:root{
  --bg:#f5f9f8;--paper:#fff;--ink:#12292d;--muted:#5f7478;--line:#e1ebe9;
  --brand:#14877c;--brand2:#0f6b62;--brand-soft:#dcf3ef;--sun:#ffbe3d;--sun-soft:#fff1cc;
  --ok:#14804f;--ok-soft:#dcf5e8;--maybe:#9a5b00;--maybe-soft:#ffecc4;
  --r:22px;--shadow:0 1px 2px rgba(18,41,45,.04),0 10px 30px rgba(18,41,45,.07);--shadow-lg:0 18px 50px rgba(18,41,45,.14)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Heebo,"Segoe UI",Arial,sans-serif;font-size:17px;line-height:1.65;-webkit-text-size-adjust:100%;overflow-x:hidden}
a{color:var(--brand2)}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:10px}
button{font:inherit;cursor:pointer;border:0;color:inherit;background:none}
img,svg{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.ic{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* header */
.bar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.82);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.3rem}
.brand img{width:36px;height:36px}
.navbtn{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;background:var(--ink);color:#fff;font-weight:700;font-size:.95rem;transition:transform .15s,background .15s}
.navbtn:hover{background:var(--brand2);transform:translateY(-1px)}
.navbtn .ic{font-size:1.15em}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;min-height:50px;text-decoration:none;transition:transform .15s,background .15s,box-shadow .15s}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand2)}
.btn.sun{background:var(--sun);color:#3a2600;box-shadow:0 6px 16px rgba(255,190,61,.38)}.btn.sun:hover{filter:brightness(.96);transform:translateY(-1px)}
.btn.ghost{background:var(--paper);border:2px solid var(--line)}.btn.ghost:hover{border-color:var(--brand)}
.btn.big{width:100%;min-height:56px;font-size:1.08rem}
.btn:disabled{opacity:.6;cursor:not-allowed}
.linkbtn{color:var(--brand2);font-weight:700;padding:6px 0}

/* hero */
.hero{position:relative;padding:54px 0 40px;background:
  radial-gradient(640px 320px at 85% -10%,#fff0c9 0,transparent 70%),
  radial-gradient(640px 360px at 5% 100%,#d3f1ec 0,transparent 70%)}
.hero-grid{display:grid;gap:34px;align-items:center}
@media (min-width:920px){.hero-grid{grid-template-columns:1.15fr .85fr}}
.eyebrow{display:inline-block;padding:4px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand2);font-weight:700;font-size:.85rem;margin-bottom:14px}
.eyebrow.light{background:rgba(255,255,255,.2);color:#fff}
.hero h1{font-size:3.2rem;line-height:1.08;margin:0 0 14px;font-weight:800;letter-spacing:-1px}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(transparent 64%,var(--sun-soft) 64%)}
.hero p{margin:0 0 24px;color:var(--muted);font-size:1.15rem;max-width:32em}
.search{position:relative;max-width:560px}
.search input{width:100%;font:inherit;padding:17px 56px 17px 18px;border:2px solid transparent;border-radius:999px;background:var(--paper);box-shadow:var(--shadow)}
.search input:focus{border-color:var(--brand);outline:none}
.search svg{position:absolute;right:20px;top:50%;translate:0 -50%;width:22px;height:22px;stroke:var(--muted);fill:none;stroke-width:2;stroke-linecap:round}
.quick{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:16px;font-size:.92rem;color:var(--muted)}
.quick a{padding:5px 14px;border-radius:999px;background:var(--paper);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:500;transition:.15s}
.quick a:hover{border-color:var(--brand);color:var(--brand2)}
.hv{position:relative;min-height:290px;display:none}
@media (min-width:920px){.hv{display:block}}
.blob{position:absolute;border-radius:50%;filter:blur(2px)}
.blob.b1{width:230px;height:230px;background:linear-gradient(135deg,#bfeae3,#e3f7f3);inset:10px auto auto 20px}
.blob.b2{width:140px;height:140px;background:linear-gradient(135deg,#ffe3a0,#fff3d1);inset:auto 10px 10px auto}
.hv-card{position:absolute;display:flex;align-items:center;gap:12px;background:var(--paper);padding:14px 18px;border-radius:18px;box-shadow:var(--shadow-lg);min-width:230px;animation:float 6s ease-in-out infinite}
.hv-card i{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--ok-soft);color:var(--ok);flex:none;font-size:1.3rem}
.hv-card i.sun{background:var(--maybe-soft);color:var(--maybe)}
.hv-card b{display:block;line-height:1.2}.hv-card small{color:var(--muted)}
.h1c{top:10px;right:0}.h2c{top:112px;left:0;animation-delay:-2s}.h3c{top:214px;right:34px;animation-delay:-4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0 4px}
.stats div{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:14px 10px;text-align:center}
.stats b{display:block;font-size:1.7rem;line-height:1.1;color:var(--brand2);font-weight:800}
.stats span{font-size:.9rem;color:var(--muted)}

