/* extras.css – nav, theme toggle, sticky CTA, easter egg */

/* ===== TopNav ===== */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all 0.25s ease;
  border-bottom: 1px solid transparent;
}
.topnav.is-scrolled {
  background: rgba(10, 10, 11, 0.85);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}
html[data-theme="light"] .topnav.is-scrolled {
  background: rgba(244, 244, 240, 0.85);
}
.topnav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.topnav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.topnav__brand-mark {
  color: var(--accent);
  font-size: 14px;
  white-space: nowrap;
  flex: 0 0 auto;
}
.topnav__brand-name { font-size: 14px; }

.topnav__links {
  display: flex;
  gap: 28px;
  font-size: 13px;
  color: var(--fg-2);
}
.topnav__links a {
  position: relative;
  padding: 4px 0;
  transition: color 0.15s;
}
.topnav__links a:hover { color: var(--fg); }
.topnav__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.2s ease;
}
.topnav__links a:hover::after { right: 0; }

.topnav__cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topnav__cta-btn {
  padding: 8px 16px;
  font-size: 13px;
}

.topnav__burger {
  display: none;
  width: 28px;
  height: 28px;
  background: transparent;
  border: 0;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.topnav__burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--fg);
  transition: all 0.2s;
}
.topnav__burger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.topnav__burger.is-open span:nth-child(2) { opacity: 0; }
.topnav__burger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.topnav__mobile {
  background: var(--bg);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 16px var(--pad-x);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.topnav__mobile[hidden] { display: none; }
.topnav__mobile a {
  padding: 12px 0;
  font-size: 16px;
  border-bottom: 1px solid var(--line);
}
.topnav__mobile a.btn { margin-top: 12px; border-bottom: 1px solid var(--accent); justify-content: center; }

@media (max-width: 880px) {
  .topnav__links { display: none; }
  .topnav__cta .topnav__cta-btn { display: none; }
  .topnav__cta { gap: 8px; }
  .topnav__burger { display: flex; }
}

/* ===== Sticky CTA bottom (mobile) ===== */
.sticky-cta {
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  z-index: 50;
  display: none;
}
.sticky-cta .btn {
  width: 100%;
  justify-content: center;
  padding: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
@media (max-width: 720px) {
  .sticky-cta { display: block; }
  .sticky-cta.is-hidden { display: none; }
}

/* ===== Theme toggle (sun ↔ moon) ===== */
.theme-toggle {
  position: relative;
  z-index: 1;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, background 0.4s;
  -webkit-tap-highlight-color: transparent;
}
.theme-toggle:hover {
  border-color: var(--fg);
  transform: translateY(-1px);
}
.theme-toggle:active { transform: translateY(0); }

.theme-toggle__sky {
  position: absolute;
  inset: 0;
  display: block;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(180deg, #1a1a1a 0%, #2a2a2a 55%, #3a3a3a 100%);
  transition: background 0.7s ease;
}
.theme-toggle.is-light .theme-toggle__sky {
  background: linear-gradient(180deg, #e8e8e6 0%, #d4d4d0 55%, #b8b8b4 100%);
}

.theme-toggle__horizon {
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: 32%;
  height: 1px;
  background: rgba(255,255,255,0.22);
  z-index: 2;
}
.theme-toggle.is-light .theme-toggle__horizon {
  background: rgba(0,0,0,0.22);
}

.theme-toggle__sun,
.theme-toggle__moon {
  position: absolute;
  width: 60%;
  height: 60%;
  left: 20%;
  top: 12%;
  transition:
    transform 0.75s cubic-bezier(.5,.05,.3,1),
    opacity 0.55s ease;
  will-change: transform, opacity;
}

.theme-toggle.is-light .theme-toggle__sun {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.theme-toggle.is-dark .theme-toggle__sun {
  transform: translateY(140%) scale(0.85);
  opacity: 0;
}

.theme-toggle.is-dark .theme-toggle__moon {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.theme-toggle.is-light .theme-toggle__moon {
  transform: translateY(140%) scale(0.85);
  opacity: 0;
}

.theme-toggle__sun-disc { fill: #f4f4f0; }
.theme-toggle.is-light .theme-toggle__sun-disc { fill: #ffffff; filter: none; }
.theme-toggle__rays line {
  stroke: #ffffff;
  stroke-width: 1.6;
  stroke-linecap: round;
  transform-origin: 0 0;
  transition: opacity 0.4s ease, stroke 0.4s ease;
}
.theme-toggle.is-dark .theme-toggle__rays { opacity: 0; }

