*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--purple:#433f69;--purple-dark:#2e2b4a;--purple-light:#6c67a3;--green:#58cc02;--green-dark:#46a302;--orange:#f5a623;--red:#e05555;--bg:#f9f9ff;--white:#fff;--text:#2d2d3a;--muted:#6b6b80;--line:#e4e3f0;--radius:14px}
html{scroll-behavior:smooth}
body{font-family:'Nunito',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;font-size:17px}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
a{color:var(--purple);font-weight:700}
a:hover{color:var(--green-dark)}

header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:10px;padding-bottom:10px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;font-size:1.02rem;color:var(--purple-dark)}
.logo b{color:var(--green-dark)}
nav.main{display:flex;gap:14px;flex-wrap:wrap}
nav.main a{text-decoration:none;font-size:.92rem;color:var(--muted)}
nav.main a:hover{color:var(--purple)}
@media(max-width:640px){header.site .wrap{flex-direction:column;align-items:flex-start;gap:2px;padding-bottom:8px}nav.main{gap:12px}nav.main a{font-size:.85rem}}

main{padding:28px 0 56px}
h1{color:var(--purple-dark);font-size:1.9rem;line-height:1.25;margin:6px 0 12px;font-weight:900}
.h1sub{font-size:1.1rem;color:var(--muted);font-weight:700}
h2{color:var(--purple-dark);font-size:1.3rem;margin:34px 0 12px;font-weight:800}
p{margin:0 0 14px}
ul,ol{margin:0 0 16px 22px}
li{margin-bottom:6px}
.lede{font-size:1.06rem;color:#4a4a5e}
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:8px}
.crumb a{color:var(--muted);font-weight:700;text-decoration:none}
.chip{display:inline-block;background:var(--purple);color:#fff;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px;padding:3px 10px;border-radius:20px}
.note{background:#fff8e8;border:1px solid #f3e2b3;border-radius:10px;padding:10px 14px;font-size:.95rem}

table{width:100%;border-collapse:collapse;margin:0 0 16px;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 1px 3px rgba(67,63,105,.08)}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;font-size:.95rem}
thead th{background:var(--purple);color:#fff;font-weight:800;font-size:.85rem}
tbody tr:last-child td{border-bottom:none}
code{font-family:ui-monospace,Menlo,monospace;font-size:.86em;background:#f0effa;padding:2px 6px;border-radius:6px;color:var(--purple-dark);white-space:nowrap}
.tablewrap,{overflow-x:auto}
@media(max-width:640px){table{display:block;overflow-x:auto;white-space:nowrap}}

.b{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;color:#fff;font-weight:900;font-size:.8rem}
.b.plus{background:var(--green)}
.b.minus{background:var(--red)}
.b.tanya{background:var(--orange)}
.signals{line-height:2.2}
.sig{background:#eceaf8;color:var(--purple-dark);border-radius:16px;padding:4px 12px;font-size:.88rem;font-weight:700;white-space:nowrap}
ul.fungsi li{margin-bottom:9px}

.mistake{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:10px}
.mrow{display:flex;gap:16px;flex-wrap:wrap;font-size:.98rem}
.wrong{color:var(--red);text-decoration:line-through;text-decoration-thickness:1px}
.right{color:var(--green-dark);font-weight:800}
.mnote{color:var(--muted);font-size:.9rem;margin:6px 0 0}

.quizsec{background:linear-gradient(160deg,var(--purple-dark),var(--purple));border-radius:var(--radius);padding:22px;margin:30px 0 18px;color:#fff}
.quizsec h2{color:#fff;margin-top:0}
.quiz-lede{color:#cfcde6;font-size:.95rem}
.qcard{background:#fff;color:var(--text);border-radius:12px;padding:16px 18px}
.qnum{font-size:.8rem;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.qtext{font-size:1.08rem;font-weight:800;margin:6px 0 14px}
.opt{display:block;width:100%;text-align:left;background:#f6f5fc;border:2px solid var(--line);border-radius:10px;padding:10px 14px;margin-bottom:8px;font:inherit;font-weight:700;cursor:pointer;transition:border-color .12s}
.opt:hover{border-color:var(--purple-light)}
.opt.correct{border-color:var(--green);background:#f0fbe6}
.opt.incorrect{border-color:var(--red);background:#fdeeee}
.opt:disabled{cursor:default;opacity:.92}
.why{background:#fff}
.qwhy{background:#f0effa;border-radius:10px;padding:10px 14px;font-size:.94rem;margin-top:10px}
.qnav{margin-top:14px;display:flex;justify-content:space-between;align-items:center}
.qnext{background:var(--green);color:#fff;border:none;border-radius:10px;padding:10px 22px;font:inherit;font-weight:900;cursor:pointer}
.qnext:hover{background:var(--green-dark)}
.qprog{font-size:.85rem;color:var(--muted);font-weight:700}
.qscore{text-align:center;padding:10px 0}
.qscore .big{font-size:2.2rem;font-weight:900;color:var(--purple-dark)}
.qscore p{margin:8px 0}

.wsbox{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fff;border:2px dashed var(--purple-light);border-radius:var(--radius);padding:14px 18px;margin:18px 0}
.wsbox span{color:var(--muted);font-size:.9rem}
.wsbox button{background:var(--purple);color:#fff;border:none;border-radius:10px;padding:11px 20px;font:inherit;font-weight:900;cursor:pointer;white-space:nowrap}
.wsbox button:hover{background:var(--purple-dark)}
@media(max-width:560px){.wsbox{flex-direction:column;align-items:stretch;text-align:center}}

#vsearch{width:100%;padding:12px 16px;font:inherit;border:2px solid var(--line);border-radius:10px;margin-bottom:14px}
#vsearch:focus{outline:none;border-color:var(--purple-light)}

.pn{display:flex;justify-content:space-between;gap:10px;margin-top:36px;flex-wrap:wrap}
.pn a{text-decoration:none;font-size:.92rem}

.hero{background:linear-gradient(135deg,var(--purple-dark),var(--purple) 55%,var(--purple-light));border-radius:var(--radius);color:#fff;padding:40px 32px;margin-bottom:8px}
.hero h1{color:#fff;font-size:2.1rem}
.hero em{color:#b8f28b;font-style:normal}
.hero p{color:#d9d7ee;max-width:560px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{background:var(--green);color:#fff;text-decoration:none;font-weight:900;border-radius:12px;padding:12px 22px}
.btn:hover{background:var(--green-dark);color:#fff}
.btn.ghost{background:transparent;border:2px solid #8d88c2}
.btn.ghost:hover{border-color:#fff;background:transparent}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin-bottom:8px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;box-shadow:0 1px 3px rgba(67,63,105,.07);transition:transform .12s,box-shadow .12s}
.card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(67,63,105,.13)}
.card b{color:var(--purple-dark);font-size:1.02rem}
.card span{display:block;color:var(--muted);font-size:.88rem;margin-top:5px;font-weight:400}
.card.hl{border-color:var(--green);border-width:2px}

footer.site{background:var(--purple-dark);color:#b9b6d6;padding:30px 0 24px;font-size:.88rem}
.foot-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:22px;margin-bottom:20px}
.foot-cols h3{font-size:.78rem;text-transform:uppercase;letter-spacing:1px;color:#8d88b8;margin:0 0 8px}
.foot-cols h3 a{color:#8d88b8}
.foot-cols a{display:block;color:#d9d7ee;text-decoration:none;font-weight:600;padding:2px 0}
footer.site a:hover{color:#fff}
.foot-note{color:#8d88b8;border-top:1px solid #43406a;padding-top:14px}