:root {
  --bg: #0c0c0e;
  --panel: #141417;
  --panel-hover: #19191e;
  --border: #232328;
  --border-light: #2e2e36;
  --text-primary: #ededf0;
  --text-secondary: #9a9aa2;
  --text-muted: #64646e;
  --accent: #7c7c8a;
  --accent-active: #9e9eb0;
  --status-green: #22c55e;
  --status-red: #ef4444;
  --status-orange: #f59e0b;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html, body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  min-height: 100vh;
  max-width: 100vw;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Common Components */
button {
  cursor: pointer;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  transition: all 0.15s ease;
  border: 1px solid var(--border-light);
  background: var(--panel);
  color: var(--text-primary);
}

button:hover {
  background: var(--panel-hover);
  border-color: var(--accent);
}

button.btn-primary {
  background: #2b2b32;
  border-color: #3e3e48;
  color: #ffffff;
}

button.btn-primary:hover {
  background: #393944;
}

button.btn-danger {
  background: #241415;
  border-color: #4a1d20;
  color: #f87171;
}

button.btn-danger:hover {
  background: #381a1d;
  border-color: #ef4444;
}

input, select {
  background: #111114;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 9px 12px;
  border-radius: 4px;
  font-size: 13px;
  outline: none;
  font-family: inherit;
}

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

/* Login Window */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 32px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.login-card h1 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.login-card p.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input {
  width: 100%;
}

.lockout-alert {
  background: #241415;
  border: 1px solid #4a1d20;
  color: #f87171;
  padding: 12px;
  border-radius: 4px;
  font-size: 13px;
  margin-bottom: 18px;
  display: none;
}

.lockout-timer {
  font-family: var(--font-mono);
  font-weight: 700;
}

/* App Header */
header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-brand h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.header-meta {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Main Container */
main.dashboard {
  flex: 1;
  max-width: 1360px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 28px;
}

/* Telemetry Grid */
.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.telemetry-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 16px;
}

.telemetry-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.telemetry-value {
  font-size: 22px;
  font-weight: 600;
  font-family: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.3px;
  white-space: nowrap;
  color: var(--text-primary);
  display: inline-block;
  min-width: 130px;
}

.telemetry-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Services & Protocols Control Section */
.section-title {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.control-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.control-info h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.control-info p {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 12px;
  background: #111114;
  border: 1px solid var(--border);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.status-dot.active { background: var(--status-green); }
.status-dot.inactive { background: var(--status-red); }

/* Chart Section */
.chart-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 20px;
  margin-bottom: 24px;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.chart-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.telemetry-freq-bar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #101014;
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 6px;
}

.freq-label {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.freq-presets {
  display: flex;
  gap: 3px;
}

.btn-freq {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.2;
}

.btn-freq:hover {
  background: #1d1d24;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-freq.active {
  background: #1e293b;
  color: #60a5fa;
  border-color: #3b82f6;
  font-weight: 600;
}

.custom-freq-box {
  display: flex;
  align-items: center;
  gap: 4px;
  border-left: 1px solid var(--border);
  padding-left: 6px;
  margin-left: 2px;
}

.custom-freq-box input {
  width: 54px;
  padding: 2px 5px;
  font-size: 11px;
  font-family: var(--font-mono);
  height: 22px;
  background: #09090c;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-primary);
}

.btn-freq-set {
  background: #202028;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 2px 8px;
  height: 22px;
  font-size: 11px;
  border-radius: 3px;
  cursor: pointer;
  line-height: 1;
}

.btn-freq-set:hover {
  background: #2d2d3a;
  color: var(--text-primary);
  border-color: #60a5fa;
}

.chart-legend {
  display: flex;
  gap: 18px;
  font-size: 12px;
  font-family: var(--font-mono);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-color {
  width: 12px;
  height: 3px;
  border-radius: 2px;
}

canvas#telemetryChart {
  width: 100%;
  height: 220px;
  display: block;
}

/* Manager Table */
.manager-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 20px;
}

.manager-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
  flex-wrap: wrap;
}

.manager-title-group {
  min-width: 0;
}

.manager-title-group h2 {
  font-size: 16px;
  font-weight: 600;
}

.manager-title-group p {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  margin-top: 14px;
}

.table-wrapper::-webkit-scrollbar {
  height: 6px;
}

.table-wrapper::-webkit-scrollbar-track {
  background: #0d0d12;
  border-radius: 3px;
}

.table-wrapper::-webkit-scrollbar-thumb {
  background: #272733;
  border-radius: 3px;
}

.table-wrapper::-webkit-scrollbar-thumb:hover {
  background: #3b82f6;
}

/* Visibility switches */
.desktop-only {
  display: block;
}

.mobile-only {
  display: none;
}

/* Mobile Client Card Layout */
.client-mobile-card {
  background: #101014;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
}

.client-mobile-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.client-mobile-name {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  font-family: var(--font-mono);
}

.client-mobile-protos {
  font-size: 10px;
  background: #181822;
  border: 1px solid var(--border);
  color: #94a3b8;
  padding: 2px 7px;
  border-radius: 4px;
  font-family: var(--font-mono);
  word-break: break-all;
}

.client-mobile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  background: #09090c;
  border: 1px solid #1a1a22;
  border-radius: 4px;
  padding: 8px 10px;
  margin-bottom: 12px;
}

.stat-mini {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stat-mini-label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  font-family: var(--font-mono);
}

