/* ==========================================================================
   SFX Remote — Soundboard Styles
   Dark, tactile remote/calculator aesthetic
   ========================================================================== */

:root {
  --bg-deep: #0a0a0c;
  --bg-gradient-mid: #141418;
  --bg-gradient-edge: #1a1a22;

  --device-body: #1c1c22;
  --device-body-light: #2a2a32;
  --device-body-dark: #111116;
  --device-border: #33333d;
  --device-shadow: rgba(0, 0, 0, 0.65);

  --lcd-bg: #0d1a0f;
  --lcd-border: #1a3020;
  --lcd-glow: rgba(80, 220, 120, 0.35);
  --lcd-text: #6dff8a;

  --btn-face: #2e2e38;
  --btn-face-hover: #3a3a46;
  --btn-face-active: #222228;
  --btn-highlight: rgba(255, 255, 255, 0.08);
  --btn-shadow: rgba(0, 0, 0, 0.5);
  --btn-text: #e8e8ec;
  --btn-label: #9898a8;

  --accent: #5b8cff;
  --accent-glow: rgba(91, 140, 255, 0.4);
  --stop-color: #ff5b5b;

  --radius-device: 20px;
  --radius-btn: 12px;
  --radius-display: 10px;

  --font-ui: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --transition-fast: 120ms ease;
  --transition-menu: 220ms cubic-bezier(0.34, 1.2, 0.64, 1);
  --transition-panel: 260ms cubic-bezier(0.34, 1.2, 0.64, 1);

  --z-bg: 0;
  --z-page: 1;
  --z-float: 50;
  --z-panel: 60;
  --z-toast: 70;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  height: 100dvh;
}

body {
  min-height: 100%;
  min-height: 100dvh;
  font-family: var(--font-ui);
  color: var(--btn-text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* --- Full-viewport background layer --- */
.page-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  z-index: var(--z-bg);
  background-color: var(--bg-deep);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  /* Default gradient — overridden by JS */
  background-image: linear-gradient(160deg, #0a0a0c 0%, #141418 45%, #1a1a22 100%);
}

/* Subtle noise/grain overlay (hidden when photo is active) */
.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  pointer-events: none;
  transition: opacity var(--transition-panel);
}

.page-bg.is-photo::after {
  opacity: 0;
}

.page-bg.is-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.18);
  pointer-events: none;
}

/* --- Floating background customizer button (viewport-fixed) --- */
.bg-toggle-btn {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: var(--z-float);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(28, 28, 34, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(232, 232, 236, 0.75);
  cursor: pointer;
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.05) inset,
    0 4px 16px rgba(0, 0, 0, 0.45);
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.bg-toggle-btn:hover {
  color: var(--btn-text);
  background: rgba(42, 42, 50, 0.92);
  border-color: rgba(91, 140, 255, 0.25);
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.06) inset,
    0 4px 20px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(91, 140, 255, 0.12);
}

.bg-toggle-btn:active {
  transform: scale(0.96);
}

.bg-toggle-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.bg-toggle-btn.is-active {
  color: var(--accent);
  border-color: rgba(91, 140, 255, 0.35);
}

.bg-toggle-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* --- Background panel backdrop --- */
.bg-panel-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-panel) - 1);
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity var(--transition-panel);
  pointer-events: none;
}

.bg-panel-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.bg-panel-backdrop[hidden] {
  display: block;
  visibility: hidden;
}

.bg-panel-backdrop.is-open[hidden] {
  visibility: visible;
}

/* --- Background customizer panel --- */
.bg-panel {
  position: fixed;
  top: 68px;
  right: 16px;
  z-index: var(--z-panel);
  width: min(320px, calc(100vw - 32px));
  max-height: calc(100dvh - 84px);
  overflow-y: auto;
  background: linear-gradient(165deg, #252530 0%, #1a1a22 100%);
  border: 1px solid var(--device-border);
  border-radius: 16px;
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  transform-origin: top right;
  transform: scale(0.94) translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-panel),
    transform var(--transition-panel),
    visibility var(--transition-panel);
  pointer-events: none;
}

