/* Blade Build — landing page styles.
   Minimalist, brand blues (deep + light) pulled from the logo. No frameworks. */

:root {
  --blue: #2436db;          /* deep brand blue */
  --blue-strong: #1b27b3;
  --blue-soft: #8fb4f7;     /* light brand blue */
  --ink: #0d1230;           /* near-black navy for text */
  --muted: #5c6480;         /* secondary text */
  --line: #e9ebf3;          /* hairline borders */
  --surface: #ffffff;
  --surface-tint: #f6f8fd;  /* faint section background */
  --term-bg: #0c1022;       /* terminal / code background */
  --term-fg: #d7def0;
  --radius: 14px;
  --maxw: 1080px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace,
          Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-strong); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--ink); }
.nav .nav-github { display: inline-flex; align-items: center; gap: 7px; }
.nav .nav-github svg { width: 18px; height: 18px; fill: currentColor; }

.lang-toggle {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.lang-toggle:hover { border-color: var(--blue-soft); color: var(--blue); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .08s ease, box-shadow .2s ease, background .2s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 18px rgba(36, 54, 219, 0.28);
}
.btn-primary:hover { background: var(--blue-strong); color: #fff; }
.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--blue-soft); color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 72px;
  text-align: center;
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  z-index: 0;
}
.hero::before {
  width: 520px; height: 520px;
  background: radial-gradient(circle, var(--blue-soft), transparent 70%);
  top: -180px; left: 50%; transform: translateX(-60%);
}
.hero::after {
  width: 460px; height: 460px;
  background: radial-gradient(circle, #c9d6fb, transparent 70%);
  top: -120px; right: -120px;
}
.hero .container { position: relative; z-index: 1; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  background: rgba(36, 54, 219, 0.08);
  border: 1px solid rgba(36, 54, 219, 0.16);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 auto 18px;
  max-width: 14ch;
  font-weight: 800;
}
.hero h1 .accent {
  background: linear-gradient(120deg, var(--blue), var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede {
  font-size: clamp(17px, 2.1vw, 20px);
  color: var(--muted);
  max-width: 62ch;
  margin: 0 auto 34px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.platforms {
  font-size: 14px;
  color: var(--muted);
}
.platforms strong { color: var(--ink); font-weight: 600; }

/* ---------- Install command ---------- */
.install {
  margin: 40px auto 0;
  max-width: 640px;
}
.install-label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  text-align: left;
  font-weight: 500;
}
.os-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}
.os-tab {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.os-tab:hover { color: var(--ink); border-color: var(--blue-soft); }
.os-tab.active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}
.cmd {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--term-bg);
  border-radius: 12px;
  padding: 16px 16px 16px 20px;
  box-shadow: 0 14px 40px rgba(13, 18, 48, 0.18);
}
.cmd code {
  flex: 1;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--term-fg);
  text-align: left;
  overflow-x: auto;
  white-space: nowrap;
}
.cmd code .prompt { color: var(--blue-soft); user-select: none; }
.copy-btn {
  flex: none;
  background: rgba(255, 255, 255, 0.08);
  color: #cdd6ee;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background .15s ease, color .15s ease;
}
.copy-btn:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }
.copy-btn.copied { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- Section scaffolding ---------- */
section { padding: 80px 0; }
.section-tint { background: var(--surface-tint); border-block: 1px solid var(--line); }
.section-head { text-align: center; max-width: 60ch; margin: 0 auto 52px; }
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 38px);
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  font-weight: 800;
}
.section-head p { color: var(--muted); font-size: 18px; margin: 0; }

/* ---------- Terminal demo ---------- */
.terminal {
  max-width: 760px;
  margin: 0 auto;
  background: var(--term-bg);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(13, 18, 48, 0.28);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  background: #11162c;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.terminal-bar .dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.r { background: #ff5f57; }
.dot.y { background: #febc2e; }
.dot.g { background: #28c840; }
.terminal-bar .title {
  margin-left: 10px; color: #8a93b2; font-size: 13px; font-family: var(--mono);
}
.terminal pre {
  margin: 0;
  padding: 22px 24px;
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--term-fg);
  overflow-x: auto;
}
.terminal .c-prompt { color: var(--blue-soft); }
.terminal .c-cmd { color: #fff; }
.terminal .c-ok { color: #41d67e; }
.terminal .c-dim { color: #79829f; }
.terminal .c-blue { color: #7aa2ff; }

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(13, 18, 48, 0.08);
  border-color: var(--blue-soft);
}
.feature .ico {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: rgba(36, 54, 219, 0.08);
  margin-bottom: 18px;
}
.feature .ico svg { width: 22px; height: 22px; stroke: var(--blue); fill: none; stroke-width: 1.8; }
.feature h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- Languages strip ---------- */
.langs {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}
.lang-chip {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
}

/* ---------- CTA band ---------- */
.cta-band { text-align: center; }
.cta-band h2 { font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 16px; letter-spacing: -0.02em; }
.cta-band p { color: var(--muted); font-size: 18px; margin: 0 0 30px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer .brand { font-size: 16px; color: var(--ink); }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-weight: 500; }
.footer-links a:hover { color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .nav { gap: 18px; }
  .nav a:not(.nav-github) { display: none; }
  .hero { padding: 72px 0 56px; }
  .features { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
}