:root{
  --g1:#059669; --g2:#10b981; --g3:#34d399; --teal:#14b8a6;
  --sky:#0ea5e9; --violet:#8b5cf6; --rose:#f43f5e; --amber:#f59e0b; --lime:#84cc16;
  --grad:linear-gradient(135deg,#059669,#14b8a6);
  --grad-rainbow:linear-gradient(90deg,#059669,#0ea5e9,#8b5cf6,#f43f5e,#f59e0b);
  --ink:#0f172a; --body:#334155; --muted:#64748b; --line:#e2e8f0;
  --bg:#f8fafc; --card:#ffffff;
  --amber-bg:#fffbeb; --amber-line:#fcd34d;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 4px 6px -1px rgba(15,23,42,.07),0 2px 4px -2px rgba(15,23,42,.06);
  --shadow-lg:0 20px 40px -12px rgba(5,150,105,.18);
  --r:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{overflow-x:clip}
body{font-family:'Plus Jakarta Sans',-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:var(--body);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;
  background:
    radial-gradient(900px 420px at -10% -5%,rgba(16,185,129,.09),transparent 60%),
    radial-gradient(800px 400px at 110% 0%,rgba(14,165,233,.09),transparent 60%),
    radial-gradient(700px 500px at 50% 115%,rgba(139,92,246,.07),transparent 60%),
    var(--bg);
  background-attachment:fixed}
.wrap{max-width:860px;margin:0 auto;padding:0 22px}

/* ---------- nav ---------- */
nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(226,232,240,.8)}
nav::after{content:"";display:block;height:3px;background:var(--grad-rainbow)}
nav .wrap{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding-top:14px;padding-bottom:11px}
.brand{font-weight:800;font-size:1.12rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em;margin-right:auto}
.brand span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
nav a.nl{color:var(--muted);text-decoration:none;font-size:.88rem;font-weight:600;
  padding:7px 14px;border-radius:999px;transition:.18s}
nav a.nl:hover{color:var(--g1);background:#ecfdf5}
nav a.nl.on{color:#fff;background:var(--grad);box-shadow:0 2px 8px rgba(5,150,105,.35)}

/* ---------- hero / headings ---------- */
main{padding:44px 0 10px}
.hero{position:relative;text-align:center;padding:28px 0 14px}
.hero::before{content:"";position:absolute;inset:-60px -300px auto;height:360px;z-index:-1;
  background:
    radial-gradient(380px 190px at 22% 15%,rgba(16,185,129,.20),transparent 70%),
    radial-gradient(360px 200px at 78% 8%,rgba(14,165,233,.18),transparent 70%),
    radial-gradient(300px 170px at 55% 60%,rgba(139,92,246,.13),transparent 70%),
    radial-gradient(260px 150px at 12% 70%,rgba(245,158,11,.14),transparent 70%),
    radial-gradient(240px 140px at 90% 65%,rgba(244,63,94,.10),transparent 70%);
  pointer-events:none}
.eyebrow{display:inline-block;color:#0f766e;border:1px solid transparent;
  background:linear-gradient(#f0fdfa,#f0fdfa) padding-box,var(--grad-rainbow) border-box;
  font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:6px 16px;border-radius:999px;margin-bottom:18px}
h1{font-size:clamp(1.7rem,4.5vw,2.6rem);line-height:1.15;color:var(--ink);
  letter-spacing:-.03em;font-weight:800;margin-bottom:14px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#059669,#0ea5e9,#8b5cf6);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sub{color:var(--muted);max-width:620px;margin:0 auto 30px;font-size:1.02rem}
main:not(:has(.hero)) .sub,.sub.left{margin-left:0;text-align:left}
h2{font-size:1.35rem;color:var(--ink);letter-spacing:-.02em;font-weight:800;margin:44px 0 14px}
h2::after{content:"";display:block;width:52px;height:4px;border-radius:2px;margin-top:6px;background:var(--grad-rainbow)}
h3{font-size:1.05rem;color:var(--ink);font-weight:700;margin:24px 0 8px}
p{margin:10px 0}
main a{color:var(--g1);font-weight:600;text-decoration-color:#a7f3d0;text-underline-offset:3px}
ul,ol{margin:10px 0 10px 24px}
li{margin:6px 0}
ul li::marker{color:var(--sky);font-weight:700}
ol li::marker{color:var(--violet);font-weight:700}

