/* ==========================================================================
   Design Tokens & Modern Theme Engine
   Adheres to Modern Web Guidance with light-dark() and system preferences
   ========================================================================== */

:root {
  /* Baseline color-scheme handles both system and manual override */
  color-scheme: light dark;

  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Color Tokens using light-dark(lightValue, darkValue) */
  --color-bg-base: light-dark(#f8fafc, #0a0d14);
  --color-bg-surface: light-dark(#ffffff, #111726);
  --color-bg-subtle: light-dark(#f1f5f9, #171f33);
  --color-bg-hover: light-dark(#e2e8f0, #1f2a44);
  
  --color-border: light-dark(#e2e8f0, #222d46);
  --color-border-subtle: light-dark(#edf2f7, #1a2336);
  --color-border-highlight: light-dark(#cbd5e1, #334468);

  --color-text-main: light-dark(#0f172a, #f1f5f9);
  --color-text-muted: light-dark(#475569, #94a3b8);
  --color-text-subtle: light-dark(#64748b, #64748b);

  /* Primary Brand & Accent Colors */
  --color-primary: light-dark(#2563eb, #3b82f6);
  --color-primary-hover: light-dark(#1d4ed8, #60a5fa);
  --color-primary-subtle: light-dark(#eff6ff, rgba(59, 130, 246, 0.12));
  --color-primary-glow: rgba(59, 130, 246, 0.25);

  --color-accent-emerald: light-dark(#059669, #10b981);
  --color-accent-emerald-subtle: light-dark(#ecfdf5, rgba(16, 185, 129, 0.15));

  /* Shadows */
  --shadow-sm: light-dark(0 1px 2px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.3));
  --shadow-md: light-dark(0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 4px 12px rgba(0, 0, 0, 0.4));
  --shadow-lg: light-dark(0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 10px 25px -5px rgba(0, 0, 0, 0.6));
  --shadow-card: light-dark(0 1px 3px rgba(0,0,0,0.05), 0 4px 20px rgba(0,0,0,0.25));

  /* Layout & Spacing */
  --container-max-width: 1040px;
  --header-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Explicit Overrides via document <meta name="color-scheme"> */
:root:has(> head > meta[name="color-scheme"][content="dark"]) {
  color-scheme: dark;
}
:root:has(> head > meta[name="color-scheme"][content="light"]) {
  color-scheme: light;
}

/* ==========================================================================
   Base & Resets
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

ul {
  list-style: none;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background-color: light-dark(rgba(248, 250, 252, 0.85), rgba(10, 13, 20, 0.85));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
}

.header-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text-main);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  letter-spacing: -0.02em;
}

.brand-logo:hover {
  color: var(--color-primary);
}

.logo-accent {
  color: var(--color-primary);
  font-weight: 700;
}

.logo-cursor {
  color: var(--color-primary);
  animation: blink 1.2s infinite;
}

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

.main-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-main);
  background-color: var(--color-bg-subtle);
}

.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--color-text-main);
  border-color: var(--color-border-highlight);
  background: var(--color-bg-hover);
}

/* Show moon in light mode, sun in dark mode */
.theme-toggle-btn .sun-icon {
  display: none;
}
.theme-toggle-btn .moon-icon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  .theme-toggle-btn .sun-icon {
    display: block;
  }
  .theme-toggle-btn .moon-icon {
    display: none;
  }
}

:root:has(> head > meta[name="color-scheme"][content="dark"]) .theme-toggle-btn .sun-icon {
  display: block !important;
}
:root:has(> head > meta[name="color-scheme"][content="dark"]) .theme-toggle-btn .moon-icon {
  display: none !important;
}

:root:has(> head > meta[name="color-scheme"][content="light"]) .theme-toggle-btn .sun-icon {
  display: none !important;
}
:root:has(> head > meta[name="color-scheme"][content="light"]) .theme-toggle-btn .moon-icon {
  display: block !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
}

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-muted);
  border-radius: 2px;
  transition: transform var(--transition-fast);
}

