/**
 * ChipSimpson.Tech - Modern Portfolio & Landing Page Stylesheet
 * High-Performance, Zero-Dependency CSS Architecture
 */

/* ==========================================================================
   1. CSS Custom Properties & Design Tokens
   ========================================================================== */
:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-body: #0a0f1d;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(51, 65, 85, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.8);
  --border-color: rgba(148, 163, 184, 0.15);
  --border-color-hover: rgba(56, 189, 248, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Brand Accents */
  --color-primary-50: #f0f9ff;
  --color-primary-100: #e0f2fe;
  --color-primary-400: #38bdf8;
  --color-primary-500: #0ea5e9;
  --color-primary-600: #0284c7;
  --color-primary-glow: rgba(14, 165, 233, 0.25);

  --color-accent: #818cf8;
  --color-accent-glow: rgba(129, 140, 248, 0.2);
  --color-emerald: #10b981;
  --color-amber: #f59e0b;
  --color-rose: #f43f5e;

  /* Terminal Specifics */
  --term-bg: #070b14;
  --term-header-bg: #0f172a;
  --term-text: #e2e8f0;

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

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px var(--color-primary-glow);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1200px;
  --header-height: 4.25rem;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: rgba(100, 116, 139, 0.2);
  --border-color-hover: rgba(14, 165, 233, 0.6);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;

  --color-primary-400: #0284c7;
  --color-primary-500: #0369a1;
  --color-primary-600: #075985;
  --color-primary-glow: rgba(14, 165, 233, 0.15);

  --term-bg: #0f172a;
  --term-header-bg: #1e293b;
  --term-text: #e2e8f0;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.18);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1.5rem);
  font-size: 16px;
}

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Background Ambient Lighting Grid */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(at 10% 20%, rgba(14, 165, 233, 0.08) 0px, transparent 50%),
    radial-gradient(at 90% 80%, rgba(129, 140, 248, 0.06) 0px, transparent 50%),
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  pointer-events: none;
  z-index: -1;
}

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

a {
  color: var(--color-primary-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-500);
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Section Header Typography */
.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--spacing-2xl) auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-400);
  background: rgba(14, 165, 233, 0.1);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(14, 165, 233, 0.25);
  margin-bottom: 0.875rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-title .gradient-text {
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   3. Header & Navigation Bar
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-logo svg {
  width: 28px;
  height: 28px;
}

.brand-cursor {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--color-primary-400);
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary-400);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary-400);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: rgba(14, 165, 233, 0.15);
  border-color: var(--color-primary-400);
  color: var(--color-primary-400);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  color: #ffffff;
  box-shadow: 0 4px 14px var(--color-primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: rgba(148, 163, 184, 0.2);
  border-color: var(--color-primary-400);
  color: var(--color-primary-400);
  transform: translateY(-1px);
}

.btn-sm {
  font-size: 0.8125rem;
  padding: 0.45rem 0.9rem;
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

/* ==========================================================================
   4. Hero Section
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + var(--spacing-2xl));
  padding-bottom: var(--spacing-3xl);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 9px;
  height: 9px;
  background: var(--color-emerald);
  border-radius: 50%;
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  background: var(--color-emerald);
  opacity: 0.6;
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.8; }
  100% { transform: scale(2.2); opacity: 0; }
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.hero-description {
  font-size: 1.1875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.75rem;
}

/* Stat Counter Strip */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--color-primary-400);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 0.2rem;
}

/* Hero Visual Box */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.avatar-wrapper {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-color);
  background: var(--bg-surface-elevated);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.floating-badge {
  position: absolute;
  bottom: -12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color-hover);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

/* ==========================================================================
   5. About & IT-to-Dev Journey Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.about-story-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.about-story-text p:last-child {
  margin-bottom: 0;
}

.advantages-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  height: 100%;
}

.advantage-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all var(--transition-base);
}

.advantage-item:hover {
  border-color: var(--border-color-hover);
  background: rgba(14, 165, 233, 0.05);
  transform: translateY(-2px);
}

.advantage-icon {
  font-size: 1.75rem;
}

.advantage-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.advantage-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   6. Technical Skills Matrix Section
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.skill-category-card:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.skill-cat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(14, 165, 233, 0.15);
  color: var(--color-primary-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.skill-cat-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-cat-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  list-style: none;
}

.skill-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.skill-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.skill-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.skill-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: rgba(14, 165, 233, 0.15);
  color: var(--color-primary-400);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.skill-note {
  font-size: 0.78125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   7. Certifications Showcase
   ========================================================================== */
.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-tab {
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tab:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.filter-tab.active {
  background: var(--color-primary-500);
  color: #ffffff;
  border-color: var(--color-primary-500);
  box-shadow: 0 2px 10px var(--color-primary-glow);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.cert-card:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.cert-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.cert-badge-img {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
}

