/* ========== IMPORTS ========== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ========== CSS VARIABLES ========== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #161622;
  --bg-card-hover: #1c1c2e;
  --border-color: #1e1e32;
  --text-primary: #e4e4ef;
  --text-secondary: #8888a8;
  --text-muted: #55556a;
  --accent-cyan: #00f0ff;
  --accent-green: #00ff88;
  --accent-purple: #a855f7;
  --accent-red: #ff3366;
  --accent-yellow: #ffd700;
  --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.3);
  --glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Inter', sans-serif;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-cyan); border-radius: 4px; }

/* ========== PARTICLE CANVAS ========== */
#particles-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}

/* ========== NAVBAR ========== */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  padding: 16px 40px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled { border-bottom-color: var(--border-color); }
.nav-logo {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.2rem;
  color: var(--accent-cyan);
}
.nav-logo span { color: var(--text-muted); }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
  transition: var(--transition); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--accent-cyan);
  transition: var(--transition);
}
.nav-links a:hover { color: var(--accent-cyan); }
.nav-links a:hover::after { width: 100%; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.mobile-toggle span { width: 24px; height: 2px; background: var(--text-primary); transition: var(--transition); }

/* ========== SECTIONS ========== */
section { position: relative; z-index: 1; padding: 100px 40px; max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-label {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-cyan);
  text-transform: uppercase; letter-spacing: 3px; margin-bottom: 12px;
}
.section-title { font-size: 2.4rem; font-weight: 700; margin-bottom: 16px; }
.section-subtitle { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ========== HERO ========== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding-top: 80px;
}
.hero-content { max-width: 800px; }
.hero-greeting {
  font-family: var(--font-mono); font-size: 1rem; color: var(--accent-green);
  margin-bottom: 16px; opacity: 0; animation: fadeInUp 0.6s 0.2s forwards;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700;
  margin-bottom: 8px; opacity: 0; animation: fadeInUp 0.6s 0.4s forwards;
}
.hero-name .highlight {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-role {
  font-family: var(--font-mono); font-size: 1.3rem; color: var(--text-secondary);
  margin-bottom: 24px; height: 2rem;
  opacity: 0; animation: fadeInUp 0.6s 0.6s forwards;
}
.hero-role .cursor {
  display: inline-block; width: 2px; height: 1.3rem;
  background: var(--accent-cyan); margin-left: 2px;
  animation: blink 1s step-end infinite;
}
.hero-summary {
  color: var(--text-secondary); font-size: 1.05rem; max-width: 600px;
  margin: 0 auto 36px; opacity: 0; animation: fadeInUp 0.6s 0.8s forwards;
}
.hero-buttons {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  opacity: 0; animation: fadeInUp 0.6s 1s forwards;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px; font-weight: 600;
  font-size: 0.95rem; cursor: pointer; transition: var(--transition);
  border: none; font-family: var(--font-sans);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  color: var(--bg-primary);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow-cyan); }
.btn-outline {
  background: transparent; color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}
.btn-outline:hover { background: rgba(0, 240, 255, 0.1); transform: translateY(-2px); }
.hero-stats {
  display: flex; justify-content: center; gap: 48px; margin-top: 60px;
  opacity: 0; animation: fadeInUp 0.6s 1.2s forwards;
}
.stat-item { text-align: center; }
.stat-number {
  font-family: var(--font-mono); font-size: 2rem; font-weight: 700;
  color: var(--accent-cyan);
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ========== ABOUT ========== */
.about-grid { display: flex; justify-content: center; }
.about-text { max-width: 700px; text-align: center; }
.about-image-wrapper { position: relative; }
.about-image {
  width: 320px; height: 320px; border-radius: var(--radius);
  border: 2px solid var(--accent-cyan); overflow: hidden;
  box-shadow: var(--glow-cyan); margin: 0 auto;
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-image .placeholder-text { font-family: var(--font-mono); color: var(--text-muted); font-size: 0.85rem; text-align: center; padding: 20px; }
.about-text p { color: var(--text-secondary); margin-bottom: 20px; }
.about-focus { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }
.focus-card {
  flex: 1; min-width: 140px; padding: 20px; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: var(--radius);
  text-align: center; transition: var(--transition);
}
.focus-card:hover { border-color: var(--accent-cyan); transform: translateY(-4px); box-shadow: var(--glow-cyan); }
.focus-card .icon { font-size: 1.8rem; margin-bottom: 8px; }
.focus-card .label { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-cyan); }

