/* ============================================
   HERSH-WEB: Motorsport-Inspired Dark Theme
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Dark theme with subtle racing accents */
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-tertiary: #1a1a1a;
  --color-bg-elevated: #222222;

  --color-text-primary: #e5e5e5;
  --color-text-secondary: #a3a3a3;
  --color-text-tertiary: #737373;
  --color-text-muted: #525252;

  --color-accent: #dc2626;
  --color-accent-dim: #991b1b;
  --color-accent-glow: rgba(220, 38, 38, 0.15);

  --color-border: #262626;
  --color-border-subtle: #1f1f1f;

  --color-success: #22c55e;
  --color-warning: #eab308;

  /* Typography */
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;

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

  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-6);

  /* Effects */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Grid overlay opacity */
  --grid-opacity: 0.035;
}

/* --- Reset & Base --- */
*,
*::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);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }

p {
  color: var(--color-text-secondary);
}

strong {
  color: var(--color-text-primary);
  font-weight: 500;
}

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

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

ul {
  list-style: none;
}

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

.section {
  padding: var(--space-24) 0;
  position: relative;
}

.section-header {
  margin-bottom: var(--space-12);
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-title {
  font-size: var(--text-2xl);
  color: var(--color-text-primary);
}

.section-subtitle {
  width: 100%;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-2);
}

/* --- Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.logo-indicator {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition-fast);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  margin-bottom: var(--space-6);
}

.status-indicator {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.status-text {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: clamp(var(--text-4xl), 8vw, var(--text-5xl));
  margin-bottom: var(--space-2);
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 560px;
  line-height: 1.7;
}

.hero-metrics {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

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

.metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Delta Indicators - Lap time style */
.delta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: 2px;
}

.delta-positive {
  background: var(--color-success);
  color: var(--color-bg-primary);
}

.delta-negative {
  background: var(--color-accent);
  color: white;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: var(--grid-opacity);
  pointer-events: none;
}

/* Hero Geometric Accents - Speed lines */
.hero-accents {
  position: absolute;
  right: 0;
  top: 0;
  width: 40%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.hero-accents svg {
  width: 100%;
  height: 100%;
  color: var(--color-text-primary);
  opacity: 0.04;
}


/* --- Telemetry Strip --- */
.telemetry-strip {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-3) var(--space-6);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent-dim);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-text-tertiary);
}

/* --- About Section --- */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.about-lead {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.about-text p {
  font-size: var(--text-base);
  line-height: 1.7;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-4);
  margin: var(--space-2) 0;
}

.highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.highlight-marker {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 1px;
  margin-top: 0.5em;
  flex-shrink: 0;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.detail-block h3 {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.detail-block p,
.detail-block li {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.detail-block ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* --- Experience / Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-12);
}

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

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-8) - 4px);
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--color-bg-primary);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

.timeline-content {
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

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

.timeline-header h3 {
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.timeline-company {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.timeline-summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
  line-height: 1.6;
}

.timeline-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.timeline-details li {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding-left: var(--space-4);
  position: relative;
  line-height: 1.5;
}

.timeline-details li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-text-tertiary);
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
}

.timeline-tech span {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-primary);
  border-radius: 2px;
}

/* --- Projects Section --- */
.section-featured {
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 50%, var(--color-bg-primary) 100%);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}

.project-card {
  padding: var(--space-6);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--color-text-muted);
  background: var(--color-bg-tertiary);
}

.project-featured {
  grid-column: 1 / -1;
  border-color: var(--color-accent-dim);
  background: var(--color-bg-secondary);
}

.project-featured:hover {
  border-color: var(--color-accent);
}

.project-header {
  margin-bottom: var(--space-4);
}

.project-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.project-title {
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.project-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
}

.project-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-primary);
  border-radius: 4px;
  border: 1px solid var(--color-border-subtle);
}

.project-detail {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.project-detail-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-detail-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.project-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.project-tech li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-secondary);
  border-radius: 2px;
}

.project-featured .project-tech li {
  background: var(--color-bg-primary);
}

.projects-cta {
  display: flex;
  justify-content: center;
  margin-top: var(--space-12);
}

/* --- Skills Section - Tachometer Style --- */
.skills-tachometers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.tach-group {
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.tach-group-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.tach-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: var(--space-4);
}

.tach-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.tach-gauge {
  width: 70px;
  height: 42px;
}

.tach-bg {
  stroke: var(--color-border);
}

.tach-fill {
  stroke: var(--color-text-tertiary);
  stroke-dasharray: 126;
  stroke-dashoffset: calc(126 - (126 * var(--tach-percent, 50) / 100));
}

.tach-fill[data-level="high"] {
  stroke: var(--color-accent);
}

.tach-fill[data-level="mid"] {
  stroke: var(--color-warning);
}

.tach-redline {
  fill: var(--color-accent);
}

.tach-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-align: center;
}

/* --- Contact Section --- */
.contact-content {
  max-width: 600px;
}

.contact-intro {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

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

.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.contact-link:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-tertiary);
}

.contact-link-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-link-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

/* --- Checkered Flag Accent --- */
.checkered-strip {
  height: 8px;
  background-image:
    linear-gradient(45deg, var(--color-text-muted) 25%, transparent 25%),
    linear-gradient(-45deg, var(--color-text-muted) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--color-text-muted) 75%),
    linear-gradient(-45deg, transparent 75%, var(--color-text-muted) 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
  opacity: 0.15;
}

/* --- Footer --- */
.site-footer {
  padding: var(--space-8) 0;
  padding-top: 0;
}

.site-footer .container {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-4);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4);
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .nav-toggle {
    display: flex;
  }

  .hero-metrics {
    flex-wrap: wrap;
    gap: var(--space-6);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .telemetry-strip {
    justify-content: flex-start;
    gap: var(--space-6);
    padding: var(--space-3) var(--space-4);
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .about-highlights {
    padding-left: var(--space-3);
  }

  .timeline {
    padding-left: var(--space-6);
  }

  .timeline-header {
    flex-direction: column;
  }

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

  .project-featured {
    grid-column: auto;
  }

  .project-details {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }

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

  .tach-items {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-accents {
    width: 30%;
    opacity: 0.5;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: var(--text-3xl);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .hero-metrics {
    flex-direction: column;
    gap: var(--space-4);
  }

  .metric {
    flex-direction: row;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .telemetry-strip {
    gap: var(--space-4);
  }

  .telemetry-item {
    min-width: 60px;
  }

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

  .tach-gauge {
    width: 60px;
    height: 36px;
  }

  .hero-accents {
    display: none;
  }
}

/* --- Accessibility --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

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

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: white;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  z-index: 1000;
  border-radius: 4px;
}

.skip-link:focus {
  top: var(--space-4);
}