/* learn-cards.css — shared styles for the card-based learning modules
   (ChatGPT Mastery, Prompt Engineering, Claude…). Cards page + lesson page. */
:root{--ink:#0b0e12;--bg:#0d1014;--card:#141a21;--card2:#11161d;--line:#262d36;--lime:#9BCB1E;--lime2:#C7F03D;--off:#F2F4F6;--mut:#8b94a3;--gpt:#10a37f;--accent:#10a37f}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,system-ui,Arial,sans-serif;background:var(--ink);color:var(--off);line-height:1.6;background-image:radial-gradient(1100px 520px at 80% -160px,rgba(16,163,127,.08),transparent 60%);background-attachment:fixed}
a{color:var(--lime2);text-decoration:none}
.wrap{max-width:1000px;margin:0 auto;padding:0 22px}
.wrap.narrow{max-width:720px}
header.nav{position:sticky;top:0;z-index:40;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:rgba(11,14,18,.75);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px;max-width:1000px;margin:0 auto;padding:0 22px}
.brand{font-family:'Anton';letter-spacing:.5px;text-transform:uppercase;font-size:20px;color:#fff}.brand b{color:var(--lime)}
.nav-in a.home{color:var(--mut);font-size:14px}
.hero{padding:48px 0 6px}
.eyebrow{display:inline-block;color:var(--lime);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:12px;border:1px solid rgba(155,203,30,.4);padding:6px 12px;border-radius:999px;margin-bottom:16px}
h1{font-family:'Anton';font-weight:400;text-transform:uppercase;font-size:clamp(34px,6vw,56px);line-height:1.02;letter-spacing:.5px}
h1 span{color:var(--lime)}
.sub{color:var(--mut);max-width:660px;margin:16px 0 6px;font-size:17px}
.lvlhead{display:flex;align-items:center;gap:12px;margin:34px 0 2px}
.lvlhead h2{font-family:'Anton';font-weight:400;text-transform:uppercase;letter-spacing:.5px;font-size:24px}
.lvlhead .pill{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--lime);border:1px solid rgba(155,203,30,.4);border-radius:999px;padding:3px 10px}
.lvlhead .ln{flex:1;height:1px;background:var(--line)}
.fgrid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;padding:12px 0 4px}
@media(max-width:860px){.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.fgrid{grid-template-columns:1fr}}
.ccard{background:linear-gradient(160deg,var(--card),var(--card2));border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column}
.cfx{height:130px;position:relative;overflow:hidden;background:radial-gradient(150px 100px at 50% 38%,rgba(16,163,127,.10),transparent),#0d1117;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.cb{padding:14px 16px 16px;display:flex;flex-direction:column;flex:1}.cb h4{margin:3px 0 4px;font-size:16px}.cb p{margin:0;color:var(--mut);font-size:13.5px;line-height:1.5;flex:1}
.step{color:var(--lime);font-weight:700;font-size:11px;letter-spacing:.5px}
.prompt{margin-top:12px;background:#0d1117;border:1px solid var(--line);border-radius:10px;padding:10px 11px;position:relative}
.prompt code{display:block;color:#cfd6df;font-size:12.5px;line-height:1.5;font-family:ui-monospace,Menlo,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;padding-right:58px}
.cpy{position:absolute;top:8px;right:8px;background:var(--card2);border:1px solid var(--line);color:var(--off);border-radius:7px;padding:5px 9px;font-size:11px;font-weight:600;cursor:pointer}
.cpy:hover{border-color:rgba(155,203,30,.5)}
.more{display:inline-block;margin-top:12px;color:var(--lime2);font-weight:700;font-size:13px}
footer{border-top:1px solid var(--line);margin-top:30px;padding:26px 0;color:#3c444f}
footer a{color:var(--mut);margin-right:14px;font-size:14px}
/* ---- lesson page ---- */
.lfx{height:150px;border-radius:16px;position:relative;overflow:hidden;background:radial-gradient(180px 120px at 50% 42%,rgba(16,163,127,.12),transparent),#0d1117;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;margin:34px 0 22px}
