/* ============================================
   Design System: "The Machined Executive"
   Phase 2 — Full token set, typography, layout,
   components, animation, scroll reveal
   ============================================ */

/* ------------------------------------------
   Section 1: Design Tokens
   ------------------------------------------ */
:root {
  /* Primitive tokens (raw color values) */
  --color-charcoal-900: #0d0d14;
  --color-charcoal-800: #13131a;
  --color-charcoal-700: #1b1b22;
  --color-charcoal-600: #1f1f26;
  --color-charcoal-500: #2a2931;
  --color-charcoal-400: #34343c;
  --color-teal: #8ad3d3;
  --color-teal-container: #539c9c;
  --color-copper: #feb87a;
  --color-copper-container: #b47840;
  --color-gold: #e6c460;
  --color-gold-container: #c8a848;
  --color-cyan: #50b4c8;
  --color-text-light: #d8dce0;
  --color-text-body: #b8c0c8;
  --color-text-muted: #889099;

  /* Semantic tokens — Surface hierarchy */
  --surface: var(--color-charcoal-900);
  --surface-dim: var(--color-charcoal-800);
  --surface-container-low: var(--color-charcoal-700);
  --surface-container: var(--color-charcoal-600);
  --surface-container-high: var(--color-charcoal-500);
  --surface-container-highest: var(--color-charcoal-400);

  /* Semantic tokens — Text */
  --text-primary: var(--color-text-light);
  --text-body: var(--color-text-body);
  --text-secondary: var(--color-text-muted);

  /* Semantic tokens — Accents (bright, for text/icons/borders) */
  --accent-primary: var(--color-teal);
  --accent-secondary: var(--color-copper);
  --accent-tertiary: var(--color-gold);
  --accent-technical: var(--color-cyan);

  /* Container accents (muted, for button fills/badge backgrounds) */
  --accent-primary-container: var(--color-teal-container);
  --accent-secondary-container: var(--color-copper-container);
  --accent-tertiary-container: var(--color-gold-container);

  /* Ghost borders */
  --ghost-border: rgba(136, 144, 153, 0.20);
  --ghost-border-hover: rgba(136, 144, 153, 0.40);

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Space Grotesk', ui-monospace, 'SFMono-Regular', monospace;
  --letter-spacing-tight: -0.02em;
  --letter-spacing-wide: 0.1em;
  --line-height-body: 1.6;

  /* Borders */
  --radius-sm: 2px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--surface);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-tight);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--accent-primary-container);
  color: var(--surface);
}

/* ------------------------------------------
   Section 3: Typography
   ------------------------------------------ */
h1 {
  font-size: clamp(3.75rem, 7.5vw, 6rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--text-primary);
}

h3 {
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.3;
  color: var(--text-primary);
}

p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-body);
  font-weight: 400;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: normal;
}

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

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ------------------------------------------
   Section 4: Layout
   ------------------------------------------ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* All sections on base surface */

footer {
  background-color: var(--surface);
}

/* All sections: generous vertical spacing */
section {
  padding: 0;
  margin-bottom: 160px;
}

#hero {
  margin-bottom: 128px;
}

/* Section content — label above, content below */
.section-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 1024px) {
  .section-content {
    padding: 0 96px;
  }
}

/* ------------------------------------------
   Section 5: Components
   ------------------------------------------ */

/* Section label — minimal, no border */
.section-label {
  font-size: 10px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--accent-secondary);
  margin-bottom: var(--space-2xl);
}

/* Career & Expertise labels get more breathing room */
#career .section-label,
#expertise .section-label {
  margin-bottom: var(--space-3xl);
}

/* Badge — left accent border with tonal background */
.badge {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-lg);
  background-color: var(--surface-container-low);
  border-left: 2px solid var(--accent-primary);
  border-radius: 0;
}

/* Chip */
.chip {
  background: transparent;
  border: 1px solid rgba(136, 147, 146, 0.20);
  border-radius: var(--radius-sm);
  padding: 12px var(--space-lg);
  font-size: 10px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--text-body);
  transition: border-color 0.2s ease;
}

.chip:hover {
  border-color: rgba(136, 147, 146, 0.40);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  border-radius: 0;
  cursor: pointer;
  transition: border-color 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
  text-decoration: none;
}

