:root {
    color-scheme: light dark;
    --bg: #f5f6f8;
    --panel: #ffffff;
    --text: #1c1f26;
    --muted: #667085;
    --border: #e2e5ea;
    --primary: #2563eb;
    --success: #16a34a;
    --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161b;
        --panel: #1e2129;
        --text: #e7e9ee;
        --muted: #9aa2b1;
        --border: #2b2f3a;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 0 24px 40px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logout { color: var(--muted); text-decoration: none; }

.alert {
    padding: 10px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}
.alert-success { background: rgba(22,163,74,0.15); color: var(--success); }
.alert-error { background: rgba(220,38,38,0.15); color: var(--error); }

.stats {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.stat-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 24px;
    min-width: 120px;
}
.stat-value { display: block; font-size: 28px; font-weight: 700; }
.stat-label { color: var(--muted); text-transform: capitalize; }

.panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.panel h2 { margin: 0 0 4px; font-size: 16px; }
.panel label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.panel input, .panel select, .login-box input {
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}
.panel button, .login-box button {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 600;
}

.filters { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.filters form { display: flex; gap: 8px; }
.filters input, .filters select {
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
}

.button-link {
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap;
}

.panel-danger {
    margin-top: 24px;
    border-color: var(--error);
}
.panel-danger h2 { color: var(--error); }
.panel-danger label { flex-direction: row; align-items: center; gap: 8px; font-size: 14px; color: var(--text); }
.checkbox-label { font-weight: 600; }
.button-danger {
    background: var(--error);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 600;
    align-self: flex-start;
}

.leads-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    display: block;
    overflow-x: auto;
}
.leads-table th, .leads-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    white-space: nowrap;
}
.leads-table th { color: var(--muted); font-weight: 600; }

.badge {
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    background: var(--border);
}
.badge-new { background: rgba(37,99,235,0.15); color: var(--primary); }
.badge-contacted { background: rgba(22,163,74,0.15); color: var(--success); }
.badge-invalid_phone, .badge-opted_out { background: rgba(220,38,38,0.15); color: var(--error); }

.pagination { display: flex; gap: 6px; margin-top: 16px; }
.pagination a {
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
}
.pagination a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 320px;
}
.login-box label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }