/* Global Styles */
    :root {
      --bg-color: #1f1f2e;
      --card-bg: #2b2b3c;
      --accent: #00c896;
      --text-color: #ffffff;
      --light-text: #cfcfcf;
      --error-color: #ff6b6b;
    }

    * {
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
      margin: 0;
      padding: 0;
      background: var(--bg-color);
      color: var(--text-color);
      min-height: 100vh;
    }

    /* Auth Modal */
    .auth-modal {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.8);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }

    .auth-container {
      background: var(--card-bg);
      padding: 2rem;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      width: 90%;
      max-width: 400px;
      position: relative;
    }

    .close-auth {
      position: absolute;
      top: 15px;
      right: 15px;
      background: none;
      border: none;
      color: var(--light-text);
      font-size: 1.5rem;
      cursor: pointer;
    }

    .auth-tabs {
      display: flex;
      margin-bottom: 1.5rem;
    }

    .auth-tab {
      flex: 1;
      padding: 0.8rem;
      text-align: center;
      background: #333344;
      border: none;
      color: var(--light-text);
      cursor: pointer;
      transition: all 0.3s;
    }

    .auth-tab.active {
      background: var(--accent);
      color: #000;
      font-weight: bold;
    }

    .auth-form {
      display: none;
    }

    .auth-form.active {
      display: block;
    }

    .auth-form h2 {
      text-align: center;
      margin-bottom: 1.5rem;
      color: var(--accent);
    }

    .auth-form label {
      display: block;
      margin-top: 1rem;
      margin-bottom: 0.5rem;
      color: var(--light-text);
    }

    .auth-form input {
      width: 100%;
      padding: 0.8rem;
      border: none;
      border-radius: 8px;
      margin-bottom: 0.5rem;
      background: #444455;
      color: white;
    }

    .auth-form button {
      width: 100%;
      padding: 0.8rem;
      background: var(--accent);
      border: none;
      border-radius: 8px;
      color: #000;
      font-weight: bold;
      cursor: pointer;
      transition: background 0.3s;
      margin-top: 1rem;
    }

    .auth-form button:hover {
      background: #00aa7a;
    }

    .auth-divider {
      text-align: center;
      margin: 1.5rem 0;
      color: var(--light-text);
      position: relative;
    }

    .auth-divider::before,
    .auth-divider::after {
      content: "";
      position: absolute;
      top: 50%;
      width: 45%;
      height: 1px;
      background: #444;
    }

    .auth-divider::before {
      left: 0;
    }

    .auth-divider::after {
      right: 0;
    }

    .google-btn {
      width: 100%;
      padding: 0.8rem;
      background: #4285F4;
      border: none;
      border-radius: 8px;
      color: white;
      font-weight: bold;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      margin-top: 1rem;
    }

    .google-btn:hover {
      background: #357ae8;
    }

    .forgot-password {
      text-align: right;
      margin-top: -0.5rem;
      margin-bottom: 1rem;
    }

    .forgot-password a {
      color: var(--accent);
      text-decoration: none;
      font-size: 0.9rem;
    }

    .error-message {
      color: var(--error-color);
      font-size: 0.9rem;
      margin-top: -0.5rem;
      margin-bottom: 0.5rem;
    }

    /* Main App */
    .app-container {
      display: none;
      max-width: 1200px;
      margin: 0 auto;
      padding: 1rem;
    }

    /* Header */
    .app-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 2rem;
    }

    .app-title {
      color: var(--accent);
      margin: 0;
    }

    .user-menu {
      position: relative;
    }

    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      cursor: pointer;
      object-fit: cover;
    }

    .profile-dropdown {
      position: absolute;
      right: 0;
      top: 50px;
      background: var(--card-bg);
      border-radius: 8px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      width: 200px;
      padding: 1rem;
      z-index: 100;
      display: none;
    }

    .profile-dropdown.active {
      display: block;
    }

    .profile-dropdown p {
      margin: 0 0 1rem 0;
      color: var(--light-text);
    }

