:root {
  color-scheme: dark;
  --bg: #080907;
  --panel: #15170f;
  --panel-2: #10120d;
  --text: #f2f1df;
  --muted: #b8b19a;
  --line: #3b3a2c;
  --crt: #76f7a0;
  --amber: #e0b45e;
  --rust: #b86b4f;
  --ink: #060806;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, rgba(118, 247, 160, 0.07), transparent 420px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 80px),
    var(--bg);
  color: var(--text);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="number"] {
  border-radius: 0;
}

.tool-header,
main,
.tool-footer {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.tool-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 72px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.brand,
.tool-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  text-decoration: none;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--crt);
  color: var(--crt);
  font-family: Consolas, "Courier New", monospace;
  box-shadow: inset 0 0 18px rgba(118, 247, 160, 0.12);
}

.brand strong,
.brand small {
  display: block;
}

.brand small,
.tool-nav a,
.kicker,
button,
select,
input[type="number"],
.canvas-stats,
.tool-footer,
.status-text {
  font-family: Consolas, "Courier New", monospace;
}

.brand small {
  color: var(--muted);
  font-size: 0.72rem;
}

.tool-nav {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tool-nav a {
  color: var(--muted);
  font-size: 0.8rem;
  text-decoration: none;
}

.tool-nav a:hover {
  color: var(--crt);
}

.hero,
.workbench,
.animation-grid,
.export-panel,
.details-panel {
  margin-top: 34px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 260px);
  gap: 24px;
  align-items: end;
  padding: clamp(36px, 7vw, 76px) 0 22px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--crt);
  font-size: 0.78rem;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(3rem, 8vw, 6.8rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
}

h2 small,
.hero p span,
.export-panel h2 span,
.export-panel h2 small {
  display: block;
}

h2 small,
.hero p span + span {
  margin-top: 6px;
  color: var(--amber);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  font-weight: 500;
}

.hero p {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.bench-note {
  display: grid;
  gap: 8px;
}

.bench-note span {
  border-left: 3px solid var(--crt);
  background: rgba(21, 23, 15, 0.82);
  padding: 8px 10px;
  color: var(--text);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.82rem;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(340px, 1fr) minmax(300px, 380px);
  gap: 16px;
  align-items: start;
}

.canvas-panel,
.control-panel .panel,
.preview-panel,
.frames-panel,
.export-panel,
.details-panel {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(118, 247, 160, 0.045), transparent 42%),
    rgba(19, 21, 15, 0.9);
}

.canvas-panel,
.preview-panel,
.frames-panel,
.export-panel,
.details-panel,
.panel {
  padding: 18px;
}

.canvas-head,
.canvas-stats,
.button-row,
.frame-actions,
.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.canvas-head {
  justify-content: space-between;
  margin-bottom: 16px;
}

.canvas-stats span {
  border: 1px solid rgba(216, 197, 143, 0.28);
  padding: 4px 8px;
  color: var(--amber);
  font-size: 0.78rem;
}

.canvas-wrap {
  display: grid;
  place-items: center;
  overflow: auto;
  padding: 14px;
  border: 1px solid rgba(118, 247, 160, 0.26);
  background:
    linear-gradient(45deg, rgba(242, 241, 223, 0.08) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(242, 241, 223, 0.08) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(242, 241, 223, 0.08) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(242, 241, 223, 0.08) 75%),
    rgba(8, 9, 7, 0.62);
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-size: 16px 16px;
}

#pixelCanvas {
  display: block;
  width: min(100%, 560px);
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  cursor: crosshair;
  touch-action: none;
}

#pixelCanvas[data-zoom="1"] {
  width: 512px;
  max-width: none;
}

#pixelCanvas[data-zoom="2"] {
  width: 768px;
  max-width: none;
}

#pixelCanvas[data-zoom="3"] {
  width: 1024px;
  max-width: none;
}

#pixelCanvas.is-selecting {
  cursor: cell;
}

.control-panel {
  display: grid;
  gap: 16px;
}

.panel {
  border: 1px solid var(--line);
  background: rgba(8, 9, 7, 0.42);
}

.import-panel {
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.import-panel.is-dragging {
  border-color: var(--crt);
  background:
    linear-gradient(135deg, rgba(118, 247, 160, 0.12), transparent 48%),
    rgba(8, 9, 7, 0.66);
  box-shadow: inset 0 0 0 1px rgba(118, 247, 160, 0.28);
}

