:root{
  --primary:#1A67FD; --secondary:#0A0D16; --tertiary:#BFFF5A; --neutral:#FCFCFD;
  --text-primary:#0A0D16; --text-secondary:#4E5057; --text-tertiary:#74767C;
  --surface-100:#FCFCFD; --surface-200:#F8F8FC; --surface-300:#F6F6F9; --surface-400:#F0F0F9;
  --border-100:#EBEEF7; --border-200:#D5D9E8;
  --blue-100:#7AE3FF; --blue-200:#46D8FF; --blue-300:#00B9EB;
  --green-light-100:#CCFF89; --green-light-200:#B7FF5A; --green-light-300:#73B420;
  --red-100:#FF9688; --red-200:#FF806E; --red-300:#FF2203;
  --orange-100:#FFB55E; --orange-200:#FFA030;
  --positive-400:#38A865;
  --shadow-panel:#0A0D1614; --shadow-base:#0A0D1633;
  --grid:24px; --content-max:1200px;
  --font-sans:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;
}
[data-theme="dark"]{
  --primary:#5B8FFF;
  --text-primary:#B8B8BC; --text-secondary:#87878B; --text-tertiary:#868688;
  --surface-100:#17171C; --surface-200:#1E1E24; --surface-300:#17171C; --surface-400:#17171C;
  --border-100:#22242A; --border-200:#292C32;
  --red-300:#FF5138; --orange-200:#FFA030;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--surface-100); color:var(--text-primary);
  font-family:var(--font-sans); font-size:16px; line-height:24px;
}
a{color:var(--primary); text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--primary); outline-offset:3px; border-radius:2px}

/* ---------- chrome ---------- */
.site-header{
  position:sticky; top:0; z-index:50; background:var(--surface-100);
  box-shadow:0 1px 0 0 var(--border-100);
}
.site-header .row{
  max-width:var(--content-max); margin:0 auto; height:72px;
  display:flex; align-items:center; justify-content:space-between; padding-inline:24px;
}
.brand{display:inline-flex; align-items:baseline; gap:1px; font-weight:700; font-size:19px; letter-spacing:-.19px; color:var(--text-primary)}
.brand:hover{text-decoration:none}
.brand .host{color:var(--text-tertiary); font-weight:400}
.chip-btn{
  height:32px; padding-inline:12px; display:inline-flex; align-items:center; gap:8px;
  background:var(--surface-100); border:1px solid var(--border-200); color:var(--text-secondary);
  box-shadow:2px 2px 0 0 var(--surface-400); font:500 13px/16px var(--font-sans); cursor:pointer;
}
.chip-btn:hover{border-color:var(--text-primary); color:var(--text-primary)}
[data-theme="dark"] .chip-btn{box-shadow:2px 2px 0 0 var(--border-100)}
.wrap{max-width:var(--content-max); margin:0 auto; padding-inline:24px}

/* ---------- hero ---------- */
.hero{padding-top:48px; padding-bottom:32px}
.eyebrow{
  display:flex; align-items:center; gap:8px; font:500 11px/16px var(--font-sans);
  text-transform:uppercase; letter-spacing:.08em; color:var(--text-tertiary); margin-bottom:24px;
}
.eyebrow .dot{width:8px; height:8px; border-radius:9999px; background:var(--positive-400)}
h1{
  font-size:48px; line-height:48px; letter-spacing:-1px; font-weight:700; margin:0 0 24px;
  max-width:15ch;
}
.lede{font-size:16px; color:var(--text-secondary); max-width:60ch; margin:0 0 24px}
.hero-meta{display:flex; flex-wrap:wrap; gap:8px 24px; font-size:13px; color:var(--text-tertiary)}
.hero-meta strong{color:var(--text-primary); font-weight:600}

/* ---------- calculator ---------- */
.calc{
  background:var(--surface-200); border:1px solid var(--border-100); border-radius:8px;
  margin-bottom:48px; overflow:hidden;
}
.calc-strip{
  height:24px; display:flex; align-items:center; border-bottom:1px solid var(--border-100);
}
.calc-strip span{
  background:var(--green-light-100); color:var(--secondary); height:24px; display:inline-flex; align-items:center;
  padding-inline:8px; font:500 11px/16px var(--font-sans); text-transform:uppercase; letter-spacing:.04em;
  border-top-left-radius:3px;
}
.calc-body{padding:24px; display:grid; gap:24px; grid-template-columns:1fr 1fr}
.field label{display:block; font:600 14px/24px var(--font-sans); margin-bottom:4px}
.field .hint{display:block; font-size:12px; line-height:16px; color:var(--text-tertiary); margin-bottom:12px}
.readout{
  font-family:var(--font-mono); font-size:22px; line-height:24px; font-weight:500;
  color:var(--text-primary); margin-bottom:12px;
}
input[type=range]{width:100%; accent-color:var(--primary); margin:0}
.presets{display:flex; flex-wrap:wrap; gap:8px; margin-top:12px}
.preset{
  height:28px; padding-inline:10px; border:1px solid var(--border-200); background:var(--surface-100);
  color:var(--text-secondary); font:500 12px/16px var(--font-sans); cursor:pointer; border-radius:9999px;
}
.preset:hover{border-color:var(--text-primary); color:var(--text-primary)}
.preset[aria-pressed=true]{background:var(--secondary); border-color:var(--secondary); color:var(--neutral)}
[data-theme="dark"] .preset[aria-pressed=true]{background:var(--border-200); border-color:var(--border-200); color:var(--text-primary)}

