/* Utility Classes */

.center {
  text-align: center;
}

.left-border {
  border-left: 0.25rem solid var(--color-background);
  padding-left: 0.75rem;
}

.color-primary {
  color: var(--color-primary);
}

.color-secondary {
  color: var(--color-secondary);
}

.color-success {
  color: var(--color-success);
}

/* Color Variables */

:root {
  --color-text: #000000;
  --color-primary: #003f81;
  --color-success: #009600;
  --color-secondary: #374151;
  --color-body: #ffffff;
  --color-background: #005eb8;
  --color-border: #dbe3ef;
  --color-shadow: rgba(15, 23, 42, 0.2);
  --color-overlay: rgba(0, 0, 0, 0.5);
  --color-photo-info: #555555;
}

/* Layout Styles */

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: Arial, "Noto Sans TC", sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-body);
  display: flex;
  flex-direction: column;
}

nav,
footer {
  background-color: var(--color-background);
  color: var(--color-body);
}

footer b {
  display: block;
  margin-top: 0.5rem;
}

.page-width,
.container {
  width: min(100% - 2rem, 1200px);
  margin-inline: auto;
  padding: 2rem 0;
  flex: 1;
}

.flex {
  display: flex;
  flex-wrap: wrap;
}

/* Site Header */

.site-header {
  padding-top: 1rem;

  img {
    height: 3rem;
  }

  div {
    a {
      color: var(--color-text);
      font-size: clamp(1.8rem, 2.5vw, 2.5rem);
      font-weight: 700;
    }

    p {
      margin: 0;
      color: var(--color-secondary);
      font-size: clamp(1.2rem, 1.5vw, 1.5rem);
      font-weight: 700;
    }
  }
}


/* Site Navigation */

.site-nav {
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  flex-wrap: wrap;
  padding: 0;
}

.site-nav a {
  min-width: 8rem;
  display: flex;
  flex: 1 1 0;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  padding: 1.5rem 0;
  color: var(--color-body);
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav button:hover,
.site-nav button:focus-visible {
  background-color: var(--color-primary);
}

.site-nav a[aria-current] {
  color: var(--color-primary);
  background-color: var(--color-body);
  font-weight: 700;
}

.site-nav button {
  display: none;
  width: 100%;
  padding: 1.5rem 0;
  background: transparent;
  color: var(--color-body);
  font-size: 1.2rem;
  font-weight: 700;
  border: none;
  cursor: pointer;

  span {
    display: inline-block;
    margin-left: 0.5rem;
    transition: all 0.3s ease;
  }
}

@media (max-width: 720px) {
  .site-nav {
    button {
      display: block;

      &[aria-expanded="true"] {
        span {
          transform: rotate(180deg);
        }

        ~a {
          height: auto;
          padding: 1.5rem 0;
        }
      }
    }

    a {
      height: 0;
      padding: 0;
      overflow: hidden;
      transition: all 0.2s ease;
    }
  }
}

/* Block Title */

h1 {
  margin: 0.5rem 0 1rem;
}

h2 {
  margin: 2rem 0 1rem;
}

/* List Styles */

ul {
  display: grid;
  margin: 0;
  padding-left: 0;
  list-style: none;
}

ul li {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 1rem;
  background-color: var(--color-body);
  border-color: transparent;
  border-bottom: 1px solid var(--color-border);
}

ul li:hover {
  box-shadow: 0 8px 18px var(--color-shadow);
  transform: translateY(-1px);
  transition: all 0.2s;
}

ul li:hover div[aria-title] {
  font-weight: 500;
}

ul time {
  color: var(--color-secondary);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
}

ul p {
  color: var(--color-secondary);
}

/* Link Styles */

a {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 1.2rem;
  text-decoration: none;
  position: relative;

  &::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.1rem;
    width: 0;
    height: 0.1rem;
    background: var(--color-primary);
    transition: .3s;
  }

  &:hover::before {
    width: 100%;
  }
}