:root {
  color-scheme: light;
  --ink: #171717;
  --paper: #f4f1e8;
  --panel: rgba(250, 249, 244, 0.88);
  --line: rgba(23, 23, 23, 0.18);
  --focus: #006f84;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  scrollbar-width: none;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body:not(.stack-mode) {
  overflow: hidden;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

button,
select,
input {
  font: inherit;
}

.app {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
}

.stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  isolation: isolate;
  background: #f8f4ea;
  -webkit-user-select: none;
  user-select: none;
}

.scroll-spacer {
  display: none;
  height: 640vh;
}

body.stack-mode .scroll-spacer {
  display: block;
}

.pattern {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform-origin: center;
  user-select: none;
  pointer-events: none;
  will-change: opacity;
}

.pattern-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.panel {
  position: fixed;
  right: clamp(16px, 4vw, 44px);
  bottom: clamp(16px, 4vw, 44px);
  width: min(360px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  padding: 18px;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(23, 23, 23, 0.14);
  backdrop-filter: blur(16px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

body.menu-hidden .panel {
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  pointer-events: none;
}

.panel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

.label,
.value {
  margin: 0;
}

.label,
.field span {
  color: rgba(23, 23, 23, 0.66);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.value {
  margin-top: 5px;
  font-size: 1rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 247, 0.7);
}

.mode-button {
  min-height: 36px;
  border: 0;
  border-radius: 6px;
  color: rgba(23, 23, 23, 0.7);
  background: transparent;
  cursor: pointer;
}

.mode-button.is-active {
  color: var(--ink);
  background: #fffdf7;
  box-shadow: 0 1px 8px rgba(23, 23, 23, 0.1);
}

.mode-controls {
  margin-top: 14px;
}

.mode-controls.is-hidden {
  display: none;
}

.export-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.utility-button {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fffdf7;
  cursor: pointer;
}

.show-menu-button {
  position: fixed;
  right: clamp(16px, 4vw, 44px);
  bottom: clamp(16px, 4vw, 44px);
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--panel);
  box-shadow: 0 12px 34px rgba(23, 23, 23, 0.14);
  backdrop-filter: blur(16px);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 180ms ease, visibility 180ms ease;
}

body.menu-hidden .show-menu-button {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.scroll-cue {
  position: fixed;
  left: 50%;
  top: 50%;
  display: grid;
  justify-items: center;
  gap: 12px;
  color: rgba(23, 23, 23, 0.82);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, calc(-50% + 12px));
  transition: opacity 220ms ease, transform 220ms ease, visibility 220ms ease;
  z-index: 2;
}

.scroll-cue span:first-child {
  -webkit-text-stroke: 1.2px rgba(255, 255, 255, 0.82);
  paint-order: stroke fill;
  text-shadow: 0 1px 5px rgba(255, 255, 255, 0.72);
}

.scroll-cue.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%);
}

.scroll-cue-line {
  position: relative;
  display: block;
  width: 3px;
  height: 58px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(23, 23, 23, 0.22);
}

.scroll-cue-line::after {
  position: absolute;
  top: -24px;
  left: 0;
  width: 100%;
  height: 24px;
  border-radius: inherit;
  background: var(--ink);
  content: "";
  animation: scrollCueDrop 1.15s ease-in-out infinite;
}

@keyframes scrollCueDrop {
  0% {
    transform: translateY(0);
    opacity: 0;
  }

  25% {
    opacity: 1;
  }

  100% {
    transform: translateY(60px);
    opacity: 0;
  }
}

.icon-button {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fffdf7;
  cursor: pointer;
}

.icon-button span {
  display: block;
  font-size: 1.35rem;
  line-height: 1;
}

.icon-button:hover,
.utility-button:hover,
.show-menu-button:hover,
.icon-button:focus-visible {
  border-color: var(--focus);
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.check-field {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: rgba(23, 23, 23, 0.76);
}

select,
input[type="range"] {
  width: 100%;
}

select {
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fffdf7;
}

input[type="range"] {
  accent-color: var(--focus);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--focus);
}

:focus-visible {
  outline: 3px solid rgba(0, 111, 132, 0.28);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .panel {
    right: 12px;
    bottom: 12px;
    width: calc(100vw - 24px);
    max-height: calc(100dvh - 24px);
  }

  .show-menu-button {
    right: 12px;
    bottom: 12px;
  }
}

@media (orientation: landscape) and (max-height: 520px) {
  .panel {
    right: max(8px, env(safe-area-inset-right));
    bottom: max(8px, env(safe-area-inset-bottom));
    width: min(760px, calc(100vw - 16px - env(safe-area-inset-left) - env(safe-area-inset-right)));
    max-height: calc(100dvh - 16px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    padding: 12px;
    overflow: visible;
  }

  body.menu-hidden .panel {
    transform: translateY(0);
  }

  .panel-row {
    gap: 10px;
    margin-bottom: 10px;
  }

  .mode-controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px 10px;
    margin-top: 10px;
  }

  .field {
    gap: 5px;
    margin-top: 0;
  }

  .export-row {
    margin-top: 9px;
  }

  .mode-button,
  .utility-button {
    min-height: 32px;
  }

  .icon-button {
    width: 36px;
    height: 36px;
  }

  select {
    height: 36px;
  }

  .show-menu-button {
    right: max(8px, env(safe-area-inset-right));
    bottom: max(8px, env(safe-area-inset-bottom));
  }
}

@media (orientation: landscape) and (max-height: 520px) and (max-width: 760px) {
  .mode-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}