.cert-title-group {
  flex: 1;
}

.cert-issuer {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary-400);
  margin-bottom: 0.2rem;
}

.cert-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.cert-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78125rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 0.85rem;
}

.cert-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.cert-skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.tag-pill {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.cert-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.cert-status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-emerald);
}

.cert-status-badge.pursuing {
  color: var(--color-amber);
}

.cert-verify-link {
  font-size: 0.8125rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   8. Coding & Engineering Projects Section
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

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

.project-img-wrapper {
  width: 100%;
  height: 200px;
  background: var(--bg-surface-elevated);
  overflow: hidden;
  position: relative;
}

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

.project-card:hover .project-img {
  transform: scale(1.03);
}

.project-category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  color: var(--color-primary-400);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.project-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.project-subtitle {
  font-size: 0.875rem;
  color: var(--color-primary-400);
  margin-bottom: 0.875rem;
}

.project-summary {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.project-actions {
  display: flex;
  gap: 0.75rem;
}

/* ==========================================================================
   9. Resume & Work Experience Section
   ========================================================================== */
.resume-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.resume-header-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.resume-toolbar-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.resume-toolbar-info p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

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

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 3px solid var(--color-primary-400);
}

.timeline-header {
  margin-bottom: 0.5rem;
}

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

.timeline-company-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-primary-400);
  font-weight: 600;
  margin-top: 0.2rem;
}

.timeline-period {
  color: var(--text-muted);
  font-weight: normal;
  font-family: var(--font-mono);
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0.75rem 0;
}

.timeline-achievements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.timeline-achievements li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.timeline-achievements li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary-400);
}

.education-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.education-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.education-degree {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.education-inst {
  font-size: 0.875rem;
  color: var(--color-primary-400);
  font-weight: 600;
}

.education-period {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin: 0.25rem 0 0.5rem 0;
}

.education-details {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   10. Contact & Connect Section
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.contact-info-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.contact-info-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.contact-method-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-method-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.contact-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(14, 165, 233, 0.15);
  color: var(--color-primary-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-method-meta {
  flex: 1;
}

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

.contact-method-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--color-primary-500);
  color: #ffffff;
  border-color: var(--color-primary-500);
}

/* Contact Form */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

.form-status-msg {
  margin-top: 1rem;
  font-size: 0.875rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  display: none;
}

.form-status-msg.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--color-emerald);
}

.form-status-msg.error {
  display: block;
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: var(--color-rose);
}

/* ==========================================================================
   11. Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface);
  padding: 3rem 0 2rem 0;
  margin-top: var(--spacing-3xl);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-icon-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-icon-link:hover {
  background: var(--color-primary-500);
  color: #ffffff;
  border-color: var(--color-primary-500);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  background: rgba(14, 165, 233, 0.08);
  color: var(--color-primary-400);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   12. Toast Notification & Back to Top
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--color-primary-400);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: auto;
  animation: toast-in 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transition: opacity 0.3s, transform 0.3s;
}

.toast.toast-out {
  opacity: 0;
  transform: translateY(10px);
}

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

.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 900;
}

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

.back-to-top:hover {
  background: var(--color-primary-500);
  color: #ffffff;
  border-color: var(--color-primary-500);
  transform: translateY(-3px);
}

/* ==========================================================================
   13. Responsive Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-stats {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .education-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 3.75rem;
  }
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    transform: translateY(-150%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .mobile-nav-toggle {
    display: block;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .resume-container {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  .btn {
    width: 100%;
  }
  .hero-actions {
    flex-direction: column;
  }
  .filter-tabs {
    flex-direction: row;
  }
}

/* ==========================================================================
   14. Dedicated Clean Print Stylesheet for Resume Export
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt;
    line-height: 1.4;
  }

  body::before,
  .site-header,
  .hero-section,
  .terminal-wrapper,
  .filter-tabs,
  .site-footer,
  .theme-toggle-btn,
  .btn-primary,
  .back-to-top,
  .toast-container,
  #contact,
  #terminal,
  #about,
  #skills,
  #projects,
  #certs {
    display: none !important;
  }

  #resume {
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .resume-container {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
  }

  .resume-header-toolbar {
    border-bottom: 2px solid #333333 !important;
    padding-bottom: 10px !important;
    margin-bottom: 20px !important;
  }

  .timeline::before {
    background: #999999 !important;
  }

  .timeline-dot {
    background: #000000 !important;
    border-color: #000000 !important;
  }

  .timeline-role {
    color: #000000 !important;
    font-size: 13pt;
  }

  .timeline-company-meta {
    color: #333333 !important;
  }

  .timeline-achievements li {
    color: #222222 !important;
  }
}