/* ── Reset ────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--primary);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;overflow:hidden;height:100dvh}
a{color:var(--accent);text-decoration:none}
button{border:none;background:none;cursor:pointer;font:inherit;color:inherit}
ul,ol{list-style:none}
img{max-width:100%;display:block}
input,select{font:inherit}

/* ── Theme Tokens ─────────────────────────────────── */
:root{
  --primary:#0A1628;--secondary:#4A5568;--accent:#FF6B4A;--accent-80:rgba(255,107,74,.8);
  --surface:#FFFFFF;--surface-elevated:#FFFFFF;--bg:#F7F8FA;--divider:#E2E8F0;
  --cat-news:#DC2626;--cat-sport:#059669;--cat-business:#D97706;--cat-tech:#2563EB;
  --cat-entertainment:#7C3AED;--cat-lifestyle:#EC4899;--cat-culture:#8B5CF6;--cat-science:#0891B2;
  --radius-sm:8px;--radius-md:14px;--radius-lg:18px;--radius-xl:24px;--radius-pill:100px;
  --shadow-subtle:0 2px 4px rgba(0,0,0,.04);--shadow-card:0 4px 12px rgba(0,0,0,.08);
  --shadow-elevated:0 10px 24px rgba(0,0,0,.18);
  --font-serif:Georgia,'Times New Roman',serif;
  --font-sans:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --spacing-xxs:4px;--spacing-xs:6px;--spacing-sm:8px;--spacing-md:12px;--spacing-base:16px;
  --spacing-lg:20px;--spacing-xl:24px;--spacing-xxl:32px;--spacing-xxxl:48px;
  --tab-height:56px;
}

/* Dark mode */
[data-theme="dark"]{
  --primary:#F5F5F7;--secondary:#A0AEC0;--accent:#FF8A6A;--accent-80:rgba(255,138,106,.8);
  --surface:#1A1A2E;--surface-elevated:#1E1E36;--bg:#0D0D1A;--divider:#2D2D4A;
  --cat-news:#F87171;--cat-sport:#34D399;--cat-business:#FBBF24;--cat-tech:#60A5FA;
  --cat-entertainment:#A78BFA;--cat-lifestyle:#F472B6;--cat-culture:#C4B5FD;--cat-science:#22D3EE;
}

/* ── App Shell ────────────────────────────────────── */
.app-shell{display:flex;flex-direction:column;height:100dvh;overflow:hidden}
.tab-content{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;position:relative}
.tab-panel{display:none;min-height:100%;padding-bottom:var(--spacing-xl)}
.tab-panel.active{display:block}

/* ── Tab Bar ──────────────────────────────────────── */
.tab-bar{
  display:flex;height:var(--tab-height);background:rgba(255,255,255,.85);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--divider);flex-shrink:0;padding-bottom:env(safe-area-inset-bottom,0);
}
[data-theme="dark"] .tab-bar{background:rgba(26,26,46,.85)}
.tab-btn{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:2px;font-size:10px;font-weight:500;color:var(--secondary);
  transition:color .2s;-webkit-tap-highlight-color:transparent;
}
.tab-btn svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab-btn.active{color:var(--accent)}
.tab-btn.active svg{stroke:var(--accent)}

/* ── Masthead ─────────────────────────────────────── */
.masthead{height:2px;background:var(--accent);width:100%}
.masthead-cat{height:2px;width:100%}

/* ── Page Header ──────────────────────────────────── */
.page-header{padding:var(--spacing-lg) var(--spacing-base) var(--spacing-md)}
.page-header h1{font-family:var(--font-sans);font-size:28px;font-weight:800;letter-spacing:-.5px}
.page-header h1.brand{
  background:linear-gradient(135deg,var(--accent),var(--accent-80));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.page-header .subtitle{font-size:13px;color:var(--secondary);margin-top:2px}
.page-header .date-row{display:flex;align-items:center;justify-content:space-between;margin-top:2px}
.unread-badge{font-size:12px;color:var(--accent);font-weight:600}

