/* ============================================================================
   Pramāṇa POC — design tokens + bespoke styling layered on top of Tailwind CDN.
   Direction: "forensic ledger / instrument panel" — dark slate canvas, a single
   warm indigo→violet accent, monospace for evidentiary data (hashes / record IDs),
   editorial spacing, three sharply distinct verify states. Not a default template.
   ============================================================================ */

:root {
  /* Canvas + surfaces */
  --bg:            oklch(20% 0.018 270);
  --bg-deep:       oklch(16% 0.02 270);
  --surface:       oklch(25% 0.02 270);
  --surface-2:     oklch(29% 0.022 270);
  --surface-line:  oklch(40% 0.03 270 / 0.45);
  --surface-glow:  oklch(70% 0.16 285 / 0.10);

  /* Ink */
  --ink:           oklch(96% 0.01 270);
  --ink-soft:      oklch(80% 0.02 270);
  --ink-faint:     oklch(64% 0.02 270);

  /* Accent — Pramāṇa indigo→violet */
  --accent:        oklch(70% 0.17 288);
  --accent-bright: oklch(78% 0.17 290);
  --accent-deep:   oklch(54% 0.16 286);
  --accent-ink:    oklch(18% 0.03 286);

  /* Verdict semantics */
  --ok:            oklch(74% 0.17 152);
  --ok-deep:       oklch(50% 0.13 152);
  --ok-wash:       oklch(74% 0.17 152 / 0.12);
  --fail:          oklch(66% 0.21 22);
  --fail-deep:     oklch(48% 0.18 22);
  --fail-wash:     oklch(66% 0.21 22 / 0.12);
  --warn:          oklch(80% 0.15 78);
  --warn-deep:     oklch(58% 0.13 70);
  --warn-wash:     oklch(80% 0.15 78 / 0.12);
  --neutral:       oklch(64% 0.02 270);
  --neutral-wash:  oklch(64% 0.02 270 / 0.10);

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur:  220ms;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  background:
    radial-gradient(120% 80% at 50% -10%, var(--surface-glow), transparent 60%),
    radial-gradient(80% 60% at 100% 0%, oklch(60% 0.12 320 / 0.06), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.mono {
  font-family: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
  font-feature-settings: "zero" 1;
}

/* ---- Brand wordmark ---- */
.wordmark {
  letter-spacing: -0.02em;
}
.wordmark .glyph {
  color: var(--accent-bright);
}

/* ---- Hairline / etched divider ---- */
.hairline {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--surface-line), transparent);
}

/* ---- Card surface ---- */
.surface {
  background:
    linear-gradient(180deg, oklch(28% 0.02 270 / 0.6), oklch(24% 0.02 270 / 0.6));
  border: 1px solid var(--surface-line);
  border-radius: 18px;
  box-shadow:
    0 1px 0 oklch(100% 0 0 / 0.04) inset,
    0 24px 60px -30px oklch(0% 0 0 / 0.8);
}

/* ---- Eyebrow label ---- */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--ink-faint);
}

/* ---- Step pill ---- */
.step-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent-bright);
  background: oklch(70% 0.17 288 / 0.12);
  border: 1px solid oklch(70% 0.17 288 / 0.3);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
}

/* ---- Primary button ---- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: 12px;
  padding: 0.85rem 1.4rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              opacity var(--dur) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}

.btn-primary {
  color: var(--accent-ink);
  background: linear-gradient(180deg, var(--accent-bright), var(--accent-deep));
  box-shadow: 0 10px 28px -12px oklch(70% 0.17 288 / 0.7);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px -14px oklch(70% 0.17 288 / 0.85);
}
.btn-primary:active:not(:disabled) { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-ghost {
  color: var(--ink-soft);
  background: oklch(30% 0.02 270 / 0.5);
  border-color: var(--surface-line);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--accent-deep); background: var(--surface-2); }

