/**
 * SpeedSight Reader Screen Styles
 * RSVP reading interface and controls
 */

/* ========================================
   READER SCREEN BASE
   ======================================== */

.reader-screen {
    background-color: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: -webkit-fill-available;
    overflow: hidden;
    position: relative;
}

/* ========================================
   READER HEADER
   ======================================== */

.reader-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-primary);
    z-index: var(--z-sticky);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.reader-header.hidden {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
}

.reader-back-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--color-text-primary);
    transition: background-color var(--transition-fast);
}

.reader-back-button:hover {
    background-color: var(--color-bg-tertiary);
}

.reader-back-button svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.reader-doc-title {
    flex: 1;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: 0 var(--space-md);
}

.reader-progress-percent {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    min-width: 50px;
    text-align: right;
}

/* ========================================
   READER DISPLAY AREA
   ======================================== */

.reader-display-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl) var(--space-lg);
    position: relative;
    overflow: hidden;
    background-color: var(--color-bg-primary);
}

.reader-display-area.focus-mode {
    background-color: #000000;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
}

[data-theme="dark"] .reader-display-area.focus-mode {
    background-color: #000000;
}

.reader-context-prev,
.reader-context-next {
    font-family: var(--font-reader-latin);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    opacity: 0.5;
    text-align: center;
    padding: var(--space-sm) var(--space-lg);
    max-width: 80%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.reader-context-prev {
    margin-bottom: var(--space-md);
}

.reader-context-next {
    margin-top: var(--space-md);
}

.reader-display-area.focus-mode .reader-context-prev,
.reader-display-area.focus-mode .reader-context-next {
    display: none;
}

/* ========================================
   READER WORD CONTAINER
   ======================================== */

.reader-word-container {
    position: relative;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.reader-word {
    font-family: var(--font-reader-latin);
    font-size: var(--reader-word-size);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-align: center;
    line-height: 1.2;
    transition: opacity var(--duration-fast), transform var(--duration-fast);
    user-select: none;
    -webkit-user-select: none;
}

.reader-word.japanese {
    font-family: var(--font-reader-jp);
}

.reader-word.entering {
    animation: word-enter var(--duration-fast) var(--ease-out-cubic);
}

.reader-word.exiting {
    animation: word-exit 90ms var(--ease-in-cubic);
}

.reader-word.punctuation-hold {
    animation: word-punctuation-hold 400ms ease-in-out;
}

.reader-display-area.focus-mode .reader-word {
    color: #FFFFFF;
    font-size: clamp(3rem, 12vw, 6rem);
}

/* Multi-word display */
.reader-word.multi-word {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

.reader-word.multi-word span {
    display: inline-block;
}

/* ========================================
   READER CONTROLS CONTAINER
   ======================================== */

.reader-controls-container {
    padding: var(--space-lg);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border-primary);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    z-index: var(--z-sticky);
}

.reader-display-area.focus-mode ~ .reader-controls-container {
    display: none;
}

/* ========================================
   SECONDARY CONTROLS
   ======================================== */

.reader-secondary-controls {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.reader-control-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background-color: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    transition: all var(--transition-fast);
    min-width: 60px;
}

.reader-control-btn:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.reader-control-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* ========================================
   PRIMARY CONTROLS
   ======================================== */

.reader-primary-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
}

.reader-play-pause-btn {
    width: var(--play-button-size);
    height: var(--play-button-size);
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    position: relative;
}

.reader-play-pause-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.reader-play-pause-btn:active {
    transform: scale(0.95);
    animation: button-tap var(--duration-fast);
}

.reader-play-pause-btn svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.reader-play-pause-btn .pause-icon {
    display: none;
}

.reader-play-pause-btn.playing .play-icon {
    display: none;
}

.reader-play-pause-btn.playing .pause-icon {
    display: block;
}

.control-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    margin-top: var(--space-xs);
}

/* ========================================
   SETTINGS CONTROLS
   ======================================== */

.reader-settings-controls {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.speed-indicator {
    flex-direction: row;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    min-width: auto;
}

.speed-indicator:hover {
    background-color: var(--color-bg-tertiary);
}

.speed-value {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
}

.speed-unit {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.tts-toggle {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
}

.tts-toggle.active {
    background-color: var(--color-accent-glow);
    color: var(--color-accent);
}

.tts-toggle .tts-off-icon {
    display: none;
}

.tts-toggle.active .tts-on-icon {
    display: none;
}

.tts-toggle.active .tts-off-icon {
    display: block;
}

/* ========================================
   SPEED SLIDER OVERLAY
   ======================================== */

.speed-slider-overlay,
.start-from-overlay,
.word-selection-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-end;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
}

.speed-slider-overlay:not(.hidden),
.start-from-overlay:not(.hidden),
.word-selection-overlay:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.speed-slider-content,
.start-from-content,
.word-selection-content {
    width: 100%;
    background-color: var(--color-surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: var(--space-xl);
    max-height: 70vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform var(--transition-slow);
}

.speed-slider-overlay:not(.hidden) .speed-slider-content,
.start-from-overlay:not(.hidden) .start-from-content,
.word-selection-overlay:not(.hidden) .word-selection-content {
    transform: translateY(0);
}

.speed-slider-header,
.start-from-header,
.word-selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.speed-slider-header h3,
.start-from-header h3,
.word-selection-header h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.close-overlay-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    transition: background-color var(--transition-fast);
}

