/* ============================================================
   RILEY CARNEY — Official Portfolio & Engineering Resume
   style.css — Minimalist Professional Executive Design System
   No Emojis • Strict Semantic Layout • Accessible WCAG AAA
   ============================================================ */

/* ------------------------------------------------------------
   1. DESIGN TOKENS & CSS CUSTOM PROPERTIES
   ------------------------------------------------------------ */
:root {
  /* Font Families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Monaco, monospace;

  /* Typography Scale */
  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.84375rem; /* 13.5px */
  --text-base: 0.9375rem;  /* 15px */
  --text-md:   1.0625rem;  /* 17px */
  --text-lg:   1.25rem;    /* 20px */
  --text-xl:   1.5rem;     /* 24px */
  --text-2xl:  1.875rem;   /* 30px */
  --text-3xl:  2.375rem;   /* 38px */
  --text-4xl:  3rem;       /* 48px */

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout Containers */
  --container-max: 1140px;
  --header-height: 68px;

  /* Border Radii */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme (Default: Clean Executive Parchment / Crisp Paper) */
:root,
html[data-theme="light"] {
  --bg-page:           #fbfcfd;
  --bg-surface:        #ffffff;
  --bg-subtle:         #f1f5f9;
  --bg-card:           #ffffff;
  --bg-tag:            #f1f5f9;
  --bg-tag-hover:      #e2e8f0;

  --border-light:      #e2e8f0;
  --border-default:    #cbd5e1;
  --border-strong:     #94a3b8;

  --text-primary:      #0f172a;
  --text-secondary:    #334155;
  --text-muted:        #64748b;
  --text-inverse:      #ffffff;

  --accent-primary:    #0f172a;
  --accent-primary-hover: #1e293b;
  --accent-blue:       #1d4ed8;
  --accent-blue-hover: #1e40af;
  --accent-blue-subtle: #eff6ff;

  --shadow-sm:         0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md:         0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-card:       0 1px 3px rgba(15, 23, 42, 0.05), 0 0 0 1px var(--border-light);
  --shadow-card-hover: 0 4px 12px rgba(15, 23, 42, 0.08), 0 0 0 1px var(--border-default);

  --header-bg:         rgba(251, 252, 253, 0.88);
}

/* Dark Theme (Executive Slate Obsidian) */
html[data-theme="dark"] {
  --bg-page:           #090d16;
  --bg-surface:        #0f1523;
  --bg-subtle:         #151e30;
  --bg-card:           #101726;
  --bg-tag:            #172238;
  --bg-tag-hover:      #1f2e4a;

  --border-light:      #1e293b;
  --border-default:    #2c3a50;
  --border-strong:     #475569;

  --text-primary:      #f8fafc;
  --text-secondary:    #cbd5e1;
  --text-muted:        #94a3b8;
  --text-inverse:      #0f172a;

  --accent-primary:    #f8fafc;
  --accent-primary-hover: #e2e8f0;
  --accent-blue:       #60a5fa;
  --accent-blue-hover: #93c5fd;
  --accent-blue-subtle: #1e293b;

  --shadow-sm:         0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md:         0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-card:       0 1px 3px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-light);
  --shadow-card-hover: 0 4px 14px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-default);

  --header-bg:         rgba(9, 13, 22, 0.88);
}

/* ------------------------------------------------------------
   2. RESET & BASE STYLES
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Accessible Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--accent-primary);
  color: var(--text-inverse);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--accent-blue);
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.25;
  text-wrap: balance;
}

p, li, blockquote {
  text-wrap: pretty;
}

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

a:hover {
  color: var(--accent-blue-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

ul, ol {
  list-style: none;
}

/* Layout container */
.content-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 640px) {
  .content-container {
    padding: 0 var(--space-4);
  }
}

/* ------------------------------------------------------------
   3. BUTTONS & INTERACTIVE CONTROLS
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.125rem;
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none !important;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--text-inverse) !important;
  border-color: var(--accent-primary);
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  color: var(--text-inverse) !important;
}