/* ---- Nav tab ---- */
.nav-tab {
  position: relative;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink-faint);
  padding: 0.5rem 0.2rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.nav-tab:hover { color: var(--ink-soft); }
.nav-tab[aria-current="page"] { color: var(--ink); }
.nav-tab[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -0.55rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-bright), var(--accent-deep));
}
.nav-tab:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 4px; border-radius: 4px; }

/* ---- Inputs ---- */
.field {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--surface-line);
  border-radius: 12px;
  color: var(--ink);
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field::placeholder { color: var(--ink-faint); }
.field:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px oklch(70% 0.17 288 / 0.2);
}

/* ---- Dropzone ---- */
.dropzone {
  position: relative;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 0.4rem;
  border: 1.5px dashed var(--surface-line);
  border-radius: 16px;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 14px, oklch(100% 0 0 / 0.012) 14px, oklch(100% 0 0 / 0.012) 28px),
    var(--bg-deep);
  padding: 2.4rem 1.4rem;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.dropzone:hover { border-color: var(--accent-deep); }
.dropzone:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; }
.dropzone.is-drag {
  border-color: var(--accent-bright);
  background: oklch(70% 0.17 288 / 0.08);
  transform: scale(1.005);
}
.dropzone.has-file {
  border-style: solid;
  border-color: var(--accent-deep);
  background: oklch(70% 0.17 288 / 0.06);
}

/* Compact variant for the secondary copy-check panel */
.dropzone-compact { padding: 1.7rem 1.2rem; }

/* Read-only code field (QR landing: the code is fixed by the scanned QR) */
.field[readonly] {
  color: var(--ink-faint);
  background: oklch(18% 0.018 270);
  border-style: dashed;
  cursor: default;
}
.field[readonly]:focus { border-color: var(--surface-line); box-shadow: none; }

/* ---- Disclosure (secondary "check a copy you received" affordance) ---- */
.disclosure {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  cursor: pointer;
  color: var(--ink-soft);
  background: oklch(28% 0.02 270 / 0.4);
  border: 1px dashed var(--surface-line);
  border-radius: 16px;
  padding: 0.95rem 1.15rem;
  transition: border-color var(--dur) var(--ease),
              background var(--dur) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.disclosure:hover { border-color: var(--accent-deep); background: var(--surface); }
.disclosure:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; }
.disclosure[aria-expanded="true"] {
  border-style: solid;
  border-color: var(--accent-deep);
  background: var(--surface);
}
.disclosure .chev { transition: transform var(--dur) var(--ease); }
.disclosure[aria-expanded="true"] .chev { transform: rotate(180deg); }
.disclosure-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 12px;
  color: var(--accent-bright);
  background: oklch(70% 0.17 288 / 0.1);
  border: 1px solid oklch(70% 0.17 288 / 0.25);
}

/* ---- QR plate (projector-friendly) ---- */
.qr-plate {
  background: oklch(98% 0 0);
  border-radius: 16px;
  padding: 1.1rem;
  box-shadow: 0 20px 50px -24px oklch(0% 0 0 / 0.7), 0 0 0 1px oklch(0% 0 0 / 0.05) inset;
}
.qr-plate img { display: block; width: 100%; height: auto; image-rendering: pixelated; border-radius: 6px; }

/* ---- Verdict card states ---- */
.verdict {
  border-radius: 20px;
  border: 1px solid var(--surface-line);
  overflow: clip;
}
.verdict-bar { height: 6px; }
.verdict-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: grid; place-items: center;
  flex: none;
}