/* ---------- calculator card ---------- */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:28px;box-shadow:var(--shadow),var(--shadow-lg);position:relative;overflow:hidden}
.calc::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--grad-rainbow)}
.calc .row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.calc .field{flex:1;min-width:180px}
label{display:block;font-size:.8rem;font-weight:700;margin-bottom:6px;color:var(--ink)}
input,select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;
  font-size:1rem;font-family:inherit;background:#fff;color:var(--ink);transition:.15s;box-shadow:var(--shadow-sm)}
input:hover,select:hover{border-color:#7dd3fc}
input:focus,select:focus{outline:none;border-color:var(--sky);box-shadow:0 0 0 4px rgba(14,165,233,.18)}
button{background:var(--grad);color:#fff;border:0;border-radius:12px;padding:14px 30px;
  font-size:1rem;font-weight:700;font-family:inherit;cursor:pointer;
  box-shadow:0 4px 14px rgba(5,150,105,.35);transition:.18s}
button:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(5,150,105,.42)}
button:active{transform:translateY(0)}
button.ghost{background:#fff;color:#0369a1;border:1.5px solid #7dd3fc;box-shadow:var(--shadow-sm);margin:4px 6px 0 0}
button.ghost:hover{background:#f0f9ff;box-shadow:var(--shadow)}

/* ---------- results ---------- */
.results{margin-top:24px;display:none}
.results.show{display:block;animation:up .4s ease}
@keyframes up{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:16px 0}
.stat{border-radius:14px;padding:18px 14px;text-align:center;
  background:linear-gradient(160deg,#ecfdf5,#d1fae5);border:1px solid #a7f3d0}
.stat .v{font-size:1.4rem;font-weight:800;letter-spacing:-.02em;color:#065f46}
.stat .k{font-size:.76rem;font-weight:600;color:#047857;margin-top:3px}
.stat:nth-child(2){background:linear-gradient(160deg,#f0f9ff,#e0f2fe);border-color:#7dd3fc}
.stat:nth-child(2) .v{color:#075985}.stat:nth-child(2) .k{color:#0369a1}
.stat:nth-child(3){background:linear-gradient(160deg,#faf5ff,#f3e8ff);border-color:#d8b4fe}
.stat:nth-child(3) .v{color:#6b21a8}.stat:nth-child(3) .k{color:#7e22ce}
.stat:nth-child(4){background:linear-gradient(160deg,#fffbeb,#fef3c7);border-color:#fcd34d}
.stat:nth-child(4) .v{color:#92400e}.stat:nth-child(4) .k{color:#b45309}
.stat.warn{background:linear-gradient(160deg,#fef2f2,#fee2e2)!important;border-color:#fecaca!important}
.stat.warn .v{color:#b91c1c!important}.stat.warn .k{color:#dc2626!important}

/* ---------- tables ---------- */
.tbl-scroll{overflow-x:auto;border-radius:14px;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);margin:16px 0;background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--card)}
.tbl-scroll table{margin:0}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
th{background:linear-gradient(90deg,#059669,#0d9488,#0284c7);color:#fff;font-weight:700;font-size:.85rem;
  letter-spacing:.02em;border-bottom:0}
tr:last-child td{border-bottom:0}
tbody tr:nth-child(even),tr:nth-child(even) td{background:#f8fafc}
td strong{color:var(--ink)}

/* ---------- affiliate box ---------- */
.affbox{background:linear-gradient(160deg,#fffbeb,#fff7ed);border:1px solid var(--amber-line);border-radius:var(--r);
  padding:24px 26px;margin:44px 0;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.affbox::before{content:"";position:absolute;top:0;left:0;bottom:0;width:5px;
  background:linear-gradient(#f59e0b,#f43f5e)}
.affbox h2{margin:0 0 4px;font-size:1.15rem;color:#92400e}
.affbox h2::after{display:none}
.aff-disclose{font-size:.76rem;color:#a16207;margin-bottom:6px}
.aff-item{display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:14px 0;border-top:1px dashed var(--amber-line)}
.aff-item .t{font-weight:700;color:var(--ink)}
.aff-item .d{font-size:.86rem;color:var(--muted)}
.price-chip{display:inline-block;margin-top:7px;font-size:.76rem;font-weight:700;color:#065f46;
  background:#ecfdf5;border:1px solid #a7f3d0;border-radius:999px;padding:2px 11px}
.aff-item a{flex-shrink:0;background:linear-gradient(135deg,#f59e0b,#f43f5e);color:#fff;
  text-decoration:none;border-radius:10px;padding:10px 18px;font-size:.86rem;font-weight:700;
  box-shadow:0 3px 10px rgba(244,63,94,.3);transition:.18s}
.aff-item a:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(244,63,94,.4)}

