Gym — Digital Membership Card

:root {
  --bg: #0d0f12;
  --surface: #15181d;
  --surface-2: #1d2127;
  --elevated: #23282f;
  --ink: #f4f6f8;
  --ink-2: #c2c8d0;
  --muted: #8b929c;
  --neon: #c6ff3a;
  --neon-d: #a6e016;
  --neon-50: rgba(198, 255, 58, 0.12);
  --orange: #ff6a2b;
  --orange-soft: rgba(255, 106, 43, 0.14);
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.16);
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 18px 50px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(198, 255, 58, 0.08), transparent 60%),
    radial-gradient(800px 500px at 0% 110%, rgba(255, 106, 43, 0.08), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: 540px;
  margin: 0 auto;
  padding: 28px 20px 56px;
}

/* ---------- topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}

.brandmark {
  display: flex;
  align-items: center;
  gap: 9px;
}

.bolt,
.brand__bolt {
  width: 16px;
  height: 16px;
  background: var(--neon);
  clip-path: polygon(45% 0, 100% 0, 55% 45%, 100% 45%, 20% 100%, 45% 55%, 0 55%);
  box-shadow: 0 0 14px var(--neon-50);
}

.brandmark__txt {
  font-weight: 900;
  letter-spacing: 0.14em;
  font-size: 15px;
}

.eyebrow {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

/* ---------- stage ---------- */
.stage {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card-scene {
  width: 100%;
  perspective: 1600px;
}

/* ---------- card ---------- */
.card {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1.586 / 1;
  border: none;
  padding: 0;
  margin: 0;
  background: transparent;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: var(--r-lg);
  outline: none;
}

.card.is-flipped {
  transform: rotateY(180deg);
}

.card:focus-visible {
  box-shadow: 0 0 0 3px var(--neon), 0 0 0 6px rgba(198, 255, 58, 0.25);
}

.card__face {
  position: absolute;
  inset: 0;
  border-radius: var(--r-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-2);
}

/* FRONT */
.card__front {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  background:
    linear-gradient(135deg, var(--elevated) 0%, var(--surface-2) 55%, #0f1216 100%);
}

.card__front::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px 220px at 110% -20%, rgba(198, 255, 58, 0.16), transparent 60%),
    radial-gradient(360px 200px at -10% 120%, rgba(255, 106, 43, 0.12), transparent 60%);
  pointer-events: none;
}

.card__sheen {
  position: absolute;
  top: 0;
  left: -60%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    100deg,
    transparent,
    rgba(255, 255, 255, 0.14),
    transparent
  );
  transform: skewX(-18deg);
  pointer-events: none;
}

.card.sheen-run .card__sheen {
  animation: sheen 0.9s ease-out;
}

@keyframes sheen {
  from { left: -60%; }
  to { left: 130%; }
}

.card__top {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand__name {
  font-weight: 900;
  letter-spacing: 0.12em;
  font-size: 15px;
}

.tier {
  position: relative;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tier__label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.tier__name {
  font-size: clamp(22px, 6.4vw, 30px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.05;
  background: linear-gradient(92deg, var(--ink), var(--neon));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.card__chip {
  position: relative;
  margin: 14px 0 16px;
  width: 44px;
  height: 32px;
  border-radius: 7px;
  background: linear-gradient(135deg, #d8c98e, #a9914f);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  padding: 5px;
}

.card__chip span {
  border: 1px solid rgba(0, 0, 0, 0.25);
  border-radius: 2px;
}

.card__chip span:first-child {
  grid-column: 1 / -1;
}

.card__bottom {
  position: relative;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.field__k {
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.field__v {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.field--name .field__v {
  font-size: 19px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  gap: 16px;
}

.field--right {
  text-align: right;
  align-items: flex-end;
}

.mono {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.flip-hint {
  position: absolute;
  right: 18px;
  bottom: 14px;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  opacity: 0.85;
}

.card__front .flip-hint {
  right: auto;
  left: 22px;
  bottom: 8px;
}

/* BACK */
.card__back {
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 18px 24px;
  background: linear-gradient(160deg, #f6f8fa 0%, #e7ebef 100%);
  color: #0d0f12;
}

.back__top {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.back__title {
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #1b1f25;
}

