/* Shared styles for Bowen Xu's homepage - responsive & accessible */

* {
  box-sizing: border-box;
}

/* Skip to main content - for keyboard/screen reader users */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: #bb261a;
  color: white;
  padding: 0.75rem 1rem;
  z-index: 100;
  text-decoration: none;
  font-weight: bold;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Cambria, Calibri, Garamond, "Century Gothic", Gulim, Dotum, Arial, sans-serif;
  font-size: clamp(1rem, 1.3vmax, 1.25rem);
  margin: 0 auto;
  width: 90%;
  max-width: 1200px;
  padding-top: 4rem; /* Space for fixed navbar */
  background-image: url(imgs/yellowbg.jpg);
  background-attachment: scroll;
}

/* Image container - about section */
.imgparent {
  max-width: 40%;
  flex-shrink: 0;
}
.imgparent img {
  max-width: 300px;
  width: 100%;
  height: auto;
}

/* Navigation */
.navbar {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  background-color: #333;
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 1200px;
  font-size: clamp(0.9rem, 1.5vmax, 1.1rem);
  display: flex;
  flex-wrap: wrap;
  z-index: 50;
  box-sizing: border-box;
}
.navbar a {
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 0.75rem 1rem;
  min-width: max-content;
  text-decoration: none;
  white-space: nowrap;
}
.navbar a:hover,
.navbar a:focus-visible {
  background: white;
  color: #bb261a;
  outline: 2px solid white;
  outline-offset: 2px;
}

.main {
  margin-top: 3px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.column {
  flex: 1 1 100%;
  padding: 1.5rem;
}

.alert {
  padding: 1rem 1.25rem;
  background-color: #bb261a;
  color: white;
  margin-bottom: 15px;
}
.alert a {
  color: white;
  text-decoration: underline;
}
.alert a:hover,
.alert a:focus-visible {
  text-decoration: none;
  outline: 2px solid white;
  outline-offset: 2px;
}

.news {
  height: auto;
  max-height: 500px;
  overflow: auto;
}
.news-icon {
  vertical-align: middle;
  margin-right: 0.25rem;
}

/* Responsive: tablet and below */
@media (max-width: 768px) {
  body {
    width: 95%;
    padding-top: 1rem;
  }

  .navbar {
    width: 95%;
    padding: 0;
  }
  .navbar a {
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
  }

  .row {
    flex-direction: column;
    align-items: flex-start;
  }

  .imgparent {
    max-width: 100%;
  }
  .imgparent img {
    max-width: 240px;
  }

  .column {
    padding: 1rem;
  }

  .news {
    max-height: none;
  }
}

/* Responsive: small phones */
@media (max-width: 480px) {
  body {
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .navbar {
    width: 100%;
    left: 0;
    transform: none;
    justify-content: flex-start;
  }
  .navbar a {
    padding: 0.5rem 0.6rem;
    font-size: 0.85rem;
  }

  .alert {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }
}

/* Prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .skip-link {
    transition: none;
  }
}