@media (max-width: 1279px) {
  .app-shell {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    height: 100vh;
    height: 100dvh;
  }

  .app-shell.layout-tablet .side-panel,
  .app-shell.layout-mobile .side-panel {
    position: absolute;
    inset: 0 0 0 auto;
    width: min(100%, 360px);
    border-left: 1px solid var(--border-subtle);
    border-radius: 0;
    z-index: 4;
    transform: translateX(100%);
    transition: transform 180ms cubic-bezier(0.2, 0, 0, 1);
  }

  .app-shell.history-open.layout-tablet .side-panel,
  .app-shell.history-open.layout-mobile .side-panel {
    transform: translateX(0);
  }
}

@media (max-width: 767px) {
  .app-shell {
    --chrome-inline-padding: 8px;
  }

  .topbar {
    padding-left: var(--chrome-inline-padding);
    padding-right: var(--chrome-inline-padding);
  }

  .topbar-title h2 {
    font-size: 1.3rem;
  }

  .form-grid,
  .converter-grid,
  .date-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .button-grid.scientific {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-template-rows: repeat(7, minmax(0, 1fr));
  }

  .button-grid.programmer {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-template-rows: repeat(6, minmax(0, 1fr));
  }

  .memory-toolbar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .scientific-angle-operators {
    justify-content: start;
  }

  .programmer-meta-row {
    gap: 0.5rem;
  }

  .programmer-memory-actions {
    margin-left: auto;
  }
}

@media (max-width: 540px) {
  .window-control {
    width: 40px;
  }

  .app-shell {
    min-height: 100vh;
    min-height: 100dvh;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }

  .display-panel {
    min-height: clamp(96px, 18dvh, 120px);
    padding-left: 12px;
    padding-right: 12px;
  }

  .memory-toolbar {
    font-size: 0.82rem;
  }

  .button-grid.standard {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .button-grid.scientific {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-template-rows: repeat(7, minmax(0, 1fr));
  }

  .scientific-operator-buttons,
  .scientific-operator-menu-trig,
  .scientific-operator-menu-function {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calculator-layout.programmer .button-grid.programmer {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    grid-template-rows: repeat(6, minmax(0, 1fr));
  }

  .calculator-layout.programmer .calc-button,
  .calculator-layout.scientific .calc-button {
    min-height: clamp(0px, 8dvh, 48px);
  }

  .programmer-operator-groups {
    flex-wrap: nowrap;
    gap: 0.9rem;
    overflow-x: auto;
  }

  .programmer-group-button {
    font-size: 0.88rem;
  }

  .calc-button {
    min-height: clamp(0px, 8.5dvh, 50px);
    font-size: clamp(0.92rem, 3.6vw, 1rem);
  }

  .display-value {
    font-size: clamp(2.8rem, 15vw, 4.4rem);
  }
}

@media (max-width: 540px) and (max-height: 760px) {
  .topbar {
    padding-bottom: 2px;
  }

  .main-panel {
    padding: 0 4px 4px;
  }

  .display-panel {
    min-height: clamp(84px, 16dvh, 104px);
  }

  .calculator-layout.scientific .display-panel,
  .calculator-layout.programmer .display-panel {
    min-height: clamp(76px, 14dvh, 96px);
  }

  .calculator-layout.scientific,
  .calculator-layout.programmer {
    gap: 0;
  }

  .calculator-layout.programmer .button-grid.programmer {
    flex: none;
    min-height: max-content;
  }

  .memory-toolbar {
    gap: 0.7rem;
    padding: 0 10px 6px;
    font-size: 0.76rem;
  }

  .calc-button {
    font-size: clamp(0.88rem, 3.3vw, 0.96rem);
  }

  .scientific-toolbar {
    padding: 0 10px 4px;
  }

  .calculator-layout.scientific .memory-toolbar {
    padding-bottom: 4px;
  }

  .scientific-angle-operators {
    gap: 0.8rem;
  }

  .scientific-angle-operators button {
    min-height: 20px;
    font-size: 0.78rem;
  }

  .scientific-operator-strip {
    padding-bottom: 4px;
  }

  .scientific-operator-buttons {
    min-height: 36px;
    gap: 0.35rem;
    padding: 0 6px;
  }

  .scientific-operator-button {
    min-height: 30px;
    font-size: 0.84rem;
    gap: 0.35rem;
  }

  .scientific-menu-toggle,
  .scientific-menu-item {
    min-height: 44px;
    padding: 0.42rem 0.4rem;
    font-size: 0.84rem;
  }

  .calculator-layout.scientific .button-grid.scientific {
    padding: 0 2px 2px;
  }

  .calculator-layout.scientific .calc-button {
    min-height: clamp(0px, 7.2dvh, 44px);
    font-size: clamp(0.82rem, 3vw, 0.92rem);
  }

