:root {
  --color-primary: #2a4bd7;
  --color-accent: #ff7a59;
  --color-bg: #f5f7fb;
  --color-text: #1c1f2a;
  --color-cta: #2ec4b6;
  --color-surface: #ffffff;
  --color-muted: #6b7280;
  --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(245, 247, 251, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(28, 31, 42, 0.08);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.05rem;
}

.brand span {
  color: var(--color-primary);
}

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

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a:focus {
  background: var(--color-primary);
  color: #fff;
}

.hero {
  padding: 80px 0 60px;
}

.hero-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 3.2rem);
  margin-bottom: 16px;
}

.hero p {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.button.primary {
  background: var(--color-cta);
  color: #042d2b;
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.button.primary:hover,
.button.secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.section {
  padding: 60px 0;
}

.section-title {
  font-size: 1.6rem;
  margin-bottom: 24px;
}

.card-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--color-surface);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 14px;
}

.card h3 {
  font-size: 1.1rem;
}

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

.tool-card {
  background: linear-gradient(135deg, rgba(42, 75, 215, 0.08), rgba(46, 196, 182, 0.12));
  border: 1px solid rgba(42, 75, 215, 0.15);
}

.highlight {
  color: var(--color-primary);
  font-weight: 600;
}

.email-capture {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  gap: 18px;
}

.email-capture input {
  padding: 12px 16px;
  border-radius: 999px;
  border: none;
  width: 100%;
  font-size: 1rem;
}

.email-capture button {
  background: var(--color-accent);
  color: #2a140c;
}

.form-grid {
  display: grid;
  gap: 18px;
}

.form-grid label {
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

select,
textarea,
input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(28, 31, 42, 0.15);
  background: #fff;
  font-size: 1rem;
}

.output-box {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 12px;
}

.output-box p {
  color: var(--color-muted);
}

.inline-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer {
  padding: 32px 0;
  border-top: 1px solid rgba(28, 31, 42, 0.08);
  margin-top: 40px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(46, 196, 182, 0.15);
  color: #0c3b35;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
}

.structure-diagram {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(42, 75, 215, 0.08);
  font-weight: 600;
  text-align: center;
}

@media (max-width: 768px) {
  .nav-links {
    gap: 10px;
  }

  .navbar-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero {
    padding: 60px 0 40px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1320;
    --color-surface: #171b2b;
    --color-text: #f1f5ff;
    --color-muted: #aab0c4;
  }

  body {
    background: var(--color-bg);
  }

  .navbar {
    background: rgba(15, 19, 32, 0.95);
  }

  select,
  textarea,
  input[type="text"] {
    background: #121625;
    color: var(--color-text);
    border-color: rgba(241, 245, 255, 0.2);
  }

  .email-capture button {
    color: #2a140c;
  }
}