@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ==================== MODERN DESIGN (DEFAULT) ==================== */
body.modern {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #fafafa;
  color: #1a1a2e;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Diary Container */
.modern .diary-container {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 12px 40px rgba(0,0,0,0.06);
  margin: 20px 0;
}

/* Diary Navigation */
.modern .diary-nav {
  margin-bottom: 30px;
}

.modern .diary-nav a {
  color: #4f46e5;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.modern .diary-nav a:hover {
  color: #6366f1;
  text-decoration: underline;
}

/* Diary Entry */
.modern .diary-entry header {
  margin-bottom: 30px;
}

.modern .diary-entry h1 {
  font-size: 2.2em;
  font-weight: 700;
  color: #1a1a2e;
  margin: 0 0 10px 0;
  letter-spacing: -0.02em;
  border: none;
  padding: 0;
}

.modern .diary-entry time {
  color: #666;
  font-size: 0.9em;
}

.modern .diary-entry .meta {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.modern .diary-entry .category {
  color: #4f46e5;
  font-size: 0.8em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.modern .diary-entry .reading-time {
  color: #888;
  font-size: 0.85em;
}

/* Content Sections */
.modern .diary-entry .content {
  margin-top: 20px;
}

.modern .diary-entry .content p {
  margin: 16px 0;
}

.modern .diary-entry .content h2 {
  color: #1a1a2e;
  font-size: 1.5em;
  font-weight: 700;
  margin: 40px 0 16px 0;
  letter-spacing: -0.01em;
}

.modern .diary-entry .content h3 {
  color: #1a1a2e;
  font-size: 1.2em;
  font-weight: 600;
  margin: 30px 0 12px 0;
}

.modern .diary-entry .content h4 {
  color: #1a1a2e;
  font-size: 1.05em;
  font-weight: 600;
  margin: 24px 0 10px 0;
}

.modern .diary-entry .content .intro {
  font-size: 1.1em;
  color: #444;
  margin-bottom: 24px;
}

/* Blockquotes */
.modern .diary-entry blockquote {
  border-left: 4px solid #4f46e5;
  padding: 16px 20px;
  margin: 24px 0;
  background: #f8f9fa;
  border-radius: 0 8px 8px 0;
  color: #555;
  font-style: italic;
}

.modern .diary-entry blockquote p {
  margin: 0;
}

/* Lists */
.modern .diary-entry ul,
.modern .diary-entry ol {
  padding-left: 24px;
  margin: 16px 0;
}

.modern .diary-entry li {
  margin: 8px 0;
  line-height: 1.6;
}

/* Code */
.modern .diary-entry code {
  background: #f1f3f4;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  color: #1a1a2e;
}

.modern .diary-entry pre {
  background: #1a1a2e;
  color: #e2e8f0;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
}

.modern .diary-entry pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Cards */
.modern .diary-entry .card {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
  border: 1px solid #eee;
}

.modern .diary-entry .card p:first-child {
  margin-top: 0;
}

.modern .diary-entry .card p:last-child {
  margin-bottom: 0;
}

/* Highlights */
.modern .diary-entry .highlight {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(79, 70, 229, 0.05));
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
  border-left: 4px solid #4f46e5;
}

/* Tables */
.modern .diary-entry table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.modern .diary-entry th,
.modern .diary-entry td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid #eee;
}

.modern .diary-entry th {
  font-weight: 600;
  color: #1a1a2e;
  background: #f8f9fa;
}

.modern .diary-entry td {
  color: #444;
}

/* Warnings */
.modern .diary-entry .warning {
  background: rgba(238, 90, 90, 0.1);
  border-left: 4px solid #ee5a5a;
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 0 8px 8px 0;
}

.modern .diary-entry .warning h3,
.modern .diary-entry .warning h4 {
  color: #dc2626;
  margin-top: 0;
}

/* Signature/Footer */
.modern .diary-entry footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #eee;
}

