/* CaloriesSnap — Sleep Cycle Calculator styles */
:root{
  --bg:#ffffff; --card:#ffffff; --text:#0f172a; --muted:#5b6474; --muted2:#7a8394;
  --border:rgba(15,23,42,0.10);
  --shadow:0 12px 30px rgba(15,23,42,0.08); --shadow2:0 10px 20px rgba(15,23,42,0.06);
  --brand:#4f46e5; --brand2:#0ea5a3; --brand3:#6366f1;
  --accent:#f97316; --warn:#f59e0b; --danger:#ef4444; --ok:#16a34a;
  --night:#1e1b4b;
  --radius:16px; --radius2:14px; --radius3:12px; --maxw:1120px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(var(--maxw),calc(100% - 32px));margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--brand);color:#fff;padding:10px 14px;border-radius:10px;z-index:3000}
.skip-link:focus{left:12px}
:focus-visible{outline:3px solid rgba(79,70,229,.35);outline-offset:2px}

/* NAV */
.nav{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand:hover{text-decoration:none}
.brand-logo{width:40px;height:40px;border-radius:10px;object-fit:cover}
.brand-wrap{display:flex;flex-direction:column;line-height:1.1}
.brand-text{font-weight:800;font-size:1.08rem;letter-spacing:-.02em}
.brand-health{color:var(--text)}
.brand-calc{color:var(--brand2)}
.brand-wrap small{font-size:11px;color:var(--muted)}
.nav-links{display:none;align-items:center;gap:18px;font-weight:600;font-size:14px}
.nav-links > a,.dropdown > button{color:var(--text);padding:8px 2px}
.dropdown{position:relative}
.dropdown > button{background:none;border:0;font:inherit;font-weight:600;cursor:pointer}
.menu{display:none;position:absolute;top:100%;left:-10px;min-width:270px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:8px}
.menu.open{display:block}
.menu a{display:flex;justify-content:space-between;padding:10px 12px;border-radius:10px;font-size:14px}
.menu a:hover{background:rgba(79,70,229,.07);text-decoration:none}
.menu hr{border:0;border-top:1px solid var(--border);margin:6px 0}
.icon-btn{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--border);background:#fff;font-size:18px;cursor:pointer}
.drawer-overlay{position:fixed;inset:0;background:rgba(15,23,42,.45);display:none;z-index:1500}
.drawer-overlay.open{display:block}
.drawer{position:absolute;top:0;left:0;height:100%;width:min(86vw,360px);background:#fff;padding:14px;overflow-y:auto;transform:translateX(-105%);transition:transform .24s ease}
.drawer-overlay.open .drawer{transform:translateX(0)}
.drawer-head{display:flex;justify-content:space-between;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--border)}
.drawer nav{display:flex;flex-direction:column;gap:4px;padding:12px 0}
.drawer nav a{padding:12px;border-radius:12px;font-weight:600}
.drawer nav a:hover{background:rgba(15,23,42,.05);text-decoration:none}
.accordion{border:1px solid var(--border);border-radius:14px;overflow:hidden}
.accordion > button{width:100%;display:flex;justify-content:space-between;padding:12px;font:inherit;font-weight:600;border:0;background:rgba(15,23,42,.03);cursor:pointer}
.accordion .panel{display:none;padding:6px}
.accordion.open .panel{display:block}

/* HERO */
.hero{padding:22px 0 8px}
.hero-card{background:linear-gradient(135deg,rgba(79,70,229,.08),rgba(14,165,163,.07) 60%,#fff);border:1px solid var(--border);border-radius:22px;padding:20px;box-shadow:var(--shadow2)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--muted);margin-bottom:12px}
.breadcrumb a:hover{color:var(--brand)}
.hero-title{display:flex;gap:14px;align-items:flex-start}
.tool-ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:24px;background:linear-gradient(135deg,var(--night),var(--brand));flex:0 0 auto;box-shadow:0 10px 20px rgba(79,70,229,.25)}
h1{margin:0 0 6px;font-size:28px;letter-spacing:-.02em;line-height:1.15}
.tagline{margin:0;color:var(--muted);font-size:16px;max-width:70ch}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 8px}
.badge{background:#fff;border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:13px}
.updated{font-size:13px;color:var(--muted)}
.meta-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;font-size:13px;color:var(--muted)}
.noscript-note{margin-top:12px;padding:12px;border-radius:12px;background:#fff8eb;border:1px solid #fde2b1}

