/* =========================================================================
   NHS Waitlist Validation (SMS page) — styles.css
   Same design system as the Patient Hub portal: official NHS palette + WCAG 2.2
   AA rules (NHS Digital Service Manual aesthetic). Calm, spacious, high-end.

   Built to ALIGN WITH the NHS Service Manual + WCAG 2.2 AA — not an accredited
   NHS product. Logo is a placeholder; real NHS identity needs brand permission.
   Contrast ratios are developer-measured against AA; confirm in a formal audit.

   Light-only by design (Service Manual). `color-scheme: light` keeps native
   controls light even on a dark-OS device.
   ========================================================================= */

:root {
  /* ---- Official NHS palette (shared with portal/) --------------------- */
  --nhs-blue:        #005EB8;  /* primary / accent. On white ≈ 5.6:1 (AA). */
  --nhs-dark-blue:   #003087;  /* hover/active. On white ≈ 10.9:1. */
  --nhs-black:       #212B32;  /* body text. On white ≈ 14.5:1. */
  --nhs-grey-1:      #4C6272;  /* secondary text. On white ≈ 6.0:1 (AA). */
  --nhs-pale-grey:   #E8EDEE;  /* page background. */
  --nhs-mid-grey:    #AEB7BD;  /* borders/dividers (decorative). */
  --nhs-white:       #FFFFFF;  /* elevated cards. */
  --nhs-green:       #007F3B;  /* success / "still need it". On white ≈ 5.1:1. */
  --nhs-warm-yellow: #FFB81C;  /* warning / "symptoms worse" (decorative accent). */
  --nhs-red:         #DA291C;  /* destructive / error. White-on-red ≈ 4.8:1 (AA). */
  --nhs-yellow:      #FFEB3B;  /* focus indicator. */

  /* Semantic aliases */
  --ink:        var(--nhs-black);
  --ink-soft:   var(--nhs-grey-1);
  --line:       #D8DDE0;
  --surface:    var(--nhs-white);
  --canvas:     var(--nhs-pale-grey);
  --focus:      var(--nhs-yellow);

  /* Per-choice accent (decorative bar; meaning is carried by the text label) */
  --affirm:     var(--nhs-green);
  --urgent:     var(--nhs-warm-yellow);
  --decline:    var(--nhs-red);

  /* ---- Soft-UI shadows ----------------------------------------------- */
  --shadow:      0 1px 2px rgba(33,43,50,.06), 0 6px 18px rgba(33,43,50,.08);
  --shadow-lift: 0 2px 6px rgba(33,43,50,.10), 0 14px 34px rgba(33,43,50,.14);

  /* ---- Radius / motion / touch --------------------------------------- */
  --radius:     8px;           /* cards / choices (per Service Manual) */
  --radius-lg:  12px;          /* hero container */
  --radius-sm:  6px;
  --ease:       cubic-bezier(.2,.7,.2,1);
  --tap:        48px;          /* minimum touch target (elderly-friendly) */

  --font: "Inter", Arial, -apple-system, BlinkMacSystemFont, "Segoe UI",
          Roboto, Helvetica, sans-serif;

  color-scheme: light;
}

/* ---- Reset ------------------------------------------------------------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

/* The [hidden] attribute must always win (author display rules below would
   otherwise leak the hidden question/confirm/success states). */
[hidden] { display: none !important; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--canvas);
  /* Fluid base type — comfortable for older eyes; everything scales from here. */
  font-size: clamp(1.0625rem, 0.98rem + 0.45vw, 1.1875rem);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- Skip link (WCAG 2.4.1) — visible only on focus -------------------- */
.skip-link {
  position: absolute; left: 12px; top: -64px; z-index: 30;
  padding: 12px 16px; background: var(--surface); color: var(--ink);
  border-radius: var(--radius-sm); text-decoration: none; font-weight: 600;
  box-shadow: var(--shadow); transition: top .15s var(--ease);
}
.skip-link:focus-visible { top: 12px; }

