/* ========== Demo Page Layout Styles ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: #f5f6fa;
  color: #1f1f1f;
  min-height: 100vh;
}

.demo-header {
  background: linear-gradient(135deg, #2f54eb 0%, #597ef7 100%);
  color: #fff;
  padding: 28px 40px;
  text-align: center;
}
.demo-header h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.demo-header p {
  margin-top: 6px;
  font-size: 13px;
  opacity: 0.85;
}
.demo-header .demo-version {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  vertical-align: middle;
  background: rgba(255, 255, 255, 0.22);
  border-radius: 10px;
}


.demo-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 24px 60px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Bottom grid layout */
.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 20px;
}
.demo-grid > .card {
  min-width: 0;
}

/* ---- Card common ---- */
.card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
  padding: 24px;
}
.card-title {
  font-size: 15px;
  font-weight: 700;
  color: #1f1f1f;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: #2f54eb;
  border-radius: 2px;
}
/* ---- Picker Demo Area ---- */
.demo-picker-area {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.demo-picker-area .input-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.demo-picker-area label {
  font-size: 13px;
  font-weight: 600;
  color: #595959;
  white-space: nowrap;
}

.param-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.param-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.param-row label {
  width: 80px;
  flex-shrink: 0;
  color: #595959;
  font-weight: 500;
  text-align: right;
  padding: 6px 0;
}
.radio-label {
  width: auto !important;
  font-weight: 400 !important;
  cursor: pointer;
}
.radio-label input { margin-right: 2px; }
.param-row select,
.param-row input[type="text"],
.param-row input[type="color"] {
  padding: 6px 10px;
  border: 1px solid #d9d9d9;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  color: #1f1f1f;
  background: #fff;
  max-width: 100%;
}
.param-row select:focus,
.param-row input:focus {
  outline: none;
  border-color: #2f54eb;
  box-shadow: 0 0 0 2px rgba(47,84,235,0.1);
}


.json-section {
  color: #6a9955;
  font-style: italic;
  -webkit-user-select: none;
  user-select: none;
}

.params-text-area pre {
  background: #fafafa;
  border: 1px solid #f0f0f0;
  border-radius: 8px;
  padding: 14px 16px;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
  color: #262626;
  overflow-x: auto;
  max-height: 200px;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-area pre {
  background: #1e1e1e;
  color: #d4d4d4;
  border-radius: 8px;
  padding: 16px;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
  overflow-x: auto;
  max-height: 260px;
}
.code-area .code-kw { color: #569cd6; }
.code-area .code-str { color: #ce9178; }
.code-area .code-fn { color: #dcdcaa; }
.code-area .code-num { color: #b5cea8; }
.code-area .code-cmt { color: #6a9955; }

.json-area pre {
  background: #fafafa;
  border: 1px solid #f0f0f0;
  border-radius: 8px;
  padding: 14px 16px;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
  color: #262626;
  overflow-x: auto;
  min-height: 100px;
  max-height: 480px;
  white-space: pre-wrap;
  word-break: break-all;
  transition: background 0.3s;
}
.json-area pre.has-value {
  background: #f6ffed;
  border-color: #b7eb8f;
}
.json-key { color: #cf1322; }
.json-string { color: #389e0d; }
.json-null { color: #bfbfbf; font-style: italic; }

/* ---- Trigger Input (Demo inline styles) ---- */
.dtrpicker-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1.5px solid #d9d9d9;
  border-radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 14px;
  color: #262626;
  background: #fff;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 240px;
  width: 100%;
  -webkit-user-select: none;
  user-select: none;
  position: relative;
  box-sizing: border-box;
}
.dtrpicker-trigger:hover {
  border-color: #2f54eb;
  box-shadow: 0 0 0 2px rgba(47, 84, 235, 0.1);
}
.dtrpicker-trigger:focus,
.dtrpicker-trigger.dtrpicker-active {
  outline: none;
  border-color: #2f54eb;
  box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.15);
}
/* Clear button */
.picker-wrapper {
  position: relative;
  display: inline-block;
  flex: 1;
  min-width: 0;
}
.dtrpicker-clear-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: #bfbfbf;
  font-size: 14px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  line-height: 1;
  z-index: 1;
  transition: color 0.15s;
}
.dtrpicker-clear-btn:hover {
  color: #ff4d4f;
}
.dtrpicker-clear-btn.visible {
  display: inline-block;
}

/* ---- Demo Hint ---- */
.demo-hint {
  font-size: 12px;
  color: #8c8c8c;
  margin-top: 4px;
}

/* ---- Responsive ---- */
@media (max-width: 800px) {
  .demo-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .demo-header {
    padding: 20px 16px;
  }
  .demo-header h1 {
    font-size: 20px;
  }
  .demo-header p {
    font-size: 12px;
  }
  .demo-main {
    padding: 16px 12px 40px;
    gap: 12px;
  }
  .card {
    padding: 16px;
  }
  .picker-wrapper {
    width: 100%;
  }
  .dtrpicker-trigger {
    min-width: 0;
    width: 100%;
    font-size: 13px;
    padding: 8px 12px;
  }
  .demo-picker-area .input-row {
    flex-direction: column;
    align-items: stretch;
  }
  .param-row {
    flex-wrap: wrap;
    gap: 6px;
  }
  .param-row label {
    width: auto;
    text-align: left;
    min-width: 50px;
  }
  .param-apply-btn {
    width: 100%;
    text-align: center;
  }

  /* Pre blocks adaption for 4-card area */
  .params-text-area pre,
  .code-area pre,
  .json-area pre {
    padding: 10px 12px;
    font-size: 11px;
    line-height: 1.5;
    max-height: 160px;
  }
  .card-title {
    margin-bottom: 12px;
  }
}

@media (max-width: 400px) {
  .demo-header h1 {
    font-size: 17px;
  }
  .card-title {
    font-size: 13px;
  }
  .param-row {
    font-size: 12px;
  }
  .param-row select,
  .param-row input[type="text"] {
    font-size: 12px;
    padding: 4px 8px;
    flex: 1;
    min-width: 0;
  }
  .radio-label {
    font-size: 12px;
  }
}