:root {
  --tool-safe-top: env(safe-area-inset-top, 0px);
  --tool-safe-right: env(safe-area-inset-right, 0px);
  --tool-safe-bottom: env(safe-area-inset-bottom, 0px);
  --tool-safe-left: env(safe-area-inset-left, 0px);
  --tool-app-bar-height: 60px;
  --tool-nav-height: 70px;
  --tool-viewport-height: 100dvh;
}

html.toolkit-app,
body.tool-app {
  max-width: 100%;
  overflow-x: hidden;
}

html.has-tool-dialog,
html.has-tool-dialog body {
  overflow: hidden;
}

.tool-app-bar,
.tool-bottom-nav,
.pwa-view-tabs {
  display: none;
}

.tool-icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
}

.tool-icon-button[hidden],
.pwa-home-install[hidden] {
  display: none !important;
}

.tool-icon-button img,
.tool-bottom-nav img,
.tool-card-icon img,
.tool-list-icon img,
.pwa-recent img,
.pwa-home-install img,
.install-share-mark img {
  filter: invert(1);
}

.tool-card-icon {
  display: grid !important;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--text) !important;
  background: rgba(255, 113, 11, .12);
  border: 1px solid rgba(255, 113, 11, .3);
  border-radius: 7px;
}

.tool-card-icon + span {
  margin-top: 16px;
}

.pwa-home-install {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 8px 15px;
  color: var(--text);
  background: var(--card);
  border: 1px solid rgba(255, 113, 11, .48);
  border-radius: 7px;
  cursor: pointer;
  text-align: left;
}

.toolkit-home .pwa-home-install {
  grid-column: 2;
  justify-self: start;
  width: 250px;
}

.pwa-home-install[hidden] {
  display: none;
}

.pwa-home-install b,
.pwa-home-install small {
  display: block;
}

.pwa-home-install b {
  font-size: .76rem;
}

.pwa-home-install small {
  margin-top: 2px;
  color: var(--muted);
  font-size: .62rem;
}

.pwa-recent {
  margin: 4px 24px 16px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.pwa-section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 13px;
}

.pwa-section-title span {
  color: var(--accent);
  font-size: .6rem;
}

.pwa-section-title strong {
  font-size: .78rem;
}

.pwa-recent > div:last-child {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 240px));
  gap: 8px;
}

.pwa-recent a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 12px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.pwa-recent a > span {
  min-width: 0;
}

.pwa-recent b,
.pwa-recent small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pwa-recent b {
  font-size: .72rem;
}

.pwa-recent small {
  margin-top: 3px;
  color: var(--muted);
  font-size: .58rem;
}

.tool-switcher,
.tool-install-sheet {
  width: min(680px, calc(100% - 28px));
  max-height: min(760px, calc(100dvh - 28px));
  margin: auto;
  padding: 24px;
  overflow: auto;
  color: var(--text);
  background: #181816;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, .68);
}

.tool-switcher::backdrop,
.tool-install-sheet::backdrop {
  background: rgba(5, 5, 4, .78);
  backdrop-filter: blur(7px);
}

.tool-switcher header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.tool-switcher h2,
.tool-install-sheet h2 {
  margin: 6px 0 0;
  font-size: 1.55rem;
  letter-spacing: 0;
}

.tool-sheet-handle {
  display: none;
}

.tool-switcher-groups {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.tool-switcher-groups h3 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: .62rem;
  text-transform: uppercase;
}

.tool-switcher-groups section > div {
  border-top: 1px solid var(--border);
}

.tool-switcher-groups a {
  display: grid;
  grid-template-columns: 38px 1fr 18px;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.tool-switcher-groups a.is-current {
  color: var(--accent-soft);
}

.tool-switcher-groups a > img {
  width: 17px;
  filter: invert(1);
  opacity: .55;
}

.tool-list-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--surface);
  border-radius: 6px;
}

.tool-switcher-groups b {
  font-size: .75rem;
}

.tool-install-sheet {
  position: relative;
  max-width: 390px;
  padding: 30px;
  text-align: center;
}

.tool-install-sheet > .tool-icon-button {
  position: absolute;
  top: 12px;
  right: 12px;
}

.tool-install-icon {
  display: block;
  margin: 4px auto 18px;
  border-radius: 17px;
}

.tool-install-sheet p {
  max-width: 300px;
  margin: 15px auto 20px;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.65;
}

.install-share-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 15px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .7rem;
  font-weight: 800;
}

.pwa-toast {
  position: fixed;
  z-index: 110;
  right: 18px;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: calc(100% - 36px);
  padding: 12px 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  color: var(--text);
  background: #24241f;
  border: 1px solid var(--border);
  border-radius: 7px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, .45);
  transition: opacity .2s ease, transform .2s ease;
  font-size: .7rem;
}

