/* ── Reset & base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0a0e1a;
  color: #e8edf5;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
code { font-family: 'JetBrains Mono', monospace; background: rgba(74,158,255,0.12); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; color: #78b3ff; }
em { color: #b8c5d6; font-style: normal; }
::selection { background: rgba(74,158,255,0.3); color: #fff; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ── Hero ──────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: linear-gradient(180deg, #0a0e1a 0%, #0f1729 100%);
  overflow: hidden;
  padding-bottom: 120px;
}
.hero-glow {
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 1000px; height: 1000px;
  background: radial-gradient(circle, rgba(74,158,255,0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.nav { position: relative; z-index: 10; padding: 24px 0; }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px;
}
.logo-icon { font-size: 22px; }
.logo-text { letter-spacing: -0.02em; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 14px; font-weight: 500;
  color: #8892a4; transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }
.nav-cta {
  background: rgba(74,158,255,0.12);
  border: 1px solid rgba(74,158,255,0.3);
  color: #4a9eff !important;
  padding: 8px 18px; border-radius: 8px;
}
.nav-cta:hover { background: rgba(74,158,255,0.2); }

.lang-toggle {
  background: rgba(74,158,255,0.08);
  border: 1px solid rgba(74,158,255,0.2);
  color: #4a9eff;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.lang-toggle:hover {
  background: rgba(74,158,255,0.15);
  border-color: rgba(74,158,255,0.4);
  box-shadow: 0 2px 8px rgba(74,158,255,0.2);
}

.kofi-button {
  display: inline-block;
  margin-top: 24px;
}
.kofi-button img {
  height: auto;
  max-width: 100%;
}

.hero-inner {
  position: relative; z-index: 5;
  max-width: 920px;
  margin: 0 auto;
  padding: 80px 24px 0;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(74,158,255,0.1);
  border: 1px solid rgba(74,158,255,0.25);
  border-radius: 100px;
  color: #78b3ff;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}
.grad {
  background: linear-gradient(135deg, #4a9eff 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  color: #b8c5d6;
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.65;
}
.hero-cta {
  display: flex; gap: 14px; justify-content: center;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600; font-size: 15px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, #4a9eff 0%, #2563eb 100%);
  color: #fff;
  box-shadow: 0 4px 24px rgba(74,158,255,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(74,158,255,0.5);
}
.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: #e8edf5;
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-lg { padding: 18px 40px; font-size: 16px; }

.hero-stats {
  display: inline-flex; align-items: center; gap: 32px;
  padding: 20px 36px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}
.stat-num {
  font-size: 22px; font-weight: 700;
  background: linear-gradient(135deg, #4a9eff 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.stat-label { font-size: 12px; color: #8892a4; margin-top: 2px; }
.stat-sep { width: 1px; height: 32px; background: rgba(255,255,255,0.1); }

/* ── Sections ──────────────────────────────────────────────────────────────── */
section { padding: 100px 0; }
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  text-align: center;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.section-title.left { text-align: left; }
.section-lead {
  text-align: center;
  color: #8892a4;
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto 56px;
}

/* ── Problem / comparison ──────────────────────────────────────────────────── */
.problem { background: #0a0e1a; }
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}
.card {
  padding: 32px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
}
.card-bad { border-color: rgba(231,76,60,0.2); background: rgba(231,76,60,0.03); }
.card-good {
  border-color: rgba(46,204,113,0.3);
  background: linear-gradient(180deg, rgba(46,204,113,0.06) 0%, rgba(46,204,113,0.02) 100%);
}
.card-header { margin-bottom: 20px; }
.card-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  border-radius: 100px;
  margin-bottom: 12px;
}
.tag-bad { background: rgba(231,76,60,0.15); color: #ff8b7a; }
.tag-good { background: rgba(46,204,113,0.15); color: #5eddaf; }
.card h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; }

.checklist { list-style: none; }
.checklist li {
  position: relative;
  padding: 10px 0 10px 32px;
  font-size: 14px;
  color: #c8d2e0;
  border-bottom: 1px dashed rgba(255,255,255,0.05);
}
.checklist li:last-child { border-bottom: none; }
.checklist-bad li::before {
  content: "✕";
  position: absolute; left: 0; top: 10px;
  width: 22px; height: 22px;
  background: rgba(231,76,60,0.15);
  color: #ff8b7a;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}
.checklist-good li::before {
  content: "✓";
  position: absolute; left: 0; top: 10px;
  width: 22px; height: 22px;
  background: rgba(46,204,113,0.15);
  color: #5eddaf;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}
.card-footer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 13px; color: #8892a4;
  font-style: italic;
}

/* ── Features grid ─────────────────────────────────────────────────────────── */
.features { background: linear-gradient(180deg, #0a0e1a 0%, #0d1424 100%); }
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature {
  padding: 28px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(74,158,255,0.25);
  background: rgba(74,158,255,0.03);
}
.feature-icon { font-size: 32px; margin-bottom: 14px; }
.feature h3 {
  font-size: 17px; font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.feature p { font-size: 14px; color: #8892a4; line-height: 1.6; }

