/* ==========================================================================
   Fallbuch Privatrecht: screen layer on top of neon-brass.css
   Dark only. Same tokens in every theme branch.
   ========================================================================== */
:root, :root[data-theme="light"], :root[data-theme="dark"]{
  --bg:#121215; --bg2:#1a1a1f; --bg3:#0a0a0c; --line:#2c2c33; --ink:#d9dde0; --mute:#8d949a; --steel:#adb3b7;
  --or:#ff6200; --or2:#ff7a2e; --cy:#19f0ff; --mg:#ff2a6d; --led:#ff2b2b; --ye:#ffd400; --bl:#2f6bff; --gr:#39ff88;
  color-scheme:dark;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){ --bg:#121215; --ink:#d9dde0; } }
@media (prefers-color-scheme: light){ :root:not([data-theme="dark"]){ --bg:#121215; --ink:#d9dde0; } }
html{ scroll-behavior:smooth; }
html,body{ background:#121215; }
body{ font-size:16px; line-height:1.6; min-height:100vh; display:flex; flex-direction:column;
  background:repeating-linear-gradient(0deg, rgba(25,240,255,.022) 0 1px, transparent 1px 40px),
             repeating-linear-gradient(90deg, rgba(25,240,255,.022) 0 1px, transparent 1px 40px), #121215; }
main{ flex:1; width:100%; max-width:1200px; margin:0 auto; padding:28px 16px 56px; outline:none; }
img,video{ max-width:100%; }
button{ font:inherit; }
.skip{ position:absolute; left:-999px; top:8px; background:var(--or); color:#0a0a0c; padding:6px 10px; z-index:99; }
.skip:focus{ left:8px; }
:focus-visible{ outline:2px solid var(--cy); outline-offset:2px; }

/* ---------- header ---------- */
.nav-top{ position:sticky; top:0; z-index:50; display:flex; align-items:center; gap:18px; padding:0 16px 0 0; height:64px; background:#17171a; border-bottom:1px solid #26262c; }
.brand{ display:flex; align-items:center; gap:12px; border:0; color:inherit; height:100%; }
.brand-logo{ width:64px; height:72px; background:var(--or); display:flex; align-items:center; justify-content:center; align-self:flex-start; }
.brand-logo svg{ width:40px; height:40px; }
.brand-txt{ display:flex; flex-direction:column; line-height:1.1; }
.brand-txt b{ font-family:'Chakra Petch'; font-size:18px; letter-spacing:.06em; color:var(--or); }
.brand-txt small{ font-family:'JetBrains Mono'; font-size:10px; letter-spacing:.14em; color:var(--mute); }
.nav-links{ margin-left:auto; display:flex; gap:2px; }
.nav-links a{ border:0; color:var(--steel); font-family:'Chakra Petch'; font-weight:600; text-transform:uppercase; letter-spacing:.06em; font-size:14px; padding:8px 12px; }
.nav-links a:hover{ color:#fff; }
.nav-links a.on{ color:#0a0a0c; background:var(--or); }
.nav-toggle{ display:none; margin-left:auto; background:none; border:1px solid var(--line); color:var(--or); font-size:20px; width:42px; height:38px; cursor:pointer; }
.ticker-bar{ display:flex; align-items:center; height:34px; border-bottom:1px dashed var(--or); font-family:'Chakra Petch'; font-weight:600; color:var(--steel); letter-spacing:.1em; font-size:13px; overflow:hidden; white-space:nowrap; }
.ticker-bar i{ color:var(--or); font-style:normal; font-size:11px; }
.tk-track{ display:flex; width:max-content; animation:tick 80s linear infinite; will-change:transform; }
.tk-half{ display:flex; align-items:center; }
.tk-half span{ padding:0 26px; } .tk-half i{ padding:0 2px; }
.ticker-bar:hover .tk-track{ animation-play-state:paused; }
@keyframes tick{ from{ transform:translateX(0); } to{ transform:translateX(-50%); } }
@media (max-width:900px){
  .nav-toggle{ display:block; }
