:root {
  color-scheme: light;
  --bg: #f0f2f5;
  --panel: #ffffff;
  --panel-hover: #f8f9fb;
  --text: #1a1d21;
  --text-secondary: #525866;
  --muted: #6b7280;
  --line: #e2e5ea;
  --line-light: #f0f2f5;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-light: #ccfbf1;
  --accent-text: #065f56;
  --accent-2: #3b82f6;
  --accent-2-hover: #2563eb;
  --accent-3: #8b5cf6;
  --accent-3-hover: #7c3aed;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --warn: #d97706;
  --warn-bg: #fffbeb;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 2px 8px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 180ms ease;
  --gradient-accent: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
  --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
  --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
  --gradient-warn: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
  --gradient-danger: linear-gradient(135deg, #dc2626 0%, #f87171 100%);
  --gradient-success: linear-gradient(135deg, #16a34a 0%, #4ade80 100%);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1117;
  --panel: #181b22;
  --panel-hover: #1f222b;
  --text: #e8eaef;
  --text-secondary: #9ca3af;
  --muted: #7c8594;
  --line: #282d36;
  --line-light: #1f222b;
  --accent: #14b8a6;
  --accent-hover: #2dd4bf;
  --accent-light: #042f2e;
  --accent-text: #5eead4;
  --accent-2: #60a5fa;
  --accent-2-hover: #93bbfd;
  --accent-3: #a78bfa;
  --accent-3-hover: #c4b5fd;
  --danger: #f87171;
  --danger-bg: #2d1515;
  --danger-border: #7f1d1d;
  --warn: #fbbf24;
  --warn-bg: #2d2305;
  --success: #4ade80;
  --success-bg: #052e16;
  --success-border: #166534;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow: 0 2px 8px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.6), 0 4px 8px rgba(0,0,0,0.4);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  transition: background var(--transition), color var(--transition);
}

button,
input,
select,
textarea {
  font: inherit;
  color: var(--text);
}

button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  cursor: pointer;
  font-weight: 500;
  font-size: 13px;
  transition: all var(--transition);
}

button:hover:not(:disabled) {
  background: var(--panel-hover);
  border-color: var(--muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

button.primary {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
}

button.primary:hover:not(:disabled) {
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.4);
  transform: translateY(-1px);
}

button.secondary {
  background: var(--gradient-blue);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

button.secondary:hover:not(:disabled) {
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.55;
  transform: none !important;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  background: var(--panel);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  background: var(--panel);
  transition: border-color var(--transition);
}

.contact-stack {
  display: grid;
  gap: 6px;
  min-width: 220px;
}

.contact-stack input,
.contact-stack select {
  width: 100%;
}

label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.shell {
  min-height: 100vh;
}

/* === TOPBAR === */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  height: 64px;
  background: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #14b8a6 100%);
  border-bottom: none;
  box-shadow: 0 2px 12px rgba(13, 148, 136, 0.25);
  position: sticky;
  top: 0;
  z-index: 10;
}

[data-theme="dark"] .topbar {
  background: linear-gradient(135deg, #064e3b 0%, #065f56 50%, #0d9488 100%);
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand strong {
  font-size: 17px;
  letter-spacing: -0.01em;
  color: #fff;
}

.brand span {
  color: rgba(255,255,255,0.75);
  font-size: 13px;
}

.topbar .topbar-actions button {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  backdrop-filter: blur(4px);
}

.topbar .topbar-actions button:hover {
  background: rgba(255,255,255,0.25);
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-1px);
}

/* === SIDEBAR === */
.layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  min-height: calc(100vh - 64px);
}

.sidebar {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 14px;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}

.nav {
  display: grid;
  gap: 4px;
}

.nav button {
  text-align: left;
  border-color: transparent;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
}

.nav button:hover:not(.active) {
  background: var(--line-light);
  transform: translateX(2px);
}

.nav button.active {
  background: var(--accent-light);
  border-color: transparent;
  color: var(--accent-text);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent);
}

/* === CONTENT === */
.content {
  padding: 28px;
  display: grid;
  gap: 22px;
  align-content: start;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

/* === PANELS === */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.panel:hover {
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.panel.panel-accent {
  border-left: 4px solid var(--accent);
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.panel.panel-blue {
  border-left: 4px solid var(--accent-2);
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.panel.panel-warn {
  border-left: 4px solid var(--warn);
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.panel.panel-success {
  border-left: 4px solid var(--success);
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
}

.subpanel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin: 0 0 14px;
  background: var(--panel-hover);
  transition: background var(--transition);
}

.subpanel h2 {
  font-size: 15px;
  margin: 0 0 12px;
}

/* === STAT CARDS === */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
  gap: 16px;
}

.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.stat:hover::before {
  opacity: 1;
}