.theme-toggle__moon-disc { fill: #f4f4f0; }
.theme-toggle__star {
  fill: #f4f4f0;
  opacity: 0.85;
  transition: opacity 0.5s ease;
}
.theme-toggle.is-light .theme-toggle__star { opacity: 0; }

@media (max-width: 720px) {
  .theme-toggle { width: 36px; height: 36px; }
}

/* ===== Easter egg trigger (top nav, obok motywu) ===== */
.egg-trigger {
  position: relative;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent;
}
.egg-trigger:hover {
  border-color: var(--fg);
  transform: translateY(-1px);
}
.egg-trigger:active { transform: translateY(0); }
.egg-trigger__icon {
  display: block;
  width: 28px;
  height: auto;
  pointer-events: none;
  filter: grayscale(0.25);
  transition: filter 0.2s, transform 0.2s;
}
.egg-trigger:hover .egg-trigger__icon {
  filter: grayscale(0);
  transform: rotate(-12deg);
}
@media (max-width: 720px) {
  .egg-trigger { width: 36px; height: 36px; }
  .egg-trigger__icon { width: 26px; }
}

/* ===== Language toggle (top nav, PL | EN) ===== */
.lang-toggle {
  position: relative;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 19px;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  padding: 0 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fg-3);
  transition: border-color 0.2s, transform 0.2s, color 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent;
}
.lang-toggle:hover {
  border-color: var(--fg);
  transform: translateY(-1px);
}
.lang-toggle:active { transform: translateY(0); }
.lang-toggle__pl,
.lang-toggle__en {
  transition: color 0.2s;
}
.lang-toggle__pl.is-active,
.lang-toggle__en.is-active {
  color: var(--accent);
}
.lang-toggle__sep {
  color: var(--line-2);
  user-select: none;
}
@media (max-width: 720px) {
  .lang-toggle { height: 36px; font-size: 11px; padding: 0 10px; }
}

/* ===== Code trigger (top nav, opens node graph) ===== */
.code-trigger {
  position: relative;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  letter-spacing: -0.04em;
  color: var(--fg-2);
  transition: border-color 0.2s, transform 0.2s, color 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent;
}
.code-trigger:hover {
  border-color: var(--fg);
  color: var(--accent);
  transform: translateY(-1px);
}
.code-trigger:active { transform: translateY(0); }
@media (max-width: 720px) {
  .code-trigger { width: 36px; height: 36px; font-size: 11px; }
}