.verdict[data-color="green"]   { border-color: var(--ok-deep);   background: linear-gradient(180deg, var(--ok-wash), transparent); }
.verdict[data-color="green"]   .verdict-bar  { background: linear-gradient(90deg, var(--ok), var(--ok-deep)); }
.verdict[data-color="green"]   .verdict-headline { color: var(--ok); }
/* Prominent verified badge: larger, solid green, white tick, with a reveal pop. */
.verdict[data-color="green"]   .verdict-icon {
  width: 74px; height: 74px;
  border-radius: 18px;
  background: linear-gradient(180deg, var(--ok), var(--ok-deep));
  color: #fff;
  border: none;
  box-shadow: 0 14px 36px -12px var(--ok);
  animation: verified-pop 520ms cubic-bezier(0.2, 0.9, 0.3, 1.4) both;
}
@keyframes verified-pop {
  0%   { transform: scale(0.35); opacity: 0; }
  55%  { transform: scale(1.14); }
  100% { transform: scale(1); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .verdict[data-color="green"] .verdict-icon { animation: none; }
}

.verdict[data-color="red"]     { border-color: var(--fail-deep); background: linear-gradient(180deg, var(--fail-wash), transparent); }
.verdict[data-color="red"]     .verdict-bar  { background: linear-gradient(90deg, var(--fail), var(--fail-deep)); }
.verdict[data-color="red"]     .verdict-icon { background: var(--fail-wash); color: var(--fail); border: 1px solid var(--fail-deep); }
.verdict[data-color="red"]     .verdict-headline { color: var(--fail); }

.verdict[data-color="amber"]   { border-color: var(--warn-deep); background: linear-gradient(180deg, var(--warn-wash), transparent); }
.verdict[data-color="amber"]   .verdict-bar  { background: linear-gradient(90deg, var(--warn), var(--warn-deep)); }
.verdict[data-color="amber"]   .verdict-icon { background: var(--warn-wash); color: var(--warn); border: 1px solid var(--warn-deep); }
.verdict[data-color="amber"]   .verdict-headline { color: var(--warn); }

/* RECORD_NOT_FOUND is contract color "red" but we still keep a neutral fallback hook. */
.verdict[data-color="neutral"] { border-color: var(--surface-line); background: var(--neutral-wash); }
.verdict[data-color="neutral"] .verdict-bar  { background: var(--neutral); }
.verdict[data-color="neutral"] .verdict-icon { background: var(--neutral-wash); color: var(--ink-soft); border: 1px solid var(--surface-line); }
.verdict[data-color="neutral"] .verdict-headline { color: var(--ink); }

/* ---- Check rows (evidentiary detail) ---- */
.check-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
  border-top: 1px dashed var(--surface-line);
}
.check-row:first-child { border-top: none; }
.check-pass { color: var(--ok); }
.check-fail { color: var(--fail); }
.check-na   { color: var(--ink-faint); }

/* ---- Record list rows ---- */
.record-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid transparent;
  background: var(--bg-deep);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.record-row:hover { border-color: var(--accent-deep); transform: translateX(2px); background: var(--surface); }

/* ---- Scope banner (always shown with a verdict) ---- */
.scope-note {
  border-left: 3px solid var(--accent-deep);
  background: oklch(70% 0.17 288 / 0.07);
  border-radius: 0 10px 10px 0;
}

/* Copied-QR caution: a scan alone never vouches for the video carrying the code */
.caution-note {
  border-left: 3px solid var(--warn);
  background: oklch(80% 0.15 78 / 0.08);
  border-radius: 0 10px 10px 0;
}

/* ---- Spinner ---- */
.spinner {
  width: 1.05em; height: 1.05em;
  border: 2px solid oklch(100% 0 0 / 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Reveal animation for result/result cards ---- */
.reveal { animation: reveal var(--dur) var(--ease) both; }
@keyframes reveal {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 5.5rem;
  transform: translateX(-50%) translateY(1rem);
  background: var(--surface-2);
  border: 1px solid var(--surface-line);
  color: var(--ink);
  padding: 0.7rem 1.1rem;
  border-radius: 12px;
  box-shadow: 0 18px 40px -18px oklch(0% 0 0 / 0.8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  z-index: 60;
  font-size: 0.88rem;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* Keep auto-scrolled cards clear of the sticky header */
#verify-result-slot, #verify-form-slot, #copycheck-panel {
  scroll-margin-top: 5rem;
}

