/* ==========================================================================
   PORTFOLIO STYLESHEET - JEFFERSON MONTEIRO
   Senior Java Backend Developer & Solutions Architect
   Design: Modern Dark Navy with Electric Cyan & Sapphire Blue Accents
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Deep Navy & Midnight */
  --bg-darkest: #050814;
  --bg-primary: #080e1e;
  --bg-secondary: #0e172e;
  --bg-card: rgba(16, 26, 52, 0.75);
  --bg-card-hover: rgba(22, 36, 71, 0.85);
  --bg-glass: rgba(14, 23, 46, 0.85);
  --bg-glass-card: rgba(255, 255, 255, 0.03);

  /* Accents - Electric Cyan & Sapphire */
  --accent-cyan: #00e5ff;
  --accent-cyan-glow: rgba(0, 229, 255, 0.25);
  --accent-blue: #38bdf8;
  --accent-sapphire: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #00e5ff 0%, #3b82f6 50%, #6366f1 100%);
  --grad-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.12) 0%, transparent 70%);

  /* Borders & Dividers */
  --border-subtle: rgba(56, 189, 248, 0.14);
  --border-hover: rgba(0, 229, 255, 0.45);
  --border-card: rgba(255, 255, 255, 0.08);

  /* Text & Content */
  --text-pure: #ffffff;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

  /* Spacing & Layout */
  --container-max: 1200px;
  --nav-height: 76px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  /* 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: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 25px rgba(0, 229, 255, 0.2);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  font-size: 16px;
  color-scheme: dark;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-darkest);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
  background-image: 
    radial-gradient(at 10% 10%, rgba(3, 105, 161, 0.15) 0px, transparent 50%),
    radial-gradient(at 90% 20%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 50% 80%, rgba(14, 165, 233, 0.1) 0px, transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button, input, textarea {
  font-family: inherit;
  color: inherit;
  border: none;
  outline: none;
}

ul {
  list-style: none;
}

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

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. Layout & Container
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  box-sizing: border-box;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-pure);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
  word-break: break-word;
}

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

.section-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation Bar
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  max-width: 100vw;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(8, 14, 30, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.header.scrolled {
  background: rgba(5, 8, 20, 0.94);
  box-shadow: var(--shadow-md);
  border-bottom-color: rgba(56, 189, 248, 0.25);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
}

/* Brand Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-pure);
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
}

.brand-text {
  letter-spacing: -0.01em;
}

.brand-title-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 6px;
  font-weight: 500;
}

/* Desktop Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-pure);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

/* Hamburger Button */
.hamburger {
  display: none;
  background: rgba(255, 255, 255, 0.03);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.hamburger:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.hamburger-line {
  width: 22px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: var(--transition-fast);
}

.hamburger-line::before,
.hamburger-line::after {
  content: '';
  position: absolute;
  width: 22px;
  height: 2px;
  background: currentColor;
  left: 0;
  transition: var(--transition-fast);
}

.hamburger-line::before { top: -7px; }
.hamburger-line::after { bottom: -7px; }

.hamburger.open .hamburger-line {
  background: transparent;
}

.hamburger.open .hamburger-line::before {
  top: 0;
  transform: rotate(45deg);
}

.hamburger.open .hamburger-line::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. Buttons & Interactive Elements
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-sapphire);
  background-image: linear-gradient(135deg, #00b4d8 0%, #3b82f6 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.45);
  background-image: linear-gradient(135deg, #00e5ff 0%, #2563eb 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

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

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
  width: 100%;
}

.hero-content {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.hero-location-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.25);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  flex-wrap: wrap;
  max-width: 100%;
}

.location-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulseDot 2s infinite;
  flex-shrink: 0;
}

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

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-pure);
  margin-bottom: 20px;
  word-break: break-word;
}

.hero-title .title-accent {
  display: block;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-top: 6px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 620px;
}

.hero-subtitle strong {
  color: var(--text-pure);
  font-weight: 600;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 500;
  transition: var(--transition-fast);
}

.hero-badge-pill:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: rgba(0, 229, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0, 229, 255, 0.25);
}

.social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Hero Terminal Visual */
.hero-visual {
  position: relative;
  width: 100%;
  min-width: 0;
}