/* sections */
h2.sec{font-size:1.6rem;margin:44px 0 16px;font-weight:800;letter-spacing:-.3px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.tile{display:flex;flex-direction:column;gap:6px;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden}
.tile::after{content:"";position:absolute;inset:auto auto -40px -40px;width:120px;height:120px;border-radius:50%;background:var(--tc,#dcf3ef);opacity:.55;transition:transform .3s}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.tile:hover::after{transform:scale(1.5)}
.tile>*{position:relative;z-index:1}
.tile .ico{width:54px;height:54px;border-radius:17px;display:grid;place-items:center;margin-bottom:6px;background:var(--tc,#dcf3ef);color:var(--tf,#0f6b62);font-size:1.7rem}
.tile b{font-size:1.15rem}
.tile .d{color:var(--muted);font-size:.94rem;line-height:1.5;flex:1}
.tile .meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:.88rem;color:var(--muted)}
.tile .go{display:inline-flex;align-items:center;gap:4px;color:var(--brand2);font-weight:700}

.t0{--tc:#dcf3ef;--tf:#0f6b62}.t1{--tc:#fff0c9;--tf:#9a6000}.t2{--tc:#ffe3da;--tf:#b0472a}.t3{--tc:#e6e8ff;--tf:#4b52c4}
.t4{--tc:#e1f4d6;--tf:#3a7a1c}.t5{--tc:#fde0ec;--tf:#a62f63}.t6{--tc:#d9f0fb;--tf:#1b6f99}.t7{--tc:#efe3fb;--tf:#7a3fb0}

.how{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.how div{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:20px;display:flex;flex-direction:column;gap:4px}
.how i{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--sun);color:#3a2600;font-style:normal;font-weight:800;margin-bottom:6px}
.how span{color:var(--muted);font-size:.95rem}
.faq details{background:var(--paper);border:1px solid var(--line);border-radius:16px;margin-bottom:10px;padding:2px 18px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:1.5rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 16px;color:var(--muted)}
.fine{margin:26px 0 0;padding:14px 18px;border-radius:16px;background:var(--sun-soft);font-size:.92rem;color:#5b4310}
.empty{text-align:center;padding:30px 10px;color:var(--muted)}

/* topics chip bar */
.topics{margin:18px 0 0;position:relative}
.chiprow{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;scrollbar-width:thin;-webkit-overflow-scrolling:touch}
.tchip{flex:none;display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--paper);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600;font-size:.93rem;transition:.15s}
.tchip .ic{font-size:1.15em;color:var(--tf)}
.tchip:hover{border-color:var(--tf)}
.tchip.active{background:var(--ink);color:#fff;border-color:var(--ink)}.tchip.active .ic{color:#fff}