/* verdict band */
.verdict{
  border-top:1px solid var(--border-100); padding:24px; display:grid; gap:24px;
  grid-template-columns:repeat(3,1fr); background:var(--surface-100);
}
.stat .k{font:500 11px/16px var(--font-sans); text-transform:uppercase; letter-spacing:.06em; color:var(--text-tertiary)}
.stat .v{font-family:var(--font-mono); font-size:32px; line-height:40px; font-weight:500}
.stat .n{font-size:13px; line-height:20px; color:var(--text-secondary)}
.v.cheap{color:var(--positive-400)}
.v.dear{color:var(--red-300)}

/* ---------- results ---------- */
h2{font-size:22px; line-height:24px; letter-spacing:-1px; font-weight:700; margin:48px 0 8px}
h3{font-size:18px; line-height:24px; letter-spacing:-1px; font-weight:700; margin:32px 0 8px}
.sub{font-size:14px; color:var(--text-secondary); margin:0 0 24px; max-width:70ch}
.table-scroll{overflow-x:auto; border:1px solid var(--border-100); border-radius:8px; background:var(--surface-200)}
table{width:100%; border-collapse:collapse; min-width:720px}
thead th{
  background:var(--surface-300); font:500 11px/16px var(--font-sans); text-transform:uppercase;
  color:var(--text-secondary); text-align:left; white-space:nowrap; padding:8px 16px;
  border-bottom:1px solid var(--border-200);
}
thead th.num, td.num{text-align:right}
tbody td{padding:8px 16px; font-size:14px; border-bottom:1px solid var(--border-100); vertical-align:middle}
tbody tr:hover{background:var(--surface-300)}
tbody tr:last-child td{border-bottom:0}
.pname{font-weight:600; white-space:nowrap}
.tag{
  display:inline-block; font:500 11px/16px var(--font-sans); padding:0 6px; border-radius:4px;
  background:var(--surface-400); color:var(--text-secondary); white-space:nowrap;
}
[data-theme="dark"] .tag{background:var(--border-100)}
.cost{font-family:var(--font-mono); font-size:14px; white-space:nowrap}
.bar{height:8px; border-radius:9999px; background:var(--border-200); min-width:2px}
.bar.zero{background:var(--positive-400)}
.barcell{width:200px}
.flag{color:var(--orange-200); font-weight:600}

/* ---------- cards ---------- */
.cards{display:grid; gap:24px; grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--surface-200); border:1px solid var(--border-100); border-radius:8px; padding:24px;
}
.card h4{font-size:16px; line-height:24px; font-weight:600; margin:0 0 8px}
.card p{font-size:14px; color:var(--text-secondary); margin:0}
.card .num{font-family:var(--font-mono); font-size:22px; line-height:32px; font-weight:500; color:var(--text-primary); display:block; margin-bottom:4px}

/* ---------- timeline ---------- */
.rail{display:grid; gap:0; grid-template-columns:repeat(4,1fr); border:1px solid var(--border-100); border-radius:8px; overflow:hidden}
.ev{padding:24px 16px; border-right:1px solid var(--border-100); background:var(--surface-200)}
.ev:last-child{border-right:0}
.ev.future{background:var(--surface-100)}
.ev time{font-family:var(--font-mono); font-size:13px; color:var(--text-tertiary); display:block; margin-bottom:8px}
.ev .t{font-size:14px; font-weight:600; display:block; margin-bottom:4px}
.ev p{font-size:13px; line-height:20px; color:var(--text-secondary); margin:0}
.ev.future time{color:var(--red-300)}

/* ---------- prose, faq, footer ---------- */
.prose p, .prose li{font-size:14px; line-height:24px; color:var(--text-secondary)}
.prose ol, .prose ul{padding-left:20px; margin:0 0 16px}
.prose li{margin-bottom:4px}
.prose strong{color:var(--text-primary); font-weight:600}
details{border-bottom:1px solid var(--border-100); padding:12px 0}
details summary{font-size:16px; font-weight:600; cursor:pointer; color:var(--text-primary); list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::before{content:'+ '; color:var(--text-tertiary); font-family:var(--font-mono)}
details[open] summary::before{content:'- '}
details p{font-size:14px; color:var(--text-secondary); margin:8px 0 0}
.srcs{font-size:13px; line-height:24px; color:var(--text-secondary); columns:2; column-gap:48px; margin:0; padding-left:20px}
.site-footer{margin-top:72px; border-top:1px solid var(--border-100); padding:32px 0 48px}
.site-footer p{font-size:13px; color:var(--text-tertiary); margin:0 0 4px}
code{font-family:var(--font-mono); font-size:.875em; background:var(--surface-400); border-radius:4px; padding:1px 4px}
[data-theme="dark"] code{background:var(--surface-200); border:1px solid var(--border-200)}

@media (max-width:1023px){
  .cards, .calc-body{grid-template-columns:1fr}
  .verdict{grid-template-columns:1fr}
  .rail{grid-template-columns:1fr 1fr}
  .ev:nth-child(2){border-right:0}
  .ev:nth-child(-n+2){border-bottom:1px solid var(--border-100)}
  .srcs{columns:1}
}
@media (max-width:767px){
  h1{font-size:32px; line-height:36px}
  .site-header .row{height:56px; padding-inline:16px}
  .wrap{padding-inline:16px}
  .rail{grid-template-columns:1fr}
  .ev{border-right:0; border-bottom:1px solid var(--border-100)}
}