.terminal-card {
  background: #090e1e;
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 229, 255, 0.15);
  overflow: hidden;
  transition: transform var(--transition-normal);
  width: 100%;
  max-width: 100%;
}

.terminal-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.4);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
  gap: 8px;
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

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

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.terminal-body {
  padding: 22px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.65;
  color: #e2e8f0;
  overflow-x: auto;
  word-break: break-word;
}

.code-key { color: #38bdf8; }
.code-val { color: #34d399; }
.code-num { color: #f59e0b; }
.code-arr { color: #fb7185; }
.code-comment { color: #64748b; font-style: italic; }

.terminal-highlight-box {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(0, 229, 255, 0.05);
  border-left: 3px solid var(--accent-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. About Me Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  min-width: 0;
}

.about-text p {
  margin-bottom: 20px;
}

.about-text strong {
  color: var(--text-pure);
}

.international-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 20px 16px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-fast);
  min-width: 0;
}

.pillar-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

.pillar-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.pillar-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-pure);
  margin-bottom: 6px;
}

.pillar-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  width: 100%;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast);
  min-width: 0;
}

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

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad-primary);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-pure);
  line-height: 1;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   8. Technical Skills Section
   -------------------------------------------------------------------------- */
.skills-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-pure);
}

.filter-btn.active {
  background: var(--accent-cyan);
  color: var(--bg-darkest);
  border-color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.35);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  width: 100%;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition-normal);
  position: relative;
  backdrop-filter: blur(8px);
  min-width: 0;
}

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

.category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.category-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.category-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
  word-break: break-word;
}

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

.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
}

.skill-pill.featured {
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.3);
  color: var(--accent-cyan);
  font-weight: 600;
}

.skill-pill:hover {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--text-pure);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   9. Featured Projects Section
   -------------------------------------------------------------------------- */
.projects-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.project-filter-btn {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.project-filter-btn:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-pure);
}

.project-filter-btn.active {
  background: var(--accent-cyan);
  color: var(--bg-darkest);
  border-color: var(--accent-cyan);
  font-weight: 600;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  width: 100%;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  min-width: 0;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 25px rgba(0, 229, 255, 0.15);
  background: var(--bg-card-hover);
}

.project-header-bar {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.project-org {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.project-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 12px;
  line-height: 1.3;
  word-break: break-word;
}

.project-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
}

.project-highlights {
  margin-bottom: 24px;
  flex: 1;
}

.project-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.project-highlight-item::before {
  content: '▹';
  color: var(--accent-cyan);
  font-weight: bold;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--accent-blue);
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.15);
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.project-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
  transition: all var(--transition-fast);
}

.project-link-btn:hover {
  background: var(--accent-cyan);
  color: var(--bg-darkest);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
}

/* --------------------------------------------------------------------------
   10. Professional Experience Section (Timeline)
   -------------------------------------------------------------------------- */
.timeline-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.timeline-container::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 20px;
  left: 24px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-cyan) 0%, rgba(56, 189, 248, 0.3) 70%, transparent 100%);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  margin-bottom: 44px;
  min-width: 0;
}

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

.timeline-node {
  position: absolute;
  left: 15px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-darkest);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  z-index: 2;
  transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-node {
  transform: scale(1.25);
  background: var(--accent-cyan);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition-fast);
  min-width: 0;
}

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

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

.timeline-role {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-pure);
  word-break: break-word;
}

.timeline-company {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.timeline-location {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.timeline-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 12px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-full);
}

.timeline-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.timeline-responsibilities {
  margin: 16px 0;
  padding-left: 18px;
}

.timeline-responsibilities li {
  list-style-type: disc;
  margin-bottom: 8px;
}

.timeline-subprojects {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--accent-cyan);
}

.timeline-subproject-title {
  font-weight: 600;
  color: var(--text-pure);
  font-size: 0.92rem;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   11. Education & Certifications
   -------------------------------------------------------------------------- */
.edu-cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
}

.credentials-column-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.credential-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 20px;
  transition: all var(--transition-fast);
  display: flex;
  gap: 18px;
  min-width: 0;
}