/* simulator */
.stage{display:grid;gap:22px;padding:14px 0 44px}
@media (min-width:920px){.stage{grid-template-columns:minmax(0,1fr) 320px;gap:28px}}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:28px}
.phead{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.pico{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:var(--tc);color:var(--tf);font-size:1.5rem}
.phead b{display:block;line-height:1.2}.phead small{color:var(--muted)}
.back{margin-inline-start:auto;padding:8px 16px;border-radius:999px;border:1px solid var(--line);font-weight:600;font-size:.92rem;background:var(--bg)}
.back:hover{border-color:var(--brand)}
.track{display:flex;gap:6px;margin-bottom:24px}
.track i{flex:1;height:8px;border-radius:99px;background:var(--line);transition:background .3s}
.track i.on{background:var(--brand)}.track i.now{background:var(--sun)}
.qtitle{font-size:1.8rem;line-height:1.28;margin:0 0 20px;font-weight:800;letter-spacing:-.3px}
.hint{margin:-10px 0 16px;color:var(--muted);font-size:.93rem}
.choices{display:grid;gap:10px}
@media (min-width:720px){.choices.two{grid-template-columns:1fr 1fr}}
.choice{display:flex;align-items:center;gap:14px;text-align:right;width:100%;padding:16px 18px;min-height:60px;border:2px solid var(--line);border-radius:18px;background:var(--paper);font-weight:500;transition:border-color .15s,background .15s,transform .15s,box-shadow .15s}
.choice:hover{border-color:var(--brand);background:#f3fbf9;transform:translateY(-1px)}
.choice .mark{flex:none;width:26px;height:26px;border-radius:50%;border:2px solid #c5d3d1;display:grid;place-items:center;transition:.15s}
.choice.sq .mark{border-radius:8px}
.choice[aria-pressed="true"]{border-color:var(--brand);background:var(--brand-soft);box-shadow:0 4px 14px rgba(20,135,124,.16)}
.choice[aria-pressed="true"] .mark{background:var(--brand);border-color:var(--brand)}
.choice[aria-pressed="true"] .mark::after{content:"";width:6px;height:11px;border:solid #fff;border-width:0 2.5px 2.5px 0;rotate:40deg;translate:0 -1px}
.nextrow{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.side{display:none}
@media (min-width:920px){.side{display:flex;flex-direction:column;gap:16px;align-self:start;position:sticky;top:84px}}
.card{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.card h3{margin:0 0 10px;font-size:1.05rem}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.chip{background:var(--brand-soft);color:var(--brand2);border-radius:999px;padding:4px 12px;font-size:.88rem}
.olist{list-style:none;margin:0 0 6px;padding:0;display:grid;gap:2px}
.olist a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:12px;text-decoration:none;color:var(--ink);font-weight:500}
.olist a:hover{background:var(--bg)}.olist .ic{color:var(--brand);font-size:1.25em}
.slide{animation:slide .32s ease}
@keyframes slide{from{opacity:0;transform:translateX(-18px)}to{opacity:1;transform:none}}
.calc{display:grid;place-items:center;text-align:center;padding:60px 10px;gap:14px}
.spin{width:58px;height:58px;border-radius:50%;border:6px solid var(--brand-soft);border-top-color:var(--brand);animation:sp .8s linear infinite}
@keyframes sp{to{rotate:360deg}}
.note{font-size:.88rem;color:var(--muted)}