/* ── How it works ──────────────────────────────────────────────────────────── */
.how { background: #0a0e1a; }
.steps {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}
.step {
  display: flex; gap: 24px;
  padding: 28px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
}
.step-num {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: linear-gradient(135deg, #4a9eff 0%, #2563eb 100%);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: #fff;
  letter-spacing: -0.02em;
}
.step-body h3 {
  font-size: 18px; font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.step-body p { color: #b8c5d6; font-size: 15px; }

/* ── Why us ────────────────────────────────────────────────────────────────── */
.why { background: linear-gradient(180deg, #0d1424 0%, #0a0e1a 100%); }
.why-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}
.why-text p {
  color: #b8c5d6;
  margin-bottom: 16px;
  font-size: 15px;
}
.why-text p strong { color: #fff; font-weight: 600; }

.diagram {
  display: flex; flex-direction: column; align-items: center;
  gap: 8px;
  padding: 32px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
}
.dgm-box {
  width: 100%;
  padding: 14px 20px;
  background: rgba(74,158,255,0.08);
  border: 1px solid rgba(74,158,255,0.2);
  border-radius: 10px;
  text-align: center;
}
.dgm-source { background: rgba(192,132,252,0.08); border-color: rgba(192,132,252,0.25); }
.dgm-app {
  background: linear-gradient(135deg, rgba(74,158,255,0.18) 0%, rgba(192,132,252,0.18) 100%);
  border-color: rgba(74,158,255,0.4);
  box-shadow: 0 4px 20px rgba(74,158,255,0.15);
}
.dgm-label { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: #8892a4; margin-bottom: 4px; }
.dgm-name { font-size: 14px; font-weight: 600; }
.dgm-arrow { color: #4a9eff; font-size: 20px; opacity: 0.6; }
.dgm-split { display: flex; gap: 60%; }
.dgm-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; }

/* ── Use cases ─────────────────────────────────────────────────────────────── */
.usecases { background: #0a0e1a; padding: 80px 0; }
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 920px;
  margin: 32px auto 0;
}
.usecase {
  padding: 18px 22px;
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  font-size: 14px;
  color: #c8d2e0;
}
.usecase strong { color: #fff; font-weight: 600; }

/* ── Changelog ─────────────────────────────────────────────────────────────── */
.changelog { background: linear-gradient(180deg, #0a0e1a 0%, #0d1424 100%); }
.timeline {
  max-width: 600px;
  margin: 40px auto 0;
  position: relative;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 20px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(74,158,255,0.4) 0%, rgba(74,158,255,0.1) 100%);
}
.timeline-item {
  position: relative;
  padding-left: 80px;
  min-height: 80px;
}
.timeline-marker {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #4a9eff 0%, #c084fc 100%);
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 0;
  box-shadow: 0 0 0 4px #0a0e1a, 0 0 24px rgba(74,158,255,0.4);
  flex-shrink: 0;
}
.timeline-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.timeline-date {
  font-size: 11px;
  font-weight: 700;
  color: #4a9eff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.timeline-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin: 0;
}
.timeline-desc {
  font-size: 13px;
  color: #8892a4;
  line-height: 1.5;
  margin: 0;
}

/* ── Download ──────────────────────────────────────────────────────────────── */
.download { background: linear-gradient(180deg, #0a0e1a 0%, #0d1424 100%); padding: 100px 0; }
.download-card {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 40px;
  background: linear-gradient(135deg, rgba(74,158,255,0.08) 0%, rgba(192,132,252,0.08) 100%);
  border: 1px solid rgba(74,158,255,0.25);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(74,158,255,0.15);
}
.download-icon { font-size: 48px; margin-bottom: 16px; }
.download-card h2 { font-size: 36px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 12px; }
.download-card p { color: #b8c5d6; margin-bottom: 32px; font-size: 16px; }
.download-meta {
  margin-top: 24px;
  font-size: 13px;
  color: #8892a4;
  line-height: 1.7;
}

/* ── Footer ────────────────────────────────────────────────────────────────── */
.footer {
  background: #060912;
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 20px;
}
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; }
.footer-tag { font-size: 13px; color: #8892a4; margin-top: 4px; }
.footer-right { text-align: right; }
.footer-author { font-size: 14px; color: #b8c5d6; }
.footer-author a { color: #4a9eff; font-weight: 600; }
.footer-author a:hover { text-decoration: underline; }
.footer-meta { font-size: 12px; color: #5a6478; margin-top: 4px; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .comparison { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .usecase-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 16px; padding: 16px 24px; }
  .stat-sep { display: none; }
}
@media (max-width: 600px) {
  section { padding: 64px 0; }
  .grid { grid-template-columns: 1fr; }
  .hero-inner { padding-top: 48px; }
  .download-card { padding: 40px 24px; }
  .download-card h2 { font-size: 28px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-right { text-align: center; }
}