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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: linear-gradient(135deg, #f5f3ff 0%, #ffffff 50%, #eff6ff 100%);
  min-height: 100vh;
  color: #1f2937;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(135deg, #0f0a1f 0%, #1a1625 50%, #0f172a 100%);
    color: #f3f4f6;
  }
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 40px;
}

.header-content {
  margin-bottom: 30px;
}

.title {
  font-size: 32px;
  font-weight: 700;
  color: #6a11cb;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.sparkle {
  display: inline-block;
  animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
  0%,
  100% {
    transform: scale(1) rotate(0deg);
  }
  50% {
    transform: scale(1.2) rotate(10deg);
  }
}

.subtitle {
  font-size: 16px;
  color: #6b7280;
  font-weight: 400;
}

@media (prefers-color-scheme: dark) {
  .subtitle {
    color: #d1d5db;
  }
}

/* Stats */
.stats {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.stat-card {
  background: white;
  padding: 20px 32px;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(106, 17, 203, 0.08);
  min-width: 140px;
}

@media (prefers-color-scheme: dark) {
  .stat-card {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 13px;
  color: #6b7280;
  margin-top: 4px;
  font-weight: 500;
}

@media (prefers-color-scheme: dark) {
  .stat-label {
    color: #d1d5db;
  }
}

/* Actions */
.actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(106, 17, 203, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(106, 17, 203, 0.4);
}

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

.btn-secondary {
  background: white;
  color: #6a11cb;
  border: 2px solid #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  .btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #c4b5fd;
    border: 2px solid rgba(255, 255, 255, 0.15);
  }
}

.btn-secondary:hover {
  border-color: #6a11cb;
  background: #f9fafb;
}

@media (prefers-color-scheme: dark) {
  .btn-secondary:hover {
    border-color: #c4b5fd;
    background: rgba(255, 255, 255, 0.15);
  }
}

.btn-cancel {
  background: #f3f4f6;
  color: #6b7280;
}

@media (prefers-color-scheme: dark) {
  .btn-cancel {
    background: rgba(255, 255, 255, 0.08);
    color: #d1d5db;
  }
}

.btn-cancel:hover {
  background: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  .btn-cancel:hover {
    background: rgba(255, 255, 255, 0.12);
  }
}

.btn-icon {
  font-size: 18px;
  font-weight: 700;
}

/* Add Form */
.add-form {
  background: white;
  padding: 24px;
  border-radius: 16px;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  .add-form {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
}

.habit-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 15px;
  font-family: inherit;
  margin-bottom: 16px;
  transition: border-color 0.2s;
}

@media (prefers-color-scheme: dark) {
  .habit-input {
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.15);
    color: #f3f4f6;
  }

  .habit-input::placeholder {
    color: #d1d5db;
  }
}

.habit-input:focus {
  outline: none;
  border-color: #6a11cb;
}

.form-actions {
  display: flex;
  gap: 12px;
}

/* Calendar Header */
.calendar-header {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  padding: 0 16px;
}

.day-label {
  flex: 1;
  font-weight: 600;
  color: #6b7280;
  font-size: 14px;
  padding-top: 8px;
}

@media (prefers-color-scheme: dark) {
  .day-label {
    color: #d1d5db;
  }
}

.days-grid {
  display: flex;
  gap: 8px;
}

.day-col {
  width: 44px;
  text-align: center;
}

.day-name {
  font-size: 12px;
  font-weight: 600;
  color: #9ca3af;
  margin-bottom: 4px;
}

@media (prefers-color-scheme: dark) {
  .day-name {
    color: #d1d5db;
  }
}

.day-name.today {
  color: #6a11cb;
}

@media (prefers-color-scheme: dark) {
  .day-name.today {
    color: #c4b5fd;
  }
}

.day-date {
  font-size: 13px;
  color: #6b7280;
}

@media (prefers-color-scheme: dark) {
  .day-date {
    color: #d1d5db;
  }
}

/* Habits List */
.habits-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.habit-card {
  background: white;
  padding: 16px;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  display: flex;
  gap: 12px;
  align-items: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

