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

:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-2: #1a1a28;
  --border: #1e1e2e;
  --border-hover: #2a2a3e;
  --text: #e8e8ed;
  --muted: #8888a0;
  --accent: #4ade80;
  --accent-dim: #22c55e;
  --accent-bg: rgba(74, 222, 128, 0.08);
  --accent-border: rgba(74, 222, 128, 0.15);
  --amber: #fbbf24;
  --amber-bg: rgba(251, 191, 36, 0.08);
  --red: #f87171;
  --red-bg: rgba(248, 113, 113, 0.08);
  --blue: #60a5fa;
  --blue-bg: rgba(96, 165, 250, 0.08);
  --purple: #a78bfa;
  --sidebar-w: 240px;
  --radius: 10px;
  --radius-sm: 6px;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 700;
  padding: 0 24px 24px;
  letter-spacing: -0.5px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.sidebar-logo span { color: var(--accent); }

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.nav-item:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-item.active {
  color: var(--accent);
  background: var(--accent-bg);
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.user-info {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-email {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}

.logout-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
}

.logout-btn:hover { color: var(--red); background: var(--red-bg); }

/* Main content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 32px 40px;
  max-width: 1200px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

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

/* Stat cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.stat-card-label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.stat-card-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-top: 8px;
}

.stat-card-value.green { color: var(--accent); }
.stat-card-value.amber { color: var(--amber); }
.stat-card-value.red { color: var(--red); }
.stat-card-value.blue { color: var(--blue); }

.stat-card-sub {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
  border-color: var(--accent);
}

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

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

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--surface-2);
}

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}

.btn-danger:hover {
  background: var(--red-bg);
}

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 14px; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Tables */
.table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.table-header h3 {
  font-size: 15px;
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 12px 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

td {
  padding: 12px 20px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface-2); }

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-green { background: var(--accent-bg); color: var(--accent); border: 1px solid var(--accent-border); }
.badge-amber { background: var(--amber-bg); color: var(--amber); border: 1px solid rgba(251,191,36,0.15); }
.badge-red { background: var(--red-bg); color: var(--red); border: 1px solid rgba(248,113,113,0.15); }
.badge-blue { background: var(--blue-bg); color: var(--blue); border: 1px solid rgba(96,165,250,0.15); }
.badge-muted { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-hint {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.15s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent);
}

.form-textarea { min-height: 100px; resize: vertical; }
.form-select { cursor: pointer; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* Upload area */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.upload-area:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.upload-area.dragging {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.upload-area svg {
  width: 40px;
  height: 40px;
  color: var(--muted);
  margin-bottom: 12px;
}

.upload-area p {
  color: var(--muted);
  font-size: 14px;
}

.upload-area .accent { color: var(--accent); font-weight: 600; }

/* Email preview */
.email-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
}

.email-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.email-preview-to {
  font-size: 13px;
  color: var(--muted);
}

.email-preview-subject {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.email-preview-body {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  white-space: pre-wrap;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 13px;
  margin-bottom: 20px;
}

/* Auth page */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.auth-box .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}

.auth-box .logo span { color: var(--accent); }

.auth-box .subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.auth-toggle {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--muted);
}

.auth-toggle a {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}

.auth-toggle a:hover { text-decoration: underline; }

.auth-error {
  background: var(--red-bg);
  border: 1px solid rgba(248,113,113,0.15);
  color: var(--red);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}

/* Campaign detail sections */
.section {
  margin-bottom: 32px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 18px;
  font-weight: 700;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: -1px;
}

.tab {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  font-size: 13px;
  z-index: 2000;
  animation: slideUp 0.3s ease;
  max-width: 360px;
}

.toast.success { border-color: var(--accent-border); color: var(--accent); }
.toast.error { border-color: rgba(248,113,113,0.3); color: var(--red); }

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Checkbox */
.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  cursor: pointer;
  position: relative;
}

input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10px;
  color: #0a0a0f;
  font-weight: 700;
}

/* Textarea for CSV paste */
.csv-paste-area {
  font-family: 'SF Mono', 'Monaco', 'Fira Code', monospace;
  font-size: 12px;
  min-height: 200px;
}

/* Pricing Page */
.pricing-page {
  min-height: 100vh;
  padding: 48px 24px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg);
}

.pricing-header {
  text-align: center;
  margin-bottom: 48px;
  max-width: 640px;
}

.pricing-header .logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 32px;
}

.pricing-header .logo span { color: var(--accent); }

.pricing-eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 12px;
}

.pricing-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
}

.pricing-header h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1040px;
  width: 100%;
  margin-bottom: 40px;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}

.pricing-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.pricing-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(74, 222, 128, 0.04) 0%, var(--surface) 40%);
  box-shadow: 0 0 40px rgba(74, 222, 128, 0.06);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0a0a0f;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 16px;
  border-radius: 20px;
  font-family: 'Space Grotesk', sans-serif;
}

.pricing-card-header {
  margin-bottom: 20px;
}

.pricing-card-header h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.pricing-card-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.pricing-card-price {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-amount {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -2px;
  color: var(--text);
}

.price-period {
  font-size: 15px;
  color: var(--muted);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex: 1;
}

.pricing-features li {
  font-size: 14px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature-check {
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-bg);
  border-radius: 50%;
  font-size: 10px;
}

.pricing-comparison {
  text-align: center;
  margin-bottom: 32px;
}

.pricing-comparison-text {
  font-size: 14px;
  color: var(--muted);
}

.pricing-comparison-text .red { color: var(--red); font-weight: 600; }
.pricing-comparison-text .amber { color: var(--amber); font-weight: 600; }
.pricing-comparison-text .green { color: var(--accent); font-weight: 600; }

.pricing-footer-note {
  text-align: center;
}

.pricing-footer-note p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}

.pricing-skip-link {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
  transition: color 0.15s;
  font-family: 'Inter', sans-serif;
}

.pricing-skip-link:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; }
  .pricing-card.featured { order: -1; }
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    position: fixed;
    bottom: 0;
    top: auto;
    left: 0;
    right: 0;
    height: 60px;
    flex-direction: row;
    padding: 0;
    border-right: none;
    border-top: 1px solid var(--border);
  }

  .sidebar-logo, .sidebar-footer { display: none; }

  .sidebar-nav {
    flex-direction: row;
    justify-content: space-around;
    padding: 0;
    width: 100%;
  }

  .nav-item {
    flex-direction: column;
    gap: 2px;
    font-size: 10px;
    padding: 8px;
  }

  .nav-item-text { display: none; }

  .main-content {
    margin-left: 0;
    padding: 20px;
    padding-bottom: 80px;
  }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}