  .programmer-display-panel {
    padding: 0 2px;
  }

  .programmer-hero {
    gap: 0.25rem;
  }

  .programmer-readouts {
    gap: 0;
    padding-bottom: 0.1rem;
  }

  .programmer-readout {
    min-height: 1.45rem;
    gap: 0.35rem;
    padding-right: 0;
  }

  .programmer-readout-base {
    font-size: 0.74rem;
  }

  .programmer-readout-value {
    font-size: 0.76rem;
  }

  .programmer-display-value {
    min-height: 3rem;
  }

  .programmer-meta-row {
    gap: 0.2rem 0.4rem;
    padding: 0 2px 0.05rem;
  }

  .programmer-word-size-button,
  .programmer-memory-button,
  .programmer-icon-toggle {
    min-height: 22px;
  }

  .programmer-word-size-button,
  .programmer-memory-button {
    font-size: 0.74rem;
    padding: 0.1rem 0.35rem;
  }

  .programmer-icon-toggle {
    width: 24px;
  }

  .programmer-operator-groups {
    gap: 0.65rem;
    padding: 0.15rem 4px 0.25rem;
  }

  .programmer-group-button {
    font-size: 0.82rem;
  }

  .calculator-layout.programmer .button-grid.programmer {
    padding-top: 2px;
  }

  .calculator-layout.programmer .button-grid.programmer {
    padding: 0 3px 3px;
  }
}

@media (max-width: 640px) and (max-height: 680px) {
  .main-panel {
    overflow-y: auto;
    overscroll-behavior-y: contain;
  }

  .calculator-layout.programmer .button-grid.programmer {
    flex: 1 1 auto;
    min-height: 0;
    padding: 0 2px 2px;
  }

  .calculator-layout.programmer .calc-button {
    min-height: clamp(0px, 7dvh, 29px);
    font-size: clamp(0.74rem, 2.8vw, 0.84rem);
  }

  .calculator-layout.programmer .programmer-display-panel {
    padding: 0 1px;
  }

  .calculator-layout.programmer .programmer-hero {
    gap: 0.2rem;
  }

  .calculator-layout.programmer .programmer-readout {
    min-height: 1.3rem;
  }

  .calculator-layout.programmer .programmer-display-value {
    min-height: 2.6rem;
  }

  .calculator-layout.programmer .programmer-meta-row {
    gap: 0.15rem 0.35rem;
    padding: 0 1px 0.05rem;
  }

  .calculator-layout.programmer .programmer-word-size-button,
  .calculator-layout.programmer .programmer-memory-button,
  .calculator-layout.programmer .programmer-icon-toggle {
    min-height: 20px;
  }

  .calculator-layout.programmer .programmer-word-size-button,
  .calculator-layout.programmer .programmer-memory-button {
    font-size: 0.7rem;
    padding: 0.08rem 0.28rem;
  }

  .calculator-layout.programmer .programmer-icon-toggle {
    width: 20px;
  }

  .calculator-layout.programmer .programmer-operator-groups {
    gap: 0.45rem;
    padding: 0.1rem 2px 0.2rem;
  }

  .calculator-layout.programmer .programmer-group-button {
    font-size: 0.78rem;
  }

  .calculator-layout.scientific .display-panel {
    min-height: 70px;
    padding-left: 8px;
    padding-right: 8px;
  }

  .calculator-layout.scientific .display-expression {
    min-height: 0.8rem;
    font-size: 0.72rem;
  }

  .calculator-layout.scientific .display-value {
    min-height: 2.6rem;
    font-size: clamp(2rem, 12vw, 2.8rem);
  }

  .calculator-layout.scientific .memory-toolbar {
    gap: 0.45rem;
    padding: 0 6px 3px;
    font-size: 0.66rem;
  }

  .calculator-layout.scientific .memory-toolbar button {
    min-height: 18px;
    padding: 0.05rem 0.12rem;
  }

  .calculator-layout.scientific .scientific-toolbar {
    padding: 0 6px 2px;
  }

  .calculator-layout.scientific .scientific-angle-operators {
    gap: 0.45rem;
  }

  .calculator-layout.scientific .scientific-angle-operators button {
    min-height: 17px;
    font-size: 0.7rem;
  }

  .calculator-layout.scientific .scientific-operator-strip {
    padding-bottom: 2px;
  }

  .calculator-layout.scientific .scientific-operator-buttons {
    min-height: 28px;
    gap: 0.15rem;
    padding: 0 3px;
  }

  .calculator-layout.scientific .scientific-operator-button {
    min-height: 24px;
    gap: 0.2rem;
    padding: 0.08rem 0.16rem;
    font-size: 0.68rem;
  }

  .calculator-layout.scientific .scientific-operator-icon {
    width: 12px;
    height: 12px;
  }

  .calculator-layout.scientific .button-grid.scientific {
    padding: 0 2px 2px;
  }

