/* style.css - 墨水屏学习机单屏原型样式表 */

/* Global Reset & Base Variables */
:root {
  --eink-black: #111111;
  --eink-dark: #333333;
  --eink-gray: #666666;
  --eink-light-gray: #999999;
  --eink-border-gray: #b0b0b0;
  --eink-bg-gray: #e6e6e6;
  --eink-paper: #f4f3ee;
  --eink-paper-darker: #eae9e2;
  --device-bezel: #3a3b3c;
  --device-shadow: rgba(0, 0, 0, 0.4);
  
  --font-serif: 'Lora', 'Noto Serif SC', Georgia, serif;
  --font-sans: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: #1a1b1f;
  color: var(--eink-black);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* Workspace Layout */
.workspace {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 40px;
  width: 100%;
  max-width: 1050px;
  height: 90vh;
  padding: 20px;
}

/* 1. Device Container (Left) */
.device-container {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.eink-device {
  width: 530px;
  height: 720px;
  background-color: var(--device-bezel);
  border-radius: 28px;
  padding: 25px 25px 55px 25px; /* bottom bezel is taller for physical button */
  box-shadow: 0 25px 50px -12px var(--device-shadow),
              inset 0 2px 4px rgba(255, 255, 255, 0.2),
              inset 0 -4px 10px rgba(0, 0, 0, 0.4);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Camera Dot */
.device-camera {
  position: absolute;
  top: 9px;
  width: 7px;
  height: 7px;
  background-color: #111;
  border-radius: 50%;
  box-shadow: inset 0 1px 1px rgba(255,255,255,0.1);
}

/* Screen Wrapper to maintain 3:4 aspect ratio */
.eink-screen-wrapper {
  width: 480px;
  height: 640px; /* Exact 3:4 */
  background-color: var(--eink-paper);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 3px 6px rgba(0,0,0,0.3),
              0 1px 1px rgba(255,255,255,0.1);
  border: 2px solid #2a2a2a;
}

.eink-screen {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0;
  user-select: none;
}

/* Paper texture simulation */
.paper-texture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image: radial-gradient(rgba(0,0,0,0.015) 1px, transparent 0),
                    radial-gradient(rgba(0,0,0,0.01) 1px, transparent 0);
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
  opacity: 0.8;
  z-index: 10;
}

/* E-Ink Refresh Flash Layer */
.eink-refresh-flash {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--eink-black);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
}

.eink-refresh-flash.flashing {
  animation: eink-flash-anim 0.35s ease-in-out forwards;
}

@keyframes eink-flash-anim {
  0% { opacity: 0; }
  25% { opacity: 1; background-color: var(--eink-black); }
  55% { opacity: 1; background-color: #ffffff; }
  75% { opacity: 0.4; background-color: var(--eink-light-gray); }
  100% { opacity: 0; }
}

/* Simulated screen ghosting layer */
.ghost-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.04; /* Very faint ghosting */
  z-index: 5;
  filter: contrast(0.5) blur(0.5px);
}

/* Bottom Bezel physical home button */
.device-home-btn {
  position: absolute;
  bottom: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle, #4a4b4c 0%, #2f3031 100%);
  border: 1px solid #1c1d1e;
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.1),
              0 1px 3px rgba(0,0,0,0.5);
  cursor: pointer;
  transition: active 0.1s;
}

.device-home-btn:active {
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.8);
}

/* 2. Top Status Bar */
.status-bar {
  height: 28px;
  border-bottom: 1px solid var(--eink-border-gray);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 14px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-center {
  font-weight: 700;
}

.wifi-icon, .battery-icon {
  display: inline-flex;
  align-items: center;
}

.battery-icon {
  width: 16px;
  height: 9px;
  border: 1px solid var(--eink-black);
  padding: 1px;
  border-radius: 1px;
  position: relative;
}

.battery-icon::after {
  content: '';
  position: absolute;
  right: -3px;
  top: 2px;
  width: 2px;
  height: 3px;
  background-color: var(--eink-black);
}

.battery-level {
  display: block;
  height: 100%;
  width: 85%; /* static mockup */
  background-color: var(--eink-black);
}

/* SVG icons styling inside status bar */
.svg-icon {
  width: 13px;
  height: 13px;
  fill: var(--eink-black);
}

.svg-icon-sm {
  width: 12px;
  height: 12px;
  fill: var(--eink-black);
}

/* 3. Header Navigation & Progress */
.header-nav {
  height: 48px;
  border-bottom: 2px solid var(--eink-black);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  background-color: var(--eink-paper);
}

.nav-back-btn {
  background: none;
  border: none;
  width: 34px;
  height: 34px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.nav-back-btn .svg-icon {
  width: 20px;
  height: 20px;
}

.nav-back-btn:active {
  background-color: var(--eink-bg-gray);
}

.progress-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.progress-text {
  font-size: 11px;
  font-weight: 700;
  color: var(--eink-dark);
}

.progress-dots {
  font-size: 11px;
  font-weight: 700;
  color: var(--eink-dark);
  margin-top: 2px;
  line-height: 1;
  letter-spacing: 0.5px;
}

/* 进度分数显示样式 (如 1/6) */
.progress-fraction {
  font-size: 12px;
  font-weight: 700;
  color: var(--eink-dark);
  margin-top: 2px;
  line-height: 1;
  font-family: monospace;
}

.progress-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--eink-black);
  background-color: transparent;
}

.progress-dot.active {
  background-color: var(--eink-black);
}

.progress-dot.completed {
  background-color: var(--eink-black);
  position: relative;
}

/* 4. Screen Main Frame */
.screen-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 16px;
  overflow: hidden;
}

/* Audio Player Section */
.audio-player-card {
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 2px 2px 0px var(--eink-black);
}

/* Lightweight audio player for sentence page */
.sentence-audio-player {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  border-bottom: 1px dashed var(--eink-border-gray);
  margin-bottom: 16px;
}

.audio-play-btn-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--eink-black);
  background-color: var(--eink-paper);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  outline: none;
  transition: all 0.1s ease;
  padding: 0;
}