.btn-outline {
  background-color: var(--bg-surface);
  color: var(--text-primary) !important;
  border-color: var(--border-default);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
  border-color: var(--border-strong);
  color: var(--text-primary) !important;
}

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

.btn-secondary:hover {
  background-color: var(--bg-tag-hover);
  border-color: var(--border-default);
  color: var(--text-primary) !important;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--text-xs);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background-color: var(--bg-subtle);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.btn-text {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ------------------------------------------------------------
   4. NAVIGATION / TOP MASTHEAD
   ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--border-default);
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  text-decoration: none !important;
}

.brand-name {
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-separator {
  color: var(--text-muted);
  font-weight: 300;
}

.brand-title {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: inline-block;
  padding: 0.375rem 0.625rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  text-decoration: none !important;
  transition: all var(--transition-fast);
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme Toggle Sun / Moon */
#theme-toggle .icon-sun {
  display: none;
}

#theme-toggle .icon-moon {
  display: block;
}

html[data-theme="dark"] #theme-toggle .icon-sun {
  display: block;
}

html[data-theme="dark"] #theme-toggle .icon-moon {
  display: none;
}

/* Mobile Menu Hamburger Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
}

.hamburger-line {
  display: block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  box-shadow: var(--shadow-md);
  padding: var(--space-4) 0;
}

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

.mobile-nav-inner {
  padding: 0 var(--space-6);
}

.mobile-nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-size: var(--text-md);
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  text-decoration: none !important;
}

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

.mobile-nav-actions {
  margin-top: var(--space-4);
  padding-top: var(--space-2);
}

@media (max-width: 900px) {
  .brand-title {
    display: none;
  }

  .desktop-nav {
    display: none;
  }

  .header-resume-btn {
    display: none;
  }

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

/* ------------------------------------------------------------
   5. HERO / EXECUTIVE PROFILE SECTION
   ------------------------------------------------------------ */
.hero-section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--border-light);
  background-color: var(--bg-page);
}

.hero-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 800px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* Media column */
.hero-media-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.portrait-frame {
  width: 240px;
  height: 240px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-default);
  background-color: var(--bg-subtle);
  box-shadow: var(--shadow-card);
}

.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.status-indicator-box {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xs);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981; /* understated emerald green */
}

.status-text {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
}

/* Content column */
.hero-content-col {
  display: flex;
  flex-direction: column;
}

.official-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.bullet-divider {
  color: var(--text-muted);
  opacity: 0.6;
}

.hero-heading {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

@media (max-width: 640px) {
  .hero-heading {
    font-size: var(--text-3xl);
  }
}

.hero-role-title {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.role-separator {
  color: var(--text-muted);
  margin: 0 var(--space-1);
}

.hero-contact-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.contact-link {
  color: var(--text-secondary);
  text-decoration: none;
}

.contact-link:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.hero-summary-lead {
  font-size: var(--text-md);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: 48rem;
}

.hero-action-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

/* ------------------------------------------------------------
   6. CAREER METRICS / HIGHLIGHTS SECTION
   ------------------------------------------------------------ */
.metrics-section {
  padding: var(--space-8) 0;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 900px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

.metric-card {
  padding: var(--space-4) var(--space-5);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
}

.metric-number {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.metric-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.metric-desc {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.45;
}

/* ------------------------------------------------------------
   7. SECTION HEADERS & GENERAL SECTION BLOCKS
   ------------------------------------------------------------ */
.section-block {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--border-light);
}

.section-header-box {
  margin-bottom: var(--space-10);
}

.section-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.section-rule {
  width: 100%;
  height: 1px;
  background-color: var(--border-light);
}

/* ------------------------------------------------------------
   8. EXECUTIVE SUMMARY SECTION
   ------------------------------------------------------------ */
.summary-body-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .summary-body-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.summary-statement-card,
.summary-details-card {
  padding: var(--space-6);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