.pwa-toast.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.pwa-toast button {
  min-height: 44px;
  padding: 0 10px;
  color: #17130f;
  background: var(--accent);
  border: 0;
  border-radius: 5px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.pwa-offline-page {
  display: grid;
  place-content: center;
  justify-items: start;
  min-height: 100dvh;
  width: min(620px, calc(100% - 40px));
  margin: auto;
  padding: 70px 0;
}

.pwa-offline-page > img {
  margin-bottom: 24px;
  border-radius: 17px;
}

.pwa-offline-page h1 {
  margin: 10px 0 0;
  font-size: clamp(2.4rem, 10vw, 4.8rem);
  letter-spacing: 0;
}

.pwa-offline-page p {
  max-width: 480px;
  margin: 20px 0 26px;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 760px), (max-width: 960px) and (max-height: 600px) {
  html.toolkit-app {
    background: #10100f;
    overscroll-behavior-y: none;
  }

  body.tool-app {
    min-height: var(--tool-viewport-height);
    padding-bottom: calc(var(--tool-nav-height) + var(--tool-safe-bottom)) !important;
    overscroll-behavior-y: none;
    -webkit-tap-highlight-color: transparent;
  }

  .tool-app button,
  .tool-app a,
  .tool-app input,
  .tool-app select {
    touch-action: manipulation;
  }

  .tool-app button:disabled,
  .tool-app [aria-disabled="true"] {
    opacity: .45;
    pointer-events: none;
  }

  .tool-app button:active,
  .tool-app a:active {
    filter: brightness(.88);
  }

  .tool-app .site-shell > .site-header,
  .tool-app .site-footer,
  .tool-app .mobile-download-bar,
  .tool-app .guide-breadcrumb,
  .tool-app .tool-hero,
  .tool-app .size-tool-intro {
    display: none !important;
  }

  .tool-app-bar {
    position: sticky;
    z-index: 90;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    min-height: calc(var(--tool-app-bar-height) + var(--tool-safe-top));
    padding: var(--tool-safe-top) calc(13px + var(--tool-safe-right)) 0 calc(13px + var(--tool-safe-left));
    background: rgba(18, 18, 16, .96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(18px) saturate(1.2);
  }

  .tool-app-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    min-height: 44px;
    color: var(--text);
  }

  .tool-app-brand > img {
    flex: 0 0 auto;
    border-radius: 8px;
  }

  .tool-app-brand span,
  .tool-app-brand b,
  .tool-app-brand small {
    display: block;
    min-width: 0;
  }

  .tool-app-brand b {
    overflow: hidden;
    font-size: .73rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .tool-app-brand small {
    margin-top: 2px;
    color: var(--muted);
    font-size: .55rem;
  }

  .is-offline .tool-app-brand small {
    color: var(--accent-soft);
  }

  .tool-app-actions {
    display: flex;
    gap: 7px;
  }

  .tool-app-actions .tool-icon-button {
    width: 44px;
    height: 44px;
  }

  .tool-bottom-nav {
    position: fixed;
    z-index: 95;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    min-height: calc(var(--tool-nav-height) + var(--tool-safe-bottom));
    padding: 5px calc(8px + var(--tool-safe-right)) var(--tool-safe-bottom) calc(8px + var(--tool-safe-left));
    background: rgba(20, 20, 18, .98);
    border-top: 1px solid var(--border);
    box-shadow: 0 -12px 32px rgba(0, 0, 0, .28);
    backdrop-filter: blur(18px) saturate(1.2);
    transition: transform .18s ease, opacity .18s ease;
  }

  .tool-bottom-nav a,
  .tool-bottom-nav button {
    display: grid;
    place-content: center;
    justify-items: center;
    gap: 4px;
    min-width: 0;
    min-height: 58px;
    padding: 4px;
    color: var(--muted);
    background: transparent;
    border: 0;
    border-radius: 7px;
    cursor: pointer;
    font: inherit;
  }

  .tool-bottom-nav span {
    font-size: .55rem;
    font-weight: 800;
  }

  .tool-bottom-nav a.is-active,
  .tool-bottom-nav button.is-active {
    color: var(--accent-soft);
    background: rgba(255, 113, 11, .1);
  }

  .tool-bottom-nav .is-active img {
    filter: invert(58%) sepia(98%) saturate(2644%) hue-rotate(350deg) brightness(102%);
  }

  .tool-switcher,
  .tool-install-sheet {
    width: 100%;
    max-width: none;
    max-height: min(84dvh, 760px);
    margin: auto 0 0;
    padding: 12px 17px calc(20px + var(--tool-safe-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 12px 12px 0 0;
  }

  .tool-sheet-handle {
    display: block;
    width: 42px;
    height: 4px;
    margin: 1px auto 12px;
    background: var(--muted-2);
    border-radius: 2px;
  }

