/* Reset browser spacing */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0c14;
  --bg-elevated: #12151f;
  --bg-card: rgba(255, 255, 255, 0.035);
  --ink: #f3f5f8;
  --ink-dim: #a9b0c0;
  --ink-faint: #6b7386;
  --line: rgba(255, 255, 255, 0.09);
  --accent: #7c9cff;
  --accent-2: #7cf0d2;
  --accent-3: #ff7ce0;
  --accent-4: #ffb86c;
  --accent-soft: rgba(124, 156, 255, 0.14);
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  position: relative;
  overflow-x: hidden;
}

/* ---------- Ambient background ---------- */
#neural-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(124, 156, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 156, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

.glow-a {
  width: 560px;
  height: 560px;
  top: -180px;
  left: -160px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
}

.glow-b {
  width: 520px;
  height: 520px;
  top: 30vh;
  right: -220px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  opacity: 0.2;
}

.glow-c {
  width: 460px;
  height: 460px;
  bottom: -160px;
  left: 10vw;
  background: radial-gradient(circle, var(--accent-3), transparent 70%);
  opacity: 0.16;
}

/* ---------- Nav ---------- */
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(10, 12, 20, 0.6);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
}

.nav-logo {
  border-radius: 7px;
  display: block;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  padding: 8px;
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg) !important;
  font-weight: 700 !important;
}

.nav-cta:hover {
  background: var(--accent-2);
}

/* ---------- Layout ---------- */
.page {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 64px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 96px;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  scroll-margin-top: 90px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(124, 240, 210, 0.08);
  border: 1px solid rgba(124, 240, 210, 0.25);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 20px;
}

h1 {
  font-size: clamp(2.3rem, 5.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 20%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-dim);
  margin-bottom: 24px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.education {
  list-style: none;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.education li {
  font-size: 0.82rem;
  color: var(--ink-faint);
  letter-spacing: 0.01em;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
}

.chip {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-dim);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- Buttons ---------- */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.cta-button:hover {
  background: var(--accent-2);
  transform: translateY(-1px);
  box-shadow: 0 10px 30px -10px rgba(124, 240, 210, 0.5);
}

.cta-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.cta-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  box-shadow: none;
  color: var(--ink);
}

.cta-arrow {
  transition: transform 0.15s ease;
}

.cta-button:hover .cta-arrow {
  transform: translateX(3px);
}

/* ---------- Generic section scaffolding ---------- */
.section {
  scroll-margin-top: 90px;
}

.section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  color: var(--accent-2);
  background: linear-gradient(135deg, var(--accent-soft), rgba(124, 240, 210, 0.1));
  border: 1px solid var(--line);
}

.section-head h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-lead {
  color: var(--ink-dim);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 14px;
}

/* ---------- Use case cards ---------- */
.card-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.use-case-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  transition: border-color 0.15s ease, transform 0.15s ease, background-color 0.15s ease;
}

.use-case-card:hover {
  border-color: rgba(124, 156, 255, 0.4);
  background: rgba(124, 156, 255, 0.05);
  transform: translateY(-2px);
}

.uc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: 14px;
}

.use-case-card h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.005em;
}

.use-case-card p {
  color: var(--ink-faint);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ---------- Case study ---------- */
.case-study {
  margin-top: 24px;
  background: linear-gradient(180deg, var(--bg-elevated), rgba(18, 22, 31, 0.6));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.8);
  position: relative;
  overflow: hidden;
}

.case-study::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at 0% 0%, rgba(124, 156, 255, 0.08), transparent 60%);
  pointer-events: none;
}

.project-card-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  position: relative;
}

.project-kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 10px;
}

.case-study h3 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.project-desc {
  color: var(--ink-dim);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 26px;
  position: relative;
  max-width: 640px;
}

.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 26px;
  position: relative;
}

.cs-block h4 {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 8px;
}

.cs-block p {
  color: var(--ink-faint);
  font-size: 0.86rem;
  line-height: 1.6;
}

.cs-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  position: relative;
}

.cs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-faint);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-logo {
  border-radius: 5px;
  opacity: 0.7;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 12, 20, 0.97);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 10px 24px 18px;
    display: none;
  }

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

  .nav-links a {
    width: 100%;
    padding: 10px 0;
  }

  .nav-cta {
    text-align: center;
    margin-top: 6px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .cs-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .page {
    padding: 48px 16px 32px;
    gap: 72px;
  }

  .case-study {
    padding: 24px 20px;
  }
}