/* ===== WebSocket Тестер — дружелюбная тёмная тема ===== */
:root {
  --bg: #070b14;
  --surface: #0d1424;
  --surface-2: #111a2e;
  --field-bg: #16213a;
  --field-bg-hover: #1a2745;
  --field-border: transparent;
  --ring: rgba(99, 102, 241, .45);
  --border: rgba(148, 163, 184, .1);
  --border-strong: rgba(148, 163, 184, .18);
  --text: #e6ecf7;
  --text-dim: #8b9bb4;
  --text-faint: #5b6a82;
  --accent: #34d399;
  --accent-strong: #10b981;
  --accent-soft: rgba(52, 211, 153, .12);
  --violet: #6366f1;
  --violet-hover: #5558e8;
  --violet-soft: rgba(99, 102, 241, .15);
  --blue: #60a5fa;
  --red: #f87171;
  --red-soft: rgba(248, 113, 113, .12);
  --yellow: #fbbf24;
  --cyan: #67e8f9;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-2: 0 8px 24px rgba(3, 7, 18, .55);
  --r-lg: 16px;
  --r-md: 12px;
  --r-sm: 9px;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  --transition: .18s cubic-bezier(.4, 0, .2, 1);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

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

html, body { height: 100%; }

body {
  background:
    radial-gradient(1100px 500px at 15% -5%, rgba(99, 102, 241, .09) 0%, transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(52, 211, 153, .06) 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 20px 44px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Общая фокус-обводка (доступность) */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--ring);
  border-radius: var(--r-sm);
}

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

/* ===== Шапка ===== */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}
.topbar h1 { font-size: 24px; font-weight: 700; letter-spacing: -.2px; }
.subtitle { color: var(--text-dim); margin-top: 6px; font-size: 14px; }

.mode-switch {
  display: flex;
  gap: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
}
.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 9px 16px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
}
.mode-btn:hover:not(.active):not(:disabled) { color: var(--text); background: rgba(148,163,184,.08); }
.mode-btn.active {
  background: var(--violet);
  color: #fff;
  box-shadow: var(--shadow-1);
}
.mode-btn:disabled { opacity: .45; cursor: default; }

/* ===== Основная панель ===== */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px;
  box-shadow: var(--shadow-2);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.layout-icons {
  display: flex;
  gap: 2px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
}
.layout-btn {
  background: transparent;
  border: none;
  color: var(--text-faint);
  font-size: 15px;
  padding: 5px 11px;
  border-radius: 7px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.layout-btn:hover { color: var(--text); }
.layout-btn.active { background: var(--violet); color: #fff; }

.reset-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.reset-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--field-bg); }

/* ===== Вкладки подключений ===== */
.tabs-row {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  border-bottom: 1px solid var(--border);
}
.tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(148,163,184,.25) transparent;
}
.tabs::-webkit-scrollbar { height: 5px; width: 5px; }
.tabs::-webkit-scrollbar-thumb { background: rgba(148,163,184,.25); border-radius: 3px; }
.tabs::-webkit-scrollbar-track { background: transparent; }

.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--text-dim);
  padding: 10px 14px;
  border-radius: 11px 11px 0 0;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  flex: none;
  margin-bottom: -1px;
  transition: background var(--transition), color var(--transition);
}
.tab:hover:not(.active) { background: rgba(148,163,184,.06); color: var(--text); }
.tab .tab-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-faint);
  flex: none;
  transition: background var(--transition), box-shadow var(--transition);
}
.tab.connected .tab-dot { background: var(--accent); box-shadow: 0 0 8px rgba(52,211,153,.6); }
.tab.connecting .tab-dot { background: var(--yellow); animation: pulse 1.2s ease-in-out infinite; }
.tab.active {
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--text);
}
.tab-close {
  border: none;
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  padding: 3px 5px;
  border-radius: 6px;
  display: none;
  transition: color var(--transition), background var(--transition);
}
.tab.active .tab-close { display: inline; }
.tab-close:hover { color: var(--red); background: var(--red-soft); }

