/* KasTerang — design system */
:root{--bg:#0b0f0c;--card:#131a15;--border:#233328;--text:#e8f0ea;--muted:#93a89a;--green:#22c55e;--green-dim:#16a34a;--amber:#f59e0b;--red:#ef4444;--radius:14px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}

/* ===== nav ===== */
.nav{position:sticky;top:0;z-index:50;background:#0b0f0cee;backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav .wrap{display:flex;align-items:center;gap:18px;padding-top:12px;padding-bottom:12px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);font-weight:800;font-size:18px;letter-spacing:-.3px}
.logo svg{width:26px;height:26px}
.logo em{color:var(--green);font-style:normal}
.navlinks{margin-left:auto;display:flex;gap:4px;overflow-x:auto}
.navlinks a{color:var(--muted);text-decoration:none;font-size:13px;font-weight:600;padding:7px 11px;border-radius:8px;white-space:nowrap}
.navlinks a:hover,.navlinks a.active{color:var(--green);background:#22c55e14}

/* ===== hero ===== */
.hero{text-align:center;padding:72px 20px 40px}
.badge{display:inline-block;background:#16a34a22;color:var(--green);border:1px solid #22c55e44;padding:6px 14px;border-radius:99px;font-size:13px;font-weight:600;margin-bottom:20px}
h1{font-size:clamp(28px,5vw,46px);font-weight:800;line-height:1.15;letter-spacing:-.5px}
h1 .hl{color:var(--green)}
.sub{color:var(--muted);font-size:clamp(15px,2.5vw,18px);max-width:560px;margin:18px auto 0}

/* ===== cards & form ===== */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin:32px 0}
h2{font-size:22px;font-weight:700;margin-bottom:6px}
.hint{color:var(--muted);font-size:13px;margin-bottom:18px}
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px;font-weight:600}
input,select{width:100%;background:#0d130f;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:12px 14px;font-size:16px;font-family:inherit}
input:focus,select:focus{outline:none;border-color:var(--green)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.row{grid-template-columns:1fr}}
.btn{display:inline-block;background:var(--green);color:#052e16;border:none;border-radius:10px;padding:13px 28px;font-size:16px;font-weight:700;cursor:pointer;font-family:inherit;width:100%;margin-top:18px;text-decoration:none;text-align:center}
.btn:hover{background:var(--green-dim)}
.btn.secondary{background:transparent;border:1px solid var(--green);color:var(--green)}
.btn.wa{background:#25d366;color:#052e16;border:none}
.btn.wa:hover{background:#1fbe5c}

/* ===== result ===== */
.result{margin-top:20px;border-top:1px dashed var(--border);padding-top:18px;display:none}
.result.show{display:block}
.rline{display:flex;justify-content:space-between;padding:7px 0;font-size:15px;border-bottom:1px solid #1b241e}
.rline span:last-child{font-weight:600}
.rline.dim span{color:var(--muted)}
.rline.total{font-size:18px;border-bottom:none;margin-top:6px}
.rline.total .ok{color:var(--green)} .rline.total .bad{color:var(--red)}
.big{font-size:clamp(26px,5vw,34px);font-weight:800;text-align:center;padding:14px 0 4px}
.big.ok{color:var(--green)} .big.bad{color:var(--red)}
.bigsub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:10px}
.warn{background:#f59e0b14;border:1px solid #f59e0b33;color:#fbbf24;border-radius:10px;padding:10px 14px;font-size:13px;margin-top:14px}

/* ===== tabs ===== */
.tabs{display:flex;gap:8px;margin-bottom:4px}
.tab{flex:1;text-align:center;padding:10px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer;font-family:inherit;font-weight:600;font-size:14px}
.tab.active{background:var(--green);color:#052e16;border-color:var(--green)}

/* ===== features & tools grid ===== */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:32px 0}
.feat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.feat h3{font-size:15px;margin-bottom:6px}
.feat p{color:var(--muted);font-size:14px}
.feat .ic{font-size:20px;margin-bottom:8px;display:block}
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin:24px 0}
.tool{display:block;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;text-decoration:none;color:var(--text);transition:border-color .15s}
.tool:hover{border-color:var(--green)}
.tool b{display:block;font-size:14px;margin-bottom:4px}
.tool span{color:var(--muted);font-size:12px}

/* ===== breadcrumb ===== */
.crumb{font-size:13px;color:var(--muted);padding:20px 0 0}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--green)}

/* ===== faq ===== */
.faq{margin:32px 0}
.faq details{background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:600;font-size:15px;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::after{content:"+";color:var(--green);font-size:20px;font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--muted);font-size:14px;padding-bottom:16px}
.faq h2{margin-bottom:16px}

/* ===== waitlist ===== */
.waitlist{text-align:center}
.waitlist form{display:flex;gap:10px;max-width:480px;margin:16px auto 0}
.waitlist input{flex:1}
.waitlist .btn{width:auto;margin:0;white-space:nowrap}
@media(max-width:560px){.waitlist form{flex-direction:column}.waitlist .btn{width:100%}}
.note{color:var(--muted);font-size:12px;margin-top:12px}
.msg{margin-top:14px;padding:12px;border-radius:10px;font-size:14px;display:none}
.msg.ok{display:block;background:#22c55e1a;color:var(--green);border:1px solid #22c55e44}
.msg.err{display:block;background:#ef44441a;color:var(--red);border:1px solid #ef444433}

/* ===== footer ===== */
footer{color:var(--muted);text-align:center;font-size:13px;padding:40px 20px;border-top:1px solid var(--border);margin-top:40px}
footer a{color:var(--muted)}
.fee-note{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.5}
.explainer h3{font-size:16px;margin:20px 0 8px}
.explainer p,.explainer li{color:var(--muted);font-size:14px}
.explainer ul,.explainer ol{padding-left:20px}
.explainer table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0}
.explainer th,.explainer td{border:1px solid var(--border);padding:8px 10px;text-align:left}
.explainer th{color:var(--muted);font-weight:600}