:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --accent-color: #0066cc;
  --border-color: #cccccc;
  --secondary-color: #666666;
  --muted-bg: rgba(0, 0, 0, 0.03);
  --overlay-bg: rgba(255, 255, 255, 0.9);
  --logo-bg: var(--bg-color);
}

[data-theme="dark"] {
  --bg-color: #000000;
  --text-color: #f5f5f5;
  --accent-color: #00ccff;
  --border-color: #333333;
  --secondary-color: #888888;
  --overlay-bg: rgba(0, 0, 0, 0.8);
  --logo-bg: rgba(255, 255, 255, 0.479);
}

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

body {
  font-family: "Courier New", "Monaco", "Menlo", monospace;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  padding: 20px;
  padding-top: 110px; /* space for fixed buttons */
  max-width: 800px;
  margin: 0 auto;
  transition: all 0.3s ease;
}

h1,
h2,
h3 {
  margin: 20px 0 10px 0;
  font-weight: bold;
}

html {
  background-color: var(--bg-color);
  transition: background-color 0.3s ease;
}

h1 {
  font-size: 2em;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 10px;
  position: relative;
}

h1::before {
  content: "<!DOCTYPE html>";
  position: absolute;
  top: -25px;
  left: 0;
  font-size: 0.4em;
  color: var(--secondary-color);
}

h2 {
  font-size: 1.4em;
  color: var(--accent-color);
}

h2::before {
  content: "<";
  color: var(--secondary-color);
}

h2::after {
  content: ">";
  color: var(--secondary-color);
}

p {
  margin: 10px 0;
}

ul {
  margin: 10px 0;
  padding-left: 20px;
}

li {
  margin: 5px 0;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-color);
}

a:hover {
  background-color: var(--accent-color);
  color: var(--bg-color);
  padding: 2px;
}

.topbar {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 8px 0 12px 0;
  background: linear-gradient(to bottom, var(--bg-color) 70%, transparent);
  z-index: 2;
}

.theme-toggle,
.lang-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--overlay-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 14px;
  font-family: inherit;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  border-radius: 3px;
  z-index: 3;
  backdrop-filter: blur(4px);
}

.lang-toggle {
  right: 150px;
}

.theme-toggle:hover,
.lang-toggle:hover {
  background: var(--accent-color);
  color: var(--bg-color);
}

.top-icons {
  position: fixed;
  top: 20px;
  left: 20px;
  display: flex;
  gap: 10px;
  z-index: 3;
}

.icon-link {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background: var(--overlay-bg);
  color: var(--text-color);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  backdrop-filter: blur(4px);
}
.icon-link:hover {
  background: var(--accent-color);
  color: var(--bg-color);
}
.icon-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header spacing tweaks */
header p {
  margin: 6px 0 0;
  line-height: 1.35;
}
header {
  margin-bottom: 8px;
}

.contact-info {
  background: var(--border-color);
  padding: 15px;
  margin: 20px 0;
  border-left: 4px solid var(--accent-color);
}

.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.skill-category {
  border: 1px solid var(--border-color);
  padding: 15px;
  background: rgba(0, 102, 204, 0.05);
}

.highlight {
  background: var(--accent-color);
  color: var(--bg-color);
  padding: 2px 4px;
}

.typing {
  display: inline-block;
  white-space: nowrap;
  border-right: 2px solid var(--accent-color);
  animation: caret 1s steps(1) infinite;
  overflow: hidden;
  max-width: 100%;
}

@keyframes caret {
  0%,
  50% {
    border-right-color: var(--accent-color);
  }
  51%,
  100% {
    border-right-color: transparent;
  }
}

.matrix-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.05;
}

.footer {
  margin-top: 50px;
  text-align: center;
  font-size: 0.8em;
  color: var(--secondary-color);
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

/* Projects */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

.project {
  border: 1px solid var(--border-color);
  padding: 12px 12px 10px;
  background: var(--muted-bg);
}
.project h3 {
  margin: 0;
  font-size: 1.05em;
}
.project-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
}
.project-logo {
  max-height: 44px;
  max-width: 130px;
  object-fit: contain;
  flex-shrink: 0;
  padding: 4px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--logo-bg);
}
.project p {
  margin: 6px 0 8px;
  font-size: 0.95em;
}
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.badge {
  border: 1px dashed var(--border-color);
  padding: 2px 6px;
  font-size: 0.8em;
  color: var(--secondary-color);
}

/* Stats */
.stats {
  display: flex;
  gap: 20px;
  margin: 12px 0 8px;
  flex-wrap: wrap;
}
.stat {
  border: 1px solid var(--border-color);
  padding: 10px 12px;
  background: var(--muted-bg);
}
.stat strong {
  font-size: 1.1em;
}

/* CTA */
.cta {
  margin: 16px 0 0;
  display: inline-block;
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
  padding: 8px 12px;
  text-decoration: none;
}
.cta:hover {
  background: var(--accent-color);
  color: var(--bg-color);
}

@media (max-width: 600px) {
  body {
    padding: 10px;
    padding-top: 90px; /* avoid overlap with fixed controls */
  }
  .skills {
    grid-template-columns: 1fr;
  }
  .lang-toggle {
    right: 110px;
  }
}
