:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #1a1a2e;
  --color-text-muted: #6c757d;
  --color-accent: #8e0000;
  --color-accent-hover: #a50000;
  --color-border: #e9ecef;
  --color-card: #ffffff;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --transition: 0.2s ease;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0d1117;
    --color-bg-alt: #161b22;
    --color-text: #e6edf3;
    --color-text-muted: #8b949e;
    --color-accent: #c92a2a;
    --color-accent-hover: #e03131;
    --color-border: #30363d;
    --color-card: #161b22;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  --color-bg: #0d1117;
  --color-bg-alt: #161b22;
  --color-text: #e6edf3;
  --color-text-muted: #8b949e;
  --color-accent: #c92a2a;
  --color-accent-hover: #e03131;
  --color-border: #30363d;
  --color-card: #161b22;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 48px;
  width: auto;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

/* Hero */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero .accent {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 3rem;
}

/* About */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-content > p {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.feature {
  text-align: center;
  padding: 2rem;
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Clients */
.client-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.client-logo {
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.client-logo img {
  max-width: 130px;
  max-height: 50px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all var(--transition);
}

.client-logo img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

.client-logo img.invert-logo {
  filter: grayscale(100%) invert(1) brightness(1.7) contrast(0.5);
  opacity: 0.6;
}

.client-logo img.invert-logo:hover {
  filter: invert(1) brightness(0.3);
  opacity: 1;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.team-member {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.member-info {
  padding: 2rem;
  text-align: center;
}

.member-info h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.member-role {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.member-bio {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.member-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.member-links a {
  color: var(--color-text);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  transition: all var(--transition);
}

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

/* Contact */
.contact-content {
  text-align: center;
}

.contact-note {
  color: var(--color-text-muted);
  margin-top: 1rem;
  font-size: 0.875rem;
}

/* Footer */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer-support a {
  color: var(--color-accent);
  text-decoration: none;
}

.footer-support a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 8rem 0 4rem;
  }

  .section {
    padding: 3rem 0;
  }

  .about-features {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}