/* ---- Demo notice (public demonstration deploys only) --------------------
   Revealed by app.js when window.__ENV.DEMO_MODE is set (never on a trust
   deployment). White on NHS blue ≈ 5.6:1 (AA at body size). In normal flow,
   not sticky — it must inform without covering the question or the 999
   advisory on small screens. */
.demo-ribbon {
  background: var(--nhs-blue);
  color: var(--nhs-white);
  text-align: center;
  font-size: 0.9375rem;
  line-height: 1.5;
  padding: 10px 16px;
}
.demo-ribbon strong {
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---- Global focus indicator (WCAG 2.2) --------------------------------
   NHS-style: yellow outer outline + black ring, visible on any surface.
   Never outline:none without a high-contrast replacement. */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--nhs-yellow);
  outline-offset: 3px;
  box-shadow: 0 0 0 3px var(--nhs-black);
  border-radius: 4px;
}

/* Containers focused programmatically (confirm gate, success) are focused only
   to ANNOUNCE — they are not controls, so suppress the ring. */
#confirm:focus, #confirm:focus-visible,
#success:focus, #success:focus-visible { outline: none; box-shadow: none; }

/* ---- Layout shell (mobile-first) -------------------------------------- */
.stage {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  gap: 18px;
  padding: clamp(20px, 5vw, 44px) clamp(16px, 4vw, 28px);
  padding-top: max(24px, env(safe-area-inset-top));
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

.card {
  width: 100%; max-width: 520px; margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(26px, 7vw, 44px);
}

/* ---- Brand ------------------------------------------------------------- */
.brand { margin-bottom: 26px; }
.brand__mark { color: var(--nhs-blue); width: 68px; }   /* blue box, white "NHS" */
.brand__mark svg { display: block; width: 100%; height: auto; }
.brand__trust { margin-top: 12px; font-size: .9375rem; font-weight: 600; color: var(--ink-soft); }

/* ---- Type -------------------------------------------------------------- */
.eyebrow {
  font-size: .8125rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .12em; color: var(--ink-soft); margin-bottom: 14px;
}
.headline {
  font-size: clamp(1.7rem, 1.2rem + 2.6vw, 2.3rem); line-height: 1.14;
  letter-spacing: -0.02em; font-weight: 700; color: var(--ink); margin-bottom: 16px;
}
.headline em { font-style: normal; color: var(--nhs-blue); }   /* NHS-blue accent */
.lede { font-size: 1.0625rem; color: var(--ink-soft); max-width: 44ch; margin-bottom: 28px; }

/* ---- Choice cards (full-width, selectable) ---------------------------- */
.actions { display: flex; flex-direction: column; gap: 12px; }

.choice {
  --accent: var(--decline);
  display: flex; align-items: center; gap: 16px;
  width: 100%; min-height: var(--tap);
  text-align: left; cursor: pointer;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-family: inherit; color: var(--ink);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
              border-color .18s var(--ease);
}
/* Decorative accent bar (the text label carries the meaning, not the colour). */
.choice::before {
  content: ""; width: 5px; align-self: stretch; border-radius: 999px;
  background: var(--accent); flex: 0 0 auto;
}
.choice__body { display: flex; flex-direction: column; gap: 3px; flex: 1; }
.choice__title { font-size: 1.0625rem; font-weight: 700; letter-spacing: -.01em; }
.choice__note  { font-size: .9375rem; color: var(--ink-soft); }
.choice__chevron {
  font-size: 1.2rem; color: var(--nhs-blue);
  opacity: 0; transform: translateX(-6px);
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.choice--affirm  { --accent: var(--affirm); }
.choice--urgent  { --accent: var(--urgent); }
.choice--decline { --accent: var(--decline); }

