:root{
  --tutorial-bg:#07111c;--tutorial-surface:#0b1926;--tutorial-surface-2:#102131;
  --tutorial-line:rgba(158,190,216,.14);--tutorial-text:#f4f8fb;--tutorial-muted:#95aabd;
  --tutorial-accent:#338bd6;--tutorial-accent-soft:rgba(51,139,214,.12);--tutorial-green:#61cf8d;
  --tutorial-font:"Segoe UI Variable Text","Segoe UI",system-ui,-apple-system,BlinkMacSystemFont,Arial,sans-serif;
  --tutorial-display:"Segoe UI Variable Display","Segoe UI",system-ui,Arial,sans-serif;--tutorial-shell:1180px
}
*{box-sizing:border-box}html{background:var(--tutorial-bg);color-scheme:dark}body{margin:0;background:var(--tutorial-bg);color:var(--tutorial-text);font-family:var(--tutorial-font);font-size:16px;line-height:1.68;-webkit-font-smoothing:antialiased}a{color:#78c3f2}a:hover{color:#b0ddf8}img{max-width:100%}
.tutorial-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;padding:0 max(24px,calc((100vw - var(--tutorial-shell))/2));border-bottom:1px solid var(--tutorial-line);background:rgba(6,14,23,.95);backdrop-filter:blur(16px)}.tutorial-brand{color:#fff;font:750 18px/1 var(--tutorial-display);text-decoration:none}.tutorial-brand span{margin-inline-end:7px;color:#78bff0}.tutorial-header nav{display:flex;align-items:center;gap:3px;flex-wrap:wrap}.tutorial-header nav a{padding:8px 10px;border-radius:6px;color:#b9c8d5;font-size:13px;text-decoration:none}.tutorial-header nav a:hover{background:rgba(255,255,255,.055);color:#fff}
.tutorial-shell{width:min(var(--tutorial-shell),calc(100% - 48px));margin-inline:auto;padding:30px 0 70px}.breadcrumbs{display:flex;gap:8px;align-items:center;margin-bottom:20px;color:#71879a;font-size:12px}.breadcrumbs a{color:#83c7f1;text-decoration:none}.tutorial-hero{max-width:900px;padding:24px 0 30px}.index-hero{max-width:880px}.eyebrow,.card-category{color:#68b8e9;font-size:10px;font-weight:820;letter-spacing:.08em;text-transform:uppercase}.tutorial-hero h1{margin:8px 0 14px;color:#fff;font:760 clamp(38px,5vw,58px)/1.08 var(--tutorial-display);letter-spacing:-.04em}.lead{max-width:790px;margin:0;color:var(--tutorial-muted);font-size:18px;line-height:1.7}.tutorial-index-image{display:block;width:100%;max-height:560px;aspect-ratio:16/8.5;object-fit:cover;object-position:top;margin:22px 0 6px;border:1px solid var(--tutorial-line);border-radius:11px;background:#081522;box-shadow:0 18px 44px rgba(0,0,0,.22)}
.search-label{display:block;margin-top:22px;color:#c2d0db;font-size:12px;font-weight:690}.tutorial-search{width:100%;min-height:46px;margin-top:6px;padding:0 14px;border:1px solid #304558;border-radius:7px;outline:0;background:#0b1926;color:#fff}.tutorial-search:focus{border-color:#4a92cb;box-shadow:0 0 0 3px rgba(51,139,214,.1)}.tutorial-filter-bar{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}.tutorial-filter-bar button{min-height:34px;padding:0 12px;border:1px solid #293e50;border-radius:999px;background:#0b1926;color:#9fb2c2;font:inherit;font-size:11px;font-weight:680;cursor:pointer}.tutorial-filter-bar button:hover,.tutorial-filter-bar button.active{border-color:#4b7595;background:#10283a;color:#fff}.tutorial-result-meta{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:18px 0;color:#788ea0;font-size:12px}.tutorial-result-meta strong{color:#d9e4ec}
.tutorial-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.tutorial-card{display:flex;flex-direction:column;min-width:0;padding:14px;border:1px solid var(--tutorial-line);border-radius:9px;background:var(--tutorial-surface);color:var(--tutorial-text);text-decoration:none;transition:border-color .15s ease,background-color .15s ease}.tutorial-card:hover{border-color:#3c6482;background:#0e2030}.tutorial-card[hidden]{display:none}.tutorial-card img{width:100%;aspect-ratio:16/9;object-fit:cover;object-position:top;border:1px solid rgba(158,190,216,.1);border-radius:6px;background:#07111c}.tutorial-card h2{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;margin:11px 0 