.num{color:var(--gpt);font-weight:700;letter-spacing:1px;text-transform:uppercase;font-size:12px}
.lh1{font-family:'Anton';font-weight:400;text-transform:uppercase;letter-spacing:.5px;font-size:clamp(28px,5vw,44px);line-height:1.05;margin:10px 0 6px}
.tagline{color:var(--mut);font-size:17px;margin-bottom:20px}
.lbody h3{font-size:18px;margin:22px 0 6px;color:#fff}.lbody p{color:#cfd6df;margin:8px 0}
.plabel{margin:22px 0 8px;color:var(--off);font-weight:700;font-size:14px}
.tip{background:linear-gradient(135deg,#0c1f18,var(--card));border:1px solid #1d4a3b;border-radius:14px;padding:16px 18px;margin:22px 0}
.tip .lbl{color:#34d3a6;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:6px}.tip p{color:#d7f0e8;margin:0;font-weight:600}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 8px}
.btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,var(--lime2),var(--lime));color:#0c1005;font-weight:700;border-radius:10px;padding:12px 18px;font-size:15px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--off)}.btn.gpt{background:var(--gpt);color:#fff}
.nav2{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:28px;padding:18px 0 0}
.nav2 a{color:var(--off);font-size:14px;max-width:46%}.nav2 a span{color:var(--mut);display:block;font-size:12px}
/* ---- animated brand logo badge ---- */
.brandlogo{display:inline-flex;width:50px;height:50px;border-radius:14px;align-items:center;justify-content:center;margin-bottom:12px;animation:logoPulse 2.8s ease-in-out infinite}
.brandlogo svg{animation:spin 16s linear infinite}
.brandlogo.gpt{background:#10a37f;--lg:rgba(16,163,127,.65)}
.brandlogo.claude{background:#d97757;--lg:rgba(217,119,87,.65)}
.brandlogo.gemini{background:linear-gradient(135deg,#4285f4,#9b72cb,#d96570);--lg:rgba(123,135,255,.6)}
.brandlogo.image{background:linear-gradient(135deg,#c061f7,#7d3bd6);--lg:rgba(192,97,247,.6)}
.brandlogo.video{background:linear-gradient(135deg,#ff5d3b,#c0392b);--lg:rgba(255,93,59,.6)}
.brandlogo.audio{background:linear-gradient(135deg,#1fb6a6,#0e8f8f);--lg:rgba(31,182,166,.6)}
.brandlogo.atfy{background:linear-gradient(180deg,var(--lime2),var(--lime));--lg:rgba(155,203,30,.6);font-family:'Anton';color:#0c1005;font-size:21px;letter-spacing:.5px}
.brandlogo.atfy svg{animation:spin 18s linear infinite}
@keyframes logoPulse{0%,100%{box-shadow:0 0 0 rgba(0,0,0,0);transform:scale(1)}50%{box-shadow:0 0 22px var(--lg);transform:scale(1.06)}}
/* ---- motion graphics ---- */
@keyframes spin{to{transform:rotate(360deg)}}
.cgpt{width:230px;background:#0e1117;border:1px solid #20262f;border-radius:12px;overflow:hidden;font-size:10.5px;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.cgpt .bar{display:flex;align-items:center;gap:6px;padding:6px 9px;border-bottom:1px solid #20262f;color:var(--mut);font-weight:600}
.cgpt .bar .gd{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 6px var(--accent)}
.cgpt .cbody{padding:9px;display:flex;flex-direction:column;gap:6px;min-height:50px}
.cgpt .u{align-self:flex-end;background:#2a2f3a;color:#fff;border-radius:9px 9px 2px 9px;padding:5px 8px;max-width:84%}
.cgpt .a{align-self:flex-start;background:#161b22;border:1px solid #20262f;border-radius:9px 9px 9px 2px;padding:7px 9px;display:flex;gap:4px}
.cgpt .a i{width:5px;height:5px;border-radius:50%;background:var(--mut);animation:dot 1.3s infinite}
.cgpt .a i:nth-child(2){animation-delay:.2s}.cgpt .a i:nth-child(3){animation-delay:.4s}
@keyframes dot{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
.cgpt .box{display:flex;align-items:center;gap:6px;margin:0 9px 9px;background:#161b22;border:1px solid #20262f;border-radius:9px;padding:5px 8px;color:#5c6470}
.cgpt .box .snd{margin-left:auto;width:17px;height:17px;border-radius:5px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:11px;animation:pulseS 1.8s ease-in-out infinite}