.statement-title {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-light);
}

.statement-paragraph {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-secondary);
}

.foundation-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-secondary);
}

.foundation-list li {
  position: relative;
  padding-left: var(--space-4);
}

.foundation-list li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

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

/* ------------------------------------------------------------
   9. PROFESSIONAL EXPERIENCE (TIMELINE)
   ------------------------------------------------------------ */
.timeline-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.timeline-entry {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-light);
}

.timeline-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

@media (max-width: 768px) {
  .timeline-entry {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.timeline-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.timeline-period-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  white-space: nowrap;
}

.timeline-location-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.timeline-main {
  display: flex;
  flex-direction: column;
}

.timeline-entry-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.entry-role {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.entry-org {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--accent-blue);
  margin-top: 0.125rem;
}

.entry-badge-status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  background-color: var(--accent-blue-subtle);
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
  border-radius: var(--radius-xs);
  white-space: nowrap;
}

.entry-bullet-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.entry-bullet-list li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-secondary);
}

.entry-bullet-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

.entry-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-tag);
  border: 1px solid var(--border-light);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
}

/* ------------------------------------------------------------
   10. TECHNICAL PROJECTS SECTION
   ------------------------------------------------------------ */
.project-subsection {
  margin-bottom: var(--space-12);
}

.project-subsection:last-child {
  margin-bottom: 0;
}

.subsection-header {
  margin-bottom: var(--space-5);
}

.subsection-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: var(--space-1);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

.project-card {
  padding: var(--space-6);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.project-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-default);
}

/* Featured GitHub Repo Card */
.repo-card-featured {
  border-top: 3px solid var(--accent-blue);
}

/* Language Dots */
.lang-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: middle;
}

.lang-dot-ps {
  background-color: #012456;
}

html[data-theme="dark"] .lang-dot-ps {
  background-color: #58a6ff;
}

.lang-dot-html {
  background-color: #e34c26;
}

html[data-theme="dark"] .lang-dot-html {
  background-color: #f97316;
}

.lang-dot-js {
  background-color: #f59e0b;
}

html[data-theme="dark"] .lang-dot-js {
  background-color: #fbbf24;
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.project-year-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
}

.project-domain {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent-blue);
}

.project-title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.project-ext-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--text-primary);
  text-decoration: none;
}

.project-ext-link:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.project-role-caption {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}

.project-narrative {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.feature-bullets {
  margin: var(--space-2) 0 var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.feature-bullets li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--text-secondary);
}

.feature-bullets li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

.feature-bullets code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  padding: 0.05rem 0.25rem;
  border-radius: var(--radius-xs);
  color: var(--text-primary);
}

.project-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: auto;
}

.project-card-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-light);
}

/* Technical Writing Sub-block */
.subsection-wrap {
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-light);
}

.subsection-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.writing-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .writing-list-grid {
    grid-template-columns: 1fr;
  }
}

.writing-card {
  padding: var(--space-5);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

.writing-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.writing-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.article-anchor {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.375rem;
  color: var(--text-primary);
  text-decoration: none;
}

.article-anchor:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

.writing-summary {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--text-secondary);
}

/* ------------------------------------------------------------
   11. TECHNICAL SKILLS MATRIX
   ------------------------------------------------------------ */
.skills-matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .skills-matrix-grid {
    grid-template-columns: 1fr;
  }
}

.skill-category-card {
  padding: var(--space-6);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.skill-cat-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-light);
}

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

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.skill-pills li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-tag);
  border: 1px solid var(--border-default);
  padding: 0.3rem 0.625rem;
  border-radius: var(--radius-xs);
}

.skill-cat-note {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: auto;
}

/* ------------------------------------------------------------
   12. EDUCATION & CERTIFICATIONS
   ------------------------------------------------------------ */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .edu-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.edu-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.column-subheading {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-2);
}

