/* ===========================
   Top Navigation (Navbar)
   =========================== */

   .topbar {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: 40;
    height: 64px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    background: var(--card);
    border-bottom: 1px solid var(--border);
  }
  
  /* Small logo above */
  .brand-mini {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text);
  }
  
  .brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 20%, #f9fafb, var(--accent-strong));
    box-shadow: 0 0 0 6px rgba(56, 189, 248, 0.35);
  }
  
  /* Right side of navbar */
  .nav {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  /* ===========================
     Buttons
     =========================== */
  
  .link-btn,
  .btn {
    position: relative;
    border-radius: 999px;
    border: 1px solid var(--border, rgba(148, 163, 184, 0.4));
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    background: var(--surface);
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease,
      color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }
  
  .link-btn:hover,
  .btn:hover {
    background: var(--surface);
    border-color: var(--glow, rgba(129, 140, 248, 0.8));
    box-shadow: 0 0 0 1px var(--glow, rgba(56, 189, 248, 0.35));
    transform: translateY(-0.5px);
  }
  
  .link-btn:active,
  .btn:active {
    transform: translateY(0);
    box-shadow: none;
  }
  
  
  /* Main CTA button */
  .cta {
    border-radius: 999px;
    padding: 12px 26px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    background-image: linear-gradient(120deg, #2563eb, #0ea5e9);
    color: #f9fafb;
    box-shadow: 0 20px 45px rgba(37, 99, 235, 0.5);
  }
  
  .cta:hover {
    filter: brightness(1.05);
    box-shadow: 0 24px 60px rgba(37, 99, 235, 0.65);
  }
  
  .cta:active {
    filter: brightness(0.98);
    box-shadow: 0 16px 40px var(--shadow, rgba(15, 23, 42, 0.9));
  }
  
  /* Quizzes button */
  .quizzes-btn {
    min-width: 140px;
  }
  
  /* Ghost button (like success page) */
  .ghost {
    border-radius: 999px;
    padding: 9px 18px;
    font-size: 14px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, transform 0.08s ease;
  }
  
  .ghost:hover {
    background: var(--surface);
    transform: translateY(-1px);
  }
  
  /* ===========================
     Dropdowns
     =========================== */
  
  .dropdown {
    position: relative;
  }
  
  .dropdown-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 220px;
    padding: 12px 12px 14px;
    background: var(--card);
    border-radius: 14px;
    border: 1px solid var(--border);
    box-shadow: 0 30px 80px var(--shadow, rgba(15, 23, 42, 0.9));
    color: var(--text);
    display: none;
  }
  
  .dropdown.open .dropdown-panel {
    display: block;
  }
  
  /* User info card inside dropdown */
  .user-info-card {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  
  .avatar-wrap.info {
    width: 52px;
    height: 52px;
    border-radius: 999px;
    overflow: hidden;
    background: radial-gradient(circle at 0 0, var(--card), var(--bg));
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .avatar-wrap.info img.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .info-box {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 6px;
    row-gap: 2px;
    font-size: 12px;
  }
  
  .info-title {
    color: var(--muted);
  }
  
  .info-value {
    font-weight: 500;
  }
  
  .info-links {
    margin-top: 10px;
    display: flex;
    gap: 8px;
  }
  
  
  /* ===========================
     Small Helpers
     =========================== */
  
  .muted {
    color: var(--muted);
  }
  
  .row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }
  
  /* ===========================
     Responsive (Components)
     =========================== */
  
  @media (max-width: 900px) {
    .topbar {
      padding-inline: 16px;
      height: 58px;
    }
  }
  
  @media (max-width: 640px) {
    .brand-mini {
      font-size: 16px;
    }
  
    .nav {
      gap: 6px;
    }
  
    .link-btn,
    .btn {
      padding-inline: 10px;
    }
  }