/**
 * Mahir Kothary Website - Main Stylesheet
 * Consolidated CSS for all pages
 */

/* ========================================
   CSS Variables (Design System)
   ======================================== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --text-primary: #e6edf3;
  --text-secondary: #7d8590;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --border: #30363d;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* ========================================
   Layout Components
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.header {
  text-align: center;
  margin-bottom: 3rem;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.header .nav {
  margin-top: 1.5rem;
}

.header .nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 1rem;
  font-weight: 400;
  transition: color 0.2s;
}

.header .nav a:hover {
  color: var(--accent);
}

.page-title {
  text-align: center;
  margin-bottom: 3rem;
}

.page-title h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--text-primary);
}

.footer {
  text-align: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.social-links {
  margin-bottom: 2rem;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 2rem;
  margin: 0 1rem;
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--accent);
}

.email-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.email-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ========================================
   Home Page Specific Styles
   ======================================== */
.profile {
  text-align: center;
  margin-bottom: 3rem;
}

.profile img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin-bottom: 1.5rem;
  border: 3px solid var(--border);
}

.intro {
  margin-bottom: 3rem;
}

.intro h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.intro p {
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 1rem;
}

.intro a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.intro a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.personal {
  margin-bottom: 3rem;
}

.personal h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.personal p {
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 1rem;
}

.personal a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.personal a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ========================================
   Timeline Styles (Home Page)
   ======================================== */
.timeline-section {
  margin-bottom: 3rem;
}

.timeline-section h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 2rem;
}

.timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  padding: 3rem 0;
  max-width: 100%;
  overflow-x: auto;
  min-height: 200px;
}

.timeline-line {
  position: absolute;
  top: 8%;
  left: 8%;
  right: 80px;
  height: 2px;
  background: var(--border);
  z-index: 1;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.timeline-marker-dot {
  width: 12px;
  height: 12px;
  background: var(--border);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  position: relative;
  z-index: 2;
}

.timeline-marker-dot.most-recent {
  background: var(--accent);
  border-color: var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-item {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 200px;
  height: 150px;
  text-align: center;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  background: var(--bg-secondary);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.timeline-marker {
  display: none;
}

.timeline-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(88, 166, 255, 0.1);
}

.timeline-item.most-recent {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
  box-shadow: 0 4px 20px rgba(88, 166, 255, 0.15);
}

/* Experience type color highlighting (Home page) */
.timeline-item.work {
  border-color: #58a6ff;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
}

.timeline-item.education {
  border-color: #7c3aed;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.timeline-item.leadership {
  border-color: #f59e0b;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.timeline-content-above {
  text-align: center;
  margin-bottom: 0.5rem;
}

.timeline-content-below {
  text-align: center;
}

.timeline-date {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  display: inline-block;
}

.timeline-title {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
  line-height: 1.2;
  margin-top: 0.5rem;
}

.timeline-org {
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.3;
}

.timeline-org a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.timeline-org a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Timeline navigation elements */
.timeline-arrow {
  position: relative;
  z-index: 2;
}

.timeline-arrow-link {
  color: var(--bg-primary);
  font-size: 1.2rem;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-arrow-link:hover {
  background: var(--accent-hover);
  transform: translateX(3px);
}

.timeline-mobile-button {
  display: none;
  text-align: center;
  margin-top: 2rem;
}

.timeline-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--accent);
  color: var(--bg-primary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: background 0.2s;
}

.timeline-button:hover {
  background: var(--accent-hover);
}

/* ========================================
   Work Page Timeline Styles
   ======================================== */
.timeline.work-timeline {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 0;
  display: block;
}

.timeline.work-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: var(--border);
  top: 0;
}

.timeline.work-timeline .timeline-item {
  position: relative;
  margin: 3rem 0;
  width: 100%;
  height: auto;
  max-width: none;
  min-width: auto;
  display: block;
  border: none;
  background: transparent;
  padding: 0;
}

.timeline.work-timeline .timeline-item:nth-child(odd) .timeline-content {
  margin-left: 0;
  margin-right: 52%;
  text-align: right;
}

.timeline.work-timeline .timeline-item:nth-child(even) .timeline-content {
  margin-left: 52%;
  margin-right: 0;
  text-align: left;
}

.timeline.work-timeline .timeline-marker {
  display: flex;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 24px;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 0 0 4px var(--border);
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--bg-primary);
}

.timeline.work-timeline .timeline-marker.education {
  background: #7c3aed;
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.2);
}

.timeline.work-timeline .timeline-marker.leadership {
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

.timeline-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 25px rgba(88, 166, 255, 0.15);
}

/* Content box color highlighting (Work page) */
.timeline-content.work {
  border-color: rgba(88, 166, 255, 0.3);
  border-width: 4px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
}

.timeline-content.education {
  border-color: rgba(124, 58, 237, 0.3);
  border-width: 4px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.timeline-content.leadership {
  border-color: rgba(245, 158, 11, 0.3);
  border-width: 4px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.timeline-content::before {
  content: '';
  position: absolute;
  top: 30px;
  width: 0;
  height: 0;
  border: 15px solid transparent;
}

.timeline.work-timeline .timeline-item:nth-child(odd) .timeline-content::before {
  right: -30px;
  border-left-color: var(--border);
}