  .calculator-layout.scientific .calc-button {
    min-height: clamp(0px, 6.6dvh, 40px);
    font-size: clamp(0.78rem, 2.8vw, 0.88rem);
  }
}

@media (max-width: 320px) and (max-height: 520px) {
  .app-shell {
    --chrome-inline-padding: 12px;
    --chrome-top-padding: 6px;
  }

  .topbar {
    padding: var(--chrome-top-padding) var(--chrome-inline-padding) 0;
  }

  .topbar-title {
    gap: 8px;
  }

  .topbar-title h2 {
    font-size: 1.08rem;
  }

  .mode-title-row {
    gap: 8px;
  }

  .mode-glyph {
    width: 16px;
    height: 16px;
  }

  .icon-button {
    width: 28px;
    height: 28px;
    border-radius: 6px;
  }

  .main-panel {
    padding: 0 3px 3px;
  }

  .display-panel {
    min-height: 92px;
    padding-left: 12px;
    padding-right: 12px;
  }

  .display-expression {
    min-height: 0.9rem;
    font-size: 0.82rem;
  }

  .display-value {
    min-height: 3.5rem;
    font-size: clamp(3.45rem, 18vw, 4.7rem);
  }

  .memory-toolbar {
    padding: 0 6px 4px;
    font-size: 0.72rem;
  }

  .calculator-layout.scientific .display-panel {
    min-height: 74px;
    padding-left: 10px;
    padding-right: 10px;
  }

  .calculator-layout.scientific .display-expression {
    font-size: 0.74rem;
  }

  .calculator-layout.scientific .display-value {
    min-height: 2.9rem;
    font-size: clamp(2.35rem, 15vw, 3.1rem);
  }

  .calculator-layout.scientific .memory-toolbar {
    gap: 0.5rem;
    padding: 0 6px 3px;
    font-size: 0.68rem;
  }

  .calculator-layout.scientific .memory-toolbar button {
    min-height: 20px;
    padding: 0.05rem 0.15rem;
  }

  .calculator-layout.scientific .scientific-toolbar {
    padding: 0 6px 2px;
  }

  .calculator-layout.scientific .scientific-angle-operators {
    gap: 0.55rem;
  }

  .calculator-layout.scientific .scientific-angle-operators button {
    min-height: 18px;
    font-size: 0.72rem;
  }

  .calculator-layout.scientific .scientific-operator-strip {
    padding-bottom: 2px;
  }

  .calculator-layout.scientific .scientific-operator-buttons {
    min-height: 30px;
    gap: 0.2rem;
    padding: 0 4px;
  }

  .calculator-layout.scientific .scientific-operator-button {
    min-height: 26px;
    gap: 0.25rem;
    font-size: 0.72rem;
    padding: 0.1rem 0.2rem;
  }

  .calculator-layout.scientific .scientific-operator-icon {
    width: 13px;
    height: 13px;
  }

  .calculator-layout.scientific .scientific-menu-toggle,
  .calculator-layout.scientific .scientific-menu-item {
    min-height: 38px;
    padding: 0.28rem 0.24rem;
    font-size: 0.74rem;
  }

  .calculator-layout.scientific .button-grid.scientific {
    padding: 0 3px 3px;
  }

  .calculator-layout.scientific .calc-button {
    font-size: 0.84rem;
  }

  .memory-toolbar button {
    min-height: 22px;
    padding: 0.1rem 0.2rem;
  }

  .button-grid {
    padding: 0 4px 4px;
  }

  .calc-button {
    min-height: 0;
    font-size: 0.98rem;
    border-radius: 3px;
  }
}

@media (min-width: 420px) and (max-width: 500px) and (min-height: 880px) {
  .desktop-shell {
    justify-content: stretch;
    align-items: stretch;
  }

  .app-shell {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    height: 100vh;
    height: 100dvh;
    margin: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .topbar {
    padding: var(--chrome-top-padding) var(--chrome-inline-padding) 2px;
  }

  .topbar-title h2 {
    font-size: 1.15rem;
  }

  .mode-title-row {
    gap: 8px;
  }

  .mode-glyph {
    width: 16px;
    height: 16px;
  }

  .icon-button {
    width: 30px;
    height: 30px;
  }

  .display-panel {
    min-height: 206px;
    padding: 0 14px 8px;
  }

  .display-expression {
    min-height: 1.25rem;
    font-size: 0.96rem;
  }

  .display-value {
    min-height: 4.8rem;
    font-size: clamp(4.7rem, 17vw, 5.35rem);
  }

  .memory-toolbar {
    padding: 0 6px 8px;
  }

  .memory-toolbar button {
    min-height: 28px;
    font-size: 0.88rem;
  }

  .button-grid {
    padding: 0 4px 4px;
  }

  .calc-button {
    border-radius: 4px;
  }
}