/* ============================================================
   BitcoinChurchAsia Academy — shared design system
   Self-contained, no framework. Dark, gamified, premium.
   ============================================================ */
:root{
  --btc:#f7931a;--btc2:#ffb347;--gold:#ffd24a;--green:#19d486;--red:#ff5470;
  --purple:#a855f7;--blue:#3b9dff;--pink:#ff4d8d;
  --bg:#0a0a0f;--bg2:#12121b;--bg3:#1a1a26;--bg4:#23232f;
  --border:#2a2a3a;--border2:#34344a;
  --text:#f1f1f8;--muted:#9a9ab0;--dim:#6d6d82;
  --ring:#2a2a3a;--shadow:0 18px 50px -12px rgba(0,0,0,.7);
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--btc);text-decoration:none}
img{max-width:100%}
::selection{background:rgba(247,147,26,.3)}

/* ---- NAV ---- */
nav.bca{background:rgba(12,12,18,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200}
nav.bca .in{max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:1rem;height:58px;padding:0 1.1rem}
nav.bca .logo{font-weight:800;font-size:1.02rem;color:var(--text);display:flex;align-items:center;gap:.45rem}
nav.bca .logo b{color:var(--btc)}
nav.bca .sp{flex:1}
nav.bca .nlink{color:var(--muted);font-size:.86rem;font-weight:600}
nav.bca .nlink:hover{color:var(--text)}
nav.bca .pill{display:inline-flex;align-items:center;gap:.35rem;background:var(--bg3);border:1px solid var(--border2);padding:.4rem .8rem;border-radius:999px;font-size:.8rem;font-weight:700;color:var(--text)}
nav.bca .pill .flame{filter:grayscale(.1)}
@media(max-width:640px){nav.bca .hideSm{display:none}}

/* ---- LAYOUT ---- */
.wrap{max-width:1080px;margin:0 auto;padding:0 1.1rem}
.wrap-narrow{max-width:780px;margin:0 auto;padding:0 1.1rem}
section.blk{padding:2.4rem 0}
.center{text-align:center}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.small{font-size:.85rem}

/* ---- HERO ---- */
.hero{position:relative;overflow:hidden;padding:3.2rem 1.1rem 2.2rem;text-align:center;
  background:radial-gradient(120% 80% at 50% -10%,rgba(247,147,26,.16),transparent 60%),
             radial-gradient(70% 60% at 85% 10%,rgba(168,85,247,.12),transparent 60%),var(--bg)}
.hero .in{max-width:820px;margin:0 auto;position:relative;z-index:2}
.kicker{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--btc);background:rgba(247,147,26,.1);border:1px solid rgba(247,147,26,.3);padding:.32rem .85rem;border-radius:999px;margin-bottom:1.1rem}
h1{font-size:clamp(2rem,6.5vw,3.3rem);font-weight:900;line-height:1.12;letter-spacing:-.02em;margin-bottom:1rem;
  background:linear-gradient(135deg,#fff 25%,var(--btc2) 95%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.sub{color:var(--muted);font-size:1.05rem;max-width:600px;margin:0 auto 1.5rem}
.cta-row{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap}

/* ---- BUTTONS ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;font-weight:700;padding:.8rem 1.5rem;border-radius:999px;font-size:.94rem;border:none;cursor:pointer;font-family:inherit;transition:transform .12s ease,box-shadow .2s ease,background .2s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--btc),#e07d00);color:#1a1200;box-shadow:0 8px 24px -8px rgba(247,147,26,.6)}
.btn-primary:hover{box-shadow:0 12px 30px -8px rgba(247,147,26,.75)}
.btn-ghost{background:var(--bg3);color:var(--text);border:1px solid var(--border2)}
.btn-ghost:hover{border-color:var(--btc)}
.btn-green{background:linear-gradient(135deg,var(--green),#0fa869);color:#04190f}
.btn-sm{padding:.55rem 1rem;font-size:.85rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---- CARDS ---- */
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem}
.grid{display:grid;gap:.9rem}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:780px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.g2,.g3,.g4{grid-template-columns:1fr}}

h2.sec{font-size:1.5rem;font-weight:800;letter-spacing:-.01em;margin-bottom:.3rem}
.sec-sub{color:var(--muted);font-size:.95rem;margin-bottom:1.3rem}