.bg-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.bg-panel[hidden] {
  display: block;
}

.bg-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.bg-panel-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.bg-panel-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--btn-label);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.bg-panel-close:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--btn-text);
}

.bg-panel-close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.bg-panel-body {
  padding: 14px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.bg-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--btn-label);
  margin-bottom: 10px;
}

.bg-preset-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.bg-preset-grid--gradients {
  grid-template-columns: repeat(3, 1fr);
}

.bg-preset-swatch {
  aspect-ratio: 1;
  border: 2px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.bg-preset-swatch:hover {
  transform: scale(1.08);
}

.bg-preset-swatch:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.bg-preset-swatch.is-selected {
  border-color: var(--accent);
  box-shadow:
    0 0 0 1px var(--accent),
    0 2px 8px var(--accent-glow);
}

.bg-color-picker-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.bg-color-picker {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 2px solid var(--device-border);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.bg-color-picker::-webkit-color-swatch-wrapper {
  padding: 3px;
}

.bg-color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 6px;
}

.bg-color-picker-label {
  font-size: 0.85rem;
  color: var(--btn-label);
}

.bg-action-btn {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--device-border);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--btn-face) 0%, var(--btn-face-active) 100%);
  color: var(--btn-text);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow:
    0 2px 0 var(--btn-highlight) inset,
    0 3px 8px var(--btn-shadow);
  transition:
    transform var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast);
}

.bg-action-btn:hover {
  background: linear-gradient(180deg, var(--btn-face-hover) 0%, var(--btn-face) 100%);
}

.bg-action-btn:active {
  transform: translateY(1px);
}

.bg-action-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.bg-action-btn--primary {
  border-color: rgba(91, 140, 255, 0.35);
  background: linear-gradient(180deg, rgba(91, 140, 255, 0.18) 0%, rgba(91, 140, 255, 0.08) 100%);
}

.bg-action-btn--primary:hover {
  border-color: rgba(91, 140, 255, 0.5);
  background: linear-gradient(180deg, rgba(91, 140, 255, 0.28) 0%, rgba(91, 140, 255, 0.12) 100%);
}

.bg-action-btn--reset {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--btn-label);
}

.bg-hint {
  margin-top: 8px;
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--btn-label);
  opacity: 0.85;
}

/* --- Toast notification --- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  z-index: var(--z-toast);
  transform: translateX(-50%) translateY(12px);
  max-width: min(360px, calc(100vw - 32px));
  padding: 12px 18px;
  border-radius: 10px;
  background: rgba(28, 28, 34, 0.94);
  border: 1px solid var(--device-border);
  color: var(--btn-text);
  font-size: 0.85rem;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 280ms ease,
    transform 280ms ease,
    visibility 280ms ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast[hidden] {
  display: block;
}

/* --- Page layout --- */
.page {
  position: relative;
  z-index: var(--z-page);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

/* --- Device body --- */
.device {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: linear-gradient(145deg, var(--device-body-light) 0%, var(--device-body) 40%, var(--device-body-dark) 100%);
  border: 1px solid var(--device-border);
  border-radius: var(--radius-device);
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.04) inset,
    0 -2px 0 rgba(0, 0, 0, 0.3) inset,
    0 24px 48px var(--device-shadow),
    0 8px 16px rgba(0, 0, 0, 0.4);
  padding: 20px 18px 18px;
}

.device-header {
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  margin-bottom: 16px;
}

.device-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 0;
}

.share-wrapper,
.menu-wrapper {
  position: relative;
}

.share-wrapper {
  justify-self: start;
}

.menu-wrapper {
  justify-self: end;
}

/* Shared header icon button (share + hamburger) */
.header-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--device-border);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--btn-face) 0%, var(--btn-face-active) 100%);
  color: var(--btn-label);
  cursor: pointer;
  box-shadow:
    0 2px 0 var(--btn-highlight) inset,
    0 3px 8px var(--btn-shadow);
  transition:
    transform var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.header-icon-btn:hover {
  background: linear-gradient(180deg, var(--btn-face-hover) 0%, var(--btn-face) 100%);
  color: var(--btn-text);
  border-color: rgba(91, 140, 255, 0.2);
}

