:root {
  --bg:        #0a0a0a;
  --bg1:       #111111;
  --bg2:       #161616;
  --bg3:       #1c1c1c;
  --border:    #242424;
  --border2:   #2e2e2e;
  --text:      #d8d8d8;
  --text2:     #888;
  --text3:     #444;
  --green:     #4ade80;
  --green-dim: #1a3a28;
  --green-bg:  #0f2018;
  --blue:      #60a5fa;
  --blue-dim:  #1a2a3a;
  --amber:     #fbbf24;
  --red:       #f87171;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Syne', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  background-image:
    linear-gradient(rgba(74,222,128,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,222,128,0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ── beta banner ── */
#beta-bar {
  background: linear-gradient(90deg, var(--green-bg), #0a1f14, var(--green-bg));
  border-bottom: 1px solid var(--green-dim);
  padding: 8px 24px;
  text-align: center;
  font-size: 11px;
  color: var(--green);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  z-index: 100;
  animation: pulse-bar 4s ease-in-out infinite;
}
@keyframes pulse-bar { 0%,100%{opacity:1} 50%{opacity:0.7} }
#beta-bar .dot {
  display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--green);
  margin-right: 8px; vertical-align: middle;
  box-shadow: 0 0 8px var(--green);
  animation: blink 1.5s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

#lang-toggle {
  position: fixed; top: 44px; right: 16px; z-index: 200;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: 1px; padding: 5px 10px;
  background: var(--bg2); border: 1px solid var(--border2);
  color: var(--text2); border-radius: 4px; cursor: pointer;
  transition: all 0.15s;
}
#lang-toggle:hover { border-color: var(--green); color: var(--green); }

/* ── layout ── */
.page-wrap { max-width: 860px; margin: 0 auto; padding: 0 28px 80px; }

/* ── header / hero ── */
header {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--border);
  position: relative;
  animation: fadein 0.7s ease both;
}
@keyframes fadein { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }
header::before {
  content: '';
  position: absolute; top: -80px; left: -60px;
  width: 500px; height: 320px;
  background: radial-gradient(ellipse, rgba(74,222,128,0.07) 0%, transparent 65%);
  pointer-events: none; z-index: 0;
}
header > * { position: relative; z-index: 1; }

.logo-row { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
.logo-mark {
  font-family: var(--sans); font-size: 32px; font-weight: 800;
  color: var(--green); letter-spacing: -1px;
  text-shadow: 0 0 40px rgba(74,222,128,0.25);
}
.beta-pill {
  font-size: 10px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--amber);
  background: rgba(251,191,36,0.1); border: 1px solid rgba(251,191,36,0.3);
  padding: 3px 10px; border-radius: 20px;
}
h1 {
  font-family: var(--sans);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 800; line-height: 1.08;
  color: #fff; margin-bottom: 20px; letter-spacing: -1.5px;
}
h1 .accent { color: var(--green); }
.tagline {
  font-size: 14px; color: var(--text2);
  max-width: 560px; line-height: 1.8; margin-bottom: 36px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 20px; }
.hero-sub { font-size: 11px; color: var(--text3); letter-spacing: 1px; }

.btn-primary {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  padding: 12px 24px; background: var(--green); color: #000;
  border: none; border-radius: 4px; cursor: pointer;
  text-decoration: none; transition: all 0.15s; letter-spacing: 0.5px;
}
.btn-primary:hover { background: #6ee89a; transform: translateY(-1px); }
.btn-ghost {
  font-family: var(--mono); font-size: 12px;
  padding: 12px 24px; background: transparent; color: var(--text2);
  border: 1px solid var(--border2); border-radius: 4px;
  cursor: pointer; text-decoration: none; transition: all 0.15s;
}
.btn-ghost:hover { border-color: var(--green); color: var(--text); }

