/* SleepCaffeine design system — 2026 redesign */
:root{
  --ink:#161320; --ink-2:#403a52; --muted:#6b6680;
  --bg:#fbfaf7; --surface:#ffffff; --line:#ece8f1;
  --brand:#5b54e6; --brand-d:#433dc4; --brand-soft:#eeedfd;
  --accent:#c8862b; --accent-soft:#fbf1e0;
  --night:#0e1430; --night-2:#1b2350;
  --good:#1f9d63; --good-soft:#e6f6ee;
  --radius:16px; --radius-s:10px;
  --shadow:0 1px 2px rgba(22,19,32,.06), 0 8px 24px rgba(22,19,32,.06);
  --shadow-lg:0 2px 4px rgba(22,19,32,.06), 0 18px 48px rgba(22,19,32,.10);
  --maxw:1080px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--brand-d);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em;font-weight:800}
h1{font-size:clamp(2rem,5vw,3.1rem)}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem)}
h3{font-size:1.18rem;font-weight:700}
p{margin:0 0 1rem}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.small{font-size:.86rem}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;border-radius:8px;z-index:99;box-shadow:var(--shadow)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(251,250,247,.86);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{font-size:1.35rem;filter:saturate(1.1)}
.brand-name{font-size:1.12rem}
.brand-name span{color:var(--accent)}
.site-nav{display:flex;align-items:center;gap:4px}
.site-nav a{color:var(--ink-2);font-weight:600;font-size:.95rem;padding:8px 13px;border-radius:9px}
.site-nav a:hover{background:var(--brand-soft);color:var(--brand-d);text-decoration:none}
.site-nav a[aria-current=page]{color:var(--brand-d);background:var(--brand-soft)}
.nav-burger{display:none;cursor:pointer;width:42px;height:42px;border-radius:10px;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;border:1px solid var(--line);background:#fff}
.nav-burger span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

@media(max-width:720px){
  .nav-burger{display:flex}
  .site-nav{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:2px;background:#fff;border-bottom:1px solid var(--line);padding:10px 16px 16px;
    box-shadow:var(--shadow-lg);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.18s}
  .nav-toggle:checked ~ .site-nav{transform:none;opacity:1;pointer-events:auto}
  .site-nav a{padding:12px 14px;font-size:1rem}
}

/* ---------- layout primitives ---------- */
section{padding:clamp(2.5rem,6vw,4.5rem) 0}
.section-tight{padding:clamp(1.8rem,4vw,3rem) 0}
.lede{font-size:1.2rem;color:var(--ink-2);max-width:60ch}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--brand-d);background:var(--brand-soft);padding:5px 11px;border-radius:999px;margin-bottom:14px}
.center{text-align:center}.center .lede{margin-inline:auto}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:1rem;
  padding:13px 22px;border-radius:12px;border:0;cursor:pointer;transition:.15s;text-decoration:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(91,84,230,.28)}
.btn-primary:hover{background:var(--brand-d);text-decoration:none;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-d);text-decoration:none}
.btn-amazon{background:var(--accent);color:#fff}
.btn-amazon:hover{background:#a96e1f;text-decoration:none}

/* ---------- hero ---------- */
.hero{background:radial-gradient(120% 120% at 80% -10%,#27306b 0%,var(--night) 55%);color:#fff;
  position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(2px 2px at 20% 30%,#fff7,transparent),
  radial-gradient(2px 2px at 70% 20%,#fff5,transparent),
  radial-gradient(1.5px 1.5px at 40% 70%,#fff6,transparent),
  radial-gradient(1.5px 1.5px at 85% 60%,#fff4,transparent),
  radial-gradient(1.5px 1.5px at 55% 40%,#fff5,transparent);opacity:.7;pointer-events:none}
.hero .wrap{position:relative;z-index:1;padding-top:clamp(3rem,8vw,5.5rem);padding-bottom:clamp(3rem,8vw,5rem)}
.hero h1{color:#fff}
.hero .lede{color:#c9cdec}
.hero .eyebrow{color:#cfd2ff;background:rgba(255,255,255,.1)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.22)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.16);border-color:#fff;color:#fff}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow)}
.tool-card{display:flex;flex-direction:column;gap:8px;transition:.18s;color:var(--ink)}
a.tool-card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#dcd7ec}
.tool-card .ico{width:46px;height:46px;display:grid;place-items:center;border-radius:12px;
  background:var(--brand-soft);font-size:1.5rem;margin-bottom:4px}
.tool-card.new .ico{background:var(--accent-soft)}
.tool-card h3{margin:0}
.tool-card .go{margin-top:auto;color:var(--brand-d);font-weight:700;font-size:.92rem}
.badge{align-self:flex-start;font-size:.7rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);padding:3px 9px;border-radius:999px}

/* ---------- calculator ---------- */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);overflow:hidden}
.calc-body{padding:clamp(20px,4vw,30px)}
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;margin-bottom:7px;font-size:.95rem}
.field .hint{font-weight:400;color:var(--muted);font-size:.85rem;margin-left:6px}
input[type=number],input[type=time],select{width:100%;font:inherit;font-size:1.05rem;
  padding:13px 14px;border:1.5px solid var(--line);border-radius:11px;background:#fff;color:var(--ink);appearance:none}
input:focus,select:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.row{display:flex;gap:12px}.row>*{flex:1}
.toggle{display:inline-flex;background:var(--brand-soft);border-radius:11px;padding:4px;gap:4px}
.toggle button{border:0;background:transparent;font:inherit;font-weight:700;font-size:.92rem;
  padding:8px 16px;border-radius:8px;cursor:pointer;color:var(--ink-2)}
.toggle button[aria-pressed=true]{background:#fff;color:var(--brand-d);box-shadow:var(--shadow)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips button{border:1.5px solid var(--line);background:#fff;font:inherit;font-size:.9rem;font-weight:600;
  padding:8px 14px;border-radius:999px;cursor:pointer;color:var(--ink-2)}
.chips button:hover{border-color:var(--brand)}
.chips button[aria-pressed=true]{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-d)}