.qr-frame {
  position: relative;
  padding: 12px;
  background: #fff;
  border-radius: var(--r-md);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.qr-frame canvas {
  display: block;
  width: clamp(150px, 42vw, 200px);
  height: clamp(150px, 42vw, 200px);
  image-rendering: pixelated;
}

.qr-corner {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid #0d0f12;
}

.qr-corner--tl { top: 4px; left: 4px; border-right: none; border-bottom: none; }
.qr-corner--tr { top: 4px; right: 4px; border-left: none; border-bottom: none; }
.qr-corner--bl { bottom: 4px; left: 4px; border-right: none; border-top: none; }
.qr-corner--br { bottom: 4px; right: 4px; border-left: none; border-top: none; }

.barcode {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.barcode canvas {
  display: block;
  width: clamp(220px, 70%, 300px);
  height: 52px;
}

.barcode__id {
  font-size: 12px;
  font-weight: 700;
  color: #2a2f36;
}

.card__back .flip-hint {
  color: #4a525c;
  opacity: 1;
}

/* ---------- pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.pill--ok {
  background: rgba(52, 211, 153, 0.16);
  color: var(--ok);
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.pill--ghost {
  background: rgba(13, 15, 18, 0.06);
  color: #3a414a;
  border: 1px solid rgba(13, 15, 18, 0.12);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: live 2s infinite;
}

@keyframes live {
  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5); }
  70% { box-shadow: 0 0 0 7px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

/* ---------- front-desk pulse ---------- */
.card.pulsing {
  animation: deskpulse 1.1s ease-in-out infinite;
}

@keyframes deskpulse {
  0%, 100% {
    box-shadow: var(--shadow-2), 0 0 0 0 rgba(198, 255, 58, 0);
    transform: scale(1);
  }
  50% {
    box-shadow: var(--shadow-2), 0 0 38px 6px rgba(198, 255, 58, 0.45);
    transform: scale(1.012);
  }
}

.card.is-flipped.pulsing {
  animation: deskpulse-back 1.1s ease-in-out infinite;
}

@keyframes deskpulse-back {
  0%, 100% {
    box-shadow: var(--shadow-2), 0 0 0 0 rgba(198, 255, 58, 0);
    transform: rotateY(180deg) scale(1);
  }
  50% {
    box-shadow: var(--shadow-2), 0 0 38px 6px rgba(198, 255, 58, 0.45);
    transform: rotateY(180deg) scale(1.012);
  }
}

/* ---------- controls ---------- */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
  margin-top: 24px;
}

.btn {
  flex: 1 1 auto;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 18px;
  border-radius: var(--r-md);
  font-family: inherit;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(198, 255, 58, 0.4);
}

.btn--neon {
  flex-basis: 100%;
  background: var(--neon);
  color: #10130a;
}

.btn--neon:hover {
  background: var(--neon-d);
}

.btn--ghost {
  background: var(--surface-2);
  color: var(--ink);
  border-color: var(--line-2);
}

.btn--ghost:hover {
  background: var(--elevated);
  border-color: var(--neon);
}

.btn--ghost[aria-pressed="true"] {
  background: var(--neon-50);
  border-color: var(--neon);
  color: var(--neon);
}

.boost-icon {
  font-size: 16px;
  line-height: 1;
}

/* ---------- tier switch ---------- */
.hint-text {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.tier-switch {
  display: inline-flex;
  gap: 6px;
}

.chip {
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: none;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-2);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: all 0.16s ease;
}

.chip:hover {
  border-color: var(--line-2);
  color: var(--ink);
}

.chip[aria-pressed="true"] {
  background: var(--neon-50);
  border-color: var(--neon);
  color: var(--neon);
}

.chip:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(198, 255, 58, 0.35);
}

/* ---------- brightness boost ---------- */
.boost-overlay {
  position: fixed;
  inset: 0;
  background: #fff;
  opacity: 0;
  pointer-events: none;
  z-index: 40;
  transition: opacity 0.3s ease;
}

body.boosted .boost-overlay {
  opacity: 0.96;
}

body.boosted {
  --surface-2: #ffffff;
}

body.boosted .stage {
  position: relative;
  z-index: 60;
}

body.boosted .card__face {
  border-color: rgba(0, 0, 0, 0.4);
}

body.boosted .card__back {
  background: #ffffff;
  filter: contrast(1.25);
}

body.boosted .qr-frame {
  box-shadow: inset 0 0 0 2px #000;
}

/* ---------- toast ---------- */
.toast-host {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  width: max-content;
  max-width: calc(100vw - 32px);
}

