/* =============================================
   CHINNI NOVAHU — Portfolio Stylesheet
   Dark theme with neon cyan accent
   Font: Syne (display) + DM Mono (code/labels)
   ============================================= */

/* ---- CSS Variables ---- */
:root {
  --bg:        #080c10;
  --bg2:       #0d1117;
  --bg3:       #111820;
  --border:    rgba(0,240,200,0.12);
  --accent:    #00f0c8;
  --accent2:   #00c8a8;
  --accent-dim:rgba(0,240,200,0.08);
  --text:      #e8edf2;
  --text-muted:#7a8a96;
  --text-dim:  #3d4d5a;
  --white:     #ffffff;
  --radius:    12px;
  --radius-sm: 8px;
  --font-main: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow:    0 4px 40px rgba(0,240,200,0.08);
  --shadow-lg: 0 8px 60px rgba(0,240,200,0.15);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  overflow-x: hidden;
  cursor: default;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font-main); cursor: pointer; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ---- Selection ---- */
::selection { background: var(--accent); color: var(--bg); }

/* =============================================
   LOADER
   ============================================= */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-inner { text-align: center; }
.loader-text {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -2px;
  margin-bottom: 1.5rem;
  font-family: var(--font-main);
}
.loader-bar {
  width: 180px;
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto;
}
.loader-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  animation: loaderFill 1.4s ease forwards;
}
@keyframes loaderFill {
  0%   { width: 0%; }
  60%  { width: 80%; }
  100% { width: 100%; }
}

/* =============================================
   NAVBAR
   ============================================= */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 3rem;
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(8,12,16,0.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--white);
}
.nav-logo .dot { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   HERO
   ============================================= */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.8;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: 0 3rem;
  padding-top: 6rem;
}
.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  margin-bottom: 1rem;
}
.hero-name {
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -3px;
  overflow: hidden;
}
.hero-name .line {
  display: block;
  opacity: 0;
  transform: translateY(60px);
  color: var(--white);
}
.hero-name .accent-line { color: var(--accent); }

.hero-role {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: 1.5rem;
  opacity: 0;
}
.hero-role .divider {
  margin: 0 0.75rem;
  color: var(--text-dim);
}
.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-top: 1rem;
  line-height: 1.7;
  opacity: 0;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  opacity: 0;
  flex-wrap: wrap;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0;
}
.hero-scroll-hint span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.scroll-line {
  width: 50px; height: 1px;
  background: var(--accent);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--white);
  animation: scrollPulse 2s ease infinite;
}
@keyframes scrollPulse {
  0%   { left: -100%; }
  100% { left: 100%; }
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: var(--transition);
  border: 1.5px solid transparent;
  font-family: var(--font-main);
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 24px rgba(0,240,200,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 20px rgba(0,240,200,0.1);
}
.btn-full { width: 100%; justify-content: center; }

/* =============================================
   CONTAINER / SECTION HELPERS
   ============================================= */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 3rem;
}
.section {
  padding: 8rem 0;
  position: relative;
}
.section-dark { background: var(--bg2); }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.section-title {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 4rem;
}
.section-title em {
  color: var(--accent);
  font-style: normal;
}

/* =============================================
   REVEAL ANIMATION
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   ABOUT SECTION
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 6rem;
  align-items: center;
}
.about-image-wrap {
  position: relative;
}
.about-img-bg {
  position: absolute;
  inset: -20px;
  background: radial-gradient(ellipse at center, rgba(0,240,200,0.07) 0%, transparent 70%);
  border-radius: 50%;
}
.about-img-placeholder {
  position: relative;
  width: 280px;
  height: 320px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  overflow: hidden;
}
.about-img-placeholder::before {
  content: '';
  position: absolute;
  top: -1px; left: 50%;
  transform: translateX(-50%);
  width: 60%; height: 1px;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent);
}
.about-img-placeholder svg { width: 100px; opacity: 0.8; }
.about-img-placeholder span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* === YOUR PROFILE PHOTO === */
.about-photo {
  position: relative;
  width: 280px;
  height: 320px;
  object-fit: cover;         /* crops to fill nicely */
  object-position: top;      /* focuses on face/upper body */
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
  filter: brightness(0.95) contrast(1.05);
  transition: filter 0.3s ease, transform 0.3s ease;
}
.about-photo:hover {
  filter: brightness(1) contrast(1.05);
  transform: scale(1.02);
}