  .nav-links{ display:none; position:absolute; top:64px; left:0; right:0; flex-direction:column; background:#17171a; border-bottom:1px solid var(--or); padding:8px; }
  .nav-links.open{ display:flex; }
}
@media (max-width:520px){ .brand-txt small{ display:none; } .brand-txt b{ font-size:15px; } }

.foot-bar{ border-top:1px dashed var(--or); padding:14px 16px; display:flex; flex-wrap:wrap; gap:8px 24px; justify-content:space-between; font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.08em; color:#6b7076; }
.foot-bar b{ color:var(--or); }
.foot-bar a{ color:var(--mute); }

/* ---------- typography for screen (book components use pt) ---------- */
.lbl{ font-size:11px; }
h1.page-h{ font-family:'Chakra Petch'; font-size:clamp(30px,5vw,48px); color:#fff; text-transform:uppercase; margin:6px 0 4px; line-height:1.05; }
.page-k{ font-family:'JetBrains Mono'; font-size:12px; letter-spacing:.16em; text-transform:uppercase; color:var(--or); }
.page-sub{ color:var(--steel); margin:0 0 22px; max-width:760px; }
.rule-d{ border:0; border-top:1px dashed var(--or); margin:18px 0; }
h3{ font-size:20px; margin:28px 0 12px; } h3 .n{ font-size:12px; padding:2px 7px; }
h4{ font-size:15px; margin:22px 0 10px; }
table{ font-size:14px; } th{ font-size:11px; padding:7px 9px; } td{ padding:8px 9px; } td.k{ font-size:12px; white-space:normal; }
.box{ margin:22px 0; padding:16px 18px 10px; } .box>.tag{ font-size:11px; top:-9px; left:14px; padding:0 7px; }
.box p, .box li{ font-size:15px; }
.fig{ padding:14px; margin:20px 0; overflow-x:auto; }
.fig .cap{ font-size:11px; margin-top:8px; }
.fx{ padding:14px 18px; margin:20px 0; } .fx .eq{ font-size:15px; overflow-wrap:anywhere; } .fx small{ font-size:12px; }
.ex{ margin:20px 0; } .ex p, .ex li{ font-size:15px; } .ex .calc{ font-size:14px; margin-left:10px; overflow-wrap:anywhere; }
.hatch{ padding:16px 20px; }
.card{ padding:14px 16px; } .card h5{ font-size:15px; margin-bottom:6px; } .card ul{ font-size:14px; padding-left:18px; }
.card .pro, .card .con{ font-size:11px; }
.mini{ font-size:14px; } .lead{ font-size:17px; }
.chip{ font-size:11px; padding:2px 8px; }
.case-title{ margin:4px 0 18px; gap:16px; flex-wrap:wrap; }
.case-id{ font-size:28px; padding:10px 14px; min-width:96px; } .case-id small{ font-size:9px; }
.case-title h2{ font-size:clamp(22px,3.4vw,30px); } .case-title h2 span{ font-size:11px; margin-top:6px; }
.pts{ font-size:38px; } .pts small{ font-size:9px; }
.steps>li::before{ font-size:11px; padding:1px 5px; }
.steps>li{ padding-left:40px; }
ul.sq>li{ padding-left:20px; } ul.sq>li::before{ width:7px; height:7px; top:.6em; }
.three, .two{ gap:14px; }
.rt{ font-size:13px; letter-spacing:1px; }
table.heat{ min-width:560px; }
.tbl-wrap{ overflow-x:auto; }
@media (max-width:700px){ .twocol{ column-count:1; } .fig svg{ min-width:560px; } .pts{ display:none; } }

/* ---------- buttons, panels ---------- */
.btn{ display:inline-flex; align-items:center; gap:8px; cursor:pointer; border:1px solid var(--or); background:transparent; color:var(--or); font-family:'Chakra Petch'; font-weight:700; text-transform:uppercase; letter-spacing:.06em; font-size:14px; padding:9px 16px; transition:background .15s, color .15s, box-shadow .15s; text-decoration:none; }
.btn:hover{ background:var(--or); color:#0a0a0c; box-shadow:0 0 16px rgba(255,98,0,.35); }
.btn.solid{ background:var(--or); color:#0a0a0c; }
.btn.cy{ border-color:var(--cy); color:var(--cy); } .btn.cy:hover{ background:var(--cy); color:#0a0a0c; box-shadow:0 0 16px rgba(25,240,255,.35); }
