:root {
  --primary-blue: #0A62A6;
  --dark-bg: #0F172A;
  --darker-bg: #020617;
  --text-light: #F8FAFC;
  --text-muted: #94A3B8;
  --accent-cyan: #38BDF8;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--darker-bg);
  color: var(--text-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 5%;
  position: fixed;
  width: 100%;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--glass-border);
}

.logo-img {
  height: 50px;
  width: auto;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 5%;
  background: radial-gradient(circle at center, var(--dark-bg) 0%, var(--darker-bg) 100%);
}

.hero-content {
  max-width: 800px;
  animation: fadeIn 1s ease-out;
}

h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

p.subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

/* Buttons */
.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--primary-blue);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.cta-button:hover {
  background: transparent;
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

/* Glass Cards */
.glass-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 3rem;
  backdrop-filter: blur(10px);
  margin-bottom: 2rem;
}

/* Diagnostic Section */
.diagnostic-container {
  padding: 120px 5% 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.question-list {
  margin-bottom: 2rem;
}

.question-list li {
  margin-bottom: 1rem;
  color: var(--text-muted);
  list-style-type: none;
  padding-left: 1.5rem;
  position: relative;
}

.question-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.highlight {
  color: var(--accent-cyan);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}