/* ==========================================================================
   CSS VARIABLES - Theme Properties
   ========================================================================== */

:root {
  /* Colors - Light Theme */
  --color-primary: #000000;
  --color-primary-hover: #1a1a1a;
  --color-text: #000000;
  --color-text-secondary: #333333;
  --color-background: #ffffff;
  --color-background-secondary: #ffffff;
  --color-border: #cccccc;
  --color-border-light: #eeeeee;
  --color-accent: #444444;
  
  /* Typography */
  --font-family-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --line-height-tight: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;
  
  /* Spacing */
  --spacing-unit: 0.25rem;
  --spacing-xs: calc(var(--spacing-unit) * 1);
  --spacing-sm: calc(var(--spacing-unit) * 2);
  --spacing-md: calc(var(--spacing-unit) * 3);
  --spacing-lg: calc(var(--spacing-unit) * 4);
  --spacing-xl: calc(var(--spacing-unit) * 6);
  --spacing-2xl: calc(var(--spacing-unit) * 8);
  --spacing-3xl: calc(var(--spacing-unit) * 12);
  
  /* Layout */
  --container-max-width: 56rem;
  --container-padding: var(--spacing-lg);
  --border-radius: 0.375rem;
  --border-radius-sm: 0.25rem;
  --border-radius-lg: 0.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
  --transition-slow: 0.4s ease-out;
  
  /* Link Properties */
  --link-underline-thickness: 1px;
  --link-underline-offset: 0.25em;
  --link-hover-underline-thickness: 2px;
  --link-focus-outline-width: 2px;
  --link-focus-outline-offset: 3px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #ffffff;
    --color-primary-hover: #e0e0e0;
    --color-text: #ffffff;
    --color-text-secondary: #cccccc;
    --color-background: #1a1a1a;
    --color-background-secondary: #1a1a1a;
    --color-border: #333333;
    --color-border-light: #2a2a2a;
    --color-accent: #bbbbbb;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  }
}

/* ==========================================================================
   BASE STYLES - Reset and Foundation
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 400;
  letter-spacing: -0.01em;
  scroll-behavior: smooth;
}

/* Improve focus accessibility */
*:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove default focus for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* ==========================================================================
   LAYOUT - Container and Grid System
   ========================================================================== */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Enhanced link identification within container */
.container a:not(.contact-link) {
  text-decoration: underline;
  text-decoration-thickness: var(--link-underline-thickness);
  text-underline-offset: var(--link-underline-offset);
  text-decoration-color: var(--color-text-secondary);
}

.container a:not(.contact-link):hover {
  text-decoration-color: var(--color-text);
  text-decoration-thickness: var(--link-hover-underline-thickness);
}

.container a:not(.contact-link):focus {
  text-decoration-color: var(--color-text);
  text-decoration-thickness: var(--link-hover-underline-thickness);
}

/* Improve keyboard navigation visibility */
.container a:focus-visible {
  outline: var(--link-focus-outline-width) solid var(--color-primary);
  outline-offset: var(--link-focus-outline-offset);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
}

/* ==========================================================================
   TYPOGRAPHY - Headings, Text, and Links
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
}

h2 {
  font-size: var(--font-size-2xl);
  font-weight: 500;
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 500;
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: var(--link-underline-thickness);
  text-underline-offset: var(--link-underline-offset);
  transition: all var(--transition-fast);
  border-radius: var(--border-radius-sm);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration-thickness: var(--link-hover-underline-thickness);
}

a:focus {
  color: var(--color-primary-hover);
  text-decoration-thickness: var(--link-hover-underline-thickness);
}

a:focus-visible {
  outline: var(--link-focus-outline-width) solid var(--color-primary);
  outline-offset: var(--link-focus-outline-offset);
  text-decoration: none;
}

ul {
  list-style: none;
}

li {
  margin-bottom: var(--spacing-xs);
}

/* ==========================================================================
   HEADER - Name, Title, and Contact Information
   ========================================================================== */

.header {
  background-color: transparent;
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.header .container {
  display: flex;
}

.information {
  margin: 0 auto;
}

.name {
  font-size: var(--font-size-4xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.title {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  width: 100%;
}

.contact-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  width: 100%;
  max-width: 20rem;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  font-weight: 400;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  width: 100%;
  min-height: 2.5rem;
}

.contact-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}

.contact-link:hover,
.contact-link:focus {
  color: var(--color-text);
  background-color: var(--color-background-secondary);
  border-color: var(--color-border-light);
  transform: translateY(-1px);
}

.contact-link:hover::after,
.contact-link:focus::after {
  width: calc(100% - var(--spacing-lg));
}