.btn.gr{ border-color:var(--gr); color:var(--gr); } .btn.gr:hover{ background:var(--gr); color:#0a0a0c; }
.btn.red{ border-color:var(--led); color:var(--led); } .btn.red:hover{ background:var(--led); color:#0a0a0c; }
.btn.ghost{ border-color:var(--line); color:var(--steel); } .btn.ghost:hover{ background:#26262c; color:#fff; box-shadow:none; }
.btn[disabled]{ opacity:.4; pointer-events:none; }
.btn-row{ display:flex; flex-wrap:wrap; gap:10px; margin:14px 0; }
.panel{ position:relative; background:var(--bg2); border:1px solid var(--line); padding:20px; }
.panel.brk::before,.panel.brk::after,.panel .c3,.panel .c4{ border-color:var(--steel); }
.grid{ display:grid; gap:16px; }
.g2{ grid-template-columns:repeat(2,minmax(0,1fr)); } .g3{ grid-template-columns:repeat(3,minmax(0,1fr)); } .g4{ grid-template-columns:repeat(4,minmax(0,1fr)); }
@media (max-width:900px){ .g3,.g4{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (max-width:600px){ .g2,.g3,.g4{ grid-template-columns:1fr; } }
.seg{ display:inline-flex; border:1px solid var(--line); }
.seg button{ background:transparent; border:0; color:var(--steel); padding:8px 14px; cursor:pointer; font-family:'JetBrains Mono'; font-size:12px; letter-spacing:.1em; text-transform:uppercase; }
.seg button.on{ background:var(--cy); color:#0a0a0c; font-weight:700; }
.muted{ color:var(--mute); }
.mono{ font-family:'JetBrains Mono'; }
.led-num{ font-family:'VT323'; color:var(--led); text-shadow:0 0 10px rgba(255,43,43,.6); line-height:1; }
.bar{ height:8px; background:#26262c; position:relative; overflow:hidden; }
.bar>i{ position:absolute; left:0; top:0; bottom:0; background:var(--cy); box-shadow:0 0 10px rgba(25,240,255,.5); transition:width .4s ease; }
.bar.or>i{ background:var(--or); box-shadow:0 0 10px rgba(255,98,0,.5); }
.input, select.input{ background:#0a0a0c; border:1px solid var(--line); color:#fff; padding:9px 12px; font-family:'JetBrains Mono'; font-size:15px; width:100%; }
.input:focus{ border-color:var(--cy); outline:none; }
/* range sliders: tall hit area, 8px track with orange fill, 24px thumb */
.sl{ margin:14px 0 4px; }
.sl-head{ display:flex; justify-content:space-between; align-items:baseline; gap:10px; margin-bottom:4px; }
.sl-head label{ font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--steel); }
.sl-val{ font-family:'VT323',monospace; font-size:24px; line-height:1; white-space:nowrap; text-shadow:0 0 8px rgba(25,240,255,.45); }
.sl-val small{ font-family:'JetBrains Mono'; font-size:11px; color:var(--mute); text-shadow:none; }
.sl-row{ display:grid; grid-template-columns:28px minmax(0,1fr); gap:8px; align-items:end; }
.sl-row .sl-use{ width:20px; height:20px; margin:0 0 12px; accent-color:var(--or); cursor:pointer; }
.sl-row .sl{ margin-top:10px; }
input[type=range]{ -webkit-appearance:none; appearance:none; display:block; width:100%; height:34px; margin:0; background:transparent; cursor:pointer; --p:50%; }
input[type=range]:focus{ outline:none; }
input[type=range]::-webkit-slider-runnable-track{ height:8px; border:1px solid #3a3a42; background:linear-gradient(90deg, var(--or) 0 var(--p), #0a0a0c var(--p) 100%); box-shadow:inset 0 0 0 1px rgba(0,0,0,.4); }
input[type=range]::-moz-range-track{ height:8px; border:1px solid #3a3a42; background:#0a0a0c; }
input[type=range]::-moz-range-progress{ height:8px; background:var(--or); }
