/* ==========================================================================
   TB<3 web app. Component CSS lifted from docs/architecture/design-preview.html
   (design-system.md §10). Uses ONLY tokens from design-tokens.css: no hex here.
   ========================================================================== */

/* ---- Fonts: self-hosted IBM Plex, latin subset (SIL OFL 1.1, fonts/OFL.txt) */
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 400 700; font-display: swap; src: url("/static/fonts/plex-sans-latin.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("/static/fonts/plex-mono-400-latin.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("/static/fonts/plex-mono-500-latin.woff2") format("woff2"); }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-sans); font-size: var(--text-body); line-height: var(--leading-body);
  transition: background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out);
}
::selection { background: var(--selection-bg); color: var(--selection-fg); }
h1, h2, h3, h4 { margin: 0; font-weight: var(--font-weight-medium); letter-spacing: var(--tracking-title); line-height: var(--leading-title); }
p { margin: 0; }
a { color: var(--color-blue); text-underline-offset: 3px; }
[hidden] { display: none !important; }
.linkrow { display: inline-flex; align-items: center; min-height: var(--tap-min); justify-self: start; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.label { font-family: var(--font-mono); font-weight: var(--font-weight-medium); font-size: var(--text-label); text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--color-muted); }
.label--write { color: var(--color-red); }
.data { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.caption { font-size: var(--text-caption); color: var(--color-muted); }
.icon { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
:where(button, a, textarea, input):focus-visible { outline: 2px solid transparent; box-shadow: var(--focus-ring); }

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--tap-min); min-width: var(--tap-min); padding: 0 var(--space-4);
  border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--color-text);
  font: inherit; font-weight: var(--font-weight-medium); cursor: pointer; white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.btn:active { transform: scale(var(--press-scale)); }
.btn:hover { background: var(--color-tint); }
.btn--primary { position: relative; background: var(--btn-bg); color: var(--btn-fg); font-weight: var(--font-weight-bold); }
.btn--primary:hover, .btn--primary:active { background: var(--btn-bg-hover); }
.btn--primary[disabled] { background: var(--btn-bg); }
.flame { position: absolute; pointer-events: none; z-index: 10; image-rendering: pixelated; image-rendering: crisp-edges; transition: opacity 120ms linear; }
.btn--soft { background: var(--color-tint); }
.btn--soft:hover { background: var(--color-tint-2); }
.btn--text { color: var(--color-muted); }
.btn--text:hover { color: var(--color-text); }
.btn--lg { min-height: var(--tap-primary); padding: 0 var(--space-5); }
.btn--block { width: 100%; }
.btn--icon { padding: 0; width: var(--tap-primary); min-height: var(--tap-primary); border-radius: var(--radius-full); }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--tap-gap); }

/* ---- App column --------------------------------------------------------- */
.app { max-width: var(--content-max); margin: 0 auto; min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }

/* ---- Header: Ten Five logo + TB<3 + readiness --------------------------- */
.appbar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  padding: var(--space-2) var(--space-4) var(--space-2) var(--space-2);
  padding-top: max(var(--space-2), env(safe-area-inset-top));
  background: var(--color-bg); position: sticky; top: 0; z-index: 3;
}
.brand { display: inline-flex; align-items: center; min-height: var(--tap-min); color: var(--color-text); text-decoration: none; border-radius: var(--radius-sm); }
.brand__logo { width: 40px; height: 40px; flex: none; filter: var(--logo-filter); }
.brand__name { font-size: var(--text-wordmark); font-weight: var(--font-weight-medium); letter-spacing: var(--tracking-title); font-variant-ligatures: none; margin-left: -2px; }
.brand__name .heart { color: var(--color-red); }
.appbar__right { position: relative; }

.stack { flex: 1; display: grid; grid-template-columns: minmax(0, 1fr); align-content: start; gap: var(--space-7); padding: var(--space-3) var(--space-4) var(--space-7); }

