/* Tarasov Code — interaction, motion & gamification layer */
:root{--tcx-accent:#e58e64;--tcx-accent-2:#f2c27b;--tcx-glow:rgba(229,142,100,.35);--tcx-surface:rgba(30,29,27,.86);--tcx-border:rgba(238,233,223,.14);--tcx-text:var(--paper,#eee9df);--tcx-muted:var(--paper-muted,#bcb5a9);--tcx-ease:cubic-bezier(.2,.8,.2,1)}
:root[data-theme=light]{--tcx-surface:rgba(255,252,247,.92);--tcx-border:rgba(36,35,33,.14);--tcx-glow:rgba(201,120,84,.25)}

/* Scroll progress */
.tcx-progress{position:fixed;inset:0 0 auto 0;height:3px;z-index:1000;pointer-events:none;background:transparent}
.tcx-progress span{display:block;height:100%;width:100%;transform-origin:0 50%;transform:scaleX(var(--p,0));background:linear-gradient(90deg,var(--tcx-accent),var(--tcx-accent-2));box-shadow:0 0 12px var(--tcx-glow)}

/* Ambient background */
body{position:relative}
.tcx-aurora{position:fixed;inset:-20vmax;z-index:-1;pointer-events:none;opacity:.55;background:radial-gradient(40vmax 30vmax at 15% 10%,rgba(229,142,100,.10),transparent 60%),radial-gradient(35vmax 30vmax at 85% 20%,rgba(184,195,165,.07),transparent 60%),radial-gradient(40vmax 35vmax at 60% 95%,rgba(242,194,123,.06),transparent 60%);animation:tcx-drift 28s ease-in-out infinite alternate}
@keyframes tcx-drift{to{transform:translate3d(3vmax,-2vmax,0) rotate(4deg)}}

/* Reveal on scroll — content is only hidden once JS has confirmed it can reveal it */
.tcx-ready .tcx-reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--tcx-ease),transform .6s var(--tcx-ease);transition-delay:var(--d,0ms)}
.tcx-ready .tcx-reveal.is-in{opacity:1;transform:none}

/* Cards: spotlight + tilt */
.tcx-spot{position:relative;isolation:isolate;transition:transform .35s var(--tcx-ease),box-shadow .35s var(--tcx-ease),border-color .35s}
.tcx-spot::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:2;opacity:0;transition:opacity .3s;background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(229,142,100,.14),transparent 45%)}
.tcx-spot:hover::after{opacity:1}
.tcx-spot:hover{box-shadow:0 18px 40px -22px rgba(0,0,0,.6),0 0 0 1px rgba(229,142,100,.25)}
@media (hover:hover) and (pointer:fine){.tcx-spot.tcx-tilt{transform:perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) translateY(var(--ty,0))}}

/* Header achievements button */
.tcx-trophy{position:relative;display:inline-grid;place-items:center;width:40px;height:40px;border-radius:12px;border:1px solid var(--tcx-border);background:transparent;color:inherit;cursor:pointer;transition:background .2s,transform .2s}
.tcx-trophy:hover{background:rgba(229,142,100,.12);transform:translateY(-1px)}
.tcx-trophy svg{width:20px;height:20px}
.tcx-trophy[data-streak]::after{content:attr(data-streak);position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:linear-gradient(135deg,#ff9a5a,#e0533c);color:#fff;font:700 10px/18px var(--sans);text-align:center;box-shadow:0 2px 8px rgba(224,83,60,.5)}
.level-button.tcx-bump{animation:tcx-bump .6s var(--tcx-ease)}
@keyframes tcx-bump{30%{transform:scale(1.15)}60%{transform:scale(.96)}}

/* XP float */
.tcx-xp-pop{position:fixed;z-index:1200;pointer-events:none;font:800 15px var(--sans);color:var(--tcx-accent-2);text-shadow:0 2px 10px rgba(0,0,0,.5);animation:tcx-float 1.4s var(--tcx-ease) forwards}
@keyframes tcx-float{0%{opacity:0;transform:translate(-50%,8px) scale(.8)}20%{opacity:1;transform:translate(-50%,-6px) scale(1.1)}100%{opacity:0;transform:translate(-50%,-60px) scale(1)}}

