/* =============================================
   SUNISH SURESH PORTFOLIO — Premium CSS
   Design System v1.0
   ============================================= */

/* =============================================
   1. CSS VARIABLES (Design Tokens)
   ============================================= */
:root {
  /* Backgrounds */
  --bg-primary:   #050B18;
  --bg-secondary: #0A1628;
  --bg-card:      rgba(13, 27, 42, 0.85);
  --bg-card-solid:#0D1B2A;
  --bg-nav:       rgba(5, 11, 24, 0.92);

  /* Primary — Electric Cyan */
  --primary:             #00D4FF;
  --primary-rgb:         0, 212, 255;
  --primary-glow:        rgba(0, 212, 255, 0.12);
  --primary-glow-strong: rgba(0, 212, 255, 0.28);
  --primary-dark:        #0099BB;

  /* Secondary — Warm Amber */
  --secondary:     #F5A623;
  --secondary-glow:rgba(245, 166, 35, 0.12);

  /* Accent — Electric Violet */
  --accent:        #7B61FF;
  --accent-glow:   rgba(123, 97, 255, 0.12);

  /* Success / Status */
  --success:       #00C896;
  --success-glow:  rgba(0, 200, 150, 0.12);

  /* Text */
  --text-primary:   #E8EDF4;
  --text-secondary: #8BA3C7;
  --text-muted:     #4A6080;

  /* Borders */
  --border-subtle: rgba(0, 212, 255, 0.07);
  --border:        rgba(0, 212, 255, 0.16);
  --border-hover:  rgba(0, 212, 255, 0.38);

  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body:    'Inter', -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Layout */
  --container-max:  1200px;
  --section-gap:    120px;
  --card-radius:    16px;
  --card-radius-sm: 10px;

  /* Animation */
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:   cubic-bezier(0, 0, 0.2, 1);
  --transition: 0.3s var(--ease);

  /* Shadows */
  --shadow-card:       0 4px 24px rgba(0,0,0,0.4), 0 0 0 1px var(--border-subtle);
  --shadow-card-hover: 0 8px 48px rgba(0,212,255,0.09), 0 0 0 1px var(--border);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img        { max-width:100%; display:block; }
a          { color:inherit; text-decoration:none; }
ul, ol     { list-style:none; }
button     { cursor:pointer; border:none; background:none; font:inherit; }
input, textarea { font: inherit; }

::selection {
  background: var(--primary-glow-strong);
  color: var(--primary);
}

/* =============================================
   3. TYPOGRAPHY
   ============================================= */
h1,h2,h3,h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-cyan      { color: var(--primary); }
.highlight-cyan { color: var(--primary); font-weight: 600; }
.highlight-amber{ color: var(--secondary); font-weight: 600; }

/* =============================================
   4. LAYOUT UTILITIES
   ============================================= */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: var(--section-gap) 0; position: relative; }

.section-alt {
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(10,22,40,0.45) 50%,
    transparent 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.8;
}

/* =============================================
   5. BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--primary);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: #2FDEFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,212,255,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.btn-sm    { padding: 8px 16px; font-size: 0.8rem; }
.btn-full  { width: 100%; justify-content: center; }

/* =============================================
   6. NAVIGATION
   ============================================= */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: var(--transition);
  padding: 18px 0;
}

#navbar.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-right: auto;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.logo-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--secondary);
  animation: pulse 2.4s ease-in-out infinite;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-right: 12px;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 13px;
  border-radius: 6px;
  transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: var(--primary-glow);
}

.nav-resume { flex-shrink: 0; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

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

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.55;
}

/* Radial vignette over canvas */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 50%,
    transparent 30%,
    rgba(5,11,24,0.6) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 820px;
  padding: 100px 28px 60px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0,200,150,0.08);
  border: 1px solid rgba(0,200,150,0.22);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--success);
  font-family: var(--font-mono);
  margin-bottom: 32px;
}

.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2.4s ease-in-out infinite;
}

.hero-name {
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: 20px;
}
.hero-name-first { display: block; color: var(--text-primary); }
.hero-name-last {
  display: block;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 55%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1.05rem);
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex-wrap: wrap;
  min-height: 1.7em;
}
.role-static  { color: var(--primary); font-weight: 500; }
.role-divider { color: var(--text-muted); }
.typing-cursor {
  color: var(--primary);
  animation: blink 1s step-end infinite;
}

