/* ==========================================================================
   DocStudio Developer Portal & API Token Metering Gateway
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Roboto Mono', monospace;

  --bg-dark: #07090e;
  --bg-card: rgba(18, 24, 38, 0.7);
  --bg-card-hover: rgba(26, 35, 56, 0.85);
  --border: rgba(255, 255, 255, 0.1);
  --border-focus: #3b82f6;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --primary: #3b82f6;
  --primary-glow: rgba(59, 130, 246, 0.3);
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-purple: #a855f7;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.12) 0%, transparent 45%);
  background-attachment: fixed;
}

.dev-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 1.5rem 2rem 5rem;
}

/* Header */
.dev-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.dev-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--text-main);
}

.dev-logo-badge {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.dev-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.dev-subtitle {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.back-to-launchpad-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 9999px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 600;
  transition: all 0.2s;
}

.back-to-launchpad-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--primary);
}

/* Top Token Metering Banner */
.token-banner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.token-metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.token-metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-color, var(--primary));
}

.metric-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.metric-val {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.metric-sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* Two-Column Layout */
.dev-body-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 2rem;
}

/* Left Sidebar - Key Manager & Endpoints */
.dev-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(16px);
}

.panel-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.key-display-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  word-break: break-all;
}

.copy-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
}

.copy-btn:hover {
  color: #fff;
}

.generate-key-btn {
  width: 100%;
  padding: 0.65rem;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.generate-key-btn:hover {
  background: #2563eb;
  box-shadow: 0 0 16px var(--primary-glow);
}

/* Endpoint Selector List */
.endpoint-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.endpoint-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.endpoint-btn:hover, .endpoint-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--primary);
}

.endpoint-btn.active {
  border-left: 3px solid var(--primary);
}

.method-tag {
  font-size: 0.6875rem;
  font-weight: 800;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.method-post { background: rgba(59, 130, 246, 0.2); color: var(--primary); }
.method-get { background: rgba(16, 185, 129, 0.2); color: var(--accent-emerald); }

.cost-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.15);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-family: var(--font-sans);
}

/* Right Main - Interactive Sandbox & Code Generator */
.sandbox-main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sandbox-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  backdrop-filter: blur(16px);
}

.endpoint-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.endpoint-url-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
}

.run-test-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.5rem;
  background: var(--accent-emerald);
  border: none;
  border-radius: 9999px;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.run-test-btn:hover {
  background: #059669;
  transform: translateY(-1px);
}

/* Request / Response Split */
.editor-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.editor-pane-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}

.code-textarea {
  width: 100%;
  height: 280px;
  background: #04060a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  color: #a5f3fc;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.45;
  resize: vertical;
  outline: none;
}

.code-textarea:focus {
  border-color: var(--primary);
}

.response-box {
  width: 100%;
  height: 280px;
  background: #04060a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  color: #86efac;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.45;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* SDK Code Snippets */
.code-snippets-section {
  margin-top: 1.5rem;
}

.snippet-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.snippet-tab {
  padding: 0.35rem 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.snippet-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.snippet-code-box {
  background: #04060a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: #f1f5f9;
  position: relative;
  overflow-x: auto;
}

/* Responsive */
@media (max-width: 900px) {
  .dev-body-grid {
    grid-template-columns: 1fr;
  }
  .editor-split-grid {
    grid-template-columns: 1fr;
  }
}