.drop-note {
  margin: 10px 0 0;
  border: 1px dashed rgba(118, 247, 160, 0.32);
  padding: 8px 10px;
  color: var(--muted);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.78rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.selection-actions,
.edit-actions {
  margin-top: 0;
}

button {
  display: inline-grid;
  place-items: center;
  gap: 2px;
  min-height: 38px;
  border: 1px solid rgba(242, 241, 223, 0.25);
  background: rgba(8, 9, 7, 0.64);
  color: var(--text);
  padding: 8px 11px;
  font-weight: 700;
  cursor: pointer;
}

button span,
button small {
  display: block;
  line-height: 1.15;
}

button small {
  color: var(--muted);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
}

button:hover:not(:disabled),
button.is-active {
  border-color: var(--crt);
  color: var(--crt);
}

button:hover:not(:disabled) small,
button.is-active small {
  color: rgba(118, 247, 160, 0.78);
}

button:disabled {
  border-color: rgba(184, 177, 154, 0.24);
  color: rgba(184, 177, 154, 0.58);
  cursor: not-allowed;
}

.color-row,
.settings-grid label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 700;
}

.color-row {
  grid-template-columns: minmax(0, 1fr) 72px;
  align-items: center;
  margin-top: 14px;
}

input[type="color"] {
  width: 72px;
  height: 38px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 3px;
}

.palette {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 6px;
  margin-top: 14px;
}

.swatch {
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 26px;
  border: 1px solid rgba(242, 241, 223, 0.2);
  background: var(--swatch);
  padding: 0;
}

.swatch.is-active {
  outline: 2px solid var(--crt);
  outline-offset: 2px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

select,
input[type="number"] {
  min-height: 36px;
  border: 1px solid rgba(216, 197, 143, 0.34);
  background: rgba(8, 9, 7, 0.72);
  color: var(--text);
  padding: 5px 8px;
}

.check-row {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.button-row,
.frame-actions {
  margin-top: 14px;
}

.animation-grid {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 16px;
}

.section-head {
  margin-bottom: 16px;
}

#previewCanvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(118, 247, 160, 0.26);
  background: rgba(8, 9, 7, 0.64);
  image-rendering: pixelated;
}

.frame-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.frame-thumb {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  background: rgba(8, 9, 7, 0.48);
  padding: 7px;
  color: var(--muted);
  text-align: left;
}

.frame-thumb.is-active {
  border-color: var(--crt);
  color: var(--crt);
}

.frame-thumb canvas {
  width: 100%;
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  background: rgba(8, 9, 7, 0.66);
}

.export-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 24px;
  align-items: center;
}

.export-actions {
  justify-content: flex-end;
}

#statusText {
  width: 100%;
  margin: 0;
  color: var(--amber);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.82rem;
  text-align: right;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.details-panel {
  margin-bottom: 34px;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.detail-card {
  min-height: 190px;
  padding: 16px;
  border: 1px solid rgba(216, 197, 143, 0.25);
  background:
    linear-gradient(180deg, rgba(216, 197, 143, 0.055), transparent 46%),
    rgba(8, 9, 7, 0.44);
}

.detail-card h3,
.detail-card p {
  margin: 0;
}

.detail-card h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.detail-card p {
  color: var(--muted);
  font-size: 0.94rem;
}

.detail-card p span,
.shortcut-list span {
  display: block;
  grid-column: 3;
}

.detail-card p span + span {
  margin-top: 7px;
  color: rgba(242, 241, 223, 0.78);
}

.shortcut-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.shortcut-list li {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 5px;
  align-items: center;
  color: var(--muted);
  font-size: 0.86rem;
}

kbd {
  min-width: 34px;
  border: 1px solid rgba(118, 247, 160, 0.28);
  background: rgba(8, 9, 7, 0.72);
  color: var(--crt);
  padding: 2px 5px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.76rem;
  text-align: center;
}

.tool-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 26px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.tool-footer div,
.tool-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.tool-footer nav {
  justify-content: flex-end;
}

.tool-footer a {
  color: var(--muted);
  font-family: Consolas, "Courier New", monospace;
  text-decoration: none;
}

.tool-footer a:hover {
  color: var(--crt);
}

@media (max-width: 900px) {
  .tool-header,
  .hero,
  .workbench,
  .animation-grid,
  .export-panel,
  .details-grid {
    grid-template-columns: 1fr;
  }

  .tool-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .tool-nav {
    justify-content: flex-start;
  }

  .export-actions {
    justify-content: flex-start;
  }

  #statusText {
    text-align: left;
  }
}

@media (max-width: 560px) {
  .tool-header,
  main,
  .tool-footer {
    width: min(100% - 20px, var(--max));
  }

  h1 {
    font-size: clamp(2.7rem, 16vw, 4rem);
  }

  .settings-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }

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

  .tool-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .tool-footer nav {
    justify-content: flex-start;
  }
}