/* ==========================================================================
   Diego A. Canales - Academic Website
   Clean, professional design for economics research
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1a5f7a;
  --color-primary-dark: #0d3d4d;
  --color-accent: #c23a2b;
  --color-text: #333;
  --color-text-light: #666;
  --color-bg: #fff;
  --color-bg-alt: #f8f9fa;
  --color-border: #e0e0e0;
  
  --font-sans: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Source Serif Pro', Georgia, serif;
  
  --max-width: 900px;
  --spacing: 1.5rem;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; border-bottom: 1px solid var(--color-border); padding-bottom: 0.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

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

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

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-title:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text-light);
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom-color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.site-content {
  flex: 1;
  padding: 2rem 0;
}

/* --------------------------------------------------------------------------
   Profile / Home Page
   -------------------------------------------------------------------------- */
.profile-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  align-items: start;
}

.profile-image img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.profile-content .lead {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.social-links a {
  font-size: 1.5rem;
  color: var(--color-text-light);
  transition: color 0.2s ease;
}

.social-links a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Research / Publications
   -------------------------------------------------------------------------- */
.publication {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.publication:last-child {
  border-bottom: none;
}

.publication h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.publication .authors {
  color: var(--color-text-light);
  margin-bottom: 0.25rem;
}

.publication .venue {
  margin-bottom: 0.75rem;
}

.publication .abstract {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.publication .links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  transition: all 0.2s ease;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

.btn.disabled {
  color: var(--color-text-light);
  border-color: var(--color-border);
  cursor: not-allowed;
}

.btn.disabled:hover {
  background-color: var(--color-bg);
  color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   CV Page
   -------------------------------------------------------------------------- */
.cv-download {
  margin-bottom: 2rem;
}

.last-updated {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-top: 2rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  margin-top: 2rem;
}

.site-footer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-align: center;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .profile-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .profile-image {
    max-width: 200px;
    margin: 0 auto;
  }
  
  .profile-content h3,
  .profile-content ul {
    text-align: left;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    gap: 0;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-links li {
    margin: 0;
  }
  
  .nav-links a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: none;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer,
  .btn {
    display: none;
  }
  
  body {
    font-size: 12pt;
  }
  
  a {
    color: var(--color-text);
  }
}