:root{
  --bg:#eef1fb;--bg2:#f7f8ff;--surface:#ffffff;--surface-2:#f3f4fb;
  --text:#1c2138;--muted:#6b7290;--border:#e3e6f3;
  --accent:#6366f1;--accent-2:#8b5cf6;--accent-soft:#eef0ff;
  --gold:#f4c14b;--success:#22b07d;--warn:#e8833a;
  --shadow:0 10px 30px rgba(76,84,168,0.10);
  --shadow-sm:0 4px 14px rgba(76,84,168,0.08);
  --radius:16px;--radius-sm:10px;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,'PingFang SC','Microsoft YaHei',sans-serif;
  --maxw:1080px;
}
[data-theme="dark"]{
  --bg:#0d0f1a;--bg2:#11142430;--surface:#161a2c;--surface-2:#1c2138;
  --text:#e9ebf6;--muted:#9aa1c0;--border:#272d47;
  --accent:#818cf8;--accent-2:#a78bfa;--accent-soft:#1d2240;
  --gold:#f4c14b;--success:#34d399;--warn:#f59e5b;
  --shadow:0 10px 30px rgba(0,0,0,0.45);
  --shadow-sm:0 4px 14px rgba(0,0,0,0.35);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:
  radial-gradient(1200px 600px at 80% -10%, rgba(139,92,246,0.16), transparent 60%),
  radial-gradient(1000px 500px at -10% 10%, rgba(99,102,241,0.14), transparent 55%),
  var(--bg);
  color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(160%) blur(12px);
  background:color-mix(in srgb, var(--surface) 78%, transparent);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.5px}
.logo .moon{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-size:18px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:var(--shadow-sm)}
.logo span{color:var(--accent)}
.nav-links{display:flex;gap:4px;margin-left:8px}
.nav-links a{font-size:14px;color:var(--muted);padding:8px 12px;border-radius:10px;font-weight:600;transition:.15s}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.nav-spacer{flex:1}
.btn{font-family:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);
  color:var(--text);padding:8px 12px;border-radius:10px;font-size:13px;font-weight:600;transition:.15s}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.lang{min-width:78px}
.btn.icon{padding:8px 10px;font-size:15px}
/* Hero */
.hero{padding:54px 0 30px;text-align:center;position:relative}
.hero-stars{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-stars i{position:absolute;width:3px;height:3px;border-radius:50%;background:#fff;opacity:.7;
  box-shadow:0 0 8px #fff;animation:tw 3s infinite ease-in-out}
@keyframes tw{0%,100%{opacity:.25;transform:scale(.7)}50%{opacity:.9;transform:scale(1.1)}}
.hero .moon-big{font-size:54px;filter:drop-shadow(0 6px 18px rgba(139,92,246,.4));margin-bottom:10px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.1;letter-spacing:-1px;font-weight:800;margin-bottom:14px}
.hero h1 .grad{background:linear-gradient(120deg,var(--accent),var(--accent-2),var(--gold));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:17px;color:var(--muted);max-width:620px;margin:0 auto 22px}
.hero-cta{display:inline-flex;gap:12px;flex-wrap:wrap;justify-content:center}
.cta-primary{background:linear-gradient(120deg,var(--accent),var(--accent-2));color:#fff;border:none;
  padding:13px 26px;border-radius:12px;font-weight:700;font-size:15px;cursor:pointer;box-shadow:var(--shadow);
  transition:.18s}
.cta-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(99,102,241,.35)}
.cta-ghost{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:13px 22px;
  border-radius:12px;font-weight:700;font-size:15px;cursor:pointer;transition:.18s}
.cta-ghost:hover{border-color:var(--accent);color:var(--accent)}
.trust{margin:18px auto 0;max-width:600px;font-size:13px;color:var(--muted);
  display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.trust span{display:inline-flex;gap:5px;align-items:center}
/* Section */
.section{padding:38px 0}
.section-head{text-align:center;margin-bottom:26px}
.section-head h2{font-size:clamp(24px,3.4vw,32px);font-weight:800;letter-spacing:-.6px}
.section-head p{color:var(--muted);margin-top:8px;font-size:15px}
/* Tools */
.tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}
.tab{padding:10px 18px;border-radius:999px;border:1px solid var(--border);background:var(--surface);
  font-weight:700;font-size:14px;color:var(--muted);cursor:pointer;transition:.15s;display:flex;gap:8px;align-items:center}
.tab:hover{color:var(--text)}
.tab.active{background:linear-gradient(120deg,var(--accent),var(--accent-2));color:#fff;border-color:transparent;
  box-shadow:var(--shadow-sm)}
