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

:root {
  --bg:           #0f172a;
  --surface:      #1e293b;
  --surface-2:    #263348;
  --sidebar-bg:   #0d1425;
  --sidebar-text: #94a3b8;
  --sidebar-active: #f8fafc;
  --sidebar-active-bg: #3b82f6;
  --primary:      #3b82f6;
  --primary-hover:#2563eb;
  --danger:       #ef4444;
  --danger-hover: #dc2626;
  --success:      #22c55e;
  --warning:      #f59e0b;
  --text:         #f8fafc;
  --text-muted:   #cbd5e1;
  --border:       #334155;
  --radius:       8px;
  --shadow:       0 1px 3px rgba(0,0,0,.4);
}

body { font-family: system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* ── Login overlay ── */
.login-overlay {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center; z-index: 200;
}
.login-overlay.hidden { display: none; }
.login-box {
  background: var(--surface); border-radius: var(--radius);
  padding: 36px 32px; width: 360px; max-width: 95vw;
  box-shadow: 0 8px 40px rgba(0,0,0,.5); border: 1px solid var(--border);
}
.login-logo { font-size: 20px; font-weight: 700; color: var(--primary); text-align: center; margin-bottom: 12px; }

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

.sidebar {
  width: 220px; min-height: 100vh; background: var(--sidebar-bg);
  display: flex; flex-direction: column; flex-shrink: 0;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  border-right: 1px solid var(--border);
}
.sidebar-footer { margin-top: auto; padding: 12px 10px 20px; }
.btn-logout {
  width: 100%; background: none; border: 1px solid rgba(255,255,255,.1); border-radius: 6px;
  color: var(--sidebar-text); padding: 8px 14px; font-size: 13px; cursor: pointer; text-align: left; transition: all .15s;
}
.btn-logout:hover { background: rgba(255,255,255,.07); color: #fff; border-color: rgba(255,255,255,.2); }
.logo { padding: 24px 20px 20px; font-size: 16px; font-weight: 700; color: #fff; letter-spacing: .3px; }

nav { display: flex; flex-direction: column; gap: 2px; padding: 0 10px; }
.nav-item {
  background: none; border: none; cursor: pointer; text-align: left;
  color: var(--sidebar-text); padding: 10px 14px; border-radius: 6px;
  font-size: 14px; transition: all .15s;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active { background: var(--sidebar-active-bg); color: var(--sidebar-active); font-weight: 600; }

.main { flex: 1; padding: 32px; overflow-x: hidden; }

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

/* ── Page header ── */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
h1 { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 20px; }
.page-header h1 { margin-bottom: 0; }

.header-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ── Stats ── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px; margin-bottom: 28px;
}
.stats-small .stat-card { padding: 14px 16px; }
.stat-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stats-small .stat-value { font-size: 22px; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 6px; border: none;
  font-size: 14px; font-weight: 500; cursor: pointer; transition: background .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #2d3f56; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 5px 8px; background: none; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; font-size: 13px; color: var(--text); }
.btn-icon:hover { background: var(--surface-2); }

/* ── Tables ── */
.table-wrap { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); overflow: auto; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 16px; text-align: left; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.03); }
.empty { text-align: center; color: var(--text-muted); padding: 40px !important; }
td .actions { display: flex; gap: 6px; }

/* ── Status badges ── */
.badge {
  display: inline-block; padding: 3px 9px; border-radius: 20px;
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .4px;
}
.badge-active, .badge-sent    { background: rgba(34,197,94,.15);  color: #4ade80; }
.badge-unsubscribed, .badge-failed { background: rgba(239,68,68,.15); color: #f87171; }
.badge-pending  { background: rgba(245,158,11,.15); color: #fbbf24; }
.badge-sending  { background: rgba(59,130,246,.15); color: #60a5fa; }
.badge-info     { background: rgba(99,102,241,.15); color: #a5b4fc; }

/* ── Filters ── */
.filter-bar { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.filter-btn {
  padding: 6px 14px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text-muted); font-size: 13px; cursor: pointer; transition: all .15s;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ── Pagination ── */
.pagination { display: flex; gap: 6px; margin-top: 16px; align-items: center; flex-wrap: wrap; }
.pagination button {
  padding: 5px 11px; border-radius: 5px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); cursor: pointer; font-size: 13px;
}
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:hover:not(.active) { border-color: var(--primary); color: var(--primary); }
.pagination span { color: var(--text-muted); font-size: 13px; }

