/* ============================================================
   SHWETHAN KUMAR ANUMALLA – PORTFOLIO
   Theme: Terminal / Hacker Phosphor Green
   ============================================================ */

:root {
  --bg: #090e09;
  --bg-alt: #0c130c;
  --card: #0f1a0f;
  --card-hover: #132013;
  --border: #1a2e1a;
  --border-glow: #00ff8855;
  --green: #00ff88;
  --green-mid: #00cc66;
  --green-dim: #00995044;
  --green-dark: #004d2e;
  --green-text: #00ff88cc;
  --white: #f0f5f0;
  --gray: #7a9080;
  --gray-light: #a8bfb0;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'Space Grotesk', sans-serif;
  --nav-h: 64px;
  --radius: 8px;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--green-dark); border-radius: 3px; }

/* ============================================================
   UTILITIES
   ============================================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.accent { color: var(--green); }

.section {
  padding: 100px 0;
}
.section-alt {
  background: var(--bg-alt);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 60px;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  letter-spacing: 2px;
}
.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
  max-width: 400px;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(9, 14, 9, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
}
.navbar.scrolled { border-bottom-color: var(--green-dark); }

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.05em;
}
.logo-bracket { color: var(--gray); }

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gray-light);
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--green);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--green); }
.nav-link:hover::after { width: 100%; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--green);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

#particleCanvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,255,136,0.015) 2px,
    rgba(0,255,136,0.015) 4px
  );
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  padding-top: var(--nav-h);
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  opacity: 0.8;
}
.hero-tag::before { content: '> '; }

.hero-name {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.name-accent {
  color: var(--green);
  text-shadow: 0 0 40px rgba(0,255,136,0.35);
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--gray-light);
  margin-bottom: 20px;
  min-height: 2rem;
}
.role-prefix { color: var(--green); }
.typed-text { color: var(--green); }
.cursor-blink {
  color: var(--green);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-bio {
  font-size: 1rem;
  color: var(--gray-light);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  padding: 12px 28px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--green);
  color: var(--bg);
  font-weight: 700;
}
.btn-primary:hover {
  background: transparent;
  color: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 20px rgba(0,255,136,0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--green);
  border-color: var(--green-dark);
}
.btn-ghost:hover {
  border-color: var(--green);
  box-shadow: 0 0 20px rgba(0,255,136,0.15);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}
.stat {
  padding: 8px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat:first-child { padding-left: 0; }
.stat-val {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  color: var(--gray);
  letter-spacing: 0.06em;
  margin-top: 4px;
  white-space: nowrap;
}
.stat-div {
  width: 1px;
  height: 36px;
  background: var(--border);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
  letter-spacing: 0.15em;
  animation: float 2.5s ease-in-out infinite;
  z-index: 2;
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   FADE-IN SCROLL ANIMATIONS
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  color: var(--gray-light);
  margin-bottom: 16px;
  font-size: 0.97rem;
  line-height: 1.75;
}
.about-text p strong { color: var(--white); }
.about-location {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--green);
  margin-top: 24px;
}
.accent-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 4px var(--green); }
  50% { box-shadow: 0 0 14px var(--green); }
}

.edu-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.edu-list { display: flex; flex-direction: column; gap: 2px; }
.edu-item {
  display: flex;
  gap: 20px;
  padding: 14px 16px;
  border-left: 2px solid var(--border);
  transition: border-color var(--transition);
}
.edu-item:hover { border-left-color: var(--green); }
.edu-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
  min-width: 80px;
  padding-top: 2px;
}
.edu-degree {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
}
.edu-school {
  font-size: 0.8rem;
  color: var(--gray-light);
  margin-top: 2px;
}
.edu-score {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  margin-top: 4px;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  margin-bottom: 56px;
}
.skill-category {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.skill-category:hover {
  border-color: var(--green-dark);
  box-shadow: 0 0 20px rgba(0,255,136,0.07);
}
.skill-cat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--green);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--gray-light);
  transition: all var(--transition);
  cursor: default;
}
.skill-tag:hover {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 10px rgba(0,255,136,0.2);
}

.skill-bars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.skill-bar-item {}
.skill-bar-header {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gray-light);
  margin-bottom: 8px;
}
.skill-pct { color: var(--green); }
.skill-bar-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(to right, var(--green-dark), var(--green));
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 8px rgba(0,255,136,0.4);
}