.panel{display:none;animation:fade .25s ease}
.panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:28px;max-width:760px;margin:0 auto}
.card h2{font-size:22px;font-weight:800;letter-spacing:-.4px;margin-bottom:6px}
.card h3{font-size:22px;font-weight:800;letter-spacing:-.4px;margin-bottom:6px}
.card .desc{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}
.field input[type=time],.field select,.field input[type=number]{width:100%;padding:13px 14px;border-radius:12px;
  border:1px solid var(--border);background:var(--surface-2);color:var(--text);font-size:16px;font-family:inherit;
  transition:.15s}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);
  box-shadow:0 0 0 4px var(--accent-soft)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.results{margin-top:8px}
.res-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;
  border:1px solid var(--border);border-radius:12px;background:var(--surface-2);margin-bottom:10px;transition:.15s}
.res-row:hover{border-color:var(--accent)}
.res-time{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--accent)}
.res-meta{text-align:right;font-size:13px;color:var(--muted)}
.res-meta b{color:var(--text)}
.pill{display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);margin-left:6px}
.res-note{font-size:12.5px;color:var(--muted);margin-top:4px}
.big-stat{text-align:center;padding:24px;border-radius:var(--radius);background:linear-gradient(135deg,var(--accent-soft),transparent);margin-top:6px}
.big-stat .num{font-size:40px;font-weight:800;background:linear-gradient(120deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.big-stat .lbl{color:var(--muted);font-size:14px;margin-top:4px}
.q-badge{display:inline-block;padding:4px 12px;border-radius:999px;font-weight:800;font-size:13px}
.win-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.win-row{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:var(--surface-2);flex-wrap:wrap;transition:.15s}
.win-row.rec{border-color:#22b07d;background:linear-gradient(135deg,rgba(34,176,125,.10),var(--surface-2))}
.win-row.best{border-color:var(--accent)}
.win-cyc{font-size:20px;font-weight:800;color:var(--accent);min-width:48px;font-variant-numeric:tabular-nums;text-align:center}
.win-cyc small{display:block;font-size:10px;font-weight:600;color:var(--muted)}
.win-time{font-size:16px;font-weight:700;color:var(--text);flex:1;min-width:160px;font-variant-numeric:tabular-nums}
.win-dur{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.win-tag{font-size:11px;font-weight:800;padding:3px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.win-tag.best{background:var(--accent);color:#fff}
.q-great{background:#d8f5e6;color:#138a5e}.q-good{background:#dcf0ff;color:#1d6fb8}
.q-fair{background:#fff1d6;color:#b87d1a}.q-bad{background:#ffe0e0;color:#c0392b}
/* Science */
.sci-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.sci-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow-sm)}
.sci-card .ico{font-size:30px;margin-bottom:10px}
.sci-card h4{font-size:16px;font-weight:800;margin-bottom:6px}
.sci-card p{font-size:13.5px;color:var(--muted)}
.sci-prose{max-width:760px;margin:22px auto 0;color:var(--muted);font-size:15px}
.sci-prose b{color:var(--text)}
/* Tips */
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tip{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow-sm);transition:.18s}
.tip:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.tip .ico{font-size:26px;margin-bottom:10px}
.tip h4{font-size:16px;font-weight:800;margin-bottom:6px}
.tip p{font-size:13.5px;color:var(--muted)}
/* FAQ */
.faq{max-width:780px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:12px;background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:18px 20px;cursor:pointer;
  font-weight:700;font-size:15.5px}
.faq-q .chev{transition:.2s;color:var(--accent);font-size:18px}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;color:var(--muted);font-size:14.5px}
.faq-a div{padding:0 20px 18px}
/* Affiliate */
.aff-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.aff-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;
  box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:.18s}
.aff-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.aff-card .emoji{font-size:30px;margin-bottom:10px}
.aff-card h4{font-size:16px;font-weight:800;margin-bottom:6px}