input[type=range]::-webkit-slider-thumb{ -webkit-appearance:none; appearance:none; width:24px; height:24px; margin-top:-9px; border-radius:50%; background:#18181c; border:3px solid var(--or); box-shadow:0 0 0 3px rgba(255,98,0,.18), 0 0 14px rgba(255,98,0,.55); transition:transform .15s; }
input[type=range]::-moz-range-thumb{ width:18px; height:18px; border-radius:50%; background:#18181c; border:3px solid var(--or); box-shadow:0 0 0 3px rgba(255,98,0,.18), 0 0 14px rgba(255,98,0,.55); }
input[type=range]:hover::-webkit-slider-thumb, input[type=range]:active::-webkit-slider-thumb{ transform:scale(1.15); }
input[type=range]:focus-visible::-webkit-slider-thumb{ border-color:var(--cy); box-shadow:0 0 0 3px rgba(25,240,255,.3), 0 0 14px rgba(25,240,255,.6); }
input[type=range]:focus-visible::-moz-range-thumb{ border-color:var(--cy); }
input[type=range]:disabled{ cursor:not-allowed; opacity:.35; }
input[type=range]:disabled::-webkit-slider-thumb{ box-shadow:none; border-color:var(--mute); }
label.f{ display:block; font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--mute); margin:12px 0 5px; }
.fade-in{ animation:fadeIn .35s ease both; }
@keyframes fadeIn{ from{ opacity:0; transform:translateY(8px);} to{ opacity:1; transform:none; } }
@media (prefers-reduced-motion: reduce){ *{ animation-duration:.01ms !important; transition-duration:.01ms !important; } .tk-track{ animation:none !important; } }

/* ---------- start / hero ---------- */
.hero{ position:relative; overflow:hidden; background:#0a0a0c; border:1px solid #24242a; min-height:330px; display:grid; grid-template-columns:1.1fr 1fr; }
.hero-txt{ position:relative; z-index:2; padding:34px 30px; }
.hero-art{ position:relative; min-height:260px; }
.hero-art svg{ position:absolute; inset:0; width:100%; height:100%; }
.hero .scan{ position:absolute; inset:0; background:repeating-linear-gradient(0deg, rgba(0,0,0,.25) 0 1px, transparent 1px 3px); pointer-events:none; z-index:3; }
.glitch-h{ position:relative; font-family:'Chakra Petch'; font-weight:700; font-size:clamp(36px,6vw,64px); line-height:1; text-transform:uppercase; height:1.05em; margin:12px 0 6px; }
.glitch-h span{ position:absolute; left:0; top:0; white-space:nowrap; }
.glitch-h .g1{ color:var(--cy); opacity:.75; transform:translate(3px,1px); }
.glitch-h .g2{ color:var(--mg); opacity:.75; transform:translate(-3px,-1px); }
.glitch-h .g3{ color:#f2f4f5; }
.glitch-h:hover .g1{ animation:gl 0.4s steps(2) infinite; } .glitch-h:hover .g2{ animation:gl 0.4s steps(2) infinite reverse; }
@keyframes gl{ 0%{ transform:translate(3px,1px);} 50%{ transform:translate(-4px,2px);} 100%{ transform:translate(2px,-2px);} }
.hero-sub{ font-family:'Chakra Petch'; font-weight:700; font-size:clamp(18px,2.6vw,26px); color:var(--or); text-transform:uppercase; }
@media (max-width:800px){ .hero{ grid-template-columns:1fr; } .hero-art{ min-height:200px; } }
.countdown{ display:flex; align-items:center; justify-content:space-between; gap:12px; background:#050506; border:1px solid #26262c; padding:14px 20px; margin-top:16px; flex-wrap:wrap; }
.countdown .led-num{ font-size:clamp(34px,6vw,52px); }
.countdown .t{ font-family:'JetBrains Mono'; color:var(--led); font-size:12px; letter-spacing:.12em; text-transform:uppercase; line-height:1.7; text-shadow:0 0 6px rgba(255,43,43,.4); }
.stat{ background:var(--bg2); border:1px solid var(--line); padding:16px; }
.stat .led-num{ font-size:44px; }
.stat .lbl{ display:block; margin-bottom:6px; }
