:root {
  --color-primary: #4f8cff;
  --color-primary-dark: #3a6fd1;
  --color-secondary: #7b5cff;
  --color-success: #3ccf91;
  --color-warning: #f5a623;
  --color-danger: #ff4f4f;
  --color-info: #4fc3f7;
}

:root {
  color-scheme: light dark;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --fg: #0a0a0a;
  --muted: #555;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --border-subtle: #ddd;
}

html[data-theme="dark"] {
  --bg: #050816;
  --bg-alt: #0b1020;
  --fg: #f5f7ff;
  --muted: #a3acc7;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --border-subtle: #1b2236;
}

:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --fg: #f5f7ff;
  --muted: #a3acc7;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --border-subtle: #1b2236;
  --radius: 10px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #111936 0, #050816 55%, #02030a 100%);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 20px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.logo img {
  width: 32px;
  height: 32px;
}

.main-nav {
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 14px;
}

.main-nav a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--accent-soft);
  color: var(--fg);
}

.btn-primary {
  padding: 8px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, #4f8cff, #7b5cff);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(79, 140, 255, 0.45);
}

.btn-secondary {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  color: var(--fg);
  background: rgba(5, 8, 22, 0.8);
}

.hero {
  max-width: 1120px;
  margin: 40px auto 0;
  padding: 40px 20px 60px;
}

.hero-content {
  max-width: 640px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.1;
  margin-bottom: 16px;
}

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

.hero-actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 20px;
}

.section-alt {
  background: radial-gradient(circle at top left, #151b3a 0, #050816 55%);
}

.section h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.grid-3 article {
  background: rgba(5, 8, 22, 0.9);
  border-radius: var(--radius);
  padding: 18px 16px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.grid-3 h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 18px;
}

.grid-3 p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.pill-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list li {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(5, 8, 22, 0.9);
  font-size: 13px;
  color: var(--muted);
}

.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 30px 20px 40px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.not-found-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.not-found-main h1 {
  font-size: 64px;
  margin: 0;
}

.not-found-main p {
  margin: 0 0 10px;
  color: var(--muted);
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .main-nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
  .hero h1 {
    font-size: 32px;
  }
}
/* Contact Form */
.contact-form {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row label {
  font-size: 14px;
  color: var(--muted);
}

.form-row input,
.form-row textarea {
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: rgba(5, 8, 22, 0.85);
  color: var(--fg);
  font-size: 14px;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 140, 255, 0.25);
}

.form-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: -8px;
}

/* Insight Cards */
.insight-card {
  background: rgba(5, 8, 22, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 20px 18px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-soft);
}

.insight-card h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 20px;
}

.insight-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}