/* ============================================================
   QR — Allan Dias Tecnologia
   Premium dark technical theme aligned with main site
   CSP-safe · no inline styles/scripts · responsive
   ============================================================ */

:root {
  --bg:        #07090c;
  --bg-2:      #0a0d12;
  --green:     oklch(0.74 0.17 155);
  --green-soft:oklch(0.74 0.17 155 / 0.16);
  --blue:      oklch(0.66 0.16 240);
  --blue-soft: oklch(0.66 0.16 240 / 0.16);
  --fg:        #e9eef2;
  --fg-soft:   rgba(233,238,242,0.72);
  --fg-mute:   rgba(233,238,242,0.58);
  --fg-faint:  rgba(233,238,242,0.30);
  --border:    rgba(255,255,255,0.08);
  --border-2:  rgba(255,255,255,0.14);
  --panel:     rgba(255,255,255,0.04);
  --panel-2:   rgba(255,255,255,0.06);
  --display:   "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:      "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius:    14px;
  --radius-lg: 20px;
  --ease-premium: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --max-col:   460px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--display);
  background: var(--bg);
  color: var(--fg);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex; flex-direction: column; align-items: center;
  min-height: 100dvh;
  padding: 56px 24px 56px;
  position: relative;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
a, button { -webkit-tap-highlight-color: transparent; }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---------- Background atmosphere ---------- */
.bg-atmos {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background:
    radial-gradient(900px 560px at 14% -8%,  oklch(0.74 0.17 155 / 0.13), transparent 62%),
    radial-gradient(820px 540px at 92% 6%,   oklch(0.66 0.16 240 / 0.12), transparent 62%),
    radial-gradient(1200px 700px at 50% 105%, oklch(0.66 0.16 240 / 0.08), transparent 60%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.038) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.038) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: -1px -1px;
  -webkit-mask-image: radial-gradient(ellipse 90% 75% at 50% 32%, #000 38%, transparent 100%);
          mask-image: radial-gradient(ellipse 90% 75% at 50% 32%, #000 38%, transparent 100%);
}
/* Subtle noise + corner vignette */
.bg-vignette {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, transparent 60%, rgba(0,0,0,0.45) 100%),
    radial-gradient(ellipse 120% 80% at 50% 100%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

/* ---------- Header ---------- */
.page-header {
  width: 100%; max-width: 580px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  margin-bottom: 36px; text-align: center;
  position: relative;
}
.page-header::before {
  content: "";
  position: absolute;
  left: 50%; top: 28px;
  width: 520px; height: 220px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, oklch(0.74 0.17 155 / 0.18), transparent 70%),
    radial-gradient(closest-side, oklch(0.66 0.16 240 / 0.12) 30%, transparent 70%);
  filter: blur(28px);
  z-index: -1;
  opacity: 0.85;
  pointer-events: none;
}

.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px;
  color: var(--fg-mute); text-decoration: none;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(10,13,18,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color 200ms ease, border-color 200ms ease, background 200ms ease, transform 200ms var(--ease-premium);
}
.back-link:hover {
  color: var(--fg);
  border-color: var(--border-2);
  background: rgba(255,255,255,0.04);
  transform: translateY(-1px);
}
.back-link svg { transition: transform 220ms var(--ease-premium); }
.back-link:hover svg { transform: translateX(-2px); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10.5px;
  color: var(--fg-mute); letter-spacing: 0.16em; text-transform: uppercase;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green), 0 0 22px oklch(0.74 0.17 155 / 0.6);
  animation: pulse-dot 2.6s var(--ease-soft) infinite;
}
.eyebrow .bar { width: 18px; height: 1px; background: var(--border-2); }
@keyframes pulse-dot {
  0%, 100% { opacity: 0.95; transform: scale(1); }
  50%      { opacity: 0.55; transform: scale(0.85); }
}

.eyebrow-badge {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(10,13,18,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 10px;
}

.page-header h1 {
  font-size: clamp(30px, 5.6vw, 44px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  text-wrap: balance;
  margin-top: 4px;
}
.page-header h1 em {
  font-style: normal;
  background: linear-gradient(180deg, oklch(0.86 0.14 155), oklch(0.66 0.17 155));
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}
.page-header p {
  font-size: 15px;
  color: var(--fg-soft);
  max-width: 420px;
  line-height: 1.6;
  text-wrap: pretty;
  margin-top: 2px;
}

