:root{--bg:#07080f;--bg2:#0d0f1a;--bg3:#141727;--text:#f0f2ff;--muted:#a1abc8;--sky:#7ee8fa;--mint:#56f0c0;--border:rgba(255,255,255,.12);--border2:rgba(255,255,255,.22)}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 'DM Sans',system-ui,sans-serif}
a{color:var(--sky);text-underline-offset:4px}
button,input,select{font:inherit}
button,select{cursor:pointer}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--sky);outline-offset:4px}
[hidden]{display:none!important}
h1,h2,h3,.eyebrow,.badge{font-family:Manrope,system-ui,sans-serif}
h1{font-size:clamp(32px,5vw,54px);line-height:1.15;letter-spacing:-.03em;margin:14px 0 20px}
h2{font-size:clamp(24px,3vw,32px);line-height:1.3;margin:0 0 12px}
h3{line-height:1.4}
p{margin:0 0 18px}
img{max-width:100%}
main{max-width:1100px;margin:auto;padding:42px 24px 72px}
.news-index{max-width:900px}
.reading-page{max-width:820px}
.skip-link{position:fixed;top:8px;left:12px;transform:translateY(-160%);padding:8px 16px;background:var(--bg);z-index:1100}
.skip-link:focus{transform:none}
.site-header{border-bottom:1px solid var(--border);background:var(--bg)}
nav{max-width:1400px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 24px;min-height:72px}
.logo{display:flex;flex-shrink:0}
.logo img{height:36px;width:auto}
.nav-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:flex-end}
.nav-actions>a{color:var(--muted);font-size:14px;text-decoration:none;min-height:44px;display:inline-flex;align-items:center}
.nav-actions>a:hover{color:var(--text)}
.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;color:var(--muted)}
.intro{max-width:720px;font-size:19px;color:var(--muted)}
.intro-links{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:30px;text-decoration:none;border:1px solid var(--border2);color:var(--text);background:var(--bg2);font-weight:600}
.button:hover{border-color:var(--sky)}
.button.primary{background:var(--sky);color:var(--bg);border-color:var(--sky)}
html[data-theme="light"] .button.primary{color:white}
.intro-note,.meta,.section-note,.caption,.level-note{color:var(--muted);font-size:14px}
.filter-panel{padding:24px;background:var(--bg2);border:1px solid var(--border);border-radius:18px;margin:32px 0}
.filter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.search-field{margin-bottom:20px}
.search-row{display:flex;gap:10px;align-items:center}
.search-row input{flex:1}
.search-row button{flex-shrink:0}
.search-hint{margin:0;color:var(--muted);font-size:13px}
.search-row input::placeholder{color:var(--muted);opacity:1}
.filter-field{display:flex;flex-direction:column;gap:6px}
.filter-field label{font-size:13px;font-weight:600}
.filter-field input,.filter-field select{width:100%;min-width:0;min-height:46px;padding:8px 12px;border:1px solid var(--border2);border-radius:10px;background:var(--bg);color:var(--text)}
.filter-bottom{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:18px}
.filter-bottom p{margin:0;color:var(--muted);font-size:14px}
.reset-filters{background:transparent}
.collection{margin-top:42px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:22px}
.section-head p{margin:0;max-width:610px}
.story-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.story-card{min-width:0;border:1px solid var(--border);border-radius:20px;overflow:hidden;background:var(--bg2)}
.story-card>a{display:block;text-decoration:none;color:var(--text);height:100%}
.story-card:hover{border-color:var(--sky)}
.story-card>a:focus-visible{outline-offset:-4px}
.story-image,.hero-image{display:block;width:100%;height:auto;object-fit:contain}
.card-body{padding:24px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.badge{display:inline-block;background:var(--bg3);border:1px solid var(--border2);color:var(--text);padding:4px 10px;border-radius:20px;font-size:12px;font-weight:700}
.badge.level{border-color:var(--sky);color:var(--sky)}
.story-card h3{font-size:23px;margin:8px 0 12px}
.story-card p{font-size:15px;color:var(--muted);margin-bottom:18px}
.story-card .meta{font-size:12px}
.story-card .read-link{margin-top:16px;display:block;color:var(--sky);font-size:14px;font-weight:700}
.latest-stories{gap:20px}
.latest-stories .card-body{padding:20px 22px 22px}
.latest-stories h3{font-size:20px}
.collection-stories{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.story-card--compact{border-radius:14px}
.story-card--compact .card-body{padding:14px 16px 16px}
.story-card--compact .badges{gap:5px;margin-bottom:8px}
.story-card--compact .badge{font-size:9px;padding:2px 7px}
.story-card--compact h3{font-size:16px;margin:0 0 8px}
.story-card--compact p{display:none}
.story-card--compact .meta{font-size:11px;line-height:1.6}
.story-card--compact .read-link{font-size:12px;margin-top:10px}
.empty-state{padding:32px;border:1px dashed var(--border2);border-radius:18px;text-align:center}
.empty-state p{color:var(--muted);margin:0}
.how-to{margin-top:48px;padding:28px;background:var(--bg2);border:1px solid var(--border);border-radius:18px}
.how-to p{color:var(--muted);margin:0}
.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:24px}
.article-head .meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin:20px 0}
.article-head .intro{font-size:18px}
.article-head .level-note{margin:20px 0 28px}
.article-figure{margin:0 0 32px}
.hero-image{border-radius:16px}
.article-figure figcaption{margin-top:10px}
.lesson-nav{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 32px}
.lesson-nav a{font-size:13px}
.lesson-section{scroll-margin-top:20px;margin-top:40px;padding-top:28px;border-top:1px solid var(--border)}
.reading-text p{font-size:18px;line-height:1.9}
.vocabulary-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:0;list-style:none}
.vocabulary-list li{padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--bg2)}
.vocabulary-list h3{font-size:17px;margin:0 0 6px}
.word-type{font-size:12px;font-weight:400;color:var(--muted)}
.vocabulary-list p{font-size:14px;margin:0 0 8px;color:var(--muted)}
.vocabulary-list .example{font-style:italic;margin:0;color:var(--text)}
.visual-panel{padding:24px;border:1px solid var(--border);border-radius:16px;background:var(--bg2);margin:28px 0}
.visual-panel h3{margin-top:0}
.chart{margin:22px 0}
.chart-row{margin:16px 0}
.chart-label{display:flex;justify-content:space-between;gap:12px;margin-bottom:6px;font-size:14px}
.chart-track{height:20px;border-radius:5px;background:var(--bg3);overflow:hidden;border:1px solid var(--border2)}
.chart-fill{height:100%;background:var(--sky);border-radius:3px}
.chart-axis{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
.chart-data{width:100%;border-collapse:collapse;font-size:14px;margin:16px 0}
.chart-data th,.chart-data td{padding:10px;text-align:left;border-bottom:1px solid var(--border2)}
.chart-data th{font-weight:600}
.chart-data caption{text-align:left;color:var(--muted);margin-bottom:6px}
.chart-details summary{cursor:pointer;color:var(--sky);font-size:14px}
.visual-panel p,.visual-panel figcaption{font-size:14px;color:var(--muted)}
.timeline,.process{list-style:none;margin:24px 0;padding:0}
.timeline li,.process li{position:relative;margin:0;padding:0 0 20px 28px;border-left:2px solid var(--sky)}
.timeline li:last-child,.process li:last-child{padding-bottom:0}
.timeline li:before,.process li:before{content:'';position:absolute;left:-7px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--sky)}
.timeline strong,.process strong{display:block;font-size:15px}
.timeline span,.process span{color:var(--muted);font-size:14px}
.questions{padding-left:24px}
.questions>li{margin:0 0 18px;padding-left:5px}
.questions details{margin-top:8px;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:10px 14px}
.questions summary{cursor:pointer;color:var(--sky);font-size:14px;font-weight:600}
.answer{margin:12px 0 4px;font-size:15px;color:var(--text)}
.discussion li{margin:12px 0}
.language-focus{padding:22px;background:var(--bg2);border:1px solid var(--border);border-radius:14px;margin-top:24px}
.language-focus h3{font-size:18px;margin:0 0 8px}
.language-focus p{font-size:15px;margin:0}
.sources-list{padding-left:22px}
.sources-list li{margin:14px 0;font-size:14px;overflow-wrap:anywhere}
.editor-note{color:var(--muted);font-size:14px}
.related-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.site-footer{border-top:1px solid var(--border);padding:28px 24px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.site-footer p{margin:0}
.site-footer a{color:var(--muted)}
.news-promo{margin:0 0 32px;padding:18px 22px;border:1px solid var(--border);border-radius:14px;color:var(--muted);font-size:15px}
.news-promo a{color:var(--sky);font-weight:700}

