/* Design tokens: highly readable, low eye-strain */
:root {
  --bg: #f5f7fa;             /* soft neutral background */
  --surface: #fcfcfd;         /* gentle surface (not pure white) */
  --text: #0f172a;            /* slate-900 like for reduced glare */
  --muted: #475569;           /* slate-600 for secondary text */
  --border: #dfe4ee;          /* soft borders */
  --accent: #2563eb;          /* accessible blue */
  --accent-weak: #eff4ff;     /* very light blue tint */
  --accent-border: #b6c4e3;   /* light blue-gray border */
  --positive: #0f766e;        /* teal (ready) */
  --badge-bg: #fde68a;        /* warm badge bg */
  --badge-fg: #7a5b00;        /* badge text */
  --danger: #b00020;          /* accessible red */
  /* Controls */
  --input-border: #cfd6e6;
  --input-bg: var(--surface);
  --input-fg: var(--text);
  --placeholder: #94a3b8;
  --btn-bg: #f8fafc;          /* slate-50 */
  --btn-fg: var(--text);
  --btn-border: #d8dee9;
  --btn-hover-bg: #ffffff;
  --btn-hover-border: var(--accent-border);
  --btn-active-bg: #eef2f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --surface: #10141a;
    --text: #e5e7eb;
    --muted: #a5b0bf;
    --border: #202733;
    --accent: #60a5fa;
    --accent-weak: #101b2b;
    --accent-border: #2a3f62;
    --positive: #34d399;
    --badge-bg: #3b2f00;
    --badge-fg: #fde68a;
    --danger: #ff6b81;
    --input-border: #2a3445;
    --input-bg: #0f131a;
    --input-fg: var(--text);
    --placeholder: #7a8596;
    --btn-bg: #1a2230;
    --btn-fg: var(--text);
    --btn-border: #2a3445;
    --btn-hover-bg: #222c3d;
    --btn-hover-border: #3a4b68;
    --btn-active-bg: #192231;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; font-size: 17px; line-height: 1.7; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }

#app { display: grid; grid-template-columns: 280px 1fr; height: 100vh; }

#sidebar { border-right: 1px solid var(--border); padding: 12px; overflow: auto; background: var(--surface); }
#sidebarHeader { display: flex; justify-content: space-between; align-items: center; }
#sidebar h2 { margin: 0 0 8px 0; font-size: 16px; font-weight: 700; letter-spacing: .2px; }
#toggleSidebar { display: none; }
#players { list-style: none; padding: 0; margin: 0; }
#players li { padding: 8px 10px; margin: 6px 0; border-radius: 10px; background: var(--surface); display: flex; align-items: center; gap: 8px; border: 1px solid var(--border); }
.ready { color: var(--positive); font-weight: 700; }
.turn { border: 1px solid var(--accent); background: var(--accent-weak); }

#main { display: grid; grid-template-rows: auto auto auto 1fr auto; height: 100vh; }
#topbar { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 14px; border-bottom: 1px solid var(--border); background: var(--surface); }
#topbar .left { display: flex; flex-direction: column; gap: 2px; }
.appTitle { font-weight: 800; letter-spacing: 0.2px; font-size: 18px; }
.subStatus { display: flex; gap: 8px; align-items: center; }
.muted { color: var(--muted); }
.badge { background: var(--badge-bg); color: var(--badge-fg); padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }

#nameBox { display: flex; gap: 6px; align-items: center; }
#profile { width: 100%; min-height: 72px; resize: vertical; }
#controls { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--border); background: var(--surface); }
#world { padding: 12px; border-bottom: 1px solid var(--border); background: var(--surface); }
#world .worldToggle { appearance: none; background: transparent; border: none; color: var(--text); padding: 6px 4px; margin: 0; font-size: 15px; font-weight: 700; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
#world .worldToggle::before { content: '\25B6'; /* ▶ */ font-size: 12px; color: var(--muted); transform: translateY(1px); transition: transform .15s ease; }
#world[data-open="true"] .worldToggle::before { transform: rotate(90deg) translateX(1px); }
#worldText { white-space: pre-wrap; color: var(--text); }
#world[data-open="false"] #worldText { display: none; }

#chat { padding: 16px 12px; overflow: auto; }
.dm { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; width: min(72ch, calc(100% - 24px)); margin: 12px 0; line-height: 1.7; box-shadow: 0 1px 0 rgba(0,0,0,0.02); }
.dmMeta { font-size: 12px; color: var(--muted); margin-bottom: 6px; letter-spacing: .2px; }
.sys { color: var(--muted); font-style: italic; margin: 10px 0; }
#composer { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--border); align-items: center; background: var(--surface); }
#feedback { grid-column: 1 / -1; min-height: 20px; color: var(--danger); font-size: 14px; }

button { padding: 10px 14px; border: 1px solid var(--btn-border); border-radius: 10px; background: var(--btn-bg); cursor: pointer; color: var(--btn-fg); font-weight: 600; }
button:disabled { opacity: 0.6; cursor: not-allowed; }
input[type="range"] { vertical-align: middle; }

/* Inline input spinner */
.composerInputWrap { position: relative; width: 100%; min-width: 0; }
.composerInputWrap.pending input { padding-right: 36px; }
.composerInputWrap input { width: 100%; }
.inputSpinner { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); display: flex; align-items: center; gap: 6px; pointer-events: none; }
.inputSpinner[hidden] { display: none; }
.loader { width: 56px; height: 56px; border-radius: 50%; border: 4px solid color-mix(in srgb, var(--accent) 25%, transparent); border-top-color: var(--accent); animation: spin 1s linear infinite; }
.loader.small { width: 18px; height: 18px; border-width: 3px; }
.visually-hidden { position: absolute !important; height: 1px; width: 1px; overflow: hidden; clip: rect(1px, 1px, 1px, 1px); white-space: nowrap; }

@keyframes spin { to { transform: rotate(360deg); } }

/* Buttons hover/focus */
button { transition: background .15s ease, border-color .15s ease, transform .05s ease; }
button:hover:not(:disabled) { background: var(--btn-hover-bg); border-color: var(--btn-hover-border); }
button:active:not(:disabled) { transform: translateY(1px); background: var(--btn-active-bg); }
input, textarea { border: 1px solid var(--input-border); border-radius: 10px; padding: 10px; outline: none; background: var(--input-bg); color: var(--input-fg); }
input::placeholder, textarea::placeholder { color: var(--placeholder); }
input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .loader { animation: none; }
}

/* Responsive */
@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; }
  #sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: 80%; max-width: 320px; transform: translateX(-100%); transition: transform .2s ease; box-shadow: 2px 0 12px rgba(0,0,0,0.08); }
  #sidebar.open { transform: translateX(0); }
  #toggleSidebar { display: inline-block; }
}