/* --- CSS Variables & Design System --- */
:root {
  --bg-primary: #060913;
  --bg-secondary: #0c1225;
  --bg-card: rgba(17, 25, 46, 0.65);
  --bg-card-hover: rgba(26, 37, 68, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(0, 229, 255, 0.4);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-blue: #0072ff;
  --accent-cyan: #00f5d4;
  --accent-purple: #7b2cbf;
  --accent-gradient: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
  --purple-gradient: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.15);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --glow-1: rgba(0, 114, 255, 0.07);
  --glow-2: rgba(123, 44, 191, 0.06);
}

/* Emerald Mint Theme */
body[data-theme="mint"] {
  --bg-primary: #040d0a;
  --bg-secondary: #091c16;
  --bg-card: rgba(10, 30, 24, 0.65);
  --bg-card-hover: rgba(15, 45, 36, 0.8);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-active: rgba(16, 185, 129, 0.4);
  --text-primary: #e6f9f0;
  --text-secondary: #a7f3d0;
  --text-muted: #34d399;
  --accent-blue: #059669;
  --accent-cyan: #10b981;
  --accent-purple: #065f46;
  --accent-gradient: linear-gradient(135deg, #059669 0%, #10b981 100%);
  --purple-gradient: linear-gradient(135deg, #065f46 0%, #059669 100%);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.15);
  --glow-1: rgba(16, 185, 129, 0.07);
  --glow-2: rgba(5, 150, 105, 0.06);
}

/* Cyberpunk Neon Theme */
body[data-theme="cyberpunk"] {
  --bg-primary: #09030c;
  --bg-secondary: #160720;
  --bg-card: rgba(26, 8, 38, 0.65);
  --bg-card-hover: rgba(38, 12, 56, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(217, 70, 239, 0.4);
  --text-primary: #fdf2f8;
  --text-secondary: #f472b6;
  --text-muted: #d946ef;
  --accent-blue: #c026d3;
  --accent-cyan: #06b6d4;
  --accent-purple: #701a75;
  --accent-gradient: linear-gradient(135deg, #d946ef 0%, #06b6d4 100%);
  --purple-gradient: linear-gradient(135deg, #701a75 0%, #d946ef 100%);
  --shadow-glow: 0 0 20px rgba(217, 70, 239, 0.2);
  --glow-1: rgba(217, 70, 239, 0.08);
  --glow-2: rgba(6, 182, 212, 0.06);
}

/* Light Theme */
body[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-active: rgba(2, 132, 199, 0.4);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #0284c7;
  --accent-blue: #0284c7;
  --accent-cyan: #0ea5e9;
  --accent-purple: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  --purple-gradient: linear-gradient(135deg, #4f46e5 0%, #0284c7 100%);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.15);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
  --glow-1: rgba(14, 165, 233, 0.04);
  --glow-2: rgba(79, 70, 229, 0.03);
}

/* --- Base Resets & Typography --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Ambient glow blobs */
body::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 20%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--glow-1) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  transition: background var(--transition-normal);
}

body::after {
  content: '';
  position: absolute;
  top: 45%;
  right: -10%;
  width: 40vw;
  height: 40vw;
  background: radial-gradient(circle, var(--glow-2) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  transition: background var(--transition-normal);
}

h1, h2, h3, h4 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* --- Scrollbar Customization --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* --- Utilities --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

/* --- Header & Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(6, 9, 19, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(6, 9, 19, 0.9);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.logo-photo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--accent-cyan);
  box-shadow: 0 0 8px rgba(0, 245, 212, 0.2);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

/* --- Theme Switcher Dropdown --- */
.theme-switcher {
  position: relative;
  display: inline-block;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-active);
}

.theme-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  width: 180px;
  box-shadow: var(--shadow-md);
  padding: 8px;
  z-index: 1001;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-direction: column;
  gap: 4px;
}

.theme-dropdown.show {
  display: flex;
  animation: fadeIn 0.2s ease forwards;
}

.theme-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 8px 12px;
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: left;
  transition: all var(--transition-fast);
}

.theme-opt:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.theme-opt.active {
  background: rgba(0, 229, 255, 0.08);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Theme dots */
.theme-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-obsidian { background: #00f5d4; }
.dot-mint { background: #10b981; }
.dot-cyberpunk { background: #d946ef; }
.dot-light { background: #0284c7; }

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-normal);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--text-primary);
}

/* --- Hero Section --- */
.hero-section {
  padding: 160px 0 100px 0;
  position: relative;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 245, 212, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.2);
  color: var(--accent-cyan);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #060913;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

/* Card Badge/Glow effect on right */
.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-card {
  width: 320px;
  height: 380px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(
    transparent,
    rgba(0, 245, 212, 0.3),
    transparent 30%
  );
  animation: rotateGlow 8s linear infinite;
  z-index: 1;
  pointer-events: none;
}

.hero-card-inner {
  position: relative;
  z-index: 2;
  background: var(--bg-primary);
  border-radius: 14px;
  width: 100%;
  height: 100%;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--border-color);
}

.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.hero-card-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: #060913;
}

.hero-avatar-img {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 245, 212, 0.3);
}

.hero-card-experience {
  background: rgba(255, 255, 255, 0.05);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  text-align: center;
}

.hero-card-exp-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.1;
}

.hero-card-exp-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@keyframes rotateGlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* --- Section Global Styling --- */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px auto;
}

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-secondary);
}

/* --- Professional Experience Timeline --- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-blue) 0%, var(--accent-purple) 50%, rgba(255,255,255,0.05) 100%);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 48px;
}

