app.css

/* Base Styles */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #6366f1;
  --secondary: #ec4899;
  --secondary-dark: #db2777;
  --secondary-light: #f472b6;
  --dark: #1e293b;
  --darker: #0f172a;
  --light: #f8fafc;
  --lighter: #ffffff;
  --gray: #64748b;
  --gray-light: #e2e8f0;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
}

/* Typography */
html {
  font-size: 16px;
  line-height: 1.5;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--dark);
  background-color: var(--light);
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

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

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

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

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

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

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

/* Forms */
.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-light);
  border-radius: 0.375rem;
  transition: border-color 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

/* Cards */
.card {
  background-color: var(--lighter);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 1.5rem;
}

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

.alert-primary {
  background-color: var(--primary-light);
  color: white;
}

.alert-danger {
  background-color: var(--danger);
  color: white;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.3s ease-in;
}

/* Dark Mode */
.dark {
  background-color: var(--darker);
  color: var(--light);
}

.dark .card {
  background-color: var(--dark);
}

/* Responsive Utilities */
@media (min-width: 640px) {
  .sm\:flex {
    display: flex;
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Custom Components */
.loader {
  border: 4px solid var(--gray-light);
  border-top: 4px solid var(--primary);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.bg-primary { background-color: var(--primary); }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.p-4 { padding: 1rem; }
.rounded-lg { border-radius: 0.5rem; }
.shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1); }