@media (prefers-color-scheme: dark) {
  .habit-card {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
}

.habit-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  .habit-card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    border-color: rgba(255, 255, 255, 0.15);
  }
}

.habit-info {
  flex: 1;
  min-width: 0;
}

.habit-name {
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 6px;
  word-wrap: break-word;
}

@media (prefers-color-scheme: dark) {
  .habit-name {
    color: #f3f4f6;
  }
}

.habit-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: #ff512f;
  background: #fff5f3;
  padding: 4px 10px;
  border-radius: 8px;
}

.delete-btn {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity 0.2s;
  padding: 4px;
}

.delete-btn:hover {
  opacity: 1;
}

.habit-checks {
  display: flex;
  gap: 8px;
}

.check-box {
  width: 44px;
  height: 44px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  background: white;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

@media (prefers-color-scheme: dark) {
  .check-box {
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.15);
  }
}

.check-box:hover {
  border-color: #6a11cb;
  background: #f9fafb;
}

@media (prefers-color-scheme: dark) {
  .check-box:hover {
    border-color: #c4b5fd;
    background: rgba(255, 255, 255, 0.15);
  }
}

.check-box.today {
  border-color: #6a11cb;
  border-width: 3px;
}

@media (prefers-color-scheme: dark) {
  .check-box.today {
    border-color: #c4b5fd;
  }
}

.check-box.checked {
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  border-color: #6a11cb;
}

.check-box.checked:hover {
  transform: scale(1.05);
}

.check-box.celebrate {
  animation: celebrate 0.6s ease;
}

@keyframes celebrate {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2) rotate(10deg);
  }
  100% {
    transform: scale(1);
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #9ca3af;
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 18px;
  font-weight: 600;
  color: #6b7280;
  margin-bottom: 8px;
}

.empty-subtitle {
  font-size: 14px;
  color: #9ca3af;
  font-weight: 400;
}

/* Footer */
.footer {
  background: white;
  border-top: 1px solid #e5e7eb;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  .footer {
    background: rgba(255, 255, 255, 0.08);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.4);
  }
}

.footer-actions {
  display: flex;
  gap: 12px;
}

.btn-footer {
  background: white;
  color: #6a11cb;
  border: 2px solid #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  .btn-footer {
    background: rgba(255, 255, 255, 0.08);
    color: #c4b5fd;
    border: 2px solid rgba(255, 255, 255, 0.15);
  }
}

.btn-footer:hover {
  border-color: #6a11cb;
  background: #f9fafb;
}

@media (prefers-color-scheme: dark) {
  .btn-footer:hover {
    border-color: #c4b5fd;
    background: rgba(255, 255, 255, 0.15);
  }
}

.footer-text {
  font-size: 13px;
  color: #6b7280;
  text-align: right;
  flex: 1;
}

@media (prefers-color-scheme: dark) {
  .footer-text {
    color: #d1d5db;
  }

  a {
    color: #d1d5db;
  }
}

/* Add padding to container to account for fixed footer */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 20px 100px 20px;
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .container {
    padding: 16px 16px 100px 16px;
  }

  .title {
    font-size: 28px;
  }

  .stat-card {
    padding: 16px 24px;
    min-width: 120px;
  }

  .stat-number {
    font-size: 28px;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .calendar-header {
    padding: 0 8px;
  }

  .day-col {
    width: 36px;
  }

  .check-box {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .habit-card {
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
  }

  .habit-checks {
    justify-content: space-between;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
    gap: 12px;
  }

  .footer-actions {
    width: 100%;
  }

  .btn-footer {
    flex: 1;
  }

  .footer-text {
    text-align: left;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .day-col {
    width: 32px;
  }

  .check-box {
    width: 32px;
    height: 32px;
  }

  .habit-checks {
    gap: 4px;
  }
}