.hero-tagline {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 20px;
  line-height: 1.75;
}

.hero-location {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 52px;
}

/* Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.stat-item { text-align: center; }

.stat-number-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 1px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}
.stat-suffix {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}
.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 6px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-subtle);
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 1;
}
.scroll-line {
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, var(--primary), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* =============================================
   8. ABOUT
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-showcase {
  position: relative;
  width: 360px;
  height: 410px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin: 15px auto;
  perspective: 1000px;
}

/* Glassmorphic Ambient Backdrop Pedestal */
.showcase-backdrop {
  position: absolute;
  bottom: 0;
  left: 20px;
  right: 20px;
  height: 305px;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(16, 26, 43, 0.85), rgba(9, 15, 26, 0.95));
  border: 1px solid rgba(0, 212, 255, 0.28);
  box-shadow:
    0 25px 60px -15px rgba(0, 0, 0, 0.65),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  overflow: hidden;
  z-index: 1;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.showcase-glow {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.35) 0%, rgba(99, 102, 241, 0.15) 50%, transparent 70%);
  filter: blur(38px);
  z-index: 0;
  transition: transform 0.6s var(--ease), opacity 0.6s var(--ease);
}

.backdrop-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.85;
}

.backdrop-accent-line {
  position: absolute;
  top: 0;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.7;
}

/* Bold Watermark Typography Overlapping Behind Portrait */
.showcase-watermark {
  position: absolute;
  bottom: 150px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-heading);
  font-size: 5.2rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(0, 212, 255, 0.22);
  white-space: nowrap;
  z-index: 2;
  pointer-events: none;
  user-select: none;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), -webkit-text-stroke 0.5s var(--ease);
}

/* Unbounded Portrait Wrapper - Subject breaks out of card boundaries! */
.showcase-portrait-wrapper {
  position: relative;
  z-index: 3;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
}

.profile-photo-dynamic {
  max-height: 108%;
  max-width: 98%;
  object-fit: contain;
  object-position: bottom center;
  border-radius: 0;
  filter: drop-shadow(0 20px 35px rgba(0, 0, 0, 0.75));
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), filter 0.5s var(--ease);
}

/* Dynamic Hover Micro-Animations */
.about-showcase:hover .showcase-backdrop {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.55);
  box-shadow:
    0 30px 70px -12px rgba(0, 212, 255, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.about-showcase:hover .showcase-glow {
  transform: translateX(-50%) scale(1.18);
  opacity: 1;
}

.about-showcase:hover .showcase-watermark {
  transform: translateX(-50%) translateY(-10px);
  -webkit-text-stroke: 1.8px rgba(0, 212, 255, 0.48);
}

.about-showcase:hover .profile-photo-dynamic {
  transform: scale(1.05) translateY(-8px);
  filter: drop-shadow(0 25px 40px rgba(0, 212, 255, 0.28));
}

/* Tech Badges Floating Around Showcase */
.about-tech-badge {
  position: absolute;
  background: rgba(13, 27, 42, 0.92);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 7px 14px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  white-space: nowrap;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 18px rgba(0,0,0,0.35);
  display: flex; align-items: center; gap: 6px;
}
.badge-1 { top: 16px;    right: -36px; }
.badge-2 { bottom: 64px; right: -44px; }
.badge-3 { bottom: 16px; left: -36px; }

.about-content { }

.about-text {
  color: var(--text-secondary);
  font-size: 0.975rem;
  line-height: 1.82;
  margin-bottom: 16px;
}
.about-text strong { color: var(--text-primary); }
.about-text a { color: var(--primary); transition: var(--transition); }
.about-text a:hover { color: #2FDEFF; }

.about-highlights {
  margin: 26px 0;
  display: flex; flex-direction: column; gap: 12px;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius-sm);
  transition: var(--transition);
}
.highlight-item:hover {
  border-color: var(--border);
  background: rgba(0,212,255,0.03);
}

.highlight-icon { font-size: 1.35rem; flex-shrink: 0; margin-top: 2px; }

.highlight-item strong {
  display: block;
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.highlight-item span { font-size: 0.8rem; color: var(--text-muted); }