.modern .diary-entry .signature {
  color: #888;
  font-style: italic;
  text-align: center;
  margin-bottom: 20px;
}

/* Mode Toggle */
.modern .mode-toggle {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 20px;
}

.modern .mode-toggle button {
  background: #1a1a2e;
  color: white;
  border: none;
  padding: 8px 16px;
  font-size: 0.85em;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
}

.modern .mode-toggle button:hover {
  background: #2d2d44;
  transform: scale(1.02);
}

/* ==================== NERD DESIGN (TERMINAL STYLE) ==================== */
body.nerd {
  font-family: 'JetBrains Mono', 'Share Tech Mono', monospace;
  background: #0a0a0f;
  color: #00ff41;
  padding: 20px;
  max-width: 900px;
  margin: 0 auto;
  background-image: radial-gradient(ellipse at top, #0d1a1a 0%, #0a0a0f 100%);
  font-size: 16px;
}

.nerd a { color: #00ffff; text-decoration: none; }
.nerd a:hover { text-shadow: 0 0 10px #00ffff; }

/* Diary Container */
.nerd .diary-container {
  background: rgba(0, 255, 65, 0.03);
  border: 1px solid #00ff41;
  border-radius: 4px;
  padding: 30px;
  margin: 20px 0;
}

/* Diary Navigation */
.nerd .diary-nav {
  margin-bottom: 20px;
}

.nerd .diary-nav a {
  color: #00ffff;
}

.nerd .diary-nav a:hover {
  text-shadow: 0 0 10px #00ffff;
}

/* Diary Entry */
.nerd .diary-entry header {
  margin-bottom: 30px;
  border-bottom: 1px solid #00ff41;
  padding-bottom: 20px;
}

.nerd .diary-entry h1 {
  color: #00ff41;
  font-size: 1.8em;
  margin: 0 0 10px 0;
  text-shadow: 0 0 10px #00ff41;
  border: none;
}

.nerd .diary-entry h1:before {
  content: "> ";
  color: #ff00ff;
}

.nerd .diary-entry time {
  color: #888;
  font-size: 0.9em;
}

.nerd .diary-entry .meta {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.nerd .diary-entry .category {
  color: #ff00ff;
  font-size: 0.85em;
}

.nerd .diary-entry .reading-time {
  color: #888;
  font-size: 0.85em;
}

/* Content Sections */
.nerd .diary-entry .content {
  margin-top: 20px;
}

.nerd .diary-entry .content p {
  margin: 16px 0;
  line-height: 1.7;
}

.nerd .diary-entry .content h2 {
  color: #ff00ff;
  font-size: 1.4em;
  margin: 40px 0 16px 0;
}

.nerd .diary-entry .content h2:before {
  content: "## ";
  color: #ff00ff;
}

.nerd .diary-entry .content h3 {
  color: #00ffff;
  font-size: 1.2em;
  margin: 30px 0 12px 0;
}

.nerd .diary-entry .content h3:before {
  content: "### ";
  color: #00ffff;
}

.nerd .diary-entry .content h4 {
  color: #ffff00;
  font-size: 1.05em;
  margin: 24px 0 10px 0;
}

.nerd .diary-entry .content .intro {
  font-size: 1.05em;
  color: #00ff41;
  margin-bottom: 24px;
}

/* Blockquotes */
.nerd .diary-entry blockquote {
  border-left: 3px solid #ff00ff;
  padding: 16px 20px;
  margin: 24px 0;
  background: rgba(255, 0, 255, 0.05);
  color: #aaa;
  font-style: italic;
}

.nerd .diary-entry blockquote p {
  margin: 0;
}

/* Lists */
.nerd .diary-entry ul,
.nerd .diary-entry ol {
  padding-left: 24px;
  margin: 16px 0;
}

.nerd .diary-entry li {
  margin: 8px 0;
  line-height: 1.6;
}

.nerd .diary-entry li::marker {
  color: #00ffff;
}

/* Code */
.nerd .diary-entry code {
  background: rgba(0, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  color: #00ffff;
}