/* ==========================================================================
   Page Layout & Container
   ========================================================================== */

#main-content {
  flex: 1;
}

.page-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

/* ==========================================================================
   Buttons & Micro-Components
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.925rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
}

.btn-large {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff !important;
  box-shadow: 0 2px 10px var(--color-primary-glow);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--color-primary-glow);
}

.btn-secondary {
  background-color: var(--color-bg-surface);
  color: var(--color-text-main) !important;
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-highlight);
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted) !important;
  border-color: var(--color-border-subtle);
}

.btn-ghost:hover {
  background-color: var(--color-bg-subtle);
  color: var(--color-text-main) !important;
}

/* ==========================================================================
   Intro Page / Hero Section
   ========================================================================== */

.hero-section {
  padding: 3rem 0 4.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge-wrapper {
  margin-bottom: 1.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--color-accent-emerald-subtle);
  border: 1px solid light-dark(rgba(5, 150, 105, 0.2), rgba(16, 185, 129, 0.25));
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--color-accent-emerald);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent-emerald);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-text-main) 30%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-headline {
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.hero-tagline {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Section Shared Headers */
.section {
  padding: 3rem 0;
  border-top: 1px solid var(--color-border-subtle);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
}

.section-link {
  font-size: 0.9rem;
  font-weight: 500;
}

/* About Grid */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.narrative-para {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.location-card {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.about-focus-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.focus-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.focus-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-highlight);
}

.focus-icon {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.focus-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.35rem;
}

.focus-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* Skill Pills */
.skill-pills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.95rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.skill-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.skill-pill-more {
  background-color: var(--color-primary-subtle);
  border-color: transparent;
  color: var(--color-primary);
}

/* Selected Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

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

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.3;
}

.project-category-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-subtle);
}

.project-desc {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.project-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
}

.project-highlights {
  list-style: disc;
  margin-left: 1.2rem;
  font-size: 0.85rem;
  color: var(--color-text-subtle);
  line-height: 1.5;
}

.project-highlights li {
  margin-bottom: 0.35rem;
}

/* Resume CTA Banner */
.resume-cta-banner {
  margin-top: 3.5rem;
  background: linear-gradient(135deg, var(--color-bg-surface), var(--color-bg-subtle));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2rem;
  text-align: center;
}

.cta-content h2 {
  font-size: 1.65rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.cta-content p {
  color: var(--color-text-muted);
  max-width: 580px;
  margin: 0 auto 1.75rem;
  font-size: 1.05rem;
}

/* ==========================================================================
   Resume Page Styles
   ========================================================================== */

.resume-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.toolbar-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.toolbar-back-link:hover {
  color: var(--color-text-main);
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Resume Document Sheet */
.resume-document {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  box-shadow: var(--shadow-sm);
}

.resume-header {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 2rem;
  margin-bottom: 2.5rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
}

.resume-name {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.resume-role {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.resume-summary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.resume-contact-meta {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.875rem;
}

.contact-item {
  display: flex;
  gap: 0.5rem;
}

.contact-label {
  font-weight: 600;
  color: var(--color-text-subtle);
  min-width: 75px;
}

.contact-value {
  color: var(--color-text-muted);
}

.resume-section {
  margin-bottom: 2.75rem;
}

.resume-section:last-child {
  margin-bottom: 0;
}

.resume-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
}

.resume-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-main);
}

/* Skills Category Filter Bar */
.skills-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-chip {
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg-base);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  color: var(--color-text-main);
  border-color: var(--color-border-highlight);
}

.filter-chip.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.resume-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.75rem;
}

.skill-badge {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.skill-badge.dimmed {
  opacity: 0.25;
  filter: grayscale(1);
}

.skill-name {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-main);
}

.skill-level {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-subtle);
}

/* Experience Cards in Timeline */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.experience-card {
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid var(--color-border);
}

.experience-card::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 2px solid var(--color-bg-surface);
}