.about-links { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }

/* =============================================
   9. EXPERIENCE TIMELINE
   ============================================= */
.timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 22px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom,
    transparent, var(--border) 8%, var(--border) 92%, transparent);
}

.timeline-item {
  display: flex;
  gap: 32px;
  margin-bottom: 36px;
}

.timeline-marker {
  position: relative;
  flex-shrink: 0;
  width: 44px;
  display: flex;
  justify-content: center;
  padding-top: 20px;
}

.timeline-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  position: relative; z-index: 1;
  transition: var(--transition);
}
.timeline-dot.current {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow), 0 0 18px var(--primary-glow-strong);
  animation: pulseDot 2.4s ease-in-out infinite;
}

.timeline-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px 32px;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.timeline-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.timeline-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-card-hover);
  transform: translateX(4px);
}
.timeline-card:hover::before { transform: scaleX(1); }
.timeline-item:hover .timeline-dot { border-color: var(--primary); background: var(--primary); }

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.timeline-company-info {
  display: flex; align-items: center; gap: 14px;
}

.company-logo-placeholder {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.hahn-logo     { background: linear-gradient(135deg, #E63946, #C1121F); }
.thm-logo      { background: linear-gradient(135deg, #0077B6, #0096C7); }
.freelance-logo{ background: linear-gradient(135deg, var(--primary), var(--accent)); }
.allied-logo   { background: linear-gradient(135deg, var(--secondary), #D4870A); }

.timeline-role {
  font-size: 1rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.timeline-company {
  font-size: 0.82rem; color: var(--primary);
  font-family: var(--font-mono);
}

.timeline-meta {
  display: flex; flex-direction: column;
  align-items: flex-end; gap: 5px;
  flex-shrink: 0;
}
.timeline-date {
  font-size: 0.78rem; color: var(--text-muted);
  font-family: var(--font-mono); white-space: nowrap;
}
.timeline-badge {
  font-size: 0.7rem;
  padding: 3px 10px; border-radius: 100px;
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.07);
  white-space: nowrap;
}
.current-badge {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: var(--primary-glow-strong);
}

.timeline-location {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.76rem; color: var(--text-muted);
  font-family: var(--font-mono); margin-bottom: 14px;
}

.timeline-bullets { margin-bottom: 16px; }
.timeline-bullets li {
  font-size: 0.875rem; color: var(--text-secondary);
  padding: 3px 0 3px 18px;
  position: relative; line-height: 1.65;
}
.timeline-bullets li::before {
  content: '';
  position: absolute;
  left: 0; top: 12px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--primary); opacity: 0.55;
}

.timeline-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* =============================================
   10. SKILLS
   ============================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
  margin-bottom: 40px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px;
  transition: var(--transition);
}
.skill-category:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-card-hover);
}

.skill-category-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.skill-icon { font-size: 1.35rem; }
.skill-category-header h3 {
  font-size: 0.925rem; font-weight: 600;
  color: var(--text-primary);
}

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

/* Shared tag base */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.73rem;
  font-family: var(--font-mono);
  background: rgba(0,212,255,0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
}
.tag:hover {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: var(--border);
}

/* Tiered skill tags */
.skill-tag {
  display: inline-block;
  padding: 5px 13px;
  border-radius: 100px;
  font-size: 0.76rem;
  font-family: var(--font-mono);
  font-weight: 500;
  transition: var(--transition);
}
.tier-expert {
  background: rgba(0,212,255,0.1);
  color: var(--primary);
  border: 1px solid rgba(0,212,255,0.22);
}
.tier-advanced {
  background: rgba(123,97,255,0.1);
  color: var(--accent);
  border: 1px solid rgba(123,97,255,0.22);
}
.tier-intermediate {
  background: rgba(245,166,35,0.09);
  color: var(--secondary);
  border: 1px solid rgba(245,166,35,0.18);
}

.skills-legend {
  display: flex; align-items: center;
  justify-content: center;
  gap: 20px; flex-wrap: wrap;
}
.legend-item { display: flex; align-items: center; gap: 8px; }