.nerd .diary-entry pre {
  background: #0d0d14;
  border: 1px solid #00ff41;
  color: #00ff41;
  padding: 16px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 16px 0;
}

.nerd .diary-entry pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Cards */
.nerd .diary-entry .card {
  background: rgba(0, 255, 65, 0.05);
  border: 1px solid #00ff41;
  border-radius: 4px;
  padding: 20px;
  margin: 20px 0;
}

.nerd .diary-entry .card p:first-child {
  margin-top: 0;
}

.nerd .diary-entry .card p:last-child {
  margin-bottom: 0;
}

/* Highlights */
.nerd .diary-entry .highlight {
  background: rgba(255, 0, 255, 0.1);
  border-left: 3px solid #ff00ff;
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 4px;
}

/* Tables */
.nerd .diary-entry table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.nerd .diary-entry th,
.nerd .diary-entry td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid #00ff41;
}

.nerd .diary-entry th {
  color: #ff00ff;
  background: rgba(255, 0, 255, 0.1);
}

.nerd .diary-entry td {
  color: #00ff41;
}

/* Warnings */
.nerd .diary-entry .warning {
  background: rgba(255, 68, 68, 0.1);
  border-left: 3px solid #ff4444;
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 4px;
}

.nerd .diary-entry .warning h3,
.nerd .diary-entry .warning h4 {
  color: #ff4444;
  margin-top: 0;
}

/* Signature/Footer */
.nerd .diary-entry footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #00ff41;
}

.nerd .diary-entry .signature {
  color: #888;
  font-style: italic;
  text-align: center;
  margin-bottom: 20px;
}

/* Mode Toggle */
.nerd .mode-toggle {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 20px;
}

.nerd .mode-toggle button {
  background: transparent;
  color: #00ff41;
  border: 1px solid #00ff41;
  padding: 8px 16px;
  font-size: 0.85em;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
}

.nerd .mode-toggle button:hover {
  background: #00ff41;
  color: #0a0a0f;
}

/* Scanline effect for nerd mode */
.nerd .scanline {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,0) 50%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.1));
  background-size: 100% 4px;
  pointer-events: none;
  z-index: 999;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 600px) {
  body { padding: 10px; }
  
  body.modern .diary-container,
  body.nerd .diary-container { padding: 20px; }
  
  body.modern .diary-entry h1 { font-size: 1.8em; }
  body.nerd .diary-entry h1 { font-size: 1.5em; }
  
  body.modern .diary-entry h2 { font-size: 1.3em; }
  body.nerd .diary-entry h2 { font-size: 1.2em; }
  
  .modern .diary-entry .meta,
  .nerd .diary-entry .meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .modern .diary-entry .content { font-size: 0.95em; }
  .nerd .diary-entry .content { font-size: 0.9em; }
  
  .modern .mode-toggle { margin-bottom: 16px; }
  .nerd .mode-toggle { margin-bottom: 16px; }
}

@media (max-width: 400px) {
  body { padding: 8px; }
  
  body.modern .diary-container,
  body.nerd .diary-container { padding: 16px; }
  
  body.modern .diary-entry h1 { font-size: 1.5em; }
  body.nerd .diary-entry h1 { font-size: 1.3em; }
  
  .modern .diary-entry .content { font-size: 0.9em; }
  .nerd .diary-entry .content { font-size: 0.85em; }
}
.modern .diary-entry .cta-card {
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-left: 4px solid #4f46e5;
  border-radius: 10px;
  padding: 20px;
  margin: 28px 0;
}
.modern .diary-entry .cta-card h3 {
  margin-top: 0;
  color: #3730a3;
}
.nerd .diary-entry .cta-card {
  background: rgba(0, 255, 255, 0.08);
  border: 1px solid #00ffff;
  border-left: 3px solid #ff00ff;
  padding: 18px;
  margin: 28px 0;
}
.nerd .diary-entry .cta-card h3 {
  margin-top: 0;
}