:root {
    --primary: #4a90e2;
    --success: #2ecc71;
    --danger: #e74c3c;
    --bg:#16664b;
    --card: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background-color: var(--bg);
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.app-container {
    width: 100%;
    max-width: 450px;
    background: var(--card);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.progress-container-bg {
    background: #eee;
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
    margin-top: 8px;
}

#progress-fill {
  height: 100%; 
  width: 0%;
  background-color:var(--success); 
  border-radius:10px;
  transition: width 0.3s ease-in-out; 
}


.filter-section {
    display: flex;
    gap: 8px;
    margin: 20px 0;
}

.filter-btn {
    flex: 1;
    background: #f0f0f0;
    border: none;
    padding: 8px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
}

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

.tracker-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid #f0f0f0;
    gap: 12px;
}

.tracker-item.completed span {
    text-decoration: line-through;
    color: #bbb;
}

.delete-btn {
    margin-left: auto;
    background: none;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
}

.delete-btn:hover {
    background: var(--danger);
    color: white;
}
.input-section form {
    display: flex;
    gap: 10px;
    margin-bottom: 5px;
}

.tracker-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.tracker-item span {
    flex: 1;
    font-size: 1rem;
}


.input-section button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
}

.error-msg {
    color: var(--danger);
    font-size: 0.8rem;
    height: 1rem; 
}
#habit-list {
    list-style: none;
    padding: 0;
    margin: 0;
}