/* =============================================
   11. PROJECTS
   ============================================= */
.project-filters {
  display: flex; justify-content: center;
  gap: 8px; margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 22px; border-radius: 100px;
  font-size: 0.83rem;
  font-family: var(--font-heading); font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  color: var(--primary);
  background: var(--primary-glow);
  border-color: var(--border);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 22px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease),
              border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  position: relative; overflow: hidden;
}
.project-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.project-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.project-card:hover::after { transform: scaleX(1); }

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.project-icon { font-size: 1.9rem; }

.project-badges { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.project-badge {
  font-size: 0.68rem;
  padding: 3px 9px; border-radius: 100px;
  font-family: var(--font-mono); font-weight: 500; border: 1px solid;
}
.project-badge.featured    { background: rgba(245,166,35,0.09); color: var(--secondary); border-color: rgba(245,166,35,0.22); }
.project-badge.industrial  { background: rgba(0,212,255,0.07);  color: var(--primary);   border-color: var(--border-subtle); }
.project-badge.research    { background: rgba(123,97,255,0.09); color: var(--accent);    border-color: rgba(123,97,255,0.2); }
.project-badge.academic    { background: rgba(0,200,150,0.08);  color: var(--success);   border-color: rgba(0,200,150,0.18); }

.project-title {
  font-size: 0.975rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.42;
}
.project-desc {
  font-size: 0.855rem; color: var(--text-secondary);
  line-height: 1.72; flex: 1;
}

.project-impact {
  display: flex; gap: 20px;
  padding: 12px 16px;
  background: rgba(0,212,255,0.04);
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}
.impact-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.2rem; font-weight: 700;
  color: var(--primary); line-height: 1.2;
}
.impact-label {
  display: block;
  font-size: 0.68rem; color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.05em;
}

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

/* =============================================
   12. PUBLICATIONS
   ============================================= */
.publication-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 44px;
  max-width: 880px;
  margin: 0 auto;
  position: relative; overflow: hidden;
}
.publication-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
}

.pub-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.pub-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.pub-journal {
  font-family: var(--font-mono); font-size: 0.78rem;
  color: var(--primary); font-weight: 500;
}
.pub-dot { color: var(--text-muted); }
.pub-date  { font-size: 0.78rem; color: var(--text-muted); font-family: var(--font-mono); }
.pub-badge {
  font-size: 0.7rem; padding: 3px 10px; border-radius: 100px;
  background: rgba(0,200,150,0.08); color: var(--success);
  border: 1px solid rgba(0,200,150,0.18); font-family: var(--font-mono);
}
.pub-badge.peer {
  background: rgba(0,212,255,0.08); color: var(--primary);
  border-color: var(--border-subtle);
}
.pub-icon { font-size: 2rem; opacity: 0.5; }

.pub-title {
  font-size: 1.25rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.45;
  margin-bottom: 16px;
}
.pub-abstract {
  font-size: 0.93rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 24px;
}
.pub-abstract strong { color: var(--text-primary); }

.pub-contributions {
  background: rgba(0,212,255,0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 20px 24px; margin-bottom: 24px;
}
.pub-contributions h4 {
  font-size: 0.78rem; color: var(--primary);
  font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.12em;
  margin-bottom: 12px;
}
.pub-contributions li {
  font-size: 0.875rem; color: var(--text-secondary);
  padding: 4px 0 4px 20px; position: relative; line-height: 1.65;
}
.pub-contributions li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--primary); font-size: 0.78rem;
}

.pub-links {
  display: flex; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
.pub-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* =============================================
   13. EDUCATION
   ============================================= */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 22px;
  max-width: 1040px; margin: 0 auto;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 28px;
  display: flex; gap: 18px;
  transition: var(--transition);
}
.edu-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.edu-icon { font-size: 1.9rem; flex-shrink: 0; margin-top: 2px; }
.edu-content h3 {
  font-size: 0.925rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 6px; line-height: 1.4;
}
.edu-institution {
  display: block; font-size: 0.79rem;
  color: var(--primary); font-family: var(--font-mono);
  margin-bottom: 4px;
}
.edu-date {
  display: block; font-size: 0.75rem;
  color: var(--text-muted); font-family: var(--font-mono);
  margin-bottom: 10px;
}
.edu-details {
  font-size: 0.84rem; color: var(--text-secondary); line-height: 1.65;
}

/* =============================================
   14. CONTACT
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 60px; align-items: start;
  max-width: 920px; margin: 0 auto;
}

