/* 
 * Apple Design System
 * Typography and Color following Apple's Human Interface Guidelines
 */

/* ============================================
   CSS Variables - Apple Design System
   ============================================ */
:root {
  /* Colors */
  --color-primary-text: #1d1d1f;
  --color-body-text: #424245;
  --color-secondary-text: #86868b;
  --color-link: #0071e3;
  --color-link-hover: #0071e3;
  --color-link-active: #0051a2;
  --color-border: rgba(0, 113, 227, 0.3);
  --color-highlight-bg: rgba(0, 113, 227, 0.05);
  --color-highlight-bg-strong: rgba(0, 113, 227, 0.08);
  --color-highlight-border: #0071e3;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-size-body: 17px;
  --font-size-small: 15px;
  --font-size-h1: 48px;
  --font-size-h2: 34px;
  --font-size-h3: 28px;
  --font-size-name: 56px;
  --line-height-body: 1.47059;
  --line-height-h1: 1.08349;
  --line-height-h2: 1.11765;
  --line-height-h3: 1.14286;
  --line-height-name: 1.07143;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --letter-spacing-body: -0.022em;
  --letter-spacing-heading: -0.003em;
  --letter-spacing-name: -0.005em;
  
  /* Spacing */
  --spacing-xs: 0.25em;
  --spacing-sm: 0.5em;
  --spacing-md: 1em;
  --spacing-lg: 1.25em;
  --spacing-xl: 1.5em;
  --spacing-2xl: 2em;
  --spacing-3xl: 2.5em;
  --spacing-4xl: 3em;
  
  /* Layout */
  --max-width-content: 1200px;
  --padding-content: 40px;
  --padding-content-mobile: 20px;
  --border-radius: 4px;
}

/* ============================================
   Typography - SF Pro Font Stack
   ============================================ */

body {
  font-family: var(--font-family) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
}

.page__content,
.page .page__content,
.page__inner .page__content,
.article .page__content {
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  color: var(--color-body-text) !important;
  max-width: var(--max-width-content) !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding: 0 var(--padding-content) !important;
  width: 100% !important;
  box-sizing: border-box !important;
  font-weight: var(--font-weight-regular) !important;
  letter-spacing: var(--letter-spacing-body) !important;
}

/* Profile Header - Prominent Name and Contact */
.profile-header {
  text-align: center;
  margin: var(--spacing-4xl) 0 var(--spacing-3xl) 0;
}

.profile-name {
  font-size: var(--font-size-name) !important;
  font-weight: var(--font-weight-bold) !important;
  line-height: var(--line-height-name) !important;
  letter-spacing: var(--letter-spacing-name) !important;
  color: var(--color-primary-text) !important;
  margin: 0 0 var(--spacing-md) 0 !important;
  padding: 0 !important;
  border: none !important;
}

.contact-info {
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  color: var(--color-body-text) !important;
  margin-top: var(--spacing-sm);
  word-spacing: var(--spacing-xs);
}

.contact-info a {
  color: var(--color-link) !important;
  text-decoration: none !important;
  border-bottom: 1px solid var(--color-border) !important;
  transition: border-color 0.2s ease, color 0.2s ease !important;
  font-weight: var(--font-weight-regular) !important;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.contact-info a:hover {
  border-bottom-color: var(--color-link-hover) !important;
  color: var(--color-link-hover) !important;
}

.contact-info a:active {
  color: var(--color-link-active) !important;
}

.contact-icon {
  flex-shrink: 0;
  vertical-align: middle;
  width: 16px;
  height: 16px;
}

.contact-link:hover .contact-icon {
  opacity: 0.8;
}

.contact-separator {
  color: var(--color-secondary-text) !important;
  margin: 0 var(--spacing-xs);
}

/* Profile Image - Minimal (if used) */
.profile-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: none;
  box-shadow: none;
  transition: opacity 0.3s ease;
}

.profile-image:hover {
  opacity: 0.85;
}

/* Paragraph spacing */
.page__content p {
  margin-bottom: var(--spacing-xl) !important;
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  color: var(--color-body-text) !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Headings - Apple Typography Scale */
.page__content h1:not(.profile-name) { 
  font-size: var(--font-size-h1) !important; 
  font-weight: var(--font-weight-bold) !important;
  line-height: var(--line-height-h1) !important;
  margin-top: var(--spacing-4xl) !important;
  margin-bottom: var(--spacing-sm) !important;
  letter-spacing: var(--letter-spacing-heading) !important;
  border-bottom: none !important;
  padding-bottom: 0 !important;
  color: var(--color-primary-text) !important;
}

.page__content h2 { 
  font-size: var(--font-size-h2) !important;
  font-weight: var(--font-weight-bold) !important;
  line-height: var(--line-height-h2) !important;
  margin-top: var(--spacing-3xl) !important;
  margin-bottom: var(--spacing-md) !important;
  letter-spacing: var(--letter-spacing-heading) !important;
  color: var(--color-primary-text) !important;
  border-bottom: none !important;
  padding-bottom: 0 !important;
}

/* First section after profile header */
.page__content h2:first-of-type {
  margin-top: var(--spacing-2xl) !important;
}

.page__content h3 { 
  font-size: var(--font-size-h3) !important;
  font-weight: var(--font-weight-semibold) !important;
  line-height: var(--line-height-h3) !important;
  margin-top: var(--spacing-2xl) !important;
  margin-bottom: var(--spacing-sm) !important;
  letter-spacing: var(--letter-spacing-heading) !important;
  color: var(--color-primary-text) !important;
}

/* Common Item Styles - Base */
.item-base {
  margin-bottom: var(--spacing-md);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
}