0;color:#fff;font:720 17px/1.3 var(--tutorial-display);letter-spacing:-.02em}.tutorial-card p{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;margin:7px 0 0;color:#8499ab;font-size:12px;line-height:1.55}.card-link{margin-top:auto;padding-top:12px;color:#79c3f1;font-size:11px;font-weight:720}.empty-state{grid-column:1/-1;padding:28px;border:1px dashed var(--tutorial-line);border-radius:8px;color:var(--tutorial-muted);text-align:center}.tutorial-load-wrap{display:flex;justify-content:center;margin-top:24px}.tutorial-load-more{min-width:210px;min-height:43px;padding:0 18px;border:1px solid #365a76;border-radius:8px;background:#0e1e2c;color:#e0eaf1;font:inherit;font-size:13px;font-weight:720;cursor:pointer}.tutorial-load-more:hover{border-color:#4d7898;background:#132739}.tutorial-load-more[hidden]{display:none}
.video-card,.content-card,.aside-card{border:1px solid var(--tutorial-line);border-radius:9px;background:var(--tutorial-surface)}.video-card{padding:12px;margin:8px 0 26px}.video-frame{overflow:hidden;aspect-ratio:16/9;border-radius:6px;background:#000}.video-frame iframe{width:100%;height:100%;border:0}.direct-video{display:inline-block;padding:9px 2px 0;color:#79c3f1;font-size:12px;font-weight:720;text-decoration:none}.tutorial-content{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:start}.tutorial-main{display:grid;gap:16px}.content-card,.aside-card{padding:22px}.content-card h2,.aside-card h2,.tutorial-cta h2{margin:0 0 10px;color:#fff;font-family:var(--tutorial-display);line-height:1.3}.content-card p{color:var(--tutorial-muted)}.content-card img{display:block;width:100%;margin-top:18px;border:1px solid rgba(158,190,216,.1);border-radius:7px}.content-card ol,.content-card ul{padding-inline-start:24px}.content-card li{margin:8px 0}.note-card{border-color:rgba(232,182,93,.28)}.tutorial-aside{position:sticky;top:88px;display:grid;gap:14px}.aside-card{display:grid;gap:7px}.aside-card a,.related-links a{color:#7bc4f1;text-decoration:none}.related-links{display:grid;gap:8px}
.tutorial-cta{margin-top:30px;padding:24px;border:1px solid rgba(51,139,214,.28);border-radius:9px;background:linear-gradient(120deg,rgba(51,139,214,.13),rgba(97,207,141,.06))}.tutorial-cta a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;margin-inline-end:8px;padding:0 14px;border:1px solid #4399df;border-radius:7px;background:#338bd6;color:#fff;font-size:12px;font-weight:720;text-decoration:none}.tutorial-footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:22px max(24px,calc((100vw - var(--tutorial-shell))/2));border-top:1px solid var(--tutorial-line);background:#050c13;color:#71879a;font-size:12px}.tutorial-footer a{color:#9abfd8;text-decoration:none}.tutorial-language-links{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 16px}.tutorial-language-links a{display:inline-flex;padding:7px 10px;border:1px solid #2e4558;border-radius:999px;color:#a8bbc9;text-decoration:none;font-size:11px}.tutorial-language-links a.active{border-color:#4b7798;background:#10283a;color:#fff}.tutorial-video-note{margin:10px 0 0;color:#7d91a3;font-size:12px}
@media(max-width:940px){.tutorial-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tutorial-content{grid-template-columns:1fr}.tutorial-aside{position:static}}
@media(max-width:680px){.tutorial-header{position:static;align-items:flex-start;flex-direction:column;padding:14px}.tutorial-header nav{gap:2px}.tutorial-shell{width:min(100% - 28px,var(--tutorial-shell));padding:22px 0 52px}.tutorial-hero h1{font-size:36px}.lead{font-size:16px}.tutorial-index-image{aspect-ratio:16/10}.tutorial-grid{grid-template-columns:1fr}.tutorial-filter-bar{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}.tutorial-filter-bar button{flex:0 0 auto}.tutorial-result-meta{align-items:flex-start;flex-direction:column}.content-card,.aside-card{padding:18px}.tutorial-footer{padding-inline:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}