/* Aqua Modern Design System */
:root {
  --bg: #090d16;
  --surface: #0f172a;
  --surface-raised: #141e33;
  --surface-hover: #1e293b;
  --border: #1e293b;
  --border-subtle: #172033;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-active: #075985;
  --accent-focus: rgba(2, 132, 199, 0.35);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--accent);
  color: #ffffff;
  border-radius: var(--radius-md);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-host {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 28px 0 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--surface-raised);
  border-top-left-radius: var(--radius-sm);
  border-top-right-radius: var(--radius-sm);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--surface-raised);
  border-top-left-radius: var(--radius-sm);
  border-top-right-radius: var(--radius-sm);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 32px 28px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-header {
  margin-bottom: 12px;
}

.panel-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 6px 0;
  color: var(--text-primary);
  letter-spacing: -0.015em;
}

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

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

/* Editor Grid (Side-by-side text cleaner) */
.editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 860px) {
  .editor-grid {
    grid-template-columns: 1fr;
  }
}

.editor-column {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.column-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.char-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.code-textarea {
  width: 100%;
  min-height: 280px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  padding: 14px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s ease;
}

.code-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-focus);
}

.code-textarea[readonly] {
  background: #060910;
  color: #e2e8f0;
}

/* Mode Selector Card */
.mode-selector-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-top: 14px;
  margin-bottom: 14px;
}

.mode-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.mode-radios {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 600px) {
  .mode-radios {
    grid-template-columns: 1fr;
  }
}

.radio-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.radio-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.radio-card input[type="radio"] {
  accent-color: var(--accent);
  margin-top: 3px;
  cursor: pointer;
}

.radio-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.radio-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.radio-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.35;
}

.form-select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  padding: 6px 12px;
  outline: none;
  font-family: var(--font-sans);
  cursor: pointer;
  flex: 1;
}

.form-select:focus {
  border-color: var(--accent);
}

/* Options bar */
.options-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  min-height: 28px;
  margin-top: 14px;
  margin-bottom: 14px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

/* Buttons */
.action-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:active {
  background: var(--accent-active);
}

.btn-secondary {
  background: var(--surface-hover);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: #28354f;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
}

/* Diff Badge & Stats */
.diff-badge {
  display: inline-flex;
  align-items: center;
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.stats-panel {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
}

.stats-header {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.stat-item {
  background: var(--surface);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.stat-val {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.stat-name {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.details-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  background: var(--surface);
  padding: 4px 8px;
  border-radius: 4px;
}

/* File Dropzone */
.dropzone {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--surface-raised);
}

.dropzone-file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.dropzone-icon {
  color: var(--accent);
  margin-bottom: 14px;
}

.dropzone-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.dropzone-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.file-config-card {
  margin-top: 20px;
}

.file-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.file-details {
  display: flex;
  align-items: center;
  gap: 14px;
}

.file-icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--surface-hover);
  color: var(--accent);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.selected-file-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.selected-file-size {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.json-viewer {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #cbd5e1;
  overflow-x: auto;
  max-height: 400px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-info {
  background: rgba(2, 132, 199, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(2, 132, 199, 0.3);
}

.badge-muted {
  background: var(--surface-hover);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.http-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.http-badge.post {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(2, 132, 199, 0.4);
}

/* Capabilities List */
.capability-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.cap-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: var(--radius-md);
}

.cap-name {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Code Example Blocks */
.code-example {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #cbd5e1;
  overflow-x: auto;
  margin-top: 8px;
}

.api-method-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.api-path {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.api-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Login Page Styling */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 16px;
}

.login-header {
  text-align: center;
  margin-bottom: 12px;
}

.login-header .logo-icon {
  margin: 0 auto 16px auto;
  width: 48px;
  height: 48px;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 6px 0;
  color: var(--text-primary);
}

.login-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label, .form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input[type="password"],
.form-group input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-focus);
}

.alert {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.alert-danger {
  background: var(--danger-bg);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Footer */
.app-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 16px 28px;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-content a {
  color: var(--accent);
  text-decoration: none;
}

.footer-content a:hover {
  text-decoration: underline;
}

/* Alert Banners */
.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.45;
  animation: fadeIn 0.2s ease-in-out;
}

.alert-warning {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

.alert-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  color: #f87171;
  margin-bottom: 2px;
}

.alert-desc {
  color: #cbd5e1;
  font-size: 0.82rem;
}

.alert-dismiss {
  padding: 2px 8px;
  font-size: 0.85rem;
  color: #94a3b8;
  cursor: pointer;
  border-radius: 4px;
}

.alert-dismiss:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

/* Twirling Spinner Animation */
.spinner-icon {
  display: inline-block;
  width: 15px;
  height: 15px;
  border: 2.5px solid rgba(255, 255, 255, 0.25);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: twirl-spin 0.65s linear infinite;
  vertical-align: middle;
  flex-shrink: 0;
}

@keyframes twirl-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Model Guide Link */
.model-guide-link {
  font-size: 0.75rem;
  color: #38bdf8;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: color 0.15s ease;
}

.model-guide-link:hover {
  color: #7dd3fc;
  text-decoration: underline;
}