/* ── Section Header ───────────────────────────────── */
.section-header{
  display:flex;align-items:center;padding:var(--spacing-lg) var(--spacing-base) var(--spacing-sm);
  gap:var(--spacing-sm);
}
.section-header .accent-bar{width:4px;height:24px;border-radius:2px;flex-shrink:0}
.section-header h2{font-family:var(--font-sans);font-size:20px;font-weight:700;flex:1}
.section-header .count{font-size:13px;color:var(--secondary)}
.section-header .see-all{font-size:14px;color:var(--accent);font-weight:600;cursor:pointer;white-space:nowrap}

/* ── Category Pills Row ───────────────────────────── */
.cat-pills{display:flex;gap:var(--spacing-sm);padding:0 var(--spacing-base);overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.cat-pills::-webkit-scrollbar{display:none}
.cat-pill{
  font-size:12px;font-weight:600;padding:6px 14px;border-radius:var(--radius-pill);
  white-space:nowrap;color:#fff;cursor:pointer;transition:transform .2s,opacity .2s;flex-shrink:0;
}
.cat-pill:hover{transform:scale(1.05)}
.cat-pill.outline{background:transparent !important;color:var(--secondary);border:1.5px solid var(--divider)}
.cat-pill.outline.active{border-color:var(--accent);color:var(--accent)}

/* ── Hero Card ────────────────────────────────────── */
.hero-card{
  margin:var(--spacing-md) var(--spacing-base);border-radius:var(--radius-lg);
  overflow:hidden;position:relative;height:320px;cursor:pointer;
  box-shadow:var(--shadow-elevated);transition:transform .2s;
}
.hero-card:active{transform:scale(.97)}
.hero-card img{width:100%;height:100%;object-fit:cover}
.hero-card .overlay{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(0,0,0,.85) 0%,rgba(0,0,0,.4) 40%,rgba(0,0,0,.05) 70%,transparent 100%);
}
.hero-card .content{position:absolute;bottom:0;left:0;right:0;padding:var(--spacing-lg)}
.hero-card .source-badge{
  display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;
  padding:4px 10px;border-radius:var(--radius-pill);color:#fff;
  background:rgba(255,255,255,.15);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  margin-bottom:var(--spacing-sm);
}
.hero-card h3{font-family:var(--font-serif);font-size:22px;font-weight:700;color:#fff;line-height:1.25;margin-bottom:var(--spacing-xs);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.hero-card .summary{font-size:14px;color:rgba(255,255,255,.75);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hero-card .meta-bar{
  display:flex;align-items:center;gap:var(--spacing-sm);margin-top:var(--spacing-md);
  padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.1);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  font-size:12px;color:rgba(255,255,255,.7);
}
.hero-card .unread-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);flex-shrink:0}

/* ── Standard Card ────────────────────────────────── */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md);padding:0 var(--spacing-base)}
.standard-card{
  background:var(--surface);border-radius:var(--radius-md);overflow:hidden;
  box-shadow:var(--shadow-card);border:1px solid var(--divider);
  cursor:pointer;transition:transform .2s;
}
.standard-card:active{transform:scale(.97)}
.standard-card .img-wrap{position:relative;height:140px;overflow:hidden}
.standard-card .img-wrap img{width:100%;height:100%;object-fit:cover}
.standard-card .cat-bar{position:absolute;top:0;right:12px;width:4px;height:28px;border-radius:0 0 2px 2px}
.standard-card .card-body{padding:var(--spacing-md)}
.standard-card .card-body h4{font-family:var(--font-serif);font-size:15px;font-weight:600;line-height:1.3;margin-bottom:var(--spacing-xxs);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.standard-card .card-meta{display:flex;align-items:center;gap:var(--spacing-xxs);font-size:11px;color:var(--secondary)}
.standard-card .bookmark-icon{margin-left:auto;color:var(--secondary);font-size:14px}
.standard-card .bookmark-icon.active{color:var(--accent)}

