:root {
      --bg: #f8fafc;
      --card: #ffffff;
      --card-hover: #f1f5f9;
      --muted: #64748b;
      --text: #1e293b;
      --accent: #3b82f6;
      --accent-hover: #2563eb;
      --success: #10b981;
      --warning: #f59e0b;
      --danger: #ef4444;
      --border: #e2e8f0;
      --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --radius: 12px;
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* Header Styles */
    header {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      padding: 1rem 1.5rem;
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .header-container {
      max-width: 1400px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .brand img {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      object-fit: cover;
      border: 1px solid var(--border);
    }

    .brand-text h1 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 0.125rem;
    }

    .brand-text .sub {
      color: var(--muted);
      font-size: 0.875rem;
    }

    .header-info {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .nav-menu {
      display: flex;
      gap: 0.5rem;
    }

    .nav-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.5rem 1rem;
      border-radius: 8px;
      color: var(--text);
      text-decoration: none;
      font-size: 0.875rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .nav-item:hover {
      background: var(--card-hover);
    }

    .nav-item.active {
      background: var(--accent);
      color: white;
    }

    .date-display {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(241, 245, 249, 0.7);
      padding: 0.5rem 1rem;
      border-radius: 50px;
      border: 1px solid var(--border);
      font-size: 0.875rem;
    }

    .status-indicator {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--success);
      animation: pulse 2s infinite;
    }

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

    .logout-btn {
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text);
      padding: 0.5rem 1rem;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.875rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .logout-btn:hover {
      background: rgba(239, 68, 68, 0.1);
      border-color: var(--danger);
      color: var(--danger);
    }

    /* Main Content */
    main {
      flex: 1;
      padding: 2rem 1.5rem;
      max-width: 800px;
      margin: 0 auto;
      width: 100%;
    }

    .page-header {
      margin-bottom: 2rem;
    }

    .page-header h2 {
      font-size: 1.75rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .page-header h2 i {
      color: var(--accent);
    }

    .page-header p {
      color: var(--muted);
    }

    /* Dashboard Card */
    .dashboard-card {
      background: var(--card);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--border);
      margin-bottom: 2rem;
    }

    .card-header {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .card-header h3 {
      font-size: 1.25rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .card-header h3 i {
      color: var(--accent);
    }

    /* Instructions Panel */
    .instructions-panel {
      background: rgba(241, 245, 249, 0.5);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .instructions-panel h4 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text);
    }

    .instructions-panel h4 i {
      color: var(--accent);
    }

    .instructions-list {
      list-style: none;
      padding: 0;
    }

    .instructions-list li {
      display: flex;
      align-items: flex-start;
      gap: 0.75rem;
      margin-bottom: 0.75rem;
      font-size: 0.875rem;
      color: var(--muted);
    }

    .instructions-list li:last-child {
      margin-bottom: 0;
    }

    .instructions-list li i {
      color: var(--accent);
      margin-top: 0.125rem;
      flex-shrink: 0;
    }

    /* Form Styles */
    .form-section {
      padding: 1.5rem;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .form-group.full-width {
      grid-column: 1 / -1;
    }

    .form-label {
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .form-label i {
      color: var(--muted);
      width: 16px;
    }

    .form-label .required {
      color: var(--danger);
    }

    .form-input, .form-textarea, .form-select {
      background: rgba(248, 250, 252, 0.5);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 0.75rem 1rem;
      color: var(--text);
      font-size: 0.875rem;
      transition: var(--transition);
      width: 100%;
    }

    .form-input:focus, .form-textarea:focus, .form-select:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }

    .form-input.error {
      border-color: var(--danger);
    }

    .form-help {
      font-size: 0.75rem;
      color: var(--muted);
      margin-top: 0.25rem;
    }

    .form-help.error {
      color: var(--danger);
    }

    .file-input-wrapper {
      position: relative;
      overflow: hidden;
      display: inline-block;
      width: 100%;
    }

    .file-input-wrapper input[type=file] {
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      width: 100%;
      height: 100%;
      cursor: pointer;
    }

    .file-input-button {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      background: rgba(248, 250, 252, 0.5);
      border: 1px dashed var(--border);
      border-radius: 8px;
      padding: 1rem;
      color: var(--muted);
      font-size: 0.875rem;
      transition: var(--transition);
      cursor: pointer;
    }

    .file-input-button:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .file-input-button.has-file {
      border-color: var(--success);
      color: var(--success);
    }

    .form-actions {
      display: flex;
      gap: 1rem;
      justify-content: flex-end;
      padding: 1.5rem;
      border-top: 1px solid var(--border);
      background: rgba(248, 250, 252, 0.3);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.75rem 1.5rem;
      border-radius: 8px;
      font-weight: 500;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
      font-size: 0.875rem;
      white-space: nowrap;
    }

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

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

    .btn-primary:disabled {
      background: var(--muted);
      cursor: not-allowed;
    }

    .btn-outline {
      background: transparent;
      color: var(--text);
      border: 1px solid var(--border);
    }

    .btn-outline:hover {
      background: rgba(0, 0, 0, 0.05);
      border-color: var(--accent);
    }

    .message {
      padding: 1rem 1.5rem;
      border-radius: 8px;
      margin: 1rem 0;
      font-size: 0.875rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .message-success {
      background: rgba(16, 185, 129, 0.1);
      color: var(--success);
      border: 1px solid rgba(16, 185, 129, 0.2);
    }

    .message-error {
      background: rgba(239, 68, 68, 0.1);
      color: var(--danger);
      border: 1px solid rgba(239, 68, 68, 0.2);
    }

    .message-info {
      background: rgba(59, 130, 246, 0.1);
      color: var(--accent);
      border: 1px solid rgba(59, 130, 246, 0.2);
    }

    .hidden {
      display: none !important;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 500;
      white-space: nowrap;
    }

    .badge-success {
      background: rgba(16, 185, 129, 0.1);
      color: var(--success);
      border: 1px solid rgba(16, 185, 129, 0.2);
    }

    /* Responsive Styles */
    @media (max-width: 768px) {
      .header-container {
        flex-direction: column;
        align-items: flex-start;
      }
      
      .header-info {
        width: 100%;
        justify-content: space-between;
      }
      
      .form-grid {
        grid-template-columns: 1fr;
      }
      
      .form-actions {
        flex-direction: column;
      }
    }

    @media (max-width: 480px) {
      .card-header {
        flex-direction: column;
        align-items: flex-start;
      }
    }