/* results */
.rsum{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin:14px 0 22px;padding:28px;border-radius:28px;color:#fff;background:linear-gradient(135deg,#14877c,#0d5f58 70%);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.rsum::after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.09);inset:-80px auto auto -60px}
.rsum>*{position:relative;z-index:1}
.rsum h1{margin:0 0 10px;font-size:1.9rem;line-height:1.2;font-weight:800}
.rsum-act{display:flex;gap:10px;flex-wrap:wrap}
.rsum .ghost{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.4);color:#fff}.rsum .ghost:hover{background:rgba(255,255,255,.24)}
.counts{display:flex;gap:8px;flex-wrap:wrap}
.pill{border-radius:999px;padding:5px 16px;font-weight:700;font-size:.93rem}
.pill.ok{background:#fff;color:var(--ok)}.pill.maybe{background:var(--sun);color:#3a2600}
.rgrid{display:grid;gap:22px}
@media (min-width:980px){.rgrid{grid-template-columns:minmax(0,1fr) 380px;align-items:start}.rside{position:sticky;top:84px}}
.group{margin:18px 0 10px;font-size:1.05rem;color:var(--muted);font-weight:700}
.coupon{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:20px;margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s}
.coupon:hover{box-shadow:var(--shadow-lg)}
.coupon::before{content:"";position:absolute;inset-block:0;inset-inline-start:0;width:7px;background:var(--ok)}
.coupon.maybe::before{background:var(--sun)}
.coupon summary{list-style:none;cursor:pointer;display:flex;gap:14px;align-items:flex-start;padding:18px 20px 18px 18px;padding-inline-start:26px}
.coupon summary::-webkit-details-marker{display:none}
.coupon summary>div{min-width:0;flex:1}
.stamp{flex:none;font-size:.78rem;font-weight:800;padding:3px 11px;border-radius:9px;border:2px solid currentColor;rotate:-3deg;margin-top:3px}
.stamp.ok{color:var(--ok);background:var(--ok-soft)}.stamp.maybe{color:var(--maybe);background:var(--maybe-soft)}
.coupon h3{margin:0 0 3px;font-size:1.12rem;line-height:1.35}
.coupon .desc{margin:0;color:var(--muted);font-size:.97rem}
.coupon .chev{flex:none;color:var(--brand);transition:rotate .2s;margin-top:4px}
.coupon[open] .chev{rotate:180deg}
.coupon .more{border-top:2px dashed var(--line);padding:16px 26px 18px;margin-inline-start:7px}
.coupon dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.96rem}
.coupon dt{color:var(--muted);font-weight:600}.coupon dd{margin:0}
.coupon .src{margin:14px 0 0;font-size:.9rem;display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}
.vb{border-radius:9px;padding:2px 10px;font-size:.82rem;font-weight:600}
.vb.off{background:var(--ok-soft);color:var(--ok)}.vb.gen{background:var(--sun-soft);color:var(--maybe)}
.cat-chip{font-size:.78rem;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:1px 10px;color:var(--muted);margin-inline-end:6px;font-weight:600}

/* lead */
.lead{background:var(--ink);color:#fff;border-radius:28px;padding:28px;box-shadow:var(--shadow-lg);scroll-margin-top:90px}
.lead h2{margin:0 0 8px;font-size:1.55rem;line-height:1.2}
.lead p{margin:0 0 14px;color:#c6d7d4}
.ticks{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:8px;font-size:.95rem}
.ticks li{padding-inline-start:28px;position:relative}
.ticks li::before{content:"";position:absolute;inset-inline-start:0;top:6px;width:18px;height:18px;border-radius:50%;background:var(--brand)}
.ticks li::after{content:"";position:absolute;inset-inline-start:6px;top:9px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;rotate:40deg}
.lead-form{display:grid;gap:12px}
.fld label{display:block;font-size:.9rem;font-weight:600;margin-bottom:4px;color:#e6f0ee}
.fld small{color:#9db5b1;font-weight:400}
.fld input{width:100%;font:inherit;padding:14px 16px;border-radius:14px;border:2px solid transparent;background:#fff;color:var(--ink)}
.fld input:focus{outline:none;border-color:var(--sun)}
.hpf{position:absolute;inset-inline-start:-9999px;width:1px;height:1px;overflow:hidden}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:.84rem;line-height:1.5;color:#c6d7d4;cursor:pointer}
.consent input{margin-top:3px;width:20px;height:20px;accent-color:var(--sun);flex:none}
.consent a{color:var(--sun)}
.ferr{min-height:1.2em;margin:0;color:#ffb4a2;font-weight:600;font-size:.9rem}
.thanks{text-align:center;padding:20px 6px}
.thanks h2{margin:10px 0 6px}
.bigcheck{display:inline-grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--brand);font-size:2rem;color:#fff}
footer{margin-top:50px;padding:30px 0 44px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;background:var(--paper)}
footer .brand{font-size:1.05rem;margin-bottom:6px}footer .brand img{width:26px;height:26px}
footer a{color:var(--muted)}