/* ========== CTF WRITEUPS ========== */
.writeups-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.writeup-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 28px; transition: var(--transition);
  position: relative; overflow: hidden;
}
.writeup-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
  opacity: 0; transition: var(--transition);
}
.writeup-card:hover { border-color: var(--accent-cyan); transform: translateY(-4px); box-shadow: var(--glow-cyan); }
.writeup-card:hover::before { opacity: 1; }
.writeup-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.writeup-tag {
  font-family: var(--font-mono); font-size: 0.75rem; padding: 4px 10px;
  border-radius: 4px; font-weight: 600;
}
.tag-web { background: rgba(0, 240, 255, 0.15); color: var(--accent-cyan); }
.tag-network { background: rgba(0, 255, 136, 0.15); color: var(--accent-green); }
.tag-forensics { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.tag-crypto { background: rgba(255, 215, 0, 0.15); color: var(--accent-yellow); }
.tag-misc { background: rgba(255, 51, 102, 0.15); color: var(--accent-red); }
.writeup-difficulty {
  font-family: var(--font-mono); font-size: 0.7rem; padding: 3px 8px;
  border-radius: 4px; border: 1px solid;
}
.diff-easy { border-color: var(--accent-green); color: var(--accent-green); }
.diff-medium { border-color: var(--accent-yellow); color: var(--accent-yellow); }
.diff-hard { border-color: var(--accent-red); color: var(--accent-red); }
.writeup-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.writeup-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
.writeup-link {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-cyan);
  display: inline-flex; align-items: center; gap: 6px; transition: var(--transition);
}
.writeup-link:hover { gap: 10px; }
.writeup-link.coming-soon,
.coming-soon-link {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-muted);
  display: inline-flex; align-items: center; gap: 6px; cursor: default;
  font-style: italic;
}

/* ========== CERTS TIMELINE ========== */
.timeline { position: relative; max-width: 700px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 20px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-green));
}
.timeline-item {
  position: relative; padding-left: 60px; margin-bottom: 48px;
  opacity: 0; transform: translateX(-20px);
}
.timeline-item.visible { opacity: 1; transform: translateX(0); transition: all 0.6s ease; }
.timeline-dot {
  position: absolute; left: 12px; top: 8px; width: 18px; height: 18px;
  border-radius: 50%; border: 3px solid var(--accent-cyan);
  background: var(--bg-primary); box-shadow: var(--glow-cyan); z-index: 2;
}
.timeline-dot.completed { background: var(--accent-cyan); }
.timeline-dot.in-progress { background: var(--accent-yellow); border-color: var(--accent-yellow); animation: pulse 2s infinite; }
.timeline-content {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 24px; transition: var(--transition);
}
.timeline-content:hover { border-color: var(--accent-cyan); box-shadow: var(--glow-cyan); }
.timeline-date {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-green);
  margin-bottom: 8px;
}
.timeline-content h3 { font-size: 1.1rem; margin-bottom: 8px; }
.timeline-content p { color: var(--text-secondary); font-size: 0.9rem; }
.timeline-badge {
  display: inline-block; margin-top: 12px; padding: 4px 12px;
  font-family: var(--font-mono); font-size: 0.75rem; border-radius: 4px;
  background: rgba(0, 240, 255, 0.1); color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

/* ========== PROJECTS ========== */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.project-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 28px; transition: var(--transition);
  display: flex; flex-direction: column;
}
.project-card:hover { border-color: var(--accent-cyan); transform: translateY(-4px); box-shadow: var(--glow-cyan); }
.project-icon { font-size: 2rem; margin-bottom: 16px; }
.project-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.project-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; flex: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.project-tags span {
  font-family: var(--font-mono); font-size: 0.75rem; padding: 4px 10px;
  background: rgba(0, 240, 255, 0.08); color: var(--accent-cyan);
  border-radius: 4px; border: 1px solid rgba(0, 240, 255, 0.2);
}
.project-links { display: flex; gap: 16px; }
.project-links a {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary);
  display: flex; align-items: center; gap: 6px; transition: var(--transition);
}
.project-links a:hover { color: var(--accent-cyan); }