.tile{ display:block; border:1px solid var(--line); background:var(--bg2); padding:18px; color:inherit; transition:border-color .2s, transform .2s, box-shadow .2s; position:relative; }
.tile:hover{ border-color:var(--or); transform:translateY(-3px); box-shadow:0 8px 24px rgba(0,0,0,.4), 0 0 18px rgba(255,98,0,.15); }
.tile h3{ margin:8px 0 6px; font-size:19px; }
.tile p{ font-size:14px; color:var(--steel); margin:0; }
.tile .ic{ font-family:'JetBrains Mono'; font-size:11px; color:var(--or); letter-spacing:.14em; }
.timeline{ border-left:2px dashed var(--or); margin-left:8px; padding-left:20px; }
.tl-item{ position:relative; margin-bottom:16px; }
.tl-item::before{ content:""; position:absolute; left:-27px; top:6px; width:12px; height:12px; background:#121215; border:2px solid var(--or); }
.tl-item.done::before{ background:var(--or); }
.tl-item.next::before{ background:var(--cy); border-color:var(--cy); box-shadow:0 0 10px var(--cy); }
.tl-item.exam::before{ background:var(--led); border-color:var(--led); box-shadow:0 0 10px var(--led); }
.tl-item .d{ font-family:'JetBrains Mono'; font-size:12px; letter-spacing:.1em; color:var(--or); }
.tl-item.next .d{ color:var(--cy); } .tl-item.exam .d{ color:var(--led); }
.tl-item .x{ font-size:15px; } .tl-item .c{ font-size:13px; color:var(--mute); }
.tl-item a{ font-family:'JetBrains Mono'; font-size:12px; }

/* ---------- learn ---------- */
.learn{ display:grid; grid-template-columns:280px minmax(0,1fr); gap:28px; align-items:start; }
.side{ position:sticky; top:84px; max-height:calc(100vh - 100px); overflow:auto; border:1px solid var(--line); background:var(--bg2); padding:12px; }
.side .grp{ font-family:'Chakra Petch'; font-weight:700; text-transform:uppercase; color:var(--or); font-size:13px; letter-spacing:.05em; border-bottom:1px dashed var(--or); padding:10px 4px 4px; margin-bottom:4px; display:flex; justify-content:space-between; }
.side a{ display:flex; gap:8px; align-items:baseline; border:0; color:var(--steel); font-size:13.5px; padding:5px 6px; line-height:1.3; }
.side a .id{ font-family:'JetBrains Mono'; font-size:11px; color:var(--cy); min-width:36px; }
.side a:hover{ background:#202027; color:#fff; }
.side a.on{ background:rgba(255,98,0,.12); color:#fff; box-shadow:inset 3px 0 0 var(--or); }
.side a .ok{ margin-left:auto; color:var(--gr); font-size:12px; }
.side-toggle{ display:none; }
@media (max-width:900px){ .learn{ grid-template-columns:1fr; } .side{ position:static; max-height:none; display:none; } .side.open{ display:block; } .side-toggle{ display:inline-flex; } }
.case-top{ padding:6px 0; margin-bottom:14px; flex-wrap:wrap; gap:6px; }
.learn-tools{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between; margin-bottom:14px; }
.kompakt-list{ list-style:none; padding:0; margin:0; }
.kompakt-list li{ position:relative; padding:12px 14px 12px 44px; margin-bottom:10px; background:var(--bg2); border:1px solid var(--line); font-size:16px; animation:fadeIn .3s ease both; }
.kompakt-list li::before{ content:attr(data-n); position:absolute; left:10px; top:12px; font-family:'JetBrains Mono'; font-size:11px; font-weight:700; color:#0a0a0c; background:var(--cy); padding:1px 5px; }
.checkup{ margin-top:34px; border-top:1px dashed var(--or); padding-top:10px; }
.pn{ display:flex; justify-content:space-between; gap:10px; margin-top:30px; flex-wrap:wrap; }
.pn a{ max-width:48%; }
.related{ display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.chap-grid .tile{ padding:14px 16px; }
.chap-grid .tile .id{ font-family:'JetBrains Mono'; color:var(--cy); font-size:12px; }