/* ── Compact Card ─────────────────────────────────── */
.compact-card{
  display:flex;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-base);
  cursor:pointer;transition:background .15s;border-bottom:1px solid var(--divider);
}
.compact-card:active{background:rgba(0,0,0,.03)}
[data-theme="dark"] .compact-card:active{background:rgba(255,255,255,.03)}
.compact-card .thumb{width:72px;height:72px;border-radius:var(--radius-sm);overflow:hidden;flex-shrink:0}
.compact-card .thumb img{width:100%;height:100%;object-fit:cover}
.compact-card .card-info{flex:1;display:flex;flex-direction:column;justify-content:center;min-width:0}
.compact-card h4{font-family:var(--font-serif);font-size:15px;font-weight:600;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--spacing-xxs)}
.compact-card .card-meta{font-size:11px;color:var(--secondary);display:flex;align-items:center;gap:var(--spacing-xxs)}
.compact-card .cat-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.compact-card .chevron{color:var(--secondary);font-size:14px;align-self:center;flex-shrink:0}

/* ── Category Placeholder (no image) ──────────────── */
.cat-placeholder{
  display:flex;align-items:center;justify-content:center;
  font-size:32px;color:rgba(255,255,255,.5);
}
.cat-placeholder.small{font-size:20px}

/* ── Article Detail (Modal/Overlay) ───────────────── */
.article-overlay{
  position:fixed;inset:0;z-index:1000;background:var(--bg);overflow-y:auto;
  display:none;animation:slideUp .35s ease;
}
.article-overlay.open{display:block}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.article-close-bar{
  position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:var(--spacing-md) var(--spacing-base);
  background:rgba(255,255,255,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--divider);
}
[data-theme="dark"] .article-close-bar{background:rgba(13,13,26,.85)}
.article-close-bar .close-btn{font-size:24px;padding:4px 8px;color:var(--secondary)}
.article-close-bar .actions{display:flex;gap:var(--spacing-md)}
.article-close-bar .actions button{font-size:18px;color:var(--secondary);padding:4px}
.article-hero-img{width:100%;height:320px;object-fit:cover;position:relative}
.article-hero-wrap{position:relative}
.article-hero-wrap .fade{position:absolute;bottom:0;left:0;right:0;height:80px;background:linear-gradient(transparent,var(--bg))}
.article-content{max-width:720px;margin:0 auto;padding:0 var(--spacing-xl) var(--spacing-xxxl)}
.article-content .cat-badge{
  display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;
  padding:4px 12px;border-radius:var(--radius-pill);color:#fff;margin-bottom:var(--spacing-md);
}
.article-content h1{font-family:var(--font-serif);font-size:28px;font-weight:700;line-height:1.2;margin-bottom:var(--spacing-md)}
.article-content .meta-row{display:flex;align-items:center;gap:var(--spacing-sm);font-size:13px;color:var(--secondary);margin-bottom:var(--spacing-lg);flex-wrap:wrap}
.article-content .divider{height:1px;background:var(--divider);margin:var(--spacing-lg) 0}
.article-content .article-body{font-family:var(--font-serif);font-size:17px;line-height:1.8;color:var(--secondary)}
.article-content .article-body p{margin-bottom:var(--spacing-base)}
.article-content .read-full-btn{
  display:block;width:100%;padding:16px;border-radius:var(--radius-md);
  color:#fff;font-weight:700;font-size:16px;text-align:center;
  margin:var(--spacing-xxl) 0;transition:transform .2s;
}
.article-content .read-full-btn:hover{transform:scale(1.02);text-decoration:none}

/* ── Categories Browse ────────────────────────────── */
.category-browse-card{
  display:flex;align-items:center;gap:var(--spacing-base);
  padding:var(--spacing-base);margin:0 var(--spacing-base) var(--spacing-md);
  background:var(--surface);border-radius:var(--radius-md);
  box-shadow:var(--shadow-subtle);border:1px solid var(--divider);
  cursor:pointer;transition:transform .2s,box-shadow .2s;
}
.category-browse-card:active{transform:scale(.98)}
.category-browse-card .cat-icon{
  width:48px;height:48px;border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;flex-shrink:0;
}
.category-browse-card .cat-info{flex:1;min-width:0}
.category-browse-card .cat-info h3{font-size:16px;font-weight:700}
.category-browse-card .cat-info p{font-size:13px;color:var(--secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.category-browse-card .cat-count{font-size:13px;color:var(--secondary);font-weight:600;flex-shrink:0}
.category-browse-card .chevron-r{color:var(--secondary);font-size:14px;flex-shrink:0}