/* ===== Node graph overlay ===== */
.ng-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeUp 0.2s ease;
}
.ng-frame {
  position: relative;
  width: 100%;
  max-width: 1140px;
  height: 90vh;
  max-height: 740px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}
.ng-frame__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
}
.ng-frame__title {
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
}
.ng-frame__close {
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-2);
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
}
.ng-frame__close:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.ng-canvas {
  flex: 1;
  position: relative;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}
.ng-edges {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}
.ng-edges path { pointer-events: stroke; }
.ng-node {
  position: absolute;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  border-radius: 6px;
  font-size: 12px;
  user-select: none;
  cursor: grab;
  touch-action: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.ng-node:hover { border-color: var(--accent); }
.ng-node.is-dragging {
  cursor: grabbing;
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(244, 244, 240, 0.18);
  z-index: 10;
}
.ng-node.is-err { border-color: #b04a4a; }
.ng-node--terminal {
  border-color: var(--accent);
  background: rgba(244, 244, 240, 0.04);
}
.ng-node--terminal.is-lit {
  box-shadow: 0 0 0 1px var(--accent), 0 8px 32px rgba(244, 244, 240, 0.25);
  animation: ng-pulse 1.6s ease-in-out infinite;
}
@keyframes ng-pulse {
  0%, 100% { box-shadow: 0 0 0 1px var(--accent), 0 8px 32px rgba(244, 244, 240, 0.25); }
  50%      { box-shadow: 0 0 0 1px var(--accent), 0 8px 48px rgba(244, 244, 240, 0.4); }
}
.ng-node__head {
  padding: 6px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0.02em;
  height: 28px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
}
.ng-node__rows { padding: 0; }
.ng-node__row {
  position: relative;
  height: 22px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--fg-2);
}
.ng-node__row--in { justify-content: flex-start; }
.ng-node__row--out {
  justify-content: flex-end;
  color: var(--accent);
  border-top: 1px dashed var(--line);
  padding-top: 2px;
  height: 26px;
}
.ng-node__row--terminal {
  justify-content: center;
  font-size: 11px;
  border-top: 1px dashed var(--line);
  padding: 6px 12px;
  height: auto;
  letter-spacing: 0.04em;
}
.ng-node__ok      { color: var(--accent); }
.ng-node__err     { color: #d97070; }
.ng-node__pending { color: var(--fg-3); }
.ng-node__port-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ng-node__row--out .ng-node__port-label { text-align: right; }
.ng-node__port-type {
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  padding: 1px 4px;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.ng-port {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--accent);
  cursor: crosshair;
  z-index: 2;
  touch-action: none;
  transition: transform 0.15s, background 0.15s;
}
.ng-port:hover { transform: scale(1.4); background: var(--accent); }
.ng-port.is-connected { background: var(--accent); }
.ng-port--in  { left: -7px;  top: 50%; transform: translateY(-50%); }
.ng-port--in:hover { transform: translateY(-50%) scale(1.4); background: var(--accent); }
.ng-port--out { right: -7px; top: 50%; transform: translateY(-50%); }
.ng-port--out:hover { transform: translateY(-50%) scale(1.4); background: var(--accent); }
/* Domain ingredients & combiner */
.ng-port[data-type="rhino"]    { border-color: #c8ff3e; }
.ng-port[data-type="code"]     { border-color: #c8ff3e; }
.ng-port[data-type="domain"]   { border-color: #d68bff; }
/* Activity ingredients & combiner */
.ng-port[data-type="collab"]   { border-color: #6ec1ff; }
.ng-port[data-type="network"]  { border-color: #6ec1ff; }
.ng-port[data-type="learn"]    { border-color: #6ec1ff; }
.ng-port[data-type="activity"] { border-color: #ffb86b; }
/* Place ingredients & combiner */
.ng-port[data-type="lat"]      { border-color: #f8d76e; }
.ng-port[data-type="lon"]      { border-color: #f8d76e; }
.ng-port[data-type="place"]    { border-color: #ff5e9c; }
/* Year – editable numbers + sum */
.ng-port[data-type="num"]      { border-color: #c8ff3e; }
.ng-port[data-type="year"]     { border-color: #ff8b8b; }

/* Editable number input inside source nodes */
.ng-node__num-input {
  flex: 1;
  min-width: 0;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  text-align: right;
  border-radius: 0;
  outline: none;
  -moz-appearance: textfield;
  appearance: textfield;
  margin: 0;
}
.ng-node__num-input::-webkit-outer-spin-button,
.ng-node__num-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.ng-node__num-input:focus {
  border-color: var(--accent);
  background: var(--bg-3);
}

.ng-frame__foot {
  padding: 10px 18px;
  border-top: 1px solid var(--line);
  background: var(--bg-3);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.ng-frame__success { color: var(--accent); }
.ng-frame__waiting { color: var(--fg-3); }

.ng-success-card {
  position: absolute;
  left: 50%;
  bottom: 70px;
  transform: translateX(-50%);
  background: var(--bg-2);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 14px 18px;
  display: flex;
  gap: 18px;
  align-items: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
  animation: ng-card-in 0.4s ease-out;
  z-index: 20;
  width: calc(100% - 32px);
  max-width: 480px;
}
.ng-success-card__img {
  display: block;
  width: 110px;
  height: auto;
  flex: 0 0 auto;
}
@keyframes ng-card-in {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}
.ng-success-card__msg {
  font-size: 12px;
  color: var(--fg);
}
.ng-success-card__msg strong { color: var(--accent); display: block; margin-bottom: 4px; letter-spacing: 0.04em; }
.ng-success-card__msg p { margin: 0; color: var(--fg-2); font-size: 11px; line-height: 1.5; }

.ng-confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.ng-confetti__hop {
  position: absolute;
  top: -40px;
  display: inline-block;
  animation: ng-fall linear forwards;
}
@keyframes ng-fall {
  0%   { transform: translateY(0) rotate(0deg);   opacity: 0; }
  10%  { opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0.9; }
}