.contact-link:focus-visible {
  outline: var(--link-focus-outline-width) solid var(--color-primary);
  outline-offset: var(--link-focus-outline-offset);
  text-decoration: none;
  border-color: var(--color-border);
}

.contact-link:focus-visible::after {
  display: none;
}

.contact-link svg {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.contact-link:hover svg,
.contact-link:focus svg {
  opacity: 1;
}

/* ==========================================================================
   MAIN CONTENT - Sections and Layout
   ========================================================================== */

.main {
  padding: 0 0 var(--spacing-3xl);
}

.section {
  margin-bottom: var(--spacing-3xl);
}

.section:last-child {
  margin-bottom: 0;
}

.section h2 {
  color: var(--color-text);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   COMPONENTS - Specific Content Sections
   ========================================================================== */

/* Summary Section */
.summary-text {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  margin-bottom: 0;
}

/* Experience Section */
.experience-item {
  margin-bottom: var(--spacing-3xl);
  padding: 0;
  background-color: transparent;
  border: none;
}

.experience-item:last-child {
  margin-bottom: 0;
}

.experience-header {
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.job-title {
  color: var(--color-text);
  margin-bottom: 0;
  font-weight: 500;
  font-size: var(--font-size-lg);
}

.company {
  color: var(--color-text);
  font-weight: 400;
  margin-bottom: 0;
  font-size: var(--font-size-base);
}

.date-range {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-style: normal;
  font-weight: 400;
  font-feature-settings: 'tnum' on, 'lnum' on;
}

.responsibilities {
  list-style: none;
  padding-left: 0;
  margin-top: var(--spacing-md);
}

.responsibilities li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-base);
}

.responsibilities li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-text-secondary);
  font-weight: normal;
  font-size: 1.2em;
}

/* Education Section */
.education-item {
  padding: 0;
  background-color: transparent;
  border: none;
}

.degree {
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.university {
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.graduation-date {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-style: italic;
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
}

.skill-category {
  padding: 0;
  background-color: transparent;
  border: none;
}

.skill-category-title {
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-lg);
  font-weight: 500;
}

.skill-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.skill-list li {
  color: var(--color-text);
  font-size: var(--font-size-base);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-sm);
  font-weight: 400;
}

/* Projects Section */
.project-item {
  margin-bottom: var(--spacing-2xl);
  padding: 0;
  background-color: transparent;
  border: none;
}

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

.project-title {
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.project-description {
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* Workspace Section */
.workspace-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-lg);
  background-color: transparent;
  border-radius: var(--border-radius-lg);
}

.workspace-illustration svg {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-sm);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

/* ==========================================================================
   FOOTER - Copyright and Credits
   ========================================================================== */

.footer {
  background-color: transparent;
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-2xl);
}

.footer p {
  color: var(--color-text-secondary);
  text-align: center;
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* ==========================================================================
   RESPONSIVE DESIGN - Mobile First Approach
   ========================================================================== */

/* Tablet (768px and up) */
@media (min-width: 48rem) {
  .header {
    padding: var(--spacing-3xl) 0;
  }
  
  .name {
    font-size: var(--font-size-4xl);
  }
  
  .title {
    font-size: var(--font-size-2xl);
  }
  
  .contact-info {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2xl);
    width: 100%;
  }
  
  .contact-group {
    flex-direction: row;
    gap: var(--spacing-lg);
    align-items: center;
    width: auto;
    max-width: none;
  }
  
  .contact-link {
    width: auto;
    min-height: auto;
    justify-content: center;
  }
  
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .main {
    padding: 0 0 var(--spacing-3xl);
  }
  
  .section {
    margin-bottom: var(--spacing-3xl);
  }
  
  .summary-text {
    font-size: var(--font-size-lg);
    max-width: 60ch;
  }
  
  .experience-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--spacing-lg);
  }
  
  .experience-header .date-range {
    flex-shrink: 0;
  }
}

/* Desktop (1024px and up) */
@media (min-width: 64rem) {
  .container {
    padding: 0 var(--spacing-xl);
  }
  
  .skills-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .contact-info {
    justify-content: center;
    gap: var(--spacing-2xl);
    width: 100%;
  }
  
  .section h2 {
    font-size: var(--font-size-lg);
  }
  
  .summary-text {
    font-size: var(--font-size-xl);
    max-width: 65ch;
  }
  
  .experience-item,
  .education-item,
  .skill-category,
  .project-item {
    transition: none;
  }
}

/* Large Desktop (1280px and up) */
@media (min-width: 80rem) {
  .container {
    padding: 0 var(--spacing-xl);
  }
  
  .name {
    font-size: 3rem;
  }
  
  .title {
    font-size: var(--font-size-2xl);
  }
}

/* ==========================================================================
   ACCESSIBILITY - Focus States and High Contrast
   ========================================================================== */

