body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #e9f5ee;
}

.container {
    max-width: 500px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: black;
    margin-bottom: 20px;
}

.todo-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
}

.todo-input {
    display: flex;
}

input[type="text"] {
    flex: 1;
    padding: 10px;
    border: 2px solid grey;
    border-radius: 6px 0 0 6px;
    font-size: 16px;
    background-color: #f9fff9;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: black;
    color: white;
    border-radius: 0 6px 6px 0;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: grey;
}

#clearAllBtn {
    align-self: flex-end;
    background-color: #d32f2f;
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 6px;
}

#clearAllBtn:hover {
    background-color: #f44336;
}

.filters {
    display: flex;
    justify-content: space-between;
    margin: 10px 0;
}

.filter-btn {
    flex: 1;
    margin: 0 3px;
    padding: 8px;
    font-size: 14px;
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.filter-btn:hover {
    background-color: grey;
}

.filter-btn.active {
    background-color: black;
    color: white;
    border: none;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border: 2px solid #eee;
    border-radius: 6px;
    margin-bottom: 8px;
    background-color: #fdfdfd;
    transition: transform 0.2s ease;
}

li:hover {
    transform: scale(1.01);
}

.task-text {
    flex: 1;
    font-size: 16px;
    word-break: break-word;
    padding-right: 10px;
}

.task-text.completed {
    text-decoration: line-through;
    color: gray;
}

.btn-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.check-btn, .delete-btn, .edit-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.2s ease;
}

/* Specific buttons */
.check-btn {
    background-color: #a5d6a7;
    color: #2e7d32;
}

.check-btn:hover {
    background-color: #81c784;
}

.delete-btn {
    background-color: #ef9a9a;
    color: #b71c1c;
}

.delete-btn:hover {
    background-color: #e57373;
}

.edit-btn {
    background-color: #bbdefb;
    color: #0d47a1;
}

.edit-btn:hover {
    background-color: #90caf9;
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

.fade-out {
    animation: fadeOut 0.3s ease forwards;
}

.shake {
    animation: shake 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
    to { opacity: 0; transform: translateX(20px); height: 0; margin: 0; padding: 0; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
}

/* ====== Light Theme (default) ====== */
body.light-mode {
    background-color: #e9f5ee;
    color: black;
}
.light-mode .container {
    background-color: #ffffff;
}
.light-mode .filter-btn.active {
    background-color: black;
    color: white;
}

#themeToggleBtn {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 8px 12px;
    font-size: 14px;
    border-radius: 6px;
    z-index: 100;
    background-color: #444;
    color: white;
}

body.light-mode #themeToggleBtn {
    background-color: #f0f0f0;
    color: black;
}


/* ====== Dark Theme ====== */
body.dark-mode {
    background-color: #121212;
    color: #f5f5f5;
}
.dark-mode .container {
    background-color: #1e1e1e;
}
.dark-mode input[type="text"] {
    background-color: #2c2c2c;
    color: white;
    border-color: #444;
}
.dark-mode button {
    background-color: #333;
    color: white;
}
.dark-mode button:hover {
    background-color: #444;
}
.dark-mode .filter-btn {
    background-color: #222;
    border-color: #444;
    color: white;
}
.dark-mode .filter-btn.active {
    background-color: white;
    color: black;
}
.dark-mode li {
    background-color: #2c2c2c;
    border-color: #444;
}




/* Responsive */
@media (max-width: 600px) {
    .container {
        margin: 10px;
        padding: 15px;
    }

    input[type="text"], button {
        font-size: 14px;
    }

    .filter-btn {
        font-size: 12px;
        padding: 6px;
    }

    .check-btn, .delete-btn, .edit-btn {
        width: 28px;
        height: 28px;
    }

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