* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    user-select: none;

}

body {
    /* font-family: "Montserrat", sans-serif; */
    font-family: "Poppins", sans-serif;
    padding: 40px 0;
    color: #333;
    background-color: linear-gradient(135deg, #dfe9f3 0%, #ffffff 100%);

}


h1.display-5,
h1.display-6 {
    font-weight: 700;
    color: #343a40;
}

.card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    background: transparent;
}

.form-control {
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid #ced4da;
    transition: 0.3s;
}

.form-control:focus {
    border-color: #198754;
    box-shadow: 0 0 0 3px rgba(25, 135, 84, 0.25);
}

#add_task_btn {
    margin-top: 15px;
    padding: 12px;
    font-weight: bold;
    font-size: 16px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #198754, #28a745);
    color: white;
    transition: background 0.3s, transform 0.2s;
}

#add_task_btn:hover {
    transform: scale(1.02);
    background: linear-gradient(135deg, #157347, #218838);
}

#AllTasks .task {
    color: #fff;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
    font-weight: 500;
    transition: 0.3s ease;
    cursor: pointer;
    position: relative;
}

.task.checked {
    opacity: 0.6;
    text-decoration: line-through;
    background-color: #ced4da !important;
    color: #333;
}


.task i {
    font-size: 18px;
    cursor: pointer;
}

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

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

.task {
    animation: fadeIn 0.4s ease-in-out;
}


.none {
    display: none;
}

.delete_all_tasks {
    padding: 0 16px;
}

.delete_all_btn {
    border-radius: 10px;
    font-weight: bold;
    padding: 10px;
    background-color: #dc3545;
    border: none;
    transition: transform 0.2s;
}

.delete_all_btn:hover {
    transform: scale(1.03);
    background-color: #c82333;
}

.alert-danger {
    border-radius: 12px;
    font-weight: bold;
    text-align: center;
}

.modal {
    display: none;
    background-color: rgba(0, 0, 0, 0.5);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

.modal-dialog {
    margin-top: 10%;
    border-radius: 16px;
}

.modal-content {
    border-radius: 16px;
    padding: 20px;
}

.modal-header h1 {
    font-size: 20px;
}

.modal-footer button {
    border-radius: 10px;
}

.delete {
    animation: wiggle .5s infinite ease-in-out;
}

@keyframes wiggle {
    0% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(-5deg);
    }

    50% {
        transform: rotate(5deg);
    }

    75% {
        transform: rotate(-3deg);
    }

    100% {
        transform: rotate(0deg);
    }
}


.card-header {
    padding: 16px;
    font-weight: 600;
    font-size: 18px;
    background-color: #f8f9fa;
    border-bottom: 1px solid transparent;
    background: transparent;
}

.task-info {
    font-size: 16px;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
}

@media (max-width: 800px) {
    .card-header {
        flex-direction: column !important;
        align-items: center !important;
    }

    .task-info {
        font-size: 14px;
    }
}

.change-bg-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999;
    padding: 10px 18px;
    font-weight: 300;
    font-size: 14px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease, background-color 0.3s ease;
    background-color: rgb(255, 213, 0);
    border: 0px solid transparent;
}

.change-bg-btn:hover {
    transform: scale(1.02);
    background-color: rgb(205, 170, 0);
}

@media (max-width: 800px) {
    .change-bg-btn {
        top: auto;
        bottom: 20px;
        right: 50%;
        transform: translateX(50%);
        font-size: 13px;
        padding: 9px 16px;
    }

    .change-bg-btn:hover {
        transform: translateX(50%) scale(1.05);
    }
}

.validation_style{
    font-size: 12px;
    font-weight: 300 !important;
    color: red;
    text-align: center;
    margin-top: 10px;
    padding: 0;
    display: none;
}