/* Mobile-first improvements */
@media (max-width: 47.9375rem) {
  .contact-link {
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 44px;
    justify-content: center;
    width: 100%;
    max-width: 18rem;
    margin: 0 auto;
  }
}

/* Enhanced focus states for better keyboard navigation */
.contact-link:focus,
button:focus,
a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-border-light: #000000;
    --color-text-secondary: #000000;
    --color-accent: #000000;
  }
  
  .section h2 {
    border-bottom-width: 2px;
  }
  
  .skill-list li {
    background-color: transparent;
    border: 2px solid #000000;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    transition-duration: 0.01ms;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* ==========================================================================
   PRINT STYLES - Optimized for PDF Generation
   ========================================================================== */

@page {
  size: A4;
  margin: 0.3in;
  /* Remove browser headers and footers */
  @top-left { content: ""; }
  @top-center { content: ""; }
  @top-right { content: ""; }
  @bottom-left { content: ""; }
  @bottom-center { content: ""; }
  @bottom-right { content: ""; }
}

@media print {
  /* Print font size variables */
  :root {
    --print-base-font-size: 12px;
    --print-line-height: 1.3;
  }
  
  /* Hide browser generated headers/footers */
  
  html,
  body {
    font-size: var(--print-base-font-size);
    line-height: var(--print-line-height);
    color: #000 !important;
    background: #fff !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  
  * {
    color: #000 !important;
    background: #fff !important;
    box-shadow: none !important;
    transform: none !important;
    text-shadow: none !important;
  }
  
  /* Override container to use full width for print */
  .container {
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  body .header {
    border-bottom: 1px solid #000;
    padding: 0.2rem 0;
    text-align: center;
    margin-bottom: 0.3rem;
  }
  
  body .header .name {
    font-size: calc(var(--print-base-font-size) * 1.5);
    margin-bottom: 0.1rem;
    font-weight: 600;
  }
  
  body .header .title {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.2rem;
  }
  
  body .header .contact-info {
    margin-bottom: 0.2rem;
    flex-direction: row;
    justify-content: center;
    gap: 1.5rem;
  }
  
  body .header .contact-group {
    flex-direction: row;
    gap: 0.8rem;
  }
  
  body .header .contact-link {
    font-size: var(--print-base-font-size);
    border: none;
    background: none;
    text-decoration: none;
    padding: 0;
    min-height: auto;
  }
  
  body .header .contact-link::after {
    display: none;
  }
  
  body .header .contact-link svg {
    display: none;
  }
  
  body .container a {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    color: #000;
  }
  
  body .main {
    padding: 0.2rem 0;
  }
  
  body .main .section {
    margin-bottom: 0.8rem;
    break-inside: avoid;
  }
  
  body .main .section h2 {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.4rem;
    padding-bottom: 0.15rem;
    border-bottom: 1px solid #000;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
  }
  
  body .main .summary-text {
    font-size: var(--print-base-font-size);
    line-height: 1.4;
    margin-bottom: 0.4rem;
  }
  
  body .main .experience-item {
    margin-bottom: 0.6rem;
    break-inside: avoid;
  }
  
  body .main .experience-header {
    margin-bottom: 0.2rem;
  }
  
  body .main .job-title {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.1rem;
    font-weight: 600;
  }
  
  body .main .company {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.1rem;
  }
  
  body .main .date-range {
    font-size: var(--print-base-font-size);
  }
  
  body .main .responsibilities {
    margin-top: 0.2rem;
  }
  
  body .main .responsibilities li {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.1rem;
    padding-left: 0.7rem;
    line-height: 1.3;
  }
  
  body .main .skills-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
  }
  
  body .main .skill-category-title {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.15rem;
    font-weight: 600;
  }
  
  body .main .skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  
  body .main .skill-list li {
    font-size: var(--print-base-font-size);
    padding: 0.15rem 0.4rem;
    border: 1px solid #000;
    border-radius: 0.2rem;
    background: #fff;
    color: #000;
  }
  
  body .main .education-item {
    margin-bottom: 0.4rem;
  }
  
  body .main .degree {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.1rem;
    font-weight: 600;
  }
  
  body .main .university {
    font-size: var(--print-base-font-size);
    margin-bottom: 0.1rem;
  }
  
  body .main .graduation-date {
    font-size: var(--print-base-font-size);
  }
  
  body .workspace-illustration {
    margin: 0.3rem 0;
    padding: 0;
  }
  
  body .workspace-illustration svg {
    max-width: 100%;
    height: auto;
    filter: none;
    border-radius: 0;
  }
  
  body .footer {
    display: none;
  }
}