.header-icon-btn:active,
.header-icon-btn.is-active {
  transform: translateY(2px);
  box-shadow:
    0 1px 0 var(--btn-highlight) inset,
    0 1px 4px var(--btn-shadow);
}

.header-icon-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.share-icon {
  width: 22px;
  height: 22px;
  color: inherit;
}

.menu-toggle {
  font-size: 1.15rem;
  color: var(--btn-text);
}

.menu-icon {
  line-height: 1;
}

/* --- Share dropdown --- */
.share-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 280px;
  max-width: min(320px, calc(100vw - 48px));
  background: linear-gradient(160deg, #252530 0%, #1a1a22 100%);
  border: 1px solid var(--device-border);
  border-radius: 12px;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  overflow: hidden;
  transform-origin: top left;
  transition:
    opacity var(--transition-menu),
    transform var(--transition-menu),
    visibility var(--transition-menu);
  z-index: 100;
}

.share-dropdown[hidden] {
  display: block;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.92) translateY(-6px);
  pointer-events: none;
}

.share-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.share-list {
  list-style: none;
  padding: 6px;
}

.share-list li + li {
  margin-top: 4px;
}

.share-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--btn-text);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.share-row:hover {
  background: rgba(91, 140, 255, 0.1);
  border-color: rgba(91, 140, 255, 0.22);
}

.share-row:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.share-row:active {
  transform: scale(0.98);
}

.share-icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: #fff;
}

.share-icon-badge svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.share-icon-badge--facebook {
  background: #1877f2;
}

.share-icon-badge--linkedin {
  background: #0a66c2;
}

.share-icon-badge--twitter {
  background: #000;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.share-icon-badge--whatsapp {
  background: #25d366;
}

.share-icon-badge--messenger {
  background: linear-gradient(135deg, #00b2ff 0%, #006aff 50%, #a033ff 100%);
}

.share-icon-badge--email {
  background: #2e2e38;
  border: 1px solid var(--device-border);
}

.share-row-label {
  flex: 1;
  min-width: 0;
  line-height: 1.3;
}

.share-row-arrow {
  flex-shrink: 0;
  font-size: 0.9rem;
  color: var(--btn-label);
  opacity: 0.7;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.share-row:hover .share-row-arrow {
  opacity: 1;
  transform: translate(1px, -1px);
}

.brand-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lcd-text);
  box-shadow: 0 0 8px var(--lcd-glow);
  animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.brand-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--btn-label);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: linear-gradient(160deg, #252530 0%, #1a1a22 100%);
  border: 1px solid var(--device-border);
  border-radius: 12px;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  overflow: hidden;
  transform-origin: top right;
  transition:
    opacity var(--transition-menu),
    transform var(--transition-menu),
    visibility var(--transition-menu);
  z-index: 100;
}

.dropdown-menu[hidden] {
  display: block;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.92) translateY(-6px);
  pointer-events: none;
}

.dropdown-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}

.menu-list {
  list-style: none;
  padding: 6px;
}

.menu-list li + li {
  margin-top: 2px;
}

.menu-list a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--btn-text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.menu-list a:hover {
  background: rgba(91, 140, 255, 0.12);
  color: var(--accent);
}

.menu-list a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.display-panel {
  margin-bottom: 18px;
}

.display-bezel {
  padding: 10px;
  background: linear-gradient(180deg, #0e0e12 0%, #181820 100%);
  border-radius: calc(var(--radius-display) + 4px);
  border: 1px solid #2a2a34;
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.03) inset,
    0 -3px 6px rgba(0, 0, 0, 0.4) inset;
}

.display-screen {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 110px;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(80, 220, 120, 0.04) 0%, transparent 50%),
    var(--lcd-bg);
  border: 1px solid var(--lcd-border);
  border-radius: var(--radius-display);
  box-shadow:
    0 0 20px rgba(80, 220, 120, 0.06) inset,
    0 0 40px rgba(0, 0, 0, 0.5) inset;
  overflow: hidden;
}

.display-screen::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
  pointer-events: none;
}

