/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Theme - Retro Amber Monitor Colors */
    --color-bg: #000000;
    --color-text: #FFB000;
    --color-text-dim: #CC8C00;
    --color-highlight: #FFCC33;
    --color-glow: rgba(255, 176, 0, 0.3);
    
    /* Layout proportions */
    --header-height: 50px;
    --controls-height: 33.33vh;
}

/* Light Theme - Blue on Light Background */
body.light-theme {
    --color-bg: #E8F1F5;
    --color-text: #1E3A5F;
    --color-text-dim: #4A6B8A;
    --color-highlight: #2C5F8D;
    --color-glow: rgba(30, 58, 95, 0.2);
}

body {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--color-bg);
    color: var(--color-text);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

/* Allow text selection in paragraph display */
.paragraph-display,
.paragraph-content {
    user-select: text;
    -webkit-user-select: text;
}

/* Help Icon (Question Mark) - Top Left */
.help-icon {
    position: fixed;
    top: 15px;
    left: 15px;
    font-size: 30px;
    cursor: pointer;
    z-index: 1000;
    padding: 10px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-text);
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s, opacity 0.3s, visibility 0.3s;
}

.help-icon:hover {
    color: var(--color-bg);
    background-color: var(--color-text);
}

/* Search Icon - Top Left (between help and save icons) */
.search-icon {
    position: fixed;
    top: 15px;
    left: 75px;
    font-size: 28px;
    cursor: pointer;
    z-index: 1000;
    padding: 10px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-text);
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s, opacity 0.3s, visibility 0.3s;
}

.search-icon:hover {
    color: var(--color-bg);
    background-color: var(--color-text);
}

/* Save Icon - Top Left (next to search icon) */
.save-icon {
    position: fixed;
    top: 15px;
    left: 135px;
    font-size: 26px;
    cursor: pointer;
    z-index: 1000;
    padding: 10px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-text);
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s, opacity 0.3s, visibility 0.3s;
}

.save-icon:hover {
    color: var(--color-bg);
    background-color: var(--color-text);
}

/* Settings Icon (Hamburger Menu) */
.settings-icon {
    position: fixed;
    top: 15px;
    right: 15px;
    font-size: 30px;
    cursor: pointer;
    z-index: 1000;
    padding: 10px;
    transition: color 0.2s, opacity 0.3s, visibility 0.3s;
}

.settings-icon:hover {
    color: var(--color-highlight);
}

/* Hide hamburger when settings panel is open (controlled by JavaScript) */
.settings-icon.hidden-by-panel {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Settings Panel */
.settings-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background-color: var(--color-bg);
    border-left: 2px solid var(--color-text);
    z-index: 999;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.settings-panel.visible {
    transform: translateX(0);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.settings-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.close-button {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 36px;
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    line-height: 1;
}

.close-button:hover {
    color: var(--color-highlight);
}

.settings-content {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.setting-group {
    margin-bottom: 25px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--color-text-dim);
}

.setting-group input,
.setting-group select {
    width: 100%;
    padding: 10px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-text);
    color: var(--color-text);
    font-size: 16px;
    font-family: 'Courier New', Courier, monospace;
}

.theme-select {
    cursor: pointer;
}

.save-button,
.load-new-text-button {
    width: 100%;
    padding: 12px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    color: var(--color-text);
    font-size: 16px;
    cursor: pointer;
    font-family: 'Courier New', Courier, monospace;
    transition: all 0.2s;
}

.save-button:hover,
.load-new-text-button:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

.load-new-text-button,
.my-library-button {
    margin-top: 10px;
}

.my-library-button {
    margin-bottom: 15px;
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 2px solid var(--color-text);
    position: relative;
    padding-left: 45px;
}

.my-library-button::before {
    content: '📚';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.my-library-button:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

/* Library Panel */
.library-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
}

.library-panel.visible {
    display: block;
}

.library-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.library-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.library-content {
    padding: 20px;
    max-height: calc(80vh - 140px);
    overflow-y: auto;
}

.library-list {
    margin-bottom: 20px;
}

.library-item {
    padding: 15px;
    border: 1px solid var(--color-text-dim);
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.library-item:hover {
    background-color: rgba(255, 176, 0, 0.1);
    border-color: var(--color-text);
}

