:root{
  --bg:#fbf7f1;
  --surface:#fffdfa;
  --ink:#2c2421;
  --muted:#8a7e77;
  --line:#ece2d8;
  --period:#d97b84;
  --fertile:#4a9d84;
  --peak:#e8a05a;
  --good:#3e8e5a;
  --display:"Cormorant Garamond","Songti SC",serif;
  --sans:"Mulish",system-ui,sans-serif;
  --pad:clamp(18px,4vw,44px);
  --radius:20px;
  --shadow:0 16px 40px rgba(44,36,33,.10);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:400;line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.08;margin:0 0 .4em;letter-spacing:-.005em}
h1{font-size:clamp(2.2rem,6vw,3.6rem)}
h2{font-size:1.9rem}
h3{font-size:1.3rem}
p{margin:0 0 1em}
a{color:var(--fertile)}
a:hover{text-decoration:none}
.tool-hero{position:relative;overflow:hidden}
.tool-hero:after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(50% 60% at 85% 0%,rgba(228,160,90,.14),transparent 60%),radial-gradient(45% 55% at 8% 100%,rgba(74,157,132,.12),transparent 60%)}
.wrap{max-width:1180px;margin:0 auto;padding:0 var(--pad)}
/* Header */
.site-head{position:sticky;top:0;z-index:50;background:rgba(251,247,241,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.brand .logo{width:38px;height:38px;display:block;border-radius:2px}
.brand-name{font-family:var(--display);font-weight:600;font-size:1.45rem}
.brand-name em{font-style:normal;color:var(--period)}
.site-nav ul{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.site-nav a{display:inline-block;padding:9px 15px;border-radius:999px;text-decoration:none;color:var(--ink);font-weight:600;font-size:.93rem}
.site-nav a:hover{background:var(--surface);color:var(--period)}
/* Hero header */
.tool-hd{position:relative;padding-top:44px;padding-bottom:8px;max-width:760px}
.tool-hd h1{margin-bottom:.15em}
.tool-hd p{color:var(--muted);font-size:1.08rem}
.eyebrow{display:inline-block;font-weight:700;font-size:.76rem;letter-spacing:.2em;text-transform:uppercase;color:var(--fertile);margin-bottom:.7em}
/* Layout */
.grid2{display:grid;grid-template-columns:minmax(0,42%) minmax(0,1fr);gap:20px;align-items:start}
@media(max-width:960px){.grid2{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.panel h4{font-family:var(--display);font-size:1.25rem;font-weight:600;margin:0 0 .25em}
.panel .sub{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.field{margin-bottom:16px}
.field>label{display:block;font-weight:600;font-size:.88rem;margin-bottom:7px}
input[type=date],select,input[type=number]{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);
  font-family:var(--sans);font-size:1rem;appearance:none;transition:.15s
}
input:focus,select:focus{outline:none;border-color:var(--fertile);box-shadow:0 0 0 3px rgba(74,157,132,.14)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.row2{grid-template-columns:1fr}}
/* Segmented */
.seg{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.seg input{position:absolute;opacity:0}
.seg label{display:flex;align-items:center;justify-content:center;padding:12px 10px;border:1.5px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;font-weight:600;font-size:.9rem;transition:.15s}
.seg input:checked+label{border-color:var(--ink);background:var(--ink);color:#fff}
.seg label:hover{border-color:var(--ink)}
/* Results */
.results{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
@media(max-width:760px){.results{grid-template-columns:1fr}}
.r-card{border:1px solid var(--line);border-radius:16px;padding:18px 16px;background:#fff;position:relative;overflow:hidden}
.r-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--ac,#eee)}
.r-card .lab{font-weight:700;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.r-card .big{font-family:var(--display);font-weight:600;font-size:1.5rem;line-height:1.1;margin:.15em 0 .1em}
.r-card .dt{font-size:.82rem;color:var(--muted)}
.r-card.period{--ac:var(--period)}.r-card.fertile{--ac:var(--fertile)}.r-card.peak{--ac:var(--peak)}
.highlight{background:#f2f8f4;border:1px solid rgba(74,157,132,.3);border-radius:14px;padding:16px 18px;margin-top:16px}
.highlight .t{font-weight:700;color:var(--fertile);margin-bottom:4px}
/* Calendar */
.cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.cal-title{font-family:var(--display);font-weight:600;font-size:1.3rem}
.cal-week{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-dow{text-align:center;font-weight:700;font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);padding:6px 0}
.cal-day{position:relative;aspect-ratio:1;display:flex;align-items:center;justify-content:center;border-radius:12px;background:#fff;border:1px solid var(--line);font-weight:600;font-size:.9rem}
.cal-day.empty{background:transparent;border-color:transparent}
.cal-day.period{background:#fdecef;border-color:var(--period);color:#b04b57}
.cal-day.fertile{background:#eaf6f1;border-color:var(--fertile);color:#337a64}
