:root{
  --bg:#F2F4F7; --surface:#FFFFFF; --ink:#0D1424; --muted:#5B6478; --line:#DDE2EA;
  --cobalt:#2E4BFF; --cobalt-soft:#E6EAFF; --mint:#0F9F72; --mint-soft:#DDF5EC;
  --c-product:#2E4BFF; --c-research:#8B3FD9; --c-safety:#D9480F; --c-api:#0F9F72; --c-company:#5B6478; --c-policy:#B7791F;
  --serif:'Newsreader',Georgia,'Times New Roman',serif;
  --sans:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0A0F1C; --surface:#121A2C; --ink:#E8ECF5; --muted:#98A2B8; --line:#243049;
    --cobalt:#7C8CFF; --cobalt-soft:#1C2550; --mint:#3DD6A3; --mint-soft:#10332A;
    --c-product:#7C8CFF; --c-research:#B98AF0; --c-safety:#FF8A5B; --c-api:#3DD6A3; --c-company:#98A2B8; --c-policy:#E5B45A;
  }
}
:root[data-theme="dark"]{
  --bg:#0A0F1C; --surface:#121A2C; --ink:#E8ECF5; --muted:#98A2B8; --line:#243049;
  --cobalt:#7C8CFF; --cobalt-soft:#1C2550; --mint:#3DD6A3; --mint-soft:#10332A;
  --c-product:#7C8CFF; --c-research:#B98AF0; --c-safety:#FF8A5B; --c-api:#3DD6A3; --c-company:#98A2B8; --c-policy:#E5B45A;
}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 72px);-webkit-text-size-adjust:100%}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--sans)}
a{color:inherit}
button,input{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:6px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:16px;z-index:99;background:var(--surface);padding:8px 12px}
.muted{color:var(--muted)}

/* Header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:16px;height:60px}
.mark{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--serif);font-weight:600;font-size:22px;letter-spacing:-.01em;margin:0}
.mark svg{width:34px;height:20px;fill:none;stroke:var(--cobalt);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.mark.small{font-size:18px;margin-bottom:8px}
.stamp{margin:0 0 0 auto;font-size:14px;color:var(--muted);text-align:right}
.stamp b{color:var(--ink);font-weight:500}
.theme{border:1px solid var(--line);background:var(--surface);width:38px;height:38px;border-radius:50%;cursor:pointer;font-size:18px;flex:none}

/* Lead story */
.lead{padding:44px 0 28px;display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:40px;align-items:end}
.lead-kicker{display:flex;gap:10px;align-items:center;font-size:14px;color:var(--muted);margin:0 0 14px}
.new{background:var(--mint-soft);color:var(--mint);font-weight:700;font-size:13px;padding:2px 10px;border-radius:999px}
.lead h1{font-family:var(--serif);font-weight:500;font-size:clamp(34px,5.4vw,60px);line-height:1.04;letter-spacing:-.02em;margin:0 0 18px;text-wrap:balance}
.lead h1 a{text-decoration:none}
.lead h1 a:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}
.lead .sum{font-size:19px;line-height:1.55;max-width:60ch;margin:0}
.why{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--cobalt);border-radius:4px 14px 14px 4px;padding:18px 20px}
.why h2{font-family:var(--sans);font-size:14px;font-weight:700;color:var(--cobalt);margin:0 0 6px}
.why p{margin:0 0 14px;font-size:17px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--cobalt);color:#fff;text-decoration:none;font-weight:700;padding:11px 18px;border-radius:999px;font-size:15px;border:0;cursor:pointer}
:root[data-theme="dark"] .btn{color:#0A0F1C}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn{color:#0A0F1C}}