.experience-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.exp-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.exp-company-group {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.exp-company {
  font-weight: 600;
  color: var(--color-text-main);
}

.exp-separator {
  margin: 0 0.35rem;
  color: var(--color-border-highlight);
}

.exp-period-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.exp-period-badge.current {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-color: light-dark(rgba(37, 99, 235, 0.2), rgba(59, 130, 246, 0.3));
}

.exp-summary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.exp-bullets {
  list-style: disc;
  margin-left: 1.25rem;
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.exp-bullets li {
  margin-bottom: 0.4rem;
}

.exp-technologies {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.tech-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  margin-right: 0.2rem;
}

.tech-tag-sm {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
}

/* Projects in Resume */
.resume-projects-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.resume-project-item {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.resume-project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.project-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.link-icon {
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  padding: 0.2rem;
  border-radius: var(--radius-sm);
}

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

.project-summary {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.project-bullets {
  list-style: disc;
  margin-left: 1.2rem;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
  margin-bottom: 0.85rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* Education List */
.education-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.education-item {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.education-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.edu-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.edu-degree {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

.edu-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.edu-institution {
  font-weight: 500;
  color: var(--color-text-main);
}

.edu-location {
  margin-left: 0.5rem;
  color: var(--color-text-subtle);
}

.edu-honors {
  margin-left: 0.5rem;
  color: var(--color-primary);
  font-weight: 500;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-surface);
  padding: 2rem 0;
  margin-top: auto;
}

.footer-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

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

.social-link:hover {
  color: var(--color-text-main);
}

/* ==========================================================================
   Toast Notification (Reactivity Feedback)
   ========================================================================== */

.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 100;
  background-color: var(--color-text-main);
  color: var(--color-bg-base);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all var(--transition-base);
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .resume-header {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 640px) {
  .page-container {
    padding: 2rem 1rem 4rem;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-md);
  }

  .main-nav.open {
    display: block;
  }

  .main-nav .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .resume-document {
    padding: 1.75rem 1.25rem;
  }

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

  .hero-actions {
    width: 100%;
  }

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

/* ==========================================================================
   PRINT STYLESHEET (@media print)
   Formats the resume cleanly for PDF export or paper printing
   ========================================================================== */

@media print {
  /* Hide non-document website elements */
  .site-header,
  .site-footer,
  .resume-toolbar,
  .skills-filter-bar,
  .toast,
  #btn-view-resume,
  #btn-copy-email,
  #btn-contact {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #111827 !important;
    font-size: 11pt !important;
    line-height: 1.45 !important;
  }

  .page-container {
    padding: 0 !important;
    max-width: 100% !important;
  }

  .resume-document {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: #ffffff !important;
  }

  .resume-header {
    border-bottom: 2px solid #111827 !important;
    padding-bottom: 1rem !important;
    margin-bottom: 1.5rem !important;
  }

  .resume-name {
    font-size: 20pt !important;
    color: #000000 !important;
  }

  .resume-role {
    font-size: 13pt !important;
    color: #2563eb !important;
  }

  .resume-section {
    margin-bottom: 1.5rem !important;
    page-break-inside: avoid;
  }

  .resume-section-title {
    font-size: 12pt !important;
    border-bottom: 1px solid #d1d5db !important;
    padding-bottom: 0.25rem !important;
    margin-bottom: 0.75rem !important;
  }

  .experience-card {
    border-left: none !important;
    padding-left: 0 !important;
    margin-bottom: 1rem !important;
    page-break-inside: avoid;
  }

  .experience-card::before {
    display: none !important;
  }

  .exp-period-badge {
    border: none !important;
    background: transparent !important;
    color: #4b5563 !important;
  }

  .skill-badge {
    background: #f3f4f6 !important;
    border: 1px solid #e5e7eb !important;
    color: #111827 !important;
  }

  .skill-badge.dimmed {
    opacity: 1 !important;
    filter: none !important;
  }

  a {
    color: #111827 !important;
    text-decoration: none !important;
  }
}