.audio-play-btn-sm:active {
  background-color: var(--eink-bg-gray);
}

.audio-play-btn-sm .svg-icon {
  width: 16px;
  height: 16px;
  fill: var(--eink-black);
}

.audio-info-sm {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.audio-title-sm {
  font-size: 11px;
  font-weight: 700;
  color: var(--eink-dark);
}

.audio-progress-bar-sm {
  height: 4px;
  background-color: var(--eink-border-gray);
  border-radius: 2px;
  overflow: hidden;
  width: 100%;
}

.audio-progress-sm {
  height: 100%;
  background-color: var(--eink-black);
  width: 0%;
}

.audio-count-sm {
  font-size: 10.5px;
  color: var(--eink-gray);
  font-weight: 700;
}

.audio-play-btn,
.sentence-record-panel .record-btn,
.dialogue-mic-icon-container {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--eink-black);
  background-color: var(--eink-paper);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  outline: none;
  transition: all 0.1s ease;
  box-shadow: 2px 2px 0px var(--eink-black);
}

.audio-play-btn:active,
.sentence-record-panel .record-btn:active,
.dialogue-mic-icon-container:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--eink-black);
  background-color: var(--eink-bg-gray);
}

.audio-play-btn .svg-icon,
.sentence-record-panel .record-btn .svg-icon,
.dialogue-mic-icon-container .svg-icon {
  width: 20px;
  height: 20px;
  fill: var(--eink-black);
  transition: fill 0.1s ease;
}

.record-btn.recording,
.dialogue-mic-icon-container.recording {
  background-color: var(--eink-black) !important;
  border-color: var(--eink-black) !important;
  animation: record-glow 1.5s infinite ease-in-out;
}

.record-btn.recording .svg-icon,
.dialogue-mic-icon-container.recording .svg-icon {
  fill: #ffffff !important;
}

.audio-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.audio-title {
  font-size: 13px;
  font-weight: 700;
}

.audio-progress-bar {
  height: 4px;
  background-color: var(--eink-bg-gray);
  position: relative;
}

.audio-progress {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background-color: var(--eink-black);
}

.audio-meta {
  font-size: 11px;
  color: var(--eink-gray);
  font-weight: 700;
}

.hidden {
  display: none !important;
}

/* Question Prompt */
.question-prompt {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 4px;
  border-left: 3px solid var(--eink-black);
  padding-left: 8px;
}

/* Question container space */
.question-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Switchable Panels */
.mode-panel {
  display: none;
  flex: 1;
  flex-direction: column;
  justify-content: center;
}

.mode-panel.active {
  display: flex;
}

/* Mode A: Handwriting grid stylesheet */
.canvas-wrapper {
  border: 2px dashed var(--eink-border-gray);
  background-color: #ffffff;
  position: relative;
  height: 200px;
  width: 100%;
  overflow: hidden;
  box-shadow: inset 1px 1px 3px rgba(0,0,0,0.05);
}

.four-line-guide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px; /* Space between lines */
  padding: 0 10px;
}

.guide-line {
  border-top: 1px dotted var(--eink-border-gray);
  width: 100%;
}

.guide-line.line-3 {
  border-top: 1px dashed var(--eink-gray); /* Baseline is stronger */
}

#handwritingCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  z-index: 2;
}

.canvas-placeholder {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--eink-light-gray);
  pointer-events: none;
  font-style: italic;
  z-index: 1;
}

.canvas-controls {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

/* Alternative keyboard input for write mode */
.keyboard-input-wrapper {
  background-color: #ffffff;
  border: 2px solid var(--eink-black);
  padding: 8px;
  display: flex;
  margin-top: 10px;
  box-shadow: 2px 2px 0 var(--eink-black);
}

#textInput {
  width: 100%;
  border: none;
  outline: none;
  font-size: 15px;
  font-family: var(--font-serif);
  padding: 6px;
  color: var(--eink-black);
}

/* Mode B: Options Cards list */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.option-card {
  border: 1.5px solid var(--eink-border-gray);
  background-color: #ffffff;
  padding: 12px 14px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: background-color 0.1s;
}

.option-card:hover {
  background-color: var(--eink-paper-darker);
}

.option-card.selected {
  border: 2.5px solid var(--eink-black);
  background-color: var(--eink-bg-gray);
}

.option-prefix {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--eink-black);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  background-color: #ffffff;
}

.option-card.selected .option-prefix {
  background-color: var(--eink-black);
  color: #ffffff;
}

.option-text {
  font-size: 13px;
  font-weight: 500;
  flex: 1;
}

/* Option States after Submit */
.option-card.correct-ans {
  border: 2.5px solid var(--eink-black);
  background-color: #ffffff;
  position: relative;
}

.option-card.wrong-ans {
  border: 1.5px solid var(--eink-border-gray);
  opacity: 0.6;
  text-decoration: line-through;
}

.feedback-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border: 1.5px solid var(--eink-black);
  border-radius: 2px;
}

.feedback-badge.correct {
  background-color: var(--eink-black);
  color: #ffffff;
}

.feedback-badge.wrong {
  background-color: transparent;
  color: var(--eink-black);
}

/* Mode C: Oral跟读 target details */
.word-pron-target {
  text-align: center;
  padding: 12px 0;
  border-bottom: 1.5px dashed var(--eink-border-gray);
}

.word-pron-target .spelling {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.word-pron-target .phonetic {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--eink-gray);
  margin-top: 4px;
}

/* Pronunciation evaluation detail inside spelling text after rating */
.word-pron-target .word-split-eval {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  display: inline-flex;
  gap: 2px;
}

.word-split-eval span {
  padding: 0 1px;
}

/* In grayscale E-ink, correct/excellent can be normal, poor is underlined or boxed */
.word-split-eval span.score-perfect {
  color: var(--eink-black); /* default standard */
}

.word-split-eval span.score-good {
  color: var(--eink-dark);
}

.word-split-eval span.score-bad {
  border-bottom: 2px dashed var(--eink-black); /* dash underlined for error in e-ink */
  background-color: var(--eink-bg-gray);
  font-weight: 700;
}

