/* ==========================================================================
   PRADEEP BALAMURUGAN - NETWORK ENGINEER PORTFOLIO
   Technical, Modern, Recruiter-Friendly Stylesheet
   Pure CSS3 - Zero External Frameworks
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Deep Network Infrastructure Theme */
  --bg-primary: #080c14;
  --bg-secondary: #0d1424;
  --bg-card: #121a2d;
  --bg-card-hover: #18223a;
  --bg-input: #090e1a;
  
  --border-subtle: #1e293b;
  --border-focus: #0ea5e9;
  --border-glow: rgba(14, 165, 233, 0.25);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-highlight: #38bdf8;

  /* Network Accents */
  --accent-cyan: #0ea5e9;
  --accent-cyan-hover: #38bdf8;
  --accent-cyan-subtle: rgba(14, 165, 233, 0.12);
  
  --accent-emerald: #10b981;
  --accent-emerald-subtle: rgba(16, 185, 129, 0.12);
  
  --accent-violet: #6366f1;
  --accent-violet-subtle: rgba(99, 102, 241, 0.12);

  --accent-amber: #f59e0b;
  --accent-amber-subtle: rgba(245, 158, 11, 0.12);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Consolas", "Fira Code", "Courier New", monospace;

  /* Spacing */
  --container-max-w: 1200px;
  --nav-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;

  /* Shadows */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 10px 30px rgba(14, 165, 233, 0.12);
  --shadow-glow: 0 0 15px rgba(14, 165, 233, 0.35);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* Background Network Canvas */
#network-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
}

/* Focus outlines for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

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

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

ul {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   3. Layout & Containers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section-padding {
  padding-top: 96px;
  padding-bottom: 96px;
}

.bg-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   4. Section Headers & Terminal Accents
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: 48px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  display: inline-block;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-emerald));
  margin-top: 14px;
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 720px;
  margin-top: 16px;
  line-height: 1.6;
}

.text-gradient {
  background: linear-gradient(135deg, #38bdf8 0%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   5. Sticky Navigation & Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background-color: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 41, 59, 0.7);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(8, 12, 20, 0.96);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header-container {
  max-width: var(--container-max-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  font-size: 1.25rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

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

.brand-name {
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-domain {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 4px;
  padding: 2px 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.status-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  margin-left: 6px;
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Nav Menu Links */
.navbar {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color var(--transition-fast);
}

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

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-cyan);
  transition: width var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-outline-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  background-color: transparent;
  transition: all var(--transition-fast);
}

.btn-outline-header:hover {
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan-hover);
  border-color: var(--accent-cyan-hover);
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.2);
}

/* Hamburger button for mobile */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-sm);
  background: transparent;
  z-index: 1001;
}

.hamburger-btn .bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.hamburger-btn.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   6. Button Styles
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: 1px solid #38bdf8;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-tertiary {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn-tertiary:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: #0077b5;
  color: #38bdf8;
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   7. Generic Technical Cards & Badges
   -------------------------------------------------------------------------- */
.tech-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.4), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.tech-card:hover {
  border-color: rgba(14, 165, 233, 0.35);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

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

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.badge-accent {
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.badge-success {
  background-color: var(--accent-emerald-subtle);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-neutral {
  background-color: rgba(148, 163, 184, 0.1);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.skill-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #e2e8f0;
  background-color: #0c1322;
  border: 1px solid #1e293b;
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.skill-badge:hover {
  background-color: var(--accent-cyan-subtle);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan-hover);
  transform: translateY(-1px);
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* --------------------------------------------------------------------------
   8. Section 1: Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 60px;
  padding-bottom: 80px;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.terminal-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background-color: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 999px;
  margin-bottom: 20px;
}

.terminal-badge .status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

.terminal-badge .badge-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-emerald);
  letter-spacing: 0.05em;
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.hero-intro {
  font-size: 1.12rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.hero-statement {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 32px;
}

.hero-statement strong {
  color: var(--text-primary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-tech-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.tech-strip-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background-color: rgba(255, 255, 255, 0.03);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.tech-strip-item .terminal-prefix {
  color: var(--accent-cyan);
}

/* Profile Photo Card in Hero */
.hero-media {
  display: flex;
  justify-content: center;
}

.profile-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.profile-card:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 165, 233, 0.4);
}

.profile-card-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background-color: #0b1120;
  border-bottom: 1px solid var(--border-subtle);
}

.profile-card-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.profile-card-header .dot.red { background-color: #ef4444; }
.profile-card-header .dot.yellow { background-color: #f59e0b; }
.profile-card-header .dot.green { background-color: #10b981; }

.profile-card-header .card-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

.profile-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #0b1120;
  overflow: hidden;
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.profile-card:hover .profile-photo {
  transform: scale(1.03);
}

.network-badge-overlay {
  position: absolute;
  bottom: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(16, 185, 129, 0.4);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: #f8fafc;
}

.badge-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

.profile-meta-footer {
  padding: 16px 20px;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

.meta-label {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.meta-val {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
}

/* --------------------------------------------------------------------------
   9. Section 2: About Me
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: start;
}