.btn--primary {
  background-color: var(--accent-primary-container);
  color: var(--surface);
  border: 1px solid var(--accent-primary-container);
}

.btn--primary:hover {
  opacity: 0.9;
}

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

.btn--secondary:hover {
  background-color: rgba(180, 120, 64, 0.10);
}

/* Patent card */
.patent-card {
  background-color: var(--surface-container-high);
  border-left: 4px solid var(--accent-secondary);
  padding: var(--space-2xl);
  border-radius: 0;
}

.patent-card__number {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}


.patent-card__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
  border-left: 1px solid var(--surface-container-highest);
  margin-left: 8px;
}

.timeline__entry {
  position: relative;
  padding-bottom: 80px;
}

.timeline__entry:last-child {
  padding-bottom: 0;
}

.timeline__node {
  width: 12px;
  height: 12px;
  background-color: var(--accent-primary);
  position: absolute;
  left: -47px;
  top: 4px;
  transform: rotate(45deg);
}

/* Timeline header — title + date on same line */
.timeline__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.timeline__date {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.timeline__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Timeline role text — copper accent like prototype */
.timeline__entry .timeline__role {
  font-size: 1.125rem;
  color: var(--accent-secondary);
  margin-bottom: var(--space-sm);
}

/* Acquisition badge — own line below role */
.acquisition-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  padding: 4px var(--space-md);
  border: 1px solid rgba(254, 184, 122, 0.20);
  background-color: rgba(109, 61, 8, 0.30);
  color: var(--accent-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

/* Footer */
footer {
  padding: 48px 0;
  margin-top: 160px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--text-secondary);
}

/* ------------------------------------------
   Section 5b: Hero, About & Career Layout
   ------------------------------------------ */

/* Hero layout */
.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 128px var(--space-xl) var(--space-3xl);
}

/* Hero text constrained to ~66% width like prototype; badges use full width */
@media (min-width: 1024px) {
  .hero-content {
    padding: 128px 96px var(--space-3xl);
  }
  .hero-descriptor {
    max-width: 66%;
  }
}

/* Hero descriptor */
.hero-descriptor {
  font-size: 1.5rem;
  color: var(--text-body);
  max-width: 768px;
  margin: 0 0 var(--space-3xl);
  font-weight: 300;
  line-height: 1.625;
}

/* Hero badges container */
.hero-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: 0 0 80px;
}

/* Badge accent color variants */
.badge--teal { border-left-color: var(--accent-primary); }
.badge--gold { border-left-color: var(--accent-tertiary); }
.badge--copper { border-left-color: var(--accent-secondary); }

.badge__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--accent-primary);
  margin-bottom: var(--space-xs);
}

.badge--gold .badge__tag { color: var(--accent-tertiary); }
.badge--copper .badge__tag { color: var(--accent-secondary); }

.badge__stat {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: none;
  letter-spacing: var(--letter-spacing-tight);
}

.badge__label {
  font-size: 0.8125rem;
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  margin-top: var(--space-xs);
}

/* About grid — 7:5 ratio with wide gap */
.about-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-4xl);
}

/* About bio paragraphs */
.about-bio p {
  font-size: 1.25rem;
  color: var(--text-body);
  font-weight: 300;
  line-height: 1.8;
}

.about-bio p + p {
  margin-top: var(--space-xl);
}

/* Headshot container */
.headshot {
  width: 140px;
  height: 140px;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--surface-container);
  margin-bottom: var(--space-lg);
}

.headshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) brightness(0.9);
  position: relative;
  z-index: 1;
}

.headshot__initials {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--accent-primary);
  font-family: var(--font-body);
}

/* About details definition list */
.about-details {
  margin-top: var(--space-lg);
}

.about-details dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--text-secondary);
  margin-top: var(--space-md);
}

.about-details dt:first-child {
  margin-top: 0;
}

.about-details dd {
  font-size: 0.875rem;
  margin-top: 6px;
}

/* ------------------------------------------
   Section 5c: Expertise, Patent & Contact Layout
   ------------------------------------------ */

/* Expertise rows */
.expertise-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

/* Expertise section — full-width tonal background */
.expertise-section {
  background-color: #0e0e15;
  padding: var(--space-4xl) 0;
}