/* ---------- quiz ---------- */
.q-card{ background:var(--bg2); border:1px solid var(--line); padding:22px; animation:fadeIn .3s ease both; }
.q-meta{ display:flex; justify-content:space-between; gap:10px; font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.12em; color:var(--mute); text-transform:uppercase; margin-bottom:10px; flex-wrap:wrap; }
.q-text{ font-size:18px; color:#fff; font-weight:500; margin-bottom:16px; }
.opt{ display:flex; gap:12px; align-items:flex-start; width:100%; text-align:left; background:#121215; border:1px solid var(--line); color:var(--ink); padding:12px 14px; margin-bottom:8px; cursor:pointer; font-size:15px; transition:border-color .15s, background .15s; }
.opt:hover{ border-color:var(--steel); }
.opt .k{ font-family:'JetBrains Mono'; font-size:12px; color:var(--or); min-width:20px; padding-top:2px; }
.opt.sel{ border-color:var(--cy); background:rgba(25,240,255,.06); }
.opt.right{ border-color:var(--gr); background:rgba(57,255,136,.08); }
.opt.wrong{ border-color:var(--led); background:rgba(255,43,43,.08); }
.opt[disabled]{ cursor:default; }
.fb{ margin-top:14px; padding:12px 14px; border-left:4px solid var(--gr); background:#0f1a13; font-size:15px; animation:fadeIn .25s ease both; }
.fb.bad{ border-color:var(--led); background:#1c1012; }
.fb b.h{ font-family:'JetBrains Mono'; font-size:12px; letter-spacing:.12em; display:block; margin-bottom:4px; }
.q-top{ display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:14px; flex-wrap:wrap; }
.timer{ font-size:40px; }
.timer.warn{ animation:blink 1s steps(2) infinite; }
@keyframes blink{ 50%{ opacity:.35; } }
.grade{ text-align:center; padding:26px; }
.grade .led-num{ font-size:clamp(64px,12vw,110px); }
.review-item{ border-left:3px solid var(--gr); padding:8px 12px; margin:10px 0; background:var(--bg2); font-size:14px; }
.review-item.bad{ border-color:var(--led); }
.chk{ display:flex; gap:8px; align-items:center; font-size:14px; padding:4px 0; cursor:pointer; }
.chk input{ accent-color:var(--or); width:16px; height:16px; }

/* ---------- glossary ---------- */
.az{ display:flex; flex-wrap:wrap; gap:4px; margin:12px 0 18px; }
.az button{ background:var(--bg2); border:1px solid var(--line); color:var(--steel); font-family:'JetBrains Mono'; font-size:13px; width:34px; height:34px; cursor:pointer; }
.az button.on{ background:var(--or); color:#0a0a0c; border-color:var(--or); }
.az button[disabled]{ opacity:.25; cursor:default; }
.g-item{ border:1px solid var(--line); background:var(--bg2); padding:14px 16px; animation:fadeIn .25s ease both; }
.g-item h4{ margin:0 0 6px; font-size:16px; color:#fff; } .g-item h4::before{ content:""; }
.g-item p{ font-size:14.5px; margin:0 0 8px; color:var(--ink); }
.g-item a{ font-family:'JetBrains Mono'; font-size:11px; }
mark{ background:rgba(255,212,0,.25); color:#fff; padding:0 2px; }

/* ---------- flashcards (3D flip + deal animation) ---------- */
.fc-wrap{ max-width:640px; margin:10px auto 0; }
.fc{ position:relative; width:100%; height:330px; cursor:pointer; transform-style:preserve-3d; transition:transform .7s cubic-bezier(.2,.8,.2,1); }
.fc.flip{ transform:rotateY(180deg); }
.fc-face{ position:absolute; inset:0; backface-visibility:hidden; -webkit-backface-visibility:hidden; display:flex; flex-direction:column; justify-content:center; padding:30px 34px; border:1px solid var(--line); background:repeating-linear-gradient(135deg, rgba(173,179,183,.06) 0 2px, transparent 2px 9px), #18181c; }
