:root {
  --bg: #050816;
  --bg-card: #111827;
  --bg-card-soft: #020617;
  --border-subtle: #1e293b;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.15);
  --accent-strong: #2563eb;
  --accent-success: #22c55e;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --text-subtle: #6b7280;
  --error: #f97373;
  --radius-xl: 18px;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.85);
  --shadow-light: 0 8px 20px rgba(15, 23, 42, 0.7);
  --transition-fast: 0.15s ease-out;
  --transition-med: 0.25s ease-out;
}

/* Global reset-ish */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1e293b 0, #020617 50%, #000 100%);
  color: var(--text-main);
}

/* Layout */
.page {
  min-height: 100vh;
  max-width: 1024px;
  margin: 0 auto;
  padding: 24px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.header {
  text-align: left;
  padding: 16px 8px 8px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 2vw + 1rem, 2.2rem);
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.subtitle.secondary {
  margin-top: 4px;
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: linear-gradient(135deg, #020617 0, #020617 40%, #050816 100%);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  padding: 18px 18px 20px;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
}

.card-title {
  margin: 0 0 16px;
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.form-group {
  flex: 1;
  min-width: 180px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

select,
input[type="number"],
input[type="text"],
textarea {
  background: var(--bg-card-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 8px 10px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast), background-color var(--transition-fast);
}

select:focus,
input[type="number"]:focus,
input[type="text"]:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft);
  background: #020617;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
}

/* Buttons */
.btn {
  border: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background-color var(--transition-med), transform 0.08s ease-out,
    box-shadow var(--transition-med), border-color var(--transition-med),
    color var(--transition-med);
  font-weight: 500;
  white-space: nowrap;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent) 0, var(--accent-strong) 100%);
  color: #f9fafb;
  box-shadow: var(--shadow-light);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.35);
}

.btn.secondary {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn.secondary:hover {
  background: rgba(15, 23, 42, 1);
  border-color: var(--accent);
}

.btn.ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.btn.ghost:hover {
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--text-main);
}

.btn.small {
  padding: 6px 10px;
  font-size: 0.8rem;
}

.btn.tiny {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* Textarea actions */
.textarea-actions {
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Advanced options */
.advanced {
  margin-top: 4px;
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(51, 65, 85, 0.9);
  padding: 8px 10px 8px;
}

.advanced summary {
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-muted);
  list-style: none;
}

.advanced summary::marker {
  display: none;
}

.advanced summary::-webkit-details-marker {
  display: none;
}

.advanced summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform var(--transition-fast);
  font-size: 0.75rem;
}

.advanced[open] summary::before {
  transform: rotate(90deg);
}

.advanced-content {
  margin-top: 8px;
  border-top: 1px solid rgba(51, 65, 85, 0.9);
  padding-top: 8px;
}

.help {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

/* Messages & errors */
.error-msg {
  font-size: 0.8rem;
  color: var(--error);
}

.status-msg {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* Form actions */
.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

/* Result card */
.hidden {
  display: none;
}

.result-card {
  border-left: 3px solid rgba(34, 197, 94, 0.7);
}

.endpoint-url {
  display: flex;
  gap: 8px;
  align-items: center;
}

.endpoint-url input {
  flex: 1;
  font-size: 0.88rem;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 12px;
  font-size: 0.8rem;
}

.result-meta span {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(51, 65, 85, 0.9);
  color: var(--text-muted);
}

/* Code blocks */
.code-block-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

@media (min-width: 768px) {
  .code-block-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.code-block {
  background: #020617;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(30, 64, 175, 0.4);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.9);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: linear-gradient(120deg, rgba(30, 64, 175, 0.9), rgba(15, 23, 42, 0.9));
  font-size: 0.8rem;
  color: #e5e7eb;
}

pre {
  margin: 0;
  padding: 8px 10px 10px;
  overflow-x: auto;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.8rem;
  color: #e5e7eb;
}

/* Footer */
.footer {
  margin-top: auto;
  text-align: center;
  padding-top: 8px;
  font-size: 0.75rem;
  color: var(--text-subtle);
}