.tab-add {
  background: transparent;
  border: 1px dashed var(--border-strong);
  color: var(--text-dim);
  font-size: 17px;
  width: 36px;
  height: 36px;
  margin-bottom: 3px;
  cursor: pointer;
  border-radius: 10px;
  display: grid;
  place-items: center;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.tab-add:hover {
  color: var(--text);
  border-color: var(--violet);
  background: var(--violet-soft);
}

/* ===== Панели подключений (раскладка) ===== */
.panes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  flex: 1;
  min-height: 0;
  align-items: start;
}
.panes.layout-2 { grid-template-columns: repeat(2, 1fr); }
.panes.layout-3 { grid-template-columns: repeat(3, 1fr); }

/* ===== Статус и URL ===== */
.conn-bar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: 12px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  transition: border-color var(--transition), background var(--transition);
}
.conn-bar[hidden] { display: none; }
.conn-bar.pane-active {
  border-color: var(--border);
  background: rgba(99, 102, 241, .04);
}

.status-line { display: flex; align-items: center; gap: 10px; }
.status-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--text-faint);
  flex: none;
  transition: background var(--transition), box-shadow var(--transition);
}
.status-dot.connecting { background: var(--yellow); animation: pulse 1.2s ease-in-out infinite; }
.status-dot.connected { background: var(--accent); box-shadow: 0 0 10px rgba(52,211,153,.6); }
.status-dot.error { background: var(--red); }
@keyframes pulse { 50% { opacity: .35; } }

.status-text {
  font-size: 12px;
  letter-spacing: .8px;
  color: var(--text-dim);
  font-weight: 600;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}
.status-text.connected { color: var(--accent); background: var(--accent-soft); border-color: rgba(52,211,153,.25); }
.status-text.error { color: var(--red); background: var(--red-soft); border-color: rgba(248,113,113,.25); }

.traffic { margin-left: auto; display: flex; gap: 10px; }
.traffic span {
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  background: var(--surface-2);
  color: var(--text-dim);
}
.traffic b { font-weight: 600; }
.traffic-up b { color: var(--blue); }
.traffic-down b { color: var(--accent); }

/* Мягкое «заполненное» поле без жёсткой рамки */
.field {
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: var(--r-md);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.field:hover { background: var(--field-bg-hover); }
.field:focus-within {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px var(--violet-soft);
  background: var(--surface-2);
}

.url-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
  padding: 7px;
}
.url-badge {
  align-self: center;
  background: rgba(148,163,184,.1);
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .5px;
  padding: 6px 9px;
  border-radius: 8px;
  flex: none;
}
.url-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  min-width: 0;
  padding: 8px 4px;
}
.url-input::placeholder { color: var(--text-faint); }

.connect-btn {
  background: var(--accent-strong);
  border: none;
  color: #04110a;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: 10px;
  cursor: pointer;
  flex: none;
  box-shadow: var(--shadow-1);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.connect-btn:hover { background: #0ea371; }
.connect-btn:active { transform: scale(.98); }
.connect-btn.disconnect { background: var(--red); color: #2a0707; }
.connect-btn.disconnect:hover { background: #ef5350; }

/* ===== Редактор сообщения ===== */
.msg-section {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 12px 14px 14px;
}
.msg-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.section-label {
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--text-dim);
  font-weight: 700;
}
.msg-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.json-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 5px 11px;
  border-radius: 999px;
  letter-spacing: .5px;
}
.json-badge.ok { color: var(--accent); background: var(--accent-soft); }
.json-badge.bad { color: var(--red); background: var(--red-soft); }

.tool-btn {
  background: rgba(148,163,184,.08);
  border: none;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .5px;
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.tool-btn:hover { color: var(--text); background: rgba(148,163,184,.16); }
.tool-btn:active { transform: scale(.97); }
.char-count { font-size: 12px; color: var(--text-faint); min-width: 36px; text-align: right; }

.msg-editor {
  width: 100%;
  min-height: 130px;
  resize: vertical;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 12px 14px;
  outline: none;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.msg-editor:hover { background: var(--field-bg-hover); }
.msg-editor:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px var(--violet-soft);
  background: var(--surface);
}
.msg-editor::placeholder { color: var(--text-faint); }

