/* Cascade Design System v1.0 · components
 * The 14 components, no more. Built on tokens.css. If a design needs a fifteenth,
 * that is a conversation before it is a commit. Radii: buttons 3px, inner 2px,
 * pills 100px — no others. One border weight (1px) throughout.
 *
 * Colour vocabulary (enforced): cyan = decided/verified, sand = physical/held/
 * waiting, alert red = a FAILED check ONLY. Ink surfaces carry evidence.
 */

/* ============ 1 · BUTTON — 3 variants × 4 states ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 500 12.5px var(--font-sans); padding: 11px 18px; border-radius: var(--radius-btn);
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: background var(--t-state) var(--ease), border-color var(--t-state) var(--ease);
}
.btn:disabled, .btn[aria-disabled="true"] { cursor: default; }
/* primary · ink on paper */
.btn--primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--primary:hover { background: #22242C; border-color: #22242C; }
.btn--primary:focus-visible { outline: none; border-color: var(--cyan); }
.btn--primary:disabled { opacity: .35; }
/* secondary · outline */
.btn--secondary { background: transparent; color: var(--ink); border-color: rgba(10,11,15,.26); }
.btn--secondary:hover { background: #F4EFE5; border-color: var(--ink); }
.btn--secondary:focus-visible { outline: none; border-color: var(--teal); }
.btn--secondary:disabled { color: var(--mid); border-color: rgba(10,11,15,.14); }
/* accent · on ink surfaces only */
.btn--accent { background: var(--cyan); color: var(--ink); border-color: var(--cyan); }
.btn--accent:hover { background: #96DCEF; border-color: #96DCEF; }
.btn--accent:disabled { opacity: .35; }
/* danger · a destructive/failed action (rare) */
.btn--danger { background: var(--alert); color: var(--paper); border-color: var(--alert); }

/* ============ 2 · STATUS PILL — 6 meanings (a fact, never an instruction) ============ */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 9.5px var(--font-mono); letter-spacing: .08em; text-transform: uppercase;
  padding: 5px 10px; border-radius: var(--radius-pill); border: 1px solid; white-space: nowrap;
}
.pill--verified  { color: var(--teal); background: rgba(123,211,234,.16); border-color: rgba(27,85,102,.4); }
.pill--verifying { color: var(--sand-deep); background: rgba(233,190,148,.20); border-color: rgba(138,90,43,.4); }
.pill--contested { color: var(--alert); background: rgba(179,52,31,.10); border-color: rgba(179,52,31,.45); }
.pill--held      { color: var(--sand-deep); background: rgba(233,190,148,.20); border-color: rgba(138,90,43,.4); }
.pill--archived  { color: var(--mid); background: transparent; border-color: rgba(10,11,15,.2); }
.pill--planned   { color: var(--sand-deep); background: transparent; border-color: rgba(138,90,43,.35); }

/* ============ 3 · METRIC TILE — 3 tones (one INK tile per screen, for the hero zero) ============ */
.tile { border: 1px solid var(--hairline); background: var(--paper); padding: 15px 17px; }
.tile__num { font: 600 clamp(21px,3vw,30px) var(--font-sans); letter-spacing: -.024em; color: var(--ink); font-variant-numeric: tabular-nums; }
.tile__lbl { margin-top: 4px; font: 400 9px var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--mid); }
.tile--contested { background: rgba(179,52,31,.06); border-color: rgba(179,52,31,.4); }
.tile--contested .tile__num { color: var(--alert); }
.tile--ink { background: var(--ink); border-color: var(--ink); }               /* the proud zero */
.tile--ink .tile__num { color: var(--paper); }
.tile--ink .tile__lbl { color: var(--dim-on-ink); }

/* ============ 4 · TOGGLE — on / off / locked ============ */
.toggle { width: 34px; height: 18px; border-radius: var(--radius-pill); background: rgba(10,11,15,.24); position: relative; display: inline-block; flex: none; transition: background var(--t-state) var(--ease); }
.toggle__knob { position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--paper); transition: left var(--t-state) var(--ease); }
.toggle--on { background: var(--teal); } .toggle--on .toggle__knob { left: 18px; }
.toggle--locked { background: var(--ink); } .toggle--locked .toggle__knob { left: 18px; background: var(--cyan); }

