/* ==========================================
   CSS Variables - Design System
   ========================================== */
:root {
  /* Color System */
  --color-primary: #005A9C;           /* Link blue */
  --color-text-primary: #3D3D3D;      /* Main heading */
  --color-text-secondary: #4A4A4A;    /* Body text */
  --color-text-tertiary: #6B6B6B;     /* Subtitle */
  --color-background: #FFFFFF;        /* Main background */
  --color-sidebar-bg: #F5F5F5;        /* Sidebar background */
  --color-card-bg: #E8EEF2;           /* Contact card background */
  --color-border: #D0D0D0;            /* Borders */
  
  /* Typography System */
  --font-family-primary: 'Georgia', 'Times New Roman', serif;
  --font-family-secondary: 'Arial', 'Helvetica', sans-serif;
  
  --font-size-xl: 40px;               /* Main heading */
  --font-size-lg: 26px;               /* Subtitle */
  --font-size-md: 20px;               /* Section titles */
  --font-size-base: 16px;             /* Body text */
  --font-size-sm: 15px;               /* Contact info */
  --font-size-xs: 14px;               /* Small text */
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;
  
  /* Spacing System */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 40px;
  
  /* Layout */
  --sidebar-width: 320px;
  --container-max-width: 1200px;
  --content-padding: 50px;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Layout Container
   ========================================== */
.container {
  display: flex;
  max-width: var(--container-max-width);
  margin: 0 auto;
  gap: var(--spacing-3xl);
}

/* ==========================================
   Main Content Area
   ========================================== */
.main-content {
  flex: 1;
  padding: var(--content-padding);
  padding-right: 0;
  min-width: 0; /* Prevents flex item overflow */
}

/* Profile Header */
.profile-header {
  margin-bottom: var(--spacing-3xl);
}

.profile-name {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-sm);
}

.profile-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-tight);
}

/* About Section */
.about-section {
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-tight);
}

.about-content p {
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
  text-align: justify;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.external-link {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.icon-external {
  font-size: 0.85em;
  display: inline-block;
}

/* Emphasis */
em {
  font-style: italic;
}

/* ==========================================
   Sidebar
   ========================================== */
.sidebar {
  width: var(--sidebar-width);
  padding: var(--content-padding) var(--content-padding) var(--content-padding) 0;
  flex-shrink: 0;
}

/* Profile Image */
.profile-image {
  width: 100%;
  margin-bottom: var(--spacing-xl);
  overflow: hidden;
  border-radius: var(--border-radius-sm);
}

.profile-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Contact Card */
.contact-card {
  background-color: var(--color-card-bg);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
}

.contact-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-lg);
}

/* Contact Info */
.contact-info {
  margin-bottom: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

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

.contact-icon {
  font-size: var(--font-size-md);
  flex-shrink: 0;
  opacity: 0.7;
}

.contact-details {
  flex: 1;
}

.contact-name {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 2px;
  font-size: var(--font-size-sm);
}

.contact-role {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.contact-email {
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  word-break: break-word;
}

.contact-label {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  font-size: var(--font-size-xs);
  flex-shrink: 0;
  min-width: 50px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-size: var(--font-size-xs);
}

.orcid-icon {
  font-size: var(--font-size-sm);
}

/* Department Button */
.department-button {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.btn-department {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-align: center;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-department:hover {
  background-color: var(--color-primary);
  color: var(--color-background);
  border-color: var(--color-primary);
  text-decoration: none;
}

/* Address Sections */
.address-section,
.office-hours,
.postal-address {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.address-title,
.office-title,
.postal-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.address-text,
.office-text,
.postal-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  margin-bottom: 4px;
}

.address-text:last-child,
.office-text:last-child,
.postal-text:last-child {
  margin-bottom: 0;
}

/* ==========================================
   Responsive Design
   ========================================== */

/* Tablet */
@media (max-width: 1024px) {
  .container {
    gap: var(--spacing-2xl);
  }
  
  .main-content {
    padding: var(--spacing-2xl);
    padding-right: 0;
  }
  
  .sidebar {
    width: 280px;
    padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-2xl) 0;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .main-content {
    padding: var(--spacing-lg);
  }
  
  .sidebar {
    width: 100%;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
  }
  
  .profile-name {
    font-size: 32px;
  }
  
  .profile-title {
    font-size: 22px;
  }
  
  .about-content p {
    text-align: left;
  }
  
  .profile-image {
    max-width: 300px;
    margin: 0 auto var(--spacing-xl);
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --font-size-xl: 28px;
    --font-size-lg: 20px;
    --font-size-md: 18px;
    --font-size-base: 15px;
  }
  
  .main-content {
    padding: var(--spacing-md);
  }
  
  .sidebar {
    padding: 0 var(--spacing-md) var(--spacing-md);
  }
  
  .contact-card {
    padding: var(--spacing-md);
  }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
  body {
    background-color: white;
  }
  
  .container {
    max-width: 100%;
  }
  
  a {
    color: var(--color-text-primary);
    text-decoration: underline;
  }
  
  .btn-department {
    border: 1px solid var(--color-text-primary);
  }
}

/* ==========================================
   Accessibility Enhancements
   ========================================== */

/* Focus styles for keyboard navigation */
a:focus,
.btn-department:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text-primary: #000000;
    --color-text-secondary: #1a1a1a;
    --color-primary: #0000CC;
  }
  
  .btn-department {
    border-width: 2px;
  }
}