:root {
    --bg-color: #f4f7f9; --container-bg: #ffffff; --text-color: #2c3e50; --subtle-text-color: #7f8c8d; --border-color: #eee;
    --accent-color: #3498db; --accent-hover: #2980b9; --danger-color: #e74c3c; --completed-text: #bdc3c7; --shadow-color: rgba(0, 0, 0, 0.08);
}
body.dark-mode {
    --bg-color: #2c3e50; --container-bg: #34495e; --text-color: #ecf0f1; --subtle-text-color: #95a5a6; --border-color: #46627f; --completed-text: #7f8c8d;
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; background-color: var(--bg-color); color: var(--text-color); margin: 0; padding: 20px; transition: background-color 0.3s, color 0.3s; }
.container { width: 100%; max-width: 600px; margin: 20px auto; background-color: var(--container-bg); padding: 30px; border-radius: 12px; box-shadow: 0 4px 12px var(--shadow-color); }
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 25px; }
h1 { margin: 0; font-size: 24px; }
#themeToggle { border: 1px solid var(--border-color); background-color: var(--bg-color); font-size: 18px; cursor: pointer; width: 40px; height: 40px; border-radius: 50%; display: flex; justify-content: center; align-items: center; transition: all 0.3s; }
#themeToggle:hover { transform: scale(1.1); color: var(--accent-color); }
#taskForm { display: flex; gap: 10px; margin-bottom: 25px; }
#taskInput { flex-grow: 1; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; font-size: 16px; background-color: var(--bg-color); color: var(--text-color); }
#taskInput:focus { outline: none; border-color: var(--accent-color); }
button[type="submit"] { padding: 12px 20px; border: none; background-color: var(--accent-color); color: white; font-size: 16px; border-radius: 8px; cursor: pointer; transition: background-color 0.2s; }
button[type="submit"]:hover { background-color: var(--accent-hover); }
#taskList { list-style: none; padding: 0; margin: 0; }
.task-item { border-left: 5px solid transparent; padding: 15px; padding-left: 10px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; transition: all 0.3s ease; }
.task-item:last-child { border-bottom: none; }
.task-item.completed .task-text-content, .task-item.completed .task-info { text-decoration: line-through; color: var(--completed-text); }
.task-item.priority-kritis { border-left-color: #e74c3c; }
.task-item.priority-penting { border-left-color: #f39c12; }
.task-item.priority-biasa { border-left-color: #3498db; }
.task-content { flex-grow: 1; cursor: pointer; }
.task-info { font-size: 12px; color: var(--subtle-text-color); margin-top: 4px; }
.task-tags { margin-top: 8px; }
.task-tag { display: inline-block; background-color: var(--bg-color); color: var(--subtle-text-color); padding: 3px 8px; border-radius: 12px; font-size: 11px; margin-right: 5px; border: 1px solid var(--border-color); }
.task-subject { font-weight: bold; padding: 3px 8px; border-radius: 4px; font-size: 11px; color: white !important; }
.subject-aps { background-color: #3498db; }
.subject-imk { background-color: #9b59b6; }
.subject-ai { background-color: #e67e22; }
.subject-asd { background-color: #2ecc71; }
.subject-metnum { background-color: #f1c40f; }
.subject-jarkom { background-color: #e74c3c; }
.subject-bindo { background-color: #7f8c8d; }
.subject-lainnya { background-color: #bdc3c7; color: #2c3e50 !important; }
.delete-btn { border: none; background: none; color: var(--danger-color); font-size: 20px; cursor: pointer; opacity: 0; transition: all 0.2s; margin-left: 10px; }
.task-item:hover .delete-btn { opacity: 1; }
.delete-btn:hover { transform: scale(1.2); }
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); display: flex; justify-content: center; align-items: center; z-index: 1000; backdrop-filter: blur(5px); display: none; }
.modal-overlay.show { display: flex; }
.modal-content { background-color: var(--container-bg); padding: 30px; border-radius: 12px; width: 90%; max-width: 450px; text-align: center; }
.modal-content input { width: 100%; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; margin-bottom: 15px; box-sizing: border-box; }
.modal-content button { width: 100%; padding: 12px; border: none; background-color: var(--accent-color); color: white; font-size: 16px; border-radius: 8px; cursor: pointer; margin-bottom: 15px; }