/* Contact content — constrained width */
.contact-content {
  max-width: 50%;
}

/* Contact heading — large bold */
.contact-heading {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
}

/* Contact body text */
.contact-content p {
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
}

/* Contact actions */
.contact-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

/* Patent card title */
.patent-card__title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.25;
}

/* Patent card meta label */
.patent-card__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}

/* Patent card description */
.patent-card__description {
  color: var(--text-body);
  margin-top: var(--space-lg);
  line-height: var(--line-height-body);
}

/* Patent card citations */
.patent-card__citations {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-lg);
}

/* Patent card link */
.patent-card__link {
  display: inline-block;
  margin-top: var(--space-lg);
  font-size: 0.875rem;
}

/* Footer spectrum line */
footer::before {
  content: '';
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg,
    var(--accent-primary),
    var(--accent-tertiary),
    var(--accent-secondary),
    var(--accent-tertiary),
    var(--accent-primary)
  );
  background-size: 300% 100%;
  animation: spectrum-drift 10s ease-in-out infinite;
  margin-bottom: 48px;
}

/* Footer layout — centered column */
footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ------------------------------------------
   Section 5d: Sidebar Card, Career Surfaces & Text Constraints
   ------------------------------------------ */

/* Sidebar card — component set into chassis */
.sidebar-card {
  background-color: var(--surface-container);
  border-radius: 4px;
  padding: var(--space-xl);
}

.sidebar-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.sidebar-card__header .headshot {
  width: 96px;
  height: 96px;
  margin-bottom: 0;
  flex-shrink: 0;
  border-radius: 4px;
}

.sidebar-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sidebar-card__title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
  letter-spacing: 0.02em;
}

/* Career entry body text */
.timeline__entry p {
  color: var(--text-body);
  max-width: 580px;
}

/* Body text max-width for readability */
.about-bio {
  max-width: 672px;
}

.patent-card__description {
  max-width: 580px;
}

/* ------------------------------------------
   Section 6: Spectrum Gradient Line
   ------------------------------------------ */
.spectrum-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg,
    var(--accent-primary),
    var(--accent-technical),
    var(--accent-tertiary),
    var(--accent-secondary),
    var(--accent-primary)
  );
  background-size: 300% 100%;
  animation: spectrum-drift 10s ease-in-out infinite;
}

@keyframes spectrum-drift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ------------------------------------------
   Section 7: Scroll Reveal
   ------------------------------------------ */
section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero always visible immediately */
#hero {
  opacity: 1;
  transform: none;
}

/* ------------------------------------------
   Section 8: Accessibility — Contrast Fixes
   ------------------------------------------ */

/* Boost contrast on elevated surfaces (WCAG AA fix) */
.patent-card .text-muted,
.patent-card__number,
.patent-card__citations {
  color: #8d959e;
}

.patent-card__link {
  color: var(--accent-primary);
}

/* ------------------------------------------
   Section 9: Responsive Breakpoints
   ------------------------------------------ */

/* Mobile: 0–767px */
@media (max-width: 767px) {
  h1 {
    font-size: clamp(2rem, 5vw + 1rem, 3rem);
  }

  h2 {
    font-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem);
  }

  section {
    margin-bottom: var(--space-4xl);
  }

  .section-content {
    padding: 0 var(--space-md);
  }

  .hero-content {
    padding: var(--space-3xl) var(--space-md) var(--space-xl);
  }

  .hero-badges {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about-sidebar {
    order: -1;
  }

  .contact-content {
    max-width: 100%;
  }

  .contact-heading {
    font-size: 1.75rem;
  }

  .contact-actions {
    max-width: 100%;
    align-items: stretch;
  }

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

  .timeline__header {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .hero-content h1,
  .hero-descriptor,
  .hero-badges {
    max-width: 100%;
  }

  .patent-card {
    padding: var(--space-lg);
  }

  .container {
    padding: 0 var(--space-md);
  }
}

/* Tablet: 768px–1023px */
@media (min-width: 768px) and (max-width: 1023px) {
  .section-content {
    padding: 0 var(--space-xl);
  }

  .about-grid {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
  }

  .contact-content {
    max-width: 75%;
  }
}