/* ========================================
   Dave Jin Portfolio - Terminal Style
   ======================================== */

/* CSS Variables */
:root {
  --bg-deep: #0a0a0f;
  --bg-terminal: #0d1117;
  --bg-terminal-light: #161b22;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-green: #39d353;
  --accent-green-dim: #238636;
  --accent-blue: #58a6ff;
  --accent-orange: #f0883e;
  --accent-purple: #a371f7;
  --accent-red: #f85149;
  --user-message: #1f6feb;
  --ai-message: #238636;
  --border: #30363d;
  --border-hover: #484f58;
  
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  --font-display: 'Orbitron', sans-serif;
  
  --glow-green: 0 0 10px rgba(57, 211, 83, 0.3);
  --glow-blue: 0 0 10px rgba(88, 166, 255, 0.3);
  --glow-purple: 0 0 10px rgba(163, 113, 247, 0.3);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(57, 211, 83, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(88, 166, 255, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(163, 113, 247, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.1) 0px,
    rgba(0, 0, 0, 0.1) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: 1000;
  opacity: 0.3;
}

/* Container */
.container {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Terminal Window */
.terminal-window {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: 
    0 4px 20px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.05);
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-terminal-light);
  border-bottom: 1px solid var(--border);
}

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

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

.btn-close { background: #ff5f57; }
.btn-minimize { background: #ffbd2e; }
.btn-maximize { background: #28ca42; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.terminal-body {
  padding: 1.5rem;
}

/* Hero Section */
.terminal-header {
  margin-bottom: 2rem;
}

.hero-ascii {
  text-align: center;
  margin-bottom: 1rem;
  overflow-x: auto;
}

.hero-ascii pre {
  font-size: 0.4rem;
  line-height: 1.2;
  color: var(--accent-green);
  text-shadow: var(--glow-green);
}

.hero-text {
  text-align: center;
}

.hero-name {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-green);
  text-shadow: var(--glow-green);
  margin-bottom: 0.5rem;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.cursor {
  animation: blink 1s step-end infinite;
}

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

.status-bar {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Command Line */
.command-line {
  margin: 1.5rem 0 1rem;
  font-family: var(--font-mono);
}

.prompt {
  color: var(--accent-green);
  font-weight: 600;
  margin-right: 0.5rem;
}

.command {
  color: var(--accent-blue);
}

/* Profile Section */
.profile-section {
  margin-bottom: 2rem;
}

.profile-body {
  padding: 1rem 1.5rem 1.5rem;
}

.profile-output {
  margin-bottom: 1.5rem;
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.profile-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.profile-item .label {
  font-size: 0.75rem;
  color: var(--accent-purple);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.profile-item .value {
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* Skills */
.skills-output {
  margin-bottom: 1.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  padding: 0.35rem 0.75rem;
  background: rgba(57, 211, 83, 0.1);
  border: 1px solid var(--accent-green-dim);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--accent-green);
  transition: all 0.2s ease;
}

.skill-tag:hover {
  background: rgba(57, 211, 83, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--glow-green);
}

/* Books */
.books-output {
  margin-bottom: 1rem;
}

.book-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px dashed var(--border);
}

.book-item:last-child {
  border-bottom: none;
}

.book-icon {
  font-size: 1.2rem;
}

.book-title {
  color: var(--accent-blue);
  font-weight: 500;
}

.book-link {
  text-decoration: none;
}

.book-link:hover .book-title {
  color: var(--accent-green);
  text-decoration: underline;
}
  color: var(--accent-blue);
  font-weight: 500;
}

.book-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  display: block;
  margin-top: 0.25rem;
}

/* Chat Section */
.chat-section {
  margin-bottom: 2rem;
}

.chat-window {
  max-height: 600px;
  display: flex;
  flex-direction: column;
}

.chat-titlebar {
  flex-shrink: 0;
}

.chat-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1rem;
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
  margin-bottom: 1rem;
}

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: var(--bg-terminal);
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.message {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.message-content {
  max-width: 80%;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.user-message {
  flex-direction: row-reverse;
}

.user-message .message-content {
  background: var(--user-message);
  color: white;
}

.ai-message .message-content {
  background: var(--bg-terminal-light);
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 0.5rem;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Suggested Questions */
.suggested-questions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.suggest-btn {
  padding: 0.4rem 0.8rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.suggest-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(88, 166, 255, 0.1);
}

/* Chat Input */
.chat-input-area {
  display: flex;
  gap: 0.5rem;
}

#chat-input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease;
}

#chat-input:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 0 2px rgba(57, 211, 83, 0.1);
}

#chat-input::placeholder {
  color: var(--text-muted);
}

#send-btn {
  padding: 0.75rem 1.25rem;
  background: var(--accent-green);
  border: none;
  border-radius: 8px;
  color: var(--bg-deep);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

#send-btn:hover {
  background: #4ae65e;
  transform: translateY(-2px);
  box-shadow: var(--glow-green);
}

/* Content Section */
.content-section {
  margin-bottom: 2rem;
}

.section-header {
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--text-primary);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.content-card {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: all 0.3s ease;
}

.content-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-4px);
  box-shadow: 
    0 8px 30px rgba(0, 0, 0, 0.3),
    0 0 20px rgba(57, 211, 83, 0.1);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.card-badge {
  padding: 0.2rem 0.5rem;
  background: rgba(88, 166, 255, 0.15);
  border: 1px solid var(--accent-blue);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--accent-blue);
  font-weight: 500;
}

.card-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-green);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.card-link:hover {
  gap: 0.75rem;
  text-shadow: var(--glow-green);
}

/* Contact Section */
.contact-section {
  margin-bottom: 2rem;
}

.contact-body {
  padding: 1.5rem;
}

.contact-intro {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 0 2px rgba(57, 211, 83, 0.1);
}

.form-group select {
  cursor: pointer;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.submit-btn {
  padding: 0.875rem 1.5rem;
  background: var(--accent-green);
  border: none;
  border-radius: 6px;
  color: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.submit-btn:hover {
  background: #4ae65e;
  transform: translateY(-2px);
  box-shadow: var(--glow-green);
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px dashed var(--border);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.social-link:hover {
  color: var(--accent-green);
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-command {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-ascii pre {
    font-size: 0.25rem;
  }
  
  .hero-name {
    font-size: 1.75rem;
  }
  
  .hero-tagline {
    font-size: 0.85rem;
  }
  
  .status-bar {
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
  }
  
  .profile-grid {
    grid-template-columns: 1fr;
  }
  
  .message-content {
    max-width: 90%;
  }
  
  .content-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 1rem 0.75rem;
  }
  
  .terminal-body {
    padding: 1rem;
  }
}

/* CRT Flicker Effect (subtle) */
@keyframes flicker {
  0% { opacity: 0.97; }
  5% { opacity: 0.95; }
  10% { opacity: 0.99; }
  15% { opacity: 0.96; }
  20% { opacity: 0.98; }
  100% { opacity: 0.98; }
}

.terminal-window {
  animation: flicker 4s infinite;
}

/* Selection */
::selection {
  background: var(--accent-green);
  color: var(--bg-deep);
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.lang-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.lang-link:hover {
  color: var(--text-primary);
  border-color: var(--accent-green);
}

.lang-link.active {
  background: var(--accent-green-dim);
  color: var(--text-primary);
  border-color: var(--accent-green);
}
:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}