/* dialog */
dialog#topicsDlg{border:0;padding:0;border-radius:28px;width:min(760px,calc(100% - 24px));max-height:calc(100% - 40px);box-shadow:0 30px 80px rgba(0,0,0,.3);background:var(--paper);color:var(--ink)}
dialog#topicsDlg::backdrop{background:rgba(18,41,45,.55);backdrop-filter:blur(4px)}
.dlg-in{padding:22px}
.dlg-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.dlg-head h2{margin:0;font-size:1.4rem}
.x{width:42px;height:42px;border-radius:50%;background:var(--bg);display:grid;place-items:center;font-size:1.3rem}
.dlg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.dtile{display:flex;align-items:center;gap:12px;padding:12px;border-radius:16px;border:1px solid var(--line);text-decoration:none;color:inherit;transition:.15s}
.dtile:hover{border-color:var(--tf);background:var(--bg)}
.dtile .ico{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--tc);color:var(--tf);font-size:1.45rem;flex:none}
.dtile small{display:block;color:var(--muted);font-size:.82rem;line-height:1.2}

@media (max-width:640px){
  body{font-size:16.5px}
  .wrap{padding:0 16px}
  .hero{padding:30px 0 26px}.hero h1{font-size:2.15rem}.hero p{font-size:1.02rem}
  .stats{grid-template-columns:repeat(2,1fr)}
  .how{grid-template-columns:1fr}
  .tiles{grid-template-columns:1fr}
  .tile{flex-direction:row;flex-wrap:wrap;align-items:center;column-gap:14px;padding:16px}
  .tile .ico{margin:0}.tile b{flex:1}.tile .d{flex-basis:100%}.tile .meta{flex-basis:100%}
  .panel{padding:20px;border-radius:24px}
  .qtitle{font-size:1.45rem}
  .navbtn span{display:none}.navbtn{padding:10px 12px}
  .nextrow:not(.actions){position:sticky;bottom:0;margin:12px -4px 0;padding:14px 4px 6px;background:linear-gradient(transparent,var(--paper) 35%)}
  .nextrow .btn{flex:1}
  .rsum{padding:22px;border-radius:24px}.rsum h1{font-size:1.5rem}
  .rsum-act{width:100%}.rsum-act .btn{flex:1}
  .coupon summary{display:grid;grid-template-columns:1fr auto;gap:8px 10px;align-items:center;padding-inline-start:22px}
  .coupon summary .stamp{justify-self:start;margin:0}
  .coupon summary .chev{grid-column:2;grid-row:1;margin:0}
  .coupon summary>div{grid-column:1 / -1}
  .coupon .more{padding:14px 20px 16px}
  .lead{padding:22px;border-radius:24px}
  .nextrow.actions .btn{flex:1 1 140px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.bar,.nextrow,.search,.topics,.lead,.rsum-act,footer{display:none!important}.coupon{break-inside:avoid;box-shadow:none}.coupon .more{display:block}}

