:root {
  --bg: #0b1120;
  --bg-alt: #111c33;
  --ink: #e6edf6;
  --ink-soft: #93a3bb;
  --line: #1f2c44;
  --accent: #3b82f6;
  --accent-dark: #60a5fa;
  --accent-soft: rgba(59,130,246,.14);
  --header-bg: rgba(11,17,32,.82);
  --tag-accent-bg: rgba(255,255,255,.06);
  --radius: 14px;
  --maxw: 1080px;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --ink: #0f172a;
  --ink-soft: #475569;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff4ff;
  --header-bg: rgba(255,255,255,.85);
  --tag-accent-bg: rgba(255,255,255,.6);
  --shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.05);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}

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

a { color: inherit; text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: background .15s ease, transform .05s ease;
  font-size: 15px;
  white-space: nowrap;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 16px; font-size: 14px; min-width: 170px; }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--accent-soft); border-color: var(--accent); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.brand {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.brand-accent { color: var(--accent); }
.brand-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.brand-sep {
  display: inline-block;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  margin: 0 5px;
  vertical-align: 0.18em;
}
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
  color: var(--ink-soft);
}
.nav-links a:hover { color: var(--ink); }
.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}
.lang-toggle {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--ink-soft);
  font-family: "JetBrains Mono", monospace;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  color: var(--ink-soft);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: inline; }

.hero {
  padding: 96px 0 72px;
  background:
    radial-gradient(60% 120% at 85% -10%, var(--accent-soft) 0%, transparent 60%),
    var(--bg);
}
.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--accent);
  margin: 0 0 16px;
}
.hero-title {
  font-size: clamp(34px, 5.5vw, 56px);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 800;
  margin: 0 0 18px;
  max-width: 18ch;
}
.hero-sub {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-soft);
  margin: 0 0 36px;
  max-width: 56ch;
}
.hero-claims {
  list-style: none;
  padding: 0;
  margin: 0 0 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px 48px;
}
.hero-claims li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink-soft);
  font-size: 15px;
}
.claim-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -.02em;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 12px;
}
.section-lead {
  font-size: 18px;
  color: var(--ink-soft);
  margin: 0 0 44px;
  max-width: 60ch;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: #cbd5e1;
  box-shadow: 0 4px 8px rgba(15,23,42,.06), 0 16px 40px rgba(15,23,42,.08);
}
.card h3 { margin: 0 0 10px; font-size: 19px; letter-spacing: -.01em; }
.card p { margin: 0 0 18px; color: var(--ink-soft); font-size: 15px; }
.card-accent {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), var(--bg) 70%);
}
.tags {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tags li {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 4px 10px;
  border-radius: 999px;
}
.card-accent .tags li { background: var(--tag-accent-bg); }

.stack-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.stack-list li {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: var(--shadow);
}

.why-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
}
.why-grid .section-lead { margin-bottom: 0; }
.why-list {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 40px;
}
.why-list h3 {
  margin: 0 0 6px;
  font-size: 18px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.why-list h3::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--accent);
  flex: none;
}
.why-list p { margin: 0; color: var(--ink-soft); font-size: 15px; }

.section-cta { background: var(--bg-alt); }
.contact-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
}
.contact-direct { display: flex; flex-direction: column; gap: 16px; }
.contact-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow);
  transition: border-color .12s ease;
}
.contact-link:hover { border-color: var(--accent); }
.contact-label {
  font-size: 13px;
  color: var(--ink-soft);
  font-family: "JetBrains Mono", monospace;
}
.contact-value { font-weight: 700; font-size: 17px; }

.contact-form {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}
.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}
.contact-form input,
.contact-form textarea {
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.form-note {
  margin: 0;
  font-size: 14px;
  color: var(--accent-dark);
  font-weight: 600;
}

.case-card { display: flex; flex-direction: column; gap: 14px; }
.case-ctx {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--line);
  padding: 5px 12px;
  border-radius: 999px;
  align-self: flex-start;
}
.case-line {
  margin: 0;
  display: grid;
  gap: 4px;
  color: var(--ink-soft);
  font-size: 15px;
}
.case-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink);
}

.steps {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.step-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.step h3 { margin: 10px 0 8px; font-size: 18px; letter-spacing: -.01em; }
.step p { margin: 0; color: var(--ink-soft); font-size: 15px; }

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 820px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 22px;
  box-shadow: var(--shadow);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 0;
  font-weight: 600;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: "JetBrains Mono", monospace;
  font-size: 20px;
  color: var(--accent);
  flex: none;
  transition: transform .15s ease;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p {
  margin: 0;
  padding: 0 0 20px;
  color: var(--ink-soft);
  font-size: 15px;
  max-width: 70ch;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--ink-soft);
  font-size: 14px;
}
.footer-legal {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr; gap: 28px; }
  .why-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .hero { padding: 64px 0 48px; }
  .section { padding: 56px 0; }
  .grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-claims { gap: 24px 32px; }
  .nav { gap: 10px; }
  .nav-right { gap: 8px; }
  .brand { font-size: 16px; }
  .nav-right .btn-sm { display: none; }
  .eyebrow { font-size: clamp(9px, 2.7vw, 12px); letter-spacing: 0; }
}