/* ============================================================
   BHARGAV VAGADIYA — PORTFOLIO STYLESHEET
   Dark theme | Glassmorphism | Electric palette
   ============================================================ */

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

:root {
  --bg-base:        #07080f;
  --bg-alt:         #0c0e1a;
  --bg-card:        rgba(255,255,255,0.04);
  --bg-card-hover:  rgba(255,255,255,0.08);

  --accent:         #6366f1;       /* indigo */
  --accent-2:       #8b5cf6;       /* violet */
  --accent-3:       #06b6d4;       /* cyan */
  --accent-glow:    rgba(99,102,241,0.35);

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  --border:         rgba(255,255,255,0.07);
  --border-hover:   rgba(99,102,241,0.4);

  --radius-sm:  8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-glow: 0 0 40px rgba(99,102,241,0.15);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'Fira Code', monospace;

  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- SELECTION ---------- */
::selection { background: var(--accent); color: #fff; }

/* ============================================================
   UTILITIES
   ============================================================ */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 12px;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- BUTTONS ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  padding: 14px 32px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 24px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-glow); }
.btn-primary svg { width: 18px; height: 18px; }
.btn-primary.btn-full { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  padding: 13px 28px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-hover);
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================================
   NAVBAR
   ============================================================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: background 0.4s, box-shadow 0.4s;
}
#navbar.scrolled {
  background: rgba(7,8,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 24px;
}
.nav-logo {
  font-size: 1.5rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
}
.nav-logo .dot { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }
.nav-links .btn-nav {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 100px;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
  display: block;
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 24px 40px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('hero_bg.png') center/cover no-repeat;
  opacity: 0.18;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 60% 40%, rgba(99,102,241,0.15) 0%, transparent 65%),
              radial-gradient(ellipse at 20% 80%, rgba(139,92,246,0.1) 0%, transparent 50%);
}

#particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

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

#hero .container-hero {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  width: 100%;
}

/* Since hero uses its own layout: */
#hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 120px 24px 60px;
  min-height: 100vh;
}
#hero .hero-bg, #hero .hero-particles {
  position: fixed;
  inset: 0;
  z-index: -1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  color: #10b981;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.badge-dot {
  width: 7px; height: 7px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.hero-sub {
  display: block;
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--text-secondary);
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-desc strong { color: var(--text-primary); }
.hero-desc em { color: var(--accent); font-style: normal; }

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}
.stat { text-align: center; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat span { font-size: 1.6rem; font-weight: 800; color: var(--accent-2); }
.stat p { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; font-weight: 500; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* ---- PHONE MOCKUP ---- */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.phone-mockup {
  width: 240px;
  height: 480px;
  background: linear-gradient(145deg, #1e2240, #111428);
  border-radius: 36px;
  border: 2px solid rgba(99,102,241,0.3);
  box-shadow: 0 0 0 6px rgba(99,102,241,0.06), 0 32px 80px rgba(0,0,0,0.6), 0 0 60px rgba(99,102,241,0.2);
  position: relative;
  overflow: hidden;
  padding: 40px 16px 20px;
  animation: phone-float 4s ease-in-out infinite;
}
@keyframes phone-float {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-16px) rotate(-2deg); }
}
.phone-notch {
  position: absolute;
  top: 14px; left: 50%; transform: translateX(-50%);
  width: 80px; height: 18px;
  background: #07080f;
  border-radius: 12px;
}
.phone-screen {
  background: #0a0c18;
  border-radius: 16px;
  height: 100%;
  overflow: hidden;
  padding: 12px 10px;
  border: 1px solid rgba(99,102,241,0.15);
}
.screen-code {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  line-height: 1.7;
  color: var(--text-secondary);
}
.code-line { white-space: nowrap; }
.kw { color: #C792EA; }
.cl { color: #82AAFF; }
.fn { color: #82AAFF; }
.code-cursor {
  display: inline-block;
  width: 7px; height: 13px;
  background: var(--accent);
  margin-top: 4px;
  animation: blink 1.2s step-end infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.phone-home-btn {
  position: absolute;
  bottom: 8px; left: 50%; transform: translateX(-50%);
  width: 60px; height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
}