.stat:nth-child(2)::before { background: var(--gradient-blue); }
.stat:nth-child(3)::before { background: var(--gradient-warn); }
.stat:nth-child(4)::before { background: var(--gradient-purple); }
.stat:nth-child(5)::before { background: var(--gradient-danger); }
.stat:nth-child(6)::before { background: var(--gradient-success); }

.stat:nth-child(2):hover { border-color: var(--accent-2); }
.stat:nth-child(3):hover { border-color: var(--warn); }
.stat:nth-child(4):hover { border-color: var(--accent-3); }
.stat:nth-child(5):hover { border-color: var(--danger); }
.stat:nth-child(6):hover { border-color: var(--success); }

.stat span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat strong {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* === ACTIONS / TOOLBAR === */
.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  align-items: center;
}

.toolbar input {
  flex: 1;
  min-width: 200px;
}

.bulk-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.pager {
  margin-top: 14px;
}

.inline-actions {
  display: grid;
  grid-template-columns: minmax(170px, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: end;
}

/* === LOGIN === */
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, #0f766e 0%, #0d9488 40%, #14b8a6 70%, #5eead4 100%);
}

[data-theme="dark"] .login {
  background: linear-gradient(135deg, #042f2e 0%, #064e3b 40%, #065f56 70%, #0d9488 100%);
}

.login .panel {
  width: min(430px, 100%);
  box-shadow: var(--shadow-lg);
  border: none;
  border-radius: var(--radius-lg);
  padding: 36px 30px;
}

.login .panel h2 {
  text-align: center;
  font-size: 24px;
  margin-bottom: 4px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login .panel .muted {
  text-align: center;
  margin-bottom: 8px;
}

.login form {
  display: grid;
  gap: 16px;
}

.login button.primary {
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

/* === TABLES === */
.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  min-width: 1180px;
}

th,
td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
  font-size: 13px;
}

th.checkbox-cell,
td.checkbox-cell {
  width: 42px;
  text-align: center;
}

th.max-connections-cell,
td.max-connections-cell {
  width: 112px;
  white-space: nowrap;
}

td.max-connections-cell input {
  width: 84px;
  min-width: 84px;
}

.customer-package {
  display: grid;
  gap: 4px;
}

.customer-package-meta {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.2;
  white-space: nowrap;
}

td.checkbox-cell input {
  width: 16px;
  height: 16px;
  min-width: 16px;
  margin: 0;
}

th {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--panel-hover);
  position: sticky;
  top: 0;
}

tr:hover td {
  background: var(--panel-hover);
}

tr.selected td {
  background: rgba(20, 184, 166, 0.08);
}

tr:last-child td {
  border-bottom: none;
}

td input,
td select {
  min-width: 0;
  height: 34px;
  padding: 5px 8px;
  font-size: 13px;
}

td button {
  padding: 6px 12px;
  font-size: 12px;
}

td .actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}

.sort-btn {
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition);
}

.sort-btn:hover {
  color: var(--accent);
}

/* === BADGES === */
.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  background: var(--line-light);
  color: var(--text-secondary);
  white-space: nowrap;
}

.badge.danger {
  color: #fff;
  background: var(--gradient-danger);
}

.badge.warn {
  color: #fff;
  background: var(--gradient-warn);
}

.badge.success {
  color: #fff;
  background: var(--gradient-success);
}

.badge.info {
  color: #fff;
  background: var(--gradient-blue);
}

.badge.channel-whatsapp {
  color: #fff;
  background: var(--gradient-success);
}

.badge.channel-telegram {
  color: #fff;
  background: var(--gradient-purple);
}

/* === NOTICES === */
.notice {
  border-left: 3px solid var(--accent-2);
  background: #eef4ff;
  color: #1e40af;
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.5;
}

[data-theme="dark"] .notice {
  background: #1e293b;
  color: #93c5fd;
}

.notice + .notice {
  margin-top: 10px;
}

.error {
  border-left-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

pre {
  margin: 10px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  font-size: 12px;
  background: var(--panel-hover);
  padding: 12px;
  border-radius: var(--radius-sm);
}

/* === MODAL === */
.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.5);
  z-index: 20;
  backdrop-filter: blur(6px);
}

.modal {
  width: min(520px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  animation: modalIn 200ms ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal h2 {
  margin: 0 0 16px;
}

.modal dl {
  display: grid;
  gap: 10px;
  margin: 0 0 16px;
}

.modal dl div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
}

.modal dt {
  color: var(--muted);
  font-size: 13px;
}

.modal dd {
  margin: 0;
  overflow-wrap: anywhere;
}

/* === THEME TOGGLE === */
.theme-toggle {
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.25);
  border-color: rgba(255,255,255,0.35);
}

/* === TURNSTILE === */
#turnstileWidget {
  display: flex;
  justify-content: center;
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    position: static;
    height: auto;
  }

  .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .nav button.active {
    box-shadow: none;
  }

  .grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .content {
    padding: 16px;
  }

  .topbar {
    padding: 0 16px;
  }

  .login .panel {
    padding: 28px 22px;
  }
}