/* CALCULATOR */
main{padding:14px 0 10px}
.calc-wrapper{display:grid;grid-template-columns:1fr;gap:14px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow2);padding:18px}
.panel h2{margin:0 0 4px;font-size:19px}
.sub{margin:0 0 14px;color:var(--muted);font-size:14px}
.field{margin-bottom:14px}
.field > label,.field-label{display:block;font-weight:700;font-size:14px;margin-bottom:6px}
.hint{font-weight:400;color:var(--muted2);font-size:13px}
.toggle{display:flex;flex-wrap:wrap;gap:6px;background:rgba(15,23,42,.04);border:1px solid var(--border);border-radius:14px;padding:4px}
.toggle button{flex:1 1 auto;min-height:44px;border:0;background:transparent;border-radius:10px;font:inherit;font-weight:700;font-size:14px;color:var(--muted);cursor:pointer;padding:8px 10px}
.toggle button.active{background:#fff;color:var(--brand);box-shadow:var(--shadow2)}
input[type="time"],input[type="number"],select{width:100%;min-height:48px;border:1px solid var(--border);border-radius:var(--radius3);padding:10px 12px;font:inherit;font-size:16px;background:#fff;color:var(--text)}
input:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.18)}
.errline{display:none;color:var(--danger);font-size:13px;margin-top:6px}
.field.invalid .errline{display:block}
.field.invalid input{border-color:var(--danger)}
.row-two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.btn{min-height:46px;border-radius:12px;border:1px solid var(--border);padding:10px 18px;font:inherit;font-weight:700;font-size:15px;cursor:pointer;background:#fff;color:var(--text)}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:0;flex:1}
.btn.primary:hover{filter:brightness(1.05)}
.btn.small{min-height:40px;padding:8px 12px;font-size:14px}
.privacy-note{font-size:12.5px;color:var(--muted);margin:10px 0 0}

/* RESULTS */
.results .empty{text-align:center;padding:30px 10px;color:var(--muted)}
.results .empty .moon{font-size:44px;display:block;margin-bottom:8px}
.res-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.res-head h2{margin:0}
.res-sub{margin:2px 0 0;color:var(--muted);font-size:14px}
.best-card{background:linear-gradient(135deg,var(--night),var(--brand));color:#fff;border-radius:18px;padding:20px;margin:6px 0 14px;box-shadow:0 14px 28px rgba(79,70,229,.25)}
.best-card .lbl{font-size:13px;opacity:.85;text-transform:uppercase;letter-spacing:.05em;font-weight:700}
.best-card .big{font-size:42px;font-weight:800;letter-spacing:-.02em;line-height:1.1;margin:4px 0}
.best-card .meta{font-size:14px;opacity:.9}
.times-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.time-card{border:1px solid var(--border);border-radius:14px;padding:12px;background:#fff;position:relative}
.time-card .t{font-size:22px;font-weight:800;letter-spacing:-.01em}
.time-card .c{font-size:13px;color:var(--muted)}
.time-card .h{font-size:12.5px;font-weight:700;margin-top:4px}
.time-card.ideal{border:2px solid var(--ok);background:rgba(22,163,74,.05)}
.time-card.ok{border-left:4px solid var(--brand2)}
.time-card.short{border-left:4px solid var(--warn)}
.tag{position:absolute;top:8px;right:8px;font-size:10.5px;font-weight:800;padding:3px 7px;border-radius:999px;text-transform:uppercase}
.tag.ideal{background:var(--ok);color:#fff}
.tag.short{background:#fff3d6;color:#9a5b00}
.timeline{margin:16px 0 6px}
.timeline-bar{display:flex;height:26px;border-radius:10px;overflow:hidden;border:1px solid var(--border)}
.timeline-bar span{display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff}
.timeline-bar .fall{background:#94a3b8}
.timeline-bar .cyc:nth-child(odd){background:var(--brand)}
.timeline-bar .cyc:nth-child(even){background:#6d64f0}
.timeline-legend{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:4px}
.interpret{border-radius:14px;padding:14px 16px;margin:14px 0;border-left:5px solid var(--brand2);background:rgba(14,165,163,.06);font-size:14.5px}
.interpret.warn{border-left-color:var(--warn);background:#fff8eb}
.tips{margin:6px 0 0;padding-left:20px;font-size:14.5px}
.tips li{margin-bottom:6px}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--text);color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:2000}
.toast.show{opacity:1}

