:root {
  color-scheme: dark;
  --bg: #050505;
  --bg-soft: #0b0b0b;
  --panel: #111111;
  --panel-raised: #171717;
  --field: #0a0a0a;
  --line: #2b2b2b;
  --line-strong: #5f5f5f;
  --text: #f4f4f4;
  --text-soft: #b8b8b8;
  --text-muted: #8a8a8a;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.44);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background: var(--bg);
  font-family: "Segoe UI Variable", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  min-height: 100vh;
}

button,
input,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

label {
  display: block;
}

.app-shell {
  min-height: 100vh;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 280px),
    var(--bg);
}

.hero,
.panel,
.viewer-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  padding: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 16px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--text-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero p {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.api-box {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}

.api-box label {
  margin-bottom: 8px;
  color: var(--text-soft);
  font-size: 13px;
}

.api-row {
  display: flex;
  gap: 8px;
}

.api-actions {
  margin-top: 8px;
}

.api-actions .button {
  flex: 1;
}

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr) 320px;
  gap: 14px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 0;
}

.layout > *,
.hero > *,
.api-box,
.api-row > *,
.panel,
.viewer-panel {
  min-width: 0;
}

.panel {
  padding: 16px;
  overflow: auto;
}

.viewer-panel {
  position: relative;
  overflow: hidden;
  min-height: 72vh;
  background: #000000;
}

.viewer {
  width: 100%;
  height: 100%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    #050505;
  background-size: 44px 44px;
}

.viewer canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

.viewer canvas:active {
  cursor: grabbing;
}

.panel-section + .panel-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

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

.panel h2 {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.3;
  letter-spacing: 0;
}

.muted {
  margin: 0 0 14px;
  color: var(--text-soft);
  line-height: 1.7;
}

.text-input,
.text-area,
#apiBaseInput {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--text);
  background: var(--field);
  outline: none;
}

.text-input:focus,
.text-area:focus,
#apiBaseInput:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.text-area {
  min-height: 124px;
  resize: vertical;
}

.text-area.compact {
  min-height: 104px;
}

.button {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--text);
  background: var(--panel-raised);
  cursor: pointer;
  white-space: nowrap;
}

.button:hover {
  border-color: var(--white);
  background: #202020;
}

.button.primary {
  border-color: var(--white);
  color: #050505;
  background: var(--white);
}

.button.primary:hover {
  background: #dcdcdc;
}

.button.danger {
  color: var(--white);
  background: #0f0f0f;
  border-color: #777777;
}

.button.danger:hover {
  border-color: var(--white);
  background: #1f1f1f;
}

.button.wide {
  width: 100%;
}

.gallery-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.gallery-item {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  text-align: left;
  background: var(--bg-soft);
  cursor: pointer;
}

.gallery-item:hover {
  border-color: var(--line-strong);
}

.gallery-item.active {
  border-color: var(--white);
  background: #1d1d1d;
}

.gallery-item strong,
.gallery-item span {
  display: block;
}

.gallery-item strong {
  overflow-wrap: anywhere;
}

.gallery-item span {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 12px;
}

.viewer-top,
.toolbar {
  position: absolute;
  left: 16px;
  right: 16px;
  z-index: 5;
}

.viewer-top {
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
  pointer-events: none;
}

.viewer-hud,
.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar {
  bottom: 16px;
}

.chip {
  min-height: 36px;
  max-width: 100%;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  color: var(--text);
  background: rgba(7, 7, 7, 0.88);
  overflow-wrap: anywhere;
  pointer-events: auto;
}

.viewer-modebar {
  display: inline-grid;
  grid-template-columns: repeat(4, minmax(78px, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(7, 7, 7, 0.9);
  pointer-events: auto;
}

.mode-button {
  min-height: 34px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  color: var(--text-soft);
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
}

.mode-button:hover {
  color: var(--white);
  background: #242424;
}

.mode-button.active {
  color: #050505;
  background: var(--white);
}

.meta-grid {
  display: grid;
  gap: 10px;
  margin: 0;
}

.meta-grid div {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  background: var(--bg-soft);
}

.meta-grid dt {
  margin-bottom: 7px;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
}

.meta-grid dd {
  margin: 0;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

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

.field + .field {
  margin-top: 12px;
}

.form-grid .field + .field {
  margin-top: 0;
}

.field span {
  display: block;
  margin-bottom: 8px;
  color: var(--text-soft);
  font-size: 13px;
}

.form-actions {
  margin-top: 14px;
}

.code-block {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  max-width: 100%;
  overflow: auto;
  color: var(--text);
  background: #050505;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

@media (max-width: 1380px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    min-height: 62vh;
  }

  .detail-panel {
    overflow: visible;
  }
}

@media (max-width: 900px) {
  .app-shell {
    padding: 10px;
    gap: 10px;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .api-row {
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    min-height: 56vh;
  }

  .viewer-top,
  .toolbar {
    left: 10px;
    right: 10px;
  }
}

@media (max-width: 640px) {
  .hero,
  .panel {
    padding: 14px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .viewer-panel {
    min-height: 520px;
  }

  .viewer-modebar {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar .button {
    width: 100%;
    padding: 0 10px;
  }
}