@media (max-width: 720px) {
  .ng-frame { height: 90vh; }
  .ng-canvas { overflow: auto; }
}

/* ===== Hopper game overlay (chrome-dino style) ===== */
.hg-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeUp 0.2s ease;
}
.hg-frame {
  position: relative;
  width: 100%;
  max-width: 960px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}
.hg-frame__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
}
.hg-frame__title {
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
}
.hg-frame__close {
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-2);
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
}
.hg-frame__close:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hg-stage {
  position: relative;
  background:
    linear-gradient(to bottom, transparent 0%, transparent 82%, var(--line) 82%, var(--line) calc(82% + 1px), transparent calc(82% + 1px)),
    var(--bg-2);
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  border-bottom: 1px solid var(--line);
}
.hg-canvas {
  display: block;
  width: 100%;
  height: auto;
  background: transparent;
  touch-action: manipulation;
  cursor: pointer;
}
.hg-hud {
  position: absolute;
  top: 12px;
  right: 16px;
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--fg-2);
  letter-spacing: 0.08em;
  pointer-events: none;
}
.hg-hud__hi { color: var(--fg-3); }
.hg-start-msg,
.hg-overlay-msg {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  text-align: center;
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
  pointer-events: none;
}
.hg-overlay-msg { bottom: 50%; transform: translateY(50%); }
.hg-overlay-msg__title {
  font-size: 18px;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 500;
}
.hg-overlay-msg__hint { color: var(--fg-3); }
.hg-frame__foot {
  padding: 10px 18px;
  border-top: 1px solid var(--line);
  background: var(--bg-3);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
@media (max-width: 720px) {
  .hg-overlay { padding: 12px; }
}

/* ===== Win card (score 500 in hopper game) ===== */
.hg-win {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(10, 10, 11, 0.55);
  z-index: 1200;
}
html[data-theme="light"] .hg-win {
  background: rgba(244, 244, 240, 0.55);
}
.hg-win__card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 14px 18px;
  display: flex;
  gap: 18px;
  align-items: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  width: 100%;
  max-width: 480px;
  z-index: 2;
  animation: hg-card-in 0.45s ease-out;
}
@keyframes hg-card-in {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hg-win__hopper {
  display: block;
  width: 110px;
  height: auto;
  flex: 0 0 auto;
}
.hg-win__msg { font-size: 12px; color: var(--fg); }
.hg-win__msg strong { color: var(--accent); display: block; margin-bottom: 4px; letter-spacing: 0.04em; }
.hg-win__msg p { margin: 0; color: var(--fg-2); font-size: 11px; line-height: 1.5; }
.hg-win__close {
  display: inline-block;
  margin-top: 14px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-2);
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  cursor: pointer;
  border-radius: 4px;
  transition: border-color 0.2s, color 0.2s;
}
.hg-win__close:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hg-confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}
.hg-confetti__hop {
  position: absolute;
  top: -40px;
  display: inline-block;
  animation: ng-fall linear forwards;
}
@media (max-width: 720px) {
  .hg-win__card { flex-direction: column; gap: 14px; text-align: center; padding: 20px; max-width: 380px; }
  .hg-win__hopper { width: 110px; }
  .hg-win__close { padding: 10px 18px; font-size: 13px; }
}

/* ===== QR enlarge overlay ===== */
.qr-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 11, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeUp 0.2s ease;
}
html[data-theme="light"] .qr-overlay { background: rgba(244, 244, 240, 0.85); }
.qr-frame {
  position: relative;
  width: 100%;
  max-width: 560px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}
.qr-frame__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
}
.qr-frame__title {
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
}
.qr-frame__close {
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--fg-2);
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
}
.qr-frame__close:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.qr-frame__stage {
  padding: clamp(28px, 5vh, 56px);
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}
html[data-theme="light"] .qr-frame__stage {
  background-image:
    linear-gradient(to right, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
}
.qr-frame__img {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
}
html[data-theme="dark"] .qr-frame__img { filter: invert(1); }
.qr-frame__foot {
  padding: 10px 18px;
  border-top: 1px solid var(--line);
  background: var(--bg-3);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
@media (max-width: 720px) {
  .qr-overlay { padding: 12px; }
}