/* CONTENT */
.section{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:14px 0;box-shadow:var(--shadow2)}
.section h2{margin:0 0 10px;font-size:22px;letter-spacing:-.01em}
.section h3{margin:18px 0 6px;font-size:17px}
.section p,.section li{font-size:15.5px;color:#25313c}
.table-wrap{overflow-x:auto;margin:10px 0}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:460px}
th,td{border:1px solid var(--border);padding:9px 11px;text-align:left}
th{background:rgba(79,70,229,.06)}
.formula{background:#0d1117;color:#c7d2fe;border-radius:12px;padding:14px 16px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;overflow-x:auto;white-space:nowrap;margin:10px 0}
.editorial-note{background:rgba(15,23,42,.03);border:1px solid var(--border);border-radius:12px;padding:12px 14px;font-size:14px;margin-top:12px}
.sources li{font-size:14px}
.related{display:grid;grid-template-columns:1fr;gap:10px}
.toolcard{display:flex;justify-content:space-between;align-items:center;gap:12px;border:1px solid var(--border);border-radius:14px;padding:14px;flex-wrap:wrap}
.toolcard .l{display:flex;gap:12px;align-items:center}
.toolcard .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(79,70,229,.08);font-size:20px}
.toolcard .nm{margin:0;font-weight:800}
.toolcard .ds{margin:2px 0 0;color:var(--muted);font-size:13.5px}
.toolcard .cta{color:var(--brand);font-weight:800;font-size:14px;white-space:nowrap}
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:8px;overflow:hidden}
.faq-q{width:100%;text-align:left;display:flex;justify-content:space-between;gap:10px;align-items:center;padding:14px;background:#fff;border:0;font:inherit;font-weight:700;font-size:15px;cursor:pointer;color:var(--text)}
.faq-arrow{transition:transform .2s}
.faq-q[aria-expanded="true"] .faq-arrow{transform:rotate(180deg)}
.faq-a{padding:0 14px 14px;color:#25313c;font-size:15px}
.learn-more{background:linear-gradient(135deg,rgba(79,70,229,.06),rgba(14,165,163,.05));border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:14px 0}
.learn-kicker{font-size:12px;font-weight:800;color:var(--brand);text-transform:uppercase;letter-spacing:.05em}
.learn-more h2{margin:4px 0 6px;font-size:22px}
.learn-grid{display:grid;grid-template-columns:1fr;gap:10px;margin:12px 0}
.guide-card{display:block;background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px}
.guide-card:hover{text-decoration:none;border-color:rgba(79,70,229,.35)}
.guide-card h3{margin:0 0 4px;font-size:16px}
.guide-card p{margin:0 0 6px;font-size:14px;color:var(--muted)}
.guide-card span{font-weight:800;color:var(--brand);font-size:14px}
.learn-actions{display:flex;gap:10px;flex-wrap:wrap}
.learn-actions a{display:inline-block;padding:11px 16px;border-radius:12px;font-weight:700;font-size:14px}
.learn-actions .p{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.learn-actions .s{background:#fff;border:1px solid var(--border)}
.learn-actions a:hover{text-decoration:none}

/* FOOTER */
footer{margin-top:22px;background:#0b1220;border-top:1px solid rgba(255,255,255,.1)}
.footer-top{padding:34px 0 18px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:20px}
.f-brand .desc{margin:10px 0 0;color:rgba(255,255,255,.7);font-size:13px;max-width:52ch;line-height:1.6}
.footer-brand .brand-health{color:rgba(255,255,255,.95)}
.footer-brand small{color:rgba(255,255,255,.7)}
.f-col h3{margin:0 0 10px;font-size:13px;color:rgba(255,255,255,.92)}
.f-links{display:grid;gap:8px}
.f-links a{color:rgba(255,255,255,.72);font-size:13px}
.f-links a:hover{color:#fff}
.footer-bar{border-top:1px solid rgba(255,255,255,.1);padding:16px 0;color:rgba(255,255,255,.68);font-size:13px}
.bar-inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* STICKY BAR */
.stickybar{position:fixed;left:0;right:0;bottom:0;z-index:1200;background:linear-gradient(135deg,var(--night),var(--brand));color:#fff;display:none;padding-bottom:env(safe-area-inset-bottom)}
.stickybar .container{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0}
.stickybar .tap{border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.14);color:#fff;border-radius:999px;padding:10px 14px;font:inherit;font-weight:700;font-size:14px;min-height:44px;cursor:pointer}
.spacer-bottom{height:0}
#resultsPanel{scroll-margin-top:84px}

@media (min-width:768px){
  .related{grid-template-columns:1fr 1fr}
  .learn-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1024px){
  h1{font-size:34px}
  .nav-links{display:flex}
  .hamburger{display:none}
  .calc-wrapper{grid-template-columns:.95fr 1.35fr;gap:16px}
  .inputs-panel{position:sticky;top:84px;align-self:start}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr 1fr}
}
@media (max-width:767px){
  .breadcrumb{font-size:12px}
  .stickybar.show{display:block}
  .spacer-bottom.show{height:76px}
  .best-card .big{font-size:36px}
}
@media print{
  .nav,.drawer-overlay,footer,.stickybar,.actions,.btn-row,.learn-more,.related,.skip-link{display:none!important}
  .panel,.section{box-shadow:none;border-color:#ccc}
  .best-card{color:#000;background:#fff;border:2px solid #000}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}