/* Hide helper */
[hidden] { display: none !important; }

/* ---- Full-screen verification splash (QR landings only) ----
   Shown pre-paint via html.has-splash (inline gate in verify.html); verify.js
   drives data-phase: checking -> ok | fail, then .leave to dissolve. */
#verify-splash { display: none; }
html.has-splash #verify-splash {
  display: grid;
  place-items: center;
  position: fixed;
  inset: 0;
  z-index: 100;
  text-align: center;
  background:
    radial-gradient(120% 90% at 50% 0%, oklch(24% 0.045 286) 0%, var(--bg-deep) 52%, oklch(12% 0.02 270) 100%);
  transition: opacity 0.55s var(--ease), visibility 0.55s;
}
html.has-splash body { overflow: hidden; }
#verify-splash.leave { opacity: 0; visibility: hidden; pointer-events: none; }

.splash-inner {
  display: grid;
  justify-items: center;
  padding: clamp(1rem, 4vmin, 8rem);
  max-width: 92vw;
}

.splash-badge {
  position: relative;
  width: clamp(5.5rem, 26vmin, 72rem);
  height: clamp(5.5rem, 26vmin, 72rem);
  display: grid;
  place-items: center;
}
#verify-splash[data-phase="found"] .splash-badge,
#verify-splash[data-phase="fail"] .splash-badge {
  animation: splash-pop 0.55s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes splash-pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.09); }
  100% { transform: scale(1); }
}

.splash-ring { position: absolute; inset: 0; width: 100%; height: 100%; }
.ring-track { stroke: var(--surface-line); stroke-width: 2; }
.ring-arc {
  stroke: var(--accent-bright);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 0.22 0.78;
  transform-origin: 50% 50%;
  animation: splash-orbit 1.1s linear infinite;
}
@keyframes splash-orbit { to { transform: rotate(360deg); } }
.ring-done {
  stroke: var(--accent-bright);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}
#verify-splash[data-phase="found"] .ring-arc,
#verify-splash[data-phase="fail"] .ring-arc { opacity: 0; transition: opacity 0.25s var(--ease); }
#verify-splash[data-phase="found"] .ring-done { animation: splash-draw 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.05s forwards; }
#verify-splash[data-phase="fail"] .ring-done { stroke: var(--fail); animation: splash-draw 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.05s forwards; }
@keyframes splash-draw { to { stroke-dashoffset: 0; } }

.splash-shield {
  width: clamp(2.2rem, 10.5vmin, 30rem);
  height: clamp(2.2rem, 10.5vmin, 30rem);
  color: var(--accent-bright);
  transition: color 0.35s var(--ease), filter 0.35s var(--ease);
}
.shield-tick, .shield-cross { stroke-dasharray: 1; stroke-dashoffset: 1; }
#verify-splash[data-phase="found"] .splash-shield {
  filter: drop-shadow(0 0 clamp(12px, 3.6vmin, 90px) oklch(70% 0.17 288 / 0.5));
}
#verify-splash[data-phase="fail"] .splash-shield {
  color: var(--fail);
  filter: drop-shadow(0 0 clamp(12px, 3.6vmin, 90px) oklch(66% 0.21 22 / 0.4));
}
#verify-splash[data-phase="fail"] .cross-a { animation: splash-draw 0.28s ease-out 0.3s forwards; }
#verify-splash[data-phase="fail"] .cross-b { animation: splash-draw 0.28s ease-out 0.5s forwards; }
/* Scan landing = verified: green ring + green shield with a drawn checkmark. */
#verify-splash[data-phase="found"] .ring-done { stroke: var(--ok); }
#verify-splash[data-phase="found"] .splash-shield {
  color: var(--ok);
  filter: drop-shadow(0 0 clamp(12px, 3.6vmin, 90px) oklch(72% 0.19 150 / 0.45));
}
#verify-splash[data-phase="found"] .shield-tick { animation: splash-draw 0.3s ease-out 0.4s forwards; }

