/* Font smoothing */
* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -o-font-smoothing: antialiased;
  box-sizing: border-box;
}

/* Reset */
body {
  margin: 0;
  padding: 0;
  font-family: 'JetBrains Mono', monospace;
  background: #e8e4d9;
  transition: background 0.5s ease;
}

/* Theme transition overlay */
.theme-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
}

.theme-transition::before {
  content: '';
  position: absolute;
  top: var(--y, 20px);
  left: var(--x, calc(100% - 80px));
  width: 0;
  height: 0;
  background: #252525;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: none;
}

body.dark-mode .theme-transition::before {
  background: #e8e4d9;
}

.theme-transition.animating::before {
  animation: theme-wipe 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes theme-wipe {
  0% {
    width: 0;
    height: 0;
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  100% {
    width: 300vmax;
    height: 300vmax;
    opacity: 0;
  }
}

/* Code styling */
code,
kbd,
samp,
pre {
  font-family: 'JetBrains Mono', monospace !important;
}

code {
  font-size: 0.875em;
  padding: 0.125rem 0.375rem;
  background-color: #d9d5ca;
  border-radius: 0;
  color: #1a1a1a;
}

pre {
  padding: 1rem;
  background-color: #d9d5ca;
  border-radius: 0;
  overflow-x: auto;
  margin: 1rem 0;
  border-left: 3px solid #1a1a1a;
}

pre code {
  background-color: transparent;
  padding: 0;
  color: #1a1a1a;
  font-size: 0.875rem;
  line-height: 1.5;
}

kbd {
  font-size: 0.875em;
  padding: 0.125rem 0.375rem;
  background-color: #1a1a1a;
  color: #e8e4d9;
  border-radius: 0;
  border: 1px solid #1a1a1a;
}

/* Engineering Manual Styles */
.engineering-manual {
  background: #f5f3eb;
  color: #1a1a1a;
  padding: 60px 80px 60px 120px;
  max-width: 900px;
  margin: 40px auto;
  font-family: 'JetBrains Mono', monospace;
  position: relative;
  border: 1px solid #ccc;
  box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
  transition: background 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

.engineering-manual * {
  transition: color 0.5s ease, background 0.5s ease, border-color 0.5s ease;
}

/* Hole punches */
.engineering-manual::before {
  content: '';
  position: absolute;
  left: 35px;
  top: 0;
  bottom: 0;
  width: 2px;
  border-left: 2px dashed #999;
}

.engineering-manual::after {
  content: '○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-lr;
  font-size: 18px;
  color: #999;
  letter-spacing: 25px;
  line-height: 1;
}

/* ASCII Logo */
.engineering-manual .ascii-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.2;
  color: #0843BF;
  background: transparent;
  border: none;
  padding: 0;
  margin: 0 0 20px 0;
  white-space: pre;
}

/* Dot decoration */
.dot-decoration {
  height: 20px;
  margin-bottom: 30px;
  background-image: radial-gradient(circle, #999 1px, transparent 1px);
  background-size: 8px 8px;
  background-position: 0 0;
  mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,0.6) 30%, rgba(0,0,0,0.3) 60%, rgba(0,0,0,0) 100%);
  -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,0.6) 30%, rgba(0,0,0,0.3) 60%, rgba(0,0,0,0) 100%);
}

.engineering-manual h1 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 40px 0;
  text-transform: uppercase;
  color: #1a1a1a;
}

.engineering-manual h2 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  color: #1a1a1a;
  padding-bottom: 8px;
  border-bottom: 3px double #1a1a1a;
  position: relative;
}

.engineering-manual h2::after {
  content: '○ ○ ○ ○ ○ ○';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 8px;
  color: #999;
  letter-spacing: 4px;
}

.engineering-manual h3 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 700;
  color: #0843BF;
  margin-top: 30px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.engineering-manual h3::before {
  content: "[";
  margin-right: 4px;
}

.engineering-manual h3::after {
  content: "]";
  margin-left: 4px;
}

.engineering-manual p,
.engineering-manual li {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 16px;
  color: #1a1a1a;
  font-weight: 400;
}

.engineering-manual hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 40px 0;
}

.engineering-manual code {
  font-family: 'JetBrains Mono', monospace;
  background: #e8e4d9;
  border: 1px solid #ccc;
  padding: 2px 6px;
  border-radius: 0;
  font-size: 12px;
  color: #1a1a1a;
}

.engineering-manual strong {
  font-family: 'JetBrains Mono', monospace;
  color: #1a1a1a;
  font-weight: 700;
}

.engineering-manual a {
  color: #0843BF;
  text-decoration: none;
  border-bottom: 1px solid #0843BF;
  transition: opacity 0.2s;
  font-family: 'JetBrains Mono', monospace;
}

.engineering-manual a:hover {
  opacity: 0.7;
}

/* Button styling */
.engineering-manual .cta-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.engineering-manual .cta-buttons a {
  display: inline-block;
  padding: 12px 24px;
  background-color: transparent;
  border: 2px solid #0843BF;
  color: #0843BF;
  text-decoration: none;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.1em;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  transition: all 0.2s;
}

.engineering-manual .cta-buttons a:hover {
  background-color: #0843BF;
  color: #f5f3eb;
  opacity: 1;
}

/* Footer text */
.engineering-manual .footer-text {
  font-size: 11px;
  color: #666;
  margin-top: 50px;
  font-weight: 400;
  text-align: center;
  font-style: italic;
}

.engineering-manual .footer-text strong {
  font-style: normal;
  color: #1a1a1a;
}