:root {
  --bg: #ECEAE5;
  --surface: #F6F5F2;
  --text: #0D0E10;
  --dim: #4B4E53;
  --stroke: #CFCCC4;
  --mint: #14B884;
  --accent: #0A7A57;
  --btn: #0D0E10;
  --on-btn: #ECEAE5;
  --rail: linear-gradient(90deg, #B9B6AF, #E4E2DC 45%, #A9A6A0);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D0E10;
    --surface: #16171A;
    --text: #ECEAE5;
    --dim: #A3A6AB;
    --stroke: #2A2C30;
    --mint: #14B884;
    --accent: #5FE0B4;
    --btn: #ECEAE5;
    --on-btn: #0D0E10;
    --rail: linear-gradient(90deg, #2B2D31, #4A4C51 45%, #232528);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 17px/1.6 "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; font-size: 12px; font-variant-numeric: tabular-nums; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; gap: 10px; padding: 22px 0; }
header.top img { width: 30px; height: 30px; border-radius: 8px; }
header.top b { font-family: "IBM Plex Mono", ui-monospace, monospace; font-weight: 500; letter-spacing: .2em; font-size: 14px; }
header.top nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
header.top nav a { color: var(--dim); }
.hero { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; padding: 44px 0 26px; }
.hero .mono { color: var(--dim); }
.hero h1 { font-weight: 700; font-size: clamp(36px, 7.5vw, 62px); line-height: 1.04; letter-spacing: -.035em; margin: 14px 0 20px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--dim); font-size: 19px; max-width: 32em; margin: 0 0 28px; }
.btn { display: inline-flex; align-items: center; gap: 10px; background: var(--btn); color: var(--on-btn); padding: 15px 26px; border-radius: 12px; font-weight: 600; }
.btn:hover { text-decoration: none; opacity: .92; }
.note { color: var(--dim); font-size: 14px; margin-top: 14px; }
/* phone side profile with the rail */
.side { position: relative; width: 120px; height: 340px; border-radius: 34px; background: var(--rail); box-shadow: inset 0 0 0 1px rgba(0,0,0,.18); }
.side .key { position: absolute; right: -7px; width: 9px; border-radius: 4px; background: var(--rail); box-shadow: inset 0 0 0 1px rgba(0,0,0,.2); }
.side .k1 { top: 78px; height: 58px; background: var(--mint); box-shadow: 0 0 0 3px rgba(20,184,132,.18); }
.side .k2 { top: 146px; height: 58px; }
.side .k3 { top: 226px; height: 34px; }
.side .ticks { position: absolute; left: 22px; top: 78px; height: 126px; width: 16px; background: repeating-linear-gradient(180deg, var(--dim) 0 1px, transparent 1px 8.4px); opacity: .55; }
.side .lvl { position: absolute; left: 46px; top: 92px; font: 500 15px "IBM Plex Mono", monospace; color: var(--accent); font-variant-numeric: tabular-nums; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 30px 0; }
.card { background: var(--surface); border: 1px solid var(--stroke); border-radius: 12px; padding: 20px; }
.card .mono { color: var(--accent); font-size: 11px; }
.card h3 { font-weight: 700; font-size: 18px; margin: 8px 0 6px; letter-spacing: -.01em; }
.card p { color: var(--dim); margin: 0; font-size: 15px; }
.card .pro { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 5px; background: var(--mint); color: #0D0E10; font: 600 10px "IBM Plex Mono", monospace; letter-spacing: .08em; vertical-align: 2px; }
h2 { font-weight: 700; font-size: 28px; letter-spacing: -.02em; margin: 50px 0 12px; }
ul.list { padding-left: 1.1em; }
ul.list li { margin: 6px 0; }
ul.list li::marker { color: var(--mint); }
.doc h1 { font-weight: 700; font-size: 40px; letter-spacing: -.03em; margin: 30px 0 6px; }
.doc h2 { font-size: 21px; font-weight: 700; margin: 34px 0 8px; letter-spacing: -.01em; }
.doc .meta { color: var(--dim); font-size: 15px; }
footer { border-top: 1px solid var(--stroke); margin-top: 70px; padding: 26px 0 40px; color: var(--dim); font-size: 14px; display: flex; flex-wrap: wrap; gap: 18px; }
footer a { color: var(--dim); }
@media (max-width: 640px) {
  .hero { grid-template-columns: 1fr; gap: 18px; }
  .side { display: none; }
}