:root{
  --bg:#fdfcf9;
  --surface:#ffffff;
  --ink:#2c3530;
  --muted:#6f7b74;
  --line:#e8e4dc;
  --sage:#78A98A;
  --sage-deep:#4f7f63;
  --blush:#deb6b6;
  --blush-deep:#c08888;
  --gold:#c9a86a;
  --serif:"Libre Baskerville",Georgia,serif;
  --sans:"Figtree",system-ui,-apple-system,sans-serif;
  --radius:18px;
  --shadow:0 18px 48px rgba(60,72,64,.10);
  --pad:clamp(20px,4vw,44px);
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  font-size:16px;
  overflow-x:hidden;
}
a{color:inherit}
img{max-width:100%;display:block}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--sage-deep);
  color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:50;
}
.skip-link:focus{left:0;top:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:30;background:rgba(253,252,249,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo{width:38px;height:38px}
.brand-name{font-family:var(--serif);font-size:21px;font-weight:700;letter-spacing:-.2px}
.brand-name span{color:var(--sage-deep)}
.site-nav ul{display:flex;align-items:center;gap:6px;list-style:none}
.site-nav a{display:inline-block;padding:9px 14px;border-radius:999px;text-decoration:none;font-weight:600;font-size:15px;color:var(--muted);transition:background .2s,color .2s}
.site-nav a:hover{background:var(--line);color:var(--ink)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:999px;padding:9px 16px;font:600 15px var(--sans);color:var(--ink);cursor:pointer}
@media(max-width:720px){
  .site-nav .menu-btn{display:inline-block}
  .site-nav ul{gap:2px}
  .site-nav:has(.menu-btn) ul{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--line);border-top:1px solid var(--line);padding:12px var(--pad)}
  .site-nav.open:has(.menu-btn) ul{display:flex}
  .site-nav a{padding:13px 14px;font-size:16px}
  .site-nav:has(.menu-btn) a::before{content:"· ";color:var(--sage)}
}

/* ---------- hero ---------- */
.hero{padding:64px 0 12px;text-align:center}
.eyebrow{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--sage-deep);margin-bottom:12px}
.hero h1{font-family:var(--serif);font-size:clamp(34px,5vw,54px);line-height:1.12;letter-spacing:-1px;margin-bottom:16px}
.hero .lede{max-width:620px;margin:0 auto;color:var(--muted);font-size:18px}
@media(max-width:720px){.hero{padding:40px 0 8px}}

/* ---------- tool ---------- */
.tool{margin-top:34px}
.tabs{display:flex;gap:6px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:7px;margin-bottom:22px}
.tab{border:0;background:transparent;font:600 15px var(--sans);color:var(--muted);padding:11px 20px;border-radius:12px;cursor:pointer;transition:.2s}
.tab:hover{color:var(--ink)}
.tab.active{background:var(--sage);color:#fff}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,4vw,40px);box-shadow:var(--shadow)}
.mode-panel{animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.input-field{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
.input-field label{font-weight:700;font-size:15px}
.date-input,.select,.input-suffix input,.us-week{
  width:100%;font:500 17px var(--sans);color:var(--ink);
  background:var(--bg);border:1px solid var(--line);border-radius:12px;
  padding:14px 15px;outline:none;transition:.2s;
}
.date-input:focus,.select:focus,.input-suffix input:focus{border-color:var(--sage);box-shadow:0 0 0 4px rgba(120,169,138,.16)}
.input-suffix{position:relative;display:flex;align-items:center}
.input-suffix input{padding-right:52px;width:100%}
.suffix{position:absolute;right:14px;font-weight:600;color:var(--muted)}
.fields-grid{display:grid;gap:14px}
.fields-grid.two{grid-template-columns:1fr 1fr}
.fields-grid.three{grid-template-columns:1.4fr 1fr 1fr}
@media(max-width:640px){
  .fields-grid.two,.fields-grid.three{grid-template-columns:1fr}
}
.field-hint{color:var(--muted);font-size:13.5px;margin-top:4px}
.btn-row{margin-top:20px}
.btn-primary{
  width:100%;border:0;cursor:pointer;font:700 16px var(--sans);
  background:linear-gradient(135deg,var(--sage),var(--sage-deep));
  color:#fff;padding:16px 22px;border-radius:13px;transition:.2s;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(79,127,99,.28)}
.btn-primary:active{transform:none}
.error-msg{color:#b54545;font-weight:600;font-size:14.5px;margin-top:14px;min-height:1.2em}

/* ---------- results ---------- */
.results{margin-top:30px;animation:rise .45s ease}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.r-head{display:flex;flex-direction:column;align-items:center;padding:10px 0 4px;border-bottom:1px dashed var(--line)}
.r-head h2{font-family:var(--serif);font-size:clamp(30px,5vw,44px);color:var(--sage-deep);letter-spacing:-.5px}
.r-head-sub{color:var(--muted);font-weight:600}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:20px 14px;text-align:center}
.stat-num{display:block;font-family:var(--serif);font-size:27px;font-weight:700;color:var(--ink)}
.stat-name{color:var(--muted);font-size:13px;font-weight:600}
@media(max-width:600px){.stat-grid{grid-template-columns:1fr}}

.progress{height:12px;background:var(--line);border-radius:99px;margin-top:24px;overflow:hidden}
.progress-bar{height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--sage),var(--blush));transition:width .8s cubic-bezier(.3,1,.4,1)}

.fetal-block{background:linear-gradient(135deg,#f4f7f2,#faf4ef);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-top:26px}
.fetal-head{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:space-between}
.fetal-head h3{font-family:var(--serif);font-size:22px}
.fetal-size{text-align:left}
.fetal-size .k{display:block;font-size:12px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.fetal-size .v{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--sage-deep)}
.fetal-note{margin-top:14px;color:var(--ink);font-size:15.5px}