.speech-recording-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex: 1;
}

/* Record Waveform */
.waveform-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 30px;
  width: 100%;
}

.waveform-bar {
  width: 3px;
  height: 6px;
  background-color: var(--eink-black);
  border-radius: 1px;
  animation: wave-pulse 1.2s infinite ease-in-out;
}

/* Staggered animation */
.waveform-bar.bar-1  { animation-delay: 0.1s; }
.waveform-bar.bar-2  { animation-delay: 0.3s; }
.waveform-bar.bar-3  { animation-delay: 0.5s; }
.waveform-bar.bar-4  { animation-delay: 0.2s; }
.waveform-bar.bar-5  { animation-delay: 0.4s; }
.waveform-bar.bar-6  { animation-delay: 0.6s; }
.waveform-bar.bar-7  { animation-delay: 0.1s; }
.waveform-bar.bar-8  { animation-delay: 0.3s; }
.waveform-bar.bar-9  { animation-delay: 0.5s; }
.waveform-bar.bar-10 { animation-delay: 0.2s; }

@keyframes wave-pulse {
  0%, 100% { height: 6px; }
  50% { height: 26px; }
}

.record-timer {
  font-size: 12px;
  font-weight: 700;
  margin-left: 8px;
  font-family: monospace;
}

.record-btn-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.record-trigger-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 3px solid var(--eink-black);
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  outline: none;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.record-trigger-btn:active {
  background-color: var(--eink-bg-gray);
}

.record-trigger-btn.recording {
  background-color: var(--eink-black);
  animation: record-glow 1.5s infinite ease-in-out;
}

@keyframes record-glow {
  0%, 100% { border-color: var(--eink-black); }
  50% { border-color: var(--eink-light-gray); }
}

.record-trigger-btn.recording .svg-icon {
  fill: #ffffff;
}

.record-trigger-btn .svg-icon {
  width: 26px;
  height: 26px;
}

.record-status-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--eink-dark);
}

/* 5. Bottom Main Action Bar */
.bottom-action-bar {
  height: 52px;
  border-top: 2px solid var(--eink-black);
  display: flex;
  padding: 8px 16px;
  gap: 12px;
  background-color: var(--eink-paper);
}

.eink-btn-outline {
  flex: 1;
  height: 100%;
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  color: var(--eink-black);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.eink-btn-outline:active {
  background-color: var(--eink-bg-gray);
}

.eink-btn-primary {
  flex: 2;
  height: 100%;
  border: 2px solid var(--eink-black);
  background-color: var(--eink-black);
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.eink-btn-primary:active {
  background-color: var(--eink-dark);
}

.eink-btn-secondary {
  border: 2px solid var(--eink-black);
  background-color: var(--eink-paper);
  color: var(--eink-black);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.1s ease-in-out;
  box-shadow: 2px 2px 0 var(--eink-black);
}

.eink-btn-secondary:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--eink-black);
  background-color: var(--eink-paper-darker);
}

.eink-btn-sm {
  border: 1.5px solid var(--eink-black);
  background-color: #ffffff;
  color: var(--eink-black);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.eink-btn-sm:active {
  background-color: var(--eink-bg-gray);
}

/* Welcome Instruction Overlay */
.welcome-overlay {
  position: absolute;
  top: 50px; /* Below header nav */
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--eink-paper);
  z-index: 15;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px 16px;
}

.welcome-overlay.hidden {
  display: none !important;
}

.welcome-panel {
  width: 100%;
  max-width: 320px;
  background-color: #ffffff;
  border: 2px solid var(--eink-black);
  box-shadow: 3px 3px 0px var(--eink-black);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.welcome-title {
  font-size: 14.5px;
  font-weight: 900;
  text-align: center;
  border-bottom: 2px solid var(--eink-black);
  padding-bottom: 8px;
  margin: 0;
  color: var(--eink-black);
}

.welcome-instructions {
  font-size: 12px;
  line-height: 1.6;
  color: var(--eink-black);
}

.welcome-instructions p {
  margin: 0 0 6px 0;
}

.welcome-instructions ul {
  margin: 0 0 12px 0;
  padding-left: 18px;
}

.welcome-instructions li {
  margin-bottom: 4px;
}

.welcome-tip {
  border-top: 1px dashed var(--eink-border-gray);
  padding-top: 8px;
  margin-top: 12px !important;
  color: var(--eink-dark) !important;
}

/* 6. Explanation Slide-up Sheet */
.explanation-sheet {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 70%;
  background-color: #ffffff;
  border-top: 3px solid var(--eink-black);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 -4px 15px rgba(0,0,0,0.15);
}

.explanation-sheet.active {
  transform: translateY(0);
}

.sheet-header {
  padding: 8px 16px 12px 16px;
  border-bottom: 1.5px solid var(--eink-black);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sheet-drag-handle {
  width: 36px;
  height: 4px;
  border-radius: 2px;
  background-color: var(--eink-border-gray);
  align-self: center;
  margin-bottom: 4px;
}

.sheet-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.answer-stamp {
  border: 2px solid var(--eink-black);
  padding: 2px 8px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.answer-stamp.correct {
  background-color: var(--eink-black);
  color: #ffffff;
}

.answer-stamp.wrong {
  background-color: transparent;
  color: var(--eink-black);
  border-style: double;
  border-width: 3px;
}

.sheet-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--eink-gray);
}

.sheet-close-btn {
  background: none;
  border: none;
  width: 24px;
  height: 24px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sheet-close-btn .svg-icon {
  width: 16px;
  height: 16px;
}

.sheet-content {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  user-select: text; /* allow copying text in explanation */
}

.word-header-block {
  display: flex;
  align-items: baseline;
  gap: 10px;
  border-bottom: 1px solid var(--eink-bg-gray);
  padding-bottom: 8px;
}