.toast {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 16px;
  border-radius: var(--r-md);
  background: var(--elevated);
  color: var(--ink);
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-2);
  font-size: 13.5px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.toast::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon);
}

/* ---------- responsive ---------- */
@media (max-width: 520px) {
  .wrap {
    padding: 22px 16px 48px;
  }

  .controls {
    gap: 8px;
  }

  .btn--ghost {
    flex: 1 1 calc(50% - 4px);
    font-size: 13px;
    padding: 0 10px;
  }

  .flip-hint {
    font-size: 9.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card,
  .card.is-flipped {
    transition: none;
  }
  .dot,
  .card.pulsing,
  .card.is-flipped.pulsing,
  .card.sheen-run .card__sheen {
    animation: none;
  }
}

(function () {
  "use strict";

  /* ---------- member data (fictional) ---------- */
  var member = {
    name: "Marcus Delgado",
    id: "IP-4827-0193",
    joined: "Mar 2022",
  };

  var TIERS = {
    black: { name: "Black Unlimited", id: "IP-4827-0193" },
    pro: { name: "Pro", id: "IP-3391-7740" },
    flex: { name: "Flex", id: "IP-8052-2218" },
  };

  /* ---------- elements ---------- */
  var card = document.getElementById("card");
  var flipBtn = document.getElementById("flipBtn");
  var frontDeskBtn = document.getElementById("frontDeskBtn");
  var boostBtn = document.getElementById("boostBtn");
  var boostLabel = document.getElementById("boostLabel");
  var tierName = document.querySelector(".tier__name");
  var memberIdEl = document.getElementById("memberId");
  var barcodeIdEl = document.querySelector(".barcode__id");
  var toastHost = document.getElementById("toastHost");
  var chips = Array.prototype.slice.call(document.querySelectorAll(".chip[data-tier]"));

  var flipped = false;
  var boosted = false;
  var pulseTimer = null;

  /* ---------- toast ---------- */
  function toast(msg) {
    var el = document.createElement("div");
    el.className = "toast";
    el.textContent = msg;
    toastHost.appendChild(el);
    requestAnimationFrame(function () {
      el.classList.add("show");
    });
    setTimeout(function () {
      el.classList.remove("show");
      setTimeout(function () {
        if (el.parentNode) el.parentNode.removeChild(el);
      }, 280);
    }, 2200);
  }

  /* ---------- deterministic pseudo-random from a seed ---------- */
  function seededRand(seed) {
    var s = 0;
    for (var i = 0; i < seed.length; i++) {
      s = (s * 31 + seed.charCodeAt(i)) >>> 0;
    }
    return function () {
      s = (s * 1664525 + 1013904223) >>> 0;
      return s / 4294967296;
    };
  }

  /* ---------- fake-but-realistic QR matrix ---------- */
  function drawQR(seedStr) {
    var canvas = document.getElementById("qr");
    var ctx = canvas.getContext("2d");
    var N = 25; // modules per side
    var size = canvas.width;
    var cell = Math.floor(size / N);
    var pad = Math.floor((size - cell * N) / 2);
    var rand = seededRand(seedStr);

    ctx.fillStyle = "#ffffff";
    ctx.fillRect(0, 0, size, size);
    ctx.fillStyle = "#0d0f12";

    // build matrix
    var grid = [];
    var r, c;
    for (r = 0; r < N; r++) {
      grid[r] = [];
      for (c = 0; c < N; c++) {
        grid[r][c] = rand() > 0.5 ? 1 : 0;
      }
    }

    // finder pattern (7x7) drawn at a corner
    function finder(or_, oc) {
      for (var i = -1; i <= 7; i++) {
        for (var j = -1; j <= 7; j++) {
          var rr = or_ + i;
          var cc = oc + j;
          if (rr < 0 || cc < 0 || rr >= N || cc >= N) continue;
          var ring = i >= 0 && i <= 6 && j >= 0 && j <= 6;
          var border = i === 0 || i === 6 || j === 0 || j === 6;
          var core = i >= 2 && i <= 4 && j >= 2 && j <= 4;
          grid[rr][cc] = ring && (border || core) ? 1 : 0;
        }
      }
    }
    finder(0, 0);
    finder(0, N - 7);
    finder(N - 7, 0);