/* Floating chips */
.floating-chip {
  position: absolute;
  background: rgba(7,8,15,0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 100px;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  box-shadow: var(--shadow-glow);
}
.chip-icon { width: 18px; height: 18px; border-radius: 4px; object-fit: contain; background: #fff; padding: 1px; }
.chip-1 { top: 60px; right: -30px; animation: chip-float 3.5s ease-in-out infinite; }
.chip-2 { bottom: 120px; right: -50px; animation: chip-float 3.5s ease-in-out infinite 0.8s; }
.chip-3 { top: 160px; left: -50px; animation: chip-float 3.5s ease-in-out infinite 1.5s; }
@keyframes chip-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---------- HERO ANIMATIONS ---------- */
.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: reveal-in 0.7s cubic-bezier(0.4,0,0.2,1) forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes reveal-in {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.about-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 1.02rem;
}
.about-text strong { color: var(--text-primary); }
.about-text em { color: var(--accent); font-style: normal; }

.about-links { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.icon-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.icon-link svg { width: 18px; height: 18px; flex-shrink: 0; }
.icon-link:hover { color: var(--accent); }

.about-card-wrap { display: flex; flex-direction: column; gap: 20px; }
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: var(--transition);
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.about-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.about-card-icon { font-size: 1.8rem; flex-shrink: 0; }
.about-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.about-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }

/* ============================================================
   TIMELINE / EXPERIENCE
   ============================================================ */
.timeline { position: relative; padding-left: 36px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 11px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent);
}
.timeline-item { position: relative; margin-bottom: 48px; }
.timeline-dot {
  position: absolute;
  left: -36px; top: 20px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: 3px solid var(--bg-alt);
  box-shadow: 0 0 12px var(--accent-glow);
}
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  transition: var(--transition);
}
.timeline-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}
.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.tl-role { font-size: 1.1rem; font-weight: 700; }
.tl-company { color: var(--accent); font-size: 0.9rem; margin-top: 2px; }
.tl-period {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 100px;
  white-space: nowrap;
}
.tl-list { display: flex; flex-direction: column; gap: 8px; }
.tl-list li {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  padding-left: 16px;
  position: relative;
}
.tl-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.tl-list strong { color: var(--text-primary); }
.tl-list em { color: var(--accent-2); font-style: normal; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4), 0 0 32px var(--accent-glow);
}
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}
.project-icon {
  width: 52px; height: 52px;
  background: color-mix(in srgb, var(--accent, #6366f1) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent, #6366f1) 30%, transparent);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
}
.project-badges { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; }
.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
}
.badge-live { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.badge-role { background: rgba(99,102,241,0.15); color: var(--accent); border: 1px solid rgba(99,102,241,0.3); }

.project-name { font-size: 1.2rem; font-weight: 800; margin-bottom: 2px; }
.project-type { color: var(--text-muted); font-size: 0.82rem; margin-bottom: 12px; }
.project-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.65; margin-bottom: 16px; flex: 1; }

.project-highlights { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.project-highlights li {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
  padding-left: 14px;
  position: relative;
}
.project-highlights li::before { content: '›'; position: absolute; left: 0; color: var(--accent); }

.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.project-tags span {
  font-size: 0.73rem;
  font-weight: 500;
  padding: 4px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  transition: var(--transition);
}
.project-card:hover .project-tags span {
  border-color: rgba(99,102,241,0.25);
  color: var(--text-secondary);
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}
.skill-group:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}
.skill-group-icon { font-size: 1.5rem; margin-bottom: 10px; }
.skill-group h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary); }
.skill-pills { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-pills span {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 4px 10px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 100px;
  color: var(--accent);
  transition: var(--transition);
}
.skill-group:hover .skill-pills span {
  background: rgba(99,102,241,0.18);
  border-color: rgba(99,102,241,0.4);
}

/* ============================================================
   EDUCATION
   ============================================================ */
.edu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: var(--transition);
}
.edu-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.edu-award { border-color: rgba(251,191,36,0.25); }
.edu-award:hover { border-color: rgba(251,191,36,0.5); }
.edu-icon { font-size: 2rem; flex-shrink: 0; }
.edu-body { display: flex; flex-direction: column; gap: 6px; }
.edu-body h3 { font-size: 0.98rem; font-weight: 700; line-height: 1.35; }
.edu-body small { font-weight: 400; color: var(--text-secondary); }
.edu-school { color: var(--accent); font-size: 0.85rem; }
.edu-year {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
  width: fit-content;
}
.edu-cgpa {
  font-size: 0.8rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  padding: 4px 12px;
  border-radius: 100px;
  width: fit-content;
}
.edu-note { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-tile {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition);
}
.contact-tile:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow);
}
.contact-tile-icon { font-size: 1.5rem; flex-shrink: 0; }
.tile-label { color: var(--text-muted); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }
.tile-value { color: var(--text-primary); font-size: 0.88rem; margin-top: 2px; }

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.83rem; font-weight: 600; color: var(--text-secondary); }
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border 0.2s, box-shadow 0.2s;
  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(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.form-success {
  display: none;
  text-align: center;
  color: #10b981;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 12px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius-sm);
}
.form-error {
  display: none;
  text-align: center;
  color: #f87171;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 12px;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: var(--radius-sm);
}

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-base);
}
.footer-copy { color: var(--text-secondary); font-size: 0.88rem; }
.footer-copy strong { color: var(--accent); }
.footer-sub { color: var(--text-muted); font-size: 0.78rem; margin-top: 6px; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4,0,0.2,1), transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-grid { grid-template-columns: 1fr 1fr; }
  .edu-grid .edu-award { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  #hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 110px 24px 60px;
    gap: 40px;
  }
  .hero-desc { max-width: 100%; }
  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(7,8,15,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.3rem; }
  .hamburger { display: flex; z-index: 1001; }
  .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.active span:nth-child(2) { opacity: 0; }
  .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 480px) {
  .section { padding: 70px 0; }
  .hero-title { font-size: 2.2rem; }
  .skills-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   AI CHAT WIDGET
   ============================================================ */

/* --- FAB Button --- */
.chat-fab {
  position: fixed;
  bottom: 28px; right: 28px;
  z-index: 9999;
  width: 60px; height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 32px rgba(99,102,241,0.45), 0 2px 8px rgba(0,0,0,0.3);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.3s;
  outline: none;
}
.chat-fab:hover { transform: scale(1.1); box-shadow: 0 12px 40px rgba(99,102,241,0.6); }
.chat-fab:active { transform: scale(0.95); }

/* Pulse ring */
.chat-fab::before {
  content: '';
  position: absolute; inset: -6px;
  border-radius: 50%;
  border: 2px solid rgba(99,102,241,0.45);
  animation: fab-pulse 2.5s ease-out infinite;
}
@keyframes fab-pulse {
  0%   { transform: scale(1); opacity: 0.9; }
  100% { transform: scale(1.55); opacity: 0; }
}

.chat-fab-icon { display: flex; align-items: center; justify-content: center; }
.chat-fab-icon svg { width: 26px; height: 26px; color: #fff; }

/* Tooltip */
.chat-fab-tooltip {
  position: absolute;
  right: calc(100% + 14px); top: 50%; transform: translateY(-50%);
  background: rgba(7,8,15,0.92);
  color: var(--text-primary);
  font-size: 0.78rem; font-weight: 500;
  padding: 7px 13px;
  border-radius: 8px;
  border: 1px solid var(--border);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0; transition: opacity 0.2s;
  backdrop-filter: blur(8px);
}
.chat-fab-tooltip::after {
  content: '';
  position: absolute; left: 100%; top: 50%; transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: rgba(7,8,15,0.92);
}
.chat-fab:hover .chat-fab-tooltip { opacity: 1; }

/* --- Chat Panel --- */
.chat-panel {
  position: fixed;
  bottom: 104px; right: 28px;
  z-index: 9998;
  width: 380px; height: 560px;
  background: rgba(7,8,15,0.94);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 20px;
  box-shadow:
    0 24px 80px rgba(0,0,0,0.55),
    0 0 0 1px rgba(99,102,241,0.08),
    0 0 80px rgba(99,102,241,0.07);
  display: flex; flex-direction: column;
  overflow: hidden;
  /* Hidden by default */
  transform: translateY(20px) scale(0.96);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1), opacity 0.25s ease;
  transform-origin: bottom right;
}
.chat-panel.open {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: all;
}

/* Header */
.chat-header {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  padding: 14px 18px;
  display: flex; align-items: center; gap: 12px;
  flex-shrink: 0;
}
.chat-header-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: 2px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 800; color: #fff;
  flex-shrink: 0; letter-spacing: -0.02em;
}
.chat-header-info { flex: 1; }
.chat-header-name { font-size: 0.92rem; font-weight: 700; color: #fff; }
.chat-status {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.7rem; color: rgba(255,255,255,0.75); margin-top: 2px;
}
.chat-status-dot {
  width: 6px; height: 6px; background: #4ade80;
  border-radius: 50%; animation: pulse-dot 2s infinite;
}
.chat-close-btn {
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(255,255,255,0.15); border: none; color: #fff;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s; flex-shrink: 0;
}
.chat-close-btn:hover { background: rgba(255,255,255,0.28); }
.chat-close-btn svg { width: 15px; height: 15px; }

/* Messages area */
.chat-messages {
  flex: 1; overflow-y: auto;
  padding: 16px; display: flex; flex-direction: column; gap: 12px;
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 3px; }
.chat-messages::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.35); border-radius: 2px; }

/* Welcome */
.chat-welcome {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; padding: 8px 0; gap: 14px;
}
.chat-welcome-icon { font-size: 2.4rem; animation: float-icon 3s ease-in-out infinite; }
@keyframes float-icon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.chat-welcome h3 { font-size: 0.92rem; font-weight: 700; margin-bottom: 4px; }
.chat-welcome p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }

/* Suggestion chips */
.chat-suggestions { display: flex; flex-direction: column; gap: 7px; width: 100%; }
.chat-suggestion-chip {
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 10px; padding: 9px 13px;
  font-size: 0.8rem; color: var(--text-secondary);
  cursor: pointer; text-align: left;
  display: flex; align-items: center; gap: 8px;
  transition: all 0.2s; font-family: var(--font-sans);
}
.chat-suggestion-chip:hover {
  background: rgba(99,102,241,0.16);
  border-color: rgba(99,102,241,0.4);
  color: var(--text-primary);
  transform: translateX(3px);
}
.chat-suggestion-chip span { font-size: 0.88rem; flex-shrink: 0; }

/* Message rows */
.chat-msg {
  display: flex; gap: 8px; align-items: flex-end; max-width: 100%;
  animation: msg-in 0.3s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.chat-msg.user { flex-direction: row-reverse; }

.msg-avatar {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.6rem; font-weight: 700;
}
.chat-msg.ai   .msg-avatar { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.chat-msg.user .msg-avatar { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); color: var(--text-muted); }

.msg-bubble {
  max-width: 78%; padding: 10px 14px; border-radius: 16px;
  font-size: 0.85rem; line-height: 1.65; word-wrap: break-word;
}
.chat-msg.ai   .msg-bubble { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08); border-bottom-left-radius: 4px; color: var(--text-primary); max-width: 95%; }
.chat-msg.user .msg-bubble { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-bottom-right-radius: 4px; }


/* Typing indicator */
.chat-typing { display: flex; gap: 8px; align-items: flex-end; }
.typing-bubble {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px; border-bottom-left-radius: 4px;
  padding: 12px 14px; display: flex; gap: 5px; align-items: center;
}
.typing-dot {
  width: 6px; height: 6px; background: var(--accent);
  border-radius: 50%; animation: typing-bounce 1.4s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.18s; }
.typing-dot:nth-child(3) { animation-delay: 0.36s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%            { transform: translateY(-6px); opacity: 1; }
}

/* Input area */
.chat-input-area {
  padding: 10px 14px 14px;
  border-top: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.15); flex-shrink: 0;
}
.chat-input-row {
  display: flex; gap: 8px; align-items: flex-end;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px; padding: 8px 8px 8px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.chat-input-row:focus-within {
  border-color: rgba(99,102,241,0.5);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.chat-input {
  flex: 1; background: none; border: none;
  color: var(--text-primary); font-family: var(--font-sans);
  font-size: 0.88rem; outline: none; resize: none;
  max-height: 90px; min-height: 22px; line-height: 1.5;
  overflow-y: auto;
}
.chat-input::placeholder { color: var(--text-muted); }
.chat-send-btn {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s, opacity 0.2s; flex-shrink: 0;
}
.chat-send-btn:hover { transform: scale(1.08); }
.chat-send-btn:active { transform: scale(0.93); }
.chat-send-btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; }
.chat-send-btn svg { width: 15px; height: 15px; color: #fff; }

.chat-powered-by {
  text-align: center; font-size: 0.65rem; color: var(--text-muted);
  margin-top: 8px; letter-spacing: 0.04em;
}

/* Error bubble */
.msg-bubble.error { background: rgba(248,113,113,0.12); border-color: rgba(248,113,113,0.25); color: #fca5a5; }

/* Mobile */
@media (max-width: 480px) {
  .chat-panel { width: calc(100vw - 24px); right: 12px; bottom: 92px; height: 70vh; }
  .chat-fab   { bottom: 18px; right: 16px; }
}

/* ============================================================
   AI BUBBLE — MARKDOWN STYLES
   All rules scoped to .chat-msg.ai .msg-bubble to avoid leaking
   ============================================================ */

.chat-msg.ai .msg-bubble { font-size: 0.84rem; line-height: 1.7; }

/* Paragraphs */
.chat-msg.ai .msg-bubble p { margin: 0 0 8px; }
.chat-msg.ai .msg-bubble p:last-child { margin-bottom: 0; }

/* ---- Tables ---- */
.chat-msg.ai .msg-bubble .table-wrap {
  overflow-x: auto;
  margin: 8px 0;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.08);
}
.chat-msg.ai .msg-bubble table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
  white-space: nowrap;   /* keep columns from wrapping mid-word */
}
.chat-msg.ai .msg-bubble thead {
  background: rgba(99,102,241,0.18);
}
.chat-msg.ai .msg-bubble th {
  padding: 7px 10px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
  border-bottom: 1px solid rgba(99,102,241,0.3);
}
.chat-msg.ai .msg-bubble td {
  padding: 6px 10px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  white-space: normal;   /* allow long values to wrap inside cells */
  max-width: 140px;
}
.chat-msg.ai .msg-bubble tr:last-child td { border-bottom: none; }
.chat-msg.ai .msg-bubble tbody tr:nth-child(even) {
  background: rgba(255,255,255,0.03);
}
.chat-msg.ai .msg-bubble tbody tr:hover {
  background: rgba(99,102,241,0.07);
}


/* Headings */
.chat-msg.ai .msg-bubble h1,
.chat-msg.ai .msg-bubble h2,
.chat-msg.ai .msg-bubble h3 {
  font-weight: 700;
  line-height: 1.3;
  margin: 10px 0 4px;
  color: var(--text-primary);
}
.chat-msg.ai .msg-bubble h1 { font-size: 1rem; }
.chat-msg.ai .msg-bubble h2 { font-size: 0.94rem; }
.chat-msg.ai .msg-bubble h3 { font-size: 0.88rem; }

/* Bold & italic */
.chat-msg.ai .msg-bubble strong { font-weight: 700; color: #fff; }
.chat-msg.ai .msg-bubble em     { font-style: italic; color: var(--accent-3); }

/* Inline code */
.chat-msg.ai .msg-bubble code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(99,102,241,0.18);
  border: 1px solid rgba(99,102,241,0.25);
  color: #c4b5fd;
  padding: 1px 6px;
  border-radius: 5px;
}

/* Code blocks */
.chat-msg.ai .msg-bubble pre {
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 8px 0;
}
.chat-msg.ai .msg-bubble pre code {
  background: none;
  border: none;
  padding: 0;
  color: #a5f3fc;
  font-size: 0.76rem;
  line-height: 1.65;
}

/* Lists */
.chat-msg.ai .msg-bubble ul,
.chat-msg.ai .msg-bubble ol {
  padding-left: 18px;
  margin: 6px 0 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.chat-msg.ai .msg-bubble ul { list-style: none; padding-left: 0; }
.chat-msg.ai .msg-bubble ul li {
  padding-left: 16px;
  position: relative;
  color: var(--text-secondary);
}
.chat-msg.ai .msg-bubble ul li::before {
  content: '▹';
  position: absolute; left: 0;
  color: var(--accent);
}
.chat-msg.ai .msg-bubble ol { list-style: decimal; }
.chat-msg.ai .msg-bubble ol li { color: var(--text-secondary); }

/* Blockquote */
.chat-msg.ai .msg-bubble blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 12px;
  margin: 8px 0;
  background: rgba(99,102,241,0.07);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Horizontal rule */
.chat-msg.ai .msg-bubble hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin: 10px 0;
}

/* Links */
.chat-msg.ai .msg-bubble a {
  color: var(--accent-3);
  text-decoration: underline;
  text-decoration-color: rgba(6,182,212,0.4);
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.chat-msg.ai .msg-bubble a:hover { color: #fff; }