/* ---- Readiness ---------------------------------------------------------- */
.ready {
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: var(--tap-min); padding: 0 var(--space-4);
  border: 0; border-radius: var(--radius-full); background: var(--color-tint); color: var(--color-text);
  font-family: var(--font-mono); font-weight: var(--font-weight-medium); font-size: var(--text-label);
  letter-spacing: var(--tracking-label); text-transform: uppercase; cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out);
}
button.ready:hover, button.ready[aria-expanded="true"] { background: var(--color-tint-2); }
.ready svg, .picker svg.g { width: 10px; height: 10px; flex: none; fill: currentColor; }
.picker { display: grid; padding: var(--space-2); max-width: 18rem; background: var(--color-bg); border-radius: var(--radius-md); box-shadow: var(--shadow-float); }
.picker__opt {
  display: flex; align-items: center; gap: var(--space-3); min-height: var(--tap-min); padding: 0 var(--space-3);
  border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--color-text);
  font-family: var(--font-mono); font-weight: var(--font-weight-medium); font-size: var(--text-label);
  letter-spacing: var(--tracking-label); text-transform: uppercase; text-align: left; cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out);
}
.picker__opt:hover { background: var(--color-tint); }
.picker__opt .icon { margin-left: auto; visibility: hidden; }
.picker__opt[aria-checked="true"] .icon { visibility: visible; }
.picker__foot { padding: var(--space-2) var(--space-3) var(--space-1); }
.readypop { position: absolute; right: 0; top: calc(100% + var(--space-2)); z-index: 4; width: 16rem; }

/* ---- Open blocks (no frames) -------------------------------------------- */
.blockhead { display: grid; gap: var(--space-1); margin-bottom: var(--space-4); }
.title { font-size: var(--text-title); }
.reveal { animation: rise var(--duration-base) var(--ease-out) both; }

/* ---- Daily quote -------------------------------------------------------- */
.quote { margin: 0; display: grid; gap: var(--space-3); }
.marker { justify-self: start; background: var(--color-yellow); color: var(--color-on-yellow); padding: 2px var(--space-2); border-radius: 3px; }
.quote blockquote { margin: 0; font-size: var(--text-title); line-height: var(--leading-title); letter-spacing: var(--tracking-title); }
.quote figcaption { display: grid; gap: 2px; }
.quote__who { font-weight: var(--font-weight-medium); }
.verified { display: inline-flex; align-items: center; gap: 4px; vertical-align: middle; }
.verified .icon { width: 14px; height: 14px; }

/* ---- Workout ------------------------------------------------------------ */
.workout { display: grid; grid-template-columns: minmax(0, 1fr); }
.wblock { display: grid; gap: var(--space-1); margin-bottom: var(--space-5); }
.wblock__head { display: flex; align-items: baseline; gap: var(--space-3); }
.wblock__letter { width: 1rem; flex: none; }
.wblock__title { font-size: var(--text-body); font-weight: var(--font-weight-medium); letter-spacing: 0; }
.wblock__dur { margin-left: auto; white-space: nowrap; }
.ex { list-style: none; margin: 0; padding: 0 0 0 calc(1rem + var(--space-3)); display: grid; gap: var(--space-2); }
.ex > li { display: grid; gap: var(--space-2); }
.ex__row { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-3); }
.ex__rx { font-size: var(--text-caption); white-space: nowrap; }
.ex__note { display: block; }
.ticks { display: flex; flex-wrap: wrap; gap: var(--tap-gap); }
.tick {
  width: var(--tap-min); height: var(--tap-min); border: 1px solid var(--color-control); border-radius: var(--radius-full);
  background: transparent; color: var(--color-text); font-family: var(--font-mono); font-size: var(--text-caption);
  display: grid; place-items: center; cursor: pointer; padding: 0;
  transition: background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.tick:active { transform: scale(var(--press-scale)); }
.tick[aria-pressed="true"] { background: var(--ink-fill); color: var(--on-ink); border-color: var(--ink-fill); }
.tick .icon { display: none; }
.tick[aria-pressed="true"] .icon { display: block; }
.tick[aria-pressed="true"] .tick__n { display: none; }
.why { list-style: none; margin: var(--space-2) 0 0; padding: 0; display: grid; gap: var(--space-2); }
.compare { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: var(--space-2) var(--space-4); align-items: baseline; font-size: var(--text-caption); }
.workout[data-status="superseded"] .wblock, .workout[data-status="superseded"] .w-actions { display: none; }