/* ---------- Tabs ---------- */
.tabs {
  display: inline-flex; gap: 4px;
  background: rgba(10,13,18,0.7);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  padding: 5px;
  margin-bottom: 26px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    0 12px 36px -22px rgba(0,0,0,0.85),
    0 1px 0 rgba(255,255,255,0.04) inset;
  position: relative;
}
.tab {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--fg-mute);
  cursor: pointer;
  transition: color 200ms ease, background 220ms var(--ease-soft), box-shadow 220ms ease;
  position: relative;
}
.tab:hover { color: var(--fg-soft); }
.tab.active {
  color: var(--fg);
  background: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.04));
  box-shadow:
    0 1px 0 rgba(255,255,255,0.10) inset,
    0 0 0 1px rgba(255,255,255,0.06) inset,
    0 8px 22px -14px oklch(0.74 0.17 155 / 0.55);
}

.tab-ico {
  width: 11px; height: 11px; border-radius: 3px;
  display: inline-block;
  border: 1px solid var(--border-2);
  position: relative;
  flex: 0 0 11px;
}
.tab-ico-dark  {
  background: #07090c;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset;
}
.tab-ico-light {
  background: #f0f3f6;
  border-color: rgba(0,0,0,0.18);
}
.tab.active .tab-ico-dark  { box-shadow: 0 0 0 1px var(--border-2) inset, 0 0 8px oklch(0.74 0.17 155 / 0.6); }

/* ---------- QR Card ---------- */
.qr-card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.018)),
    rgba(10,13,18,0.7);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: var(--max-col);
  display: flex; flex-direction: column;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow:
    0 42px 110px -52px rgba(0,0,0,0.95),
    0 28px 70px -54px oklch(0.74 0.17 155 / 0.4),
    0 1px 0 rgba(255,255,255,0.06) inset;
  overflow: hidden;
  isolation: isolate;
}
/* Gradient border highlight */
.qr-card::before {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg,
    oklch(0.74 0.17 155 / 0.55),
    transparent 35%,
    transparent 65%,
    oklch(0.66 0.16 240 / 0.45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
}
/* Soft external glow */
.qr-card::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -32px;
  width: 70%; height: 60px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, oklch(0.74 0.17 155 / 0.32), transparent 70%);
  filter: blur(18px);
  z-index: -1;
  pointer-events: none;
}

/* Card top bar — terminal-style */
.qr-card-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent 90%);
}
.qr-card-dots { display: flex; gap: 6px; }
.qr-card-dots i {
  width: 9px; height: 9px; border-radius: 50%;
  background: rgba(255,255,255,0.14);
  display: block;
}
.qr-card-dots i:nth-child(1) { background: oklch(0.78 0.16 30 / 0.55); }
.qr-card-dots i:nth-child(2) { background: oklch(0.82 0.16 85 / 0.55); }
.qr-card-dots i:nth-child(3) { background: oklch(0.74 0.17 155 / 0.65); }
.qr-card-host {
  flex: 1;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-mute);
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  min-width: 0;
}
.qr-card-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 9.5px;
  color: var(--fg-soft); letter-spacing: 0.08em;
  padding: 3px 8px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  flex-shrink: 0;
}
.qr-card-pill .pdot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 8px var(--green);
}

/* QR stage */
.qr-stage {
  position: relative;
  padding: 28px 28px 22px;
  display: flex; align-items: center; justify-content: center;
}
.qr-stage .corner {
  position: absolute;
  width: 16px; height: 16px;
  border: 1px solid var(--border-2);
  pointer-events: none;
}
.qr-stage .corner.tl { top: 14px; left: 14px;  border-right: none; border-bottom: none; }
.qr-stage .corner.tr { top: 14px; right: 14px; border-left: none;  border-bottom: none; }
.qr-stage .corner.bl { bottom: 14px; left: 14px;  border-right: none; border-top: none; }
.qr-stage .corner.br { bottom: 14px; right: 14px; border-left: none;  border-top: none; }

.qr-glow {
  position: absolute;
  inset: 18%;
  background:
    radial-gradient(circle at 30% 30%, oklch(0.74 0.17 155 / 0.22), transparent 60%),
    radial-gradient(circle at 70% 70%, oklch(0.66 0.16 240 / 0.18), transparent 60%);
  filter: blur(22px);
  z-index: 0;
  pointer-events: none;
}

.qr-wrap {
  position: relative; z-index: 1;
  width: 100%; aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  background: rgba(7,9,12,0.55);
  border: 1px solid var(--border);
  box-shadow:
    0 24px 60px -28px rgba(0,0,0,0.85),
    0 1px 0 rgba(255,255,255,0.04) inset;
}
.qr-wrap img {
  width: 100%; height: 100%;
  object-fit: contain; display: block;
  border-radius: 8px;
}