.timeline.work-timeline .timeline-item:nth-child(even) .timeline-content::before {
  left: -30px;
  border-right-color: var(--border);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.timeline.work-timeline .timeline-item:nth-child(odd) .timeline-header {
  flex-direction: row-reverse;
}

.timeline-company {
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.timeline-logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
  border-radius: 8px;
  background: var(--bg-primary);
  padding: 8px;
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 1rem;
}

.timeline.work-timeline .timeline-item:nth-child(odd) .timeline-meta {
  flex-direction: row-reverse;
  text-align: right;
}

.timeline-location {
  font-weight: 500;
}

.timeline-dates {
  color: var(--accent);
  font-weight: 500;
}

.timeline-description {
  color: var(--text-primary);
  line-height: 1.7;
}

.timeline.work-timeline .timeline-item:nth-child(odd) .timeline-description {
  text-align: right;
}

.timeline.work-timeline .timeline-item:nth-child(even) .timeline-description {
  text-align: left;
}

.timeline-description p {
  margin-bottom: 1rem;
}

.timeline-description p:last-child {
  margin-bottom: 0;
}

.timeline-description a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.timeline-description a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ========================================
   About Page Styles
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.about-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  transition: border-color 0.2s;
}

.about-card:hover {
  border-color: var(--accent);
}

.about-card .icon {
  color: var(--accent);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.about-card h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.about-card h4 {
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.about-card p {
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

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

.about-card a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.about-card a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.about-card em {
  color: var(--text-secondary);
  font-style: italic;
}

.wide-card {
  grid-column: 1 / -1;
}

.activities-section {
  margin-top: 2rem;
}

.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.certificate-img {
  max-width: 200px;
  border-radius: 8px;
  margin: 1rem 0;
  border: 2px solid var(--border);
  transition: border-color 0.2s;
}

.certificate-img:hover {
  border-color: var(--accent);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  .header .nav a {
    margin: 0 0.5rem;
    font-size: 0.9rem;
  }
  
  .profile img {
    width: 120px;
    height: 120px;
  }
  
  /* Home page timeline mobile */
  .timeline {
    flex-direction: column;
    gap: 2rem;
    align-items: stretch;
    padding: 2rem 1rem;
  }

  .timeline-line {
    top: 0;
    left: 1rem;
    right: auto;
    width: 2px;
    height: 100%;
    transform: none;
    z-index: 1;
    flex-direction: column;
    justify-content: space-around;
  }

  .timeline-marker-dot {
    width: 10px;
    height: 10px;
    margin-left: -4px;
  }

  .timeline-item {
    position: relative;
    min-width: auto;
    width: calc(100% - 3rem);
    max-width: none;
    height: auto;
    flex-direction: column;
    text-align: left;
    align-items: flex-start;
    padding: 1.5rem;
    justify-content: flex-start;
    border: 2px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    margin-left: 3rem;
    z-index: 2;
  }

  .timeline-item.most-recent {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
  }

  .timeline-item.work {
    border-color: #58a6ff;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
  }

  .timeline-item.education {
    border-color: #7c3aed;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(124, 58, 237, 0.05) 100%);
  }

  .timeline-item.leadership {
    border-color: #f59e0b;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(245, 158, 11, 0.05) 100%);
  }

  .timeline-marker {
    display: none;
  }

  .timeline-content-above {
    text-align: left;
    margin-bottom: 0.5rem;
    order: -1;
  }

  .timeline-content-below {
    text-align: left;
    margin-top: 0.5rem;
    order: 1;
  }

  .timeline-date {
    margin-bottom: 0.5rem;
  }

  .timeline-title {
    margin-top: 0;
    text-align: left;
  }

  .timeline-org {
    text-align: left;
  }

  .timeline-arrow {
    display: none;
  }

  .timeline-mobile-button {
    display: block;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-item {
    padding-left: 1.5rem;
  }
  
  /* Work page timeline mobile */
  .timeline.work-timeline::before {
    left: 30px;
  }
  
  .timeline.work-timeline .timeline-item:nth-child(odd) .timeline-content,
  .timeline.work-timeline .timeline-item:nth-child(even) .timeline-content {
    margin-left: 70px;
    margin-right: 0;
    text-align: left;
  }
  
  .timeline.work-timeline .timeline-marker {
    left: 30px;
  }
  
  .timeline.work-timeline .timeline-item:nth-child(odd) .timeline-content::before,
  .timeline.work-timeline .timeline-item:nth-child(even) .timeline-content::before {
    left: -30px;
    right: auto;
    border-right-color: var(--border);
    border-left-color: transparent;
  }
  
  .timeline.work-timeline .timeline-item:nth-child(odd) .timeline-header {
    flex-direction: row;
  }
  
  .timeline.work-timeline .timeline-item:nth-child(odd) .timeline-meta {
    flex-direction: row;
    text-align: left;
  }
  
  .timeline.work-timeline .timeline-item:nth-child(odd) .timeline-description {
    text-align: left;
  }
  
  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .timeline-logo {
    width: 50px;
    height: 50px;
  }
  
  /* About page mobile */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .activities-grid {
    grid-template-columns: 1fr;
  }
}