@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  --color-bg: #0a0a0a;
  --color-bg-glass: rgba(24, 25, 28, 0.6);
  --color-bg-glass-strong: rgba(24, 25, 28, 0.85);
  --color-accent: #1e90ff;
  --color-accent-glow: #3abfff;
  --color-danger: #ff4d4f;
  --color-text: #e0e7ff;
  --color-muted: #b8d8f8;
  --radius: 18px;
  --shadow-soft: 0 2px 24px #1e90ff11;
  --font-sans: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* --- Base & Typography --- */
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  overflow-x: hidden;
  position: relative;
}
h1, h2, h3 {
  color: #fff;
  font-weight: 800;
}
p {
  color: var(--color-muted);
}
a {
  color: var(--color-accent-glow);
  text-decoration: none;
  font-weight: 600;
}
a:hover {
  text-decoration: underline;
}

/* --- Aurora Background Effect --- */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 10% 20%, rgba(30, 144, 255, 0.15), transparent 30%),
              radial-gradient(circle at 90% 80%, rgba(58, 191, 255, 0.15), transparent 40%);
  z-index: -1;
}

/* --- Header --- */
.onboarding-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 24, 0.7);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  box-shadow: 0 2px 24px #1e90ff11;
  border-bottom: 1.5px solid rgba(30, 144, 255, 0.1);
}
.onboarding-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
}
.onboarding-logo .logo-accent {
  color: var(--color-accent-glow);
}
.onboarding-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.onboarding-nav a, .onboarding-btn {
  font-weight: 600;
  font-size: 1rem;
  transition: color 0.2s;
}
.onboarding-btn {
  background: none;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.5rem 1rem;
  border-radius: 99px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}
.onboarding-btn:hover {
  background-color: var(--color-accent);
  color: #fff;
}

/* --- Hero Section --- */
.onboarding-hero {
  text-align: center;
  padding: 6rem 2rem;
}
.headline {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.highlight {
  color: var(--color-accent-glow);
  text-shadow: 0 0 12px var(--color-accent-glow), 0 0 24px var(--color-accent);
}
.subtext {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2.5rem auto;
}

/* --- Sections & Cards --- */
.onboarding-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.onboarding-section h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
}
.features-grid, .steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.feature-card, .step-card {
  background: rgba(22, 27, 34, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(48, 54, 61, 0.5);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover, .step-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
  border-color: rgba(88, 135, 255, 0.3);
}
.feature-icon, .step-number {
  font-size: 2rem;
  margin-bottom: 1rem;
  line-height: 1;
}
.feature-card h3, .step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}
.step-number {
  background: var(--color-accent-glow);
  color: var(--color-bg);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem auto;
}

/* --- Modals --- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 18, 32, 0.65);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.modal[hidden] {
  display: none !important;
}
.modal:not([hidden]) {
  display: flex;
}
.glassmorphic-container {
  background: var(--color-bg-glass-strong);
  backdrop-filter: blur(14px);
  border-radius: var(--radius);
  box-shadow: 0 0 40px 8px #1e90ff33;
  border: 1.5px solid #1e90ff33;
  position: relative;
  text-align: left;
}
.modal-close-x {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  color: var(--color-accent-glow);
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}
.neon-glow-heading {
  color: var(--color-accent-glow);
  font-weight: 800;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  text-align: center;
  text-shadow: 0 0 12px var(--color-accent-glow), 0 0 24px var(--color-accent);
}

/* --- Forms --- */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-group {
  position: relative;
}
.auth-input {
  background: rgba(13, 17, 23, 0.8);
  border: 1.5px solid #222b3a;
  color: var(--color-text);
  border-radius: 12px;
  font-size: 1rem;
  font-family: var(--font-sans);
  padding: 1rem;
  outline: none;
  transition: border 0.2s, box-shadow 0.2s;
  width: 100%;
  box-sizing: border-box;
}
.auth-input:focus {
  border-color: var(--color-accent-glow);
  box-shadow: 0 0 0 2px rgba(58, 191, 255, 0.3);
}
.form-label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  font-size: 1rem;
  color: var(--color-muted);
  pointer-events: none;
  transition: all 0.2s;
  background: var(--color-bg-glass-strong);
  padding: 0 0.25rem;
}
.auth-input:focus + .form-label,
.auth-input:not(:placeholder-shown) + .form-label {
  top: -0.6rem;
  left: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-accent-glow);
}
.password-wrapper { position: relative; }
.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.3rem;
  color: var(--color-accent-glow);
  cursor: pointer;
}
.strength-meter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.strength-bar {
  flex-grow: 1;
  height: 6px;
  background: #333;
  border-radius: 6px;
  overflow: hidden;
}
.strength-fill {
  height: 100%;
  width: 0%;
  border-radius: 6px;
  transition: width 0.3s ease, background-color 0.3s ease;
}
.cta {
  background: linear-gradient(135deg, var(--color-accent-glow), var(--color-accent));
  color: #fff;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s;
  box-shadow: 0 0 16px rgba(58, 191, 255, 0.2);
  border: none;
  cursor: pointer;
  margin-top: 1rem;
}
.cta:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }
.cta:not(:disabled):hover {
  box-shadow: 0 0 32px rgba(58, 191, 255, 0.5);
  transform: translateY(-2px);
}
.redirect { text-align: center; margin-top: 1.5rem; }
.error-message { min-height: 1.2em; color: var(--color-danger); font-size: 0.9rem; }

/* --- Footer --- */
.onboarding-footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-muted);
  opacity: 0.7;
}

/* --- Scroll Fade-in Animation --- */
.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .features-grid, .steps-grid { grid-template-columns: 1fr; }
  .onboarding-header { padding: 1rem; }
  .onboarding-nav { display: none; } /* Simplified for this example, consider a hamburger menu */
}
@media (max-width: 600px) {
  .headline { font-size: 2.5rem; }
  .onboarding-section h2 { font-size: 2rem; }
}