/* ── Category Feed Sub-view ───────────────────────── */
.category-feed-view{display:none;min-height:100%}
.category-feed-view.active{display:block}
.cat-feed-banner{
  padding:var(--spacing-xl) var(--spacing-base);display:flex;align-items:center;gap:var(--spacing-base);
}
.cat-feed-banner .icon{width:56px;height:56px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.cat-feed-banner .info h2{font-size:24px;font-weight:800}
.cat-feed-banner .info span{font-size:13px;color:var(--secondary)}
.view-toggle{display:flex;gap:var(--spacing-sm);padding:0 var(--spacing-base) var(--spacing-md)}
.view-toggle button{padding:6px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:600;color:var(--secondary);border:1.5px solid var(--divider);transition:all .2s}
.view-toggle button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.back-btn{display:flex;align-items:center;gap:4px;font-size:14px;color:var(--accent);font-weight:600;padding:var(--spacing-md) var(--spacing-base);cursor:pointer}

/* ── Feeds List ───────────────────────────────────── */
.feeds-stats{
  display:flex;gap:var(--spacing-base);padding:var(--spacing-md) var(--spacing-base);
}
.stat-box{
  flex:1;background:var(--surface);border-radius:var(--radius-md);padding:var(--spacing-md);
  text-align:center;box-shadow:var(--shadow-subtle);border:1px solid var(--divider);
}
.stat-box .num{font-size:24px;font-weight:800;color:var(--accent)}
.stat-box .label{font-size:11px;color:var(--secondary);text-transform:uppercase;font-weight:600;letter-spacing:.3px}
.feed-group-header{
  font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.3px;
  color:var(--secondary);padding:var(--spacing-lg) var(--spacing-base) var(--spacing-sm);
}
.feed-item{
  display:flex;align-items:center;gap:var(--spacing-md);
  padding:var(--spacing-md) var(--spacing-base);border-bottom:1px solid var(--divider);
}
.feed-item .feed-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.feed-item .feed-info{flex:1;min-width:0}
.feed-item .feed-info h4{font-size:15px;font-weight:600}
.feed-item .feed-info span{font-size:12px;color:var(--secondary)}
/* Toggle switch */
.toggle{position:relative;width:44px;height:26px;flex-shrink:0}
.toggle input{display:none}
.toggle .slider{
  position:absolute;inset:0;background:var(--divider);border-radius:13px;
  cursor:pointer;transition:background .3s;
}
.toggle .slider::before{
  content:'';position:absolute;width:22px;height:22px;border-radius:50%;
  background:#fff;left:2px;top:2px;transition:transform .3s;box-shadow:0 1px 3px rgba(0,0,0,.2);
}
.toggle input:checked+.slider{background:var(--accent)}
.toggle input:checked+.slider::before{transform:translateX(18px)}

/* ── Bookmarks ────────────────────────────────────── */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:var(--spacing-xxxl) var(--spacing-base);text-align:center;color:var(--secondary);
}
.empty-state .icon{font-size:48px;margin-bottom:var(--spacing-base);opacity:.4}
.empty-state h3{font-size:20px;font-weight:700;color:var(--primary);margin-bottom:var(--spacing-sm)}
.empty-state p{font-size:15px;max-width:280px}