/* ============================================================
   EXPERIENCE TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--green), var(--border));
}
.timeline-item {
  position: relative;
  margin-bottom: 24px;
}
.timeline-dot {
  position: absolute;
  left: -34px;
  top: 20px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px rgba(0,255,136,0.6);
}
.timeline-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.timeline-card:hover {
  border-color: var(--green-dark);
  box-shadow: 0 0 24px rgba(0,255,136,0.08);
  transform: translateX(4px);
}
.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.tl-role {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--white);
}
.tl-company {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  margin-top: 4px;
}
.tl-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}
.tl-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
}
.tl-location {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--green-dark);
  color: var(--green);
  letter-spacing: 0.06em;
}
.tl-bullets {
  padding-left: 16px;
  list-style: none;
}
.tl-bullets li {
  position: relative;
  font-size: 0.85rem;
  color: var(--gray-light);
  padding-left: 14px;
  margin-bottom: 6px;
}
.tl-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.7rem;
  top: 2px;
}
.tl-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.tl-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 9px;
  border-radius: 3px;
  background: var(--green-dim);
  border: 1px solid var(--green-dark);
  color: var(--green-text);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: all var(--transition);
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--green-dark), var(--green));
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover {
  border-color: var(--green-dark);
  box-shadow: 0 8px 40px rgba(0,255,136,0.1);
  transform: translateY(-4px);
}
.project-card:hover::before { opacity: 1; }

.project-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--border);
  position: absolute;
  top: 16px; right: 20px;
  line-height: 1;
  transition: color var(--transition);
}
.project-card:hover .project-number { color: var(--green-dark); }

.project-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.project-icon { font-size: 1.4rem; }
.project-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.3;
}
.project-desc {
  font-size: 0.85rem;
  color: var(--gray-light);
  line-height: 1.7;
  margin-bottom: 18px;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 20px; }
.proj-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--green-dim);
  border: 1px solid var(--green-dark);
  color: var(--green-text);
}
.project-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  transition: gap var(--transition), letter-spacing var(--transition);
  letter-spacing: 0;
}
.project-link:hover { letter-spacing: 0.05em; }

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.cert-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}
.cert-filter {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding: 7px 16px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--gray-light);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.06em;
}
.cert-filter:hover, .cert-filter.active {
  border-color: var(--green);
  color: var(--green);
  background: rgba(0,255,136,0.06);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all var(--transition);
}
.cert-card:hover {
  border-color: var(--green-dark);
  box-shadow: 0 0 16px rgba(0,255,136,0.07);
  transform: translateY(-2px);
}
.cert-card.hidden { display: none; }
.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--green);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.cert-name {
  font-size: 0.82rem;
  color: var(--white);
  line-height: 1.4;
}
.cert-date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--gray);
  margin-top: 6px;
}

/* ============================================================
   ACHIEVEMENTS
   ============================================================ */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.ach-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all var(--transition);
}
.ach-card:hover {
  border-color: var(--green-dark);
  box-shadow: 0 0 20px rgba(0,255,136,0.08);
  transform: translateY(-2px);
}
.ach-icon { font-size: 1.5rem; flex-shrink: 0; }
.ach-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 4px;
}
.ach-sub {
  font-size: 0.8rem;
  color: var(--gray-light);
  line-height: 1.5;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact-intro {
  font-size: 1rem;
  color: var(--gray-light);
  line-height: 1.7;
  margin-bottom: 36px;
}
.contact-items { display: flex; flex-direction: column; gap: 16px; margin-bottom: 32px; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.9rem;
  color: var(--gray-light);
  transition: color var(--transition);
}
.contact-item:hover { color: var(--green); }
.contact-icon {
  font-size: 1rem;
  color: var(--green);
  width: 24px;
  text-align: center;
}
.social-links { display: flex; gap: 14px; }
.social-link {
  width: 40px; height: 40px;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-light);
  transition: all var(--transition);
}
.social-link:hover {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 14px rgba(0,255,136,0.2);
}

/* Terminal box */
.terminal-box {
  background: #080d08;
  border: 1px solid var(--green-dark);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,255,136,0.08);
}
.terminal-header {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  background: #0c120c;
  border-bottom: 1px solid var(--border);
}
.t-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.t-dot.red { background: #ff5f57; }
.t-dot.yellow { background: #febc2e; }
.t-dot.green { background: #28c840; }
.t-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
  margin-left: 8px;
}
.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
}
.t-line { color: var(--gray-light); }
.t-prompt { color: var(--green); margin-right: 10px; }
.t-output { color: var(--gray); padding-left: 20px; }
.t-green { color: var(--green); }
.cursor-blink-sm {
  color: var(--green);
  animation: blink 1s step-end infinite;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--green);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
}
.footer-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
  transition: color var(--transition);
}
.footer-link:hover { color: var(--green); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(9,14,9,0.97);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    backdrop-filter: blur(12px);
  }
  .nav-links.open { transform: translateY(0); }
  .hamburger { display: flex; }
  .nav-link { font-size: 0.9rem; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }

  .hero-stats {
    gap: 4px;
    justify-content: flex-start;
  }
  .stat { padding: 8px 12px; }
  .stat:first-child { padding-left: 0; }
  .stat-val { font-size: 1.2rem; }

  .section { padding: 70px 0; }
  .section-header { margin-bottom: 40px; }

  .tl-header { flex-direction: column; }
  .tl-meta { align-items: flex-start; }

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

@media (max-width: 480px) {
  .hero-name { font-size: 2rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .stat-div { display: none; }
  .hero-stats { gap: 20px; justify-content: flex-start; }
}