/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Layout ===== */
.app-header {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border-bottom: 1px solid #334155;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.app-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f1f5f9;
}
.app-header .badge {
  background: #3b82f6;
  color: #fff;
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-weight: 600;
}
.app-header .version {
  color: #94a3b8;
  font-size: 0.85rem;
  margin-left: auto;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #334155;
}
.tab-btn {
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border: none;
  background: transparent;
  color: #94a3b8;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}
.tab-btn:hover {
  color: #e2e8f0;
}
.tab-btn.active {
  color: #60a5fa;
  border-bottom-color: #60a5fa;
}
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
}

/* ===== Form ===== */
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}
input[type="text"],
input[type="url"],
input#uri,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #334155;
  border-radius: 0.375rem;
  background: #1e293b;
  color: #e2e8f0;
  font-size: 0.9rem;
  font-family: "SF Mono", "Fira Code", monospace;
  transition: border-color 0.2s;
}
input:focus,
textarea:focus {
  outline: none;
  border-color: #60a5fa;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
}
input#uri {
  margin-top: 0.5rem;
}
textarea {
  resize: vertical;
  min-height: 200px;
}
input::placeholder,
textarea::placeholder {
  color: #475569;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-primary {
  background: #3b82f6;
  color: #fff;
}
.btn-primary:hover {
  background: #2563eb;
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== Status Bar ===== */
.status-bar {
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  display: none;
  font-size: 0.9rem;
}
.status-bar.show {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.status-bar.success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid #22c55e;
  color: #86efac;
}
.status-bar.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid #ef4444;
  color: #fca5a5;
}
.status-bar.info {
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid #60a5fa;
  color: #93c5fd;
}
.status-bar.loading {
  background: rgba(234, 179, 8, 0.1);
  border: 1px solid #eab308;
  color: #fde047;
}

/* ===== Placeholders & Samples ===== */
.samples {
  margin-bottom: 1.5rem;
}
.samples label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 0.4rem;
}
.sample-btns {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.sample-btn {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  border: 1px solid #334155;
  border-radius: 0.375rem;
  background: transparent;
  color: #94a3b8;
  cursor: pointer;
  transition: all 0.15s;
}
.sample-btn:hover {
  border-color: #60a5fa;
  color: #60a5fa;
}
#empty-placeholder {
  text-align: center;
  padding: 3rem 1rem;
  color: #475569;
}
#empty-placeholder .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}
#empty-placeholder h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #64748b;
}
#empty-placeholder p {
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  .form-row {
    flex-direction: column;
  }
  .app-header {
    padding: 1rem;
  }
  .app-header h1 {
    font-size: 1.2rem;
  }
}

/* ================================================================
   COLLAPSIBLE JSON TREE STYLES
   ================================================================ */

#results {
  margin-top: 1.5rem;
}
.j-root {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  overflow: hidden;
  font-family: "SF Mono", "Fira Code", Consolas, monospace;
  font-size: 0.82rem;
}
.j-section {
  border-bottom: 1px solid #1e293b;
}
.j-section:last-child {
  border-bottom: none;
}

.j-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
  font-weight: 600;
  color: #e2e8f0;
}
.j-toggle:hover {
  background: #273348;
}
.j-toggle .j-arr {
  font-size: 0.6rem;
  transition: transform 0.2s;
  color: #64748b;
  width: 0.8rem;
  flex-shrink: 0;
  text-align: center;
}
.j-toggle .j-arr.open {
  transform: rotate(90deg);
}
.j-toggle .j-key {
  color: #93c5fd;
}
.j-toggle .j-count {
  color: #64748b;
  font-weight: 400;
  font-size: 0.75rem;
  margin-left: 0.3rem;
}
.j-toggle .j-type {
  color: #22c55e;
  font-weight: 400;
  font-size: 0.7rem;
  margin-left: auto;
  padding: 0.1rem 0.5rem;
  background: #064e3b;
  border-radius: 9999px;
}
.j-toggle .j-type-master {
  color: #fbbf24;
  background: #78350f;
}

.j-body {
  display: none;
}
.j-body.open {
  display: block;
  padding: 0.3rem 1rem 0.6rem 2.2rem;
}

.j-kv {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.15rem 0;
  line-height: 1.5;
}
.j-kv .j-key {
  color: #94a3b8;
  min-width: 10rem;
  flex-shrink: 0;
}
.j-kv .j-val {
  word-break: break-all;
  font-weight: 500;
}
.j-number {
  color: #fb923c;
}
.j-string {
  color: #34d399;
}
.j-bool {
  color: #a78bfa;
}
.j-null {
  color: #f87171;
  font-style: italic;
}
.j-uri {
  color: #60a5fa;
  word-break: break-all;
}

.j-table-wrap {
  overflow-x: auto;
  margin-top: 0.4rem;
}
.j-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}
.j-table th,
.j-table td {
  text-align: left;
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid #1e293b;
  white-space: nowrap;
}
.j-table th {
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: #0f172a;
}
.j-table td {
  color: #cbd5e1;
}
.j-table tr:hover td {
  background: #273348;
}
.j-mono {
  font-family: "SF Mono", "Fira Code", monospace;
}
.j-uri-cell {
  color: #60a5fa;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: middle;
}

/* detail row in table */
.j-detail-row {
  display: none;
}
.j-detail-row td {
  padding: 0.5rem !important;
  white-space: normal !important;
}
.j-detail-pre {
  margin: 0;
  font-size: 0.75rem;
  background: #0f172a;
  padding: 0.5rem;
  border-radius: 0.25rem;
  overflow-x: auto;
  color: #e2e8f0;
}