    .profile-dropdown button {
      width: 100%;
      padding: 0.5rem;
      background: transparent;
      border: 1px solid var(--accent);
      border-radius: 4px;
      color: var(--accent);
      cursor: pointer;
      margin-bottom: 0.5rem;
    }

    .profile-dropdown button:hover {
      background: rgba(0, 200, 150, 0.1);
    }

    /* Profile Modal */
    .profile-modal {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.8);
      display: none;
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }

    .profile-modal.active {
      display: flex;
    }

    .profile-container {
      background: var(--card-bg);
      padding: 2rem;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      width: 90%;
      max-width: 500px;
      position: relative;
    }

    .close-profile {
      position: absolute;
      top: 15px;
      right: 15px;
      background: none;
      border: none;
      color: var(--light-text);
      font-size: 1.5rem;
      cursor: pointer;
    }

    .profile-header {
      display: flex;
      align-items: center;
      margin-bottom: 1.5rem;
    }

    .profile-avatar {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      object-fit: cover;
      margin-right: 1.5rem;
    }

    .profile-info h2 {
      margin: 0 0 0.5rem 0;
      color: var(--accent);
    }

    .profile-info p {
      margin: 0;
      color: var(--light-text);
    }

    .profile-form {
      margin-top: 1.5rem;
    }

    .profile-form label {
      display: block;
      margin-top: 1rem;
      margin-bottom: 0.5rem;
      color: var(--light-text);
    }

    .profile-form input {
      width: 100%;
      padding: 0.8rem;
      border: none;
      border-radius: 8px;
      margin-bottom: 0.5rem;
      background: #444455;
      color: white;
    }

    .profile-form button {
      width: 100%;
      padding: 0.8rem;
      background: var(--accent);
      border: none;
      border-radius: 8px;
      color: #000;
      font-weight: bold;
      cursor: pointer;
      transition: background 0.3s;
      margin-top: 1rem;
    }

    .profile-form button:hover {
      background: #00aa7a;
    }

    /* Main Content */
    .main-content {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    @media (min-width: 768px) {
      .main-content {
        flex-direction: row;
      }

      .sales-form {
        flex: 1;
      }

      .sales-summary {
        flex: 1;
      }
    }

    /* Sales Form */
    .sales-form {
      background: var(--card-bg);
      padding: 1.5rem;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .sales-form h2 {
      color: var(--accent);
      margin-top: 0;
      margin-bottom: 1.5rem;
    }

    .sales-form label {
      display: block;
      margin-top: 1rem;
      margin-bottom: 0.5rem;
      color: var(--light-text);
    }

    .sales-form input,
    .sales-form select {
      width: 100%;
      padding: 0.8rem;
      border: none;
      border-radius: 8px;
      margin-bottom: 1rem;
      background: #444455;
      color: white;
    }

    .sales-form button {
      width: 100%;
      padding: 0.8rem;
      background: var(--accent);
      border: none;
      border-radius: 8px;
      color: #000;
      font-weight: bold;
      cursor: pointer;
      transition: background 0.3s;
      margin-bottom: 0.5rem;
    }

    .sales-form button:hover {
      background: #00aa7a;
    }

    .reset-btn {
      background: #cc3344 !important;
    }

    .export-btn {
      background: #337acc !important;
    }

    /* Sales Summary */
    .sales-summary {
      background: var(--card-bg);
      padding: 1.5rem;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .sales-summary h2 {
      color: var(--accent);
      margin-top: 0;
      margin-bottom: 1.5rem;
    }

    .summary-stats {
      background: #333344;
      padding: 1rem;
      border-radius: 8px;
      margin-bottom: 1.5rem;
    }

    .summary-stats p {
      margin: 0.5rem 0;
    }

    .summary-stats strong {
      color: var(--accent);
    }

    .progress-bar {
      background: #555;
      height: 20px;
      border-radius: 10px;
      overflow: hidden;
      margin-top: 1rem;
    }

    .progress-bar-fill {
      height: 100%;
      background: var(--accent);
      width: 0%;
      transition: width 0.5s ease-in-out;
    }

    .monthly-list {
      background: #333344;
      padding: 1rem;
      border-radius: 8px;
    }