.fc-face::before,.fc-face::after{ content:""; position:absolute; width:16px; height:16px; border:2px solid var(--or); }
.fc-face::before{ top:-1px; left:-1px; border-right:0; border-bottom:0; } .fc-face::after{ bottom:-1px; right:-1px; border-left:0; border-top:0; }
.fc-front .t{ font-family:'Chakra Petch'; font-weight:700; text-transform:uppercase; font-size:clamp(22px,4vw,32px); color:#fff; line-height:1.15; }
.fc-back{ transform:rotateY(180deg); border-color:var(--cy); box-shadow:0 0 0 1px rgba(25,240,255,.25), 0 0 26px rgba(25,240,255,.15); background:linear-gradient(135deg, rgba(25,240,255,.08), rgba(25,240,255,.01)), #141a1d; }
.fc-back .t{ font-size:clamp(17px,2.6vw,21px); color:#fff; line-height:1.5; }
.fc-face .tag{ position:absolute; top:14px; left:18px; font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.14em; color:var(--or); text-transform:uppercase; }
.fc-back .tag{ color:var(--cy); }
.fc-face .hint{ position:absolute; bottom:14px; right:18px; font-family:'JetBrains Mono'; font-size:11px; letter-spacing:.12em; color:var(--mute); }
.fc-face .src{ position:absolute; bottom:14px; left:18px; font-family:'JetBrains Mono'; font-size:11px; color:var(--cy); }
/* deal/out motion lives on .fc-move so it never fights the flip transform on .fc */
.fc-move{ perspective:1400px; }
.fc-wrap.deal-in .fc-move{ animation:dealIn .55s cubic-bezier(.2,.9,.25,1.2) both; }
.fc-wrap.out-right .fc-move{ animation:outRight .45s ease-in both; }
.fc-wrap.out-left .fc-move{ animation:outLeft .45s ease-in both; }
@keyframes dealIn{ 0%{ opacity:0; transform:translateY(60px) rotate(-6deg) scale(.92); } 100%{ opacity:1; transform:none; } }
@keyframes outRight{ to{ opacity:0; transform:translateX(120%) rotate(14deg); } }
@keyframes outLeft{ to{ opacity:0; transform:translateX(-120%) rotate(-14deg); } }
.stack-shadow{ height:12px; margin:0 26px; background:#16161a; border:1px solid #24242a; border-top:0; }
.stack-shadow.s2{ margin:0 44px; height:9px; background:#141417; }
.boxes{ display:grid; grid-template-columns:repeat(5,1fr); gap:8px; margin:14px 0; }
.boxes div{ border:1px solid var(--line); background:var(--bg2); padding:10px; text-align:center; }
.boxes .led-num{ font-size:30px; display:block; }
.boxes .lbl{ font-size:10px; }
.boxes div.b5 .led-num{ color:var(--gr); text-shadow:0 0 10px rgba(57,255,136,.5); }
.fc-actions{ display:flex; justify-content:center; gap:12px; margin-top:20px; flex-wrap:wrap; }
.kbd{ font-family:'JetBrains Mono'; font-size:11px; color:var(--mute); }

/* ---------- videos ---------- */
.v-card{ display:block; border:1px solid var(--line); background:var(--bg2); color:inherit; transition:border-color .2s, transform .2s; }
.v-card:hover{ border-color:var(--cy); transform:translateY(-3px); }
.v-thumb{ position:relative; aspect-ratio:16/9; background:#0a0a0c; overflow:hidden; }
.v-thumb img{ width:100%; height:100%; object-fit:cover; display:block; }
.v-thumb .play{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; }
.v-thumb .play i{ width:58px; height:58px; border:2px solid var(--cy); display:flex; align-items:center; justify-content:center; background:rgba(10,10,12,.7); color:var(--cy); font-style:normal; font-size:22px; box-shadow:0 0 16px rgba(25,240,255,.35); }
.v-thumb .dur{ position:absolute; right:8px; bottom:8px; font-family:'JetBrains Mono'; font-size:12px; background:#0a0a0c; color:var(--ye); padding:2px 6px; }
.v-body{ padding:12px 14px; } .v-body h3{ margin:4px 0; font-size:17px; } .v-body p{ font-size:13px; color:var(--mute); margin:0; }