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

.timeline-dot {
  position: absolute;
  left: 11px;
  top: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 4px solid var(--accent-blue);
  box-shadow: 0 0 10px rgba(0, 114, 255, 0.4);
  transition: all var(--transition-normal);
  z-index: 2;
}

.timeline-item:hover .timeline-dot {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 245, 212, 0.7);
  transform: scale(1.2);
}

.timeline-content {
  padding: 28px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateY(-2px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-md);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.company-info h3 {
  font-size: 1.35rem;
  margin-bottom: 4px;
}

.company-info .role-title {
  color: var(--accent-cyan);
  font-weight: 500;
  font-size: 1.05rem;
}

.timeline-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
}

.timeline-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
}

.timeline-item.active .timeline-body {
  max-height: 1000px;
  transition: max-height 0.8s cubic-bezier(1, 0, 1, 0); /* smooth dynamic accordion */
  margin-top: 16px;
}

.timeline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.timeline-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-cyan);
}

.timeline-toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
}

.timeline-toggle-btn svg {
  transition: transform var(--transition-normal);
}

.timeline-item.active .timeline-toggle-btn svg {
  transform: rotate(180deg);
}

/* --- Technical Skills Section --- */
.skills-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.skills-tab-btn {
  padding: 10px 24px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-normal);
  background: rgba(255, 255, 255, 0.02);
}

.skills-tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.skills-tab-btn.active {
  background: var(--accent-cyan);
  color: #060913;
  border-color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(0, 245, 212, 0.3);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.skills-card {
  padding: 24px;
}

.skills-card h3 {
  font-size: 1.15rem;
  margin-bottom: 16px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* --- Certifications --- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.cert-card {
  padding: 28px;
  display: flex;
  gap: 20px;
  align-items: center;
}

.cert-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: rgba(0, 114, 255, 0.1);
  border: 1px solid rgba(0, 114, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  font-size: 1.5rem;
}

.cert-card.ai-cert .cert-icon {
  background: rgba(123, 44, 191, 0.1);
  border-color: rgba(123, 44, 191, 0.2);
  color: #a855f7;
}

.cert-info h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.cert-info p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.cert-id {
  font-family: monospace;
  background: rgba(0,0,0,0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-muted);
}

/* --- Interactive HLD & Projects Hub --- */
.projects-showcase-container {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 32px;
  margin-top: 20px;
  align-items: stretch;
}

.projects-menu {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-menu-item {
  padding: 24px;
  text-align: left;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(17, 25, 46, 0.3);
  transition: all var(--transition-normal);
}

.project-menu-item:hover {
  background: rgba(17, 25, 46, 0.6);
  border-color: var(--text-muted);
}

.project-menu-item.active {
  background: var(--bg-card);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-sm), var(--shadow-glow);
}

.project-menu-item h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.project-menu-item .project-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.project-menu-item.active h3 {
  color: var(--accent-cyan);
}

.project-details-view {
  min-height: 500px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.project-details-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.project-details-title h2 {
  font-size: 2.2rem;
  margin-bottom: 6px;
}

.project-details-subtitle {
  color: var(--accent-cyan);
  font-weight: 500;
}

.project-details-meta {
  text-align: right;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.project-details-meta span {
  display: block;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.project-tech-chip {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.project-summary-box p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.project-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  gap: 24px;
}

.project-tab-btn {
  padding: 12px 4px;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.project-tab-btn:hover {
  color: var(--text-primary);
}

.project-tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.project-tab-content {
  display: none;
}

.project-tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease forwards;
}

/* HLD Section Styling */
.hld-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: stretch;
}

.hld-graph-wrapper {
  background: rgba(6, 9, 19, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  min-height: 380px;
  position: relative;
}

/* Mermaid customization overrides */
.hld-graph-wrapper svg {
  max-width: 100%;
  height: auto;
}

.component-explorer {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.explorer-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.explorer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 340px;
  overflow-y: auto;
  padding-right: 8px;
}

.explorer-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.explorer-item:hover {
  background: rgba(0, 229, 255, 0.05);
  border-color: var(--border-active);
}

.explorer-item-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.explorer-item-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Achievements Tab */
.achievements-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.achievement-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(255,255,255,0.02);
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.achievement-icon {
  font-size: 1.2rem;
  color: var(--accent-cyan);
}

.achievement-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Contact & Footer --- */
.contact-section {
  padding: 120px 0;
  background: radial-gradient(circle at bottom, rgba(0, 114, 255, 0.05) 0%, transparent 60%);
}

.contact-card {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.contact-title {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.contact-subtitle {
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
}

.contact-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.contact-method:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  background: rgba(0, 229, 255, 0.03);
}

.contact-method-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0, 245, 212, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.3rem;
  transition: transform var(--transition-normal);
}

.contact-method:hover .contact-method-icon {
  transform: scale(1.1);
}

.contact-method-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.contact-method-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  .projects-showcase-container {
    grid-template-columns: 1fr;
  }
  
  .projects-menu {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  
  .project-menu-item {
    flex: 0 0 280px;
    padding: 16px;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* simple burger menu / hide for simplicity or implement burger if needed */
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2.4rem;
  }
  
  .hld-container {
    grid-template-columns: 1fr;
  }
  
  .project-details-view {
    padding: 24px;
  }
  
  .contact-card {
    padding: 32px 20px;
  }
  
  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .timeline-period {
    align-self: flex-start;
  }
}