/* ── Form / Select ── */
.select-sm {
  padding: 7px 10px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 13px; cursor: pointer;
}
.select-sm:focus { outline: none; border-color: var(--primary); }
input[type=text], input[type=email], input[type=url], input[type=number], input[type=password], textarea {
  padding: 8px 12px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text);
  font-size: 14px; font-family: inherit; width: 100%;
}
input:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
textarea { min-height: 180px; resize: vertical; font-family: monospace; font-size: 13px; }
label { display: block; font-size: 13px; font-weight: 500; color: var(--text-muted); margin-bottom: 5px; }
.form-group { margin-bottom: 16px; }
input[type=checkbox] { accent-color: var(--primary); }

/* ── Toggle ── */
.toggle { position: relative; display: inline-block; width: 38px; height: 22px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; cursor: pointer; inset: 0;
  background: var(--border); border-radius: 22px; transition: .2s;
}
.toggle-slider:before {
  content: ''; position: absolute; width: 16px; height: 16px;
  left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .2s;
}
.toggle input:checked + .toggle-slider { background: var(--primary); }
.toggle input:checked + .toggle-slider:before { transform: translateX(16px); }

/* ── Settings ── */
.settings-section { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 24px; overflow: hidden; border: 1px solid var(--border); }
.settings-section-title { padding: 14px 20px; font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); background: var(--surface-2); border-bottom: 1px solid var(--border); }
.settings-row { display: flex; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--border); gap: 16px; }
.settings-row:last-child { border-bottom: none; }
.settings-label { flex: 0 0 220px; font-size: 14px; font-weight: 500; }
.settings-value { flex: 1; }
.settings-value input { max-width: 320px; }
.settings-save { flex: 0 0 auto; }

/* ── Templates ── */
.template-card {
  background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow);
  margin-bottom: 12px; padding: 18px 20px;
  display: flex; align-items: center; gap: 16px; border: 1px solid var(--border);
}
.template-subject { flex: 1; font-weight: 600; font-size: 15px; }
.template-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.template-actions { display: flex; gap: 8px; align-items: center; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.65);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--surface); border-radius: var(--radius);
  width: 600px; max-width: 95vw; max-height: 90vh;
  display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.6);
  border: 1px solid var(--border);
}
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px 16px; border-bottom: 1px solid var(--border); }
.modal-header h2 { font-size: 18px; }
.modal-close { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text-muted); padding: 4px; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-body { flex: 1; overflow-y: auto; padding: 20px 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ── Alert ── */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: rgba(34,197,94,.12);  color: #4ade80; border: 1px solid rgba(34,197,94,.25); }
.alert-error   { background: rgba(239,68,68,.12);  color: #f87171; border: 1px solid rgba(239,68,68,.25); }

/* ── Preview pane in template modal ── */
.preview-pane { border: 1px solid var(--border); border-radius: 6px; padding: 12px; min-height: 120px; background: var(--surface-2); font-size: 13px; overflow: auto; color: var(--text); }

/* ── Template tags legend ── */
.template-tags-legend { background: rgba(59,130,246,.08); border: 1px solid rgba(59,130,246,.2); border-radius: 6px; padding: 10px 14px; margin-bottom: 12px; }
.tags-legend-title { font-size: 11px; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px; }
.tags-legend-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; }
.tag-item { display: flex; align-items: baseline; gap: 6px; font-size: 12px; }
.tag-item code { background: rgba(59,130,246,.15); color: #93c5fd; border-radius: 4px; padding: 1px 5px; font-size: 11px; white-space: nowrap; flex-shrink: 0; }
.tag-item span { color: var(--text-muted); }

/* ── Inline edit in table ── */
.editable-input { padding: 5px 8px; border-radius: 5px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-size: 13px; width: 100%; max-width: 200px; }

/* ── Code ── */
code { background: rgba(255,255,255,.06); color: #93c5fd; border-radius: 4px; padding: 1px 5px; font-size: 12px; font-family: monospace; }