/* ── Search ───────────────────────────────────────── */
.search-bar{
  margin:var(--spacing-md) var(--spacing-base);position:relative;
}
.search-bar input{
  width:100%;padding:12px 16px 12px 40px;border-radius:var(--radius-md);
  border:1.5px solid var(--divider);background:var(--surface);font-size:15px;
  color:var(--primary);outline:none;transition:border-color .2s;
}
.search-bar input:focus{border-color:var(--accent)}
.search-bar input::placeholder{color:var(--secondary)}
.search-bar .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--secondary);font-size:16px}
.recent-searches{padding:var(--spacing-sm) var(--spacing-base)}
.recent-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-sm)}
.recent-header h3{font-size:15px;font-weight:700}
.recent-header button{font-size:13px;color:var(--accent);font-weight:600}
.recent-item{
  display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) 0;
  cursor:pointer;color:var(--secondary);font-size:14px;
}
.recent-item:hover{color:var(--primary)}
.recent-item .remove{margin-left:auto;font-size:16px;color:var(--secondary);padding:4px}
.search-results-count{padding:var(--spacing-sm) var(--spacing-base);font-size:13px;color:var(--secondary);font-weight:600}

/* ── Settings ─────────────────────────────────────── */
.settings-group{margin:var(--spacing-lg) var(--spacing-base) 0}
.settings-group-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.3px;color:var(--secondary);margin-bottom:var(--spacing-sm)}
.settings-card{background:var(--surface);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-subtle);border:1px solid var(--divider)}
.settings-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:var(--spacing-md) var(--spacing-base);border-bottom:1px solid var(--divider);
}
.settings-row:last-child{border-bottom:none}
.settings-row .label{font-size:15px;font-weight:500}
.settings-row .value{font-size:14px;color:var(--secondary)}
.settings-row select{
  padding:6px 12px;border-radius:var(--radius-sm);border:1.5px solid var(--divider);
  background:var(--bg);color:var(--primary);font-size:14px;
}
.settings-row .danger-btn{
  padding:8px 16px;border-radius:var(--radius-sm);background:var(--cat-news);
  color:#fff;font-weight:600;font-size:14px;
}
.settings-about{text-align:center;padding:var(--spacing-xxl) var(--spacing-base);color:var(--secondary);font-size:13px}
.settings-about .brand{
  font-size:28px;font-weight:900;letter-spacing:-.5px;
  background:linear-gradient(135deg,var(--accent),var(--accent-80));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:var(--spacing-xxs);
}
.settings-about .tagline{font-size:14px;margin-bottom:var(--spacing-sm)}

/* ── Shimmer / Loading ────────────────────────────── */
.shimmer{background:var(--divider);border-radius:var(--radius-sm);position:relative;overflow:hidden}
.shimmer::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.4) 50%,transparent 100%);
  animation:shimmer 1.5s infinite;
}
@keyframes shimmer{from{transform:translateX(-100%)}to{transform:translateX(100%)}}
.shimmer-hero{height:320px;margin:var(--spacing-md) var(--spacing-base);border-radius:var(--radius-lg)}
.shimmer-card{height:240px;border-radius:var(--radius-md)}
.shimmer-compact{height:72px;margin:0 var(--spacing-base);border-radius:var(--radius-sm)}

/* ── Loading Spinner ──────────────────────────────── */
.loading-bar{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:9999;
  background:linear-gradient(90deg,var(--accent),var(--accent-80));
  transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.loading-bar.active{animation:loadBar 2s ease infinite}
@keyframes loadBar{0%{transform:scaleX(0);transform-origin:left}50%{transform:scaleX(1);transform-origin:left}51%{transform-origin:right}100%{transform:scaleX(0);transform-origin:right}}

/* ── Responsive ───────────────────────────────────── */
@media(min-width:768px){
  .card-grid{grid-template-columns:repeat(3,1fr)}
  .hero-card{height:400px}
  .hero-card h3{font-size:28px}
  .article-content h1{font-size:36px}
  .article-hero-img{height:450px}
}
@media(min-width:1024px){
  .tab-content{max-width:960px;margin:0 auto}
  .card-grid{grid-template-columns:repeat(3,1fr)}
}

/* ── Refresh indicator ────────────────────────────── */
.refresh-indicator{
  text-align:center;padding:var(--spacing-sm);font-size:12px;
  color:var(--secondary);font-weight:500;
}