:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.15);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --border-color: #334155;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Navigation */
.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  background: linear-gradient(135deg, var(--accent-color), #8b5cf6);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-pro {
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
  color: white;
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

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

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-tertiary);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.btn-icon {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: var(--accent-light);
  color: var(--accent-color);
}

[data-theme="light"] .moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }

/* Main Content */
.main-content {
  max-width: 1100px;
  width: 100%;
  margin: 1.5rem auto;
  padding: 0 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Ad Placements */
.ad-container {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 0.5rem;
  text-align: center;
  overflow: hidden;
}

.ad-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.ad-content-placeholder {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: var(--bg-primary);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

/* Generator Card */
.generator-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--card-shadow);
}

.card-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.card-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.email-input-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.email-display-box {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  border: 2px solid var(--accent-color);
  border-radius: 10px;
  padding: 0.5rem 1rem;
  box-shadow: 0 0 0 4px var(--accent-light);
}

.email-display-box .mail-icon {
  color: var(--accent-color);
  margin-right: 0.75rem;
}

.email-display-box input {
  width: 100%;
  background: transparent;
  border: none;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  outline: none;
}

.copy-badge {
  position: absolute;
  right: 1rem;
  background: var(--success);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  opacity: 0;
  transform: translateY(5px);
  transition: all 0.2s ease;
  pointer-events: none;
}

.copy-badge.show {
  opacity: 1;
  transform: translateY(0);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--border-color);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
  background: var(--danger);
  color: white;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.inbox-meta-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.meta-label {
  color: var(--text-muted);
}

.meta-value {
  font-weight: 600;
  color: var(--text-primary);
}

.meta-value.status-active {
  color: var(--success);
}

/* Inbox Card */
.inbox-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.inbox-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.inbox-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.count-badge {
  background: var(--accent-color);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 20px;
}

.live-listening {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.radar-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
  animation: pulse-accent 1.5s infinite;
}

@keyframes pulse-accent {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(99, 102, 241, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

/* Empty State */
.empty-state {
  padding: 4rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.empty-radar-animation {
  position: relative;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.radar-center {
  width: 50px;
  height: 50px;
  background: var(--accent-light);
  color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.radar-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--accent-color);
  opacity: 0;
  animation: ripple 3s cubic-bezier(0.1, 0.2, 0.3, 1) infinite;
}

.radar-ring.r1 { animation-delay: 0s; }
.radar-ring.r2 { animation-delay: 1.5s; }

@keyframes ripple {
  0% { width: 40px; height: 40px; opacity: 0.8; }
  100% { width: 120px; height: 120px; opacity: 0; }
}

.empty-state h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 480px;
}

/* Messages List */
.messages-list {
  display: flex;
  flex-direction: column;
}

.message-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.message-item:hover {
  background-color: var(--bg-tertiary);
}

.message-item.unread {
  background-color: var(--accent-light);
}

.msg-main {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.msg-header-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.msg-sender {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.msg-subject {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.msg-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 600px;
}

.msg-otp-tag {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.msg-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: 1rem;
}

/* Modal / Email Viewer */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.email-details-bar {
  padding: 0.85rem 1.5rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.85rem;
}

.detail-row {
  display: flex;
  gap: 0.4rem;
}

.detail-label {
  color: var(--text-muted);
}

.detail-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* OTP & Link Highlights */
.otp-highlight-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.08));
  border-bottom: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.otp-highlight-banner.hidden { display: none; }

.otp-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.otp-badge-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--warning);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.otp-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fbbf24;
  letter-spacing: 0.1em;
}

.link-highlight-banner {
  background: var(--accent-light);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
}

.link-highlight-banner.hidden { display: none; }

/* Tabs */
.viewer-tabs {
  display: flex;
  background: var(--bg-tertiary);
  padding: 0.25rem 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  background: var(--bg-secondary);
}

.viewer-body {
  flex: 1;
  min-height: 380px;
  overflow-y: auto;
  padding: 1.5rem;
}

.tab-content {
  display: none;
  height: 100%;
}

.tab-content.active {
  display: block;
}

#emailFrame {
  width: 100%;
  height: 400px;
  border: none;
  background: white;
  border-radius: 8px;
}

#emailTextBody, #emailRawHeaders {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-primary);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

/* API Cards */
.api-doc-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
}

.section-title h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.section-title p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.api-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.api-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.api-card-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.api-card-badge.post { background: #0284c7; color: white; }
.api-card-badge.get { background: #16a34a; color: white; }

.api-card code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-color);
  margin-bottom: 0.4rem;
}

.api-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* FAQ */
.faq-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
}

.faq-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
}

.faq-item summary {
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--text-primary);
}

.faq-item p {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-left {
  display: flex;
  flex-direction: column;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

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

.hidden { display: none !important; }

/* Mobile */
@media (max-width: 768px) {
  .generator-card { padding: 1.25rem; }
  .button-group { flex-direction: column; }
  .btn { width: 100%; }
  .inbox-meta-bar { flex-direction: column; gap: 0.5rem; }
  .message-item { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .msg-time { margin-left: 0; }
  .modal-card { max-height: 95vh; }
}