:root {
  --green: #25D366;
  --green-dark: #128C7E;
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --text: #222;
  --muted: #6b7280;
  --border: #e2e5e9;
  --danger: #dc3545;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); }

.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card {
  background: var(--card-bg); padding: 32px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,.08);
  width: 320px; display: flex; flex-direction: column; gap: 8px;
}
.login-card h1 { margin: 0; color: var(--green-dark); }
.login-card label { font-size: 13px; margin-top: 8px; color: var(--muted); }
.login-card input { padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.login-card button { margin-top: 16px; padding: 10px; border: none; border-radius: 6px; background: var(--green); color: white; font-weight: 600; cursor: pointer; }
.login-card button:hover { background: var(--green-dark); }
.muted { color: var(--muted); font-size: 13px; }
.error-text { color: var(--danger); font-size: 13px; min-height: 18px; }
.captcha-row { display: flex; align-items: center; gap: 8px; }
.captcha-image { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; line-height: 0; }
.captcha-image svg { display: block; width: 160px; height: 60px; }
.captcha-row .btn { padding: 8px 12px; font-size: 16px; line-height: 1; }

.topbar { display: flex; justify-content: space-between; align-items: center; background: var(--green-dark); color: white; padding: 14px 24px; }
.topbar .brand { font-weight: 700; font-size: 18px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-right .muted { color: #d7f2ec; }

.tabs { display: flex; gap: 4px; padding: 12px 24px 0; background: var(--bg); }
.tab-btn { padding: 10px 18px; border: none; background: transparent; cursor: pointer; font-weight: 600; color: var(--muted); border-bottom: 3px solid transparent; }
.tab-btn.active { color: var(--green-dark); border-bottom-color: var(--green); }

main { padding: 24px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 12px; }
.new-session-form { display: flex; gap: 8px; }
.new-session-form input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }

.btn { padding: 8px 16px; border-radius: 6px; border: none; cursor: pointer; font-weight: 600; }
.btn-primary { background: var(--green); color: white; }
.btn-primary:hover { background: var(--green-dark); }
.btn-secondary { background: #edf0f2; color: var(--text); }
.btn-secondary:hover { background: #dde2e6; }
.btn-danger { background: var(--danger); color: white; }

.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.session-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.session-card h3 { margin: 0 0 8px; font-size: 15px; word-break: break-all; }
.status-badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.status-connected { background: #e3f8ec; color: #1a7f4f; }
.status-qr_pending, .status-starting { background: #fff4de; color: #966107; }
.status-disconnected, .status-not_connected { background: #f1f2f4; color: var(--muted); }
.status-error { background: #fde3e3; color: var(--danger); }
.session-card img.qr { width: 100%; margin-top: 10px; border: 1px solid var(--border); border-radius: 6px; }
.session-card .actions { display: flex; gap: 8px; margin-top: 12px; }

.warning-box { background: #fff4de; border: 1px solid #f0c36d; border-radius: 8px; padding: 12px 16px; margin-bottom: 20px; font-size: 14px; }

.blast-form { background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 20px; display: flex; flex-direction: column; gap: 6px; max-width: 560px; }
.blast-form label { font-size: 13px; color: var(--muted); margin-top: 10px; }
.blast-form textarea, .blast-form input, .blast-form select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-family: inherit; font-size: 14px; }
.blast-form button { margin-top: 16px; align-self: flex-start; }

.blast-progress { background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin: 16px 0; max-width: 560px; }
.progress-bar-outer { background: #eee; border-radius: 999px; height: 10px; overflow: hidden; }
.progress-bar-inner { background: var(--green); height: 100%; width: 0%; transition: width .3s; }
.blast-log { max-height: 160px; overflow-y: auto; font-size: 12px; margin-top: 10px; font-family: monospace; }
.blast-log .log-sent { color: #1a7f4f; }
.blast-log .log-failed { color: var(--danger); }

.jobs-table { width: 100%; border-collapse: collapse; margin-top: 8px; background: var(--card-bg); }
.jobs-table th, .jobs-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }

.history-filters { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.history-filters select, .history-filters input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }
.history-pagination { display: flex; align-items: center; gap: 12px; margin-top: 12px; }