.aff-card p{font-size:13.5px;color:var(--muted);flex:1}
.aff-card .buy{margin-top:14px;display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-weight:700;font-size:14px}
.aff-note{text-align:center;color:var(--muted);font-size:12.5px;margin-top:16px}
/* Ad slots are now injected automatically by Google AdSense Auto Ads (see <head> snippet). */
/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:30px;padding:34px 0}
.foot-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot-grid .col h5{font-size:14px;font-weight:800;margin-bottom:10px}
.foot-grid .col a{display:block;color:var(--muted);font-size:13.5px;padding:3px 0}
.foot-grid .col a:hover{color:var(--accent)}
.disclaimer{color:var(--muted);font-size:12.5px;margin-top:22px;line-height:1.7;border-top:1px solid var(--border);padding-top:18px}
.lang-foot{display:flex;gap:8px;margin-top:10px}
.lang-foot button{font-family:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface-2);
  color:var(--muted);padding:6px 14px;border-radius:8px;font-weight:700;font-size:13px}
.lang-foot button.active{background:var(--accent);color:#fff;border-color:transparent}
@media(max-width:860px){
  .sci-grid,.tips-grid,.aff-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media(max-width:560px){
  .sci-grid,.tips-grid,.aff-grid,.grid2{grid-template-columns:1fr}
  .hero{padding:36px 0 18px}
}
/* Log & trend */
.log-cols{margin-top:6px;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.log-head,.log-row{display:grid;grid-template-columns:1.1fr 1fr 1fr 1fr;gap:8px;padding:8px 12px;align-items:center}
.log-head{background:var(--surface-2);font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.6px}
.log-row{border-top:1px solid var(--border)}
.log-row input,.log-row select{width:100%;padding:9px 8px;border-radius:8px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);font-size:13.5px;font-family:inherit}
.log-row input:focus,.log-row select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.log-legend{display:flex;gap:16px;margin-top:12px;font-size:12.5px;color:var(--muted);align-items:center;flex-wrap:wrap}
.log-legend span{display:inline-flex;gap:6px;align-items:center}
.log-legend i{width:12px;height:12px;border-radius:3px;display:inline-block}
.log-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.sum-card{text-align:center;padding:16px 8px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border)}
.sum-card .num{font-size:24px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}
.sum-card .lbl{font-size:12.5px;color:var(--muted);margin-top:4px}
@media(max-width:560px){.log-head,.log-row{grid-template-columns:1fr 1fr}.log-summary{grid-template-columns:1fr 1fr}}
/* Landing-page prose */
.prose{max-width:760px;margin:0 auto;color:var(--muted);font-size:15.5px}
.prose h2{font-size:clamp(22px,3vw,28px);font-weight:800;letter-spacing:-.5px;margin:30px 0 12px;color:var(--text)}
.prose h3{font-size:18px;font-weight:800;margin:22px 0 8px;color:var(--text)}
.prose p{margin-bottom:14px}
.prose b{color:var(--text)}
.prose ul{margin:0 0 14px 20px}
.prose li{margin-bottom:6px}
.prose a{color:var(--accent);font-weight:600}
/* ===== Breathing timer ===== */
.breath-stage{display:flex;flex-direction:column;align-items:center;gap:20px;margin:14px 0 6px}
.breath-ring{position:relative;width:290px;height:290px;display:flex;align-items:center;justify-content:center}
.breath-circle{width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #7dd3fc, #6366f1 70%);
  box-shadow:0 0 0 0 rgba(99,102,241,.35), 0 12px 40px rgba(99,102,241,.30);
  transform:scale(.675);will-change:transform}
.breath-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;pointer-events:none}
.breath-phase{font-size:13.5px;font-weight:600;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;margin-bottom:2px}
.breath-count{font-size:40px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;color:var(--accent,#6366f1)}
.breath-clock{font-size:25px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text);opacity:.82}
.breath-ctrls{display:flex;gap:10px;justify-content:center}
.breath-btns{display:flex;gap:10px}
/* segmented control (rhythm + duration) */
.seg{display:inline-flex;border:1px solid var(--border);border-radius:10px;overflow:hidden}
.seg button{background:transparent;border:0;color:var(--muted);padding:8px 13px;font-size:13.5px;font-weight:600;cursor:pointer;white-space:nowrap;font-family:inherit}
