/* Design Tokens / CSS Variables */
:root {
  /* Enable light/dark mode detection */
  color-scheme: light dark;

  /* Colors - Light Mode */
  --color-primary: #8B2635;        /* Dark burgundy */
  --color-primary-light: #A63446;  /* Lighter burgundy for hover states */
  --color-accent: #C44E5E;         /* Accent burgundy/red */

  --color-neutral-darkest: #1a1a1a;
  --color-neutral-dark: #4a4a4a;
  --color-neutral-medium: #717171;
  --color-neutral-light: #e5e5e5;
  --color-neutral-lightest: #f8f8f8;
  --color-white: #ffffff;

  /* Dark Mode Colors */
  --color-neutral-darkest-dark: #f0f0f0;
  --color-neutral-dark-dark: #d0d0d0;
  --color-neutral-medium-dark: #a0a0a0;
  --color-neutral-light-dark: #3a3a3a;
  --color-neutral-lightest-dark: #2a2a2a;
  --color-white-dark: #1a1a1a;

  /* Semantic colors using light-dark() */
  --color-text: light-dark(var(--color-neutral-darkest), var(--color-neutral-darkest-dark));
  --color-text-muted: light-dark(var(--color-neutral-medium), var(--color-neutral-medium-dark));
  --color-background: light-dark(var(--color-white), var(--color-white-dark));
  --color-background-alt: light-dark(var(--color-neutral-lightest), var(--color-neutral-lightest-dark));
  --color-border: light-dark(var(--color-neutral-light), var(--color-neutral-light-dark));
  --color-surface: light-dark(#ffffff, #252525);

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-small: 0.875rem;
  --font-size-large: 1.125rem;
  --font-size-xlarge: 1.5rem;
  --font-size-xxlarge: 2.25rem;
  --font-size-xxxlarge: 2.75rem;
  --line-height-base: 1.6;
  --line-height-tight: 1.3;
  --line-height-tighter: 1.1;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Layout */
  --max-width: 1000px;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;
  --border-radius-circle: 50%;

  /* Shadows - using light-dark() */
  --shadow-sm: light-dark(0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.3));
  --shadow-md: light-dark(0 4px 6px rgba(0, 0, 0, 0.07), 0 4px 6px rgba(0, 0, 0, 0.25));
  --shadow-lg: light-dark(0 10px 15px rgba(0, 0, 0, 0.1), 0 10px 15px rgba(0, 0, 0, 0.4));
  --shadow-accent: light-dark(0 4px 12px rgba(139, 38, 53, 0.15), 0 4px 12px rgba(139, 38, 53, 0.3));

  /* Transitions */
  --transition-speed: 0.2s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  background-image: light-dark(
    linear-gradient(to bottom, var(--color-neutral-lightest) 0%, var(--color-white) 400px),
    linear-gradient(to bottom, var(--color-neutral-lightest-dark) 0%, var(--color-white-dark) 400px)
  );
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xxl) var(--spacing-md);
}

/* Hero Section */
.hero {
  margin-bottom: var(--spacing-xxl);
  padding-bottom: var(--spacing-xxl);
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
  border-radius: 2px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-content {
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xxl);
    text-align: left;
  }
}

.hero-left {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.profile-photo {
  width: 220px;
  height: 220px;
  border-radius: var(--border-radius-circle);
  object-fit: cover;
  border: 5px solid var(--color-surface);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-speed) var(--transition-ease),
              box-shadow var(--transition-speed) var(--transition-ease);
}

.profile-photo:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-accent);
}

.hero-right {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: center;
}

@media (min-width: 768px) {
  .hero-right {
    text-align: left;
  }
}

.business-name {
  font-size: var(--font-size-xxxlarge);
  font-weight: 800;
  line-height: var(--line-height-tighter);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-xs);
}

/* Fallback for browsers that don't support background-clip */
@supports not (background-clip: text) {
  .business-name {
    color: var(--color-primary);
    background: none;
    -webkit-text-fill-color: unset;
  }
}

