/* Base, layout shell and shared components (buttons, cards, inputs, toasts). */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text);
  font: 400 var(--fs-md)/1.5 var(--font-ui);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--lamp-soft); }
img, svg, canvas, video { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--lamp); outline-offset: 2px; border-radius: 6px; }
::selection { background: var(--lamp); color: var(--ink-900); }

.skip-link {
  position: fixed; left: var(--s-3); top: -60px; z-index: var(--z-toast);
  background: var(--lamp); color: var(--ink-900); padding: var(--s-2) var(--s-3); border-radius: var(--r-sm);
}
.skip-link:focus { top: var(--s-3); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- views ---------- */
#mount-scene { position: fixed; inset: 0; z-index: var(--z-scene); }
main { position: relative; z-index: var(--z-view); }
.view { display: none; }
body[data-view='landing'] .view-landing { display: block; }
body[data-view='room'] .view-room { display: grid; }

/* ---------- room shell ---------- */
.view-room {
  height: 100dvh;
  grid-template-columns: var(--left-w) minmax(0, 1fr) var(--right-w);
  grid-template-rows: var(--top-h) minmax(0, 1fr) var(--dock-h);
  grid-template-areas:
    'top top top'
    'left stage right'
    'dock dock dock';
  gap: var(--s-3);
  padding: var(--s-3);
}
.room-top { grid-area: top; display: flex; align-items: center; gap: var(--s-4); padding: 0 var(--s-2); }
.room-brand { display: flex; align-items: center; gap: var(--s-2); min-width: 0; flex: 0 1 auto; }
.brand-mark {
  flex: none; width: 18px; height: 22px; border-radius: 3px; background: var(--lamp);
  box-shadow: 0 0 18px var(--lamp-glow);
  background-image: linear-gradient(var(--ink-900), var(--ink-900)), linear-gradient(var(--ink-900), var(--ink-900));
  background-size: 2px 100%, 100% 2px; background-position: center; background-repeat: no-repeat;
}
.brand-word { font-family: var(--font-display); font-size: var(--fs-lg); font-variation-settings: 'SOFT' 100; letter-spacing: 0.01em; }
.room-code {
  font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-dim);
  padding: 2px 8px; border: 1px solid var(--glass-line-strong); border-radius: var(--r-pill);
  min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
/* The slot never narrows below the timer pill; the room code ellipsizes first. */
.room-top-slot { flex: 1; display: flex; justify-content: center; min-width: max-content; }
.room-top-actions { display: flex; gap: var(--s-2); flex: none; }

.room-left { grid-area: left; display: flex; flex-direction: column; gap: var(--s-3); min-height: 0; }
.room-stage { grid-area: stage; min-height: 0; position: relative; }
.room-right { grid-area: right; min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.room-dock {
  grid-area: dock; display: flex; align-items: center; gap: var(--s-2);
  padding: 0 var(--s-3); border-radius: var(--r-lg);
  background: var(--glass); backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-line); z-index: var(--z-dock);
}
.dock-group { display: flex; align-items: center; gap: var(--s-1); }
.dock-group:empty { display: none; }
.dock-sep { width: 1px; height: 28px; background: var(--glass-line-strong); margin: 0 var(--s-1); }
.dock-end { margin-left: auto; }

/* ---------- surfaces ---------- */
.card {
  background: var(--glass);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}
.card-grow { flex: 1; min-height: 0; overflow: auto; }
.card-title {
  font-family: var(--font-display); font-weight: 500; font-size: var(--fs-lg);
  font-variation-settings: 'SOFT' 100; margin: 0;
}
.eyebrow { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.14em; color: var(--text-faint); }

/* ---------- buttons ---------- */
.btn, .btn-ghost, .btn-icon {
  border: 1px solid transparent; border-radius: var(--r-pill);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast), color var(--t-fast), box-shadow var(--t-med), transform var(--t-fast);
}
.btn {
  background: var(--lamp); color: var(--ink-900); font-weight: 600; padding: 10px 18px;
  box-shadow: 0 0 0 0 var(--lamp-glow);
}
.btn:hover { box-shadow: var(--shadow-lamp); }
.btn:active, .btn-ghost:active, .btn-icon:active { transform: scale(0.97); }
.btn-ghost { background: transparent; border-color: var(--glass-line-strong); color: var(--text); padding: 7px 14px; font-size: var(--fs-sm); }
.btn-ghost:hover { background: rgba(243, 233, 216, 0.06); }
.btn-icon {
  width: 44px; height: 44px; display: inline-grid; place-items: center;
  background: rgba(243, 233, 216, 0.05); border-color: var(--glass-line); color: var(--text);
  position: relative;
}
.btn-icon:hover { background: rgba(243, 233, 216, 0.1); }
.btn-icon[aria-pressed='true'] { background: var(--lamp); color: var(--ink-900); box-shadow: var(--shadow-lamp); }
.btn-icon.is-off { color: var(--danger); }
.btn-icon svg { width: 20px; height: 20px; }
[data-tip]:hover::after {
  content: attr(data-tip); position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  background: var(--glass-strong); border: 1px solid var(--glass-line-strong); color: var(--text);
  font-size: var(--fs-xs); padding: 4px 8px; border-radius: var(--r-sm); white-space: nowrap; pointer-events: none; z-index: var(--z-overlay);
}
/* No tooltip on a trigger whose popover is open (it would peek out under the panel). */
[data-tip][aria-expanded='true']:hover::after { display: none; }