.library-item-content {
    flex: 1;
    min-width: 0;
}

.library-item-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.library-item-meta {
    font-size: 12px;
    color: var(--color-text-dim);
}

.library-item-delete {
    background: none;
    border: none;
    color: var(--color-text-dim);
    font-size: 24px;
    cursor: pointer;
    padding: 5px 10px;
    margin-left: 10px;
    transition: color 0.2s;
    flex-shrink: 0;
}

.library-item-delete:hover {
    color: var(--color-highlight);
}

.library-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-dim);
}

.library-empty p {
    margin-bottom: 10px;
    font-size: 14px;
}

.storage-usage {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-text-dim);
    text-align: center;
}

.storage-usage p {
    font-size: 12px;
    color: var(--color-text-dim);
}

/* Save to Library Panel */
.save-to-library-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
}

.save-to-library-panel.visible {
    display: block;
}

.save-to-library-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.save-to-library-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.save-to-library-content {
    padding: 20px;
}

/* Help Panel */
.help-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
    overflow-y: auto;
}

.help-panel.visible {
    display: block;
}

.help-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.help-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.help-content {
    padding: 20px;
    line-height: 1.6;
}

.help-content h3 {
    font-size: 18px;
    color: var(--color-text);
    margin-top: 15px;
    margin-bottom: 10px;
}

.help-content h3:first-child {
    margin-top: 0;
}

.help-content p {
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 15px;
}

.help-content strong {
    color: var(--color-highlight);
}

.help-title {
    font-size: 28px;
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--color-text);
    font-weight: 400;
}

.rsvp-letter {
    font-weight: 700;
    color: var(--color-highlight);
    font-size: 1.1em;
}

/* Text Input Panel */
.text-input-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
}

.text-input-panel.visible {
    display: block;
}

.text-input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.text-input-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.text-input-content {
    padding: 20px;
}

.text-input-content textarea {
    width: 100%;
    height: 300px;
    padding: 15px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-text);
    color: var(--color-text);
    font-size: 14px;
    font-family: 'Courier New', Courier, monospace;
    resize: vertical;
}

.load-button {
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    color: var(--color-text);
    font-size: 16px;
    cursor: pointer;
    font-family: 'Courier New', Courier, monospace;
    transition: all 0.2s;
}

.load-button:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

/* Search Panel */
.search-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
}

.search-panel.visible {
    display: block;
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.search-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.search-content {
    padding: 20px;
    max-height: calc(80vh - 100px);
    overflow-y: auto;
}

.search-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-input-group input {
    flex: 1;
    padding: 10px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-text);
    color: var(--color-text);
    font-size: 16px;
    font-family: 'Courier New', Courier, monospace;
}

.search-button {
    padding: 10px 20px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    color: var(--color-text);
    font-size: 16px;
    cursor: pointer;
    font-family: 'Courier New', Courier, monospace;
    transition: all 0.2s;
}

.search-button:hover:not(:disabled) {
    background-color: var(--color-text);
    color: var(--color-bg);
}

.search-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--color-text-dim);
    color: var(--color-text-dim);
}

.search-results {
    min-height: 200px;
}

.search-results-list {
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    padding: 12px;
    border: 1px solid var(--color-text-dim);
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.6;
}

.search-result-item:hover {
    background-color: rgba(255, 176, 0, 0.1);
    border-color: var(--color-text);
}

.search-result-item mark {
    background-color: rgba(255, 176, 0, 0.3);
    color: var(--color-text);
    padding: 2px 0;
}

.search-no-results {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-dim);
}

.search-prompt {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-dim);
}

/* Main App Container */
.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Section: Word Display */
.word-display {
    flex: 0 0 33.33vh;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--color-text-dim);
}

.current-word {
    font-size: clamp(40px, 12vw, 120px);
    font-weight: bold;
    text-align: center;
    padding: 20px;
    text-shadow: 0 0 10px var(--color-glow);
}

/* Middle Section: Paragraph Display */
.paragraph-display {
    flex: 0 0 33.33vh;
    overflow-y: auto;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.paragraph-display .paragraph-content {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.paragraph-display.visible .paragraph-content {
    opacity: 1;
    visibility: visible;
}

.paragraph-content {
    font-size: 16px;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.sentence {
    display: inline;
}

