:root {
  --bg: #05060a;
  --bg-alt: #0b0d14;
  --card: #11141f;
  --card-soft: #151827;
  --accent: #4fd1c5;
  --accent-soft: rgba(79, 209, 197, 0.12);
  --accent-strong: #38b2ac;
  --text: #f7fafc;
  --muted: #a0aec0;
  --border-subtle: #1f2433;
  --danger: #f56565;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.35);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #111827 0, #020309 55%, #000 100%);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

/* Layout */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: radial-gradient(circle at top left, #111827 0, #05060a 50%, #020309 100%);
}

.section-intro {
  max-width: 640px;
  color: var(--muted);
  margin: 0 auto 2.5rem;
  text-align: center;
  line-height: 1.6;
}

.section-note {
  margin-top: 2rem;
  text-align: center;
  color: var(--muted);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(5, 6, 10, 0.96), rgba(5, 6, 10, 0.85), transparent);
  border-bottom: 1px solid rgba(79, 209, 197, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: radial-gradient(circle at 20% 0, #4fd1c5, #1a202c 55%, #000 100%);
  color: #0b1120;
  font-size: 0.9rem;
  box-shadow: 0 0 0 1px rgba(79, 209, 197, 0.4), 0 12px 30px rgba(0, 0, 0, 0.7);
}

.logo-text {
  font-size: 0.98rem;
  color: #e2e8f0;
}

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

.nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s ease, opacity 0.18s ease;
}

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

/* Hero */

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.2rem, 3vw, 2.7rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-copy p {
  color: var(--muted);
  max-width: 540px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.75rem 0 1.25rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.hero-meta span {
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.hero-panel {
  display: flex;
  justify-content: flex-end;
}

.hero-card {
  width: 100%;
  max-width: 360px;
  background: radial-gradient(circle at top, #111827 0, #020617 60%, #000 100%);
  border-radius: 18px;
  padding: 1.6rem 1.5rem 1.5rem;
  border: 1px solid rgba(79, 209, 197, 0.18);
  box-shadow: var(--shadow-soft);
}

.hero-card h2 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.hero-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.hero-card li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.35rem;
  color: var(--muted);
}

.hero-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
}

.hero-note {
  font-size: 0.8rem;
  color: var(--muted);
  border-radius: 10px;
  padding: 0.7rem 0.75rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px dashed rgba(148, 163, 184, 0.4);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.3rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #0b1120;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(56, 178, 172, 0.35);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  box-shadow: 0 16px 40px rgba(56, 178, 172, 0.45);
}

.btn-small {
  padding: 0.4rem 0.95rem;
  font-size: 0.8rem;
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border-color: rgba(79, 209, 197, 0.5);
  box-shadow: none;
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.9);
  box-shadow: var(--shadow-subtle);
}

.btn-full-width {
  width: 100%;
}

/* Cards & grids */

.card {
  background: radial-gradient(circle at top, #111827 0, #020617 60%, #000 100%);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--shadow-subtle);
}

.card-ghost {
  background: rgba(15, 23, 42, 0.9);
  border-style: dashed;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

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

.card-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.card-list li {
  margin-bottom: 0.3rem;
}

.tagline {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

/* Workflow */

.workflow {
  display: grid;
  gap: 1.2rem;
  max-width: 720px;
  margin: 0 auto;
}

.workflow-step {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.workflow-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
}

/* About */

.about-list {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.about-list li {
  margin-bottom: 0.5rem;
}

/* Contact */

.contact-grid {
  align-items: flex-start;
}

.contact-form .form-row {
  margin-bottom: 0.9rem;
}

.contact-form label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
  color: #e2e8f0;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.55rem 0.6rem;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(79, 209, 197, 0.6);
}

.form-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0.4rem 0 0.8rem;
}

.contact-info .contact-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-info .contact-note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 1rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(30, 64, 175, 0.6);
  background: radial-gradient(circle at top, #020617 0, #000 70%);
  padding: 1.5rem 0 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  align-items: center;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-meta {
  opacity: 0.9;
}

/* Typography */

h1,
h2,
h3 {
  letter-spacing: 0.01em;
}

h2 {
  font-size: 1.6rem;
  text-align: center;
  margin: 0 0 0.75rem;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-panel {
    justify-content: flex-start;
  }

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

  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav {
    display: none;
  }

  .site-header {
    border-bottom-color: rgba(15, 23, 42, 0.9);
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 3.5rem;
  }

  .section {
    padding: 3.25rem 0;
  }

  .hero-card {
    max-width: 100%;
  }
}