/* ---- STAT DASHBOARD ---- */
.dash{background:linear-gradient(135deg,var(--bg3),var(--bg2));border:1px solid var(--border2);border-radius:22px;padding:1.4rem;box-shadow:var(--shadow)}
.dash-top{display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap}
.lvl-badge{width:66px;height:66px;border-radius:50%;display:grid;place-items:center;font-size:1.8rem;background:radial-gradient(circle at 30% 30%,var(--bg4),var(--bg));border:2px solid var(--btc);box-shadow:0 0 0 4px rgba(247,147,26,.12);flex-shrink:0}
.lvl-meta{flex:1;min-width:160px}
.lvl-name{font-weight:800;font-size:1.15rem}
.lvl-name b{color:var(--btc)}
.xp-line{display:flex;justify-content:space-between;font-size:.78rem;color:var(--muted);margin:.4rem 0 .3rem}
.bar{height:9px;border-radius:999px;background:var(--bg);overflow:hidden;border:1px solid var(--border)}
.bar > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--btc),var(--gold));transition:width .6s cubic-bezier(.2,.8,.2,1)}
.bar.green > i{background:linear-gradient(90deg,var(--green),#7ef0bd)}
.mini-stats{display:flex;gap:.7rem;margin-top:1.1rem;flex-wrap:wrap}
.mini{flex:1;min-width:88px;background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:.7rem .6rem;text-align:center}
.mini .v{font-size:1.35rem;font-weight:900;line-height:1.1}
.mini .l{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-top:.15rem}
.mini.flame .v{color:var(--btc)}
.mini.iq .v{color:var(--blue)}
.mini.badge .v{color:var(--gold)}
.mini.xp .v{color:var(--green)}

/* ---- DAILY QUIZ CARD ---- */
.daily{background:linear-gradient(135deg,rgba(247,147,26,.12),var(--bg2));border:1px solid var(--btc);border-radius:22px;padding:1.4rem;position:relative;overflow:hidden}
.daily::after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;background:radial-gradient(circle,rgba(247,147,26,.25),transparent 70%)}
.daily h3{font-size:1.2rem;font-weight:800;display:flex;align-items:center;gap:.5rem;position:relative}
.daily p{color:var(--muted);font-size:.9rem;margin:.4rem 0 1rem;position:relative}
.daily .row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;position:relative}

/* ---- COURSE CARDS ---- */
.course-card{display:flex;flex-direction:column;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem;transition:border-color .2s,transform .15s;position:relative;overflow:hidden}
.course-card:hover{border-color:var(--btc);transform:translateY(-2px)}
.course-card .ico{font-size:2rem;margin-bottom:.5rem}
.course-card h3{font-size:1.08rem;font-weight:800;margin-bottom:.25rem;color:var(--text)}
.course-card .desc{font-size:.86rem;color:var(--muted);margin-bottom:.9rem;flex:1}
.course-card .meta{display:flex;gap:.7rem;font-size:.74rem;color:var(--dim);margin-bottom:.7rem;flex-wrap:wrap}
.course-card .meta span{display:inline-flex;align-items:center;gap:.25rem}
.course-card .lvltag{position:absolute;top:1rem;right:1rem;font-size:.66rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;color:var(--green);background:rgba(25,212,134,.1);border:1px solid rgba(25,212,134,.3);padding:.2rem .55rem;border-radius:999px}
.course-card .prog-l{display:flex;justify-content:space-between;font-size:.72rem;color:var(--muted);margin-bottom:.3rem}
.course-card .cc-foot{display:flex;align-items:center;justify-content:space-between;margin-top:.9rem;gap:.6rem}
.course-card .cc-cta{font-weight:700;font-size:.86rem;color:var(--btc)}
.tick{color:var(--green);font-weight:800}

/* ---- BADGES ---- */
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(94px,1fr));gap:.7rem}
.bdg{background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:.85rem .5rem;text-align:center;position:relative;transition:transform .15s}
.bdg .e{font-size:1.7rem;filter:grayscale(1) opacity(.4);transition:filter .3s}
.bdg .n{font-size:.7rem;color:var(--muted);margin-top:.3rem;line-height:1.25}
.bdg.on{border-color:var(--gold);background:linear-gradient(160deg,rgba(255,210,74,.1),var(--bg2))}
.bdg.on .e{filter:none}
.bdg.on .n{color:var(--text)}
.bdg.on::after{content:"✓";position:absolute;top:.3rem;right:.4rem;font-size:.6rem;color:var(--gold);font-weight:800}

