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

:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface2: #232733;
    --border: #2d3141;
    --text: #e1e4ed;
    --text2: #8b8fa3;
    --primary: #6366f1;
    --primary-hover: #5558e6;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 8px;
}

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

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 220px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar h1 {
    font-size: 18px;
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border);
    color: var(--primary);
}

.sidebar nav {
    padding: 10px 0;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text2);
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s;
}

.sidebar nav a:hover {
    background: var(--surface2);
    color: var(--text);
}

.sidebar nav a.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    border-right: 2px solid var(--primary);
}

/* Main content */
.main {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 22px;
    font-weight: 600;
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-card .label {
    font-size: 12px;
    color: var(--text2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { opacity: 0.9; }
.btn-warning { background: var(--warning); color: black; }
.btn-ghost {
    background: transparent;
    color: var(--text2);
    border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

th {
    color: var(--text2);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text2);
    margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 8px 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border 0.15s;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--primary);
}

textarea { resize: vertical; min-height: 80px; }

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal h3 {
    margin-bottom: 16px;
    font-size: 16px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Progress bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--surface2);
    border-radius: 4px;
    overflow: hidden;
    margin: 12px 0;
}

.progress-bar .fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s;
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.badge-active, .badge-sent { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-paused, .badge-failed { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-pending { background: rgba(245,158,11,0.15); color: var(--warning); }

/* Send panel */
.send-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.send-log {
    max-height: 300px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 12px;
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius);
    margin-top: 12px;
}

.send-log .log-entry {
    padding: 3px 0;
    border-bottom: 1px solid var(--border);
}

.send-log .log-success { color: var(--success); }
.send-log .log-error { color: var(--danger); }
.send-log .log-info { color: var(--text2); }

/* Utility */
.flex { display: flex; }
.gap-10 { gap: 10px; }
.gap-16 { gap: 16px; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.text-muted { color: var(--text2); }
.text-sm { font-size: 13px; }
.text-center { text-align: center; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }