/* ============================================================
   SOURAV DE — PORTFOLIO DESIGN SYSTEM
   Dark-first · Cyan accent · Glassmorphism · Canvas FX
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  --bg: #050508;
  --bg-secondary: #0a0a10;
  --bg-card: rgba(12, 12, 20, 0.7);
  --bg-card-hover: rgba(18, 18, 30, 0.85);
  --foreground: #f0f0f5;
  --foreground-muted: #8a8a9a;
  --accent: #00d9ff;
  --accent-glow: rgba(0, 217, 255, 0.15);
  --accent-dim: rgba(0, 217, 255, 0.4);
  --accent-secondary: #7b61ff;
  --accent-gradient: linear-gradient(135deg, #00d9ff 0%, #7b61ff 50%, #ff6bda 100%);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(0, 217, 255, 0.25);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --danger: #ff4d6a;
  --success: #00e676;
  --warning: #ffab40;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.1);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  --font-sans: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --nav-height: 72px;
}

/* --- Global 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 {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--foreground);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-dim);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #fff;
}

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

/* --- Galaxy Canvas Background --- */
#galaxy-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --- Glass Cursor --- */
.glass-cursor {
  position: fixed;
  width: 32px;
  height: 32px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  backdrop-filter: blur(4px);
  background: rgba(0, 217, 255, 0.05);
  transform: translate(-50%, -50%);
  transition: width 0.25s ease, height 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  mix-blend-mode: screen;
  display: none;
}

.glass-cursor.active {
  width: 52px;
  height: 52px;
  border-color: var(--accent-secondary);
  background: rgba(123, 97, 255, 0.08);
}

@media (pointer: fine) {
  .glass-cursor {
    display: block;
  }
  body {
    cursor: none;
  }
  a, button, input, textarea, select, [role="button"], .interactive {
    cursor: none;
  }
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  transition: background var(--transition-base), backdrop-filter var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border);
}

.navbar-inner {
  width: 100%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--foreground);
  text-decoration: none;
}

.nav-logo .accent {
  color: var(--accent);
}

.nav-logo .logo-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--accent); }
  50% { opacity: 0.5; box-shadow: 0 0 24px var(--accent); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--foreground-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.nav-mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--foreground);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-mobile-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-mobile-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(5, 5, 8, 0.95);
  backdrop-filter: blur(24px);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 999;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  display: block;
  padding: 14px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--foreground-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mobile-menu a:hover {
  color: var(--accent);
  background: var(--accent-glow);
}

/* --- Page Container --- */
.page-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* --- Sections --- */
.section {
  padding: 120px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--foreground);
  margin-bottom: 16px;
}

.section-title .gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--foreground-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  padding-bottom: 0;
  position: relative;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--foreground-muted);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 8px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-name .first {
  display: block;
  color: var(--foreground);
}

.hero-name .last {
  display: block;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-roles {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--foreground-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero-roles span:not(.separator) {
  color: var(--accent);
}

.hero-roles .separator {
  color: var(--foreground-muted);
  opacity: 0.3;
}

.hero-rotating-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  min-height: 1.2em;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.7s forwards;
}

.hero-rotating-title .word {
  display: inline-block;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: wordCycle 12s ease-in-out infinite;
}

@keyframes wordCycle {
  0%, 20% { opacity: 1; transform: translateY(0); }
  25%, 30% { opacity: 0; transform: translateY(-20px); }
  35% { opacity: 0; transform: translateY(20px); }
  40%, 60% { opacity: 1; transform: translateY(0); }
  65%, 70% { opacity: 0; transform: translateY(-20px); }
  75% { opacity: 0; transform: translateY(20px); }
  80%, 100% { opacity: 1; transform: translateY(0); }
}

.hero-role-dots {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero-role-dots .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--foreground-muted);
  opacity: 0.3;
  transition: all var(--transition-base);
}

.hero-role-dots .dot.active {
  background: var(--accent);
  opacity: 1;
  width: 24px;
  border-radius: 3px;
  box-shadow: 0 0 12px var(--accent);
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--foreground-muted);
  line-height: 1.8;
  max-width: 500px;
  margin-bottom: 36px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.9s forwards;
}

.hero-bio strong {
  color: var(--foreground);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease 1s forwards;
}

.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  opacity: 0;
  animation: fadeInRight 1s ease 0.5s forwards;
}

.hero-photo-wrapper {
  position: relative;
  width: 340px;
  height: 420px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card), 0 0 60px rgba(0, 217, 255, 0.08);
}

.hero-photo-wrapper::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--accent-gradient);
  border-radius: inherit;
  z-index: -1;
  opacity: 0.4;
  animation: borderGlow 4s ease-in-out infinite;
}

@keyframes borderGlow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

.hero-photo-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-floating-tags {
  position: absolute;
  top: -10px;
  right: -20px;
  display: flex;
  gap: 8px;
}

.floating-tag {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: var(--radius-full);
  color: var(--accent);
  animation: float 4s ease-in-out infinite;
}

.floating-tag:nth-child(2) {
  animation-delay: -1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 0 40px rgba(0, 217, 255, 0.35);
  transform: translateY(-2px);
  color: var(--bg);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent-dim);
}

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

.btn-ghost {
  background: var(--glass-bg);
  color: var(--foreground-muted);
  border-color: var(--glass-border);
}

.btn-ghost:hover {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.btn-icon {
  font-size: 1rem;
}

/* Liquid button ripple effect */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: rippleEffect 0.6s linear;
  pointer-events: none;
}

@keyframes rippleEffect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

/* --- Project Cards --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
}

.project-card {
  position: relative;
  overflow: hidden;
}

.project-card .project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--accent-dim);
}

.project-card .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.project-card .project-tag {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 217, 255, 0.1);
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--foreground-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-card .project-links {
  display: flex;
  gap: 10px;
}

/* --- Skills Grid --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}

.skill-card {
  text-align: center;
  padding: 24px 16px;
}

.skill-card .skill-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--accent-glow);
  border-radius: var(--radius-md);
  color: var(--accent);
  border: 1px solid rgba(0, 217, 255, 0.1);
}

.skill-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.skill-card .skill-level {
  margin-top: 8px;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-card .skill-level-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 1.5s ease;
  width: 0;
}

.skill-card.visible .skill-level-fill {
  width: var(--level);
}

/* --- Credentials Grid --- */
.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.credential-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.credential-card .cred-icon {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  background: var(--accent-glow);
  border: 1px solid rgba(0, 217, 255, 0.1);
}

.credential-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.credential-card .cred-issuer {
  font-size: 0.8rem;
  color: var(--foreground-muted);
  margin-bottom: 8px;
}

.credential-card .cred-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

/* --- Academic Record --- */
.academic-card {
  max-width: 700px;
  margin: 0 auto 40px;
  padding: 36px;
}

.academic-card .acad-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.academic-card .acad-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.academic-card .acad-info p {
  font-size: 0.85rem;
  color: var(--foreground-muted);
}

.academic-card .sgpa-badge {
  text-align: center;
  padding: 16px 24px;
  background: var(--accent-glow);
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: var(--radius-lg);
}

.academic-card .sgpa-value {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.academic-card .sgpa-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground-muted);
  margin-top: 4px;
}

.subject-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.subject-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.8rem;
}

.subject-item .grade {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

/* --- Contact Form --- */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--foreground-muted);
}

.form-group input,
.form-group textarea {
  padding: 14px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--foreground);
  outline: none;
  transition: all var(--transition-fast);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  min-height: 140px;
}

/* --- KIRO AI Chatbot --- */
.kiro-container {
  max-width: 800px;
  margin: 0 auto;
  height: calc(100vh - var(--nav-height) - 80px);
  display: flex;
  flex-direction: column;
}

.kiro-header {
  text-align: center;
  padding: 20px 0;
}

.kiro-header h1 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.kiro-header h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.kiro-header p {
  color: var(--foreground-muted);
  font-size: 0.85rem;
}

.kiro-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 16px 0;
}

.kiro-suggestion {
  padding: 8px 16px;
  font-size: 0.8rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--foreground-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kiro-suggestion:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.kiro-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kiro-message {
  max-width: 85%;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  line-height: 1.7;
  animation: messageIn 0.3s ease;
}

@keyframes messageIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.kiro-message.user {
  align-self: flex-end;
  background: var(--accent);
  color: var(--bg);
  border-bottom-right-radius: 4px;
}

.kiro-message.ai {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.kiro-message.ai strong {
  color: var(--accent);
}

.kiro-message.ai code {
  background: rgba(0, 217, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.kiro-typing {
  align-self: flex-start;
  display: flex;
  gap: 4px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.kiro-typing .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: typingBounce 1.4s ease-in-out infinite;
}

.kiro-typing .dot:nth-child(2) { animation-delay: 0.2s; }
.kiro-typing .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.3; }
  40% { transform: scale(1); opacity: 1; }
}

.kiro-input-area {
  display: flex;
  gap: 10px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
}

.kiro-input {
  flex: 1;
  padding: 14px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--foreground);
  outline: none;
  transition: all var(--transition-fast);
}

.kiro-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.kiro-send-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.kiro-send-btn:hover {
  box-shadow: 0 0 24px rgba(0, 217, 255, 0.3);
  transform: scale(1.05);
}

/* --- Gallery --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition-base);
  cursor: pointer;
}

.gallery-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.gallery-item .gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gallery-item .like-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--foreground);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-item .like-btn:hover,
.gallery-item .like-btn.liked {
  background: rgba(255, 77, 106, 0.2);
  border-color: var(--danger);
  color: var(--danger);
}

/* --- Spectrum Analytics --- */
.spectrum-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.stat-card {
  text-align: center;
  padding: 32px 24px;
}

.stat-card .stat-value {
  font-size: 2.8rem;
  font-weight: 900;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-card .stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground-muted);
}