.word-spelling {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
}

.word-phonetics {
  font-size: 13px;
  color: var(--eink-gray);
}

/* Pronunciation Score Breakdowns */
.sheet-score-block {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--eink-paper);
  padding: 10px;
  border: 1px solid var(--eink-border-gray);
}

.score-number-box {
  display: flex;
  align-items: baseline;
}

.score-value {
  font-size: 24px;
  font-weight: 900;
  font-family: monospace;
}

.score-unit {
  font-size: 11px;
  font-weight: 700;
  margin-left: 2px;
}

.score-comment {
  font-size: 12px;
  font-weight: 700;
}

.info-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--eink-gray);
  letter-spacing: 0.5px;
}

.info-value {
  font-size: 13px;
  line-height: 1.4;
}

.text-bold {
  font-weight: 700;
}

.text-italic {
  font-style: italic;
  font-family: var(--font-serif);
  font-size: 14px;
  background-color: var(--eink-paper);
  padding: 3px 6px;
  display: inline-block;
  border-left: 2px solid var(--eink-black);
}

.sentence-box {
  background-color: var(--eink-paper);
  border: 1px solid var(--eink-border-gray);
  padding: 8px 10px;
}

.sentence-en {
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.35;
  font-weight: 500;
}

.sentence-zh {
  font-size: 12px;
  color: var(--eink-dark);
  margin-top: 4px;
  line-height: 1.3;
}

.full-width {
  width: 100%;
}

/* 2. Control Sidebar (Right) */
.control-sidebar {
  width: 400px;
  height: 100%;
  flex: 0 0 auto;
  background-color: #242529;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: #e4e6eb;
  overflow-y: auto;
  border: 1px solid #323338;
}

.sidebar-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.sidebar-header p {
  font-size: 12px;
  color: #a0a5b1;
  line-height: 1.4;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-bottom: 1px solid #323338;
  padding-bottom: 18px;
}

.control-group:last-of-type {
  border-bottom: none;
}

.control-group h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #a0a5b1;
  font-weight: 700;
}

.button-toggle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.control-btn {
  background-color: #323338;
  border: 1px solid #3e4047;
  color: #e4e6eb;
  padding: 8px 4px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.control-btn:hover {
  background-color: #3e4047;
}

.control-btn.active {
  background-color: #ffffff;
  color: #1a1b1f;
  border-color: #ffffff;
}

.control-select {
  background-color: #323338;
  border: 1px solid #3e4047;
  color: #e4e6eb;
  padding: 8px 12px;
  border-radius: 6px;
  outline: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.control-select:focus {
  border-color: #ffffff;
}

.help-text {
  font-size: 11px;
  color: #a0a5b1;
  font-style: italic;
}

.control-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: #d1d5db;
  cursor: pointer;
  user-select: none;
}

.control-checkbox-label input {
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.slider-group label {
  font-size: 12px;
  color: #d1d5db;
}

.control-range {
  width: 100%;
  accent-color: #ffffff;
  cursor: pointer;
}

.spec-notes {
  background-color: #2b2c31;
  border-left: 3px solid #666;
  padding: 10px 12px;
  border-radius: 0 4px 4px 0;
}

.spec-notes ul {
  padding-left: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spec-notes li {
  font-size: 11.5px;
  line-height: 1.45;
  color: #c9d1d9;
}

.spec-notes strong {
  color: #ffffff;
}

.sidebar-footer {
  margin-top: auto;
  text-align: center;
  font-size: 10.5px;
  color: #767c85;
  border-top: 1px solid #323338;
  padding-top: 14px;
}

/* Question Display Area (e-ink style card) */
.question-display-area {
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  padding: 14px;
  text-align: center;
  margin-bottom: 2px;
  box-shadow: 2px 2px 0px var(--eink-black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 70px;
}

.question-display-area .word-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--eink-black);
}

.question-display-area .meaning-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--eink-black);
}

.question-display-area .listening-placeholder {
  font-size: 14px;
  color: var(--eink-gray);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.question-display-area .listening-blanks {
  font-family: monospace;
  font-size: 18px;
  letter-spacing: 6px;
  font-weight: bold;
  margin-top: 4px;
  color: var(--eink-black);
}

/* ==========================================================================
   E-Ink Dashboard (听口主页) Styles
   ========================================================================== */

/* Page routing container */
.eink-page {
  display: flex;
  flex-direction: column;
  height: calc(100% - 28px); /* total height minus status-bar */
  width: 100%;
  position: relative;
}

.eink-page.hidden {
  display: none !important;
}

.dashboard-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
  overflow-y: auto;
}

/* Statistics Bar */
.stats-card {
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  padding: 12px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 2px 2px 0 var(--eink-black);
  cursor: pointer;
  transition: all 0.1s ease;
}

.stats-card:hover {
  background-color: var(--eink-paper-darker);
}

.stats-card:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--eink-black);
}

/* Overall Report Diagnoses styles */
.overall-diagnose-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.diagnose-card {
  border: 2px solid var(--eink-black);
  border-radius: 4px;
  padding: 10px 12px;
  background-color: #ffffff;
  box-shadow: 2px 2px 0 var(--eink-black);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.diagnose-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.diagnose-title {
  font-size: 12px;
  font-weight: 800;
  color: var(--eink-black);
}

.diagnose-badge {
  font-size: 10px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 3px;
  border: 1.5px solid var(--eink-black);
  background-color: #ffffff;
  color: var(--eink-black);
}

.diagnose-badge.completed {
  background-color: var(--eink-black);
  color: #ffffff;
}

.diagnose-info {
  font-size: 11px;
  color: var(--eink-gray);
  line-height: 1.4;
}

.diagnose-scores-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.diagnose-score-pill {
  font-size: 9.5px;
  font-weight: 700;
  padding: 1.5px 5px;
  border: 1px solid var(--eink-border-gray);
  border-radius: 2px;
  background-color: var(--eink-paper);
  color: var(--eink-dark);
}


.stats-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  text-align: center;
}

.stats-label {
  font-size: 10px;
  color: var(--eink-gray);
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.stats-number {
  font-size: 15px;
  font-weight: 900;
  font-family: monospace, var(--font-sans);
  color: var(--eink-black);
}