/* ========== SKILLS ========== */
.skills-categories { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.skill-category {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 28px; transition: var(--transition);
}
.skill-category:hover { border-color: var(--accent-cyan); }
.skill-category h3 {
  font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent-cyan);
  margin-bottom: 20px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}
.skill-list { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px; background: rgba(0, 240, 255, 0.05);
  border: 1px solid rgba(0, 240, 255, 0.15); border-radius: 8px;
  font-size: 0.85rem; transition: var(--transition);
}
.skill-item:hover {
  background: rgba(0, 240, 255, 0.1); border-color: var(--accent-cyan);
  transform: translateY(-2px); box-shadow: var(--glow-cyan);
}
.skill-item .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-cyan);
}

/* ========== EDUCATION ========== */
.education-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.education-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 28px; transition: var(--transition);
}
.education-card:hover { border-color: var(--accent-cyan); box-shadow: var(--glow-cyan); }
.education-card .year {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-green);
  margin-bottom: 12px;
}
.education-card h3 { font-size: 1.1rem; margin-bottom: 4px; }
.education-card .school { color: var(--accent-cyan); font-size: 0.95rem; margin-bottom: 8px; }
.education-card .details { color: var(--text-secondary); font-size: 0.9rem; }
.cgpa-badge {
  display: inline-block; margin-top: 12px; padding: 6px 14px;
  background: rgba(0, 255, 136, 0.1); color: var(--accent-green);
  border: 1px solid rgba(0, 255, 136, 0.3); border-radius: 6px;
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600;
}

/* ========== CONTACT ========== */
.contact-wrapper { max-width: 700px; margin: 0 auto; }
.contact-terminal {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); overflow: hidden;
}
.terminal-header {
  display: flex; align-items: center; gap: 8px; padding: 12px 16px;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
}
.terminal-dot { width: 12px; height: 12px; border-radius: 50%; }
.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #28c840; }
.terminal-title {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted);
  margin-left: 8px;
}
.terminal-body { padding: 28px; }
.terminal-line {
  font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-secondary);
  margin-bottom: 16px;
}
.terminal-line .prompt { color: var(--accent-green); }
.terminal-line .cmd { color: var(--accent-cyan); }
.contact-form { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.form-group { position: relative; }
.form-group label {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-cyan);
  display: block; margin-bottom: 6px;
}
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px; background: var(--bg-primary);
  border: 1px solid var(--border-color); border-radius: 8px;
  color: var(--text-primary); font-family: var(--font-mono); font-size: 0.9rem;
  transition: var(--transition); resize: vertical;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent-cyan); box-shadow: var(--glow-cyan);
}
.contact-links {
  display: flex; justify-content: center; gap: 24px; margin-top: 40px;
}
.contact-link {
  display: flex; align-items: center; gap: 8px; padding: 10px 20px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 8px; font-size: 0.9rem; color: var(--text-secondary);
  transition: var(--transition);
}
.contact-link:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); transform: translateY(-2px); }

/* ========== FOOTER ========== */
.footer {
  text-align: center; padding: 40px; border-top: 1px solid var(--border-color);
  position: relative; z-index: 1;
}
.footer p { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); }
.footer .heart { color: var(--accent-red); }

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(255, 215, 0, 0.4); } 50% { box-shadow: 0 0 0 8px rgba(255, 215, 0, 0); } }

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  section { padding: 60px 20px; }
  .navbar { padding: 14px 20px; }
  .nav-links { 
    display: none; position: fixed; top: 60px; left: 0; right: 0;
    background: rgba(10, 10, 15, 0.95); flex-direction: column; align-items: center;
    padding: 32px 0; gap: 24px; backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active { display: flex; }
  .mobile-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-focus { justify-content: center; }
  .hero-stats { gap: 24px; }
  .hero-name { font-size: 2.2rem; }
  .writeups-grid, .projects-grid, .education-cards { grid-template-columns: 1fr; }
  .skills-categories { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; align-items: center; }
  .section-title { font-size: 1.8rem; }
}