    // timing patterns
    for (var k = 8; k < N - 8; k++) {
      grid[6][k] = k % 2 === 0 ? 1 : 0;
      grid[k][6] = k % 2 === 0 ? 1 : 0;
    }

    // render
    for (r = 0; r < N; r++) {
      for (c = 0; c < N; c++) {
        if (grid[r][c]) {
          ctx.fillRect(pad + c * cell, pad + r * cell, cell, cell);
        }
      }
    }
  }

  /* ---------- barcode (Code 128-ish look) ---------- */
  function drawBarcode(seedStr) {
    var canvas = document.getElementById("barcode");
    var ctx = canvas.getContext("2d");
    var w = canvas.width;
    var h = canvas.height;
    var rand = seededRand(seedStr + "::bar");

    ctx.fillStyle = "#ffffff";
    ctx.fillRect(0, 0, w, h);
    ctx.fillStyle = "#0d0f12";

    var x = 6;
    while (x < w - 6) {
      var barW = 1 + Math.floor(rand() * 4);
      var draw = rand() > 0.42;
      if (draw) ctx.fillRect(x, 4, barW, h - 8);
      x += barW + (1 + Math.floor(rand() * 2));
    }
  }

  /* ---------- flip ---------- */
  function setFlipped(state) {
    flipped = state;
    card.classList.toggle("is-flipped", flipped);
    card.setAttribute("aria-pressed", String(flipped));
    card.setAttribute(
      "aria-label",
      flipped
        ? "Membership card. Showing back with door check-in QR code. Activate to flip back."
        : "Membership card. Showing front. Activate to flip and reveal check-in QR code."
    );
    if (!flipped) {
      // re-run sheen on the front when returning
      card.classList.remove("sheen-run");
      void card.offsetWidth;
      card.classList.add("sheen-run");
    }
  }

  function toggleFlip() {
    setFlipped(!flipped);
  }

  card.addEventListener("click", toggleFlip);
  flipBtn.addEventListener("click", function () {
    toggleFlip();
  });

  /* ---------- front desk pulse ---------- */
  frontDeskBtn.addEventListener("click", function (e) {
    e.stopPropagation();
    if (!flipped) setFlipped(true);
    card.classList.add("pulsing");
    toast("Showing check-in code at front desk");
    if (pulseTimer) clearTimeout(pulseTimer);
    pulseTimer = setTimeout(function () {
      card.classList.remove("pulsing");
    }, 6000);
  });

  /* ---------- brightness boost ---------- */
  boostBtn.addEventListener("click", function (e) {
    e.stopPropagation();
    boosted = !boosted;
    document.body.classList.toggle("boosted", boosted);
    boostBtn.setAttribute("aria-pressed", String(boosted));
    boostLabel.textContent = boosted ? "Boost on" : "Brightness boost";
    if (boosted && !flipped) setFlipped(true);
    toast(boosted ? "Max brightness for scanning" : "Brightness restored");
  });

  /* ---------- tier switch ---------- */
  function applyTier(key) {
    var t = TIERS[key];
    if (!t) return;
    tierName.textContent = t.name;
    memberIdEl.textContent = t.id;
    barcodeIdEl.textContent = t.id;
    member.id = t.id;
    chips.forEach(function (chip) {
      chip.setAttribute("aria-pressed", String(chip.getAttribute("data-tier") === key));
    });
    renderCodes();
    toast("Tier set to " + t.name);
  }

  chips.forEach(function (chip) {
    chip.addEventListener("click", function () {
      applyTier(chip.getAttribute("data-tier"));
    });
  });

  /* ---------- render codes from current member ---------- */
  function renderCodes() {
    var payload = "IRONPULSE|" + member.id + "|CHECKIN";
    drawQR(payload);
    drawBarcode(member.id);
  }

  /* ---------- init ---------- */
  chips.forEach(function (chip) {
    chip.setAttribute("aria-pressed", String(chip.getAttribute("data-tier") === "black"));
  });
  renderCodes();