.stats-unit {
  font-size: 9px;
  font-weight: normal;
  margin-left: 1px;
  color: var(--eink-gray);
}

.stats-divider {
  width: 1px;
  height: 28px;
  background-color: var(--eink-border-gray);
}

/* Portals List */
.portals-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.portal-card {
  border: 1.5px solid var(--eink-border-gray);
  background-color: #ffffff;
  padding: 10px 12px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.1s;
}

.portal-card.locked {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: var(--eink-paper);
}

.portal-card.active {
  border: 2px solid var(--eink-black);
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--eink-black);
}

.portal-card.active:hover {
  background-color: var(--eink-paper-darker);
}

.portal-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.portal-card-icon {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--eink-black);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--eink-paper);
}

.portal-card-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--eink-black);
}

.portal-card-title-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.portal-card-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--eink-black);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lock-badge {
  font-size: 9px;
  font-weight: normal;
  border: 1px dashed var(--eink-light-gray);
  padding: 0 4px;
  border-radius: 2px;
  color: var(--eink-gray);
  background-color: var(--eink-bg-gray);
}

.portal-card-desc {
  font-size: 10.5px;
  color: var(--eink-gray);
  line-height: 1.3;
}

.portal-card-arrow {
  display: flex;
  align-items: center;
}

.portal-card-arrow svg {
  width: 18px;
  height: 18px;
  fill: var(--eink-black);
}

.portal-card-lock {
  display: flex;
  align-items: center;
}

.portal-card-lock svg {
  width: 15px;
  height: 15px;
  fill: var(--eink-light-gray);
}

/* Linear Progress Bar for active cards */
.portal-progress-bar-wrapper {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 2px;
  border-top: 1px dotted var(--eink-border-gray);
  padding-top: 6px;
}

.portal-progress-text {
  font-size: 9.5px;
  font-weight: 700;
  color: var(--eink-dark);
}

.portal-progress-bar {
  height: 5px;
  background-color: var(--eink-bg-gray);
  border: 1px solid var(--eink-border-gray);
  position: relative;
  overflow: hidden;
  border-radius: 1px;
}

.portal-progress {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background-color: var(--eink-black);
  transition: width 0.3s ease-out;
}

/* ==========================================================================
   E-Ink Listening Comprehension (听力理解) Styles
   ========================================================================== */

/* Sub-question Tabs Bar */
.listening-tabs-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 2px;
}

.listening-tab {
  flex: 1;
  text-align: center;
  border: 1.5px solid var(--eink-border-gray);
  background-color: #ffffff;
  padding: 6px 0;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 2px;
  position: relative;
}

.listening-tab.active {
  border: 2px solid var(--eink-black);
  background-color: var(--eink-bg-gray);
}

.listening-tab.answered::after {
  content: '●';
  font-size: 8px;
  color: var(--eink-black);
  position: absolute;
  top: 4px;
  right: 6px;
}

/* Dialogue Transcript Card */
.transcript-box {
  max-height: 140px;
  overflow-y: auto;
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.55;
  padding: 10px;
  border: 1.5px dashed var(--eink-border-gray);
  background-color: var(--eink-paper);
}

.transcript-line {
  margin-bottom: 6px;
}

.transcript-line:last-of-type {
  margin-bottom: 0;
}

.transcript-line strong {
  font-weight: 900;
  color: var(--eink-black);
  font-family: var(--font-sans);
  margin-right: 4px;
}

/* Listening score summary grid */
.listening-score-summary {
  border: 1px solid var(--eink-border-gray);
  background-color: var(--eink-paper);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.listening-score-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  font-weight: 700;
}

.listening-score-item .status-label {
  border: 1.5px solid var(--eink-black);
  padding: 1px 6px;
  font-size: 10px;
  font-weight: 900;
}

.listening-score-item .status-label.correct {
  background-color: var(--eink-black);
  color: #ffffff;
}

.listening-score-item .status-label.wrong {
  background-color: transparent;
  color: var(--eink-black);
  border-style: dotted;
}

/* Flat, borderless style for long listening questions */
.question-display-area.listening-flat {
  border: none !important;
  background-color: transparent !important;
  box-shadow: none !important;
  text-align: left;
  align-items: flex-start;
  padding: 10px 4px 14px 4px;
  min-height: auto;
  margin-bottom: 4px;
  border-bottom: 1.5px dashed var(--eink-border-gray) !important;
  border-radius: 0;
}

.question-display-area.listening-flat .meaning-title {
  text-align: left !important;
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--eink-black);
  width: 100%;
}

/* Custom E-Ink Alert Modal Dialog */
.eink-alert-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(17, 17, 17, 0.4); /* translucent overlay */
  z-index: 2000; /* above explanation sheets */
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
}

.eink-alert-dialog {
  width: 280px;
  background-color: var(--eink-paper);
  border: 3px solid var(--eink-black);
  padding: 16px;
  box-shadow: 5px 5px 0px var(--eink-black);
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: eink-pop 0.15s ease-out;
  box-sizing: border-box;
}

@keyframes eink-pop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.eink-alert-title {
  font-size: 13.5px;
  font-weight: 900;
  border-bottom: 2px solid var(--eink-black);
  padding-bottom: 4px;
  letter-spacing: 0.5px;
  text-align: left;
}

.eink-alert-message {
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--eink-dark);
  text-align: left;
}

.eink-alert-buttons {
  display: flex;
  justify-content: flex-end;
}

#einkAlertConfirmBtn {
  flex: none;
  width: auto;
  padding: 6px 16px;
  font-size: 11.5px;
}

/* Textbook & Unit Selection Styles */
.textbook-selector-bar {
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  box-shadow: 2px 2px 0 var(--eink-black);
  cursor: pointer;
}

.textbook-selector-bar:active {
  background-color: var(--eink-paper-darker);
}

.selector-bar-info {
  display: flex;
  align-items: center;
}

.selector-bar-btn {
  display: flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  border: 1px solid var(--eink-black);
  padding: 1px 6px;
  background-color: var(--eink-paper);
}