.sentence.current {
    background-color: rgba(255, 176, 0, 0.2);
    box-shadow: 0 0 10px var(--color-glow);
    padding: 2px 0;
}

/* Bottom Section: Controls */
.controls-area {
    flex: 0 0 33.33vh;
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;
    gap: 0;
}

.control-region {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
    border: 1px solid var(--color-text-dim);
}

.control-region:active {
    background-color: rgba(255, 176, 0, 0.1);
}

.control-icon {
    font-size: 36px;
    color: var(--color-text);
    transition: color 0.2s;
}

.control-region:hover .control-icon {
    color: var(--color-highlight);
}

/* Document title display */
.document-title {
    grid-column: 1;
    grid-row: 1;
    display: flex;
    align-items: center;
    padding: 5px 10px;
    font-size: 12px;
    line-height: 1.3;
    color: var(--color-text-dim);
    overflow-wrap: break-word;
    word-wrap: break-word;
    border: 1px solid var(--color-text-dim);
    transition: opacity 0.3s, visibility 0.3s;
}

.document-title.hidden {
    opacity: 0;
    visibility: hidden;
}

/* Grid positioning for controls */
.control-up {
    grid-column: 2;
    grid-row: 1;
}

.control-left {
    grid-column: 1;
    grid-row: 2;
}

.control-center {
    grid-column: 2;
    grid-row: 2;
    background-color: rgba(255, 176, 0, 0.05);
}

.control-center .control-icon {
    font-size: 48px;
}

.control-right {
    grid-column: 3;
    grid-row: 2;
}

.control-down {
    grid-column: 2;
    grid-row: 3;
}

/* Page Up/Down Controls (paused only) */
.control-page-up {
    grid-column: 3;
    grid-row: 1;
}

.control-page-down {
    grid-column: 3;
    grid-row: 3;
}

/* Combined Stats Display (replaces separate speed and progress) */
.combined-stats {
    position: absolute;
    bottom: 10px;
    left: 10px;
    font-size: 11px;
    color: var(--color-text-dim);
    padding: 4px 6px;
    background-color: var(--color-bg);
    line-height: 1.2;
    cursor: pointer;
    transition: color 0.2s;
}

.combined-stats:hover {
    color: var(--color-text);
}

.combined-stats.hidden {
    display: none;
}

/* Progress Detail Panel */
.progress-detail-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 400px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    z-index: 998;
    display: none;
}

.progress-detail-panel.visible {
    display: block;
}

.progress-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--color-text-dim);
}

.progress-detail-header h2 {
    font-size: 24px;
    color: var(--color-text);
}

.progress-detail-content {
    padding: 30px 20px;
    text-align: center;
}

.progress-detail-line {
    font-size: 18px;
    color: var(--color-text);
    margin-bottom: 20px;
    line-height: 1.5;
}

.progress-detail-line:last-child {
    margin-bottom: 0;
}

/* No Text Message */
.no-text-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
}

.no-text-message.hidden {
    display: none;
}

.no-text-message p {
    font-size: 24px;
    margin-bottom: 20px;
}

.load-text-prompt {
    padding: 15px 30px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-text);
    color: var(--color-text);
    font-size: 18px;
    cursor: pointer;
    font-family: 'Courier New', Courier, monospace;
    transition: all 0.2s;
}

.load-text-prompt:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Scrollbar Styling */
.paragraph-display::-webkit-scrollbar {
    width: 8px;
}

.paragraph-display::-webkit-scrollbar-track {
    background: var(--color-bg);
}

.paragraph-display::-webkit-scrollbar-thumb {
    background: var(--color-text-dim);
}

.paragraph-display::-webkit-scrollbar-thumb:hover {
    background: var(--color-text);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .settings-panel {
        width: 100%;
    }
    
    .text-input-panel {
        width: 95%;
    }
    
    .current-word {
        font-size: clamp(30px, 10vw, 80px);
    }
    
    .paragraph-content {
        font-size: 14px;
    }
    
    .control-icon {
        font-size: 28px;
    }
    
    .control-center .control-icon {
        font-size: 36px;
    }
    
    /* Smaller font on mobile */
    .speed-display {
        font-size: 14px;
        padding: 4px 8px;
        bottom: 5px;
        left: 5px;
    }
}

/* Prevent text selection on touch devices */
@media (pointer: coarse) {
    * {
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        user-select: none;
    }
}