/* Buttons, sidebar, top bar, theme toggle, mobile menu */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  height: 46px;
  padding: 0 1.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  cursor: pointer;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.45s var(--spring), background 0.3s, box-shadow 0.3s;
}
.btn:hover { transform: translateY(-2px) scale(1.03); background: var(--glass-strong); }
.btn:active { transform: scale(0.96); }
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-glow {
  border: 0;
  color: #02121b;
  background: var(--accent-grad);
  background-size: 200% 100%;
  box-shadow: 0 10px 30px -6px rgba(41, 182, 236, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  animation: shimmer 6s linear infinite;
}
.btn-glow:hover { background: var(--accent-grad); background-size: 200% 100%; box-shadow: 0 14px 44px -6px rgba(41, 182, 236, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.7); }
@keyframes shimmer { 0%, 100% { background-position: 0 0; } 50% { background-position: 100% 0; } }

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky;
  top: var(--gap);
  display: flex;
  flex-direction: column;
  height: calc(100vh - 2 * var(--gap));
  padding: 18px 14px;
}
.nav { display: flex; flex-direction: column; gap: 4px; }
.nav a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.3s, background 0.3s, transform 0.4s var(--spring);
}
.nav a svg { width: 20px; height: 20px; }
.nav a:hover { color: var(--text); transform: translateX(3px); }
.nav a.active { color: var(--text); background: var(--glass-strong); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1); }
.nav a.active::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 3px;
  background: var(--accent-grad);
  box-shadow: 0 0 12px var(--blue-bright);
}

.sidebar-card {
  margin-top: auto;
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(6, 151, 196, 0.22), rgba(6, 151, 196, 0.04));
  border: 1px solid rgba(41, 182, 236, 0.25);
  font-size: 0.85rem;
  color: var(--muted);
}
.sidebar-card strong { display: block; font-size: 1.5rem; color: var(--text); }
.stars { color: #ffc94d; letter-spacing: 2px; }

.scheme { margin-top: 18px; text-align: center; }
.scheme small { display: block; margin-bottom: 10px; font-size: 0.7rem; letter-spacing: 0.14em; color: var(--muted); }
.toggle {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--field);
}
.toggle button { position: relative; z-index: 1; padding: 8px 0; border: 0; background: none; font-weight: 600; font-size: 0.85rem; color: var(--muted); cursor: pointer; transition: color 0.3s; }
.toggle button[aria-pressed="true"] { color: #02121b; }
.toggle .thumb {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  border-radius: 999px;
  background: var(--accent-grad);
  box-shadow: 0 6px 18px -4px rgba(41, 182, 236, 0.6);
  transition: transform 0.55s var(--spring);
}
:root[data-theme="light"] .toggle .thumb { transform: translateX(100%); }

/* Legal notice / privacy: small, under the colour switch */
.sidebar .legal { display: flex; justify-content: center; gap: 14px; margin-top: 14px; font-size: 0.72rem; color: var(--muted); opacity: 0.75; }
.sidebar .legal a:hover { color: var(--text); opacity: 1; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: var(--gap);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px 12px 24px;
  border-radius: 24px;
}
.logo img { height: 40px; width: auto; }
:root[data-theme="light"] .logo img { filter: invert(1) brightness(0.3); }

.search {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 10px;
  max-width: 480px;
  height: 46px;
  margin-left: auto;
  padding: 0 8px 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--field);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.search:focus-within { border-color: rgba(41, 182, 236, 0.6); box-shadow: 0 0 0 4px rgba(41, 182, 236, 0.12); }
.search svg { width: 18px; flex: none; color: var(--muted); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--text); font: 500 0.95rem Urbanist, sans-serif; }
.search input::placeholder { color: var(--muted); }
.search .clear { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 50%; background: var(--glass); color: var(--muted); cursor: pointer; }
.search .clear[hidden] { display: none; }

.burger { display: none; width: 46px; padding: 0; }

/* ---------- Mobile ---------- */
@media (max-width: 980px) {
  :root { --gap: 12px; }
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    inset: 12px auto 12px 12px;
    z-index: 50;
    width: min(280px, 82vw);
    height: auto;
    transform: translateX(-110%);
    transition: transform 0.6s var(--spring);
  }
  body.menu-open .sidebar { transform: none; }
  body.menu-open::after { content: ""; position: fixed; inset: 0; z-index: 40; width: auto; height: auto; border-radius: 0; filter: none; background: rgba(0, 0, 0, 0.5); }
  .burger { display: inline-flex; }
  .topbar .btn-glow { margin-left: auto; }
  .search, .topbar .btn-search { display: none; }
  .topbar { padding-left: 16px; }
  .logo img { height: 34px; }
}
@media (max-width: 520px) {
  .topbar .btn-glow span { display: none; }
  .topbar .btn-glow { width: 46px; padding: 0; }
}