/* =============================================
   BHAVYA MALHOTRA — PORTFOLIO CSS
   Palette: Navy · Cyan · Violet · Slate
   Type: JetBrains Mono + Inter
   ============================================= */

:root {
  --navy:    #0A0F1E;
  --slate:   #1E2A40;
  --slate2:  #253347;
  --off-white: #E8EDF5;
  --muted:   #8892A4;
  --cyan:    #00D4FF;
  --cyan-dim: rgba(0, 212, 255, 0.12);
  --violet:  #6B5CE7;
  --violet-dim: rgba(107, 92, 231, 0.15);
  --border:  rgba(255,255,255,0.07);
  --font-mono: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;
  --radius:  12px;
  --radius-sm: 6px;
  --transition: 0.25s ease;
}

/* RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--off-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { display: block; max-width: 100%; }

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy); }
::-webkit-scrollbar-thumb { background: var(--slate2); border-radius: 3px; }

/* =============================================
   LAYOUT
   ============================================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--slate);
}

/* =============================================
   NAV
   ============================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 0;
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--off-white);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--off-white); }

.nav-cta {
  color: var(--cyan) !important;
  border: 1px solid rgba(0, 212, 255, 0.35);
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition) !important;
}

.nav-cta:hover {
  background: var(--cyan-dim);
  color: var(--cyan) !important;
}

.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(--off-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* MOBILE MENU */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 99;
  background: rgba(10, 15, 30, 0.97);
  backdrop-filter: blur(20px);
  padding: 100px 32px 40px;
}

.mobile-menu.open { display: flex; align-items: center; }

.mobile-menu ul {
  list-style: none;
  width: 100%;
}

.mobile-menu ul li {
  border-bottom: 1px solid var(--border);
}

.mobile-link {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--off-white);
  padding: 20px 0;
  transition: color var(--transition);
}

.mobile-link:hover { color: var(--cyan); }

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 32px 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 760px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

/* TERMINAL */
.terminal-window {
  width: 100%;
  background: rgba(15, 22, 40, 0.85);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(0,212,255,0.05),
    0 24px 80px rgba(0,0,0,0.5),
    0 0 60px rgba(0,212,255,0.06);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.terminal-bar {
  background: rgba(30, 42, 64, 0.9);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 13px; height: 13px;
  border-radius: 50%;
}
.dot.red    { background: #FF5F57; }
.dot.yellow { background: #FEBC2E; }
.dot.green  { background: #28C840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-left: 8px;
}

.terminal-body {
  padding: 28px 28px 32px;
  min-height: 200px;
}

.terminal-line {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--off-white);
  margin-bottom: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.prompt { color: var(--cyan); }

.cursor {
  color: var(--cyan);
  animation: blink 1s step-end infinite;
  display: inline-block;
}

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

.terminal-output {
  margin-top: 4px;
}

.terminal-output-line {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s, transform 0.3s;
}

.terminal-output-line.visible {
  opacity: 1;
  transform: translateY(0);
}

.terminal-output-line .key { color: var(--cyan); }
.terminal-output-line .val { color: var(--off-white); }
.terminal-output-line .dim { color: var(--muted); }
.terminal-output-line .violet-text { color: #a89df0; }

/* HERO BUTTONS */
.hero-cta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--cyan);
  color: var(--navy);
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.3px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.btn-primary:hover {
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.35);
  transform: translateY(-2px);
}

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition);
}

.btn-ghost:hover {
  color: var(--off-white);
  border-color: rgba(255,255,255,0.2);
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 1px;
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* =============================================
   SECTION SHARED
   ============================================= */
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--off-white);
  margin-bottom: 24px;
}

.section-sub {
  color: var(--muted);
  font-size: 1rem;
  max-width: 560px;
  margin-bottom: 56px;
}

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

/* =============================================
   ABOUT
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 18px;
  font-size: 1.05rem;
  line-height: 1.75;
}

.about-text p:last-child { margin-bottom: 0; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--slate);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--transition);
}

.stat-card:hover { border-color: rgba(0,212,255,0.25); }

.stat-num {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.3;
}

/* =============================================
   SKILLS
   ============================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.skill-group {
  background: rgba(10, 15, 30, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition);
}

