:root {
  --bg: #050608;
  --bg-elevated: #11131a;
  --bg-elevated-soft: #161925;
  --accent: #4fd4ff;
  --accent-soft: rgba(79,212,255,0.12);
  --text-main: #f7f7fb;
  --text-muted: #a3a6b8;
  --border-subtle: #242636;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 45px rgba(0,0,0,0.55);
  --spacing: 1.5rem;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #151826 0, #050608 55%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, 100% - 2rem);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid rgba(255,255,255,0.04);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: radial-gradient(circle at top, rgba(21,24,38,0.95), rgba(5,6,8,0.96));
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.nav a {
  color: var(--text-muted);
  padding: 0.25rem 0.1rem;
}

.nav a:hover {
  color: var(--text-main);
}

.btn-nav {
  border-radius: 999px;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255,255,255,0.18);
  background: linear-gradient(135deg, rgba(79,212,255,0.16), rgba(79,212,255,0.02));
  color: var(--text-main);
}

.btn-nav:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin: 0 0 1rem;
}

.hero-copy p {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 1rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 550;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #83ffe4);
  color: #020308;
  box-shadow: 0 18px 45px rgba(79,212,255,0.45);
}

.btn-primary:hover {
  text-decoration: none;
  box-shadow: 0 22px 55px rgba(79,212,255,0.6);
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255,255,255,0.16);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.hero-note {
  font-size: 0.85rem;
  padding: 0.85rem 1rem;
  background: radial-gradient(circle at top left, rgba(79,212,255,0.16), rgba(11,12,18,0.95));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-muted);
}

.hero-meta {
  display: grid;
  gap: 0.9rem;
}

.stat-card {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-lg);
  background: rgba(9,10,16,0.96);
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: var(--shadow-soft);
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 650;
}

.strip {
  padding: 2.4rem 0;
  background: radial-gradient(circle at top, rgba(28,32,52,0.95), rgba(5,6,8,1));
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.strip-alt {
  background: radial-gradient(circle at bottom, rgba(15,70,92,0.35), rgba(5,6,8,1));
}

.strip-inner h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.strip-inner p {
  margin: 0;
  color: var(--text-muted);
  max-width: 720px;
}

.grid-section {
  padding: 3rem 0;
}

.grid-section h2 {
  text-align: left;
  margin-bottom: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.3rem;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

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

.pill-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pill-list li {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(6,10,18,0.95);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.page-header {
  padding: 2.6rem 0 1.8rem;
}

.page-header h1 {
  margin: 0 0 0.6rem;
}

.page-header p {
  margin: 0;
  color: var(--text-muted);
  max-width: 720px;
}

.page-section {
  padding: 1.5rem 0 0.5rem;
}

.page-section h2 {
  margin-top: 0;
}

.page-section p {
  color: var(--text-muted);
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: 1rem;
}

.list-grid h3 {
  margin-top: 0;
}

.list-grid ul {
  margin-top: 0.4rem;
}

ul {
  color: var(--text-muted);
}

ul li + li {
  margin-top: 0.25rem;
}

.mt-lg {
  margin-top: 1.5rem;
}

.case-study {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-bottom: 2.2rem;
  margin-bottom: 1.8rem;
}

.case-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.article-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 1.3rem 1.4rem;
  background: var(--bg-elevated-soft);
  box-shadow: var(--shadow-soft);
  margin-bottom: 1.2rem;
}

.article-card h2 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.article-card p {
  margin-top: 0;
  color: var(--text-muted);
}

.article-meta {
  font-size: 0.8rem;
  margin-top: 0.8rem;
  color: var(--text-muted);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
  gap: 2rem;
}

.about-aside {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 1.2rem 1.3rem;
  border: 1px solid var(--border-subtle);
}

.about-aside ul {
  padding-left: 1.2rem;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(0, 1.2fr);
  gap: 1.8rem;
}

.contact-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.5rem 1.6rem;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

input,
textarea {
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(5,6,10,0.96);
  color: var(--text-main);
  font: inherit;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(79,212,255,0.5);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.checkbox-group input {
  margin-right: 0.3rem;
}

.contact-aside {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-aside h3 {
  color: var(--text-main);
}

.site-footer {
  padding: 1.5rem 0 1.8rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 2.5rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text-main);
}

/* Responsive */
@media (max-width: 880px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-layout,
  .contact-section,
  .list-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 2.4rem;
  }

  .hero-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer {
    padding-bottom: 2.2rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}