.cal-day.peak{background:#fdeeda;border-color:var(--peak);color:#b47a2a;box-shadow:0 0 0 2px var(--peak)}
.cal-day.peak b{display:none}
.legend{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;font-size:.82rem;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.dot{width:11px;height:11px;border-radius:50%}
/* BBT table */
.bbt{width:100%;border-collapse:collapse;font-size:.88rem;margin-top:6px}
.bbt th,.bbt td{text-align:center;padding:9px 6px;border:1px solid var(--line)}
.bbt th{background:var(--ink);color:#fff;font-family:var(--display);font-weight:600}
.bbt td input{width:64px;text-align:center;padding:8px;border:1px solid var(--line);border-radius:8px;font-size:.9rem}
.bbt tr.ov td{background:#eaf6f1}
.confirm{background:var(--fertile);color:#fff;border-radius:12px;padding:14px 16px;margin-top:12px;font-weight:600;display:none}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:12px;border:none;background:var(--period);color:#fff;font-family:var(--sans);font-weight:700;font-size:1rem;cursor:pointer;text-decoration:none;min-height:44px;transition:.15s}
.btn:hover{background:#c05f6a}
/* Timing tips */
.tips{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
@media(max-width:820px){.tips{grid-template-columns:1fr}}
.tip{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}
.tip h4{font-family:var(--display);margin-bottom:.4em}
.tip ul{margin:0;padding-left:1.05em}
.tip li{margin-bottom:.45em;font-size:.92rem}
.tip .off{font-size:.82rem;color:var(--muted)}
/* Content / article */
.page{padding:54px 0 66px}
.page-narrow{max-width:800px}
.page-lede{font-size:1.1rem;color:var(--muted);max-width:660px}
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px}
@media(max-width:760px){.article-list{grid-template-columns:1fr}}
.article-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;text-decoration:none;color:var(--ink);transition:.18s;box-shadow:var(--shadow)}
.article-card:hover{border-color:var(--period);transform:translateY(-3px)}
.article-card h2{font-size:1.25rem;margin-bottom:.4em}
.article-card p{color:var(--muted);font-size:.94rem;margin:0}
.article-body h2{margin-top:1.7em}
.article-body ul,.article-body ol{padding-left:1.2em}
.article-body li{margin-bottom:.5em}
table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.92rem}
th,td{text-align:left;padding:11px 13px;border:1px solid var(--line)}
th{background:var(--ink);color:#fff;font-family:var(--display);font-weight:600}
tr:nth-child(even) td{background:#fbf7f1}
.quote{border-left:4px solid var(--fertile);background:var(--surface);border-radius:0 12px 12px 0;padding:16px 20px;margin:1.4em 0;color:var(--muted)}
.article-meta{display:flex;gap:12px;color:var(--muted);font-size:.85rem;margin:0 0 1.6em;flex-wrap:wrap}
.article-meta span{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 12px}
/* Footer */
.site-foot{border-top:1px solid var(--line);background:var(--surface)}
.foot-grid{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding-top:34px;padding-bottom:26px;flex-wrap:wrap}
.foot-brand{font-family:var(--display);font-weight:600;font-size:1.15rem;margin:0}
.site-foot nav ul{display:flex;gap:6px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.site-foot nav a{display:inline-block;padding:7px 11px;border-radius:999px;color:var(--muted);text-decoration:none;font-size:.9rem}
.site-foot nav a:hover{background:var(--bg);color:var(--period)}
.foot-legal{border-top:1px dashed var(--line);padding:16px var(--pad);color:var(--muted);font-size:.82rem;text-align:center}
/* Cookie banner */
.cookie-banner{position:fixed;left:16px;right:16px;bottom:16px;z-index:100;display:none;align-items:center;gap:14px;justify-content:space-between;flex-wrap:wrap;background:var(--ink);color:#fff;border-radius:14px;padding:14px 18px;box-shadow:var(--shadow);max-width:640px;margin:0 auto}
.cookie-banner p{margin:0;font-size:.9rem;flex:1;min-width:220px}
.cookie-banner button{border:none;border-radius:10px;padding:9px 16px;font-family:var(--sans);font-weight:700;font-size:.9rem;cursor:pointer;min-height:40px}
#cookie-accept{background:var(--period);color:#fff}
#cookie-decline{background:transparent;color:#cfc7c2;border:1px solid #444}
/* Responsive menu */
#nav-wrap{display:contents}
.menu-btn{display:none}
@media(max-width:640px){
  .site-nav{position:relative}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border:1.5px solid var(--line);background:var(--surface);border-radius:12px;font-family:var(--sans);font-weight:600;font-size:.95rem;cursor:pointer;color:var(--ink)}
  #nav-menu{display:none;position:absolute;right:0;top:calc(100% + 8px);background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);min-width:200px;z-index:60;padding:8px}
  #nav-menu.open{display:block}
  .site-nav ul{flex-direction:column;gap:0}
  .site-nav a{display:block;border-radius:10px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}