.player{ display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:20px; align-items:start; }
@media (max-width:950px){ .player{ grid-template-columns:1fr; } }
.player video{ width:100%; background:#000; border:1px solid #24242a; display:block; }
video::cue{ background:rgba(10,10,12,.85); color:#fff; font-family:'IBM Plex Sans',sans-serif; font-size:20px; }
.chap{ display:flex; gap:10px; width:100%; background:transparent; border:0; border-bottom:1px solid var(--line); color:var(--steel); text-align:left; padding:8px 4px; cursor:pointer; font-size:14px; }
.chap:hover{ color:#fff; } .chap.on{ color:var(--cy); }
.chap .t{ font-family:'JetBrains Mono'; color:var(--or); font-size:12px; min-width:44px; }
.transcript{ max-height:300px; overflow:auto; border:1px solid var(--line); background:#0a0a0c; padding:10px 12px; margin-top:12px; }
.transcript p{ font-size:14px; margin:0 0 6px; cursor:pointer; color:var(--mute); padding:2px 4px; }
.transcript p.on{ color:#fff; background:rgba(25,240,255,.08); box-shadow:inset 3px 0 0 var(--cy); }

/* ---------- lab ---------- */
.lab-nav{ display:flex; flex-wrap:wrap; gap:8px; margin:6px 0 20px; }
.lab-nav button{ background:var(--bg2); border:1px solid var(--line); color:var(--steel); font-family:'Chakra Petch'; font-weight:600; text-transform:uppercase; font-size:13px; letter-spacing:.04em; padding:8px 12px; cursor:pointer; }
.lab-nav button.on{ border-color:var(--or); color:#0a0a0c; background:var(--or); }
.lab-tool{ animation:fadeIn .3s ease both; }
.lab-grid{ display:grid; grid-template-columns:minmax(0,340px) minmax(0,1fr); gap:20px; align-items:start; }
@media (max-width:850px){ .lab-grid{ grid-template-columns:1fr; } }
.out-big{ font-family:'VT323'; color:var(--cy); font-size:46px; line-height:1; text-shadow:0 0 10px rgba(25,240,255,.5); }
.out-row{ display:flex; justify-content:space-between; gap:10px; border-bottom:1px solid var(--line); padding:8px 0; font-size:15px; }
.out-row b{ font-family:'JetBrains Mono'; color:var(--ye); font-weight:400; }
.lab-svg{ width:100%; height:auto; display:block; background:#0a0a0c; border:1px solid #24242a; }
.game-opt{ display:inline-block; margin:4px; }
.scen{ font-size:17px; color:#fff; margin:6px 0 14px; }
.drop-zones{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
@media (max-width:700px){ .drop-zones{ grid-template-columns:1fr; } }
.zone{ border:1px dashed var(--line); min-height:120px; padding:10px; background:var(--bg2); transition:border-color .2s, background .2s; }
.zone h5{ font-family:'Chakra Petch'; margin:0 0 8px; text-transform:uppercase; font-size:15px; }
.zone.over{ border-color:var(--cy); background:rgba(25,240,255,.06); }
.chipd{ display:inline-block; margin:4px; padding:6px 10px; border:1px solid var(--steel); background:#121215; font-size:13.5px; cursor:grab; user-select:none; }
.chipd.sel{ border-color:var(--cy); color:var(--cy); }
.chipd.ok{ border-color:var(--gr); color:var(--gr); } .chipd.no{ border-color:var(--led); color:var(--led); }
.pool{ min-height:60px; border:1px solid var(--line); padding:8px; margin-bottom:14px; background:#0a0a0c; }
.toast{ position:fixed; left:50%; bottom:24px; transform:translateX(-50%); background:#0a0a0c; border:1px solid var(--cy); color:#fff; padding:10px 16px; font-size:14px; z-index:80; animation:fadeIn .25s ease both; box-shadow:0 0 18px rgba(25,240,255,.25); }

#view:focus, #view:focus-visible{ outline:none; }