:root {
    --bg: #f4f5f7;
    --panel: #ffffff;
    --border: #e3e5e9;
    --text: #1f2430;
    --muted: #6b7280;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --danger: #dc2626;
    --success: #16a34a;
    --sidebar-bg: #171923;
    --sidebar-text: #cbd5e1;
    --radius: 10px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 220px; flex-shrink: 0; background: var(--sidebar-bg); color: var(--sidebar-text);
    display: flex; flex-direction: column; padding: 20px 0;
}
.sidebar-brand { font-weight: 700; font-size: 18px; color: #fff; padding: 0 20px 20px; }
.sidebar nav { display: flex; flex-direction: column; flex: 1; }
.sidebar nav a {
    color: var(--sidebar-text); padding: 12px 20px; font-size: 14px; text-decoration: none;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); }
.sidebar nav a.active { color: #fff; border-left-color: var(--primary); background: rgba(79,70,229,0.15); }
.sidebar-footer { padding: 16px 20px 0; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; display: flex; flex-direction: column; gap: 6px; }
.sidebar-footer a { color: #f87171; }

.content { flex: 1; padding: 32px 40px; max-width: 1100px; }
h1 { margin-top: 0; font-size: 24px; }
h2 { font-size: 16px; margin: 0; }
.muted { color: var(--muted); font-size: 13px; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; }
.stat-num { display: block; font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--muted); }

.btn { display: inline-block; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--border); background: #fff; color: var(--text); cursor: pointer; font-size: 14px; }
.btn:hover { background: #f0f0f2; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-small { padding: 5px 10px; font-size: 12px; }

.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.detail-table th { text-align: left; padding: 6px 12px 6px 0; color: var(--muted); font-size: 13px; width: 140px; vertical-align: top; }
.detail-table td { padding: 6px 0; font-size: 14px; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; text-transform: capitalize; }
.badge-draft { background: #e5e7eb; color: #374151; }
.badge-sending { background: #fef3c7; color: #92400e; }
.badge-paused { background: #fee2e2; color: #991b1b; }
.badge-completed { background: #d1fae5; color: #065f46; }
.badge-active { background: #d1fae5; color: #065f46; }
.badge-unsubscribed { background: #e5e7eb; color: #6b7280; }
.badge-bounced { background: #fee2e2; color: #991b1b; }

label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; margin-top: 12px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=file], select, textarea {
    width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
textarea { resize: vertical; }

.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-col { flex: 1; min-width: 200px; }
.form-col-full { flex: 1 1 100%; }
.form-actions { margin-top: 20px; display: flex; gap: 10px; }
.inline-form { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.inline-form input { width: auto; flex: 1; min-width: 200px; margin-top: 0; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab-btn { padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border); background: #f0f0f2; cursor: pointer; font-size: 13px; }
.tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.editor-toolbar-row { display: flex; justify-content: space-between; align-items: center; }
#quillEditor { background: #fff; min-height: 300px; }

.progress-bar { background: #e5e7eb; border-radius: 999px; height: 14px; overflow: hidden; }
.progress-fill { background: var(--primary); height: 100%; transition: width 0.3s ease; }

.pagination { margin-top: 16px; display: flex; gap: 6px; flex-wrap: wrap; }
.pagination a { padding: 6px 11px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.pagination a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg); }
.auth-box { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; width: 360px; }
.auth-box h1 { font-size: 20px; margin-bottom: 4px; }
.auth-box h2 { font-size: 15px; color: var(--muted); font-weight: 500; margin-bottom: 16px; }
.auth-box button { width: 100%; margin-top: 18px; }

code { background: #f0f0f2; padding: 1px 5px; border-radius: 4px; font-size: 12px; }