/* ============================================
   Eric Rosenberg Portfolio
   styles.css
   ============================================ */

/* ============================================
   CSS Custom Properties - Dark Theme (Default)
   ============================================ */
:root {
  --color-bg: #0a0a0a;
  --color-fg: #e8e8e8;
  --color-fg-muted: #888888;
  --color-accent: #F57634 ;
  --color-accent-hover: #F47600;
  --color-border: #2a2a2a;
  --color-surface: #141414;
  --color-up: #3CB371;
  
  --font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 8rem;
  
  --max-width: 72ch;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ============================================
   Light Theme
   ============================================ */
[data-theme="light"] {
  --color-bg: #fafafa;
  --color-fg: #1a1a1a;
  --color-fg-muted: #666666;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e0e0e0;
  --color-surface: #ffffff;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@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;
  }
}

body {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-fg);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  transition: background-color var(--transition-base), color var(--transition-base);
}


i[data-tooltip] {
  cursor: help;
  position: relative;
  vertical-align: super;
  top: -0.1em;
  font-size: 80%;
  line-height: normal; 
}

i[data-tooltip]:hover::after {
  text-transform: none;
  position: absolute;
  bottom: -3rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-fg);
  color: var(--color-bg);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  z-index: 10;
  content: attr(data-tooltip);
}


.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   Skip Link (Accessibility)
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-bg);
  text-decoration: none;
  font-weight: 700;
  z-index: 1000;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-fg);
  outline-offset: 2px;
}

/* ============================================
   Focus States (Accessibility)
   ============================================ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

a:focus:not(:focus-visible) {
  outline: none;
}

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

@media (min-width: 768px) {
  .container {
    padding: var(--space-xl);
  }
}

/* ============================================
   Header
   ============================================ */
.header {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.header__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
}

.header__name {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.header__title {
  font-size: 0.875rem;
  color: var(--color-fg-muted);
  font-weight: 400;
  max-width: 50ch;
}

.header__location {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-fg-muted);
}

.header__location::before {
  content: '⌘';
  color: var(--color-accent);
}

/* ============================================
   Theme Toggle
   ============================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--color-fg);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--color-fg-muted);
  background-color: var(--color-surface);
}

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

.theme-toggle svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.theme-toggle:hover svg {
  transform: rotate(15deg);
}

.theme-toggle__icon--sun,
.theme-toggle__icon--moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: block;
}

[data-theme="light"] .theme-toggle__icon--moon {
  display: block;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.nav__link {
  color: var(--color-fg);
  text-decoration: none;
  font-size: 0.8125rem;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav__link--external::after {
  content: ' ↗';
  font-size: 0.75em;
  opacity: 0.6;
}

/* ============================================
   Stats Banner
   ============================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-md);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.stat {
  text-align: left;
}

.stat__value {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-fg);
  line-height: 1.2;
}

.stat__value--highlight {
  color: var(--color-accent);
}

.stat__label {
  font-size: 0.75rem;
  color: var(--color-fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-xs);
}

.up {
  color: var(--color-up);
}

/* ============================================
   Section
   ============================================ */
.section {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
  border-bottom: none;
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section__title {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-fg-muted);
}

.section__line {
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ============================================
   Experience Index
   ============================================ */
.experience-list {
  list-style: none;
}

.experience-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 640px) {
  .experience-item {
    grid-template-columns: 140px 1fr;
    gap: var(--space-lg);
  }
}

.experience-item:last-child {
  border-bottom: none;
}

.experience__dates {
  font-size: 0.8125rem;
  color: var(--color-fg-muted);
  font-variant-numeric: tabular-nums;
}

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

.experience__role {
  font-weight: 500;
  color: var(--color-fg);
}

.experience__company {
  color: var(--color-fg-muted);
  font-size: 0.875rem;
}

.experience__highlight {
  font-size: 0.8125rem;
  color: var(--color-accent);
  margin-top: var(--space-xs);
}

/* ============================================
   Skills Grid
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.skill-group__title {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-fg-muted);
  margin-bottom: var(--space-sm);
}

.skill-group__list {
  list-style: none;
  font-size: 0.875rem;
}

.skill-group__list li {
  padding: var(--space-xs) 0;
  color: var(--color-fg);
}

.skill-group__list li::before {
  content: '→ ';
  color: var(--color-fg-muted);
}

/* ============================================
   Contact
   ============================================ */
.contact {
  padding: var(--space-xl) 0 var(--space-2xl);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-fg);
  text-decoration: none;
  font-size: 0.9375rem;
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

.contact__link:hover,
.contact__link:focus {
  color: var(--color-accent);
}

.contact__link::before {
  content: attr(data-prefix);
  color: var(--color-fg-muted);
  font-size: 0.8125rem;
  min-width: 60px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer__text {
  font-size: 0.75rem;
  color: var(--color-fg-muted);
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  body {
    background: white;
    color: black;
  }
  
  .nav, .skip-link, .theme-toggle {
    display: none;
  }
  
  .section {
    break-inside: avoid;
  }
  
  a {
    color: inherit;
    text-decoration: underline;
  }
  
  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
  }
}

/* ============================================
   Loading Animation
   ============================================ */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    animation: fadeIn 0.6s ease forwards;
    opacity: 0;
  }
  
  .fade-in:nth-child(1) { animation-delay: 0.1s; }
  .fade-in:nth-child(2) { animation-delay: 0.2s; }
  .fade-in:nth-child(3) { animation-delay: 0.3s; }
  .fade-in:nth-child(4) { animation-delay: 0.4s; }
  
  @keyframes fadeIn {
    to { opacity: 1; }
  }
}