/* ---------- cards grid (home) ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin:26px 0}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:26px;text-decoration:none;color:var(--body);display:block;
  box-shadow:var(--shadow-sm);transition:.22s;position:relative;overflow:hidden}
.tool-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;opacity:.9}
.tool-card::after{content:"→";position:absolute;right:20px;bottom:16px;font-size:1.1rem;
  opacity:0;transition:.22s;transform:translateX(-6px)}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow),var(--shadow-lg)}
.tool-card:hover::after{opacity:1;transform:none}
.tool-card .ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;
  justify-content:center;font-size:1.5rem;margin-bottom:14px}
.tool-card h3{margin:0 0 6px;color:var(--ink);font-size:1.08rem}
.tool-card p{color:var(--muted);font-size:.89rem;margin:0}
.tool-card .tag{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.05em;
  text-transform:uppercase;border-radius:999px;padding:3px 10px;margin-bottom:10px}
/* per-card accent colors: 1=emerald 2=sky 3=violet — repeats per grid */
.grid .tool-card:nth-child(3n+1)::before{background:linear-gradient(90deg,#059669,#34d399)}
.grid .tool-card:nth-child(3n+1) .ico{background:linear-gradient(135deg,#ecfdf5,#d1fae5);border:1px solid #a7f3d0}
.grid .tool-card:nth-child(3n+1) .tag{color:#047857;background:#ecfdf5}
.grid .tool-card:nth-child(3n+1)::after{color:#10b981}
.grid .tool-card:nth-child(3n+1):hover{border-color:#6ee7b7}
.grid .tool-card:nth-child(3n+2)::before{background:linear-gradient(90deg,#0284c7,#38bdf8)}
.grid .tool-card:nth-child(3n+2) .ico{background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border:1px solid #7dd3fc}
.grid .tool-card:nth-child(3n+2) .tag{color:#0369a1;background:#f0f9ff}
.grid .tool-card:nth-child(3n+2)::after{color:#0ea5e9}
.grid .tool-card:nth-child(3n+2):hover{border-color:#7dd3fc}
.grid .tool-card:nth-child(3n)::before{background:linear-gradient(90deg,#7c3aed,#a78bfa)}
.grid .tool-card:nth-child(3n) .ico{background:linear-gradient(135deg,#faf5ff,#f3e8ff);border:1px solid #d8b4fe}
.grid .tool-card:nth-child(3n) .tag{color:#7e22ce;background:#faf5ff}
.grid .tool-card:nth-child(3n)::after{color:#8b5cf6}
.grid .tool-card:nth-child(3n):hover{border-color:#c4b5fd}

/* ---------- guide pages ---------- */
.figure{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;margin:18px 0;text-align:center;box-shadow:var(--shadow-sm)}
.figure figcaption{font-size:.85rem;color:var(--muted);margin-top:10px}
.grid .figure{margin:0}
.callout{background:linear-gradient(135deg,#ecfdf5,#f0f9ff);border-left:4px solid var(--teal);
  border-radius:0 12px 12px 0;padding:14px 18px;margin:18px 0;font-size:.95rem}
.callout.red{background:linear-gradient(135deg,#fef2f2,#fff7ed);border-color:#f87171}

/* ---------- footer ---------- */
footer{background:linear-gradient(160deg,#0f172a,#1e1b4b);color:#94a3b8;margin-top:64px;
  padding:36px 0;font-size:.88rem;border-top:3px solid transparent;position:relative}
footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad-rainbow)}
footer a{color:#5eead4;text-decoration:none;font-weight:600}
footer .cols{display:flex;gap:28px;flex-wrap:wrap;justify-content:space-between;align-items:center}

@media(max-width:600px){
  .aff-item{flex-direction:column;align-items:flex-start}
  .calc{padding:20px}
}
@media print{nav,.affbox,footer,button,.no-print{display:none!important}body{background:#fff}
  .calc{box-shadow:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}