// Mobile Shopping App Styles
// Clean, simple design without glassmorphism

:root {
  --primary-color: #007AFF;
  --secondary-color: #5856D6;
  --success-color: #34C759;
  --danger-color: #FF3B30;
  --warning-color: #FF9500;
  --background-color: #f8f9fa;
  --surface-color: #ffffff;
  --border-color: #e1e5e9;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-muted: #8e8e93;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --border-radius-small: 8px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 100vw;
  overflow-x: hidden;
}

// Header
.header {
  background: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-light);

  .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 600px;
    margin: 0 auto;

    h1 {
      font-size: 1.5rem;
      font-weight: 600;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: var(--spacing-sm);

      svg {
        color: var(--primary-color);
        font-size: 1.25rem;
      }
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: var(--spacing-sm);
    }
  }
}

// Main Content
.main {
  flex: 1;
  padding: var(--spacing-md);
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  padding-bottom: 100px; // Space for FAB
}

// Error Message
.error-message {
  background: var(--danger-color);
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-small);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;

  button {
    background: none;
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;

    &:hover {
      background: rgba(255, 255, 255, 0.1);
    }
  }
}

// Loading State
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 60vh;
  color: var(--text-secondary);

  .loading-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    animation: pulse 2s infinite;
  }

  p {
    font-size: 1.1rem;
    font-weight: 500;
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

// Shopping Content
.shopping-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.shopping-section {
  h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding: 0 var(--spacing-xs);
  }
}

.items-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

// Empty State
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  text-align: center;

  svg {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
  }

  p {
    font-size: 1.1rem;
    font-weight: 500;
  }
}

// Shopping Item
.shopping-item {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-light);

  &:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
  }

  &.checked {
    opacity: 0.7;
    background: #f8f9fa;

    .item-name {
      text-decoration: line-through;
      color: var(--text-muted);
    }

    .check-btn {
      background: var(--success-color);
      color: white;

      &:hover {
        background: #28a745;
      }
    }
  }

  .check-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--surface-color);
    color: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-top: 2px;

    &:hover {
      border-color: var(--success-color);
      background: rgba(52, 199, 89, 0.1);
    }

    svg {
      font-size: 0.875rem;
    }
  }

  .item-content {
    flex: 1;
    min-width: 0;

    .item-main {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: var(--spacing-xs);

      .item-name {
        font-weight: 500;
        color: var(--text-primary);
        font-size: 1rem;
        flex: 1;
        word-break: break-word;
      }

      .item-amount {
        background: var(--primary-color);
        color: white;
        padding: 2px 8px;
        border-radius: 12px;
        font-size: 0.75rem;
        font-weight: 600;
        margin-left: var(--spacing-sm);
        flex-shrink: 0;
      }
    }

    .item-meta {
      display: flex;
      align-items: center;
      gap: var(--spacing-md);
      font-size: 0.875rem;
      color: var(--text-secondary);

      .deletion-timer {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        color: var(--warning-color);
        font-weight: 500;

        svg {
          font-size: 0.75rem;
        }
      }
    }

    .edit-form {
      display: flex;
      flex-direction: column;
      gap: var(--spacing-sm);

      input {
        width: 100%;
        padding: var(--spacing-sm);
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-small);
        font-size: 1rem;
        background: var(--surface-color);

        &:focus {
          outline: none;
          border-color: var(--primary-color);
          box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
        }
      }

      .edit-actions {
        display: flex;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-xs);
      }
    }
  }

  .item-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
  }
}

// Buttons
.btn {
  border: none;
  border-radius: var(--border-radius-small);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  transition: all 0.2s ease;
  text-decoration: none;

  &:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

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

    &:hover:not(:disabled) {
      background: #0056b3;
      transform: translateY(-1px);
    }
  }

  &.btn-secondary {
    background: var(--border-color);
    color: var(--text-primary);

    &:hover:not(:disabled) {
      background: #d1d5db;
    }
  }

  &.btn-danger {
    background: var(--danger-color);
    color: white;

    &:hover:not(:disabled) {
      background: #dc3545;
    }
  }

  &.btn-small {
    padding: var(--spacing-xs);
    font-size: 0.75rem;
    width: 32px;
    height: 32px;

    svg {
      font-size: 0.875rem;
    }
  }

  svg {
    font-size: 1rem;
  }
}

// Add Form Overlay
.add-form-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);

  .add-form {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-medium);

    h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: var(--spacing-md);
      color: var(--text-primary);
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: var(--spacing-sm);
      margin-bottom: var(--spacing-lg);

      input {
        width: 100%;
        padding: var(--spacing-md);
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-small);
        font-size: 1rem;
        background: var(--surface-color);

        &:focus {
          outline: none;
          border-color: var(--primary-color);
          box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
        }
      }
    }

    .form-actions {
      display: flex;
      gap: var(--spacing-sm);
      justify-content: flex-end;
    }
  }
}

// Floating Action Button
.fab-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 100;

  .fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-medium);
    transition: all 0.2s ease;

    &:hover {
      background: #0056b3;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    }

    &:active {
      transform: translateY(0);
    }
  }
}

// Responsive Design
@media (max-width: 480px) {
  .main {
    padding: var(--spacing-sm);
  }

  .header {
    padding: var(--spacing-xs) var(--spacing-sm);

    .header-content h1 {
      font-size: 1.25rem;
    }
  }

  .shopping-item {
    padding: var(--spacing-sm);

    .item-content .item-main {
      flex-direction: column;
      align-items: flex-start;
      gap: var(--spacing-xs);

      .item-amount {
        margin-left: 0;
      }
    }

    .item-actions {
      flex-direction: column;
    }
  }

  .add-form-overlay {
    padding: var(--spacing-sm);

    .add-form {
      padding: var(--spacing-md);
    }
  }

  .fab-container {
    bottom: var(--spacing-md);
    right: var(--spacing-md);

    .fab {
      width: 48px;
      height: 48px;
      font-size: 1.125rem;
    }
  }
}