:root {
    --bg-color: #f9f9fb;
    --card-color: #ffffff;
    --text-color: #333;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --danger: #ef4444;
    --border-radius: 12px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    --input-bg: #f3f4f6;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

main {
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 24px;
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent);
}

.todo-app {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn {
    background: var(--accent);
    color: #fff;
    padding: 12px 16px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s ease;
}

.btn:hover {
    background: var(--accent-hover);
}

.large-btn {
    align-self: center;
    width: 100%;
}

.close-task-form-btn {
    background: none;
    border: none;
    cursor: pointer;
}

.close-icon {
    width: 24px;
    height: 24px;
    fill: var(--danger);
}

.task-form {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 10;
}

.task-form-header {
    display: flex;
    justify-content: flex-end;
}

.task-form-body label {
    font-weight: 600;
    margin-bottom: 4px;
}

.form-control {
    background: var(--input-bg);
    border: none;
    border-radius: var(--border-radius);
    padding: 10px;
    width: 100%;
    font-size: 1rem;
}

textarea.form-control {
    resize: vertical;
}

.task-form-footer {
    text-align: center;
}

.hidden {
    display: none;
}

#tasks-container {
    max-height: 300px;
    overflow-y: auto;
}

.task {
    background: var(--input-bg);
    padding: 12px;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    box-shadow: var(--shadow);
}

.task p:last-of-type {
    margin-bottom: 10px;
}

#confirm-close-dialog {
    background: var(--card-color);
    padding: 20px;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 90%;
    max-width: 300px;
    text-align: center;
}

.discard-message-text {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 500;
}

.confirm-close-dialog-btn-container {
    display: flex;
    justify-content: space-around;
}

@media (min-width: 576px) {
    .task-form {
        max-height: 80vh;
    }
}