@media(max-width:800px){.collection-stories{grid-template-columns:repeat(2,minmax(0,1fr))}}

@media(max-width:760px){.filter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.section-head{align-items:flex-start;flex-direction:column}
.card-body{padding:20px}
}

@media(max-width:520px){nav{padding:12px 16px;gap:12px;align-items:flex-start}
.logo img{height:30px;margin-top:7px}
.nav-actions{gap:4px 12px;max-width:calc(100% - 104px)}
.nav-actions>a{font-size:12px}
main{padding:30px 16px 48px}
.intro{font-size:17px}
.story-grid,.vocabulary-list{grid-template-columns:minmax(0,1fr)}
.filter-panel{padding:18px}
.search-row{flex-wrap:wrap}
.search-row input{flex-basis:100%}
.filter-grid{grid-template-columns:minmax(0,1fr);gap:12px}
.filter-bottom{align-items:flex-start;flex-direction:column}
.article-head .meta{gap:8px}
.reading-text p{font-size:17px}
.visual-panel{padding:18px}
.how-to{padding:22px}
.site-footer{padding:24px 16px}
.latest-stories{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.latest-stories .card-body{padding:12px}
.latest-stories h3{font-size:16px}
.latest-stories .badges{gap:4px;margin-bottom:8px}
.latest-stories .badge{font-size:9px;padding:2px 6px}
.latest-stories p{display:none}
.latest-stories .meta{font-size:11px;line-height:1.6}
.latest-stories .read-link{font-size:12px;margin-top:10px}
.collection-stories{grid-template-columns:minmax(0,1fr);gap:12px}
.story-card--compact>a{display:grid;grid-template-columns:100px minmax(0,1fr);align-items:center}
.story-card--compact .story-image{width:88px;margin-left:12px;border-radius:9px}
.story-card--compact .card-body{padding:12px}
.story-card--compact h3{font-size:15px}
}

@media(max-width:360px){.latest-stories .card-body{padding:10px}
.latest-stories h3{font-size:15px}
.story-card--compact>a{grid-template-columns:88px minmax(0,1fr)}
.story-card--compact .story-image{width:76px}
}

@media(prefers-reduced-motion:no-preference){.story-card,.button{transition:border-color .15s}
}

.skip-link:not(:focus){clip-path:inset(50%);width:1px;height:1px;overflow:hidden;padding:0}