.stat-mini-val {
  font-size: 11px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}

.client-mobile-actions {
  display: flex;
  gap: 8px;
}

.client-mobile-actions button {
  padding: 8px 12px;
  font-size: 12px;
  border-radius: 4px;
}

table.client-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

table.client-table th {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  white-space: nowrap;
}

table.client-table td {
  padding: 10px 10px;
  border-bottom: 1px solid #1c1c20;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
}

.traffic-cell {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.traffic-down {
  color: #60a5fa !important;
}

.traffic-up {
  color: #34d399 !important;
}

table.client-table tr:hover td {
  background: #17171b;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-content {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  max-width: 580px;
  width: 100%;
  padding: 24px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content.modal-wide {
  max-width: 1060px;
  width: 95vw;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-shrink: 0;
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

#modalLinksContainer {
  overflow-y: auto;
  max-height: calc(90vh - 120px);
  padding-right: 6px;
}

#modalLinksContainer::-webkit-scrollbar {
  width: 6px;
}

#modalLinksContainer::-webkit-scrollbar-track {
  background: #0d0d12;
  border-radius: 3px;
}

#modalLinksContainer::-webkit-scrollbar-thumb {
  background: #272733;
  border-radius: 3px;
}

#modalLinksContainer::-webkit-scrollbar-thumb:hover {
  background: #3b82f6;
}

.modal-subscription-card {
  background: #0d0d12;
  border: 1px solid #2563eb;
  border-radius: 6px;
  padding: 14px;
  margin-bottom: 14px;
}

.modal-nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 12px;
}

@media (max-width: 820px) {
  .modal-nodes-grid {
    grid-template-columns: 1fr;
  }
}

.proto-tech-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  background: #181822;
  border: 1px solid var(--border);
  color: #94a3b8;
  padding: 2px 7px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.btn-toggle-qr {
  background: #181820;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 3px 9px;
  font-size: 11px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-toggle-qr:hover {
  background: #242430;
  color: #60a5fa;
  border-color: #3b82f6;
}

.btn-toggle-qr.active {
  background: #1e293b;
  color: #60a5fa;
  border-color: #3b82f6;
}

.qr-collapsible {
  display: none;
  text-align: center;
  padding-top: 14px;
  margin-top: 10px;
  border-top: 1px solid #1a1a24;
}

.qr-collapsible img {
  width: 180px;
  height: 180px;
  background: #ffffff;
  padding: 8px;
  border-radius: 6px;
  display: inline-block;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.qr-collapsible .qr-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
}

.link-block {
  background: #0d0d10;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 12px;
}

.link-title {
  font-size: 12px;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.node-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  min-width: 0;
}

.node-title-wrap .node-name {
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.node-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.link-text {
  font-family: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 11px;
  line-height: 1.5;
  word-break: break-all;
  white-space: normal;
  color: var(--text-secondary);
  background: #09090b;
  padding: 10px 12px;
  border-radius: 4px;
  border: 1px solid #1c1c24;
  margin-top: 8px;
  margin-bottom: 4px;
  user-select: all;
}

/* ==================== RESPONSIVE RULES (PHONES & SMALL SCREENS) ==================== */

@media (max-width: 860px) {
  .desktop-only {
    display: none !important;
  }
  .mobile-only {
    display: flex !important;
    flex-direction: column;
    gap: 12px;
    margin-top: 14px;
  }
  .btn-new-client {
    width: 100%;
    padding: 10px;
    font-size: 13px;
  }
}

@media (max-width: 640px) {
  header.app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px 16px;
  }
  .header-brand {
    justify-content: space-between;
  }
  .header-actions {
    display: flex;
    gap: 8px;
    width: 100%;
  }
  .header-actions button {
    flex: 1;
    padding: 8px 6px;
    font-size: 11px;
    white-space: nowrap;
  }
  main.dashboard {
    padding: 12px 14px;
  }
  .telemetry-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .telemetry-card {
    padding: 10px 12px;
  }
  .telemetry-value {
    font-size: 16px;
    min-width: 0;
  }
  .telemetry-label {
    font-size: 10px;
    margin-bottom: 3px;
  }
  .telemetry-sub {
    font-size: 10px;
  }
  .chart-card {
    padding: 14px;
  }
  .chart-header-left {
    width: 100%;
    gap: 8px;
  }
  .telemetry-freq-bar {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    gap: 6px;
    padding: 6px 8px;
  }
  .freq-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }
  .btn-freq {
    padding: 3px 6px;
    font-size: 10px;
  }
  .custom-freq-box {
    margin-left: 0;
    border-left: none;
    padding-left: 0;
  }
  .controls-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .control-card {
    padding: 12px;
  }
  .modal-backdrop {
    padding: 10px;
  }
  .modal-content {
    padding: 16px;
    width: 96vw;
    max-height: 94vh;
  }
  .modal-content.modal-wide {
    width: 96vw;
    max-height: 94vh;
  }
}

/* RU Exclusion Tabs & Telegram Badges */
.ru-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

.btn-tab {
  background: #18181f;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-tab:hover {
  border-color: #3b82f6;
  color: #fff;
}

.btn-tab.active {
  background: #1d283a;
  border-color: #3b82f6;
  color: #60a5fa;
  font-weight: 600;
}

.badge-tg {
  display: inline-block;
  font-size: 10px;
  font-family: var(--font-mono);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
}