/* ── sections ── */
section { padding: 64px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }
.section-label {
  font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--text3); margin-bottom: 20px;
}
h2 {
  font-family: var(--sans); font-size: clamp(20px, 4vw, 28px);
  font-weight: 700; color: #fff; margin-bottom: 32px; letter-spacing: -0.5px;
}
p { font-size: 13px; color: var(--text2); line-height: 1.8; margin-bottom: 12px; }

/* ── feature grid ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}
.feature-card {
  background: var(--bg1); border: 1px solid var(--border);
  border-radius: 8px; padding: 22px; transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--border2); }
.feature-icon { font-size: 22px; margin-bottom: 14px; }
.feature-title { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.feature-desc { font-size: 11px; color: var(--text2); line-height: 1.65; }

/* ── steps ── */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex; gap: 28px; align-items: flex-start;
  padding: 28px 0; border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--sans); font-size: 36px; font-weight: 800;
  color: var(--green-dim); line-height: 1; flex-shrink: 0; width: 52px;
}
.step-title { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.step-desc { font-size: 12px; color: var(--text2); line-height: 1.7; }

/* ── download ── */
.download-box {
  background: var(--green-bg); border: 1px solid var(--green-dim);
  border-radius: 10px; padding: 36px; margin-top: 24px; text-align: center;
}
.download-box .early-tag {
  display: inline-block; font-size: 10px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--amber);
  background: rgba(251,191,36,0.1); border: 1px solid rgba(251,191,36,0.3);
  padding: 4px 12px; border-radius: 20px; margin-bottom: 16px;
}
.download-box h3 {
  font-family: var(--sans); font-size: 22px; font-weight: 700;
  color: #fff; margin-bottom: 10px;
}
.download-box p {
  font-size: 13px; color: #6a8a6a; margin-bottom: 28px;
  max-width: 440px; margin-left: auto; margin-right: auto;
}
.download-box .btn-primary { font-size: 14px; padding: 14px 32px; }
.download-note { font-size: 10px; color: var(--text3); margin-top: 14px; }
.download-links { margin-top: 20px; font-size: 11px; }
.download-links a { color: var(--text3); text-decoration: none; transition: color 0.1s; }
.download-links a:hover { color: var(--green); }
.sep { color: var(--text3); margin: 0 8px; }

/* ── privacy grid ── */
.privacy-grid { display: flex; flex-direction: column; gap: 0; }
.privacy-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 0; border-bottom: 1px solid var(--border);
  font-size: 13px; color: var(--text2);
}
.privacy-item:last-child { border-bottom: none; }
.priv-icon { color: var(--green); font-size: 14px; flex-shrink: 0; margin-top: 1px; }

/* ── api box ── */
.api-box {
  background: var(--bg1); border: 1px solid var(--border);
  border-left: 3px solid var(--green); border-radius: 6px;
  padding: 24px; margin-top: 20px;
}
.code-block {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 4px; padding: 14px 16px; font-size: 12px;
  color: var(--green); overflow-x: auto; white-space: pre; line-height: 1.6;
}

/* ── footer ── */
footer {
  padding: 40px 0 0;
  font-size: 11px; color: var(--text3);
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 8px;
}
footer a { color: var(--text3); text-decoration: none; }
footer a:hover { color: var(--text2); }

/* ── mobile ── */
@media (max-width: 640px) {
  #beta-bar { font-size: 10px; padding: 7px 12px; letter-spacing: 0.8px; }
  #lang-toggle { top: 40px; right: 10px; font-size: 10px; padding: 4px 8px; }
  .page-wrap { padding: 0 18px 60px; }
  header { padding: 48px 0 40px; }
  .logo-mark { font-size: 26px; }
  h1 { font-size: 30px; letter-spacing: -1px; }
  .tagline { font-size: 13px; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { text-align: center; padding: 13px 16px; font-size: 13px; }
  section { padding: 44px 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 8px; }
  .step { gap: 16px; }
  .step-num { font-size: 26px; width: 38px; }
  .download-box { padding: 24px 18px; }
  footer { flex-direction: column; gap: 6px; text-align: center; }
}