.portal-card.unit-locked {
  opacity: 0.5;
  background-color: var(--eink-paper);
  border: 1.5px dashed var(--eink-border-gray) !important;
  box-shadow: none !important;
}

.portal-card.unit-locked .portal-progress-bar-wrapper {
  visibility: hidden; /* keep space but hide progress text & bar */
}

/* Grid of selection options in the drawer */
.select-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.select-option-card {
  border: 1.5px solid var(--eink-border-gray);
  background-color: #ffffff;
  padding: 8px 4px;
  text-align: center;
  font-size: 10.5px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.1s;
}

.select-option-card:hover {
  background-color: var(--eink-paper-darker);
}

.select-option-card.active {
  border: 2px solid var(--eink-black);
  background-color: var(--eink-black);
  color: #ffffff;
}

/* ==========================================================================
   Oral Mouth-Practice (Sentence, Passage, Dialogue) Styles
   ========================================================================== */

/* Sentence Repetition Styles */
.sentence-instruction {
  font-size: 11.5px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--eink-dark);
}

.sentence-display-container {
  padding: 16px 8px;
  margin-bottom: 12px;
  text-align: left;
  border-bottom: 1px dotted var(--eink-border-gray);
}

.sentence-display-text {
  font-family: Georgia, serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--eink-black);
  font-weight: 700;
}

.sentence-translation-text {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--eink-gray);
  font-weight: normal;
  line-height: 1.4;
}

.sentence-record-panel {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: auto;
  margin-bottom: 6px;
  padding: 8px 18px;
  border: 1.5px solid var(--eink-black);
  border-radius: 28px;
  background-color: #ffffff;
  box-shadow: none;
}

.sentence-record-panel .record-btn {
  box-shadow: none !important;
  border-width: 1.5px !important;
}

/* record-btn style inherited globally from media controls */

.record-info-group {
  flex: 1;
}

.record-status {
  font-size: 11.5px;
  font-weight: 800;
}

.record-timer {
  font-size: 10px;
  color: #666;
  font-family: monospace;
}

.sentence-breakdown-box {
  font-family: Georgia, serif;
  font-size: 14.5px;
  line-height: 1.6;
  padding: 10px;
  border: 1px dashed var(--eink-border-gray);
  background-color: var(--eink-paper);
  max-height: 120px;
  overflow-y: auto;
}

.mispronounced-word {
  border-bottom: 2px dashed var(--eink-black);
  color: #666;
  cursor: pointer;
  padding-bottom: 1px;
}

/* Passage Reading Styles */
.passage-instruction {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--eink-dark);
}

.passage-display-card {
  padding: 14px 10px;
  margin-bottom: 14px;
  max-height: 380px;
  overflow-y: auto;
  border-bottom: 1px dotted var(--eink-border-gray);
}

.passage-title {
  font-size: 13.5px;
  font-weight: 900;
  margin-bottom: 8px;
  border-bottom: 1.5px solid var(--eink-black);
  padding-bottom: 4px;
}

.passage-paragraphs {
  font-family: Georgia, serif;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--eink-black);
}

.passage-sentence {
  cursor: pointer;
  padding: 2px 3px;
  transition: all 0.1s;
  border-bottom: 1.5px dotted transparent;
  margin-bottom: 4px;
  display: inline-block;
}

.passage-sentence:hover {
  border-bottom: 1.5px dotted var(--eink-black);
}

.passage-sentence.playing-highlight {
  background-color: var(--eink-bg-gray);
  color: var(--eink-black);
  font-weight: bold;
  border-bottom: 2px solid var(--eink-black);
  border-radius: 2px;
}

.passage-feedback-box {
  font-family: Georgia, serif;
  font-size: 13px;
  line-height: 1.6;
  padding: 8px;
  border: 1px dashed var(--eink-border-gray);
  background-color: var(--eink-paper);
  max-height: 130px;
  overflow-y: auto;
}

/* Dialogue Page Styles */
.dialogue-role-panel {
  display: flex;
  flex-direction: column;
  padding: 16px 8px;
  height: 100%;
}

.role-sub-title {
  font-size: 11.5px;
  margin-bottom: 16px;
  color: var(--eink-dark);
  font-weight: 700;
}

.role-card-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 4px;
}

.role-selection-prompt {
  font-size: 12px;
  font-weight: 700;
  color: var(--eink-dark);
  text-align: center;
  margin-bottom: 12px;
}

.role-select-card {
  border: 2px solid var(--eink-black);
  background-color: #ffffff;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--eink-black);
  transition: all 0.1s;
  outline: none;
  border-radius: 4px;
  width: 60px;
  height: 60px;
}

.role-select-card:hover {
  background-color: var(--eink-paper-darker);
}

.role-select-card.active {
  background-color: var(--eink-black);
  color: #ffffff;
}

.role-symbol {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 900;
}

.role-name {
  font-size: 11.5px;
  font-weight: 800;
  margin-bottom: 4px;
  text-align: center;
}

.role-label {
  font-size: 9px;
  opacity: 0.8;
}

.dialogue-chat-screen {
  display: flex;
  flex-direction: column;
  height: 100%;
  flex: 1;
  overflow: hidden;
}

.dialogue-feed {
  flex: 1;
  overflow-y: auto;
  padding: 10px 4px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-bottom: 1.5px solid var(--eink-black);
}

.chat-bubble {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  padding: 8px 12px;
  font-size: 14px;
  line-height: 1.55;
  border: 1.5px solid var(--eink-black);
  position: relative;
  box-sizing: border-box;
}

.chat-bubble.role-system {
  align-self: flex-start;
  background-color: #ffffff;
  box-shadow: 2px 2px 0 var(--eink-black);
  border-radius: 0px 6px 6px 6px;
}

.chat-bubble.role-user {
  align-self: flex-end;
  background-color: var(--eink-paper-darker);
  box-shadow: -2px 2px 0 var(--eink-black);
  border-radius: 6px 0px 6px 6px;
}