/* --- Globe Canvas --- */
.globe-container {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  aspect-ratio: 1;
  position: relative;
}

#globe-canvas-el {
  width: 100%;
  height: 100%;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 24px 32px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.footer-brand h3 span {
  color: var(--accent);
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--foreground-muted);
  line-height: 1.7;
  max-width: 350px;
}

.footer-links-group h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground-muted);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--foreground-muted);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--foreground-muted);
}

.footer-bottom .accent-text {
  color: var(--accent);
}

/* --- Page Transition --- */
.page-section {
  display: none;
}

.page-section.active {
  display: block;
  animation: pageIn 0.5s ease;
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Visitor Counter Badge --- */
.visitor-badge {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--foreground-muted);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.visitor-badge:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.visitor-badge .live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* --- Animation Utilities --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.stagger-child {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-child.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-content {
    order: 2;
  }

  .hero-visual {
    order: 1;
  }

  .hero-bio {
    margin: 0 auto 36px;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-roles {
    justify-content: center;
  }

  .hero-role-dots {
    justify-content: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-mobile-toggle {
    display: flex;
  }

  .hero-photo-wrapper {
    width: 260px;
    height: 340px;
  }

  .hero-name {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
  }

  .hero-rotating-title {
    font-size: clamp(1.8rem, 8vw, 3rem);
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .credentials-grid {
    grid-template-columns: 1fr;
  }

  .subject-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }

  .section {
    padding: 80px 16px 60px;
  }

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

@media (max-width: 480px) {
  .hero-photo-wrapper {
    width: 220px;
    height: 290px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .kiro-message {
    max-width: 95%;
  }
}

/* --- Utilities --- */
.text-accent { color: var(--accent); }
.text-muted { color: var(--foreground-muted); }
.text-center { text-align: center; }
.font-mono { font-family: var(--font-mono); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }
.gap-4 { gap: 16px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid { display: grid; }
.hidden { display: none; }

/* Night mode overlay */
.night-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.night-overlay.active {
  opacity: 1;
}

/* Tooltip */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  color: var(--foreground);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-fast);
}

.tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- Visitor Lounge --- */
.lounge-container {
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  overflow: hidden;
}

.lounge-info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(0, 217, 255, 0.03);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
}

.lounge-presence {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--foreground-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.lounge-user-identity {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 500;
}

.lounge-messages {
  height: 400px;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lounge-system-msg {
  text-align: center;
  padding: 10px 16px;
  font-size: 0.8rem;
  color: var(--foreground-muted);
  background: rgba(0, 217, 255, 0.05);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 217, 255, 0.08);
}

.lounge-msg {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  animation: messageIn 0.3s ease;
}

.lounge-msg-avatar {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--bg);
}

.lounge-msg-body {
  flex: 1;
}

.lounge-msg-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.lounge-msg-name {
  font-weight: 600;
  font-size: 0.8rem;
}

.lounge-msg-time {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--foreground-muted);
  opacity: 0.6;
}

.lounge-msg-text {
  font-size: 0.88rem;
  color: var(--foreground);
  line-height: 1.6;
}

.lounge-msg-reactions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.lounge-reaction-chip {
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  border: 1px solid var(--border);
}

.lounge-input-area {
  display: flex;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.01);
}

.lounge-name-input {
  width: 130px;
  padding: 10px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 500;
  outline: none;
  transition: all var(--transition-fast);
}

.lounge-name-input:focus {
  border-color: var(--accent);
}

.lounge-msg-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--foreground);
  outline: none;
  transition: all var(--transition-fast);
}

.lounge-msg-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.lounge-reactions-bar {
  display: flex;
  gap: 6px;
  padding: 10px 20px;
  border-top: 1px solid var(--border);
  justify-content: center;
}

.lounge-react-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lounge-react-btn:hover {
  background: var(--accent-glow);
  border-color: var(--accent-dim);
  transform: scale(1.15);
}

/* --- Spectrum Analytics --- */
.spectrum-breakdown {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spectrum-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.spectrum-row-label {
  font-size: 0.8rem;
  color: var(--foreground-muted);
  min-width: 130px;
  white-space: nowrap;
}

.spectrum-bar-wrap {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.spectrum-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), rgba(0, 217, 255, 0.6));
  border-radius: var(--radius-full);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 8px rgba(0, 217, 255, 0.2);
}

.spectrum-bar-purple {
  background: linear-gradient(90deg, var(--accent-secondary), rgba(123, 97, 255, 0.6));
  box-shadow: 0 0 8px rgba(123, 97, 255, 0.2);
}

.spectrum-row-value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  min-width: 40px;
  text-align: right;
}

.spectrum-chart {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (max-width: 768px) {
  .lounge-name-input {
    width: 90px;
    font-size: 0.75rem;
  }
  
  .lounge-messages {
    height: 300px;
  }

  .spectrum-row-label {
    min-width: 80px;
    font-size: 0.72rem;
  }
}