.edu-card {
  padding: var(--space-5);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

.edu-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.edu-degree {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
}

.edu-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.edu-institution {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: var(--space-2);
}

.edu-summary {
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--text-secondary);
}

/* Certifications Items */
.cert-card-item {
  padding: var(--space-4) var(--space-5);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.cert-card-item.cert-featured {
  border-left: 3px solid var(--accent-primary);
}

.cert-item-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
}

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

.cert-org {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 0.125rem;
}

.cert-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.15rem 0.4rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  white-space: nowrap;
}

.cert-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  margin-top: var(--space-1);
}

.cert-id-string {
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.cert-verify-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-blue);
  text-decoration: none;
}

.cert-verify-link:hover {
  text-decoration: underline;
}

/* ------------------------------------------------------------
   13. OFFICIAL RESUME DOCUMENT SECTION
   ------------------------------------------------------------ */
.resume-dossier-card {
  padding: var(--space-8);
  background-color: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

@media (max-width: 640px) {
  .resume-dossier-card {
    padding: var(--space-6);
  }
}

.resume-dossier-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.dossier-doc-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  flex-shrink: 0;
}

.dossier-meta-info {
  display: flex;
  flex-direction: column;
}

.dossier-file-title {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--text-primary);
}

.dossier-spec-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.dossier-description {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: 48rem;
}

.dossier-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

/* ------------------------------------------------------------
   14. CONTACT & INQUIRIES SECTION
   ------------------------------------------------------------ */
.contact-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .contact-card-grid {
    grid-template-columns: 1fr;
  }
}

.contact-channel-card {
  padding: var(--space-5);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.channel-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  flex-shrink: 0;
}

.channel-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  min-width: 0;
}

.channel-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.channel-value {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
}

.channel-value:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

/* ------------------------------------------------------------
   15. SITE FOOTER
   ------------------------------------------------------------ */
.site-footer {
  padding: var(--space-12) 0 var(--space-8);
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-light);
}

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-light);
}

@media (max-width: 768px) {
  .footer-grid {
    flex-direction: column;
    gap: var(--space-6);
  }
}

.footer-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
}

.footer-subtitle {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-top: 0.125rem;
}

.footer-meta {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-nav-list a {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

.copyright-text {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ------------------------------------------------------------
   16. PRINT STYLESHEET (@media print)
   ------------------------------------------------------------ */
@media print {
  *, *::before, *::after {
    background: transparent !important;
    color: #000000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 10pt;
    line-height: 1.4;
    background: #ffffff !important;
  }

  /* Hide screen-only chrome */
  .site-header,
  .hero-action-group,
  .mobile-menu-btn,
  .mobile-nav,
  #theme-toggle,
  #print-resume-btn,
  #scroll-to-top,
  .status-indicator-box,
  .btn,
  .skip-link {
    display: none !important;
  }

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

  .section-block {
    padding: 1rem 0 !important;
    border-bottom: 1px solid #cccccc !important;
    page-break-inside: avoid;
  }

  .hero-section {
    padding: 0 0 1.5rem 0 !important;
  }

  .hero-grid {
    grid-template-columns: 140px 1fr !important;
    gap: 1.5rem !important;
  }

  .portrait-frame {
    width: 140px !important;
    height: 140px !important;
    border: 1px solid #000000 !important;
  }

  .hero-heading {
    font-size: 20pt !important;
  }

  .timeline-entry {
    grid-template-columns: 160px 1fr !important;
    gap: 1rem !important;
    padding-bottom: 1rem !important;
    page-break-inside: avoid;
  }

  .project-card,
  .skill-category-card,
  .edu-card,
  .cert-card-item {
    border: 1px solid #cccccc !important;
    box-shadow: none !important;
    page-break-inside: avoid;
  }

  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 8pt;
    color: #555555;
  }

  .site-footer {
    border-top: 1px solid #000000 !important;
    padding: 1rem 0 !important;
  }
}