.close-overlay-btn:hover {
    background-color: var(--color-bg-tertiary);
}

.close-overlay-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Speed Presets */
.speed-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.speed-preset-btn {
    padding: var(--space-md);
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.speed-preset-btn:hover {
    background-color: var(--color-bg-tertiary);
}

.speed-preset-btn.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

/* Speed Slider */
.speed-slider-container {
    margin-bottom: var(--space-xl);
}

#speed-slider {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-full);
    background: linear-gradient(
        to right,
        var(--color-bg-tertiary) 0%,
        var(--color-accent) 50%,
        var(--color-error) 100%
    );
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

#speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

#speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

#speed-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

#speed-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
}

.speed-slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.speed-current-display {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
}

/* ========================================
   START FROM OVERLAY
   ======================================== */

.pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
}

.page-thumbnail {
    aspect-ratio: 1 / 1.4;
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.page-thumbnail:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.page-number {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.page-word-count {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.page-preview-text {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-align: center;
    margin-top: var(--space-sm);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

/* ========================================
   WORD SELECTION OVERLAY
   ======================================== */

.words-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-sm);
}

.word-item {
    padding: var(--space-md) var(--space-sm);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    word-break: break-word;
}

.word-item:hover {
    background-color: var(--color-accent-glow);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.word-item-index {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
}

/* ========================================
   UPLOAD FLOW
   ======================================== */

.upload-step {
    display: none;
}

.upload-step.active {
    display: block;
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-xl);
    color: var(--color-text-primary);
}

.upload-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.upload-option-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    background-color: var(--color-surface);
    border: 2px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-align: center;
}

.upload-option-btn:hover:not(:disabled) {
    border-color: var(--color-accent);
    background-color: var(--color-bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-option-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.upload-option-btn svg {
    width: 48px;
    height: 48px;
    fill: var(--color-accent);
}

.upload-option-btn span:first-of-type {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.upload-option-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.step-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    margin-top: var(--space-xl);
}

/* Configuration Items */
.config-item {
    margin-bottom: var(--space-xl);
}

.config-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.language-flag {
    font-size: var(--font-size-xl);
}

/* Processing */
.processing-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2xl);
    padding: var(--space-2xl) 0;
}

.processing-stage {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    max-width: 600px;
    overflow-x: auto;
    padding: var(--space-md);
}

.stage-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.stage-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-bg-tertiary);
    border: 2px solid var(--color-border-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-tertiary);
    transition: all var(--transition-base);
}

.stage-indicator.active .stage-icon {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
    animation: stage-indicator-active 2s ease-in-out infinite;
}

.stage-indicator.completed .stage-icon {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.stage-icon svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.stage-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-align: center;
    white-space: nowrap;
}

.stage-line {
    flex: 1;
    height: 2px;
    background-color: var(--color-border-primary);
    min-width: 20px;
}

.stage-indicator.active ~ .stage-indicator .stage-line,
.stage-indicator.completed ~ .stage-indicator .stage-line {
    background-color: var(--color-accent);
}

.processing-progress {
    width: 100%;
    max-width: 600px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-sm);
    font-size: var(--font-size-sm);
}

.progress-text {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

.progress-time {
    color: var(--color-text-tertiary);
}

/* ========================================
   PREVIEW PAGES MODAL
   ======================================== */

.preview-pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-lg);
    padding: var(--space-md);
}

/* ========================================
   LOGIN MODAL
   ======================================== */

.login-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.login-provider-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    width: 100%;
}

.provider-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.login-note {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: var(--space-md);
    line-height: var(--line-height-relaxed);
}

/* ========================================
   PRIVACY & TERMS MODAL
   ======================================== */

.privacy-terms-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border-primary);
    margin-bottom: var(--space-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--space-md);
    background: transparent;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text-primary);
}

.tab-btn.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.privacy-terms-content {
    max-height: 60vh;
    overflow-y: auto;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    margin-bottom: var(--space-md);
}

.tab-content h4 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.tab-content p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.tab-content em {
    color: var(--color-text-tertiary);
}

/* ========================================
   DONATE MODAL
   ======================================== */

.donate-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.donate-amount-btn {
    width: 100%;
    font-size: var(--font-size-lg);
    padding: var(--space-lg);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 640px) {
    .reader-word {
        font-size: clamp(2rem, 10vw, 3.5rem);
    }
    
    .speed-presets {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .words-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }
    
    .reader-primary-controls {
        gap: var(--space-lg);
    }
    
    .reader-play-pause-btn {
        width: 56px;
        height: 56px;
    }
}

@media (max-width: 400px) {
    .reader-controls-container {
        padding: var(--space-md);
    }
    
    .reader-secondary-controls,
    .reader-settings-controls {
        gap: var(--space-md);
    }
    
    .processing-stage {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    .reader-display-area {
        padding: var(--space-md);
    }
    
    .reader-controls-container {
        padding: var(--space-sm) var(--space-md);
        gap: var(--space-sm);
    }
    
    .reader-secondary-controls {
        display: none;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .reader-word.entering,
    .reader-word.exiting,
    .reader-word.punctuation-hold {
        animation: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .reader-word {
        text-shadow: 0 0 1px var(--color-text-primary);
    }
    
    .reader-display-area.focus-mode .reader-word {
        text-shadow: 0 0 2px #FFFFFF;
    }
}