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

body {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

.terminal {
  width: 100%;
  max-width: 900px;
  height: 85vh;
  background: #1e1e1e;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.terminal-header {
  background: linear-gradient(180deg, #3d3d3d 0%, #323232 100%);
  padding: 10px 15px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid #2a2a2a;
}

.terminal-buttons {
  display: flex;
  gap: 8px;
}

.terminal-buttons span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.btn-close { background: #ff5f56; }
.btn-minimize { background: #ffbd2e; }
.btn-maximize { background: #27ca3f; }

.terminal-title {
  flex: 1;
  text-align: center;
  color: #999;
  font-size: 13px;
}

/* Terminal Tabs */
.terminal-tabs {
  flex: 1;
  display: flex;
  gap: 2px;
  margin-left: 15px;
}

.terminal-tabs .tab {
  background: #2a2a2a;
  border: none;
  color: #888;
  padding: 6px 16px;
  font-size: 12px;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  cursor: pointer;
  border-radius: 6px 6px 0 0;
  transition: all 0.2s;
}

.terminal-tabs .tab:hover {
  background: #3a3a3a;
  color: #ccc;
}

.terminal-tabs .tab.active {
  background: #1e1e1e;
  color: #4ec9b0;
}

/* Tab Content */
.tab-content {
  display: none;
}

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

.terminal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  scroll-behavior: smooth;
}

.terminal-footer {
  background: #2a2a2a;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #666;
  font-size: 12px;
  border-top: 1px solid #3a3a3a;
}

.progress {
  color: #4ec9b0;
}

.instruction {
  color: #888;
}

/* Welcome Screen */
.welcome-message {
  text-align: center;
  padding: 40px 20px;
}

.ascii-art {
  color: #4ec9b0;
  font-size: 8px;
  line-height: 1.2;
  margin-bottom: 30px;
  overflow-x: auto;
}

@media (min-width: 600px) {
  .ascii-art {
    font-size: 10px;
  }
}

.intro {
  color: #fff;
  font-size: 24px;
  margin-bottom: 10px;
}

.subtitle {
  color: #888;
  font-size: 14px;
  margin-bottom: 5px;
}

.hint {
  color: #4ec9b0;
  font-size: 14px;
  margin-top: 30px;
  animation: pulse 2s infinite;
}

.hint.dim {
  color: #666;
  animation: none;
  margin-top: 10px;
  font-size: 12px;
}

.hint.dim a {
  color: #ce9178;
  text-decoration: none;
}

.hint.dim a:hover {
  text-decoration: underline;
}

/* Preface section on welcome screen */
.preface {
  text-align: left;
  max-width: 500px;
  margin: 25px auto;
  padding: 20px;
  background: rgba(78, 201, 176, 0.1);
  border-left: 3px solid #4ec9b0;
  border-radius: 0 8px 8px 0;
}

.preface-title {
  color: #4ec9b0;
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 10px;
}

.preface-content {
  color: #d4d4d4;
  font-size: 14px;
  margin-bottom: 10px;
}

.preface-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.preface-list li {
  color: #aaa;
  font-size: 13px;
  line-height: 1.8;
  padding-left: 5px;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Conversation */
#conversation {
  display: none;
}

#conversation.active {
  display: block;
}

.message {
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
}

.message.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Section Header - Base */
.section-header {
  color: #fff;
  font-size: 20px;
  font-weight: bold;
  margin: 40px 0 20px 0;
  padding: 15px 20px;
  border-radius: 0 8px 8px 0;
}

.section-header::before {
  content: '▶ ';
}

/* Timestamp sections (e.g., "11:01 - ...") - Blue */
.section-header.timestamp {
  background: linear-gradient(90deg, #1e4a6d 0%, transparent 100%);
  border-left: 4px solid #5c9fd4;
}

.section-header.timestamp::before {
  color: #5c9fd4;
}

/* Other sections (前言, 附錄, etc.) - Purple/Magenta */
.section-header.other {
  background: linear-gradient(90deg, #4a3560 0%, transparent 100%);
  border-left: 4px solid #c678dd;
}

.section-header.other::before {
  color: #c678dd;
}

/* Speaker Labels - Console Style (inline with content) */
.speaker {
  display: none;
}

/* Message Content */
.content {
  color: #d4d4d4;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.content::before {
  font-weight: bold;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

.speaker.me + .content::before {
  content: 'jimmy@devops:~$ ';
  color: #4ec9b0;
}

.speaker.wife + .content::before {
  content: 'claude> ';
  color: #ce9178;
}

.content code {
  background: #2d2d2d;
  color: #9cdcfe;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
}

/* Code Block */
.code-block {
  background: #2d2d2d;
  border-left: 3px solid #4ec9b0;
  padding: 15px;
  margin: 10px 0 10px 20px;
  overflow-x: auto;
  font-size: 13px;
  color: #9cdcfe;
  border-radius: 0 5px 5px 0;
}

/* Tip Box */
.tip-box {
  background: rgba(78, 201, 176, 0.1);
  border-left: 3px solid #4ec9b0;
  padding: 15px;
  margin: 15px 0;
  border-radius: 0 5px 5px 0;
}

.tip-box .tip-title {
  color: #4ec9b0;
  font-weight: bold;
  margin-bottom: 8px;
}

.tip-box .tip-content {
  color: #aaa;
  font-size: 13px;
  line-height: 1.5;
}

/* Narration */
.narration {
  color: #6a9955;
  font-style: italic;
  padding-left: 20px;
  line-height: 1.8;
  white-space: pre-wrap;
}