.checks{margin-top:26px}
.checks h3,.card-block h3{font-family:var(--serif);font-size:22px;margin-bottom:14px}
#check-list{list-style:none;display:flex;flex-direction:column;gap:10px}
#check-list li{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 18px}
#check-list .w{flex:0 0 92px;font-weight:800;color:var(--sage-deep);font-size:15px}
#check-list .c b{display:block;font-weight:700}
#check-list .c span{color:var(--muted);font-size:14px}

.card-block{margin-top:30px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.btn-ghost{border:1px solid var(--sage);background:#fff;color:var(--sage-deep);font:700 15px var(--sans);padding:11px 18px;border-radius:11px;cursor:pointer;transition:.2s}
.btn-ghost:hover{background:var(--sage);color:#fff}
.card-stage{display:flex;justify-content:center;margin-top:16px}
#card-canvas{width:min(100%,420px);height:auto;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.disclaimer-micro{margin-top:22px;color:var(--muted);font-size:12.5px;border-top:1px dashed var(--line);padding-top:16px}
@media(max-width:600px){.r-head h2{font-size:28px}.stat-num{font-size:23px}}

/* ---------- why ---------- */
.why{margin-top:70px}
.why-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:center}
.why h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);line-height:1.2;margin-bottom:14px}
.why-copy>p{color:var(--muted);font-size:16.5px}
.why-steps{list-style:none;counter-reset:w;display:flex;flex-direction:column;gap:0}
.why-steps li{counter-increment:w;position:relative;padding:16px 0 16px 60px;border-bottom:1px solid var(--line)}
.why-steps li::before{content:counter(w,decimal-leading-zero);position:absolute;left:4px;top:22px;font-family:var(--serif);font-size:26px;color:var(--blush-deep);font-weight:700}
.why-steps li strong{display:block;font-size:16.5px}
.why-steps li{color:var(--muted)}
@media(max-width:820px){.why-grid{grid-template-columns:1fr;gap:24px}}

/* ---------- FAQ ---------- */
.faq{margin-top:70px}
.faq h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);margin-bottom:20px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;font-size:16.5px;position:relative;padding-right:44px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:14px;font-size:22px;color:var(--sage-deep);transition:.2s}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 22px 18px;color:var(--muted)}

/* ---------- articles teaser ---------- */
.articles-teaser{margin-top:70px}
.teaser-head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:18px}
.teaser-head h2{font-family:var(--serif);font-size:clamp(24px,3.2vw,34px)}
.text-link{color:var(--sage-deep);font-weight:700;text-decoration:none}
.text-link:hover{text-decoration:underline}
.teaser-card a{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:14px;transition:.2s}
.teaser-card a:hover{border-color:var(--sage);transform:translateY(-3px);box-shadow:var(--shadow)}
.teaser-card h3{font-family:var(--serif);font-size:19px;margin-bottom:6px}
.teaser-card p{color:var(--muted);font-size:15px}

/* ---------- pages ---------- */
.page{padding:56px 0}
.page-narrow{max-width:820px}
.page h1{font-family:var(--serif);font-size:clamp(28px,4vw,42px);line-height:1.15;margin-bottom:18px}
.article-meta{display:flex;gap:16px;color:var(--muted);font-size:13.5px;font-weight:600;margin-bottom:26px}
.article-meta span+span::before{content:"·";margin-right:16px}
.article-body p{margin-bottom:16px;color:#3b443e;font-size:16.5px}
.article-body h2{font-family:var(--serif);font-size:24px;margin:30px 0 12px}
.article-body h3{font-family:var(--serif);font-size:19px;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px 22px}
.article-body li{margin-bottom:8px;color:#3b443e}
.article-body blockquote{border-left:4px solid var(--sage);padding:4px 0 4px 18px;color:var(--muted);font-family:var(--serif);font-style:italic;margin:20px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;font-size:15px}
.article-body th{background:var(--bg)}

/* ---------- guide list ---------- */
.guide-list{display:grid;grid-template-columns:1fr;gap:14px;margin-top:8px}
.guide-card{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;transition:.2s}
.guide-card:hover{border-color:var(--sage);box-shadow:var(--shadow)}
.guide-card h3{font-family:var(--serif);font-size:19px;margin-bottom:6px}
.guide-card p{color:var(--muted);font-size:15px}

/* ---------- footer ---------- */
.site-foot{margin-top:80px;border-top:1px solid var(--line);background:#f6f4ee;padding:40px 0 30px}
.foot-grid{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.foot-brand{font-weight:700;color:var(--ink)}
.site-foot nav ul{display:flex;gap:18px;list-style:none;flex-wrap:wrap}
.site-foot nav a{text-decoration:none;color:var(--muted);font-size:14.5px;font-weight:600}
.site-foot nav a:hover{color:var(--sage-deep)}
.foot-legal{margin-top:18px;color:var(--muted);font-size:13px;border-top:1px dashed var(--line);padding-top:18px}
@media(max-width:600px){.foot-grid{flex-direction:column;align-items:flex-start}}

/* ---------- cookie banner ---------- */
.cookie-banner{position:fixed;left:0;right:0;bottom:0;background:#2c3530;color:#f4f3ee;padding:16px var(--pad);display:none;justify-content:center;gap:14px;align-items:center;flex-wrap:wrap;z-index:60;font-size:14.5px}
.cookie-banner p{max-width:820px}
.cookie-banner button{border:1px solid rgba(255,255,255,.4);background:transparent;color:#fff;padding:7px 16px;border-radius:999px;cursor:pointer;font:600 14px var(--sans);margin-left:8px}
.cookie-banner button:hover{background:#fff;color:#2c3530}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}