:root {
  --bg-color: #0b0f19;
  --panel-bg: #151c2c;
  --panel-border: rgb(255 255 255 / 8%);
  --primary-text: #fff;
  --secondary-text: #a0aec0;
  --accent-color: #00d2ff;
  --accent-glow: rgb(0 210 255 / 40%);
}

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

body {
  font-family: 'Segoe UI', Roboto, Helvetica, sans-serif;
  line-height: 1.6;
  background-color: var(--bg-color);
  color: var(--primary-text);
  background-image: 
    radial-gradient(circle at 15% 50%, rgb(0 210 255 / 5%), transparent 25%),
    radial-gradient(circle at 85% 30%, rgb(0 210 255 / 3%), transparent 25%);
}

a {
  text-decoration: none;
  color: inherit;
}
ul { list-style-position: inside; }

/* Layout & Containers */
.layout-wrapper {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: grid;
  gap: 30px;
  grid-template-columns: 350px 1fr;
}

@media (width <= 900px) {
  .layout-wrapper { grid-template-columns: 1fr; }
}

.sidebar, .main-content {
  display: grid;
  gap: 25px;
  align-content: start;
}

.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 30px;
}

/* Sidebar Profiles */
.profile-card { text-align: center; }

/* 2. The 3D Avatar Flip */
.avatar-wrapper {
  width: 150px;
  height: 150px;
  perspective: 1000px;
  margin: 0 auto 20px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.avatar-wrapper:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 50%;
  border: 3px solid var(--accent-color);
  box-shadow: 0 0 20px var(--accent-glow);
}

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.flip-card-back {
  transform: rotateY(180deg);
  background: var(--panel-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  color: var(--accent-color);
}

.profile-name {
  font-size: 2rem;
  font-weight: 700;
}
.profile-title {
  color: var(--accent-color);
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.contact-links {
  display: grid;
  gap: 12px;
  text-align: left;
  margin-top: 20px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--secondary-text);
  transition: color 0.2s;
}

.contact-item:hover {
  color: var(--accent-color);
}

.contact-item svg {
  width: 20px;
  fill: var(--accent-color);
}

/* Typography */
.section-title {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
  margin-bottom: 20px;
}

.intro-text, .timeline-details, .cert-issuer {
  color: var(--secondary-text);
}

.intro-text {
  text-align: justify;
  font-size: 1.05rem;
}

/* Timeline Items (Experience/Edu/Awards) */
.timeline-item {
  position: relative;
  padding-left: 25px;
  margin-bottom: 25px;
  border-left: 2px solid var(--panel-border);
  transition: border-color 0.3s;
}

.timeline-item:hover {
  border-left-color: var(--accent-color);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-date {
  color: var(--accent-color);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
}

.timeline-title {
  font-size: 1.2rem;
}

.timeline-subtitle {
  font-size: 1rem;
  color: var(--secondary-text);
  margin-bottom: 8px;
}

/* Skills & Certs */
.skill-category h4, .cert-title {
  margin-bottom: 5px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 15px;
}

.skill-tag {
  background: rgb(0 210 255 / 10%);
  border: 1px solid rgb(0 210 255 / 20%);
  color: var(--accent-color);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
  transition: 0.2s;
}

.skill-tag:hover {
  background: var(--accent-color);
  color: #000;
}

.cert-item {
  margin-bottom: 15px;
}

.language-item {
  display: flex;
  justify-content: space-between;
}

.cert-title {
  font-size: 0.95rem;
  font-weight: 600;
}

.cert-issuer {
  font-size: 0.85rem;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: 0.4s ease-out;
  will-change: opacity, transform;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Hacker Terminal Overlay --- */
.terminal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgb(11 15 25 / 95%);
  backdrop-filter: blur(5px);
  color: #0f0;
  font-family: 'Courier New', Courier, monospace;
  z-index: 9999;
  padding: 40px;
  box-sizing: border-box;
  opacity: 1;
  transition: opacity 0.5s ease;
  pointer-events: auto;
}

.terminal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.terminal-content {
  font-size: 1.2rem;
  line-height: 1.6;
}

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

@keyframes blink {
  50% { opacity: 0; }
}