/* ============ 5 · FIELD — default / focus / error / read-only ============ */
.field__label { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 6px; }
.field__label > .k { font: 400 9px var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--mid); }
.field__label > .hint { font: 400 10.5px var(--font-mono); color: var(--mid); }
.field__input { display: block; width: 100%; border: 1px solid rgba(10,11,15,.2); background: var(--paper); padding: 11px 13px; font: 500 13px var(--font-sans); color: var(--ink); border-radius: var(--radius-inner); }
.field__input:focus, .field--focus .field__input { outline: none; border-color: var(--ink); }
.field--error .field__input { border-color: rgba(179,52,31,.5); }
.field--error .hint { color: var(--alert); }
.field--readonly .field__input { background: #F4EFE5; font-family: var(--font-mono); }
.field--mono .field__input { font-family: var(--font-mono); }

/* ============ 6 · EVIDENCE PANEL — the signature component (ink shell, any signed artefact) ============ */
.evidence { background: var(--ink); border: 1px solid rgba(10,11,15,.2); padding: 18px; color: var(--paper); }
.evidence__head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.evidence__mark { width: 30px; height: 30px; border: 1.5px solid var(--cyan); border-radius: 50%; display: grid; place-items: center; flex: none; }
.evidence__mark::after { content: ""; width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; }
.evidence__kicker { font: 500 9.5px var(--font-mono); letter-spacing: .14em; color: var(--mid-on-ink); }
.evidence__verdict { font: 600 20px var(--font-sans); color: var(--cyan); letter-spacing: -.02em; margin-top: 3px; }
.evidence__hashbox { border: 1px solid var(--cyan); padding: 11px 13px; }
.evidence__hash { font: 500 12px var(--font-mono); color: var(--cyan); word-break: break-all; }

/* ============ 7 · TOP NAV ============ */
.nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding: 20px var(--gutter); border-bottom: 1px solid rgba(10,11,15,.1); }
.nav__brand { display: flex; align-items: center; gap: 11px; color: var(--ink); }
.nav__mark { width: 18px; height: 18px; border: 1.5px solid var(--ink); border-radius: 50%; display: grid; place-items: center; }
.nav__mark::after { content: ""; width: 6px; height: 6px; background: var(--ink); border-radius: 50%; animation: casc-pulse 2.4s ease-in-out infinite; }
.nav__wordmark { font: 600 13px var(--font-sans); letter-spacing: .13em; color: var(--ink); }
.nav__links { display: flex; gap: 24px; font: 500 12.5px var(--font-sans); }
.nav__link { color: var(--mid); }
.nav__link--current { color: var(--ink); border-bottom: 1.5px solid var(--ink); padding-bottom: 2px; }

/* ============ 8 · SUB-NAV CHIP ROW ============ */
.chiprow { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font: 500 10.5px var(--font-mono); letter-spacing: .04em; text-transform: uppercase; color: var(--ink); background: transparent; border: 1px solid rgba(10,11,15,.2); padding: 6px 12px; border-radius: var(--radius-pill); cursor: pointer; }
.chip--selected { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.chip--alert { color: var(--alert); border-color: rgba(179,52,31,.4); }   /* keeps its colour unselected — findable */

/* ============ 9 · PANEL SHELL — the most used component ============ */
.panel { border: 1px solid var(--hairline); background: var(--paper); }
.panel__head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 13px 16px; background: var(--paper-deep); border-bottom: 1px solid rgba(10,11,15,.14); }
.panel__label { font: 500 9.5px var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mid); }
.panel__meta { font: 400 10.5px var(--font-mono); color: var(--teal); }
.panel__body { padding: 16px; font: 400 13px var(--font-sans); color: var(--ink); }
.panel__foot { padding: 12px 16px; background: #F8F4EC; font: 400 11.5px var(--font-mono); color: var(--mid); }   /* the honest caveat */

