:root {
  --bg: #08111f;
  --bg-soft: #101b2d;
  --panel: #132238;
  --panel-2: #0f1a2b;
  --text: #eef4ff;
  --muted: #adc0d8;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #59d7ff;
  --accent-2: #8cffc1;
  --warning: #ffd166;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  --radius: 20px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(89, 215, 255, 0.18), transparent 30%),
    radial-gradient(circle at 85% 8%, rgba(140, 255, 193, 0.12), transparent 26%),
    linear-gradient(180deg, var(--bg), #060b14 70%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(8, 17, 31, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.3px;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background:
    linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  color: #06101d;
  font-weight: 900;
  box-shadow: 0 8px 26px rgba(89, 215, 255, 0.28);
}

.logo-word {
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 10px;
  font-size: 1.1rem;
}

.hero {
  padding: 86px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--accent-2);
  background: rgba(140, 255, 193, 0.1);
  border: 1px solid rgba(140, 255, 193, 0.18);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.88rem;
  margin-bottom: 18px;
}

h1, h2, h3 {
  line-height: 1.08;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 5rem);
  letter-spacing: -0.06em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1.25rem;
}

.lead {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 750;
  border: 1px solid var(--line);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #06101d;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

.btn-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.hero-card {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -2px;
  background:
    linear-gradient(90deg, transparent, rgba(89, 215, 255, 0.16), transparent);
  pointer-events: none;
}

.equation-box {
  background: rgba(4, 10, 18, 0.72);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  margin: 14px 0;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  color: #d6f7ff;
  font-size: 0.95rem;
  overflow-x: auto;
}

.card-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.card-list div {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255,255,255,0.045);
  border: 1px solid var(--line);
  color: var(--muted);
}

.section {
  padding: 58px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 28px;
  margin-bottom: 26px;
}

.section-head p {
  color: var(--muted);
  max-width: 700px;
  margin: 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: rgba(19, 34, 56, 0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 12px 35px rgba(0,0,0,0.18);
}

.card p {
  color: var(--muted);
  margin: 0 0 14px;
}

.card ul {
  color: var(--muted);
  padding-left: 20px;
  margin: 10px 0 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.tag {
  color: #cfefff;
  background: rgba(89, 215, 255, 0.09);
  border: 1px solid rgba(89, 215, 255, 0.17);
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.82rem;
}

.project-card {
  position: relative;
  overflow: hidden;
}

.project-card .status {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent-2);
  font-size: 0.84rem;
  font-weight: 700;
}

.case-note {
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  color: var(--muted);
  background: rgba(89, 215, 255, 0.06);
  border-radius: 0 12px 12px 0;
  margin-top: 14px;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  background: rgba(255,255,255,0.04);
}

.metric strong {
  display: block;
  font-size: 1.45rem;
  color: var(--text);
}

.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}

.cta {
  border: 1px solid rgba(89, 215, 255, 0.22);
  background:
    radial-gradient(circle at 20% 0%, rgba(89, 215, 255, 0.18), transparent 35%),
    rgba(19, 34, 56, 0.86);
  border-radius: 28px;
  padding: 34px;
  box-shadow: var(--shadow);
}

.footer {
  margin-top: 50px;
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.page-title {
  padding: 58px 0 28px;
}

.page-title h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(19, 34, 56, 0.55);
}

.table th,
.table td {
  padding: 14px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  vertical-align: top;
}

.table th {
  color: var(--text);
  background: rgba(255,255,255,0.05);
}

.notice {
  border: 1px solid rgba(255, 209, 102, 0.24);
  background: rgba(255, 209, 102, 0.08);
  color: #ffe7a1;
  border-radius: 16px;
  padding: 14px 16px;
}

.contact-card {
  display: grid;
  gap: 12px;
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--muted);
}

.contact-line strong {
  color: var(--text);
  min-width: 110px;
}

.simple-form {
  display: grid;
  gap: 12px;
}

.simple-form input,
.simple-form textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(4, 10, 18, 0.7);
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
}

.simple-form textarea {
  min-height: 150px;
}

.small {
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 820px) {
  .hero-grid,
  .grid-2,
  .grid-3,
  .feature-strip {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }

  .mobile-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 74px;
    left: 20px;
    right: 20px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(8, 17, 31, 0.96);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: grid;
  }
}