/* BlatMSG marketing site — dark "coderscape" theme (mirrors the desktop app's palette),
   with a light override. Small, hand-rolled CSS — no framework. */

:root {
  --bg: #0b0e14;
  --elev: #11151d;
  --elev2: #161b25;
  --border: #1f2733;
  --bs: #2b3545;
  --text: #c7d0db;
  --dim: #7d8aa0;
  --faint: #55617a;
  --accent: #5ccfe6;
  --accentd: #2b6f7e;
  --grid: rgba(92, 207, 230, 0.04);
  --nav-bg: rgba(11, 14, 20, 0.82);
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}
:root[data-theme="light"] {
  --bg: #f6f8fa;
  --elev: #ffffff;
  --elev2: #eef1f5;
  --border: #dfe3e9;
  --bs: #c6ccd6;
  --text: #1f2733;
  --dim: #5a6573;
  --faint: #8a94a3;
  --accent: #0a99b8;
  --accentd: #7fc8d6;
  --grid: rgba(10, 153, 184, 0.03);
  --nav-bg: rgba(246, 248, 250, 0.82);
  --shadow: 0 10px 40px rgba(31, 39, 51, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  background: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text);
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
body, .btn, .card, details, .navbar, .step { transition: background-color .18s, border-color .18s, color .18s; }
.mono { font-family: "Cascadia Code", Consolas, ui-monospace, monospace; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; }

/* ---- Nav --------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.navbar { display: flex; align-items: center; gap: 18px; padding: 12px 24px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; text-decoration: none; color: var(--text); white-space: nowrap; }
.brand .brand-logo { color: var(--accent); display: inline-flex; }
.brand .m { color: var(--accent); }
.navlinks { display: flex; gap: 22px; margin: 0 auto; }
.navlinks a { color: var(--dim); text-decoration: none; font-size: 14px; font-weight: 500; }
.navlinks a:hover { color: var(--accent); }
.navactions { display: flex; align-items: center; gap: 10px; }
.menu-toggle { display: none; background: none; border: 1px solid var(--bs); color: var(--text); border-radius: 8px; width: 36px; height: 36px; font-size: 16px; cursor: pointer; }

@media (max-width: 760px) {
  .navlinks {
    position: absolute; top: 100%; left: 0; right: 0; margin: 0;
    flex-direction: column; gap: 0; background: var(--elev); border-bottom: 1px solid var(--border);
    max-height: 0; overflow: hidden;
  }
  .navlinks.open { max-height: 260px; }
  .navlinks a { padding: 14px 24px; border-top: 1px solid var(--border); }
  .navactions .btn.small { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: 9px; padding: 13px 20px; border-radius: 8px;
  border: 1px solid var(--bs); background: var(--elev2); color: var(--text); text-decoration: none;
  font-size: 15px; font-weight: 600; cursor: pointer;
}
.btn:hover { border-color: var(--accentd); }
.btn.primary { background: var(--accentd); border-color: var(--accent); color: #03161a; }
.btn.primary:hover { background: var(--accent); }
.btn.disabled { opacity: .5; cursor: not-allowed; }
.btn.small { padding: 8px 14px; font-size: 13px; }
.soon { font-size: 11px; color: var(--faint); }

/* ---- Hero --------------------------------------------------------------- */
header.hero { text-align: center; padding: 76px 24px 44px; position: relative; overflow: hidden; }
header.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 420px;
  background: radial-gradient(closest-side, var(--accentd) 0%, transparent 70%);
  opacity: .16; pointer-events: none;
}
.hero-logo { color: var(--accent); display: flex; justify-content: center; position: relative; }
h1 { font-size: 48px; margin: 18px 0 8px; letter-spacing: .5px; position: relative; }
h1 .m { color: var(--accent); }
.tag { color: var(--dim); font-size: 18px; max-width: 560px; margin: 0 auto; position: relative; }
.downloads { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 34px 0 8px; position: relative; }
.note { color: var(--faint); font-size: 13px; margin-top: 10px; position: relative; }

/* ---- Sections + reveal-on-scroll ---------------------------------------- */
section { padding: 34px 0; border-top: 1px solid var(--border); scroll-margin-top: 76px; }
h2 { font-size: 26px; margin: 0 0 8px; }
.section-lead { color: var(--dim); margin: 0 0 22px; max-width: 640px; }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---- Feature cards -------------------------------------------------------*/
.feat { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--elev); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.card .icon {
  width: 36px; height: 36px; border-radius: 9px; display: flex; align-items: center; justify-content: center;
  background: rgba(92, 207, 230, 0.14); background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent); margin-bottom: 12px;
}
.card .icon svg { width: 19px; height: 19px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--dim); font-size: 14px; }

/* ---- How it works: step rail --------------------------------------------*/
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.step { background: var(--elev); border: 1px solid var(--border); border-radius: 12px; padding: 18px; position: relative; }
.step .n {
  width: 26px; height: 26px; border-radius: 50%; background: var(--accentd); color: #03161a;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; margin-bottom: 10px;
}
.step h3 { margin: 0 0 4px; font-size: 15px; }
.step p { margin: 0; color: var(--dim); font-size: 13px; }
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }

.video-wrap { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #000; box-shadow: var(--shadow); }
.video-wrap video { display: block; width: 100%; height: auto; }

/* ---- FAQ / accordion ------------------------------------------------------*/
details { border: 1px solid var(--border); border-radius: 10px; padding: 0 16px; margin-bottom: 10px; background: var(--elev); }
details[open] { border-color: var(--bs); }
summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "+ "; color: var(--accent); }
details[open] summary::before { content: "\2212 "; }
details p, details ul { color: var(--dim); margin: 0 0 14px; font-size: 14px; }

/* ---- Legal pages (privacy / terms) ---------------------------------------*/
.legal { padding: 44px 0 20px; }
.legal h1 { font-size: 32px; margin: 0 0 4px; text-align: left; }
.legal .updated { color: var(--faint); font-size: 13px; margin: 0 0 30px; }
.legal h2 { font-size: 19px; margin: 30px 0 8px; }
.legal p { color: var(--dim); font-size: 15px; }
.legal strong { color: var(--text); }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--dim); text-decoration: none; font-size: 14px; margin-bottom: 18px; }
.back-link:hover { color: var(--accent); }

/* ---- Footer ---------------------------------------------------------------*/
footer { border-top: 1px solid var(--border); padding: 30px 0 60px; color: var(--faint); font-size: 13px; text-align: center; }
footer .footer-links { margin-bottom: 8px; }
footer a { color: var(--dim); text-decoration: none; margin: 0 8px; }
footer a:hover { color: var(--accent); }
.theme-toggle { display: inline-block; margin: 0 8px; background: none; border: 1px solid var(--bs); color: var(--dim); border-radius: 999px; padding: 4px 12px; font: inherit; font-size: 13px; cursor: pointer; }
.theme-toggle:hover { color: var(--accent); border-color: var(--accentd); }