/* ---------- inputs ---------- */
.input {
  width: 100%; background: rgba(7, 9, 15, 0.55); border: 1px solid var(--glass-line-strong);
  border-radius: var(--r-md); padding: 10px 14px; color: var(--text);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.input::placeholder { color: var(--text-faint); }
.input:focus { outline: none; border-color: var(--lamp); box-shadow: 0 0 0 3px var(--lamp-glow); }
input[type='range'] { accent-color: var(--lamp); }

/* ---------- popovers (dock panels) ---------- */
.popover {
  position: absolute; bottom: calc(100% + 12px); left: 0; min-width: 280px;
  background: var(--glass-strong); backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-line-strong); border-radius: var(--r-lg); box-shadow: var(--shadow);
  padding: var(--s-4); z-index: var(--z-overlay);
  opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
.popover.open { opacity: 1; transform: none; pointer-events: auto; }

/* ---------- toasts ---------- */
#toasts {
  position: fixed; left: 50%; top: var(--s-4); transform: translateX(-50%); z-index: var(--z-toast);
  display: flex; flex-direction: column; gap: var(--s-2); align-items: center; pointer-events: none;
}
.toast {
  display: flex; gap: var(--s-2); align-items: center;
  background: var(--glass-strong); border: 1px solid var(--glass-line-strong); border-radius: var(--r-pill);
  padding: 8px 16px; font-size: var(--fs-sm); box-shadow: var(--shadow);
  animation: toast-in var(--t-med) var(--ease);
}
.toast-icon { color: var(--lamp); }
.toast.out { opacity: 0; transform: translateY(-6px); transition: all 0.35s var(--ease); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-8px); } }

/* ---------- scrollbars ---------- */
* { scrollbar-width: thin; scrollbar-color: var(--ink-600) transparent; }

/* ---------- focus mode (palette feature toggles body.focus-mode) ---------- */
body.focus-mode .room-left > :not(#mount-timer),
body.focus-mode .room-right { opacity: 0; pointer-events: none; }
.room-left > *, .room-right { transition: opacity var(--t-slow) var(--ease); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  :root { --left-w: 260px; --right-w: 310px; }
}
@media (max-width: 900px) {
  .view-room {
    height: auto; min-height: 100dvh;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: var(--top-h) auto minmax(50vh, auto) auto minmax(60vh, auto) var(--dock-h);
    grid-template-areas: 'top' 'left' 'stage' 'left2' 'right' 'dock';
    padding: var(--s-2) var(--s-3) calc(var(--dock-h) + var(--s-5));
  }
  .room-left { display: contents; }
  #mount-timer { grid-area: left; }
  #mount-goals { grid-area: left2; max-height: 50vh; }
  /* No backdrop-filter here: it would become the containing block for fixed popovers and the scroll would clip them. */
  /* Scroll shadows (not mask-image, which would hide the fixed popovers): an edge darkens while content is hidden past it. */
  .room-dock {
    position: fixed; left: var(--s-2); right: var(--s-2); bottom: var(--s-2); height: var(--dock-h); overflow-x: auto;
    backdrop-filter: none; -webkit-backdrop-filter: none;
    scroll-snap-type: x proximity; overscroll-behavior-x: contain;
    background:
      linear-gradient(to right, var(--glass-strong) 30%, transparent) left / 32px 100% no-repeat local,
      linear-gradient(to left, var(--glass-strong) 30%, transparent) right / 32px 100% no-repeat local,
      linear-gradient(to right, rgba(0, 0, 0, 0.45), transparent) left / 20px 100% no-repeat scroll,
      linear-gradient(to left, rgba(0, 0, 0, 0.45), transparent) right / 20px 100% no-repeat scroll,
      var(--glass-strong);
  }
  .room-dock > .dock-group, .room-dock > button { scroll-snap-align: start; }
  .room-dock .popover {
    position: fixed; left: var(--s-2); right: var(--s-2); bottom: calc(var(--dock-h) + var(--s-4));
    min-width: 0; max-height: 70dvh; overflow: auto;
  }
  .brand-word { display: none; }
  .room-top { gap: var(--s-2); }
}