.credential-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.credential-icon-box {
  width: 50px;
  height: 50px;
  min-width: 50px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.4rem;
  flex-shrink: 0;
}

.credential-info {
  flex: 1;
  min-width: 0;
}

.credential-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 4px;
  word-break: break-word;
}

.credential-issuer {
  font-size: 0.9rem;
  color: var(--accent-cyan);
  font-weight: 500;
  margin-bottom: 6px;
}

.credential-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-top: 6px;
}

/* --------------------------------------------------------------------------
   12. Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  width: 100%;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: 100%;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-fast);
  min-width: 0;
}

.contact-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.contact-icon-box {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

.contact-details {
  flex: 1;
  min-width: 0;
}

.contact-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.contact-val {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-pure);
  word-break: break-all;
}

.contact-copy-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.contact-copy-btn:hover {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--text-pure);
}

/* Contact Message Form Card */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  width: 100%;
  min-width: 0;
}

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

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(5, 8, 20, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-pure);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
  background: rgba(5, 8, 20, 0.85);
}

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

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: #0e172e;
  border: 1px solid var(--accent-cyan);
  color: var(--text-pure);
  padding: 14px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 229, 255, 0.3);
  font-size: 0.92rem;
  font-weight: 500;
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(100px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* --------------------------------------------------------------------------
   13. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: #04060e;
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 30px;
  width: 100%;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 30px;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-pure);
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  left: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(14, 23, 46, 0.8);
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-cyan);
  color: var(--bg-darkest);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
  transform: translateY(-3px);
}

/* --------------------------------------------------------------------------
   14. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-visual {
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .edu-cert-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .section {
    padding: 60px 0;
  }

  /* Header & Navigation on Mobile */
  .brand {
    font-size: 1.05rem;
    gap: 8px;
  }

  .brand-badge {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

  .brand-title-badge {
    display: none;
  }

  .hamburger {
    display: flex;
    flex-shrink: 0;
    margin-left: auto;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(8, 14, 30, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: stretch;
    padding: 20px 24px;
    gap: 12px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

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

  .nav-link {
    font-size: 1.05rem;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-actions {
    display: none;
  }

  /* Hero Section on Mobile */
  .hero-section {
    padding-top: calc(var(--nav-height) + 25px);
    padding-bottom: 50px;
  }

  .hero-location-badge {
    font-size: 0.76rem;
    padding: 5px 12px;
    line-height: 1.4;
  }

  .hero-title {
    font-size: 2.15rem;
    letter-spacing: -0.02em;
  }

  .hero-subtitle {
    font-size: 0.98rem;
    line-height: 1.6;
    margin-bottom: 24px;
  }

  .hero-badges {
    gap: 8px;
    margin-bottom: 24px;
  }

  .hero-badge-pill {
    font-size: 0.78rem;
    padding: 5px 10px;
  }

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

  .international-pillars {
    grid-template-columns: 1fr;
  }

  .timeline-container::before {
    left: 14px;
  }

  .timeline-item {
    padding-left: 40px;
  }

  .timeline-node {
    left: 5px;
    width: 18px;
    height: 18px;
  }

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

  .timeline-badge {
    margin-top: 6px;
  }

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

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

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .hero-subtitle {
    font-size: 0.92rem;
  }

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

  .stat-card {
    padding: 20px;
  }

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

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

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

  .contact-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .contact-copy-btn {
    width: 100%;
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   15. Print Optimization (Clean Resume Export)
   -------------------------------------------------------------------------- */
@media print {
  body {
    background: #ffffff !important;
    color: #111827 !important;
  }

  .header, .hero-cta, .hero-visual, .hamburger, .back-to-top, .toast, .projects-filter, .skills-filter, .contact-form-card, .footer {
    display: none !important;
  }

  .section {
    padding: 20px 0 !important;
  }

  .hero-section {
    min-height: auto !important;
    padding: 0 !important;
  }

  .hero-title, .section-title, .timeline-role, .credential-title {
    color: #000000 !important;
  }

  .timeline-card, .skill-category-card, .credential-card {
    border: 1px solid #e5e7eb !important;
    background: #ffffff !important;
    box-shadow: none !important;
    page-break-inside: avoid;
  }
}