.splash-ripple {
  position: absolute;
  inset: 0;
  border-radius: 9999px;
  border: 1px solid var(--accent-bright);
  opacity: 0;
  pointer-events: none;
}
#verify-splash[data-phase="fail"] .splash-ripple { border-color: var(--fail); }
#verify-splash[data-phase="found"] .splash-ripple,
#verify-splash[data-phase="fail"] .splash-ripple { animation: splash-ripple 1s ease-out 0.35s forwards; }
#verify-splash[data-phase="found"] .splash-ripple-2,
#verify-splash[data-phase="fail"] .splash-ripple-2 { animation-delay: 0.6s; }
@keyframes splash-ripple {
  from { opacity: 0.5; transform: scale(1); }
  to { opacity: 0; transform: scale(1.6); }
}

.splash-status {
  font-size: clamp(0.92rem, 2.6vmin, 7rem);
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.3s var(--ease);
}
#verify-splash[data-phase="found"] .splash-status,
#verify-splash[data-phase="fail"] .splash-status {
  font-size: clamp(1.1rem, 4.2vmin, 11.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.splash-sub {
  font-size: clamp(0.8rem, 2.3vmin, 6.2rem);
  color: var(--ink-soft);
  min-height: 1.35em;
}
.splash-note {
  font-size: clamp(0.72rem, 1.6vmin, 4.4rem);
  color: var(--ink-faint);
  max-width: min(28em, 85vw);
  line-height: 1.6;
}

/* Vertical rhythm + wordmark scale with the viewport too (overrides the fixed
   Tailwind mt-* utilities in the splash markup; landscape compression below
   still wins by order). */
.splash-inner > .wordmark {
  margin-top: clamp(1rem, 3.4vmin, 9rem);
  font-size: clamp(1.25rem, 3.2vmin, 8.5rem);
}
.splash-inner > .splash-status { margin-top: clamp(0.75rem, 2.2vmin, 6rem); }
.splash-inner > .splash-sub { margin-top: clamp(0.375rem, 0.9vmin, 2.5rem); }
.splash-inner > .splash-note { margin-top: clamp(1rem, 3.4vmin, 9rem); }

/* Short viewports (landscape phones): compress vertical rhythm so the whole
   splash fits without scrolling. */
@media (max-height: 480px) {
  .splash-inner > .wordmark { margin-top: 0.75rem; }
  .splash-inner > .splash-status { margin-top: 0.5rem; }
  .splash-inner > .splash-note { margin-top: 0.75rem; }
}

/* ---- Adaptive verify layout (body[data-mode] set by verify.js) ----
   Phones: single column, source order (result above form).
   Desktop QR landing: registered original / result in the wide column,
   copy-check + guidance sticky beside it.
   Manual visits: focused centered column at any width. */
@media (min-width: 1024px) {
  body[data-mode="qr"] #layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }
  body[data-mode="qr"] #col-side {
    position: sticky;
    top: 5.5rem;
  }
  body[data-mode="qr"] #verify-result-slot { margin-bottom: 0; }
}
body[data-mode="manual"] #page-intro,
body[data-mode="manual"] #layout {
  max-width: 42rem;
  margin-inline: auto;
}

/* Proportional upscale on very large panels (4K/8K TVs, projectors): the
   layout is rem-based, so scaling the root font grows the whole composition
   instead of leaving a fixed-width strip in an ocean of background.
   Starts at 2560 so ordinary 1440p/1920p desktops keep the standard 16px UI;
   0.625vw is continuous at the boundary (0.625 * 2560 = 16px). */
@media (min-width: 2560px) {
  html { font-size: clamp(16px, 0.625vw, 34px); }
}