body {
            font-family: "Inter", sans-serif;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
            background: linear-gradient(to bottom, #eff6ff, #ffffff);
            color: #111827;
            line-height: 1.6;
            min-height: 100vh;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding: 20px;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
            border-radius: 16px;
            box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
        }

        .greeting {
            font-size: 1.6em;
            font-weight: 400;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .date {
            font-size: 1.2em;
            font-weight: 400;
            text-align: right;
        }

        h1 {
            text-align: center;
            color: #3b82f6;
            font-weight: 500;
            margin-bottom: 30px;
            font-size: 3em;
            letter-spacing: -0.02em;
        }

        #taskForm {
            background: #ffffff;
            padding: 30px;
            border-radius: 16px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
            margin-bottom: 20px;
            border: 1px solid #e5e7eb;
            animation: fadeIn 0.5s ease;
        }

        #searchContainer {
            background: #ffffff;
            padding: 20px 30px;
            border-radius: 16px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
            margin-bottom: 20px;
            border: 1px solid #e5e7eb;
            animation: fadeIn 0.5s ease;
        }

        #searchInput {
            width: 100%;
            padding: 14px;
            border: 2px solid #e5e7eb;
            border-radius: 8px;
            font-size: 16px;
            box-sizing: border-box;
            transition: border-color 0.2s ease;
        }

        #searchInput:focus {
            border-color: #3b82f6;
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        #searchInput::placeholder {
            color: #9ca3af;
        }

        input[type="text"],
        input[type="date"] {
            padding: 14px;
            margin: 10px 5px;
            border: 2px solid #e5e7eb;
            border-radius: 8px;
            font-size: 16px;
            width: calc(50% - 25px);
            box-sizing: border-box;
            transition: border-color 0.1s ease;
        }

        input[type="text"]:focus,
        input[type="date"]:focus {
            border-color: #3b82f6;
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        button {
            padding: 14px 24px;
            margin: 10px 5px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
            color: white;
            transform: translateY(0);
        }

        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }

        #addBtn {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
        }

        #addBtn:hover {
            background: linear-gradient(135deg, #2563eb, #1e40af);
        }

        .complete-btn {
            background: linear-gradient(135deg, #10b981, #059669);
        }

        .complete-btn:hover {
            background: linear-gradient(135deg, #059669, #047857);
        }

        .edit-btn {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }

        .edit-btn:hover {
            background: linear-gradient(135deg, #d97706, #b45309);
        }

        .delete-btn {
            background: linear-gradient(135deg, #ef4444, #dc2626);
        }

        .delete-btn:hover {
            background: linear-gradient(135deg, #dc2626, #b91c1c);
        }

        #taskList {
            background: #ffffff;
            padding: 30px;
            border-radius: 16px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
            max-height: 500px;
            overflow-y: auto;
            border: 1px solid #e5e7eb;
            animation: fadeIn 0.5s ease;
        }

        .task {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
            border-bottom: 1px solid #e5e7eb;
            margin-bottom: 15px;
            border-radius: 12px;
            transition: all 0.3s ease;
            animation: slideIn 0.3s ease forwards;
            opacity: 0;
            transform: translateX(-20px);
        }

        .task:hover {
            background: #f9fafb;
            transform: scale(1.01);
        }

        .task.completed {
            opacity: 0.8;
            background: linear-gradient(135deg, #ecfdf5, #d1fae5);
            text-decoration: line-through;
        }

        .task.hidden {
            display: none;
        }

        .task-content {
            flex: 1;
            padding-right: 20px;
        }

        .task-title {
            font-weight: 500;
            font-size: 20px;
            margin: 0 0 8px 0;
            color: #111827;
        }

        .task-due {
            color: #6b7280;
            font-size: 15px;
        }

        .task-actions {
            display: flex;
            gap: 10px;
        }

        #progress {
            margin-top: 30px;
            text-align: center;
            background: #ffffff;
            padding: 25px;
            border-radius: 16px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
            border: 1px solid #e5e7eb;
            animation: fadeIn 0.5s ease;
        }

        .progress-bar {
            width: 100%;
            height: 28px;
            background: #e5e7eb;
            border-radius: 14px;
            overflow: hidden;
            margin-bottom: 12px;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #f59e0b, #10b981, #3b82f6);
            transition: width 0.4s ease;
            border-radius: 14px;
            box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
        }

        #progressText {
            font-weight: 500;
            font-size: 20px;
            color: #111827;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideIn {
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .task:nth-child(even) {
            animation-delay: 0.2s;
        }

        .task:nth-child(odd) {
            animation-delay: 0.2s;
        }

        @media (max-width: 600px) {
            .header {
                flex-direction: column;
                gap: 15px;
                text-align: center;
                padding: 15px;
            }

            input[type="text"],
            input[type="date"] {
                width: 100%;
                margin: 10px 0;
            }

            .task {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }

            .task-actions {
                width: 100%;
                justify-content: flex-end;
            }

            h1 {
                font-size: 2.3em;
            }

            .greeting,
            .date {
                text-align: center;
            }

            button {
                width: 100%;
                margin: 5px 0;
            }
        }