/* ---- LESSON (course pages) ---- */
.lesson{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:.9rem;overflow:hidden;transition:border-color .2s}
.lesson.done{border-color:rgba(25,212,134,.4)}
.lesson .lh{display:flex;align-items:center;gap:.8rem;padding:1.05rem 1.2rem;cursor:pointer;user-select:none}
.lesson .lnum{width:34px;height:34px;border-radius:50%;background:var(--bg);border:1px solid var(--border2);display:grid;place-items:center;font-weight:800;font-size:.92rem;flex-shrink:0}
.lesson.done .lnum{background:var(--green);border-color:var(--green);color:#04190f}
.lesson .lt{flex:1;font-weight:700;font-size:1.02rem}
.lesson .lmeta{font-size:.74rem;color:var(--dim)}
.lesson .chev{color:var(--muted);transition:transform .25s}
.lesson.open .chev{transform:rotate(180deg)}
.lesson .lb{display:none;padding:0 1.2rem 1.3rem;border-top:1px solid var(--border)}
.lesson.open .lb{display:block}
.lesson .lb h4{font-size:1.05rem;font-weight:800;margin:1.1rem 0 .5rem;color:var(--text)}
.lesson .lb p{color:#d4d4e4;margin-bottom:.85rem}
.lesson .lb ul,.lesson .lb ol{margin:0 0 .9rem 1.2rem}
.lesson .lb li{margin-bottom:.4rem;color:#d4d4e4}
.lesson .lb strong{color:#fff}
.lesson .lb .callout{background:rgba(59,157,255,.08);border-left:3px solid var(--blue);border-radius:8px;padding:.8rem 1rem;margin:0 0 1rem;font-size:.92rem;color:#cfe3ff}
.lesson .lb .warn{background:rgba(255,84,112,.07);border-left:3px solid var(--red);border-radius:8px;padding:.8rem 1rem;margin:0 0 1rem;font-size:.92rem;color:#ffd2da}
.lesson .lb .tip{background:rgba(25,212,134,.07);border-left:3px solid var(--green);border-radius:8px;padding:.8rem 1rem;margin:0 0 1rem;font-size:.92rem;color:#c8f5e1}

/* knowledge check inside lesson */
.check{background:var(--bg);border:1px solid var(--border2);border-radius:14px;padding:1rem;margin-top:1rem}
.check .ck-q{font-weight:700;margin-bottom:.7rem;font-size:.95rem}
.opt{display:block;width:100%;text-align:left;background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:.65rem .85rem;margin-bottom:.5rem;color:var(--text);font-family:inherit;font-size:.9rem;cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--btc)}
.opt.correct{border-color:var(--green);background:rgba(25,212,134,.12)}
.opt.wrong{border-color:var(--red);background:rgba(255,84,112,.12)}
.opt[disabled]{cursor:default}
.explain{font-size:.85rem;color:var(--muted);margin-top:.5rem;display:none}
.explain.show{display:block}
.lesson-actions{display:flex;gap:.7rem;align-items:center;margin-top:1.1rem;flex-wrap:wrap}
.done-tag{color:var(--green);font-weight:700;font-size:.88rem;display:none;align-items:center;gap:.35rem}
.lesson.done .done-tag{display:inline-flex}
.lesson.done .mark-btn{display:none}

/* ---- QUIZ (final exam / daily) ---- */
.quiz{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:1.3rem}
.quiz .q-prog{font-size:.78rem;color:var(--muted);margin-bottom:.5rem}
.quiz .q-text{font-weight:800;font-size:1.12rem;margin-bottom:1rem;line-height:1.4}
.quiz .q-result{text-align:center;padding:1rem 0}
.quiz .q-result .big{font-size:3rem;font-weight:900;line-height:1}
.quiz .q-result .lbl{color:var(--muted);margin:.4rem 0 1rem}
.ring{width:120px;height:120px;margin:0 auto .6rem;position:relative}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--bg4);border:1px solid var(--border2);color:var(--text);padding:.8rem 1.2rem;border-radius:14px;font-weight:600;font-size:.9rem;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:500;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast .xp{color:var(--green);font-weight:800}

