:root {
  --bg-dark: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #172033;
  --bg-sidebar: #0b1120;
  --border-color: #1e293b;
  --border-focus: #3b82f6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #10b981, #06b6d4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 14px var(--accent-emerald-glow);
}

.brand-text h2 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #fff;
}

.version-tag {
  font-size: 11px;
  color: var(--accent-emerald);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  width: 100%;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.05));
  color: #fff;
  border-left: 3px solid var(--accent-emerald);
}

.nav-icon {
  font-size: 16px;
}

.nav-label {
  flex: 1;
}

.badge {
  background: var(--border-color);
  color: var(--text-muted);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

/* Webhook URL Box */
.webhook-url-box {
  background: #0f172a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.url-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
  color: var(--accent-emerald);
}

.url-copy-row {
  display: flex;
  gap: 6px;
}

.url-copy-row input {
  background: #030712;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #38bdf8;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 8px;
  width: 100%;
  outline: none;
}

.url-copy-row button {
  background: var(--accent-emerald);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 0 10px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.url-copy-row button:hover {
  opacity: 0.85;
}

.url-hint {
  font-size: 11px;
  color: var(--text-subtle);
  line-height: 14px;
}

/* Engine Status Card */
.engine-status-card {
  margin-top: auto;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-indicator-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
}

.status-details {
  display: flex;
  flex-direction: column;
}

.status-details strong {
  font-size: 12px;
  color: #fff;
}

.status-details span {
  font-size: 11px;
  color: var(--text-muted);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 1400px;
}

/* Topbar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.page-title h1 {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
}

.page-title p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.stats-ribbon {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  min-width: 120px;
  display: flex;
  flex-direction: column;
}

.stat-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-subtle);
  font-weight: 700;
}

.stat-value {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-top: 2px;
}

.stat-card.success .stat-value { color: var(--accent-emerald); }
.stat-card.warning .stat-value { color: var(--accent-amber); }
.stat-card.danger .stat-value { color: var(--accent-rose); }

/* Tabs */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-glow {
  box-shadow: 0 0 25px rgba(16, 185, 129, 0.05);
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
}

.card-header p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.card-body {
  padding: 24px;
}

/* Toolbar */
.section-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  width: 320px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  color: var(--text-subtle);
}

.search-box input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px 10px 36px;
  color: #fff;
  width: 100%;
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent-emerald);
}

.toolbar-actions {
  display: flex;
  gap: 10px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 4px 12px var(--accent-emerald-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #1e293b;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #334155;
  color: #fff;
}

.btn-accent {
  background: var(--accent-blue);
  color: #fff;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 15px;
}

/* Tables */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  background: #0f172a;
  padding: 14px 16px;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
}

.data-table tr:hover td {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.received { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.status-badge.processing { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.status-badge.sent { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.status-badge.failed { background: rgba(244, 63, 94, 0.15); color: #fb7185; }

.empty-state {
  padding: 60px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.empty-icon {
  font-size: 36px;
  opacity: 0.5;
}

.empty-state h3 {
  color: #fff;
  font-size: 16px;
}

.empty-state p {
  color: var(--text-subtle);
  font-size: 13px;
  max-width: 360px;
}

/* Forms */
.grid-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.grid-form.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: #0b1120;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent-emerald);
}

.form-group small {
  font-size: 11px;
  color: var(--text-subtle);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 10px;
}

/* Tags Helper */
.tags-helper {
  margin: 14px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tags-label {
  font-size: 11px;
  color: var(--text-subtle);
  font-weight: 600;
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-chip {
  background: #1e293b;
  border: 1px solid #334155;
  color: #38bdf8;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.tag-chip:hover {
  background: var(--accent-emerald);
  color: #fff;
  border-color: var(--accent-emerald);
}

.code-editor {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 18px;
  background: #030712 !important;
  color: #a7f3d0 !important;
  resize: vertical;
}

/* Template Grid */
.template-editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.preview-col {
  display: flex;
  flex-direction: column;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-badge {
  font-size: 11px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
}

.preview-subject-bar {
  background: #0f172a;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  color: #e2e8f0;
}

.preview-frame-container {
  flex: 1;
  min-height: 500px;
  background: #000;
}

#preview-iframe {
  width: 100%;
  height: 100%;
  min-height: 500px;
  border: none;
  background: #0f172a;
}

/* Accounts List */
.inline-form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.inline-form input {
  flex: 1;
  background: #0b1120;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: #fff;
  font-size: 13px;
}

.accounts-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.account-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #0b1120;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.account-email {
  font-weight: 600;
  color: #fff;
  font-size: 13px;
}

.btn-remove-acc {
  background: transparent;
  border: none;
  color: var(--accent-rose);
  cursor: pointer;
  font-size: 14px;
}

/* Settings Grid */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.toggle-group {
  margin: 16px 0;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  color: #fff;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 20px 0;
}

.section-subtitle {
  font-size: 14px;
  color: #38bdf8;
  margin-bottom: 14px;
}

/* Terminal / Logs */
.card-terminal {
  background: #030712;
  border-color: #1e293b;
}

.terminal-header {
  background: #090d16;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #1e293b;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.terminal-title {
  font-size: 12px;
  color: var(--text-subtle);
  font-family: var(--font-mono);
}

.btn-clear-logs {
  background: transparent;
  border: 1px solid #334155;
  color: var(--text-subtle);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
}

.terminal-body {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 20px;
  color: #38bdf8;
  height: 460px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  z-index: 999;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-subtle);
  font-size: 24px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-body pre {
  background: #030712;
  padding: 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 12px;
  color: #a7f3d0;
  overflow-x: auto;
}

/* Toast */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  animation: slideIn 0.2s ease;
}

.toast.success { border-color: var(--accent-emerald); }
.toast.error { border-color: var(--accent-rose); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@media (max-width: 1024px) {
  .template-editor-grid, .settings-grid, .grid-form {
    grid-template-columns: 1fr;
  }
}