.display-emoji {
  font-size: 3.5rem;
  line-height: 1;
  filter: drop-shadow(0 0 12px var(--lcd-glow));
  transition: filter 700ms ease;
  user-select: none;
}

.display-label {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lcd-text);
  opacity: 0.75;
}

.display-screen.is-animating .display-emoji {
  animation: emoji-bounce 700ms cubic-bezier(0.34, 1.56, 0.64, 1);
  filter: drop-shadow(0 0 24px var(--lcd-glow)) drop-shadow(0 0 40px rgba(80, 220, 120, 0.5));
}

@keyframes emoji-bounce {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.35); }
  55%  { transform: scale(0.92); }
  75%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

@media (min-width: 380px) {
  .keypad {
    grid-template-columns: repeat(4, 1fr);
    gap: 9px;
  }
}

.sound-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 72px;
  padding: 10px 6px 8px;
  border: none;
  border-radius: var(--radius-btn);
  background: linear-gradient(180deg, var(--btn-face) 0%, var(--btn-face-active) 100%);
  color: var(--btn-text);
  cursor: pointer;
  box-shadow:
    0 2px 0 var(--btn-highlight) inset,
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 4px 0 #141418,
    0 6px 12px var(--btn-shadow);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.sound-btn:hover {
  background: linear-gradient(180deg, var(--btn-face-hover) 0%, var(--btn-face) 100%);
}

.sound-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sound-btn:active,
.sound-btn.is-pressed {
  transform: translateY(4px);
  box-shadow:
    0 1px 0 var(--btn-highlight) inset,
    0 2px 0 #141418,
    0 3px 6px var(--btn-shadow);
}

.sound-btn-emoji {
  font-size: 1.6rem;
  line-height: 1;
  user-select: none;
}

.sound-btn-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--btn-label);
  text-align: center;
  line-height: 1.2;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.utility-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.utility-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 14px;
  border: 1px solid var(--device-border);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--btn-face) 0%, var(--btn-face-active) 100%);
  color: var(--btn-text);
  cursor: pointer;
  box-shadow:
    0 2px 0 var(--btn-highlight) inset,
    0 3px 8px var(--btn-shadow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.utility-btn:hover {
  background: linear-gradient(180deg, var(--btn-face-hover) 0%, var(--btn-face) 100%);
}

.utility-btn:active {
  transform: translateY(2px);
  box-shadow:
    0 1px 0 var(--btn-highlight) inset,
    0 1px 4px var(--btn-shadow);
}

.utility-btn--stop:hover {
  border-color: rgba(255, 91, 91, 0.4);
  color: var(--stop-color);
}

.utility-btn.is-muted .utility-icon {
  opacity: 0.45;
}

.utility-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.utility-label {
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--btn-label);
}

.volume-slider-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0 4px;
}

.volume-slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--device-body-dark);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent) 0%, #3a6fd4 100%);
  box-shadow: 0 2px 6px var(--accent-glow);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.volume-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent) 0%, #3a6fd4 100%);
  box-shadow: 0 2px 6px var(--accent-glow);
  cursor: pointer;
}

@media (max-width: 480px) {
  .page {
    padding: 56px 10px 12px;
    align-items: stretch;
  }

  .bg-toggle-btn {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
  }

  .bg-panel {
    top: 60px;
    right: 12px;
    left: 12px;
    width: auto;
  }

  .device {
    max-width: none;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 16px 14px 14px;
  }

  .keypad {
    flex: 1;
    align-content: start;
  }

  .sound-btn {
    min-height: 68px;
  }

  .display-emoji {
    font-size: 3rem;
  }
}

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

/* --- Desktop-only social links --- */
.social-links {
  display: none;
}

@media (min-width: 768px) {
  .social-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    padding: 28px 20px 40px;
    position: relative;
    z-index: var(--z-page);
  }

  .social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(28, 28, 34, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(232, 232, 236, 0.7);
    transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  }

  .social-links a:hover {
    color: #fff;
    background: rgba(42, 42, 50, 0.95);
    border-color: rgba(91, 140, 255, 0.35);
    transform: translateY(-2px);
  }

  .social-links svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
  }
}