/* Fletch Lite — Documentation Engineer Portfolio */
/* Light and dark mode support, minimal aesthetic */

:root {
  /* Color palette — light mode */
  --primary: #004d66;        /* Deep teal */
  --secondary: #007878;      /* Medium teal */
  --accent: #d4a574;         /* Warm sand (restraint) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f7f5;   /* Warm off-white */
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-tertiary: #6f6f6f;
  --border: #e0ddd8;
  --border-light: #f0ede8;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  
  /* Type scale */
  --text-sm: 13px;
  --text-base: 16px;
  --text-lg: 20px;
  --text-xl: 24px;
  --text-2xl: 32px;
  --text-3xl: 42px;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #4db8d4;        /* Lighter teal for dark mode */
    --secondary: #00bfbf;      /* Bright teal accent */
    --accent: #d4a574;         /* Sand stays constant */
    --bg-primary: #0f1416;     /* Near-black */
    --bg-secondary: #1a2428;   /* Dark slate */
    --text-primary: #e8e6e1;
    --text-secondary: #a8a5a0;
    --text-tertiary: #96938f;
    --border: #2a3238;
    --border-light: #1f2729;
  }
}

/* Mobile layout */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    padding: 0;
  }
}


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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--primary);
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 4px;
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  z-index: 100;
  transition: border-color 0.3s ease;
}

.nav-container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  width: 100%;
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

/* Hero section */
.hero {
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.2;
  color: var(--primary);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-target {
  font-size: var(--text-base);
  color: var(--secondary);
  font-style: italic;
  margin: var(--space-lg) 0;
  font-weight: 500;
}

/* Homepage: a generous, editorial-scale introduction */
.home main {
  display: grid;
}

.home .hero {
  width: min(100%, 1200px);
  min-height: calc(100svh - 170px);
  margin: 0 auto;
  padding: clamp(5rem, 12vh, 9rem) clamp(1.5rem, 5vw, 4rem);
  display: grid;
  align-content: center;
  justify-items: center;
}

.home .hero h1 {
  max-width: 1000px;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  font-size: clamp(3rem, 6vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.home .hero-subtitle {
  max-width: 780px;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.45;
}

.home .hero-target {
  max-width: 720px;
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  font-style: normal;
}

.home .hero-context {
  max-width: 720px;
  margin: clamp(1.75rem, 4vw, 3rem) 0 0;
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  line-height: 1.75;
  color: var(--text-secondary);
}

.home .hero-context a {
  color: var(--secondary);
  font-weight: 600;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  transition: color 0.2s ease;
}

.home .hero-context a:hover {
  color: var(--primary);
}

.home .button-group {
  margin-top: clamp(2rem, 4vw, 3.5rem);
  gap: clamp(0.75rem, 2vw, 1.25rem);
}

.home .btn {
  padding: 1rem clamp(1.5rem, 3vw, 2.25rem);
  font-size: 1rem;
}

.home footer {
  margin-top: 0;
}

/* CTA Buttons */
.button-group {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  border: 2px solid var(--primary);
  background-color: transparent;
  color: var(--primary);
  text-decoration: none;
  font-size: var(--text-base);
  border-radius: 0;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

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

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

.btn-secondary:hover {
  background-color: var(--secondary);
  color: var(--bg-primary);
}

/* Sections */
section {
  padding: var(--space-2xl) var(--space-lg);
  border-top: 1px solid var(--border-light);
}

.container > h1,
section h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--primary);
}

.container > h2 {
  margin-top: var(--space-2xl);
}

.resume-link {
  margin-top: var(--space-xl);
}

section p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* About section */
.about-content {
  display: grid;
  gap: var(--space-2xl);
}

.about-block {
  border-left: 3px solid var(--secondary);
  padding-left: var(--space-lg);
}

.about-block h3 {
  font-size: var(--text-lg);
  color: var(--primary);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

/* Timeline */
.timeline {
  display: grid;
  gap: var(--space-2xl);
  margin-top: var(--space-xl);
}

.timeline-item {
  border-left: 3px solid var(--secondary);
  padding-left: var(--space-lg);
  position: relative;
  padding-bottom: var(--space-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 0;
  width: 12px;
  height: 12px;
  background-color: var(--secondary);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-item h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--space-xs);
}

.timeline-item ul {
  padding-left: var(--space-lg);
}

.timeline-meta {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.timeline-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Writing samples grid */
.writing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.writing-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.writing-card:hover {
  border-color: var(--secondary);
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 77, 102, 0.1);
}

@media (prefers-color-scheme: dark) {
  .writing-card:hover {
    box-shadow: 0 8px 16px rgba(77, 184, 212, 0.1);
  }
}

.writing-card h2 {
  font-size: var(--text-lg);
  color: var(--primary);
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.writing-card p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.writing-card a {
  display: inline-block;
  color: var(--secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* Contact section */
.contact-methods {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--primary);
  text-decoration: none;
  font-size: var(--text-base);
  font-weight: 500;
  transition: color 0.2s ease;
  overflow-wrap: anywhere;
  max-width: 100%;
}

.contact-link:hover {
  color: var(--secondary);
}

/* Footer */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-2xl);
  text-align: center;
}

footer p {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    gap: var(--space-lg);
  }
  
  .hero h1 {
    font-size: var(--text-2xl);
  }

  .home .hero {
    min-height: auto;
    padding-top: clamp(4rem, 16vw, 6rem);
    padding-bottom: clamp(4rem, 16vw, 6rem);
  }

  .home .hero h1 {
    font-size: clamp(2.75rem, 12vw, 4rem);
  }

  .home .hero-subtitle br {
    display: none;
  }
  
  section,
  .container {
    padding: var(--space-xl) var(--space-md);
  }
  
  .writing-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-methods {
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }

  .writing-card:hover {
    transform: none;
  }
}