/* ============================================================
   style.css — Portfolio: Rajwinder Singh Mankoo
   Dark cybersecurity / hacker aesthetic
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:         #0a0e17;
  --bg-alt:     #0f1421;
  --bg-card:    #131929;
  --accent:     #00ff88;
  --accent2:    #00c8ff;
  --text:       #c9d1e0;
  --text-dim:   #6b7a99;
  --border:     #1e2d45;
  --font-mono:  'Courier New', Courier, monospace;
  --font-sans:  'Segoe UI', system-ui, sans-serif;
  --radius:     6px;
  --transition: 0.25s ease;
  --max-w:      1100px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent2);
}

img {
  max-width: 100%;
}

/* ── Utility ──────────────────────────────────────────────── */
.container {
  width: 90%;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section {
  padding: 90px 0;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.section-title::before {
  content: '// ';
  color: var(--text-dim);
}

.section-subtitle {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 50px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #0a0e17;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--accent2);
  border-color: var(--accent2);
}

.btn-outline:hover {
  background: var(--accent2);
  color: #0a0e17;
}

/* ── Navbar ───────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 18px 0;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: padding var(--transition);
}

#navbar.scrolled {
  padding: 12px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-logo span {
  color: var(--accent2);
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font-mono);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a:hover::after {
  color: var(--accent);
  width: 100%;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ─────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

/* Animated grid background */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 136, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 4px 12px;
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.hero-name {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 14px;
}

.hero-name .accent {
  color: var(--accent);
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: var(--accent2);
  margin-bottom: 20px;
  min-height: 1.8em;
}

/* Typewriter cursor */
.cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent2);
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.hero-intro {
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 36px;
  font-size: 1.05rem;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Floating glow orb */
.hero-orb {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,255,136,0.07) 0%, transparent 70%);
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(-50%) scale(1); }
  50%       { transform: translateY(-52%) scale(1.05); }
}

/* ── About ────────────────────────────────────────────────── */
#about {
  background: var(--bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  color: var(--text-dim);
  margin-bottom: 16px;
}

.about-text p strong {
  color: var(--text);
}

.about-interests {
  margin-top: 20px;
}

.about-interests h4 {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--accent2);
  background: var(--bg-card);
  transition: border-color var(--transition);
}

.tag:hover {
  border-color: var(--accent2);
}

/* Terminal widget */
.terminal {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-bar {
  background: #1c2333;
  padding: 10px 16px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red   { background: #ff5f57; }
.dot.yellow{ background: #febc2e; }
.dot.green { background: #28c840; }

.terminal-body {
  padding: 20px;
  line-height: 1.9;
}

.terminal-body .prompt { color: var(--accent); }
.terminal-body .cmd    { color: #fff; }
.terminal-body .output { color: var(--text-dim); padding-left: 14px; }
.terminal-body .hl     { color: var(--accent2); }

/* ── Skills ───────────────────────────────────────────────── */
#skills {
  background: var(--bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.skill-card-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.skill-card h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.skill-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-list li {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: 3px 10px;
  border-radius: 3px;
  background: var(--bg-alt);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* ── Projects ─────────────────────────────────────────────── */
#projects {
  background: var(--bg-alt);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}

.project-card:hover {
  border-color: var(--accent2);
  transform: translateY(-4px);
}

.project-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.project-icon {
  font-size: 1.3rem;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  flex: 1;
  margin-bottom: 18px;
}

.exp-meta {
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 10px;
  font-family: var(--font-mono);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 3px;
  background: rgba(0, 200, 255, 0.08);
  color: var(--accent2);
  border: 1px solid rgba(0, 200, 255, 0.2);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-top: auto;
  transition: gap var(--transition);
}

.project-link:hover {
  gap: 10px;
  color: var(--accent);
}

/* ── Writeups ─────────────────────────────────────────────── */
#writeups {
  background: var(--bg);
}

.writeups-placeholder {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 60px 40px;
  text-align: center;
}

.writeups-placeholder .ph-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.writeups-placeholder h3 {
  font-family: var(--font-mono);
  color: var(--text);
  margin-bottom: 10px;
}

.writeups-placeholder p {
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto 24px;
  font-size: 0.95rem;
}

/* ── Certifications ───────────────────────────────────────── */
#certs {
  background: var(--bg-alt);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 22px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: border-color var(--transition), transform var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.cert-badge {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.cert-info h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 4px;
}

.cert-info .cert-detail {
  font-size: 0.8rem;
  color: var(--accent);
  font-family: var(--font-mono);
}

.cert-info .cert-org {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* ── Contact ──────────────────────────────────────────────── */
#contact {
  background: var(--bg);
}

.contact-text h3 {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 12px;
}

.contact-text p {
  color: var(--text-dim);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.contact-link .icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: border-color var(--transition);
}

.contact-link:hover .icon {
  border-color: var(--accent);
}

/* ── Footer ───────────────────────────────────────────────── */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 30px 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

footer p span {
  color: var(--accent);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

/* Active nav link */
.nav-links a.active {
  color: var(--accent);
}
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 23, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li a {
    display: block;
    padding: 12px 24px;
  }

  .nav-toggle {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-orb {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 60px 0;
  }

  .hero-btns {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}