    .monthly-list h3 {
      margin-top: 0;
      color: var(--accent);
    }

    .monthly-list ul {
      list-style: none;
      padding-left: 0;
      margin: 0;
    }

    .monthly-list li {
      margin-bottom: 0.5rem;
      border-bottom: 1px solid #444;
      padding-bottom: 0.5rem;
    }

    /* Additional styles for calendar */
    .calendar {
      font-family: Arial, sans-serif;
      width: 100%;
      max-width: 100%;
      margin: 0 auto;
      background: #f9f9f9;
      border-radius: 10px;
      padding: 10px;
      box-sizing: border-box;
      overflow: hidden;
    }

    .days-grid {
      display: grid;
      grid-template-columns: repeat(7, 1fr);
      gap: 4px;
    }

    .day-header {
      text-align: center;
      font-weight: bold;
      padding: 8px 4px;
      background: #4CAF50;
      color: white;
      border-radius: 5px;
      font-size: 14px;
    }

    .day-cell {
      background: white;
      border-radius: 5px;
      padding: 8px;
      min-height: 60px;
      cursor: pointer;
      transition: all 0.3s;
      border: 1px solid #e0e0e0;
      position: relative;
      aspect-ratio: 1/1;
      /* Makes cells square */
      overflow: hidden;
    }

    .day-cell:hover {
      background: #f0f0f0;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    .day-number {
      font-weight: bold;
      font-size: 14px;
      margin-bottom: 4px;
      color: #000;
    }

    .day-sale {
      font-size: 12px;
      color: #4CAF50;
      position: absolute;
      bottom: 4px;
      left: 4px;
      right: 4px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .empty {
      background: #f5f5f5;
      cursor: default;
    }

    .modal {
      display: none;
      position: fixed;
      z-index: 100;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5);
    }

    .modal-content {
      background-color: white;
      margin: 15% auto;
      padding: 20px;
      border-radius: 10px;
      width: 300px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    }

    .close {
      float: right;
      font-size: 24px;
      font-weight: bold;
      cursor: pointer;
    }

    .modal-title {
      margin-top: 0;
      color: #4CAF50;
    }

    .modal-input {
      width: 100%;
      padding: 10px;
      margin: 10px 0;
      border: 1px solid #ddd;
      border-radius: 5px;
      font-size: 16px;
    }

    .modal-button {
      background-color: #4CAF50;
      color: white;
      border: none;
      padding: 10px 15px;
      border-radius: 5px;
      cursor: pointer;
      font-size: 16px;
      margin-right: 10px;
    }

    .modal-button:hover {
      background-color: #45a049;
    }

    .calendar-controls {
      display: flex;
      gap: 10px;
      margin-bottom: 15px;
      flex-wrap: wrap;
    }

    .calendar-controls select, 
    .calendar-controls button {
      padding: 8px 12px;
      border-radius: 5px;
      border: 1px solid #444455;
      background: #444455;
      color: white;
    }

    .calendar-controls button {
      background: var(--accent);
      color: #000;
      font-weight: bold;
      cursor: pointer;
    }

    .daily-total {
      background: #333344;
      padding: 1rem;
      border-radius: 8px;
      margin-top: 1rem;
    }

    .app-footer {
      background: var(--card-bg);
      color: var(--light-text);
      padding: 2rem 1rem;
      margin-top: 2rem;
    }

    .footer-content {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 2rem;
    }

    .footer-section {
      flex: 1;
      min-width: 200px;
    }

    .footer-section h3 {
      color: var(--accent);
      margin-top: 0;
    }

    .project-link {
      text-decoration: none;
    }

    .footer-button {
      background: #444455;
      border: none;
      color: var(--light-text);
      padding: 0.5rem 1rem;
      border-radius: 5px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .social-links {
      display: flex;
      gap: 1rem;
    }

    .social-icon {
      color: var(--light-text);
      font-size: 1.5rem;
    }

    .footer-bottom {
      max-width: 1200px;
      margin: 2rem auto 0;
      text-align: center;
      padding-top: 1rem;
      border-top: 1px solid #444455;
    }

    .footer-bottom a {
      color: var(--accent);
      text-decoration: none;
    }