/* static content pages (topics, guides, calculators) */
.snav{display:flex;align-items:center;gap:6px}
.snav a{padding:8px 12px;border-radius:999px;text-decoration:none;color:var(--ink);font-weight:600;font-size:.95rem}
.snav a:hover{background:var(--bg)}
.snav a.navbtn{background:var(--ink);color:#fff}
.snav a.navbtn:hover{background:var(--brand2)}
.art{max-width:820px;padding-top:22px;padding-bottom:20px}
.art h1{font-size:2.2rem;line-height:1.2;margin:10px 0 8px;font-weight:800;letter-spacing:-.5px}
.art h2{font-size:1.5rem;margin:34px 0 10px;font-weight:800;line-height:1.3;scroll-margin-top:84px}
.art h3{font-size:1.15rem;margin:20px 0 4px}
.art p,.art li{color:#2c4247}
.art ul{padding-inline-start:22px}
.crumbs{font-size:.88rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:4px}
.crumbs a{color:var(--muted)}
.meta{color:var(--muted);font-size:.9rem;margin:0 0 14px}
.answer{background:linear-gradient(135deg,var(--brand-soft),#f1fbf8);border:1px solid #bfe5df;border-radius:22px;padding:18px 22px;margin:14px 0 18px}
.answer b{display:inline-block;background:var(--brand);color:#fff;border-radius:999px;padding:1px 12px;font-size:.82rem;margin-bottom:6px}
.answer p{margin:0;font-size:1.08rem;color:var(--ink)}
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;background:var(--ink);color:#fff;border-radius:22px;padding:16px 20px;margin:18px 0}
.cta-band b{display:block}.cta-band span{font-size:.9rem;color:#b9cdc9}
.toc{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:14px 20px;margin:16px 0}
.toc ol{margin:6px 0 0;padding-inline-start:22px}.toc a{text-decoration:none}
.tbl{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:16px;background:var(--paper)}
.art table{width:100%;border-collapse:collapse;font-size:.96rem}
.art th{background:var(--brand-soft);text-align:right;padding:10px 14px;font-weight:700}
.art td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}
.faqs h3{margin:18px 0 4px}.faqs p{margin:0}
.srcs ul{font-size:.93rem}
.glist{list-style:none;padding:0;margin:10px 0;display:grid;gap:10px}
.glist li{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:14px 18px}
.glist a{font-weight:700;text-decoration:none;display:block}.glist span{color:var(--muted);font-size:.93rem}
.rblock{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:16px 20px;margin:12px 0}
.rblock h3{margin:0 0 4px}.rblock p{margin:0 0 8px}
.rblock dl{margin:8px 0;display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:.95rem}
.rblock dt{color:var(--muted);font-weight:600}.rblock dd{margin:0}
.srcl{font-size:.88rem;display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}
.cform{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));align-items:end;background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:18px}
.cform label{display:grid;gap:4px;font-weight:600;font-size:.92rem}
.cform input{font:inherit;padding:12px 14px;border:2px solid var(--line);border-radius:12px}
.cform input:focus{border-color:var(--brand);outline:none}
.cres{margin-top:14px;background:var(--sun-soft);border-radius:18px;padding:4px 20px;font-size:1.1rem}
.cres p{margin:12px 0}
.fgrid{display:grid;gap:26px;grid-template-columns:1.2fr 1fr 1fr}
footer ul{list-style:none;margin:6px 0 0;padding:0;display:grid;gap:3px;font-size:.9rem}
footer .b2{display:block;margin-top:14px}
@media (max-width:760px){.fgrid{grid-template-columns:1fr}.art h1{font-size:1.7rem}.snav a:not(.navbtn){padding:8px 8px;font-size:.9rem}}

/* theme button, AI assistant, history, dark mode */
.themebtn{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--bg);border:1px solid var(--line);margin-inline-start:auto;margin-inline-end:8px;flex:none}
.themebtn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.themebtn:hover{border-color:var(--brand)}
.aipill{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;background:linear-gradient(135deg,var(--brand),#2fb3a6);color:#fff;font-weight:700;border:0}
.aipill svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ai-fab{position:fixed;left:18px;bottom:18px;z-index:40;display:inline-flex;align-items:center;gap:8px;padding:13px 20px;border-radius:999px;color:#fff;font-weight:700;background:linear-gradient(135deg,#14877c,#2fb3a6);box-shadow:0 10px 30px rgba(20,135,124,.45);transition:transform .15s}
.ai-fab:hover{transform:translateY(-2px)}
.ai-fab svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.ai-fab.hide{display:none}
.ai-panel{position:fixed;left:18px;bottom:18px;z-index:50;width:min(400px,calc(100vw - 24px));height:min(600px,calc(100vh - 40px));display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:24px;box-shadow:0 24px 70px rgba(0,0,0,.28);overflow:hidden}
.ai-panel[hidden]{display:none}
.ai-head{display:flex;align-items:center;gap:8px;padding:14px 16px;background:linear-gradient(135deg,#14877c,#0d5f58);color:#fff}
.ai-title{flex:1}.ai-title b{display:block}.ai-title small{opacity:.85}
.ai-ic{padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.18);color:#fff;font-size:.82rem;font-weight:600}
.ai-ic:hover{background:rgba(255,255,255,.3)}
.ai-msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.ai-msg{max-width:92%;padding:10px 14px;border-radius:18px;font-size:.95rem;line-height:1.55}
.ai-msg.bot{background:var(--paper);border:1px solid var(--line);border-end-start-radius:6px;align-self:flex-start}
.ai-msg.user{background:var(--brand);color:#fff;border-end-end-radius:6px;align-self:flex-end}
.ai-msg.typing{opacity:.7;font-style:italic}
.ai-text{white-space:pre-wrap}
.ai-note{margin-top:6px;font-size:.78rem;color:var(--muted)}
.ai-src{margin-top:8px;font-size:.85rem;display:flex;flex-wrap:wrap;gap:4px 10px}
.ai-chips{display:flex;flex-direction:column;gap:6px}
.ai-chip{text-align:right;padding:9px 14px;border-radius:14px;background:var(--paper);border:1px solid var(--line);font-size:.9rem}
.ai-chip:hover{border-color:var(--brand);background:var(--brand-soft)}
.ai-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line);background:var(--paper)}
.ai-form input{flex:1;font:inherit;padding:11px 14px;border:2px solid var(--line);border-radius:999px;background:var(--bg);color:var(--ink);min-width:0}
.ai-form input:focus{border-color:var(--brand);outline:none}
.ai-send{padding:0 18px;border-radius:999px;background:var(--sun);color:#3a2600;font-weight:700}
.ai-foot{padding:6px 14px 10px;font-size:.74rem;color:var(--muted);background:var(--paper)}
@media (max-width:640px){
  .ai-fab span{display:none}.ai-fab{padding:14px}
  .ai-panel{inset:0;width:100%;height:100%;max-height:none;border-radius:0}
}
.hist{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px}
.hist a{flex:none;display:flex;flex-direction:column;gap:2px;padding:12px 16px;border-radius:16px;background:var(--paper);border:1px solid var(--line);text-decoration:none;color:var(--ink);min-width:170px}
.hist a b{font-size:.95rem}.hist a span{font-size:.82rem;color:var(--muted)}
.hist a:hover{border-color:var(--brand)}
.linkbtn.small{font-size:.85rem;color:var(--muted);font-weight:500}