  .tool-switcher header {
    margin-bottom: 16px;
  }

  .tool-switcher-groups {
    display: block;
  }

  .tool-switcher-groups section + section {
    margin-top: 22px;
  }

  .tool-switcher-groups a {
    min-height: 60px;
  }

  .tool-install-sheet {
    padding: 12px 24px calc(30px + var(--tool-safe-bottom));
  }

  .tool-install-sheet > .tool-icon-button {
    top: 20px;
    right: 17px;
  }

  .pwa-toast {
    right: 12px;
    bottom: calc(var(--tool-nav-height) + var(--tool-safe-bottom) + 10px);
    left: 12px;
    max-width: none;
  }

  .toolkit-home .growth-hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 13px;
    align-items: end;
    padding: 24px 17px 16px;
  }

  .toolkit-home .growth-hero > div:first-child {
    grid-column: 1 / -1;
  }

  .toolkit-home .growth-hero h1 {
    margin: 7px 0 0;
    font-size: 2.35rem;
    line-height: 1.02;
    letter-spacing: 0;
  }

  .toolkit-home .growth-hero p {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    font-size: .68rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .toolkit-home .pwa-home-install {
    align-self: stretch;
    min-width: 136px;
    width: auto;
  }

  .toolkit-home .tool-grid {
    grid-template-columns: 1fr 1fr;
    gap: 9px;
    padding: 8px 12px 24px;
  }

  .toolkit-home .tool-card {
    min-height: 178px;
    padding: 14px;
    border-radius: 7px;
  }

  .toolkit-home .tool-card-icon {
    width: 38px;
    height: 38px;
  }

  .toolkit-home .tool-card-icon + span {
    margin-top: 13px;
  }

  .toolkit-home .tool-card h2 {
    margin: 9px 0 6px;
    font-size: .86rem;
    line-height: 1.28;
  }

  .toolkit-home .tool-card p {
    display: -webkit-box;
    overflow: hidden;
    font-size: .63rem;
    line-height: 1.45;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .toolkit-home .tool-card strong {
    padding-top: 12px;
    font-size: .6rem;
  }

  .pwa-recent {
    margin: 4px 12px 8px;
    padding: 14px;
    border-radius: 7px;
  }

  .pwa-recent > div:last-child {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .pwa-recent a {
    display: grid;
    justify-items: start;
    gap: 7px;
    padding: 10px;
  }

  .pwa-recent b {
    font-size: .64rem;
  }

  .tool-app:not(.toolkit-home) .growth-hero {
    display: block;
    padding: 20px 17px 14px;
  }

  .tool-app:not(.toolkit-home) .growth-hero h1 {
    margin: 6px 0 0;
    font-size: 2rem;
    line-height: 1.05;
    letter-spacing: 0;
  }

  .tool-app:not(.toolkit-home) .growth-hero h1 br,
  .tool-app:not(.toolkit-home) .growth-hero h1 span,
  .tool-app:not(.toolkit-home) .growth-hero p {
    display: none;
  }

  .tool-app .growth-panel {
    grid-template-columns: 1fr;
    gap: 18px;
    margin: 0 0 20px;
    padding: 18px 17px 24px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .tool-app .growth-fields input,
  .tool-app .growth-fields select {
    min-height: 50px;
    font-size: 16px;
  }

  .tool-app .growth-results {
    gap: 8px;
  }

  .tool-app .metric {
    min-height: 94px;
    padding: 14px;
  }

  .tool-app .metric strong {
    font-size: 1.45rem;
  }

  .tool-app .trainer {
    min-height: max(390px, calc(var(--tool-viewport-height) - 290px));
    border-radius: 7px;
  }

  .toolkit-trainer .growth-panel .trainer {
    order: -1;
  }

  .tool-app .target {
    width: 62px;
    height: 62px;
  }

  .tool-app .growth-cta {
    margin: 30px 17px 45px;
  }

  .pwa-view-tabs {
    position: sticky;
    z-index: 70;
    top: calc(var(--tool-app-bar-height) + var(--tool-safe-top));
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    margin: 0;
    padding: 8px 17px;
    background: rgba(18, 18, 16, .96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
  }

  .pwa-view-tabs button {
    min-height: 44px;
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 5px;
    font: inherit;
    font-size: .65rem;
    font-weight: 800;
  }

  .pwa-view-tabs button.is-active {
    color: var(--text);
    background: var(--elevated);
    border-color: rgba(255, 113, 11, .5);
  }

  .tool-app .generator-shell,
  .tool-app .calculator-layout {
    grid-template-columns: 1fr;
    width: 100%;
    padding-bottom: 22px;
  }

  .generator-shell[data-pwa-view="preview"] .generator-controls,
  .generator-shell[data-pwa-view="settings"] .generator-stage,
  .calculator-layout[data-pwa-view="inputs"] .calculator-result,
  .calculator-layout[data-pwa-view="result"] .calculator-controls {
    display: none;
  }

  .tool-app .generator-stage,
  .tool-app .generator-controls,
  .tool-app .calculator-controls,
  .tool-app .calculator-result {
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .tool-app .generator-stage {
    padding: 12px;
  }

  .tool-app .preview-frame,
  .tool-app .result-preview {
    aspect-ratio: 4 / 3;
  }

  .tool-app .generator-controls,
  .tool-app .calculator-controls {
    padding: 20px 17px;
  }

  .tool-app .preset-button,
  .tool-app .preset-devices button,
  .tool-app .unit-switch button,
  .tool-app .tool-actions button,
  .tool-app .result-copy {
    min-height: 44px;
  }

  .tool-app .icon-command,
  .tool-app .tool-color,
  .tool-app .custom-color {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
  }

  .tool-app .scene-button {
    min-height: 44px;
  }

  .tool-app .toggle-row label {
    min-height: 44px;
    padding: 8px 4px;
  }

  .tool-app input[type="range"] {
    min-height: 44px;
  }

  .tool-app .has-input-error input[type="number"] {
    border-color: #ff7a59;
    outline: 2px solid rgba(255, 122, 89, .18);
  }

  .tool-app .pwa-field-error {
    display: block;
    margin-top: 7px;
    color: #ff9a80;
    font-size: .62rem;
    font-weight: 700;
    line-height: 1.4;
    text-transform: none;
  }

  .tool-app .tool-download,
  .tool-app .size-download,
  .tool-app .visibility-guide,
  .tool-app .size-explainer,
  .tool-app .tool-faq {
    width: min(var(--max), calc(100% - 34px));
  }

  .is-standalone .tool-app-bar {
    background: #121210;
  }

  .is-standalone .tool-app .growth-hero,
  .is-standalone .tool-app .growth-cta,
  .is-standalone .tool-app .tool-download,
  .is-standalone .tool-app .size-download,
  .is-standalone .tool-app .visibility-guide,
  .is-standalone .tool-app .size-explainer,
  .is-standalone .tool-app .tool-faq {
    display: none !important;
  }

  .is-standalone .toolkit-home .tool-grid {
    padding-top: 12px;
  }

  .is-standalone .tool-app .growth-panel {
    margin-top: 0;
  }

  .is-keyboard-open body.tool-app {
    padding-bottom: 0 !important;
  }

  .is-keyboard-open .tool-bottom-nav {
    opacity: 0;
    pointer-events: none;
    transform: translateY(110%);
  }

  .is-keyboard-open .pwa-toast {
    bottom: 12px;
  }

  .is-navigating .tool-app-bar::after {
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    content: "";
    background: var(--accent);
    transform-origin: left;
    animation: tool-loading .7s ease-in-out infinite alternate;
  }
}

@media (min-width: 761px) and (max-width: 960px) and (max-height: 600px) {
  :root {
    --tool-app-bar-height: 52px;
    --tool-nav-height: 58px;
  }

  .pwa-view-tabs {
    display: none;
  }

  .generator-shell[data-pwa-view] .generator-controls,
  .generator-shell[data-pwa-view] .generator-stage,
  .calculator-layout[data-pwa-view] .calculator-controls,
  .calculator-layout[data-pwa-view] .calculator-result {
    display: block;
  }

  .tool-app .generator-shell {
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
    gap: 10px;
    padding: 10px 10px 18px;
  }

  .tool-app .calculator-layout {
    grid-template-columns: minmax(300px, .85fr) minmax(0, 1.15fr);
    gap: 10px;
    padding: 10px 10px 18px;
  }

  .tool-app .generator-stage,
  .tool-app .generator-controls,
  .tool-app .calculator-controls,
  .tool-app .calculator-result {
    border: 1px solid var(--border);
    border-radius: 7px;
  }

  .tool-app .preview-frame,
  .tool-app .result-preview {
    aspect-ratio: 16 / 9;
  }

  .tool-app .generator-controls,
  .tool-app .calculator-controls {
    padding: 16px;
  }

  .tool-bottom-nav a,
  .tool-bottom-nav button {
    min-height: 48px;
  }
}

@media (max-width: 370px) {
  .toolkit-home .growth-hero {
    grid-template-columns: 1fr;
  }

  .toolkit-home .pwa-home-install {
    width: 100%;
  }

  .toolkit-home .tool-card {
    min-height: 186px;
  }

  .tool-app-brand b {
    max-width: 160px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pwa-toast,
  .tool-bottom-nav,
  .scene-button,
  .preset-button,
  .tool-color,
  .icon-command {
    animation: none !important;
    transition: none;
  }

  * {
    scroll-behavior: auto !important;
  }
}

@keyframes tool-loading {
  from { transform: scaleX(.18); }
  to { transform: scaleX(.82); }
}