.about-content .section-title { margin-bottom: 1.5rem; }
.about-desc {
  color: var(--text-muted);
  line-height: 1.85;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  transition: var(--transition);
}
.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* =============================================
   SKILLS SECTION
   ============================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.skill-category {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}
.skill-category:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.skill-cat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.skill-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: var(--transition);
  cursor: default;
}
.skill-item:last-child { border-bottom: none; }
.skill-item:hover { color: var(--white); padding-left: 6px; }
.skill-icon { color: var(--accent); font-size: 0.6rem; opacity: 0.7; }

/* =============================================
   PROJECTS SECTION
   ============================================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.project-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover {
  border-color: rgba(0,240,200,0.25);
  box-shadow: var(--shadow);
  transform: translateY(-6px);
}
.project-card:hover::before { opacity: 1; }

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}
.project-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}
.project-type {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 100px;
}
.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}
.project-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}
.project-features {
  list-style: none;
  margin-bottom: 1.5rem;
}
.project-features li {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 0.3rem 0;
  padding-left: 1rem;
  position: relative;
}
.project-features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.7rem;
}
.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.project-stack span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--bg3);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.project-arrow {
  position: absolute;
  bottom: 1.5rem;
  right: 2rem;
  font-size: 1.3rem;
  color: var(--text-dim);
  transition: var(--transition);
}
.project-card:hover .project-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* =============================================
   CERTIFICATES SECTION
   ============================================= */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.cert-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
}
.cert-card:hover {
  border-color: rgba(0,240,200,0.3);
  box-shadow: var(--shadow);
  transform: translateY(-6px);
}
.cert-icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
  opacity: 0.8;
}
.cert-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.5rem;
  letter-spacing: -0.3px;
}
.cert-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =============================================
   EXPERIENCE / TIMELINE SECTION
   ============================================= */
.timeline {
  position: relative;
  padding-left: 3rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--accent), transparent);
  opacity: 0.3;
}
.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -3.4rem;
  top: 0.35rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 10px rgba(0,240,200,0.4);
  transition: var(--transition);
}
.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 20px rgba(0,240,200,0.6);
}
.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.timeline-content h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.5rem;
  letter-spacing: -0.4px;
}
.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 600px;
}

/* =============================================
   CONTACT SECTION
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.contact-tagline {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.5;
  letter-spacing: -0.4px;
  margin-bottom: 2.5rem;
}
.contact-details { display: flex; flex-direction: column; gap: 1rem; }
.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}
.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 20px rgba(0,240,200,0.08);
  transform: translateX(4px);
}
.contact-link-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: 6px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Contact Form */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.form-group input,
.form-group textarea {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  color: var(--white);
  font-family: var(--font-main);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,240,200,0.1);
}
.form-success {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  text-align: center;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
}
.form-success.show { display: block; }

/* =============================================
   FOOTER
   ============================================= */
#footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -1px;
}
.footer-social {
  display: flex;
  gap: 1rem;
}
.footer-social a {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(0,240,200,0.15);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-image-wrap { display: flex; justify-content: center; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  #navbar { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  /* Mobile nav open */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(8,12,16,0.98);
    backdrop-filter: blur(20px);
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 800;
  }
  .nav-links.open a { font-size: 1.1rem; }

  .container { padding: 0 1.5rem; }
  .section { padding: 5rem 0; }
  .section-title { font-size: 2rem; letter-spacing: -0.8px; }
  .hero-content { padding: 0 1.5rem; padding-top: 5rem; }
  .hero-scroll-hint { display: none; }

  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .timeline { padding-left: 2rem; }
  .timeline-dot { left: -2.4rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-name { letter-spacing: -2px; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .about-img-placeholder { width: 240px; height: 280px; }
  .about-photo { width: 240px; height: 280px; }
}