: 2; }
.gr-progress { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--gr-border); }
.gr-progress h3 { margin: 0 0 14px; font-size: 20px; }
.gr-progress h4 { margin: 24px 0 8px; font-size: 15px; }
.gr-stat-row { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.gr-stat { padding: 16px 18px; border-radius: 14px; background: var(--gr-soft); }
.gr-stat strong { display: block; font-size: 26px; line-height: 1.2; letter-spacing: -.8px; }
.gr-stat span { color: var(--gr-muted); font-size: 12px; font-weight: 700; }
.gr-topic-bars, .gr-recent { margin: 18px 0; padding: 0; list-style: none; }
.gr-topic-bars li { display: grid; grid-template-columns: 150px 1fr 40px; align-items: center; gap: 12px; margin: 9px 0; font-size: 13px; }
.gr-topic-bars a { font-weight: 700; }
.gr-topic-bars em { color: var(--gr-muted); font-size: 12px; font-style: normal; text-align: right; }
.gr-recent li { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-top: 1px solid var(--gr-border); font-size: 14px; }
.gr-recent span { color: var(--gr-muted); font-size: 12px; }
@media (max-width: 900px) {
  .gr-lesson-layout { grid-template-columns: 1fr; gap: 28px; }
  .gr-lesson-aside { position: static; }
  .gr-lesson-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .gr-topic-header { flex-direction: column; gap: 14px; }
  .gr-quiz { padding: 20px 16px; }
  .gr-question { padding: 16px; }
  .gr-complete { flex-direction: column; align-items: flex-start; }
  .gr-lesson-nav { grid-template-columns: 1fr; }
  .gr-lesson-nav-link.is-next { grid-column: auto; text-align: left; }
  .gr-topic-bars li { grid-template-columns: 1fr 40px; }
  .gr-topic-bars .gr-bar { grid-column: 1 / -1; grid-row: 2; }
}
.gr-chip.is-active { border-color: var(--gr-primary); background: var(--gr-primary); color: #fff; }
.gr-chip.is-active small { color: rgba(255,255,255,.8); }
.gr-blog-chips { margin: 0 0 28px; }
.gr-skill-cards .gr-topic-count { margin-top: 4px; }