[data-theme="dark"]{--bg:#12161a;--paper:#1a2025;--ink:#eef2f4;--muted:#a3afb6;--line:#2c353b;--brand:#3cb3a5;--brand2:#7fded2;--brand-soft:#1c2c2e;--sun:#ffc24d;--sun-soft:#2e2815;--ok:#6fd49d;--ok-soft:#173226;--maybe:#f3c46b;--maybe-soft:#33290f;--shadow:0 1px 2px rgba(0,0,0,.25),0 8px 24px rgba(0,0,0,.25);--shadow-lg:0 16px 44px rgba(0,0,0,.4)}
[data-theme="dark"] body{color-scheme:dark}
[data-theme="dark"] .bar{background:rgba(18,22,26,.85)}
[data-theme="dark"] .hero{background:radial-gradient(600px 300px at 85% -10%,rgba(255,194,77,.07) 0,transparent 70%),radial-gradient(600px 340px at 5% 100%,rgba(60,179,165,.08) 0,transparent 70%)}
[data-theme="dark"] .hero h1 em{background:none;color:var(--brand2)}
[data-theme="dark"] .blob.b1{background:linear-gradient(135deg,#1f3a3a,#192b2d)}[data-theme="dark"] .blob.b2{background:linear-gradient(135deg,#4a3d1a,#2e2815)}
[data-theme="dark"] .choice:hover{background:#202a30}
[data-theme="dark"] .answer{background:var(--paper);border-color:var(--line)}
[data-theme="dark"] .fine{color:#d9cfae}
[data-theme="dark"] .navbtn,[data-theme="dark"] .snav a.navbtn,[data-theme="dark"] .tchip.active{background:#eef2f4;color:#12161a}
[data-theme="dark"] .tchip.active .ic{color:#12161a}
[data-theme="dark"] .lead,[data-theme="dark"] .cta-band{background:#0d1114}
[data-theme="dark"] .btn.sun,[data-theme="dark"] .ai-send{color:#2a1c00}
[data-theme="dark"] .cres{color:#f6ead0}
[data-theme="dark"] .art p,[data-theme="dark"] .art li{color:#d3dce0}
[data-theme="dark"] .fld input{background:#20282d;color:var(--ink)}
[data-theme="dark"] .rsum{background:linear-gradient(135deg,#1d6f66,#154741 70%)}