.about-narrative {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-narrative .lead-text {
  font-size: 1.15rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.about-narrative p {
  color: var(--text-secondary);
  line-height: 1.75;
}

.about-narrative strong {
  color: #f1f5f9;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.about-card {
  padding: 22px;
}

.card-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.card-icon svg {
  width: 20px;
  height: 20px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   10. Section 3: Career Goal
   -------------------------------------------------------------------------- */
.goal-highlight-box {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08) 0%, rgba(16, 185, 129, 0.05) 100%);
  border: 1px solid rgba(14, 165, 233, 0.25);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 40px;
}

.goal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
}

.goal-statement {
  font-size: 1.22rem;
  line-height: 1.65;
  color: var(--text-primary);
}

.goal-statement strong {
  color: var(--accent-cyan-hover);
}

.target-roles-heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.roles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.role-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.role-card:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 165, 233, 0.35);
  box-shadow: var(--shadow-card-hover);
}

.role-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.role-icon svg {
  width: 22px;
  height: 22px;
}

.role-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.role-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 18px;
  flex-grow: 1;
}

.role-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.role-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background-color: rgba(14, 165, 233, 0.08);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

/* --------------------------------------------------------------------------
   11. Section 4: Education & Section 6: Experience Timeline
   -------------------------------------------------------------------------- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
  margin-left: 10px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 8px;
  width: 2px;
  background-color: var(--border-subtle);
}

.timeline-item {
  display: flex;
  gap: 24px;
  position: relative;
}

.timeline-marker {
  position: relative;
  z-index: 2;
  margin-top: 18px;
}

.marker-dot {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.4);
}

.marker-dot.active-dot {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.timeline-content {
  flex: 1;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}

.degree-title,
.experience-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 6px;
  line-height: 1.3;
}

.institution-name,
.company-name {
  font-size: 1rem;
  color: var(--accent-cyan);
  font-weight: 500;
}

.time-location {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.time-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 10px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  white-space: nowrap;
}

.location-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.grade-pill {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  background-color: rgba(14, 165, 233, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(14, 165, 233, 0.2);
  margin-bottom: 12px;
}

.pill-label {
  color: var(--text-secondary);
}

.pill-value {
  color: var(--accent-cyan);
  font-weight: bold;
}

.item-summary,
.exp-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.exp-highlights {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.highlight-item {
  display: flex;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.highlight-bullet {
  color: var(--accent-cyan);
  font-size: 1.1rem;
  line-height: 1;
}

.exp-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   12. Section 5: Networking Training Section
   -------------------------------------------------------------------------- */
.training-overview-card {
  padding: 34px;
}

.training-org-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 18px;
}

.training-program-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 6px;
}

.training-institute {
  font-size: 1.1rem;
  color: var(--accent-cyan);
  font-weight: 500;
}

.training-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.training-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 900px;
}

.curriculum-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.curriculum-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.curriculum-group {
  background-color: #0c1220;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.group-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   13. Section 6: Skills Section
   -------------------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-card {
  display: flex;
  flex-direction: column;
}

.skill-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.skill-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.skill-icon svg {
  width: 20px;
  height: 20px;
}

.skill-category-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.category-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   14. Section 7: Projects & Networking Labs
   -------------------------------------------------------------------------- */
.projects-container {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.project-card {
  padding: 36px;
}

.project-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: start;
}

.project-badge-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.project-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.project-lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.project-block {
  margin-bottom: 22px;
}

.block-subtitle {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.feature-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-size: 1rem;
}

.feature-list li strong {
  color: var(--text-primary);
}

.contribution-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  background-color: #0b1120;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-emerald);
}

/* Project Visual Media & Conceptual Diagrams */
.project-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-img-frame {
  position: relative;
  background-color: #080d1a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.project-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.project-card:hover .project-img {
  transform: scale(1.02);
}

.img-caption-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background-color: #0b1120;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.img-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
}

/* Conceptual Diagram Container */
.conceptual-diagram-card {
  background-color: #080d1a;
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-md);
  padding: 16px;
}

.diagram-header {
  margin-bottom: 12px;
}

.diagram-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
}

.svg-diagram-wrapper {
  width: 100%;
  background-color: #0b1120;
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.topology-svg {
  width: 100%;
  height: auto;
  max-height: 240px;
}

.svg-node {
  transition: transform 0.2s ease;
  cursor: pointer;
}

.svg-node:hover {
  transform: scale(1.04);
}

.diagram-footer-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 8px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   15. Section 8: Certifications
   -------------------------------------------------------------------------- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  padding: 0;
  display: flex;
  flex-direction: column;
}

.cert-img-container {
  width: 100%;
  height: 180px;
  background-color: #090e1a;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

.cert-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.cert-card:hover .cert-img {
  transform: scale(1.04);
}

.cert-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.cert-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 10px;
  margin-bottom: 4px;
}

.cert-issuer {
  font-size: 0.88rem;
  color: var(--accent-cyan);
  font-weight: 500;
  margin-bottom: 12px;
}

.cert-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   16. Section 9: Resume Section
   -------------------------------------------------------------------------- */
.resume-cta-box {
  padding: 48px;
  background: radial-gradient(circle at top right, rgba(14, 165, 233, 0.08), transparent 70%), var(--bg-card);
}

