:root {
  --nav-bg: #1F3D2E;
  --nav-text: #EAF3EE;
  --accent: #7FB69E;
  --search-bg: #294F3C;
  --page-bg: #F5F8F6;
  --text-body: #24302B;
}
 
* {
  box-sizing: border-box;
}
 
body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text-body);
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}
 
/* ── NAVBAR ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 32px;
  background: var(--nav-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}

/* Brand: link + logo image */
.navbar__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.navbar__logo {
  display: block;
  width: 40px;   /* visible size; source can be 128x128 */
  height: 40px;
  object-fit: contain;
}

/* ── NAV LINKS (4 <a>) ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar__links a {
  color: var(--nav-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
  opacity: 0.85;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.navbar__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.navbar__links a:hover,
.navbar__links a:focus-visible {
  opacity: 1;
  color: var(--accent);
}

.navbar__links a:hover::after,
.navbar__links a:focus-visible::after,
.navbar__links a.active::after {
  width: 100%;
}

.navbar__links a.active {
  opacity: 1;
  color: var(--accent);
}

/* ── RIGHT SIDE (search + future map button) ── */
.navbar__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ── SEARCH BAR ── */
.navbar__search {
  display: flex;
  align-items: center;
  background: var(--search-bg);
  border: 1px solid rgba(127, 182, 158, 0.25);
  border-radius: 8px;
  padding: 6px 12px;
  min-width: 200px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.navbar__search:focus-within {
  border-color: var(--accent);
  background: #234636;
}

.navbar__search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--nav-text);
  font-size: 14px;
  font-family: inherit;
}

.navbar__search input::placeholder {
  color: rgba(234, 243, 238, 0.5);
}

.navbar__search svg {
  width: 16px;
  height: 16px;
  stroke: var(--accent);
  margin-right: 8px;
  flex-shrink: 0;
}

@media (max-width: 720px) {
  .navbar {
    flex-wrap: wrap;
    height: auto;
    padding: 8px 16px;
    gap: 8px;
  }

  /* Row 1: logo + links */
  .navbar__brand {
    order: 1;
    flex: 0 0 auto;        /* logo keeps its size */
    margin-bottom: 0;
  }

  .navbar__logo {
    width: 32px;
    height: 32px;
  }

  .navbar__links {
    order: 1;
    flex: 1 1 auto;
    gap: 16px;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  /* Row 2: search */
  .navbar__right {
    order: 2;
    width: 100%;
    justify-content: center;
  }

  .navbar__search {
    width: 100%;
  }
}

 /* ── FLOATING ACTION BUTTON (FAB) ── */
      .fab {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.25);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
        z-index: 100;
      }

      .fab:hover {
        background: rgba(255, 255, 255, 0.22);
        border-color: rgba(255, 255, 255, 0.5);
        transform: scale(1.08);
      }

      .fab svg {
        width: 20px;
        height: 20px;
        stroke: rgba(255, 255, 255, 0.85);
        stroke-width: 1.8;
      }

#navVerticalLine {
  display: none;
}

      .class-list {
        position: absolute;
        top: 50%;
        right: 5%;
        transform: translateY(-50%);
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 0;
        animation: fadeUp 1s 0.3s ease-out both;
      }

      .class-item {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 0.75rem 0;
        text-decoration: none;
        color: rgba(255, 255, 255, 0.55);
        font-family: 'DM Sans', sans-serif;
        font-size: clamp(0.85rem, 1.4vw, 1.05rem);
        font-weight: 300;
        letter-spacing: 0.08em;
        transition: color 0.25s ease;
        position: relative;
        width: 100%;
        justify-content: flex-end;
      }

      .class-item::after {
        content: '';
        position: absolute;
        bottom: 0;
        right: 0;
        width: 100%;
        height: 1px;
        background: rgba(255, 255, 255, 0.15);
        transition: background 0.25s ease;
      }

      .class-item:last-child::after {
        display: none;
      }

      .class-item:hover {
        color: #ffffff;
      }

      .class-item:hover::after {
        background: rgba(255, 255, 255, 0.4);
      }

      .class-item.active {
        color: #ffffff;
        font-weight: 400;
      }

      .class-item.active .class-indicator {
        opacity: 1;
      }

      .class-indicator {
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: #ffffff;
        opacity: 0;
        transition: opacity 0.25s ease;
        flex-shrink: 0;
      }

      .class-item:hover .class-indicator {
        opacity: 0.6;
      }