@media (hover: hover) {
  .choice:hover {
    transform: translateY(-2px); box-shadow: var(--shadow-lift);
    border-color: var(--nhs-blue);
  }
  .choice:hover .choice__chevron { opacity: 1; transform: translateX(0); }
}
/* Reveal the chevron on keyboard focus too (parity with hover). */
.choice:focus-visible .choice__chevron { opacity: 1; transform: translateX(0); }
.choice:active { transform: translateY(0) scale(.992); }

/* Busy / disabled */
.choice[aria-busy="true"] .choice__chevron { opacity: 1; transform: none; animation: spin .7s linear infinite; }
.choice:disabled { cursor: not-allowed; opacity: .5; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Error / alert (solid NHS red, white text ≈ 4.8:1) ---------------- */
.error {
  margin-top: 18px; padding: 14px 16px; font-size: 1rem; font-weight: 500;
  color: #fff; background: var(--nhs-red); border-radius: var(--radius-sm);
}

/* ---- "Is this genuine?" footnote -------------------------------------
   Answers a documented problem rather than a hypothetical one: Healthwatch County
   Durham (2 Jul 2026) recorded patients receiving an NHS text with a link and being
   unable to tell it from a scam, because there is no branding. It sits BELOW the
   choices and is deliberately quiet - a suspicious reader should find it, but it must
   not compete with the question itself or imply the page is asking for something.
   NHS grey-1 on the pale-grey page stays above the AA floor. */
.verify {
  margin-top: 28px; padding-top: 18px;
  border-top: 1px solid var(--nhs-mid-grey);
  font-size: .9375rem; line-height: 1.55;
  color: var(--ink-soft); max-width: 48ch;
}
.verify strong { color: var(--ink); font-weight: 600; }

/* ---- Confirmation gate (destructive-action mitigation) ---------------- */
.confirm { animation: rise .4s var(--ease) both; }
.confirm__title {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 1.9rem); line-height: 1.15;
  font-weight: 700; letter-spacing: -.02em; margin: 6px 0 12px;
}
.confirm__text { font-size: 1.0625rem; color: var(--ink-soft); max-width: 44ch; margin-bottom: 24px; }

/* ---- Success ----------------------------------------------------------- */
.success { text-align: center; padding: 12px 0 4px; }
.success__tick { width: 64px; height: 64px; margin: 0 auto 22px; }
.success__tick svg { width: 100%; height: 100%; }
.success__ring {
  stroke: var(--nhs-green); stroke-width: 2.5;
  stroke-dasharray: 151; stroke-dashoffset: 151;
  animation: ring .5s var(--ease) forwards;
}
.success__check {
  stroke: var(--nhs-green); stroke-width: 3.5;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 44; stroke-dashoffset: 44;
  animation: check .35s var(--ease) .4s forwards;
}
@keyframes ring  { to { stroke-dashoffset: 0; } }
@keyframes check { to { stroke-dashoffset: 0; } }

.success__title {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 1.9rem);
  font-weight: 700; letter-spacing: -.02em; margin-bottom: 8px;
}
.success__text   { font-size: 1.0625rem; color: var(--ink); }
.success__detail { font-size: .9375rem; color: var(--ink-soft); margin-top: 12px; }

/* ---- Footer ------------------------------------------------------------ */
.legal { max-width: 520px; margin: 0 auto; text-align: center; }
.legal p { font-size: .8125rem; color: var(--ink-soft); max-width: 40ch; margin: 0 auto; }

/* ---- View transition --------------------------------------------------- */
.question, .success { animation: rise .4s var(--ease) both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ---- Larger screens ---------------------------------------------------- */
@media (min-width: 600px) {
  .card { padding: 48px; }
  .choice { padding: 18px 22px; }
}

/* ---- Respect reduced motion ------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

/* ---- Windows High Contrast / forced-colors ---------------------------- */
@media (forced-colors: active) {
  .choice { border: 2px solid currentColor; }
  .card { border: 1px solid currentColor; }
  :where(a, button, summary, [tabindex]):focus-visible { outline: 3px solid Highlight; }
}