/* Achievement toast */
.tcx-toasts{position:fixed;right:20px;bottom:20px;z-index:1100;display:grid;gap:10px;pointer-events:none}
.tcx-toast{pointer-events:auto;display:flex;gap:12px;align-items:center;min-width:260px;max-width:340px;padding:12px 16px;border-radius:14px;background:var(--tcx-surface);border:1px solid var(--tcx-border);backdrop-filter:blur(18px);color:var(--tcx-text);box-shadow:0 20px 50px -20px rgba(0,0,0,.7);animation:tcx-toast-in .5s var(--tcx-ease) both}
.tcx-toast.out{animation:tcx-toast-out .35s ease-in forwards}
.tcx-toast b{display:block;font-size:14px}.tcx-toast small{color:var(--tcx-muted);font-size:12px}
.tcx-toast .tcx-ico{font-size:26px;line-height:1;filter:drop-shadow(0 4px 10px var(--tcx-glow))}
@keyframes tcx-toast-in{from{opacity:0;transform:translateY(16px) scale(.96)}}
@keyframes tcx-toast-out{to{opacity:0;transform:translateX(30px)}}

/* Achievements dialog */
.tcx-dialog{width:min(760px,calc(100% - 24px));max-height:min(88vh,860px);padding:0;border:1px solid var(--tcx-border);border-radius:22px;background:var(--ink-raised,#2b2926);color:var(--tcx-text);box-shadow:0 40px 120px -30px rgba(0,0,0,.8);overflow:auto}
.tcx-dialog::backdrop{background:rgba(10,10,9,.6);backdrop-filter:blur(6px)}
.tcx-dialog[open]{animation:tcx-pop .45s var(--tcx-ease)}
@keyframes tcx-pop{from{opacity:0;transform:translateY(14px) scale(.97)}}
.tcx-dh{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;background:inherit;border-bottom:1px solid var(--tcx-border)}
.tcx-dh h2{margin:0;font-size:18px;letter-spacing:-.02em}
.tcx-x{border:1px solid var(--tcx-border);background:transparent;color:inherit;border-radius:10px;width:36px;height:36px;cursor:pointer;font-size:18px}
.tcx-db{padding:22px}
.tcx-hero{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:center;padding:20px;border-radius:18px;background:linear-gradient(135deg,rgba(229,142,100,.16),rgba(242,194,123,.05));border:1px solid rgba(229,142,100,.25)}
.tcx-ring{--v:0;width:108px;height:108px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--tcx-accent) calc(var(--v)*1%),rgba(238,233,223,.1) 0);position:relative;transition:--v 1s}
.tcx-ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--ink-raised,#2b2926)}
.tcx-ring span{position:relative;text-align:center;line-height:1.05}.tcx-ring b{display:block;font-size:30px}.tcx-ring small{font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--tcx-muted)}
.tcx-hero h3{margin:0 0 4px;font-size:22px;letter-spacing:-.03em}.tcx-hero p{margin:0;color:var(--tcx-muted);font-size:14px}
.tcx-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:16px 0 4px}
.tcx-stat{padding:12px;border-radius:12px;border:1px solid var(--tcx-border);background:rgba(238,233,223,.03)}
.tcx-stat b{display:block;font-size:20px}.tcx-stat small{color:var(--tcx-muted);font-size:11px}
.tcx-sec{margin:24px 0 10px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--tcx-muted)}
.tcx-quests{display:grid;gap:8px}
.tcx-quest{display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:12px;border:1px solid var(--tcx-border);text-decoration:none;color:inherit;transition:border-color .2s,background .2s}
.tcx-quest:hover{border-color:rgba(229,142,100,.5);background:rgba(229,142,100,.06)}
.tcx-quest .tcx-check{flex:none;width:24px;height:24px;border-radius:50%;border:2px solid var(--tcx-border);display:grid;place-items:center;font-size:13px}
.tcx-quest.done .tcx-check{background:var(--green,#b8c3a5);border-color:transparent;color:#1d1c1a}
.tcx-quest.done span:nth-child(2){text-decoration:line-through;opacity:.6}
.tcx-quest em{margin-left:auto;font-style:normal;font-weight:700;color:var(--tcx-accent-2);font-size:13px}
.tcx-badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.tcx-badge{padding:14px;border-radius:14px;border:1px solid var(--tcx-border);text-align:center;transition:transform .25s var(--tcx-ease)}
.tcx-badge:hover{transform:translateY(-3px)}
.tcx-badge .tcx-ico{font-size:30px;display:block;margin-bottom:6px}
.tcx-badge b{display:block;font-size:13px}.tcx-badge small{display:block;color:var(--tcx-muted);font-size:11px;line-height:1.4;margin-top:3px}
.tcx-badge.locked{opacity:.45}.tcx-badge.locked .tcx-ico{filter:grayscale(1)}
.tcx-badge.got{border-color:rgba(229,142,100,.45);background:linear-gradient(180deg,rgba(229,142,100,.1),transparent)}
.tcx-bar{height:6px;border-radius:3px;background:rgba(238,233,223,.1);overflow:hidden;margin-top:8px}.tcx-bar i{display:block;height:100%;background:var(--tcx-accent);border-radius:inherit}
.tcx-note{margin-top:18px;font-size:12px;color:var(--tcx-muted)}
@media(max-width:600px){.tcx-hero{grid-template-columns:1fr;text-align:center;justify-items:center}.tcx-stats{grid-template-columns:repeat(2,1fr)}}