/* ============ 10 · TABLE ROW — minmax(0,1fr) auto, never fixed tracks ============ */
.trow { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 16px; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--hairline-soft); background: var(--paper); }
.trow:nth-child(even) { background: var(--paper-alt); }
.trow--alert { background: rgba(179,52,31,.045); }                          /* whole-row tint on a contested row */
.trow__title { font: 600 13.5px var(--font-sans); color: var(--ink); }
.trow__mono { font: 400 11px var(--font-mono); color: var(--teal); margin-top: 3px; }

/* ============ 11 · CODE BLOCK — ink surface, lang bar, result strip ============ */
.code { background: var(--ink); border: 1px solid rgba(10,11,15,.2); }
.code__bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 14px; border-bottom: 1px solid rgba(251,248,242,.14); }
.code__lang { font: 500 9px var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--mid-on-ink); }
.code__copy { font: 400 9.5px var(--font-mono); color: var(--cyan); cursor: pointer; }
.code pre { margin: 0; padding: 16px 14px; font: 400 12px/1.7 var(--font-mono); color: rgba(251,248,242,.88); overflow: auto; white-space: pre; }
.code__result { border-top: 1px solid rgba(251,248,242,.14); padding: 11px 14px; font: 400 10.5px var(--font-mono); color: var(--cyan); }  /* the real response, 0 tokens — an argument */

/* ============ 12 · CALLOUT — 4 tones (left rule, no icon, no box) ============ */
.callout { border-left: 2px solid var(--teal); background: rgba(123,211,234,.08); padding: 12px 15px; }
.callout__label { font: 500 9.5px var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--teal); margin-bottom: 5px; }
.callout__body { font: 400 13px/1.55 var(--font-sans); color: var(--ink); }
.callout--info { border-left-color: var(--teal); background: rgba(123,211,234,.08); }
.callout--point { border-left-color: var(--teal); background: rgba(123,211,234,.10); }
.callout--watch { border-left-color: var(--sand-deep); background: rgba(233,190,148,.12); }
.callout--watch .callout__label { color: var(--sand-deep); }
.callout--limit { border-left-color: var(--alert); background: rgba(179,52,31,.06); }
.callout--limit .callout__label { color: var(--alert); }

/* ============ 13 · OVERLAY — palette / drawer / toast (one open at a time) ============ */
.overlay-backdrop { position: fixed; inset: 0; background: rgba(10,11,15,.5); z-index: 40; }
.palette { position: fixed; top: 12vh; left: 50%; transform: translateX(-50%); width: min(620px,92vw); background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--radius-inner); z-index: 41; }
.drawer { position: fixed; top: 0; right: 0; bottom: 0; width: 390px; max-width: 92vw; background: var(--paper); border-left: 1px solid var(--hairline); z-index: 41; }
.toaststack { position: fixed; right: 20px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 42; }
.toast { background: var(--card, #fff); border: 1px solid var(--hairline); border-left: 2px solid var(--teal); border-radius: var(--radius-inner); padding: 12px 14px; font: 400 12.5px var(--font-sans); color: var(--ink); }
.toast--error { border-left-color: var(--alert); }

/* ============ 14 · SYSTEM STATES — skeleton / empty / inline error ============ */
.skeleton { background: linear-gradient(90deg, rgba(10,11,15,.05), rgba(10,11,15,.10), rgba(10,11,15,.05)); background-size: 200% 100%; animation: casc-shimmer 1.4s linear infinite; border-radius: var(--radius-inner); }
@keyframes casc-shimmer { to { background-position: -200% 0 } }
@media (prefers-reduced-motion: reduce) { .skeleton { animation: none; } }
.empty { border: 1px dashed rgba(10,11,15,.26); background: #F8F4EC; padding: 64px 40px; text-align: center; }   /* empty is a legitimate state — the product working */
.empty__title { font: 700 clamp(22px,3vw,32px)/1.12 var(--font-sans); letter-spacing: -.028em; color: var(--ink); margin: 0 0 10px; }
.inline-error { border-left: 2px solid var(--sand-deep); background: rgba(233,190,148,.12); padding: 12px 15px; font: 400 13px/1.55 var(--font-sans); color: var(--ink); }
/* a HOLD / fallback is sand, not red. Red (.inline-error--fail) is only for a failed check. */
.inline-error--fail { border-left-color: var(--alert); background: rgba(179,52,31,.06); }