:root {
  color-scheme: light dark;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
  font-size: 16px;
  --bg: #f8fafc;
  --panel: #ffffff;
  --panel-dark: #111827;
  --border: #e2e8f0;
  --border-dark: #1f2937;
  --text: #0f172a;
  --text-dark: #f8fafc;
  --accent: #2563eb;
  --accent-dark: #60a5fa;
  --muted: #64748b;
  --muted-dark: #94a3b8;
  --shadow: 0 15px 35px rgba(15, 23, 42, 0.12);
}

@media (prefers-color-scheme: dark) {
  body {
    background: #020617;
    color: var(--text-dark);
  }
  .panel {
    background: var(--panel-dark);
    border-color: var(--border-dark);
  }
  .encoded-input,
  .query-input,
  .base-grid input {
    background: rgba(15, 23, 42, 0.6);
    border-color: var(--border-dark);
    color: var(--text-dark);
  }
  .ghost-btn {
    border-color: rgba(96, 165, 250, 0.4);
    color: var(--accent-dark);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 2rem 1.25rem 3rem;
}

.app {
  width: min(960px, 100%);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

h1 {
  font-size: clamp(2rem, 3vw, 2.75rem);
  margin: 0;
}

h2 {
  margin: 0;
  font-size: 1.1rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  color: var(--muted);
  margin: 0;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  max-width: 60ch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.field-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.encoded-input {
  width: 100%;
  min-height: 120px;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  resize: vertical;
}

.status-line {
  min-height: 1.5rem;
  margin-top: 0.75rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.status-line.error {
  color: #dc2626;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.base-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.field-group input {
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 0.8rem 0.9rem;
  font-size: 1rem;
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}

.path-field {
  grid-column: 1 / -1;
}

.query-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-height: 56px;
}

.query-list:empty::after {
  content: '还没有 Query 参数';
  color: var(--muted);
  font-size: 0.95rem;
}

.query-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

.query-input {
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 0.7rem 0.9rem;
  font-size: 0.95rem;
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  resize: none;
}

.query-value {
  min-height: 42px;
  line-height: 1.35;
  overflow: hidden;
  resize: vertical;
}

.eq {
  font-size: 1.25rem;
  color: var(--muted);
  text-align: center;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: rgba(15, 23, 42, 0.05);
  color: #dc2626;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.icon-btn:hover {
  background: rgba(220, 38, 38, 0.1);
}

.ghost-btn {
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  border: 1px dashed var(--accent);
  background: transparent;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.ghost-btn:hover {
  background: rgba(37, 99, 235, 0.08);
}

@media (max-width: 640px) {
  .query-row {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      'key key'
      'value value'
      'btn btn';
  }
  .query-row .eq {
    display: none;
  }
  .query-row .query-input[name='key'] {
    grid-area: key;
  }
  .query-row .query-input[name='value'] {
    grid-area: value;
  }
  .query-row .icon-btn {
    grid-area: btn;
    justify-self: flex-end;
  }
}