  // entrance sheen
  setTimeout(function () {
    card.classList.add("sheen-run");
  }, 300);
})();

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
  <title>IRONPULSE — Digital Membership Card</title>
  <link rel="preconnect" href="https://fonts.googleapis.com" />
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap" rel="stylesheet" />
  <link rel="stylesheet" href="style.css" />
</head>
<body>
  <main class="wrap" id="app">
    <header class="topbar">
      <div class="brandmark" aria-hidden="true">
        <span class="bolt"></span>
        <span class="brandmark__txt">IRONPULSE</span>
      </div>
      <p class="eyebrow">Member Wallet</p>
    </header>

    <section class="stage" aria-label="Digital membership card">
      <div class="card-scene">
        <button
          type="button"
          class="card"
          id="card"
          aria-pressed="false"
          aria-label="Membership card. Showing front. Activate to flip and reveal check-in QR code."
        >
          <!-- FRONT -->
          <div class="card__face card__front">
            <div class="card__sheen" aria-hidden="true"></div>
            <div class="card__top">
              <div class="brand">
                <span class="brand__bolt" aria-hidden="true"></span>
                <span class="brand__name">IRONPULSE</span>
              </div>
              <span class="pill pill--ok" id="statusPill">
                <span class="dot" aria-hidden="true"></span> Active
              </span>
            </div>

            <div class="tier" id="tierBlock">
              <span class="tier__label">Membership</span>
              <span class="tier__name">Black Unlimited</span>
            </div>

            <div class="card__chip" aria-hidden="true">
              <span></span><span></span><span></span>
            </div>

            <div class="card__bottom">
              <div class="field field--name">
                <span class="field__k">Member</span>
                <span class="field__v" id="memberName">Marcus Delgado</span>
              </div>
              <div class="meta-row">
                <div class="field">
                  <span class="field__k">Member ID</span>
                  <span class="field__v mono" id="memberId">IP-4827-0193</span>
                </div>
                <div class="field field--right">
                  <span class="field__k">Joined</span>
                  <span class="field__v" id="joinDate">Mar 2022</span>
                </div>
              </div>
            </div>

            <span class="flip-hint" aria-hidden="true">Tap to check in →</span>
          </div>

          <!-- BACK -->
          <div class="card__face card__back" id="cardBack">
            <div class="back__top">
              <span class="back__title">Door Check-In</span>
              <span class="pill pill--ghost">Scan at gate</span>
            </div>

            <div class="qr-frame" id="qrFrame">
              <canvas id="qr" width="220" height="220" aria-hidden="true"></canvas>
              <span class="qr-corner qr-corner--tl" aria-hidden="true"></span>
              <span class="qr-corner qr-corner--tr" aria-hidden="true"></span>
              <span class="qr-corner qr-corner--bl" aria-hidden="true"></span>
              <span class="qr-corner qr-corner--br" aria-hidden="true"></span>
            </div>

            <div class="barcode" aria-hidden="true">
              <canvas id="barcode" width="320" height="56"></canvas>
              <span class="barcode__id mono">IP-4827-0193</span>
            </div>

            <span class="flip-hint" aria-hidden="true">← Tap to flip back</span>
          </div>
        </button>
      </div>

      <div class="controls" role="group" aria-label="Card actions">
        <button type="button" class="btn btn--neon" id="frontDeskBtn">
          Show at front desk
        </button>
        <button type="button" class="btn btn--ghost" id="boostBtn" aria-pressed="false">
          <span class="boost-icon" aria-hidden="true">☼</span>
          <span id="boostLabel">Brightness boost</span>
        </button>
        <button type="button" class="btn btn--ghost" id="flipBtn">
          Flip card
        </button>
      </div>

      <p class="hint-text">
        Tier
        <span class="tier-switch" role="group" aria-label="Switch membership tier">
          <button type="button" class="chip" data-tier="black">Black Unlimited</button>
          <button type="button" class="chip" data-tier="pro">Pro</button>
          <button type="button" class="chip" data-tier="flex">Flex</button>
        </span>
      </p>
    </section>
  </main>

  <div class="boost-overlay" id="boostOverlay" hidden></div>
  <div class="toast-host" id="toastHost" aria-live="polite" aria-atomic="true"></div>

  <script src="script.js"></script>
</body>
</html>