.skill-group:hover {
  border-color: rgba(0,212,255,0.2);
}

.skill-group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

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

.skill-group-header h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--off-white);
}

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

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 5px 12px;
  border-radius: 100px;
  font-weight: 500;
}

.tag.solid {
  background: var(--cyan-dim);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.25);
}

.tag.learning {
  background: var(--violet-dim);
  color: #a89df0;
  border: 1px solid rgba(107,92,231,0.3);
}

.tag-legend {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* =============================================
   PROJECTS
   ============================================= */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.project-card {
  background: var(--slate);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.project-card::before {
  content: attr(data-index);
  position: absolute;
  top: 36px;
  right: 36px;
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(0,212,255,0.06);
  line-height: 1;
  pointer-events: none;
}

.project-card:hover {
  border-color: rgba(0,212,255,0.25);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--violet);
  border: 1px solid rgba(107,92,231,0.35);
  padding: 3px 10px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.project-name {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--off-white);
  margin-bottom: 8px;
}

.project-tagline {
  color: var(--muted);
  font-size: 0.95rem;
}

.project-links {
  flex-shrink: 0;
  display: flex;
  gap: 12px;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  white-space: nowrap;
}

.project-link:hover { background: var(--cyan-dim); }

.project-desc {
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

.project-details {
  background: rgba(10, 15, 30, 0.5);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detail-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  font-size: 0.85rem;
}

.detail-label {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.75rem;
  padding-top: 2px;
}

.detail-val {
  color: var(--muted);
  line-height: 1.6;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(255,255,255,0.05);
  color: var(--off-white);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* =============================================
   CERTS
   ============================================= */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.cert-card {
  background: rgba(10, 15, 30, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color var(--transition), transform var(--transition);
}

.cert-card:hover {
  border-color: rgba(0,212,255,0.25);
  transform: translateY(-4px);
}

.cert-card.cert-learning {
  border-style: dashed;
  border-color: rgba(107,92,231,0.3);
}

.cert-card.cert-learning:hover {
  border-color: rgba(107,92,231,0.55);
}

.cert-icon { font-size: 2rem; }

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  letter-spacing: 1px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

.cert-learning .cert-issuer { color: #a89df0; }

.cert-name {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--off-white);
  margin-bottom: 10px;
}

.cert-desc {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
  flex: 1;
}

.cert-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  transition: color var(--transition);
}

.cert-link:hover { color: var(--off-white); }
.cert-learning .cert-link { color: #a89df0; }

/* =============================================
   EDUCATION / TIMELINE
   ============================================= */
.timeline {
  position: relative;
  padding-left: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), rgba(107,92,231,0.4), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -41px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--slate);
  border: 2px solid var(--muted);
  transition: border-color var(--transition);
}

.timeline-item.active .timeline-dot {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(0,212,255,0.4);
  background: var(--cyan);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge-current {
  font-size: 0.65rem;
  background: rgba(0,212,255,0.15);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 8px rgba(0,212,255,0.3); }
}

.timeline-school {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--off-white);
  margin-bottom: 10px;
}

.timeline-detail {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 560px;
}

/* =============================================
   CONTACT
   ============================================= */
.contact-container {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.contact-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 48px;
  line-height: 1.75;
}

.contact-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(10, 15, 30, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 28px;
  transition: border-color var(--transition), transform var(--transition);
  text-align: left;
}

.contact-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-3px);
}

.contact-icon {
  font-size: 1.3rem;
  color: var(--cyan);
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 2px;
}

.contact-val {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--off-white);
  display: block;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.footer-made {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 700px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .container { padding: 0 20px; }

  .section { padding: 72px 0; }

  .hero { padding: 100px 20px 60px; }

  .section-title { font-size: 1.7rem; }

  .terminal-body { padding: 20px; }

  .about-stats { grid-template-columns: 1fr 1fr; }

  .project-card { padding: 24px; }
  .project-card::before { display: none; }

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

  .detail-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.nav-links a.active {
  color: var(--cyan);
}

.nav-logo .accent {
  animation: blinkCursor 1.2s infinite;
}

@keyframes blinkCursor {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.nav-logo:hover {
  color: var(--cyan);
}
/* =============================================
   SEO: Visually hidden H1 — crawlable by Google
   but invisible to users (screen-reader friendly)
   ============================================= */
.seo-h1 {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}