:root {
  /* Color Scheme */
  --primary-color: #2563eb;
  --secondary-color: #3b82f6;
  --accent-color: #60a5fa;
  --background-color: #ffffff;
  --text-color: #1f2937;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;

  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.5;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-color);
  background-color: var(--background-color);
}

/* Common Components */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

/* Form Elements */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 1rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

/* Card Styles */
.card {
  background-color: white;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
}

/* Alert Styles */
.alert {
  padding: 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
}

.alert-success {
  background-color: #ecfdf5;
  color: var(--success-color);
  border: 1px solid #a7f3d0;
}

.alert-error {
  background-color: #fef2f2;
  color: var(--error-color);
  border: 1px solid #fecaca;
}

/* Navigation */
.nav {
  background-color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1rem 0;
}

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

/* Timeline */
.timeline {
  border-left: 2px solid var(--border-color);
  padding-left: 1.5rem;
  margin-left: 1rem;
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.75rem;
  top: 0.25rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--primary-color);
  border-radius: 50%;
}

/* Journal Entry */
.journal-entry {
  max-width: 800px;
  margin: 2rem auto;
}

.entry-header {
  margin-bottom: 2rem;
}

.entry-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.entry-meta {
  color: #6b7280;
  font-size: 0.875rem;
}

/* Comments */
.comments-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.comment {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 0.5rem;
  }
  
  .entry-title {
    font-size: 1.5rem;
  }
}