/* MindFlow — Microsoft Fluent–inspired light theme */

:root {
  --accent: #0078d4;
  --accent-hover: #106ebe;
  --accent-light: #deecf9;
  --bg-page: #faf9f8;
  --bg-surface: #ffffff;
  --bg-subtle: #f3f2f1;
  --text-primary: #242424;
  --text-secondary: #616161;
  --border: #e1dfdd;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-width: 1080px;
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Header */

.site-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
}

.brand:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.site-nav a {
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-light);
  text-decoration: none;
}

/* Main layout */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* Hero */

.hero {
  text-align: center;
  padding: 3rem 1rem 3.5rem;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-page) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: 3rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.hero-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.25rem;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero .tagline {
  margin: 0 0 1.25rem;
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--accent);
  font-weight: 600;
}

.hero .description {
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--text-secondary);
  font-size: 1.0625rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Sections */

.section {
  margin-bottom: 3rem;
}

.section h2 {
  margin: 0 0 1.25rem;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section-intro {
  color: var(--text-secondary);
  margin: 0 0 1.5rem;
  max-width: 720px;
}

/* Feature grid */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #c8c6c4;
}

.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
  color: var(--accent);
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Download section */

.download-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.download-section p {
  color: var(--text-secondary);
  margin: 0 0 1.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  min-width: 180px;
  justify-content: center;
}

.store-badge strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.9375rem;
}

/* Contact */

.contact-card {
  background: var(--accent-light);
  border: 1px solid #c7e0f4;
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  max-width: 480px;
}

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

.contact-card a {
  font-weight: 600;
}

/* Legal pages */

.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.page-header .updated {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.legal-content h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
}

.legal-content ul {
  padding-left: 1.25rem;
  margin: 0.75rem 0;
}

.legal-content li {
  margin: 0.375rem 0;
}

/* Footer */

.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  font-weight: 600;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

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

.footer-copy {
  width: 100%;
  margin: 0.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* Responsive */

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
  }

  .site-nav a {
    flex: 1;
    text-align: center;
  }

  .hero {
    padding: 2rem 1rem 2.5rem;
  }

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