/* ---- PROGRESS HEADER (course) ---- */
.cprog{background:linear-gradient(135deg,var(--bg3),var(--bg2));border:1px solid var(--border2);border-radius:20px;padding:1.2rem;display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap}
.cprog .ico{font-size:2.4rem}
.cprog .cp-meta{flex:1;min-width:200px}
.cprog .cp-name{font-weight:800;font-size:1.1rem}
.cprog .cp-sub{font-size:.8rem;color:var(--muted);margin:.15rem 0 .55rem}

/* ---- FUNNEL / CTA blocks ---- */
.funnel{background:linear-gradient(135deg,rgba(247,147,26,.1),var(--bg2));border:1px solid var(--btc);border-radius:20px;padding:1.4rem}
.funnel h3{color:var(--btc);font-size:1.2rem;font-weight:800;margin-bottom:.4rem}
.funnel p{color:var(--muted);font-size:.92rem;margin-bottom:.9rem}
.funnel .links{display:flex;gap:.6rem;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:.35rem;background:var(--bg3);border:1px solid var(--border2);border-radius:999px;padding:.5rem 1rem;font-size:.85rem;font-weight:700;color:var(--text)}
.chip:hover{border-color:var(--btc)}

/* ---- EMAIL CAPTURE ---- */
.email-cap{background:var(--bg2);border:1px dashed var(--border2);border-radius:20px;padding:1.4rem;text-align:center}
.email-cap h3{font-weight:800;font-size:1.15rem;margin-bottom:.3rem}
.email-cap p{color:var(--muted);font-size:.88rem;margin-bottom:1rem}
.email-form{display:flex;gap:.5rem;max-width:420px;margin:0 auto;flex-wrap:wrap}
.email-form input{flex:1;min-width:180px;background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:.75rem 1.1rem;color:var(--text);font-family:inherit;font-size:.92rem}
.email-form input:focus{outline:none;border-color:var(--btc)}
.cap-status{font-size:.82rem;color:var(--muted);margin-top:.6rem;min-height:1.1em}

/* ---- MODAL / CERTIFICATE ---- */
.modal{position:fixed;inset:0;background:rgba(5,5,9,.82);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;z-index:600;padding:1rem}
.modal.show{display:flex}
.modal-box{background:var(--bg2);border:1px solid var(--border2);border-radius:22px;padding:1.4rem;max-width:560px;width:100%;box-shadow:var(--shadow);max-height:92vh;overflow:auto}
.modal-box h3{font-size:1.3rem;font-weight:800;margin-bottom:.3rem}
.modal-box .x{float:right;background:none;border:none;color:var(--muted);font-size:1.5rem;cursor:pointer;line-height:1}
.cert-name-row{display:flex;gap:.5rem;margin:1rem 0;flex-wrap:wrap}
.cert-name-row input{flex:1;min-width:180px;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:.7rem 1rem;color:var(--text);font-family:inherit}
#certCanvas{width:100%;height:auto;border-radius:12px;border:1px solid var(--border);margin-top:.6rem;background:#0a0a0f}

/* ---- FOOTER ---- */
footer.bca{border-top:1px solid var(--border);padding:2.2rem 1.1rem;text-align:center;color:var(--muted);font-size:.82rem;margin-top:1.5rem}
footer.bca .fl{display:flex;gap:1.1rem;justify-content:center;flex-wrap:wrap;margin-bottom:.9rem}
footer.bca .fl a{color:var(--muted);font-weight:600}
footer.bca .fl a:hover{color:var(--btc)}
footer.bca .disc{max-width:640px;margin:0 auto;font-size:.76rem;color:var(--dim);line-height:1.6}

/* ---- misc ---- */
.divider{height:1px;background:var(--border);margin:1.5rem 0;border:none}
.reset-link{background:none;border:none;color:var(--dim);font-size:.78rem;cursor:pointer;text-decoration:underline;font-family:inherit}
.reset-link:hover{color:var(--muted)}
.locked{opacity:.55}
.confetti{position:fixed;width:9px;height:9px;z-index:550;pointer-events:none;will-change:transform,opacity}