/* ---- Chat thread -------------------------------------------------------- */
.thread { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-5); }
.thread:empty { display: none; }
.msg { display: grid; gap: var(--space-1); animation: rise var(--duration-base) var(--ease-out) both; min-width: 0; }
@keyframes rise { from { opacity: 0; transform: translateY(var(--motion-rise)); } to { opacity: 1; transform: none; } }
.msg--me { justify-self: end; max-width: 85%; }
.msg--me .bubble { background: var(--color-tint); padding: var(--space-2) var(--space-4); border-radius: var(--radius-md); white-space: pre-wrap; overflow-wrap: anywhere; }
.msg--me .meta { justify-self: end; }
.msg--write .bubble { box-shadow: inset var(--edge-accent) 0 0 var(--color-red); }
.prose { display: grid; gap: var(--space-3); overflow-wrap: anywhere; }
.prose ul, .prose ol { margin: 0; padding-left: var(--space-5); display: grid; gap: var(--space-1); }
.prose strong { font-weight: var(--font-weight-medium); }
.prose code { font-family: var(--font-mono); font-size: 0.9em; }
.offer { display: grid; gap: var(--space-2); margin-top: var(--space-2); }

/* ---- Write confirmation (open block) ------------------------------------ */
.obs { display: grid; gap: 2px; padding: var(--space-3) 0; }
.obs__top { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); }
.obs__edit {
  display: inline-flex; align-items: center; gap: var(--space-2); justify-self: start;
  min-height: var(--tap-min); max-width: 100%; padding: 0; background: transparent; border: 0; color: var(--color-text);
  font: inherit; font-size: 1.0625rem; font-weight: var(--font-weight-medium); text-align: left; cursor: pointer;
}
.obs__val { border-bottom: 1px dotted var(--color-control); }
.obs__edit .icon { color: var(--color-muted); }
.obs__state { display: none; align-items: center; gap: 4px; white-space: nowrap; }
.obs__state .icon { width: 14px; height: 14px; }
.obs[data-state="proposed"] .obs__state--proposed,
.obs[data-state="confirmed"] .obs__state--ok,
.obs[data-state="rejected"] .obs__state--no { display: inline-flex; }
.obs[data-state="confirmed"] .obs__state--ok { color: var(--color-text); }
.obs[data-state="rejected"] .obs__val { text-decoration: line-through; color: var(--color-muted); border-bottom-color: transparent; }
.obs:not([data-state="proposed"]) .obs__edit { pointer-events: none; }
.obs:not([data-state="proposed"]) .obs__edit .icon { visibility: hidden; }
.obs:not([data-state="proposed"]) .obs__val { border-bottom-color: transparent; }
.obs__act { margin-top: var(--space-1); }
.obs[data-state="proposed"] .obs__undo,
.obs:not([data-state="proposed"]) .obs__act,
.obs[data-committed="true"] .obs__undo,
.obs[data-editing="true"] .obs__act,
.obs[data-editing="true"] .obs__edit { display: none; }
.wfoot { display: grid; gap: var(--space-2); margin-top: var(--space-3); }

/* Inline value editor (Edit on a proposed observation) */
.editor { display: grid; gap: var(--space-3); margin-top: var(--space-1); }
.field { display: grid; gap: var(--space-1); }
.field input {
  min-height: var(--tap-min); padding: 0 var(--space-3); font: inherit; color: var(--color-text); background: var(--color-bg);
  border: 1px solid var(--color-control); border-radius: var(--radius-sm); width: 100%;
}
.field--check { display: flex; align-items: center; gap: var(--space-3); min-height: var(--tap-min); }
.field--check input { width: 22px; height: 22px; min-height: 0; margin: 0; accent-color: var(--ink-fill); }

