/* E-reader friendly styles with high contrast and simple design */
:root {
    /* Light mode (default) */
    --bg-color: #ffffff;
    --text-color: #000000;
    --light-gray: #e0e0e0;
    --medium-gray: #707070;
    --completed-color: #aaaaaa;
    --focus-color: #111111;
    --accent-color: #333333;
}

/* Disable all animations and transitions for the entire document */
*, *::before, *::after {
    animation: none !important;
    transition: none !important;
}

/* Dark mode */
.dark-mode {
    --bg-color: #121212;
    --text-color: #f0f0f0;
    --light-gray: #333333;
    --medium-gray: #999999;
    --completed-color: #666666;
    --focus-color: #f0f0f0;
    --accent-color: #bbbbbb;
}

/* Removed prefers-color-scheme media query as it interferes with manual toggle */

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

body {
    font-family: 'Bookerly', 'Palatino', 'Georgia', serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 0.75rem;
    max-width: 100%;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.date-display {
    font-size: 1rem;
    color: var(--medium-gray);
}

/* Form styles */
#task-form {
    display: flex;
    margin-bottom: 1.25rem;
}

#task-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    border: none;
    background-color: var(--bg-color);
    color: var(--text-color);
}

#add-task-btn {
    padding: 0.5rem 1.25rem;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    font-size: 0.95rem;
    cursor: pointer;
    font-weight: bold;
}

/* Task list styles */
.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.task-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    padding: 0.5rem 1rem;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 4px;
}

#task-list {
    list-style-type: none;
}

.task-item {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    align-items: center;
}

.empty-list {
    text-align: center;
    color: var(--medium-gray);
    font-style: italic;
}

.task-text {
    flex: 1;
    font-size: 1.1rem;
}

.completed .task-text {
    text-decoration: line-through;
    color: var(--completed-color);
}

.rolled-over .task-text::before {
    content: "↻ ";
    color: var(--accent-color);
}

.delete-btn {
    margin-left: 1rem;
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--medium-gray);
}

footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--medium-gray);
}

.checkbox-wrapper {
    display: inline-flex;
    align-items: center;
    margin-right: 1rem;
    position: relative;
    cursor: pointer;
}

.checkbox-wrapper input[type="checkbox"] {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    width: 1.5rem;
    height: 1.5rem;
    margin: 0;
    z-index: 1;
}

.checkbox-box {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--accent-color);
    border-radius: 0.2rem;
    background-color: var(--bg-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    color: var(--bg-color);
    cursor: pointer;
}

.checkbox-wrapper input[type="checkbox"]:focus + .checkbox-box {
    outline: 2px solid var(--focus-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-box {
    background-color: var(--accent-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkbox-box.fallback-check {
    color: var(--bg-color);
}

/* Focus states for accessibility */
a:focus, button:focus, input:focus {
    outline: 2px solid var(--focus-color);
}

/* Navigation links */
.nav-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}