:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #16202e;
  --muted: #5a6678;
  --line: #dde3ec;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --dup: #c2410c;
  --dup-bg: #fff1e8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.wrap {
  width: min(1040px, 100%);
  margin: 0 auto;
  padding-inline: 20px;
}

a { color: var(--accent); }

/* ---------- Top bar ---------- */

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.logo {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  background:
    linear-gradient(var(--accent-ink), var(--accent-ink)) 5px 6px / 12px 2px no-repeat,
    linear-gradient(var(--accent-ink), var(--accent-ink)) 5px 10px / 12px 2px no-repeat,
    linear-gradient(var(--accent-ink), var(--accent-ink)) 5px 14px / 8px 2px no-repeat,
    var(--accent);
}

.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

.back:hover { color: var(--ink); text-decoration: underline; }

/* ---------- Hero ---------- */

.hero { padding-block: 56px 28px; }

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.lede {
  margin: 0 0 24px;
  max-width: 40em;
  color: var(--muted);
  font-size: 18px;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
}

.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.btn.primary:hover { filter: brightness(1.08); }

.btn.disabled { color: var(--muted); cursor: not-allowed; }

.note {
  margin: 14px 0 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- Grid illustration ---------- */

.mock {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  box-shadow: 0 10px 30px rgba(22, 32, 46, 0.08);
  overflow: hidden;
}

/* Windows 11 style title bar */
.mock-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding-left: 12px;
  background: #f3f3f3;
  font-family: "Segoe UI", "Inter", system-ui, sans-serif;
}

.app-icon {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: var(--accent);
}

.mock-title { font-size: 12px; color: #1b1b1b; }

.win-controls { display: flex; margin-left: auto; height: 100%; }

.win-controls span {
  position: relative;
  width: 46px;
  height: 100%;
}

.win-controls .min::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 16px;
  width: 10px;
  height: 1px;
  background: #1b1b1b;
}

.win-controls .max::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 12px;
  width: 8px;
  height: 8px;
  border: 1px solid #1b1b1b;
  border-radius: 1px;
}

.win-controls .close::before,
.win-controls .close::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 16px;
  width: 12px;
  height: 1px;
  background: #1b1b1b;
  transform: rotate(45deg);
}

.win-controls .close::after { transform: rotate(-45deg); }

.mock-tabs {
  display: flex;
  gap: 2px;
  padding: 6px 12px 0;
  background: #f3f3f3;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}

.mock-tabs .tab {
  padding: 5px 12px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  color: var(--muted);
}

.mock-tabs .tab.on {
  background: var(--card);
  border-color: var(--line);
  color: var(--ink);
  margin-bottom: -1px;
}

.mock-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 14px;
  font-size: 13px;
}

.chip { padding: 3px 9px; border-radius: 6px; color: var(--muted); }

.chip.btnish { border: 1px solid var(--line); color: var(--ink); }

.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.chip.filter { border: 1px solid var(--line); min-width: 120px; }

.mock-grid {
  overflow-x: auto;
  font-size: 13px;
}

.row {
  display: grid;
  grid-template-columns: minmax(170px, 1.4fr) 70px repeat(3, minmax(170px, 1fr));
  min-width: 760px;
  border-top: 1px solid var(--line);
}

.row span { padding: 8px 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.row.head { background: #f8fafc; font-weight: 600; }

.code { font-family: "JetBrains Mono", Consolas, monospace; font-size: 12.5px; }

.code.dup { color: var(--dup); background: var(--dup-bg); font-weight: 500; }

.mock-caption {
  margin: 0;
  padding: 10px 14px 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

/* ---------- Features ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  padding-block: 36px;
}

.features article {
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.features h2 { margin: 0 0 8px; font-size: 17px; }

.features p { margin: 0; color: var(--muted); font-size: 15px; }

.footer {
  padding-block: 10px 40px;
  color: var(--muted);
  font-size: 14px;
}