/* Pulse strip */
.pulse{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0 14px;margin-bottom:28px}
.pulse-head{display:flex;justify-content:space-between;align-items:baseline}
.pulse h2{font-family:var(--sans);font-size:14px;font-weight:700;margin:0;color:var(--muted)}
#pulseSvg{display:block;width:100%;height:90px;margin-top:8px;overflow:visible}
#pulseSvg .base{fill:none;stroke:var(--line);stroke-width:1}
#pulseSvg .beat{fill:none;stroke:var(--cobalt);stroke-width:2.2;stroke-linejoin:round;stroke-linecap:round;vector-effect:non-scaling-stroke}
.pulse-days{position:relative;height:0}
.dayhit{position:absolute;top:-98px;height:98px;background:transparent;border:0;cursor:pointer;padding:0}
.dayhit:hover,.dayhit[aria-pressed="true"]{background:color-mix(in srgb,var(--cobalt) 12%,transparent);border-radius:6px}
.dayhit:disabled{cursor:default}
.dayhit:disabled:hover{background:transparent}
.link{border:0;background:none;color:var(--cobalt);font-weight:700;cursor:pointer;padding:0;font-size:14px}

/* Tools */
.tools{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:8px}
.search{flex:1 1 240px}
.search input{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:11px 18px;font-size:15px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:7px 14px;font-size:14px;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:7px}
.chip i{width:8px;height:8px;border-radius:50%;background:var(--dot,var(--muted))}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}

/* Feed */
.feed{padding:12px 0 60px}
.day{display:grid;grid-template-columns:150px minmax(0,1fr);gap:28px;padding:24px 0;border-top:1px solid var(--line)}
.day:first-child{border-top:0}
.day-label{position:sticky;top:84px;align-self:start}
.day-label b{font-family:var(--serif);font-weight:500;font-size:26px;display:block;line-height:1.1}
.day-label span{color:var(--muted);font-size:14px}
.stories{display:grid;gap:14px}
.story{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.story-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:6px}
.cat{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--dot)}
.cat i{width:8px;height:8px;border-radius:50%;background:var(--dot)}
.story h3{font-family:var(--serif);font-weight:500;font-size:23px;line-height:1.2;margin:0 0 6px;letter-spacing:-.01em;text-wrap:balance}
.story h3 a{text-decoration:none}
.story h3 a:hover{text-decoration:underline;text-underline-offset:4px}
.story p{margin:0;max-width:68ch}
.story .w{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);font-size:15px}
.story .w b{color:var(--cobalt)}
.story-foot{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px}
.tag{font-size:12px;color:var(--muted);background:var(--bg);border-radius:6px;padding:2px 8px}
.share{margin-left:auto;border:1px solid var(--line);background:transparent;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:500;cursor:pointer}
.empty{background:var(--surface);border:1px dashed var(--line);border-radius:16px;padding:36px;text-align:center;color:var(--muted)}
.empty h3{font-family:var(--serif);font-weight:500;color:var(--ink);font-size:24px;margin:0 0 6px}
.skel{height:120px;border-radius:16px;background:linear-gradient(90deg,var(--surface),var(--line),var(--surface));background-size:200% 100%;animation:sh 1.4s infinite}
@keyframes sh{to{background-position:-200% 0}}

/* Footer */
.foot{border-top:1px solid var(--line);padding:32px 0 48px;font-size:14px;color:var(--muted)}
.foot-in{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.foot p{margin:0 0 10px;max-width:56ch}
.foot .mark{color:var(--ink)}

.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translate(-50%,16px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:14px;font-weight:700;opacity:0;transition:.2s;pointer-events:none}
.toast.on{opacity:1;transform:translate(-50%,0)}

@media (max-width:760px){
  .lead{grid-template-columns:1fr;gap:22px;padding-top:28px}
  .day{grid-template-columns:1fr;gap:10px}
  .day-label{position:static;display:flex;gap:10px;align-items:baseline}
  .day-label b{font-size:22px}
  .foot-in{grid-template-columns:1fr}
  .stamp{font-size:12px}
  .story{padding:16px}
  .story h3{font-size:21px}
}
@media (prefers-reduced-motion:reduce){.skel{animation:none}.toast{transition:none}}