/* Base styles (reset, typography, buttons, header, footer, layout).
   Dark theme. */

*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--color-secondary-1);
  color: var(--color-support-4);
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.4;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-white); }
button { font: inherit; cursor: pointer; }
input, select { font: inherit; }
img { max-width: 100%; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: var(--color-secondary-1);
  border-bottom: 1px solid var(--color-divider);
}
.header__content {
  max-width: var(--width-layout);
  margin: 0 auto;
  height: var(--header-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  padding: 0 16px;
  gap: 24px;
}
.header__logo { display: inline-flex; font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.header__logo-word { color: var(--color-white); }
.header__logo-word--accent { color: var(--color-primary); }
.header__nav { display: flex; gap: 20px; justify-self: start; }
.header__navLink {
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px;
  color: var(--color-support-2);
  padding: 4px 8px; border-radius: var(--radius-sm);
}
.header__navLink.is-active { color: var(--color-white); background: var(--color-secondary-3); }
.header__user { display: flex; align-items: center; justify-self: end; gap: 8px; }
.header__userBtn {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent;
  border: 1px solid var(--color-secondary-3);
  color: var(--color-white);
  padding: 6px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
}
.header__userBtn:hover { background: var(--color-secondary-3); }
.header__userBtn[hidden] { display: none; }
.header__userLabel {
  font-size: 12px; font-weight: 700; color: var(--color-white);
  padding: 6px 12px;
  border: 1px solid var(--color-secondary-3);
  border-radius: 999px;
}

/* Tabs bar */
.tabsBar {
  position: sticky; top: var(--header-h); z-index: 40;
  background: var(--color-secondary-1);
  border-bottom: 1px solid var(--color-divider);
  display: flex; align-items: stretch;
  max-width: var(--width-layout);
  margin: 0 auto; padding: 0 16px;
  height: var(--tabs-h);
}
.tabsBar__tab {
  background: transparent; border: 0;
  color: var(--color-support-2);
  padding: 0 16px;
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px;
  border-bottom: 2px solid transparent;
}
.tabsBar__tab:hover { color: var(--color-white); }
.tabsBar__tab--active { color: var(--color-white); border-bottom-color: var(--color-primary); }
.tabsBar__spacer { flex: 1; }
.tabsBar__tool {
  background: transparent; border: 0;
  color: var(--color-support-2); font-size: 16px; align-self: center;
}
.tabsBar__tool:hover { color: var(--color-white); }
.tabsBar__tool.is-on { color: var(--color-yellow); }
.tabsBar__tool#soundBtn { font-size: 14px; margin-right: 2px; }
.tabsBar__status {
  align-self: center;
  font-size: 11px;
  color: var(--color-support-2);
  margin-right: 10px;
  font-weight: 700;
  white-space: nowrap;
}
.tabsBar__liveDot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-left: 4px;
  vertical-align: middle;
  animation: liveDotPulse 1.8s ease-in-out infinite;
}
@keyframes liveDotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

/* Layout container */
.container { max-width: var(--width-layout); margin: 0 auto; padding: 20px 16px 80px; }

/* Footer */
.footer {
  max-width: var(--width-layout); margin: 0 auto 40px;
  padding: 12px 16px;
  border-top: 1px solid var(--color-divider);
  color: var(--color-support-2); font-size: 12px;
  display: flex; gap: 8px;
}
.footer a { color: var(--color-support-4); text-decoration: underline; }
.footer[hidden] { display: none; }
.footer__admin { margin-left: auto; }

/* Buttons & fields */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--color-secondary-3);
  background: transparent; color: var(--color-white);
  font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px;
}
.btn:hover { background: var(--color-secondary-3); }
.btn--primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-2); }
.btn--ghost { border-color: transparent; }
.btn--danger { border-color: var(--color-red); color: var(--color-red); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.field { display: grid; gap: 4px; margin-bottom: 12px; }
.field__label { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--color-support-2); letter-spacing: 0.4px; }
.field__input {
  background: var(--color-support-1);
  border: 1px solid var(--color-secondary-3);
  color: var(--color-white);
  padding: 8px 12px; border-radius: var(--radius-sm);
}
.field__input:focus { outline: 2px solid var(--color-primary); outline-offset: -1px; }

/* Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--color-skeleton-1), var(--color-skeleton-2), var(--color-skeleton-1));
  background-size: 200% 100%;
  animation: shimmer 1.2s linear infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { to { background-position: -200% 0; } }

.empty { padding: 40px 16px; text-align: center; color: var(--color-support-2); }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  z-index: 100;
  background: var(--color-secondary-3); color: var(--color-white);
  border: 1px solid var(--color-support-2);
  padding: 10px 18px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
  opacity: 0; transition: opacity 0.2s, transform 0.2s;
}
.toast[hidden] { display: none; }
.toast.is-shown { opacity: 1; transform: translateX(-50%) translateY(-4px); }

/* hint prompting the user to allow audio */
.soundHint {
  position: fixed;
  left: 50%;
  bottom: 64px;
  transform: translateX(-50%);
  z-index: 120;
  background: var(--color-secondary-3);
  color: var(--color-white);
  border: 1px solid var(--color-support-2);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
}
.soundHint[hidden] { display: none; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-secondary-1); }
::-webkit-scrollbar-thumb { background: var(--color-secondary-3); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-support-2); }

@media (max-width: 640px) {
  .header__content { padding: 0 12px; gap: 12px; }
  .header__nav { gap: 10px; }
  .container { padding: 12px 8px 60px; }
}