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

:root {
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --primary: #25d366;
  --primary-dark: #1da851;
  --danger: #e74c3c;
  --warning: #f39c12;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #e0e6ed;
  --success: #27ae60;
  --info: #3498db;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.nav {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 60px;
  gap: 24px;
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  text-decoration: none;
  color: var(--text);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--bg);
  color: var(--primary-dark);
}

.nav-right {
  margin-left: auto;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 14px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.card-value {
  font-size: 32px;
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #c0392b;
}

.btn-warning {
  background: var(--warning);
  color: white;
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--border);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 17px;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: white;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

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

.login-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.login-card h1 {
  font-size: 22px;
  margin-bottom: 8px;
}

.login-card p {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 24px;
}

.table-wrapper {
  overflow-x: auto;
}

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

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  font-weight: 600;
  color: var(--text-light);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:hover {
  background: var(--bg);
}

.progress-bar {
  height: 24px;
  background: var(--bg);
  border-radius: 12px;
  overflow: hidden;
  margin: 12px 0;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 12px;
  transition: width 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 600;
  min-width: 40px;
}

.alert {
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 500;
}

.alert-warning {
  background: #fef9e7;
  border: 1px solid #f9e79f;
  color: #7d6608;
}

.alert-danger {
  background: #fdedec;
  border: 1px solid #f5b7b1;
  color: #922b21;
}

.alert-success {
  background: #eafaf1;
  border: 1px solid #a9dfbf;
  color: #1e8449;
}

.alert-info {
  background: #ebf5fb;
  border: 1px solid #aed6f1;
  color: #1b4f72;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-sent { background: #eafaf1; color: var(--success); }
.badge-failed { background: #fdedec; color: var(--danger); }
.badge-pending { background: #fef9e7; color: var(--warning); }
.badge-sending { background: #ebf5fb; color: var(--info); }
.badge-paused { background: #fef9e7; color: var(--warning); }
.badge-completed { background: #eafaf1; color: var(--success); }
.badge-draft { background: var(--bg); color: var(--text-light); }
.badge-cancelled { background: #fdedec; color: var(--danger); }

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  cursor: pointer;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

.checkbox-group label:hover {
  border-color: var(--primary);
}

.checkbox-group input:checked + span {
  color: var(--primary-dark);
  font-weight: 600;
}

.image-preview {
  max-width: 300px;
  max-height: 300px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 8px;
  display: none;
}

.msg-preview {
  background: #dcf8c6;
  border-radius: 8px;
  padding: 12px;
  max-width: 350px;
  font-size: 14px;
  line-height: 1.5;
  margin-top: 12px;
  word-wrap: break-word;
}

.msg-preview img {
  max-width: 100%;
  border-radius: 6px;
  margin-bottom: 8px;
}

.live-log {
  background: #1a1a2e;
  color: #a0e4a0;
  border-radius: 8px;
  padding: 16px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  max-height: 300px;
  overflow-y: auto;
  line-height: 1.6;
}

.live-log .log-entry {
  margin-bottom: 4px;
}

.live-log .log-time {
  color: #666;
}

.live-log .log-sent {
  color: #a0e4a0;
}

.live-log .log-failed {
  color: #e74c3c;
}

.live-log .log-info {
  color: #5dade2;
}

.text-center { text-align: center; }
.text-light { color: var(--text-light); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.gap-8 { gap: 8px; }
.hidden { display: none !important; }

@media (max-width: 768px) {
  .nav { padding: 0 12px; gap: 12px; }
  .nav-links a { padding: 6px 10px; font-size: 13px; }
  .container { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

.badge-active { background: #eafaf1; color: var(--success); }
.badge-opted-out { background: #fdedec; color: var(--danger); }
.badge-skipped { background: var(--bg); color: var(--text-light); }