.hero-right h1 {
  font-size: var(--font-size-xlarge);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.role {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: var(--font-size-small);
}

.bio {
  color: var(--color-text-muted);
  font-size: var(--font-size-large);
  line-height: 1.7;
  margin-top: var(--spacing-sm);
}

/* Icon Links */
.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

@media (min-width: 768px) {
  .links {
    justify-content: flex-start;
  }
}

.icon-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  color: light-dark(var(--color-neutral-dark), var(--color-neutral-dark-dark));
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed) var(--transition-ease);
  min-width: 120px;
  border: 2px solid transparent;
}

.icon-link:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.icon-link svg {
  width: 36px;
  height: 36px;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.icon-link:hover svg {
  transform: scale(1.1);
}

.icon-label {
  font-size: var(--font-size-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Publications Section */
.publications {
  margin-top: var(--spacing-xxl);
  padding: var(--spacing-xl) var(--spacing-lg);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.publications h2 {
  font-size: var(--font-size-xlarge);
  margin-bottom: var(--spacing-xl);
  color: var(--color-text);
  font-weight: 700;
  position: relative;
  padding-bottom: var(--spacing-md);
}

.publications h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.publications-list {
  list-style: none;
}

.publication-item {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--color-background-alt);
  border-radius: var(--border-radius-sm);
  border-left: 4px solid var(--color-border);
  transition: all var(--transition-speed) var(--transition-ease);
}

.publication-item:hover {
  border-left-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

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

.publication-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

.publication-title a {
  color: var(--color-text);
  text-decoration: none;
  background-image: linear-gradient(to right, var(--color-accent), var(--color-accent));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 2px;
  transition: background-size var(--transition-speed) var(--transition-ease);
  padding-bottom: 2px;
}

.publication-title a:hover {
  background-size: 100% 2px;
  color: var(--color-primary);
}

.publication-year {
  display: inline-block;
  font-size: var(--font-size-small);
  color: light-dark(var(--color-white), var(--color-white-dark));
  background-color: var(--color-primary);
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.02em;
}

.publication-description {
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
  line-height: 1.7;
}

.publication-description p {
  margin: 0;
}

/* Contact Page */
.contact-page {
  max-width: 600px;
  margin: 0 auto;
}

.contact-header {
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.contact-header h1 {
  font-size: var(--font-size-xxlarge);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  color: var(--color-text);
}

.back-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.back-link:hover {
  color: var(--color-primary-light);
}

.contact-form {
  background-color: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: light-dark(var(--color-neutral-dark), var(--color-neutral-dark-dark));
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  transition: all var(--transition-speed) var(--transition-ease);
  background-color: var(--color-surface);
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: light-dark(
    0 0 0 3px rgba(139, 38, 53, 0.1),
    0 0 0 3px rgba(139, 38, 53, 0.2)
  );
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-button {
  background-color: var(--color-primary);
  color: light-dark(var(--color-white), var(--color-white-dark));
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-ease);
  box-shadow: var(--shadow-sm);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: var(--font-size-small);
}

.submit-button:hover {
  background-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.submit-button:active {
  transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 767px) {
  :root {
    --font-size-xxxlarge: 2rem;
    --font-size-xxlarge: 1.75rem;
    --font-size-xlarge: 1.375rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
  }

  main {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .profile-photo {
    width: 180px;
    height: 180px;
  }

  .hero-right {
    text-align: center;
  }

  .icon-link {
    min-width: 100px;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .icon-link svg {
    width: 32px;
    height: 32px;
  }

  .publications {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .publication-item {
    padding: var(--spacing-md);
  }

  .contact-form {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-xxxlarge: 1.75rem;
    --font-size-xxlarge: 1.5rem;
    --spacing-xl: 1.5rem;
    --spacing-xxl: 2rem;
  }

  .profile-photo {
    width: 150px;
    height: 150px;
  }

  .bio {
    font-size: var(--font-size-base);
  }

  .icon-link {
    min-width: 90px;
  }
}