.chat-bubble.role-user.speaking-now {
  border: 2px dashed var(--eink-black);
  background-color: var(--eink-paper);
}

.bubble-speaker {
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  border-bottom: 1.5px dotted var(--eink-black);
  padding-bottom: 2px;
  margin-bottom: 6px;
  color: var(--eink-dark);
  letter-spacing: 0.5px;
}

.bubble-text {
  font-family: Georgia, serif;
  color: var(--eink-black);
}

.bubble-score {
  font-size: 9.5px;
  font-weight: 900;
  align-self: flex-end;
  margin-top: 4px;
  border: 1.5px solid var(--eink-black);
  padding: 0 4px;
  background-color: #ffffff;
  color: var(--eink-black);
}

.dialogue-mic-panel {
  background-color: var(--eink-paper);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  border-top: 1px solid var(--eink-border-gray);
}

.dialogue-mic-waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 26px;
  margin-bottom: 8px;
}

/* Dialogue panel action buttons fine-tuning */
#btnStartDialogue {
  flex: none !important;
  width: 160px;
  height: 36px;
  padding: 0 16px;
  font-size: 12.5px;
  margin: 24px auto 0 auto !important;
  border-radius: 4px;
  box-shadow: 2px 2px 0px var(--eink-black);
}

#btnStartDialogue:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--eink-black);
  background-color: var(--eink-dark);
}

#dialogueRestartBtn,
#dialogueNextQuestionBtn {
  flex: none !important;
  height: 36px;
  padding: 0 20px;
  font-size: 12.5px;
  border-radius: 4px;
  width: auto;
}

/* Dialogue record button styles */
#dialogueRecordBtn.recording {
  background-color: var(--eink-black);
  color: #ffffff;
  animation: record-glow 1.5s infinite ease-in-out;
}

.dialogue-score-feed {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 250px;
  overflow-y: auto;
  padding: 6px;
  border: none;
}

.score-feed-item-wrapper {
  background-color: #ffffff;
  border: 1.5px solid var(--eink-black);
  border-radius: 6px;
  padding: 12px 14px;
  transition: all 0.15s ease;
  cursor: pointer;
  box-shadow: 2px 2px 0px var(--eink-black);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.score-feed-item-wrapper:hover {
  background-color: var(--eink-paper-darker);
}

.score-feed-item-wrapper.selected {
  background-color: var(--eink-paper-darker);
  border: 2px solid var(--eink-black);
  box-shadow: none;
  transform: translate(1px, 1px);
}

.score-feed-text-card {
  font-family: Georgia, serif;
  font-size: 13px;
  line-height: 1.5;
  color: var(--eink-black);
  text-align: left;
}

.score-feed-pill-container {
  display: flex;
  justify-content: center;
  margin-top: 4px;
}

.score-feed-pill {
  background-color: var(--eink-paper);
  border: 1px solid var(--eink-black);
  border-radius: 12px;
  padding: 1px 12px;
  font-size: 10px;
  font-weight: 700;
  color: var(--eink-black);
  display: inline-flex;
  align-items: center;
}

/* Selected sentence details panel */
.selected-sentence-detail-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-color: #ffffff;
  border: 1.5px solid var(--eink-black);
  border-radius: 6px;
  padding: 14px;
  margin-top: 10px;
  box-shadow: 2px 2px 0px var(--eink-black);
}

/* Media Controls Bar */
.detail-media-controls-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--eink-border-gray);
}

.mini-control-btn {
  border: 1.5px solid var(--eink-black);
  border-radius: 50%;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.1s ease, background-color 0.1s ease;
  outline: none;
  box-shadow: 2px 2px 0px var(--eink-black);
}

.mini-control-btn.play-original-btn,
.mini-control-btn.play-user-btn {
  width: 38px;
  height: 38px;
}

.mini-control-btn.record-mic-btn {
  width: 52px;
  height: 52px;
  background-color: var(--eink-black);
  box-shadow: 3px 3px 0px rgba(0,0,0,0.15);
}

.mini-control-btn.record-mic-btn svg {
  fill: #ffffff;
  width: 24px;
  height: 24px;
}

.mini-control-btn svg {
  fill: var(--eink-black);
  width: 18px;
  height: 18px;
}

.mini-control-btn:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

.mini-control-btn.record-mic-btn:active {
  background-color: #333333;
}

/* Scorecard Accordion Container */
.scorecard-accordion-container {
  background-color: var(--eink-paper-darker);
  border: 1.5px solid var(--eink-black);
  border-radius: 6px;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
}

.scorecard-toggle-header {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  color: var(--eink-black);
  cursor: pointer;
  padding: 4px 0;
  user-select: none;
}

.scorecard-toggle-header .toggle-chevron {
  width: 14px;
  height: 14px;
  fill: var(--eink-black);
  transition: transform 0.2s ease;
}

.scorecard-toggle-header.collapsed .toggle-chevron {
  transform: rotate(180deg);
}

.scorecard-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 8px 0;
  border-top: 1px dashed var(--eink-border-gray);
  transition: all 0.2s ease;
}

.scorecard-content.collapsed {
  display: none;
}

/* Dimension layout inside accordion */
.dimension-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dimension-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  padding: 2px 0;
}

.dimension-main .dim-name {
  font-size: 11px;
  font-weight: 800;
  color: var(--eink-black);
  width: 50px;
  flex-shrink: 0;
}

.dimension-main .dim-progress-wrapper {
  flex: 1;
  position: relative;
}

.dimension-main .dim-badge {
  position: absolute;
  right: 6px;
  top: -8px;
  font-size: 7.5px;
  font-weight: 900;
  padding: 0px 4px;
  border-radius: 2px;
  border: 1px solid var(--eink-black);
  background-color: var(--eink-black);
  color: #ffffff;
  z-index: 10;
}

.dimension-main .dim-chevron {
  width: 14px;
  height: 14px;
  fill: var(--eink-gray);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.dimension-main.expanded .dim-chevron {
  transform: rotate(180deg);
}

