:root {
  color-scheme: light;
  --ink: #15171a;
  --muted: #646b75;
  --line: #d7dce2;
  --paper: #f5f7fa;
  --panel: #ffffff;
  --accent: #e63b2e;
  --accent-2: #0f8f8a;
  --accent-3: #f3c230;
  --shadow: 0 18px 45px rgba(18, 24, 31, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 7px;
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover {
  border-color: #aeb6c1;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(330px, 420px) 1fr;
  min-height: 100vh;
}

.control-panel {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 28px;
  background: var(--panel);
  border-right: 1px solid var(--line);
}

.app-header {
  margin-bottom: 26px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 31px;
  line-height: 1.15;
}

h2 {
  margin-bottom: 4px;
  font-size: 22px;
}

h3 {
  margin-bottom: 0;
  font-size: 18px;
}

.panel-stack {
  display: grid;
  gap: 18px;
}

.input-block {
  display: grid;
  gap: 12px;
}

.block-heading {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.block-heading > span,
.api-key-block summary > span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.block-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.api-key-block {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.api-key-block summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

.api-key-block summary::-webkit-details-marker {
  display: none;
}

.api-key-block summary::after {
  content: "設定";
  margin-left: auto;
  color: var(--muted);
  font-size: 12px;
  line-height: 30px;
}

.api-key-block[open] summary {
  margin-bottom: 12px;
}

.api-key-block[open] summary::after {
  content: "閉じる";
}

.drop-zone {
  display: grid;
  place-items: center;
  min-height: 108px;
  border: 1px dashed #aab3bd;
  border-radius: 8px;
  background: #fbfcfd;
  text-align: center;
  cursor: pointer;
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.drop-zone small {
  color: var(--muted);
}

.drop-zone.is-dragging {
  border-color: var(--accent);
  background: #fff4f2;
}

.thumb-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
}

.thumb-strip img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
}

.script-block textarea {
  width: 100%;
  min-height: 170px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px;
  line-height: 1.65;
}

.api-key-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.api-key-row input {
  min-width: 0;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 11px;
}

.wide-input {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 11px;
}

.api-key-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.api-key-actions button {
  min-height: 32px;
  padding: 0 10px;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.settings-grid.single-setting {
  grid-template-columns: 1fr;
}

.settings-grid label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.settings-grid input {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 10px;
  color: var(--ink);
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary-action {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.workspace {
  padding: 32px;
  overflow: auto;
}

.workspace-top,
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.workspace-top {
  margin-bottom: 24px;
}

.status {
  max-width: 360px;
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.headline-board,
.result-board {
  margin-bottom: 28px;
}

.section-title {
  margin-bottom: 12px;
}

.headline-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.headline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.headline-item:has(input:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(230, 59, 46, 0.15);
}

.headline-item input[type="radio"] {
  margin-top: 6px;
  accent-color: var(--accent);
}

.headline-body {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.headline-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.headline-item textarea {
  width: 100%;
  border: 0;
  padding: 0;
  resize: vertical;
  outline: none;
  color: var(--ink);
  background: transparent;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
}

.headline-item small {
  color: var(--muted);
}

.restore-headline {
  min-height: 30px;
  padding: 0 10px;
  font-size: 12px;
}

.restore-headline:disabled {
  color: #a2a9b3;
  cursor: default;
}

.button-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.design-generate-row {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 12px;
}

.download-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.download-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.download-actions[hidden] {
  display: none;
}

.text-layer-section {
  margin-top: 18px;
}

.text-layer-section[hidden] {
  display: none;
}

.text-layer-result {
  display: grid;
  place-items: center stretch;
  gap: 12px;
  min-height: 240px;
  overflow: hidden;
  border: 1px dashed #aab3bd;
  border-radius: 8px;
  background:
    linear-gradient(45deg, #eef1f5 25%, transparent 25%),
    linear-gradient(-45deg, #eef1f5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eef1f5 75%),
    linear-gradient(-45deg, transparent 75%, #eef1f5 75%);
  background-color: #fff;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
}

.text-layer-result p {
  margin: 0;
  color: var(--muted);
  text-align: center;
}

.text-layer-result img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.text-layer-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
}

.quality-report {
  width: 100%;
  padding: 14px 16px;
  border-top: 1px solid rgba(15, 23, 42, 0.12);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
}

.quality-report strong {
  display: block;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.quality-report p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.quality-report ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.quality-good strong {
  color: #117a52;
}

.quality-warn strong {
  color: #9a5a00;
}

.quality-bad strong {
  color: #b3261e;
}

.text-style-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: -2px 0 12px;
}

.text-style-controls[hidden] {
  display: none;
}

.text-style-controls button {
  min-height: 34px;
  padding: 0 11px;
  font-size: 13px;
}

.text-style-controls button.is-active {
  border-color: var(--accent);
  background: #fff4f2;
  color: var(--accent);
  font-weight: 800;
}

.reference-report {
  margin: -2px 0 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.reference-report strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

.reference-report[hidden] {
  display: none;
}

.design-result {
  display: grid;
  place-items: center;
  min-height: 360px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.design-result p {
  max-width: 420px;
  margin: 0;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

.loading-box {
  width: min(420px, calc(100% - 48px));
  display: grid;
  gap: 12px;
  text-align: center;
}

.loading-box strong {
  font-size: 16px;
}

.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7ebf0;
}

.progress-bar {
  width: 44%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-3), var(--accent-2));
  animation: loading-slide 1.25s ease-in-out infinite;
}

@keyframes loading-slide {
  0% {
    transform: translateX(-110%);
  }
  100% {
    transform: translateX(260%);
  }
}

.design-result img,
.design-result canvas {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #111;
}

@media (max-width: 980px) {
  .app-shell {
    display: block;
  }

  .control-panel {
    position: static;
    height: auto;
  }

  .workspace {
    padding: 24px;
  }
}

@media (max-width: 560px) {
  .control-panel,
  .workspace {
    padding: 18px;
  }

  .workspace-top,
  .section-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .status {
    text-align: left;
  }

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