:root {
  --primary: #17a2b8;
  --primary-dark: #138496;
  --dark: #1e293b;
  --light: #f8fafc;
  --bg: var(--dark);
  --text: var(--light);
  --card-bg: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] {
  --bg: #f8f9fa;
  --text: #212529;
  --card-bg: rgba(0, 0, 0, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

.theme-toggle {
  position: static;
  top: auto;
  right: auto;
  background: var(--card-bg);
  border: none;
  color: var(--text);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s;
  z-index: 1000;
}

.theme-toggle:hover {
  transform: rotate(30deg);
}

.top-buttons {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.5rem;
  z-index: 1000;
}

.admin-button {
  background: var(--card-bg);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.admin-button:hover {
  transform: translateY(-2px);
  background: var(--primary);
  color: white;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(23, 162, 184, 0.1) 0%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect width="100" height="100" fill="none"/><path d="M0 0h100v100H0z" fill="none"/><path d="M20 20h60v60H20z" fill="%2317a2b8" fill-opacity="0.1"/></svg>') repeat;
  opacity: 0.1;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

h1 {
  font-size: 4rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #20c997 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: var(--text);
  opacity: 0.8;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  background: var(--primary-dark);
}

.features {
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  .subtitle {
    font-size: 1.2rem;
  }
}