/* Light card variant */
.qr-card.light-mode {
  background:
    linear-gradient(180deg, #f6f8fb, #e8ecf1);
  border-color: rgba(0,0,0,0.08);
  box-shadow:
    0 42px 110px -52px rgba(0,0,0,0.55),
    0 0 0 1px rgba(0,0,0,0.04);
}
.qr-card.light-mode::before {
  background: linear-gradient(135deg,
    rgba(0,0,0,0.10),
    transparent 35%,
    transparent 65%,
    rgba(0,0,0,0.06));
}
.qr-card.light-mode::after { display: none; }
.qr-card.light-mode .qr-card-bar { border-bottom-color: rgba(0,0,0,0.06); background: linear-gradient(180deg, rgba(0,0,0,0.02), transparent); }
.qr-card.light-mode .qr-card-dots i { background: rgba(0,0,0,0.18); }
.qr-card.light-mode .qr-card-dots i:nth-child(1) { background: oklch(0.62 0.18 30); }
.qr-card.light-mode .qr-card-dots i:nth-child(2) { background: oklch(0.78 0.16 85); }
.qr-card.light-mode .qr-card-dots i:nth-child(3) { background: oklch(0.62 0.16 155); }
.qr-card.light-mode .qr-card-host { color: rgba(0,0,0,0.55); }
.qr-card.light-mode .qr-card-pill {
  color: rgba(0,0,0,0.65);
  border-color: rgba(0,0,0,0.12);
  background: rgba(0,0,0,0.04);
}
.qr-card.light-mode .qr-card-pill .pdot { background: oklch(0.62 0.16 155); box-shadow: none; }
.qr-card.light-mode .qr-stage .corner { border-color: rgba(0,0,0,0.18); }
.qr-card.light-mode .qr-glow { display: none; }
.qr-card.light-mode .qr-wrap {
  background: #ffffff;
  border-color: rgba(0,0,0,0.08);
  box-shadow:
    0 18px 44px -28px rgba(0,0,0,0.35),
    0 0 0 1px rgba(0,0,0,0.04) inset;
}
.qr-card.light-mode .qr-meta { color: #555; border-top-color: rgba(0,0,0,0.06); }
.qr-card.light-mode .qr-url { color: #1a1d22; }
.qr-card.light-mode .badge {
  background: rgba(0,0,0,0.05);
  border-color: rgba(0,0,0,0.10);
  color: #555;
}

/* Meta below QR */
.qr-meta {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  text-align: center;
  padding: 10px 22px 22px;
  border-top: 1px dashed var(--border);
  margin: 0 6px;
}
.qr-url {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.04em;
  display: inline-flex; align-items: center; gap: 8px;
}
.qr-url::before {
  content: "↗";
  color: var(--fg-mute);
  font-weight: 400;
}
.qr-badges {
  display: flex; gap: 6px; flex-wrap: wrap; justify-content: center;
  margin-top: 2px;
}
.badge {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.08em;
  padding: 4px 9px; border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--fg-mute);
  white-space: nowrap;
}

/* ---------- Actions ---------- */
.qr-actions {
  display: flex; gap: 10px;
  width: 100%; max-width: var(--max-col);
  margin-top: 26px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  flex: 1;
  padding: 14px 20px;
  border-radius: 12px;
  border: 1px solid var(--border-2);
  background: var(--panel);
  color: var(--fg);
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform 240ms var(--ease-premium),
    background 220ms var(--ease-soft),
    border-color 220ms var(--ease-soft),
    box-shadow 260ms var(--ease-soft),
    color 220ms ease;
  min-height: 50px;
}
.btn::before {
  content: "";
  position: absolute; inset: 1px;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.16), transparent 42%);
  opacity: 0;
  transition: opacity 220ms var(--ease-soft);
}
.btn:hover {
  transform: translateY(-2px);
  background: var(--panel-2);
  border-color: rgba(255,255,255,0.22);
  box-shadow: 0 18px 42px -28px rgba(0,0,0,0.85);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(180deg, oklch(0.78 0.17 155), oklch(0.68 0.17 155));
  color: #04140b;
  border-color: transparent;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.22) inset,
    0 14px 32px -16px oklch(0.74 0.17 155 / 0.75);
}
.btn-primary:hover {
  border-color: transparent;
  background: linear-gradient(180deg, oklch(0.82 0.17 155), oklch(0.70 0.17 155));
  box-shadow:
    0 1px 0 rgba(255,255,255,0.28) inset,
    0 22px 46px -16px oklch(0.74 0.17 155 / 0.85);
}
.btn-ghost {
  background: rgba(255,255,255,0.035);
}