/* result panel */
.result{background:linear-gradient(180deg,#fff, #faf9ff);border-top:1px solid var(--line);padding:clamp(20px,4vw,30px)}
.result .headline{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.result .big{font-size:clamp(2.4rem,7vw,3.4rem);font-weight:800;letter-spacing:-.03em;color:var(--brand-d);line-height:1}
.result .unit{font-size:1.1rem;font-weight:700;color:var(--ink-2)}
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
@media(max-width:560px){.metric-grid{grid-template-columns:1fr}}
.metric{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-align:center}
.metric .v{font-size:1.7rem;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.metric .v small{font-size:.95rem;font-weight:700;color:var(--muted)}
.metric .k{font-size:.82rem;color:var(--muted);font-weight:600;margin-top:2px}
/* sweet spots */
.sweet{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:620px){.sweet{grid-template-columns:1fr}}
.sweet-card{background:#fff;border:1px solid var(--line);border-left-width:4px;border-radius:12px;padding:16px}
.sweet-card.brain{border-left-color:var(--brand)}
.sweet-card.ex{border-left-color:var(--good)}
.sweet-card.health{border-left-color:#e0567a}
.sweet-ico{font-size:1.4rem}
.sweet-h{font-weight:700;font-size:.95rem;margin-top:4px}
.sweet-v{font-size:1.45rem;font-weight:800;letter-spacing:-.02em;color:var(--ink);margin-top:2px}
.sweet-d{font-size:.8rem;color:var(--muted);margin-top:4px;line-height:1.4}
/* reference table */
.ctable{width:100%;border-collapse:collapse;font-size:.96rem}
.ctable th,.ctable td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line)}
.ctable th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);cursor:pointer;user-select:none;background:#fbfaff}
.ctable th:hover{color:var(--brand-d)}
.ctable th.num,.ctable td.num{text-align:right;white-space:nowrap}
.ctable tbody tr:hover{background:var(--brand-soft)}
.ctable tbody tr:last-child td{border-bottom:0}
.ctable td b{font-weight:800}
.ctable .bar{display:inline-block;width:64px;height:7px;border-radius:4px;background:var(--line);vertical-align:middle;margin-right:9px;overflow:hidden}
.ctable .bar span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:4px}
.bedtimes{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:6px}
@media(max-width:560px){.bedtimes{grid-template-columns:1fr}}
.bedtime{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:14px 16px}
.bedtime.best{border-color:var(--good);background:var(--good-soft)}
.bedtime .t{font-size:1.4rem;font-weight:800;letter-spacing:-.02em}
.bedtime .d{font-size:.82rem;color:var(--muted);text-align:right}
.tag-best{font-size:.68rem;font-weight:800;text-transform:uppercase;color:var(--good);background:#fff;padding:2px 8px;border-radius:999px}

/* prose / FAQ / content */
.prose{max-width:70ch}
.prose h2{margin-top:1.6em}
.prose ul{padding-left:1.2em}
.prose li{margin-bottom:.4em}
.note{background:var(--accent-soft);border:1px solid #f0dcb6;border-radius:12px;padding:14px 16px;font-size:.92rem;color:#7a5a18}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:2px 18px;margin-bottom:10px}
.faq summary{font-weight:700;cursor:pointer;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800;font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details>p{padding-bottom:14px;margin:0;color:var(--ink-2)}
.disclosure{font-size:.82rem;color:var(--muted);margin-top:14px}

/* affiliate */
.gear{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:740px){.gear{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.gear{grid-template-columns:1fr}}
.gear-card{display:flex;flex-direction:column;gap:6px;padding:18px;background:#fff;border:1px solid var(--line);
  border-radius:13px;color:var(--ink);transition:.16s}
a.gear-card:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow)}
.gear-card .emo{font-size:1.5rem}
.gear-card .nm{font-weight:700}
.gear-card .ds{font-size:.86rem;color:var(--muted)}
.gear-card .cta{margin-top:auto;color:var(--accent);font-weight:700;font-size:.88rem}

/* misc */
.bg-soft{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cols{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:start}
@media(max-width:820px){.cols{grid-template-columns:1fr}}
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:10px}
.crumb a{color:var(--muted)}

/* footer */
.site-footer{background:var(--night);color:#c9cdec;margin-top:auto;padding:48px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}
@media(max-width:680px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
.site-footer .brand-name{color:#fff;font-weight:800;font-size:1.1rem}
.site-footer .brand-name span{color:var(--accent)}
.site-footer h3{color:#fff;font-size:.95rem;margin-bottom:12px}
.site-footer nav{display:flex;flex-direction:column;gap:8px}
.site-footer a{color:#aeb3da;font-size:.92rem}
.site-footer a:hover{color:#fff}
.site-footer .muted{color:#8186b3}
.footer-legal{margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1)}
.footer-legal p{margin:.2rem 0}