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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  background-color: #2c3e50;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-links a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.nav-links a:hover {
  background-color: rgba(255,255,255,0.1);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-primary:hover {
  background-color: #2980b9;
}

.btn-secondary {
  background-color: #95a5a6;
  color: white;
}

.btn-secondary:hover {
  background-color: #7f8c8d;
}

.btn-danger {
  background-color: #e74c3c;
  color: white;
}

.btn-danger:hover {
  background-color: #c0392b;
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.2rem;
}

/* Hero Section */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 3rem 0;
}

.hero-content {
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1.3rem;
  color: #7f8c8d;
  margin-bottom: 2rem;
}

.warning-box {
  background-color: #fff3cd;
  border: 2px solid #ffc107;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem auto;
  max-width: 800px;
  color: #856404;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.feature h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.cta {
  margin-top: 2rem;
}

/* Login Page */
.login-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.login-box {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  max-width: 500px;
  width: 100%;
  text-align: center;
}

.login-box h1 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: #7f8c8d;
  margin-bottom: 2rem;
}

.sso-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.sso-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  border: 2px solid #ddd;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
}

.sso-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.google-button {
  color: #333;
  background: white;
  border-color: #ddd;
}

.google-button:hover {
  border-color: #4285F4;
}

.microsoft-button {
  color: #333;
  background: white;
  border-color: #ddd;
}

.microsoft-button:hover {
  border-color: #00a4ef;
}

.sso-button .icon {
  width: 24px;
  height: 24px;
}

.info-box {
  background-color: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 6px;
  padding: 1rem;
  font-size: 0.9rem;
  color: #1565c0;
}

/* Dashboard */
.dashboard-container {
  flex: 1;
  padding: 2rem 0;
}

.dashboard-header {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
}

.dashboard-header h1 {
  color: #2c3e50;
  margin-bottom: 1rem;
}

.user-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.info-item {
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 6px;
}

.info-label {
  font-weight: 600;
  color: #7f8c8d;
  font-size: 0.9rem;
}

.info-value {
  color: #2c3e50;
  font-size: 1.1rem;
  margin-top: 0.3rem;
}

.dashboard-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* Notes */
.notes-container {
  flex: 1;
  padding: 2rem 0;
}

.page-header {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notes-list {
  display: grid;
  gap: 1.5rem;
}

.note-card {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}

.note-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.note-card h3 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.note-meta {
  color: #7f8c8d;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.note-preview {
  color: #555;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.note-actions {
  display: flex;
  gap: 1rem;
}

/* Note Form */
.note-form {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #2c3e50;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #3498db;
}

.form-group textarea {
  min-height: 200px;
  resize: vertical;
}

.vulnerability-warning {
  background-color: #ffebee;
  border: 2px solid #ef5350;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  color: #c62828;
}

/* Note View */
.note-view {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.note-view h1 {
  color: #2c3e50;
  margin-bottom: 1rem;
}

.note-content {
  line-height: 1.8;
  color: #333;
  margin: 2rem 0;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 6px;
  min-height: 100px;
}

.back-link {
  display: inline-block;
  margin-top: 2rem;
  color: #3498db;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background-color: #2c3e50;
  color: white;
  text-align: center;
  padding: 1.5rem 0;
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

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

  .navbar .container {
    flex-direction: column;
    gap: 1rem;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}