/* Shortcuts */
.tcx-keys{display:grid;gap:8px}.tcx-keys div{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid var(--tcx-border)}
.tcx-keys kbd{font:600 12px var(--sans);padding:3px 8px;border-radius:6px;border:1px solid var(--tcx-border);background:rgba(238,233,223,.06)}

/* Back to top with ring */
.tcx-top{position:fixed;left:20px;bottom:20px;z-index:900;width:46px;height:46px;border-radius:50%;border:0;cursor:pointer;color:var(--tcx-text);background:conic-gradient(var(--tcx-accent) calc(var(--p,0)*360deg),var(--tcx-border) 0);display:grid;place-items:center;opacity:0;transform:translateY(16px);pointer-events:none;transition:opacity .3s,transform .3s}
.tcx-top::before{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--ink-raised,#2b2926)}
.tcx-top span{position:relative;font-size:18px}
.tcx-top.show{opacity:1;transform:none;pointer-events:auto}

/* Reading helpers */
.tcx-readpill{position:fixed;left:50%;bottom:18px;z-index:900;transform:translate(-50%,30px);opacity:0;display:flex;gap:12px;align-items:center;padding:8px 10px 8px 16px;border-radius:30px;background:var(--tcx-surface);border:1px solid var(--tcx-border);backdrop-filter:blur(16px);font-size:12px;color:var(--tcx-muted);transition:opacity .35s,transform .35s var(--tcx-ease);box-shadow:0 16px 40px -18px rgba(0,0,0,.7)}
.tcx-readpill.show{opacity:1;transform:translate(-50%,0)}
.tcx-readpill button{border:0;border-radius:20px;padding:7px 12px;font-size:12px;font-weight:700;cursor:pointer;background:rgba(229,142,100,.16);color:var(--tcx-text)}
.tcx-readpill button:hover{background:rgba(229,142,100,.3)}
@media(max-width:600px){.tcx-readpill{bottom:12px;max-width:calc(100% - 24px)}.tcx-top{left:12px;bottom:70px;width:40px;height:40px}.tcx-toasts{right:12px;left:12px;bottom:12px}.tcx-toast{max-width:none}}

/* Confetti canvas */
.tcx-confetti{position:fixed;inset:0;z-index:1300;pointer-events:none}

/* Animated counters & home hero fixes */
.tc-home-hero .tc-hero-copy{animation:none!important;opacity:1!important;transform:none!important}
.tc-home-hero h1,.tc-hero-intro{text-shadow:0 2px 24px rgba(10,10,9,.55)}
.tc-hero-shade{background:linear-gradient(90deg,#171715 0%,#171715f2 24%,#171715c4 42%,#1717154d 66%,#17171500 82%),linear-gradient(0deg,#171715f5 0%,#17171560 28%,transparent 57%,#17171530 100%)!important}
@media(max-width:680px){.tc-hero-shade{background:linear-gradient(to bottom,#17171588 0,#17171508 150px,#17171530 230px,#171715c8 335px,#171715f2 470px,#171715 560px)!important}}
.tcx-hero-in>*{animation:tcx-rise .9s var(--tcx-ease) both}
.tcx-hero-in>*:nth-child(2){animation-delay:.08s}.tcx-hero-in>*:nth-child(3){animation-delay:.16s}.tcx-hero-in>*:nth-child(4){animation-delay:.24s}
@keyframes tcx-rise{from{opacity:.001;transform:translateY(16px);filter:blur(4px)}}
.tcx-word{display:inline-block;background:linear-gradient(92deg,#ffcfae,var(--tcx-accent) 45%,var(--tcx-accent-2));-webkit-background-clip:text;background-clip:text;color:transparent;transition:opacity .35s,transform .35s var(--tcx-ease)}
.tcx-word.swap{opacity:0;transform:translateY(10px)}
.tcx-hero-stats{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:26px;font-size:12px;color:#d1c7bd}
.tcx-hero-stats b{display:block;font-size:24px;color:#faf5ee;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.tc-hero-primary{position:relative;overflow:hidden}
.tc-hero-primary::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,transparent 35%,rgba(255,255,255,.45) 50%,transparent 65%);transform:translateX(-120%);animation:tcx-shine 4.5s 1.5s infinite}
@keyframes tcx-shine{0%,70%{transform:translateX(-120%)}100%{transform:translateX(120%)}}
.tcx-magnet{transition:transform .25s var(--tcx-ease)}