.dim-details {
  display: flex;
  gap: 16px;
  padding-left: 60px;
  font-size: 9px;
  color: var(--eink-gray);
  font-weight: 700;
}

.dim-details.hidden {
  display: none;
}

/* 迷你媒体按钮组 */
.detail-media-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 6px 0 12px 0;
  border-bottom: 1px dotted var(--eink-border-gray);
  padding-bottom: 12px;
}

.mini-media-btn {
  background-color: #ffffff;
  border: 1.5px solid var(--eink-black);
  border-radius: 14px;
  padding: 2px 10px;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  outline: none;
  transition: all 0.1s ease;
  box-shadow: 1.5px 1.5px 0px var(--eink-black);
  height: 24px;
}

.mini-media-btn:active {
  transform: translate(0.5px, 0.5px);
  box-shadow: 0.5px 0.5px 0px var(--eink-black);
  background-color: var(--eink-bg-gray);
}

.mini-media-btn .svg-icon-xs {
  width: 11px;
  height: 11px;
  fill: var(--eink-black);
}

/* 进度条 */
.detail-dimensions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
  border-bottom: 1px dotted var(--eink-border-gray);
  padding-bottom: 12px;
}

.dimension-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dimension-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
}

.dim-name {
  color: var(--eink-black);
}

.dim-badge {
  font-size: 8px;
  font-weight: 900;
  padding: 0 4px;
  border-radius: 2px;
  border: 1px solid var(--eink-black);
}

.dim-badge.badge-excellent {
  background-color: var(--eink-black);
  color: #ffffff;
}

.dim-badge.badge-good {
  background-color: var(--eink-bg-gray);
  color: var(--eink-black);
}

.dim-badge.badge-fail {
  border-style: dotted;
  color: var(--eink-gray);
}

.eink-progress-track {
  height: 8px;
  border: 1.5px solid var(--eink-black);
  background-color: #ffffff;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.eink-progress-bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background-color: var(--eink-black);
  background-image: linear-gradient(45deg, rgba(255,255,255,0.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.15) 50%, rgba(255,255,255,0.15) 75%, transparent 75%, transparent);
  background-size: 8px 8px;
}

.dim-sub-info {
  display: flex;
  gap: 14px;
  font-size: 9px;
  color: var(--eink-gray);
  font-weight: 700;
  margin-left: 2px;
}

.score-feed-detail .detail-analysis {
  font-size: 11px;
  line-height: 1.5;
  color: var(--eink-dark);
}

/* 对话剧本预览模块样式 (Dialogue preview script) */
.dialogue-preview-section {
  display: flex;
  flex-direction: column;
  margin-top: 14px;
  text-align: left;
  border-top: 1px dotted var(--eink-border-gray);
  padding-top: 10px;
  flex: 1;
  overflow: hidden;
}

.dialogue-preview-header {
  font-size: 11.5px;
  font-weight: 800;
  color: var(--eink-dark);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.dialogue-preview-list {
  background-color: #ffffff;
  border: 1.5px solid var(--eink-black);
  padding: 8px 10px;
  overflow-y: auto;
  max-height: 180px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.dialogue-preview-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.dialogue-preview-item:last-of-type {
  margin-bottom: 0;
}

.preview-role-symbol {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 10px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.preview-role-symbol.role-a {
  background-color: var(--eink-black);
  color: #ffffff;
  border: 1px solid var(--eink-black);
}

.preview-role-symbol.role-b {
  background-color: #ffffff;
  color: var(--eink-black);
  border: 1.5px solid var(--eink-black);
}

.dialogue-preview-item .preview-text {
  font-family: Georgia, serif;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--eink-black);
  word-break: break-word;
}

/* ==========================================================================
   Responsive Layout for Smaller Screens / Viewports
   ========================================================================== */
@media (max-width: 1024px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow-y: auto;
    padding: 20px 10px;
  }

  .workspace {
    flex-direction: column;
    height: auto;
    gap: 30px;
    padding: 10px;
    justify-content: center;
  }

  .device-container {
    flex: none;
    width: 100%;
  }

  .control-sidebar {
    width: 100%;
    max-width: 530px;
    height: auto;
    max-height: none;
    flex-shrink: 0;
  }
}

/* Vocab Report Page Styles */
#pageVocabReport .screen-body {
  background-color: #ffffff !important;
  padding: 14px 16px !important;
}

.report-header-nav {
  background-color: #ffffff !important;
  border-bottom: 1.5px solid var(--eink-black) !important;
  justify-content: center !important;
  position: relative;
}

.report-nav-back-btn {
  position: absolute;
  left: 10px;
  background: none;
  border: none;
  width: 34px;
  height: 34px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.report-nav-back-btn .svg-icon {
  fill: var(--eink-black) !important;
  width: 20px;
  height: 20px;
}

.report-header-title {
  color: var(--eink-black) !important;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.report-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  background-color: #ffffff;
  flex: 1;
}

.report-section-vertical {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.report-section-title-simple {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--eink-black);
  margin-bottom: 10px;
  text-align: left;
}

.donut-chart-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 32px;
  width: 100%;
  padding: 4px 10px;
}

.donut-legend-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.legend-color-box {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex: none;
}

.legend-color-box.bg-black {
  background-color: #111111;
  border: 1px solid #111111;
}

.legend-color-box.bg-light-gray {
  background-color: #888888;
  border: 1px solid #888888;
}

.legend-color-box.bg-striped {
  background: repeating-linear-gradient(
    135deg,
    #111111,
    #111111 1.5px,
    #ffffff 1.5px,
    #ffffff 3.5px
  );
  border: 1px solid var(--eink-black);
}

.legend-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.legend-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--eink-black);
}

.legend-label {
  font-size: 10px;
  color: var(--eink-gray);
  font-weight: 500;
}

.report-hr {
  width: 100%;
  height: 1px;
  border-top: 1px solid var(--eink-bg-gray);
  margin: 2px 0;
}

.radar-chart-row {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.report-footer-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  margin-top: auto;
}