/* ─── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w: 240px;
  --sidebar-bg: #0f172a;
  --sidebar-border: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active-bg: #1e293b;
  --sidebar-active-text: #f1f5f9;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: #ede9fe;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --success-bg: #d1fae5;
  --error: #ef4444;
  --error-bg: #fee2e2;
  --warning: #f59e0b;
  --warning-bg: #fef3c7;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
}

html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 14px; color: var(--text); background: var(--bg); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Login page ───────────────────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
}

.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo .brand { font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: -.4px; }
.login-logo .sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; letter-spacing: 1px; text-transform: uppercase; }

.login-card h2 { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.login-card p.hint { color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }

/* ─── Forms ─────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--card);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-group textarea { resize: vertical; min-height: 120px; }

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

/* ─── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all .15s;
  outline: none;
  white-space: nowrap;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-secondary { background: var(--card); color: var(--text); border-color: var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--bg); }
.btn-danger { background: var(--card); color: var(--error); border-color: #fca5a5; }
.btn-danger:hover:not(:disabled) { background: var(--error-bg); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover:not(:disabled) { background: #059669; }
.btn-full { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ─── Dashboard layout ───────────────────────────────────────────────────────── */
.dashboard {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--sidebar-border);
}

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--sidebar-border);
}
.sidebar-header .brand { font-size: 16px; font-weight: 700; color: #f1f5f9; letter-spacing: -.3px; }
.sidebar-header .sub { font-size: 10px; color: var(--sidebar-text); letter-spacing: 1.2px; text-transform: uppercase; margin-top: 3px; }

.sidebar-nav { padding: 16px 12px; flex: 1; }
.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #475569;
  padding: 12px 8px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--sidebar-text);
  cursor: pointer;
  transition: all .15s;
  font-size: 13.5px;
  font-weight: 500;
  margin-bottom: 2px;
  user-select: none;
}
.nav-item:hover { background: var(--sidebar-active-bg); color: #cbd5e1; }
.nav-item.active { background: var(--sidebar-active-bg); color: var(--sidebar-active-text); }
.nav-item.active .nav-dot { background: var(--accent); }
.nav-dot { width: 6px; height: 6px; border-radius: 50%; background: #334155; flex-shrink: 0; }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--sidebar-border);
}
.sidebar-user { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 8px; }
.sidebar-user .avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; flex-shrink: 0;
}
.sidebar-user .info { flex: 1; min-width: 0; }
.sidebar-user .name { font-size: 12px; font-weight: 500; color: #cbd5e1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-user .role { font-size: 10px; color: #475569; }
.logout-btn { background: none; border: none; color: #475569; cursor: pointer; padding: 4px; border-radius: 6px; font-size: 16px; transition: color .15s; }
.logout-btn:hover { color: var(--error); }

/* Main content */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  padding: 16px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.topbar h1 { font-size: 18px; font-weight: 600; }
.topbar .subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.content { flex: 1; overflow-y: auto; padding: 28px; }

/* Tab panels */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ─── Cards ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-body { padding: 22px; }

/* ─── Alerts ─────────────────────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}
.alert-success { background: var(--success-bg); color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: var(--error-bg); color: #991b1b; border: 1px solid #fca5a5; }
.alert-warning { background: var(--warning-bg); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ─── Template list ──────────────────────────────────────────────────────────── */
.template-grid { display: grid; gap: 14px; }
.template-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}
.template-card:hover { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,.08); }
.template-card.selected { border-color: var(--accent); background: #fafafe; }
.template-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--accent-light);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.template-info { flex: 1; min-width: 0; }
.template-name { font-weight: 600; font-size: 14px; }
.template-subject { font-size: 12px; color: var(--text-muted); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.template-actions { display: flex; gap: 8px; }

/* ─── Template editor ────────────────────────────────────────────────────────── */
.editor-layout { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
.var-panel { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.var-panel h4 { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .8px; color: var(--text-muted); margin-bottom: 12px; }
.var-chip {
  display: inline-flex;
  align-items: center;
  background: #ede9fe;
  color: #5b21b6;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  cursor: pointer;
  margin: 3px;
  transition: background .12s;
  user-select: none;
}
.var-chip:hover { background: #ddd6fe; }