/* Table */
.table-container {
  overflow-x: auto;
  margin: 10px 0 10px 20px;
}

.data-table {
  border-collapse: collapse;
  font-size: 13px;
  width: 100%;
}

.data-table th {
  background: #2d2d2d;
  color: #4ec9b0;
  padding: 10px;
  text-align: left;
  border: 1px solid #3a3a3a;
}

.data-table td {
  padding: 10px;
  border: 1px solid #3a3a3a;
  color: #d4d4d4;
}

/* Typing cursor */
.typing-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: #4ec9b0;
  animation: blink 1s infinite;
  vertical-align: middle;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Scrollbar */
.terminal-body::-webkit-scrollbar {
  width: 8px;
}

.terminal-body::-webkit-scrollbar-track {
  background: #1e1e1e;
}

.terminal-body::-webkit-scrollbar-thumb {
  background: #3a3a3a;
  border-radius: 4px;
}

.terminal-body::-webkit-scrollbar-thumb:hover {
  background: #4a4a4a;
}

/* Markdown Content (for tab pages) */
.markdown-content {
  color: #d4d4d4;
  line-height: 1.8;
  padding: 20px 0;
}

.markdown-content h1 {
  color: #4ec9b0;
  font-size: 28px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid #4ec9b0;
}

.markdown-content h2 {
  color: #c678dd;
  font-size: 20px;
  margin-top: 30px;
  margin-bottom: 15px;
}

.markdown-content h3 {
  color: #e5c07b;
  font-size: 16px;
  margin-top: 25px;
  margin-bottom: 10px;
}

.markdown-content p {
  margin-bottom: 15px;
}

.markdown-content blockquote {
  border-left: 3px solid #ce9178;
  padding-left: 15px;
  margin: 20px 0;
  color: #ce9178;
  font-style: italic;
}

.markdown-content pre {
  background: #2d2d2d;
  border-left: 3px solid #4ec9b0;
  padding: 15px;
  margin: 15px 0;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.4;
  border-radius: 0 5px 5px 0;
}

.markdown-content code {
  background: #2d2d2d;
  color: #9cdcfe;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
}

.markdown-content pre code {
  background: none;
  padding: 0;
}

.markdown-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 15px 0;
  font-size: 13px;
}

.markdown-content th {
  background: #2d2d2d;
  color: #4ec9b0;
  padding: 10px;
  text-align: left;
  border: 1px solid #3a3a3a;
}

.markdown-content td {
  padding: 10px;
  border: 1px solid #3a3a3a;
  color: #d4d4d4;
}

.markdown-content ul, .markdown-content ol {
  margin: 15px 0;
  padding-left: 25px;
}

.markdown-content li {
  margin-bottom: 8px;
}

.markdown-content a {
  color: #4ec9b0;
  text-decoration: none;
}

.markdown-content a:hover {
  text-decoration: underline;
}

.markdown-content hr {
  border: none;
  border-top: 1px solid #3a3a3a;
  margin: 30px 0;
}

/* Mermaid diagrams */
.mermaid-container {
  background: #2d2d2d;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
}

.mermaid-container svg {
  max-width: 100%;
  height: auto;
}

.markdown-content strong {
  color: #e5c07b;
}

.markdown-content em {
  color: #98c379;
}

/* Love Letter */
.love-letter {
  background: rgba(206, 145, 120, 0.1);
  border: 1px solid #ce9178;
  border-radius: 5px;
  padding: 20px;
  margin: 20px 0;
  color: #d4d4d4;
  line-height: 1.8;
}

/* Love Letter in tab - match markdown-content h1 style */
#letter-content .love-letter h1 {
  color: #4ec9b0;
  font-size: 28px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid #4ec9b0;
}

.love-letter p {
  margin-bottom: 15px;
}

.love-letter .signature {
  text-align: right;
  color: #ce9178;
  font-style: italic;
}

/* End Screen */
.end-screen {
  text-align: center;
  padding: 40px 20px;
  color: #888;
}

.end-screen h2 {
  color: #4ec9b0;
  margin-bottom: 20px;
}

.end-screen .stats {
  margin: 20px 0;
  line-height: 2;
}

.end-screen .restart-hint {
  margin-top: 30px;
  color: #666;
  font-size: 12px;
}

/* Letter Page */
.letter-page {
  padding: 20px 0;
}

.back-link {
  margin-bottom: 30px;
}

.back-link a {
  color: #4ec9b0;
  text-decoration: none;
  font-size: 14px;
}

.back-link a:hover {
  text-decoration: underline;
}

.letter-page .love-letter {
  background: rgba(206, 145, 120, 0.1);
  border: 1px solid #ce9178;
  border-radius: 5px;
  padding: 30px;
  margin: 0;
  color: #d4d4d4;
  line-height: 1.8;
}

.letter-page .love-letter h1 {
  color: #ce9178;
  font-size: 24px;
  margin-bottom: 30px;
  text-align: center;
}

.letter-page .love-letter p {
  margin-bottom: 20px;
}

.letter-page .love-letter hr {
  border: none;
  border-top: 1px solid #ce9178;
  margin: 30px 0;
}

.letter-page .love-letter em {
  color: #888;
}

.letter-date {
  color: #ce9178;
}

.terminal-footer a {
  color: #4ec9b0;
  text-decoration: none;
}

.terminal-footer a:hover {
  text-decoration: underline;
}

/* Jump button */
.jump-btn {
  background: #2d2d2d;
  border: 1px solid #4ec9b0;
  color: #4ec9b0;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  cursor: pointer;
  transition: all 0.2s;
}

.jump-btn:hover {
  background: #4ec9b0;
  color: #1e1e1e;
}

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