/* Category nav counters */
.category-nav a span{font-variant-numeric:tabular-nums}
.category-nav a{position:relative}
.category-nav a::after{content:"";position:absolute;left:0;right:0;bottom:-15px;height:2px;background:var(--tcx-accent);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--tcx-ease)}
.category-nav a:hover::after,.category-nav a[aria-current=page]::after{transform:scaleX(1)}

/* Watch / video pages */
.tcx-video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px;margin:28px 0 70px}
.tcx-video-card{display:block;border-radius:16px;overflow:hidden;border:1px solid var(--tcx-border);background:var(--ink-raised,#2b2926);color:inherit;text-decoration:none}
.tcx-video-card figure{position:relative;margin:0;aspect-ratio:16/9;overflow:hidden;background:#111}
.tcx-video-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--tcx-ease)}
.tcx-video-card:hover img{transform:scale(1.05)}
.tcx-video-card figure::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.55),transparent 55%)}
.tcx-play{position:absolute;z-index:1;left:50%;top:50%;width:58px;height:58px;margin:-29px 0 0 -29px;border-radius:50%;display:grid;place-items:center;background:rgba(229,142,100,.92);color:#181612;box-shadow:0 0 0 0 rgba(229,142,100,.6);transition:transform .3s var(--tcx-ease)}
.tcx-video-card:hover .tcx-play{transform:scale(1.12);animation:tcx-pulse 1.6s infinite}
@keyframes tcx-pulse{70%{box-shadow:0 0 0 18px rgba(229,142,100,0)}}
.tcx-video-card .tcx-vbody{padding:16px 18px 20px}
.tcx-video-card h2{margin:0 0 6px;font-size:17px;line-height:1.35;letter-spacing:-.02em}
.tcx-video-card p{margin:0;color:var(--tcx-muted);font-size:13px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tcx-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 6px}
.tcx-chips a{padding:7px 14px;border-radius:20px;border:1px solid var(--tcx-border);color:var(--tcx-text);text-decoration:none;font-size:13px}
.tcx-chips a:hover{border-color:var(--tcx-accent)}
.prose span[type=button]{display:inline-block;margin:6px 8px 0 0;padding:2px 8px;border-radius:6px;font:600 12px ui-monospace,monospace;background:rgba(229,142,100,.14);color:var(--tcx-accent-2)}
.prose span[aria-label^="Воспроизвести"] .instruction-figure{position:relative}
.prose span[aria-label^="Воспроизвести"] .instruction-figure::before{content:"▶";position:absolute;z-index:2;left:50%;top:45%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;display:grid;place-items:center;font-size:26px;background:rgba(229,142,100,.92);color:#181612;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.prose div:empty{display:none}

/* Home: latest AI news */
.home-news{margin:34px 0 0}
.home-news-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;margin-top:14px}
.home-news-list a{display:grid;gap:8px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--ink-raised);text-decoration:none;color:var(--paper);transition:border-color .2s,transform .2s}
.home-news-list a:hover{border-color:rgba(229,142,100,.5);transform:translateY(-3px);color:var(--paper)}
.home-news-list strong{font-size:14.5px;line-height:1.4}.home-news-list small{color:var(--paper-muted);font-size:12px}
.home-news .section-heading a{font-size:13px}
@media (prefers-reduced-motion:reduce){.tcx-aurora,.tc-hero-primary::after{animation:none}.tcx-ready .tcx-reveal{opacity:1;transform:none;transition:none}.tcx-hero-in>*{animation:none}.tcx-spot.tcx-tilt{transform:none}}
@media print{.tcx-progress,.tcx-aurora,.tcx-top,.tcx-readpill,.tcx-toasts{display:none!important}}