/* ---- Status + error lines ----------------------------------------------- */
.status { min-height: 1.25rem; }
.error { display: inline-flex; align-items: flex-start; gap: var(--space-2); font-size: var(--text-caption); color: var(--color-text); }
.error .icon { color: var(--color-error-icon); }
.error strong { font-weight: var(--font-weight-bold); }
.errorblock { display: grid; gap: var(--space-1); justify-items: start; }

/* ---- Composer + Chat | Write switch (the one soft-tinted surface) ------- */
.composer {
  position: sticky; bottom: 0; z-index: 3; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-2);
  margin: 0 var(--space-2) var(--space-2); margin-bottom: max(var(--space-2), env(safe-area-inset-bottom)); padding: var(--space-3);
  background: var(--color-tint); border-radius: var(--radius-md);
}
.modeswitch { display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; justify-self: start; gap: 2px; padding: 3px; background: var(--color-bg); border-radius: var(--radius-full); }
.seg {
  min-height: var(--tap-min); min-width: 5.5rem; padding: 0 var(--space-4);
  border: 0; border-radius: var(--radius-full); background: transparent; color: var(--color-text);
  font: inherit; font-weight: var(--font-weight-medium); cursor: pointer;
  transition: background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out);
}
.seg[aria-checked="true"] { color: var(--color-on-fill); font-weight: var(--font-weight-bold); background: var(--ink-fill); }
.seg[aria-checked="true"][data-mode="chat"]  { background: var(--color-blue-fill); }
.seg[aria-checked="true"][data-mode="write"] { background: var(--color-red-fill); }
.inputrow { display: flex; gap: var(--tap-gap); align-items: flex-end; }
.inputrow textarea {
  flex: 1; width: 0; min-width: 0; min-height: var(--tap-primary); max-height: 10rem; resize: none;
  padding: var(--space-3); font: inherit; color: var(--color-text); background: var(--color-bg);
  border: 1px solid var(--color-control); border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast) var(--ease-out);
}
.composer[data-mode="write"] textarea { border-color: var(--color-red); }
.inputrow textarea::placeholder { color: var(--color-muted); opacity: 1; }

/* ---- Model selector (quiet: muted mono text button in the composer) ----- */
.composer__top { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.modelbtn {
  margin-left: auto; display: inline-flex; align-items: center; gap: var(--space-1);
  min-height: var(--tap-min); padding: 0 var(--space-3); border: 0; border-radius: var(--radius-sm);
  background: transparent; color: var(--color-muted);
  font-family: var(--font-mono); font-weight: var(--font-weight-medium); font-size: var(--text-label);
  letter-spacing: var(--tracking-label); text-transform: uppercase; cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}
.modelbtn:hover, .modelbtn[aria-expanded="true"] { background: var(--color-tint-2); color: var(--color-text); }
.modelbtn .icon { width: 14px; height: 14px; }
.modelpop { position: absolute; right: var(--space-3); bottom: calc(100% + var(--space-2)); z-index: 4; min-width: 15rem; }
.picker__opt--two { min-height: calc(var(--tap-min) + var(--space-2)); }
.opt__text { display: grid; gap: 2px; }
.opt__sub { font-family: var(--font-sans); text-transform: none; letter-spacing: 0; font-weight: 400; font-size: var(--text-caption); color: var(--color-muted); }

/* ---- Sign-in ------------------------------------------------------------ */
.signin { display: grid; gap: var(--space-5); align-content: start; padding: var(--space-8) var(--space-4); max-width: 26rem; }
.signin h1 { font-size: var(--text-display); }
.gbtn { min-height: var(--tap-primary); }
.foot { padding: 0 var(--space-4) var(--space-3); }