/* ─── Import section ─────────────────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all .15s;
  background: var(--bg);
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: #fafafe;
}
.drop-icon { font-size: 40px; margin-bottom: 12px; }
.drop-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.drop-hint { font-size: 13px; color: var(--text-muted); }
.drop-hint span { color: var(--accent); font-weight: 500; cursor: pointer; }

.data-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
table th { background: var(--bg); padding: 10px 14px; text-align: left; font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .6px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table td { padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
table tr:last-child td { border-bottom: none; }
table tr:hover td { background: #fafafa; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge-success { background: var(--success-bg); color: #065f46; }
.badge-error { background: var(--error-bg); color: #991b1b; }
.badge-neutral { background: var(--bg); color: var(--text-muted); border: 1px solid var(--border); }
.badge-accent { background: var(--accent-light); color: #4c1d95; }

/* ─── Preview section ────────────────────────────────────────────────────────── */
.preview-controls {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.preview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.preview-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .15s;
}
.preview-card:hover { box-shadow: var(--shadow-md); }
.preview-card-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.preview-to { font-size: 12px; color: var(--text-muted); }
.preview-to strong { color: var(--text); }
.preview-subject { font-size: 13px; font-weight: 600; margin-top: 4px; }
.preview-body-wrap { padding: 14px 16px; max-height: 200px; overflow: hidden; position: relative; }
.preview-body-wrap::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 40px;
  background: linear-gradient(transparent, white);
}
.preview-body { font-size: 12px; color: var(--text); line-height: 1.6; }
.preview-card-footer { padding: 10px 16px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; }

/* Full preview modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--card);
  border-radius: 14px;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 80px rgba(0,0,0,.25);
}
.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-muted); padding: 4px 8px; border-radius: 6px; }
.modal-close:hover { background: var(--bg); color: var(--text); }
.modal-body { padding: 22px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 16px 22px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; }

.email-preview-frame {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  font-family: Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 200px;
  background: #fff;
}
.email-meta { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.email-meta div { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.email-meta div strong { color: var(--text); font-weight: 500; }

/* ─── Progress ───────────────────────────────────────────────────────────────── */
.progress-bar-wrap { background: var(--bg); border-radius: 8px; height: 10px; overflow: hidden; margin: 12px 0; }
.progress-bar { height: 100%; background: var(--accent); border-radius: 8px; transition: width .3s; }
.progress-stats { display: flex; gap: 20px; font-size: 13px; }
.progress-stats .stat { display: flex; flex-direction: column; align-items: center; }
.progress-stats .stat-val { font-size: 22px; font-weight: 700; }
.progress-stats .stat-label { color: var(--text-muted); font-size: 11px; }

/* ─── Misc ───────────────────────────────────────────────────────────────────── */
.section-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.section-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 22px; }
.divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.text-muted { color: var(--text-muted); font-size: 13px; }
.text-sm { font-size: 12px; }
.font-mono { font-family: 'SF Mono', 'Fira Code', monospace; }
.hidden { display: none !important; }

.steps {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
}
.step {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
}
.step:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.step:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.step + .step { border-left: none; }
.step.active { background: var(--accent-light); border-color: var(--accent); color: var(--accent); z-index: 1; }
.step.done { background: var(--success-bg); border-color: #a7f3d0; color: #065f46; }
.step-num { width: 24px; height: 24px; border-radius: 50%; background: var(--bg); border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; flex-shrink: 0; }
.step.active .step-num { background: var(--accent); border-color: var(--accent); color: #fff; }
.step.done .step-num { background: var(--success); border-color: var(--success); color: #fff; }

.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state .icon { font-size: 48px; margin-bottom: 12px; opacity: .5; }
.empty-state h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; }

.toggle-group { display: flex; border: 1.5px solid var(--border); border-radius: 8px; overflow: hidden; width: fit-content; }
.toggle-option { padding: 8px 16px; font-size: 13px; font-weight: 500; cursor: pointer; background: var(--card); color: var(--text-muted); border: none; font-family: inherit; transition: all .15s; }
.toggle-option.active { background: var(--accent); color: #fff; }

@keyframes spin { to { transform: rotate(360deg); } }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.3); border-top-color: #fff; border-radius: 50%; animation: spin .6s linear infinite; }