.resume-cta-content {
  max-width: 800px;
}

.resume-cta-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 16px;
  margin-bottom: 14px;
  line-height: 1.25;
}

.resume-cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.resume-highlights-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.resume-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background-color: #0b1120;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--text-primary);
}

.resume-pill svg {
  width: 18px;
  height: 18px;
  color: var(--accent-emerald);
  flex-shrink: 0;
}

.resume-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.resume-path-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.resume-path-hint code {
  color: var(--accent-cyan);
  background-color: #080d1a;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   17. Section 10: Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 36px;
  align-items: start;
}

.contact-info-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--accent-cyan-subtle);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-details {
  display: flex;
  flex-direction: column;
}

.contact-type {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-val {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.contact-card:hover .contact-val {
  color: var(--accent-cyan);
}

/* Contact Form */
.contact-form-container {
  padding: 36px;
  position: relative;
}

.form-header {
  margin-bottom: 24px;
}

.form-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 4px;
}

.form-note {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.inline-link {
  color: var(--accent-cyan);
  text-decoration: underline;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-label .required {
  color: #ef4444;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
  outline: none;
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

.field-error {
  display: none;
  font-size: 0.78rem;
  color: #ef4444;
  margin-top: 4px;
  font-family: var(--font-mono);
}

.field-error.active {
  display: block;
}

.form-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background-color: rgba(14, 165, 233, 0.05);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 22px;
}

.form-disclaimer .info-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 2px;
}

.btn-submit {
  width: 100%;
  padding: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Honeypot hidden */
.form-group-hp {
  display: none !important;
}

/* Resend Submission Feedback Banner */
.form-status {
  display: none;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 500;
  margin-top: 16px;
  text-align: center;
  line-height: 1.5;
  animation: fadeIn 0.3s ease;
}

.form-status.success {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(16, 185, 129, 0.12);
  border: 1px solid var(--accent-emerald);
  color: #34d399;
}

.form-status.error {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(239, 68, 68, 0.12);
  border: 1px solid #ef4444;
  color: #f87171;
}

/* Feedback Box */
.form-feedback {
  background-color: #0b1424;
  border: 1px solid var(--accent-emerald);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  margin-top: 16px;
  animation: fadeIn 0.3s ease;
}

.form-feedback.hidden {
  display: none;
}

.feedback-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--accent-emerald-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px auto;
}

.feedback-icon-box svg {
  width: 26px;
  height: 26px;
}

.feedback-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feedback-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
}

.feedback-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   18. Section 11: Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #05080e;
  border-top: 1px solid var(--border-subtle);
  padding-top: 60px;
  padding-bottom: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .brand-logo {
  margin-bottom: 10px;
}

.footer-role {
  color: var(--accent-cyan);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.footer-location {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.geo-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-cyan);
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.domain-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   19. Scroll to Top Floating Button
   -------------------------------------------------------------------------- */
.scroll-to-top-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-normal);
  z-index: 999;
}

.scroll-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-to-top-btn:hover {
  background-color: var(--accent-cyan);
  color: #ffffff;
  box-shadow: 0 0 16px var(--accent-cyan);
  transform: translateY(-2px);
}

.scroll-to-top-btn svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   20. Scroll Reveal & Load Animations
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll reveal helper class */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   21. Responsive Styles & Breakpoints
   -------------------------------------------------------------------------- */

/* Large Tablets & Small Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: left;
  }

  .hero-media {
    justify-content: flex-start;
  }

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

  .roles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .certifications-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

/* Mobile & Small Tablets (<= 768px) */
@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section-padding {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-name {
    font-size: 2.5rem;
  }

  .hero-title {
    font-size: 1.25rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

  /* Hamburger Menu Activation */
  .hamburger-btn {
    display: flex;
  }

  .nav-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 998;
  }

  .nav-backdrop.active {
    display: block;
  }

  .navbar {
    position: fixed;
    top: var(--nav-height);
    right: 0;
    width: 280px;
    height: calc(100vh - var(--nav-height));
    background-color: #0b1120;
    border-left: 1px solid var(--border-subtle);
    padding: 24px;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.6);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    align-items: flex-start;
    overflow-y: auto;
  }

  .navbar.open {
    transform: translateX(0);
  }

  .nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    width: 100%;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 8px 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

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

  .curriculum-groups {
    grid-template-columns: 1fr;
  }

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

  .resume-highlights-row {
    grid-template-columns: 1fr;
  }

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

  .time-location {
    text-align: left;
    align-items: flex-start;
  }

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

  .training-meta {
    text-align: left;
    align-items: flex-start;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Extra Small Phones (<= 480px) */
@media (max-width: 480px) {
  .hero-name {
    font-size: 2.1rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .resume-btn-row {
    flex-direction: column;
    width: 100%;
  }

  .resume-btn-row .btn {
    width: 100%;
  }

  .tech-card {
    padding: 20px;
  }

  .project-card {
    padding: 20px;
  }

  .contact-form-container {
    padding: 20px;
  }
}