@keyframes pulseS{0%,100%{box-shadow:0 0 0 rgba(16,163,127,0)}50%{box-shadow:0 0 12px rgba(16,163,127,.7)}}
.tools{display:flex;gap:10px;font-size:24px}.tools span{opacity:.4;animation:toolUp 3.2s ease-in-out infinite}
.tools span:nth-child(2){animation-delay:.4s}.tools span:nth-child(3){animation-delay:.8s}.tools span:nth-child(4){animation-delay:1.2s}
@keyframes toolUp{0%,100%{opacity:.4;transform:translateY(0)}40%{opacity:1;transform:translateY(-7px)}}
.formula{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;max-width:210px}
.formula span{font-size:11px;font-weight:700;border-radius:7px;padding:5px 9px;border:1px solid rgba(155,203,30,.4);color:var(--lime2);background:rgba(155,203,30,.1);opacity:.35;animation:chip 3.2s infinite}
.formula span:nth-child(2){animation-delay:.4s}.formula span:nth-child(3){animation-delay:.8s}.formula span:nth-child(4){animation-delay:1.2s}.formula span:nth-child(5){animation-delay:1.6s}
@keyframes chip{0%,100%{opacity:.35}30%,60%{opacity:1}}
.gptb{display:flex;align-items:center;gap:10px}.gptb .b{width:46px;height:46px;border-radius:13px;background:linear-gradient(180deg,var(--accent),#0c7a5e);display:flex;align-items:center;justify-content:center;font-family:'Anton';font-size:20px;color:#fff;animation:badge 2.6s ease-in-out infinite}
@keyframes badge{0%,100%{transform:scale(1) rotate(0)}50%{transform:scale(1.08) rotate(-4deg)}}
.gptb .ln{display:flex;flex-direction:column;gap:5px}.gptb .ln i{display:block;width:42px;height:5px;border-radius:3px;background:#2a3340;position:relative;overflow:hidden}
.gptb .ln i::after{content:"";position:absolute;inset:0;background:var(--accent);transform:scaleX(0);transform-origin:left;animation:fill 2.6s infinite}
.gptb .ln i:nth-child(2)::after{animation-delay:.7s}.gptb .ln i:nth-child(3)::after{animation-delay:1.4s}
@keyframes fill{0%{transform:scaleX(0)}40%,100%{transform:scaleX(1)}}
.feed{display:flex;align-items:center;gap:10px}.feed .doc{width:24px;height:30px;border-radius:4px;background:#1b2129;border:1px solid var(--line);animation:feedMove 2.4s ease-in-out infinite}
@keyframes feedMove{0%,100%{transform:translateX(0);opacity:1}50%{transform:translateX(9px);opacity:.5}}
.regen{width:42px;height:42px;border-radius:50%;border:3px solid #20262f;border-top-color:var(--accent);animation:spin 1.6s linear infinite}
/* before/after (prompt engineering) */
.ba{display:flex;align-items:center;gap:8px}
.ba .bad,.ba .good{font-size:11px;font-weight:700;border-radius:8px;padding:6px 9px;max-width:84px;line-height:1.3}
.ba .bad{background:#2a1620;border:1px solid #5a2535;color:#ff9aa8}
.ba .good{background:#13301a;border:1px solid #2f7d4f;color:#aef0c4;animation:lit 2.4s ease-in-out infinite}
.ba .ar{color:var(--mut);font-size:18px;animation:nudge 1.6s ease-in-out infinite}
@keyframes nudge{0%,100%{transform:translateX(0)}50%{transform:translateX(4px)}}
@keyframes lit{0%,100%{box-shadow:0 0 0 rgba(155,203,30,0)}50%{box-shadow:0 0 14px rgba(155,203,30,.4)}}
/* examples stack (few-shot) */
.exs{display:flex;flex-direction:column;gap:5px}
.exs i{display:block;width:120px;height:13px;border-radius:4px;background:#1b2129;border:1px solid var(--line);opacity:0;animation:exFade 3s infinite}
.exs i:nth-child(2){animation-delay:.5s}.exs i:nth-child(3){width:90px;background:rgba(155,203,30,.18);border-color:rgba(155,203,30,.4);animation-delay:1s}
@keyframes exFade{0%{opacity:0;transform:translateX(-6px)}15%{opacity:1;transform:none}90%{opacity:1}100%{opacity:.2}}
/* persona faces */
.persona{display:flex;gap:10px;font-size:26px}.persona span{opacity:.4;animation:toolUp 3s ease-in-out infinite}
.persona span:nth-child(2){animation-delay:.5s}.persona span:nth-child(3){animation-delay:1s}