.contact-item {
  display: flex; align-items: flex-start;
  gap: 16px; margin-bottom: 22px;
}
.contact-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--primary-glow);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); flex-shrink: 0;
}
.contact-label {
  display: block;
  font-size: 0.7rem; color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.12em;
  margin-bottom: 3px;
}
.contact-value { font-size: 0.925rem; color: var(--text-secondary); }
.contact-value.text-cyan { color: var(--primary); transition: var(--transition); }
.contact-value.text-cyan:hover { color: #2FDEFF; }

.contact-availability {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  background: rgba(0,200,150,0.05);
  border: 1px solid rgba(0,200,150,0.14);
  border-radius: 10px;
  font-size: 0.83rem; color: var(--success);
  margin-top: 4px;
}
.availability-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--success);
  animation: pulse 2.4s ease-in-out infinite; flex-shrink: 0;
}

/* Form */
.contact-form-container {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 34px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.75rem; font-weight: 500;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: rgba(0,212,255,0.03);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* =============================================
   15. FOOTER
   ============================================= */
footer {
  padding: 52px 0 32px;
  border-top: 1px solid var(--border-subtle);
}

.footer-content {
  display: flex; align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 36px; gap: 24px; flex-wrap: wrap;
}
.footer-logo {
  display: block; font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 6px;
}
.footer-tagline {
  font-size: 0.78rem; color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a {
  font-size: 0.86rem; color: var(--text-muted);
  transition: var(--transition); font-family: var(--font-heading);
}
.footer-links a:hover { color: var(--primary); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}
.footer-bottom p {
  font-size: 0.78rem; color: var(--text-muted);
  font-family: var(--font-mono); text-align: center;
}

/* =============================================
   16. ANIMATIONS
   ============================================= */
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:0.55; transform:scale(0.9); }
}

@keyframes pulseDot {
  0%,100% { box-shadow: 0 0 0 4px var(--primary-glow), 0 0 14px var(--primary-glow-strong); }
  50%     { box-shadow: 0 0 0 8px var(--primary-glow), 0 0 28px var(--primary-glow-strong); }
}

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

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes scrollPulse {
  0%,100% { opacity:0.35; }
  50%     { opacity:1; }
}

/* Hero entrance animations */
.animate-fade-in {
  opacity: 0;
  animation: fadeIn 0.9s var(--ease-out) forwards;
}
.animate-slide-up {
  opacity: 0;
  transform: translateY(32px);
  animation: slideUp 0.9s var(--ease-out) forwards;
}
@keyframes fadeIn  { to { opacity:1; } }
@keyframes slideUp { to { opacity:1; transform:translateY(0); } }

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s;  }
.delay-3 { animation-delay: 0.45s; }

/* Scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   17. RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .about-visual { order: -1; }
}

@media (max-width: 768px) {
  :root { --section-gap: 80px; }

  .nav-links, .nav-resume { display: none; }
  .hamburger { display: flex; margin-left: auto; }

  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; inset: 0;
    background: var(--bg-primary);
    align-items: center; justify-content: center;
    gap: 28px; z-index: 999;
  }
  .nav-links.open .nav-link { font-size: 1.35rem; }

  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }

  .timeline::before { left: 16px; }
  .timeline-marker  { width: 32px; padding-top: 18px; }
  .timeline-dot     { width: 12px; height: 12px; }
  .timeline-header  { flex-direction: column; }
  .timeline-meta    { align-items: flex-start; }
  .timeline-card    { padding: 20px 22px; }

  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid  { grid-template-columns: 1fr; }
  .projects-grid{ grid-template-columns: 1fr; }
  .education-grid{ grid-template-columns: 1fr; }

  .badge-1, .badge-2, .badge-3 { display: none; }

  .publication-card { padding: 26px; }
  .pub-header { flex-direction: column; gap: 10px; }

  .footer-content { flex-direction: column; }
  .footer-links { gap: 18px; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }

  .about-showcase { width: 280px; height: 340px; }
  .showcase-backdrop { height: 250px; }
  .showcase-watermark { font-size: 3.6rem; bottom: 120px; }

  .about-links { flex-direction: column; }

  .section-header { margin-bottom: 48px; }
}