/* ---------- Specs (mini dashboard) ---------- */
.specs-wrap {
  width: 100%;
  max-width: var(--max-col);
  margin-top: 36px;
  display: flex; flex-direction: column; gap: 14px;
}
.specs-head {
  display: flex; align-items: center; justify-content: flex-start;
  padding-left: 2px;
}
.specs {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.005)),
    rgba(10,13,18,0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    0 24px 60px -42px rgba(0,0,0,0.85),
    0 1px 0 rgba(255,255,255,0.04) inset;
}
.specs-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--fg-soft);
  border-bottom: 1px solid var(--border);
  transition: background 200ms ease;
}
.specs-row:last-child { border-bottom: none; }
.specs-row:hover { background: rgba(255,255,255,0.02); }
.specs-row .k {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--fg-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.specs-row .v {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  text-align: right;
  min-width: 0;
  overflow-wrap: anywhere;
}
.specs-row .v.green {
  color: oklch(0.82 0.16 155);
  font-weight: 600;
}
.specs-row .v-url {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--fg);
  text-align: right;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

/* ---------- Footer ---------- */
.page-footer {
  margin-top: 44px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--fg-mute);
  letter-spacing: 0.06em;
  text-align: center;
  line-height: 1.7;
}
.page-footer .foot-mark {
  width: 24px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-2), transparent);
  margin-bottom: 8px;
}
.page-footer .foot-sub {
  color: var(--fg-faint);
  font-size: 10px;
}

/* ============================================================
   Responsive
   ============================================================ */

/* Tablet */
@media (max-width: 720px) {
  body { padding: 44px 22px 48px; }
  .page-header { gap: 12px; margin-bottom: 30px; }
  .page-header::before { width: 380px; height: 180px; }
  .page-header h1 { font-size: clamp(28px, 7.4vw, 38px); }
  .page-header p { font-size: 14.5px; }
}

/* Mobile (430px) */
@media (max-width: 480px) {
  body { padding: 36px 18px 42px; }

  .back-link { font-size: 10px; padding: 7px 12px; }

  .page-header h1 { font-size: clamp(28px, 8.6vw, 36px); }
  .page-header p { font-size: 14px; max-width: 360px; }
  .page-header::before { width: 320px; height: 160px; }

  .tabs { padding: 4px; margin-bottom: 22px; }
  .tab { padding: 8px 14px; font-size: 10.5px; }

  .qr-card-bar { padding: 10px 12px; gap: 10px; }
  .qr-card-host { font-size: 10px; }
  .qr-card-pill { font-size: 9px; padding: 3px 7px; }

  .qr-stage { padding: 22px 22px 18px; }
  .qr-stage .corner { width: 13px; height: 13px; top: 12px; left: 12px; }
  .qr-stage .corner.tr { left: auto; right: 12px; }
  .qr-stage .corner.bl { top: auto; bottom: 12px; }
  .qr-stage .corner.br { top: auto; bottom: 12px; left: auto; right: 12px; }

  .qr-meta { padding: 8px 18px 20px; }

  .qr-actions { flex-direction: column; gap: 10px; margin-top: 22px; }
  .btn { min-height: 48px; font-size: 14px; }

  .specs-wrap { margin-top: 30px; gap: 12px; }
  .specs-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 14px;
  }
  .specs-row .v,
  .specs-row .v-url { text-align: left; font-size: 13px; }

  .page-footer { margin-top: 36px; }
}

/* Mobile 375px */
@media (max-width: 380px) {
  body { padding: 32px 16px 40px; }
  .page-header h1 { font-size: 30px; }
  .qr-badges .badge { font-size: 9px; padding: 3px 7px; }
}

/* 1920×1080 @125% DPI → CSS 1536×864 — QR deve caber inteiro na dobra */
@media (min-width: 981px) and (max-height: 920px) {
  :root { --max-col: 370px; }
  body { padding: 32px 24px 44px; }
  .page-header { margin-bottom: 22px; gap: 10px; }
  .page-header h1 { font-size: clamp(26px, 3.2vw, 36px); }
  .page-header p { font-size: 14px; }
  .tabs { margin-bottom: 18px; }
  .qr-stage { padding: 22px 22px 18px; }
  .qr-actions { margin-top: 18px; }
  .specs-wrap { margin-top: 26px; }
  .page-footer { margin-top: 30px; }
}

/* 1366×768 @100% / viewports ≤800px de altura */
@media (min-width: 981px) and (max-height: 800px) {
  :root { --max-col: 320px; }
  body { padding: 28px 24px 40px; }
  .page-header { margin-bottom: 18px; gap: 9px; }
  .page-header h1 { font-size: clamp(24px, 3vw, 32px); }
  .page-header p { font-size: 13.5px; }
  .tabs { margin-bottom: 14px; }
  .qr-stage { padding: 18px 18px 14px; }
  .qr-actions { margin-top: 16px; }
  .specs-wrap { margin-top: 22px; }
  .page-footer { margin-top: 26px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}