:root {
  color-scheme: light dark;
  --bg: #f2f4f7;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --text: #14161a;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --brand: #6366f1;
  --brand-dark: #4f46e5;
  --brand-tint: #eef0fe;
  --wa: #25d366;
  --wa-dark: #1da851;
  --wa-tint: #e7f9ee;
  --success: #16a34a;
  --success-tint: #ecfdf3;
  --danger: #dc2626;
  --danger-tint: #fef2f2;
  --warning: #d97706;
  --warning-tint: #fffaeb;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101114;
    --surface: #191b1f;
    --surface-2: #202226;
    --text: #f2f3f5;
    --text-muted: #9aa0aa;
    --border: #2c2f35;
    --brand-tint: #23233a;
    --wa-tint: #12271c;
    --success-tint: #10241a;
    --danger-tint: #2a1616;
    --warning-tint: #2a2010;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Dashboard two-column layout ---------- */

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 18px;
  align-items: start;
}

.col-left, .col-right {
  min-width: 0;
}

.col-left { position: sticky; top: 20px; }

@media (max-width: 900px) {
  .dashboard-grid { grid-template-columns: 1fr; }
  .col-left { position: static; }
}

/* ---------- Header ---------- */

.topbar {
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.auth-card {
  max-width: 420px;
  margin: 40px auto 0;
}
.auth-card h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 4px;
}
.auth-card form label:first-of-type {
  margin-top: 4px;
}
.auth-card .btn.full {
  margin-top: 14px;
}
.hint.error {
  color: var(--danger);
  font-weight: 500;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--wa), var(--wa-dark));
  color: #fff;
  flex-shrink: 0;
}

.brand h1 {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.02em;
}

.brand p {
  margin: 2px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---------- Step cards ---------- */

.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 18px;
}

.step-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand-tint);
  color: var(--brand-dark);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.step-head h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.step-desc {
  margin: 0;
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- Connect tiles ---------- */

/* auto-fit responds to the actual container width (the narrow sidebar on
   desktop vs. the full-width card on mobile), unlike a viewport media query,
   which would stay 2-column even when the sidebar itself is too narrow. */
.connect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.connect-tile {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  background: var(--surface-2);
}

.connect-tile-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
}
.service-icon.wa-icon { color: var(--wa); }

.service-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.service-info strong {
  font-size: 0.92rem;
}

.tile-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 12px;
  line-height: 1.45;
}

/* ---------- Status badge ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 9px 2px 7px;
  border-radius: 999px;
  width: fit-content;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
}
.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}
.badge.ok {
  color: var(--success);
  background: var(--success-tint);
  border-color: transparent;
}
.badge.ok::before { background: var(--success); }
.badge.bad {
  color: var(--danger);
  background: var(--danger-tint);
  border-color: transparent;
}
.badge.bad::before { background: var(--danger); }
.badge.pending {
  color: var(--warning);
  background: var(--warning-tint);
  border-color: transparent;
}
.badge.pending::before { background: var(--warning); }

/* ---------- QR box ---------- */

.qr-box {
  text-align: center;
  margin-top: 4px;
}
.qr-box img {
  width: 160px;
  height: 160px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  padding: 6px;
}
.qr-box p {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 10px 0 0;
  line-height: 1.4;
}

/* ---------- Form elements ---------- */

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}

textarea, input[type="text"], input[type="password"], input[type="email"] {
  width: 100%;
  font-family: inherit;
  font-size: 0.94rem;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea:focus, input[type="text"]:focus, input[type="password"]:focus, input[type="email"]:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-tint);
}

.message-box {
  font-size: 1rem;
  line-height: 1.5;
}

.field-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 7px 0 0;
}

.manual-entry {
  margin-top: 18px;
}

.recipient-summary {
  margin: 16px 0 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}
.recipient-summary strong {
  color: var(--brand-dark);
  font-size: 1rem;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.05s ease, filter 0.15s ease, background 0.15s ease;
}
.btn:hover:not(:disabled) { filter: brightness(0.97); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.btn.primary {
  background: var(--wa);
  border-color: var(--wa);
  color: #fff;
}
.btn.primary:hover:not(:disabled) { background: var(--wa-dark); border-color: var(--wa-dark); }

.btn.secondary {
  background: var(--surface);
  border-color: var(--border);
}

.btn.full { width: 100%; }
.btn.small { padding: 8px 14px; font-size: 0.83rem; }
.btn.large { padding: 14px 28px; font-size: 1rem; border-radius: 12px; }

.send-card {
  text-align: center;
  padding: 28px 24px;
}
.send-card .hint {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Contacts list ---------- */

.contacts-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.search-input { flex: 1; min-width: 160px; }

.contacts-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 8px 0;
  min-height: 1em;
}

.contacts-list {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px;
  margin-bottom: 18px;
  background: var(--surface-2);
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
}
.contact-row:hover { background: var(--surface); }

.contact-row input[type="checkbox"] {
  accent-color: var(--brand);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brand-tint);
  color: var(--brand-dark);
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}

.contact-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.contact-row .name {
  font-weight: 500;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.contact-row .phone {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-left: auto;
  padding-left: 8px;
  flex-shrink: 0;
}

/* ---------- Groups ---------- */

.groups-box { margin-bottom: 18px; }

.group-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
}
.group-row:hover { background: var(--surface); }

.group-row input[type="checkbox"] {
  accent-color: var(--brand);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.avatar.group-avatar {
  background: var(--wa-tint);
  color: var(--wa-dark);
}

.group-row .name {
  font-weight: 500;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.group-row .count {
  color: var(--text-muted);
  font-size: 0.78rem;
  flex-shrink: 0;
}

.group-row .group-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.icon-btn {
  border: none;
  background: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  cursor: pointer;
  padding: 5px 9px;
  border-radius: 6px;
}
.icon-btn:hover { background: var(--brand-tint); color: var(--brand-dark); }
.icon-btn.danger:hover { background: var(--danger-tint); color: var(--danger); }

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 21, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal {
  background: var(--surface);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  width: 100%;
  max-width: 460px;
  max-height: min(640px, 90vh);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-head h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}
.modal-close {
  border: none;
  background: var(--surface-2);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.modal-close:hover { background: var(--border); color: var(--text); }

#groupForm {
  padding: 18px 20px 20px;
  overflow-y: auto;
}

.group-numbers-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 40px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  margin-bottom: 12px;
}

.number-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 6px 5px 12px;
  font-size: 0.82rem;
}
.number-chip button {
  border: none;
  background: var(--danger-tint);
  color: var(--danger);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.65rem;
  line-height: 1;
  flex-shrink: 0;
}

.add-number-row {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}
.add-number-row input { flex: 1; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}

/* ---------- Progress log ---------- */

.log-summary {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.log-list {
  max-height: 280px;
  overflow-y: auto;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  background: var(--surface-2);
}
.log-line {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
}
.log-line::before {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-family: inherit;
}
.log-line.ok { color: var(--success); }
.log-line.ok::before { content: "✓"; background: var(--success-tint); }
.log-line.bad { color: var(--danger); }
.log-line.bad::before { content: "✕"; background: var(--danger-tint); }

/* ---------- Footer ---------- */

.foot-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 24px;
}

.legal-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
}
.legal-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}
.legal-links a:hover { color: var(--brand-dark); text-decoration: underline; }

/* ---------- Doc pages (home / privacy / terms) ---------- */

.doc-page {
  max-width: 720px;
  margin: 0 auto;
}

.doc-page .step-card { padding: 32px 36px; }

.doc-page h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.doc-page .updated {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 28px;
}

.doc-page h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 28px 0 10px;
}
.doc-page h2:first-of-type { margin-top: 0; }

.doc-page p, .doc-page li {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text);
}

.doc-page ul { margin: 8px 0; padding-left: 20px; }
.doc-page li { margin-bottom: 6px; }

.doc-page strong { color: var(--text); }

.doc-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.doc-nav a {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-dark);
  text-decoration: none;
}
.doc-nav a:hover { text-decoration: underline; }

.doc-links {
  display: flex;
  gap: 14px;
  font-size: 0.85rem;
}
.doc-links a { color: var(--text-muted); text-decoration: none; font-weight: 500; }
.doc-links a:hover { color: var(--brand-dark); text-decoration: underline; }

/* ---------- Admin ---------- */

#adminDashboard {
  max-width: 900px;
  margin: 0 auto;
}

.brand-mark.admin-mark {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
  margin-bottom: 16px;
}
.form-grid > div { min-width: 0; }
.form-grid label { margin: 0 0 6px; }

@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.users-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  white-space: nowrap;
}
.users-table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  padding: 10px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.users-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.users-table tr:last-child td { border-bottom: none; }

.users-table .muted { color: var(--text-muted); }

.delete-btn {
  border: none;
  background: none;
  color: var(--danger);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
.delete-btn:hover { background: var(--danger-tint); }