/* --- General & Variables --- */
:root {
    --bg-color: #f4f7fc;
    --surface-color: #ffffff;
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --text-color: #333;
    --text-light: #666;
    --border-color: #cbd5e1; /* Darker border */
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --completed-color: #9ca3af;
    --danger-color: #EF4444;
    --pending-bg-color: #fff2f5; /* Light pink for pending tasks */
    --even-row-color: #f8fafc; /* More distinct even row color */
}

body {
    font-family: 'IBM Plex Sans Thai', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.hidden { display: none !important; }

/* Accessibility class to hide elements visually but keep them for screen readers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* --- Password Screen --- */
.password-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.password-box {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}
#password-input {
    font-size: 1.5rem;
    padding: 0.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 120px;
    margin-top: 1rem;
}
.error-message {
    color: var(--danger-color);
    font-size: 0.9rem;
    height: 1.2rem;
    margin-top: 0.5rem;
}

/* --- Main App Layout --- */
.container {
    max-width: 700px;
    margin: 2rem auto;
    padding: 0 1rem;
}
header {
    text-align: center;
    margin-bottom: 1rem;
}
.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
#app-title {
    margin: 0;
}
.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}
.icon-btn:hover {
    background-color: #e9ecef;
    color: var(--text-color);
}
#view-archive-btn {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}
#current-date {
    color: var(--text-light);
    font-size: 0.9rem; 
    margin-top: 0.25rem;
}

/* --- Task Sections & Lists --- */
#task-sections {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}
.section-title {
    font-size: 1.1rem; 
    margin: 0 0 1rem 0;
    color: var(--text-color);
    font-weight: 700;
}
/* Removed red color from pending title */
/* #overdue-tasks-section .section-title {
    color: var(--danger-color);
} */
.task-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.task-item {
    background: var(--surface-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px; 
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow);
    transition: all 0.2s ease-in-out;
}
/* Make task item clickable for editing */
.task-item:not(.completed) {
    cursor: pointer;
}
.task-item:not(.completed):hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 8px -1px rgb(59 130 246 / 0.2), 0 2px 4px -2px rgb(59 130 246 / 0.1);
}

/* Remove blue flash on click */
.task-item:focus, .task-item:focus-visible {
    outline: none;
}

/* Pending tasks background */
#overdue-list .task-item {
    background-color: var(--pending-bg-color);
}
#overdue-list .task-item:nth-child(even) {
    background-color: var(--pending-bg-color); /* Override even row color */
}


.task-item:nth-child(even) {
    background-color: var(--even-row-color); /* More distinct even color */
}
.task-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-grow: 1; 
    min-width: 0; 
}
.task-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.task-name-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-grow: 1;
    min-width: 0;
}
.task-name {
    font-size: 0.95rem;
    /* Allow wrapping for long text */
    white-space: normal;
    word-break: break-word;
}
.checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0; 
    background-color: transparent;
    padding: 0;
    z-index: 2; /* Make sure checkbox is clickable over the task item */
    position: relative;
}
.checkbox.checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'%3e%3cpath d='M12.736 3.97a.733.733 0 0 1 1.047 0c.286.289.29.756.01 1.05L7.88 12.01a.733.733 0 0 1-1.065.02L3.217 8.384a.757.757 0 0 1 0-1.06.733.733 0 0 1 1.047 0l3.052 3.093 5.4-6.425a.247.247 0 0 1 .02-.022Z'/%3e%3c/svg%3e");
}
.task-item.completed .task-name, .task-item.completed .task-date {
    text-decoration: line-through;
    color: var(--completed-color);
}
.task-date {
    font-size: 0.8rem;
    color: var(--text-light);
    background-color: var(--bg-color);
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
    font-weight: bold;
}
.tag {
    font-size: 0.75rem;
    font-weight: 100;
    padding: 3px 8px;
    border-radius: 12px;
    color: white;
    white-space: nowrap;
}

/* Completed Section Header */
.completed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.archive-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface-color);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}
.archive-btn:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}
.empty-state {
    text-align: center;
    color: var(--text-light);
    padding: 2rem;
    background-color: #f9fafb;
    border-radius: 8px;
}

/* --- Floating Action Button --- */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}
.fab:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: var(--surface-color);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 420px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
    margin: 0;
}
.close-modal-btn {
    position: static;
    transform: none;
}
.modal-content h2 {
    margin-top: 0;
}
#task-form, #add-tag-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
#task-form input, #task-form select, #add-tag-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    box-sizing: border-box;
}
.modal-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
}
button, .cancel-btn, .submit-btn {
    padding: 0.6rem 1rem;
    border-radius: 6px;
    border: none;
    font-size: 0.9rem;
    font-family: 'IBM Plex Sans Thai', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
}
.cancel-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-light);
}
.cancel-btn:hover {
    background-color: var(--bg-color);
}
.submit-btn, #save-task-btn {
    background-color: var(--primary-color);
    color: white;
}
.submit-btn:hover, #save-task-btn:hover {
    background-color: var(--primary-hover);
}


/* Tags Modal Specifics */
#tags-list {
    list-style: none;
    padding: 0;
    margin-bottom: 1rem;
    max-height: 200px;
    overflow-y: auto;
}
#tags-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}
.delete-tag-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Archive Modal Specifics */
.archive-list {
    max-height: 60vh;
    overflow-y: auto;
}
.task-item.archived {
    padding: 0.75rem 1rem;
}
.task-content-archived {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex-grow: 1;
    min-width: 0;
}
.task-meta-archived {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.task-actions-archived {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}
.restore-btn.icon-btn, .delete-btn.icon-btn {
    color: var(--text-light);
}
.restore-btn.icon-btn:hover {
    color: #22C55E;
}
.delete-btn.icon-btn:hover {
    color: var(--danger-color);
}

.archive-footer {
    text-align: center;
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}
.load-more-btn {
    background-color: var(--surface-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}
.load-more-btn:disabled {
    background-color: var(--bg-color);
    color: var(--text-light);
    cursor: not-allowed;
    border-color: var(--border-color);
}

/* Color Palette */
#color-palette {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s;
}
.color-swatch:hover {
    transform: scale(1.1);
}
.color-swatch.selected {
    border-color: var(--primary-color);
}