:root {
  color-scheme: dark;
  --bg: #0f172a;
  --bg-gradient: radial-gradient(circle at top left, rgba(124, 58, 237, 0.18), transparent 32%),
    radial-gradient(circle at bottom right, rgba(99, 102, 241, 0.2), transparent 28%);
  --surface: rgba(15, 23, 42, 0.82);
  --surface-strong: rgba(15, 23, 42, 0.96);
  --surface-soft: rgba(15, 23, 42, 0.6);
  --text: #f8fafc;
  --muted: #a5b4fc;
  --accent: #7c3aed;
  --accent-soft: #a78bfa;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 30px 80px rgba(15, 23, 42, 0.32);
  --radius: 28px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f8fc;
  --bg-gradient: radial-gradient(circle at top left, rgba(124, 58, 237, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(99, 102, 241, 0.1), transparent 24%);
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: rgba(255, 255, 255, 1);
  --surface-soft: rgba(247, 248, 252, 0.95);
  --text: #0f172a;
  --muted: #475569;
  --accent: #5b21b6;
  --accent-soft: #c7d2fe;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 30px 80px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', sans-serif;
  background: var(--bg-gradient), var(--bg);
  color: var(--text);
}

button,
a {
  font: inherit;
}

.page-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #7c3aed, #4338ca);
  border-radius: 18px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 20px 50px rgba(124, 58, 237, 0.28);
}

.brand-name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.brand-tag {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s ease, transform 0.3s ease;
}

.nav-links a:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle,
.menu-toggle {
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover,
.menu-toggle:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.14);
}

.menu-toggle {
  display: none;
  padding: 10px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  margin: 4px 0;
  background: var(--text);
  border-radius: 999px;
}

.menu-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.section {
  padding: 80px 0;
}

.nav-links.nav-active {
  display: flex;
  position: fixed;
  top: 84px;
  right: 24px;
  left: 24px;
  flex-direction: column;
  gap: 18px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  z-index: 50;
}

.section-label {
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.8rem;
}

.section-header {
  max-width: 680px;
  margin-bottom: 36px;
}

.section-header h2,
.hero-copy h1 {
  margin: 16px 0 0;
  line-height: 1.05;
}

.section-description,
.hero-description,
.contact-card p {
  color: var(--muted);
}

.hero {
  display: grid;
  gap: 32px;
  padding-top: 40px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  margin: 0;
  max-width: 760px;
}

.eyebrow {
  display: inline-block;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
}

.hero-description {
  max-width: 640px;
  margin-top: 22px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-note {
  margin-top: 18px;
  color: var(--accent-soft);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.button {
  border: none;
  cursor: pointer;
  border-radius: 18px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.button:hover {
  transform: translateY(-2px) scale(1.01);
}

.button-primary {
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  color: #fff;
  padding: 18px 32px;
  box-shadow: 0 20px 40px rgba(124, 58, 237, 0.25);
}

.button-secondary,
.button-link {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  padding: 16px 28px;
}

.button-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  min-height: 350px;
}

.panel-label {
  display: inline-flex;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.16);
  color: #d8dbff;
  font-size: 0.9rem;
}

.hero-panel h2 {
  margin: 24px 0 14px;
  font-size: clamp(2rem, 3vw, 2.6rem);
}

.hero-panel p {
  max-width: 520px;
  line-height: 1.8;
  color: var(--muted);
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.hero-value {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
}

.hero-value strong {
  display: block;
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.cards-grid,
.benefits-grid,
.about-grid {
  display: grid;
  gap: 24px;
}

.cards-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.benefits-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.about-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.service-card,
.benefit-card,
.about-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.service-card:hover,
.benefit-card:hover,
.about-card:hover {
  transform: translateY(-6px);
  border-color: rgba(124, 58, 237, 0.28);
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.22);
  background: rgba(255, 255, 255, 0.08);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  background: rgba(124, 58, 237, 0.15);
  border-radius: 18px;
}

.service-card h3,
.benefit-card h3,
.about-card h3 {
  margin: 0 0 14px;
}

.service-card p,
.benefit-card p,
.about-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 32px;
  padding: 42px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-card h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  margin: 12px 0 16px;
}

.button-large {
  width: 100%;
  min-height: 72px;
}

.footer {
  text-align: center;
  color: var(--muted);
  padding: 28px 0 14px;
}

.animate-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.animate-item.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .contact-card {
    min-height: auto;
  }

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

@media (max-width: 760px) {
  .page-shell {
    padding: 18px;
  }

  .topbar {
    flex-wrap: wrap;
    align-items: center;
  }

  .nav-links {
    display: none;
  }

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

  .button-primary,
  .button-secondary,
  .button-link {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-panel {
    padding: 28px;
  }
}

@media (max-width: 520px) {
  .hero-copy h1 {
    font-size: 2.6rem;
  }

  .hero-description,
  .section-header h2,
  .contact-card h2 {
    font-size: 1rem;
  }

  .service-card,
  .benefit-card,
  .about-card,
  .hero-value,
  .hero-panel,
  .contact-card {
    padding: 22px;
  }
}