.item-base strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

/* Education - Apple style */
.education-item {
  margin-bottom: var(--spacing-md);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  color: var(--color-body-text) !important;
}

.education-item strong {
  color: var(--color-primary-text) !important;
  font-size: var(--font-size-body) !important;
  font-weight: var(--font-weight-semibold) !important;
}

.education-period {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Publications - Apple style */
.publication-item {
  margin-bottom: var(--spacing-lg);
  padding: 0;
  background-color: transparent;
  border: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.publication-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.publication-item em {
  color: var(--color-secondary-text) !important;
  font-style: normal;
  font-weight: var(--font-weight-regular) !important;
}

/* Publication Highlight - Nature Communications */
.publication-highlight {
  padding: var(--spacing-md) !important;
  background-color: var(--color-highlight-bg) !important;
  border-left: 3px solid var(--color-highlight-border) !important;
  border-radius: var(--border-radius) !important;
}

.publication-highlight.nature-comm {
  background-color: var(--color-highlight-bg-strong) !important;
  border-left-color: var(--color-highlight-border) !important;
}

/* Publication Links with Icons */
.pub-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin: 0 var(--spacing-xs);
}

.link-icon {
  font-size: 0.9em;
  line-height: 1;
}

/* External Link Icon */
.page__content a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.85em;
  opacity: 0.7;
  margin-left: var(--spacing-xs);
}

.contact-info a[target="_blank"]::after {
  display: none; /* Don't show icon for contact links */
}

.pub-link[target="_blank"]::after {
  display: none; /* Don't show icon for publication links (already have icons) */
}

/* Citation Count */
.citation-count {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
  font-style: italic;
  margin-left: var(--spacing-xs);
}

/* Experience - Apple style */
.experience-item {
  margin-bottom: var(--spacing-md);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
}

.experience-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

.experience-period {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Patent - Apple style */
.patent-item {
  margin-bottom: var(--spacing-lg);
  padding: 0;
  background-color: transparent;
  border: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
}

.patent-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

/* Presentation - Apple style */
.presentation-item {
  margin-bottom: var(--spacing-lg);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.presentation-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

.presentation-venue {
  color: var(--color-secondary-text) !important;
  font-weight: var(--font-weight-regular) !important;
}

.presentation-type {
  color: var(--color-secondary-text) !important;
  font-weight: var(--font-weight-regular) !important;
}

.presentation-period {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Recognition - Apple style */
.recognition-item {
  margin-bottom: var(--spacing-md);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
}

.recognition-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

/* Award - Apple style */
.award-item {
  margin-bottom: var(--spacing-md);
  padding: 0;
  background-color: transparent;
  border-left: none;
  border-radius: 0;
  line-height: var(--line-height-body) !important;
  font-size: var(--font-size-body) !important;
  color: var(--color-body-text) !important;
}

.award-item strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

.award-period {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Lists - Apple style */
.page__content ul, 
.page__content ol {
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  margin-bottom: var(--spacing-xl) !important;
  padding-left: var(--spacing-xl) !important;
  color: var(--color-body-text) !important;
}

.page__content li {
  margin-bottom: var(--spacing-md) !important;
  color: var(--color-body-text) !important;
  font-weight: var(--font-weight-regular) !important;
}

.page__content li strong {
  color: var(--color-primary-text) !important;
  font-weight: var(--font-weight-semibold) !important;
}

/* Links - Apple Blue */
.page__content a {
  color: var(--color-link) !important;
  text-decoration: none !important;
  border-bottom: 1px solid var(--color-border) !important;
  transition: border-color 0.2s ease, color 0.2s ease !important;
  font-weight: var(--font-weight-regular) !important;
}

.page__content a:hover {
  border-bottom-color: var(--color-link-hover) !important;
  color: var(--color-link-hover) !important;
}

.page__content a:active {
  color: var(--color-link-active) !important;
}

/* Blockquotes - Apple style */
.page__content blockquote {
  font-size: var(--font-size-body) !important;
  line-height: var(--line-height-body) !important;
  color: var(--color-secondary-text) !important;
  border-left: 1px solid #d2d2d7 !important;
  padding-left: var(--spacing-md) !important;
  margin: var(--spacing-2xl) 0 !important;
  font-style: normal !important;
  font-weight: var(--font-weight-regular) !important;
}

/* Author Profile - Apple style */
.author__content {
  color: var(--color-secondary-text) !important;
  font-size: var(--font-size-small) !important;
  font-weight: var(--font-weight-regular) !important;
  line-height: var(--line-height-body) !important;
}

/* Sidebar */
@media (min-width: 80em) {
  .sidebar {
    width: 240px !important;
  }
  
  .page__content {
    max-width: var(--max-width-content) !important;
  }
}

/* Compact whitespace */
.page__content > * {
  margin-bottom: var(--spacing-md) !important;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --padding-content: var(--padding-content-mobile);
  }
  
  .profile-name {
    font-size: 40px !important;
    line-height: 1.1 !important;
  }
  
  .contact-info {
    font-size: var(--font-size-small) !important;
    line-height: 1.4 !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }
  
  .contact-info a {
    display: inline-block;
    margin: 0;
  }
  
  .contact-separator {
    display: none;
  }
  
  .profile-image {
    width: 140px;
    height: 140px;
  }
  
  .experience-header,
  .publication-header {
    flex-direction: column;
  }
  
  .experience-period {
    margin-top: 0;
  }
  
  .page__content {
    padding: 0 var(--padding-content-mobile) !important;
  }
  
  .page__content h2 {
    margin-top: var(--spacing-4xl) !important;
  }
}