/* Portfolio Professional Minimal Theme - Electronics/VLSI/Linux Enthusiast */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #0a0d12;
  --bg-alt: #0f1318;
  --fg: #e4e4e7;
  --fg-muted: #71717a;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.15);
  --highlight: #facc15;
  --section-bg: #12161d;
  --border: #1e2530;
  --link: #22d3ee;
  --link-hover: #facc15;
  --mono: 'JetBrains Mono', 'Fira Mono', 'Consolas', monospace;
  --transition: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Subtle circuit grid background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 0 20px;
  position: relative;
}

header {
  text-align: center;
  margin-bottom: 56px;
  padding: 40px 0;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeSlideIn 0.8s var(--transition) forwards;
}

.profile-photo-container {
  width: 150px;
  height: 150px;
  margin: 0 auto 24px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent);
  background: var(--section-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 
    0 0 0 4px var(--bg),
    0 0 30px var(--accent-dim),
    0 20px 40px rgba(0,0,0,0.4);
  transition: transform 0.4s var(--transition), box-shadow 0.4s var(--transition);
}
.profile-photo-container:hover {
  transform: scale(1.05);
  box-shadow: 
    0 0 0 4px var(--bg),
    0 0 50px var(--accent-dim),
    0 25px 50px rgba(0,0,0,0.5);
}
.profile-photo-container::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px dashed var(--accent);
  opacity: 0.4;
  animation: rotate 20s linear infinite;
}
.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(10%);
  transition: filter 0.4s var(--transition);
}
.profile-photo-container:hover .profile-photo {
  filter: grayscale(0%);
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeSlideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1 {
  font-size: 2.5em;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.subtitle {
  color: var(--accent);
  font-size: 1.05em;
  margin-bottom: 20px;
  min-height: 1.5em;
}
.subtitle .cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.contact-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.95em;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all 0.3s var(--transition);
  position: relative;
  overflow: hidden;
}
.contact-links a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateY(100%);
  transition: transform 0.3s var(--transition);
  z-index: -1;
}
.contact-links a:hover {
  color: var(--bg);
  border-color: var(--accent);
}
.contact-links a:hover::before {
  transform: translateY(0);
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  padding: 16px 0;
  margin: -48px -20px 40px -20px;
  padding-left: 20px;
  padding-right: 20px;
  border-bottom: 1px solid var(--border);
}
.nav-links {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9em;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all 0.25s var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all 0.25s var(--transition);
  transform: translateX(-50%);
}
.nav-links a:hover {
  color: var(--accent);
}
.nav-links a:hover::after {
  width: 60%;
}
.nav-links a.active {
  color: var(--accent);
}
.nav-links a.active::after {
  width: 60%;
}

section {
  background: var(--section-bg);
  border-radius: 12px;
  margin-bottom: 40px;
  padding: 32px 28px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s var(--transition), transform 0.6s var(--transition), border-color 0.3s;
}
section.visible {
  opacity: 1;
  transform: translateY(0);
}
section:hover {
  border-color: var(--accent-dim);
}
section:last-child {
  margin-bottom: 0;
}

h2 {
  color: var(--accent);
  font-size: 1.15em;
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
}
h2::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.skill-category {
  padding: 20px;
  background: var(--bg-alt);
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: transform 0.3s var(--transition), border-color 0.3s;
}
.skill-category:hover {
  transform: translateY(-4px);
  border-color: var(--accent-dim);
}
.skill-category h3 {
  color: var(--highlight);
  font-size: 0.95em;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.skill-category ul {
  list-style: none;
  padding-left: 0;
}
.skill-category li {
  padding: 4px 0 4px 16px;
  position: relative;
  color: var(--fg-muted);
  font-size: 0.9em;
  transition: color 0.2s, transform 0.2s;
}
.skill-category li:hover {
  color: var(--fg);
  transform: translateX(4px);
}
.skill-category li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.project-card {
  background: var(--bg-alt);
  border-left: 3px solid var(--accent);
  padding: 20px 20px 20px 24px;
  margin-bottom: 16px;
  border-radius: 0 8px 8px 0;
  transition: all 0.3s var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}
.project-card:hover {
  background: rgba(34, 211, 238, 0.05);
  transform: translateX(8px);
  border-left-color: var(--highlight);
}
.project-card:hover::before {
  background: var(--highlight);
  box-shadow: 0 0 20px rgba(250, 204, 21, 0.3);
}
.project-card h3 {
  color: var(--fg);
  font-size: 1.05em;
  margin-bottom: 6px;
  font-weight: 600;
}
.project-tech {
  color: var(--accent);
  font-size: 0.85em;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}
.project-card p {
  color: var(--fg-muted);
  font-size: 0.9em;
  line-height: 1.6;
}

.education-item {
  margin-bottom: 20px;
  padding: 16px 16px 16px 20px;
  border-left: 3px solid var(--accent);
  background: var(--bg-alt);
  border-radius: 0 8px 8px 0;
  transition: transform 0.3s var(--transition);
}
.education-item:hover {
  transform: translateX(6px);
}
.education-item h3 {
  color: var(--fg);
  font-size: 0.95em;
  margin-bottom: 6px;
  font-weight: 600;
}
.education-details {
  display: flex;
  justify-content: space-between;
  font-size: 0.85em;
  color: var(--fg-muted);
  margin-bottom: 4px;
}
.education-item > div:last-child {
  color: var(--highlight);
  font-size: 0.9em;
  font-weight: 500;
}

footer {
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.85em;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}
footer div:first-child {
  margin-bottom: 6px;
}

/* Status indicator */
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid var(--accent-dim);
  border-radius: 20px;
  font-size: 0.85em;
  color: var(--accent);
  margin-top: 16px;
}
.status::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

@media (max-width: 600px) {
  .container { padding: 16px 12px 0 12px; }
  nav { margin: -16px -12px 32px -12px; padding: 12px; }
  section { padding: 20px 16px; }
  .skills-grid { grid-template-columns: 1fr; }
  .profile-photo-container { width: 120px; height: 120px; }
  h1 { font-size: 1.8em; }
  .nav-links { gap: 4px; }
  .nav-links a { padding: 6px 10px; font-size: 0.8em; }
}