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

:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #6ee7b7;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --red-500: #ef4444;
  --amber-500: #f59e0b;
  --blue-500: #3b82f6;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
}

.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 2rem 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.header-content h1 {
  font-size: 2rem;
  font-weight: 700;
}

.header-content p {
  font-size: 0.875rem;
  opacity: 0.9;
}

/* Main Layout */
main {
  padding: 2rem 0;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-box {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  padding: 1.5rem;
  border-radius: 12px;
  color: var(--white);
  text-align: center;
}

.stat-box .value {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0.5rem 0;
}

.stat-box .label {
  font-size: 0.875rem;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Progress Bar */
.progress-container {
  margin: 1.5rem 0;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background-color: var(--gray-200);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  transition: width 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
}

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

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--gray-700);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Mood Rating */
.mood-selector {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
}

.mood-btn {
  width: 50px;
  height: 50px;
  border: 2px solid var(--gray-300);
  background: var(--white);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.mood-btn:hover {
  transform: scale(1.1);
  border-color: var(--primary);
}

.mood-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--white);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1rem;
  text-align: center;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--gray-200);
  color: var(--gray-800);
}

.btn-secondary:hover {
  background-color: var(--gray-300);
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-full {
  width: 100%;
}

/* Day Logs */
.day-logs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.day-log-item {
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  background-color: var(--gray-100);
  border: 2px solid var(--gray-200);
  transition: all 0.2s;
  font-weight: 500;
  color: var(--gray-600);
}

.day-log-item:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--white);
}

.day-log-item.logged {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary-dark);
}

.day-log-item.current {
  background-color: var(--amber-500);
  color: var(--white);
  border-color: var(--amber-500);
  font-weight: 700;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.2s;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 12px;
  width: 95%;
  max-width: 500px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-400);
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--gray-600);
}

/* Alert Messages */
.alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  animation: slideDown 0.3s;
}

.alert-success {
  background-color: #d1fae5;
  color: #065f46;
  border-left: 4px solid var(--primary);
}

.alert-error {
  background-color: #fee2e2;
  color: #7f1d1d;
  border-left: 4px solid var(--red-500);
}

.alert-info {
  background-color: #dbeafe;
  color: #0c2d6b;
  border-left: 4px solid var(--blue-500);
}

/* Loading State */
.loading {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--gray-300);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

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

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

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

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .header-content h1 {
    font-size: 1.5rem;
  }

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

  .day-logs {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }

  .modal-content {
    width: 90%;
    padding: 1.5rem;
  }

  main {
    padding: 1rem 0;
  }
}

@media (max-width: 480px) {
  .stat-box .value {
    font-size: 2rem;
  }

  .mood-btn {
    width: 45px;
    height: 45px;
    font-size: 1.25rem;
  }

  .day-logs {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  }

  .btn {
    padding: 0.65rem 1.25rem;
    font-size: 0.95rem;
  }
}