.seg button.active{background:var(--accent,#6366f1);color:#fff}
.btn-primary{background:var(--accent,#6366f1);color:#fff;border:0;border-radius:10px;padding:10px 20px;font-size:14px;font-weight:700;cursor:pointer;transition:.15s;font-family:inherit}
.btn-primary:hover{filter:brightness(1.06)}
.btn-primary:disabled{opacity:.55;cursor:default}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 20px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;font-family:inherit}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.chk{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);cursor:pointer}
.chk input{width:16px;height:16px;accent-color:var(--accent,#6366f1)}
.hint{font-size:12.5px;color:var(--muted);text-align:center;max-width:480px;margin:2px auto 0;line-height:1.55}
/* custom rhythm — horizontal, clearly labeled holds */
.custom-grid{display:flex;flex-wrap:wrap;gap:12px 18px;justify-content:center;align-items:flex-end;max-width:560px;margin:2px auto 0}
.cp-cell{display:flex;flex-direction:column;align-items:center;gap:5px}
.cp-lab{font-size:11px;font-weight:600;color:var(--muted);text-align:center;line-height:1.25;min-height:26px;max-width:88px}
#customPatternField .cp-cell input{width:60px;padding:9px 6px;border:1px solid var(--border);border-radius:9px;background:var(--surface-2);color:var(--text);font-size:15px;text-align:center;font-family:inherit}
#customPatternField .cp-cell input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
/* custom duration — inline inside the dur seg, same size as buttons */
.seg input.seg-input{width:62px;padding:8px 10px;margin:0;border:0;border-left:1px solid var(--border);background:var(--surface-2);color:var(--text);font-size:13.5px;font-weight:600;font-family:inherit;text-align:center;font-variant-numeric:tabular-nums}
.seg input.seg-input:focus{outline:none;box-shadow:inset 0 0 0 2px var(--accent-soft)}
.seg .seg-unit{font-size:13.5px;font-weight:600;color:var(--muted);padding:8px 12px 8px 8px;background:var(--surface-2);white-space:nowrap}
:root[data-theme="dark"] .breath-circle{background:radial-gradient(circle at 35% 30%, #38bdf8, #4f46e5 70%)}

/* ===== Home views (Guide / Calculator toggle) ===== */
.views .view{display:none;}
.views .view.active{display:block;}

/* ===== Sleep Checklist (guide view) ===== */
.bedwrap{max-width:760px;margin:0 auto;}
.planner-bar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:18px 0 6px;}
.planner-bar .field{display:flex;align-items:center;gap:8px;margin:0;}
.planner-bar label{font-size:13px;color:var(--muted);}
.planner-bar input[type=time]{padding:7px 9px;border:0.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:14px;}
.nowbadge{display:inline-block;font-size:13px;font-weight:500;padding:7px 13px;border-radius:999px;background:var(--surface);border:0.5px solid var(--border);color:var(--text);}
.nowbadge b{color:var(--accent);}
.progress{font-size:13px;color:var(--muted);margin:4px 0 0;}
.phase{margin-top:18px;border:0.5px solid var(--border);border-radius:14px;overflow:hidden;background:var(--surface);}
.phase.active{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 22%,transparent);}
.phase-head{display:flex;align-items:center;gap:10px;padding:13px 16px;border-bottom:0.5px solid var(--border);}
.phase-head .pic{font-size:18px;width:26px;text-align:center;}
.phase-head .pt{font-weight:500;font-size:14.5px;color:var(--text);}
.phase-head .pw{margin-left:auto;font-size:12px;color:var(--muted);}
.items{padding:6px 16px 12px;}
.item{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:0.5px solid var(--border);cursor:pointer;}
.item:last-child{border-bottom:0;}
.item input{margin-top:3px;width:17px;height:17px;accent-color:var(--accent);cursor:pointer;flex-shrink:0;}
.item .ib{flex:1;}
.item .it{font-size:13px;color:var(--muted);font-weight:500;letter-spacing:.2px;}
.item .ix{font-size:13.5px;color:var(--text);line-height:1.5;margin-top:2px;}
.item .why{font-size:11.5px;color:var(--muted);margin-top:5px;line-height:1.55;opacity:.82;border-left:2px solid var(--border);padding-left:9px;}
.item .ideep{display:inline-block;margin-top:6px;font-size:12.5px;color:var(--accent);text-decoration:none;}
.item.done .ix{color:var(--muted);text-decoration:line-through;opacity:.7;}