.msg-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.hint { font-size: 12px; color: var(--text-faint); }
.send-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--violet);
  border: none;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
}
.send-btn:hover:not(:disabled) { background: var(--violet-hover); }
.send-btn:active:not(:disabled) { transform: scale(.98); }
.send-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ===== Дополнительно ===== */
.advanced { border-top: 1px solid var(--border); padding-top: 12px; }
.advanced summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  user-select: none;
  list-style: none;
  padding: 4px 2px;
  border-radius: 8px;
  transition: color var(--transition);
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before {
  content: "▸";
  font-size: 12px;
  transition: transform var(--transition);
}
.advanced[open] summary::before { transform: rotate(90deg); }
.advanced summary:hover { color: var(--text); }

.adv-body {
  padding: 14px 4px 6px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.adv-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.adv-row label { font-size: 13px; color: var(--text-dim); flex: none; width: 90px; }
.adv-row .hb-msg-label { width: auto; }
.adv-input {
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 9px 13px;
  font-size: 13px;
  font-family: inherit;
  outline: none;
  flex: 1;
  min-width: 0;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.adv-input:hover { background: var(--field-bg-hover); }
.adv-input:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px var(--violet-soft);
}
.adv-input::placeholder { color: var(--text-faint); }
input[type="number"].adv-input { max-width: 120px; flex: none; }

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 9px;
  transition: background var(--transition);
}
.checkbox:hover { background: rgba(148,163,184,.06); }
.checkbox input {
  accent-color: var(--violet);
  width: 16px; height: 16px;
  cursor: pointer;
}

/* ===== Панель журнала ===== */
.log-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.log-filters {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 3px;
}
.filter-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .5px;
  padding: 7px 13px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.filter-btn:hover { color: var(--text); background: rgba(148,163,184,.08); }
.filter-btn.active { background: var(--violet); color: #fff; box-shadow: var(--shadow-1); }

.log-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-input {
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 999px;
  color: var(--text);
  padding: 8px 15px;
  font-size: 13px;
  width: 160px;
  outline: none;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.filter-input:hover { background: var(--field-bg-hover); }
.filter-input:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px var(--violet-soft);
}
.filter-input::placeholder { color: var(--text-faint); }

.pretty-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 999px;
  padding: 7px 13px;
  user-select: none;
  transition: color var(--transition), background var(--transition);
}
.pretty-toggle:hover { color: var(--text); background: var(--field-bg-hover); }
.pretty-toggle input { accent-color: var(--accent-strong); cursor: pointer; }

.limit-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: 999px;
  padding: 5px 8px 5px 14px;
  user-select: none;
  transition: color var(--transition), background var(--transition);
}
.limit-toggle:hover { color: var(--text); background: var(--field-bg-hover); }
.limit-select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(148,163,184,.12);
  border: none;
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  padding: 5px 24px 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  outline: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238b9bb4' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: background-color var(--transition);
}
.limit-select:hover { background-color: rgba(148,163,184,.2); }
.limit-select option { background: var(--surface-2); color: var(--text); }

.action-btn {
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.action-btn:hover { color: var(--text); background: var(--field-bg-hover); }
.action-btn:active { transform: scale(.97); }

/* ===== Журнал ===== */
.log-area {
  flex: 1;
  min-height: 260px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 13px;
  padding: 6px;
  scrollbar-width: thin;
  scrollbar-color: rgba(148,163,184,.22) transparent;
}
.log-area::-webkit-scrollbar { width: 8px; }
.log-area::-webkit-scrollbar-thumb { background: rgba(148,163,184,.22); border-radius: 4px; }
.log-area::-webkit-scrollbar-track { background: transparent; }

.log-entry {
  display: flex;
  gap: 14px;
  padding: 8px 10px;
  align-items: flex-start;
  border-radius: 8px;
  transition: background var(--transition);
}
.log-entry:hover { background: rgba(148,163,184,.05); }
.log-time { color: var(--text-faint); flex: none; padding-top: 1px; }
.log-kind { flex: none; font-size: 11px; font-weight: 700; letter-spacing: .8px; width: 92px; padding-top: 2px; }
.log-body { flex: 1; white-space: pre-wrap; word-break: break-word; min-width: 0; }
.log-size { flex: none; color: var(--text-faint); font-size: 12px; }

.log-entry.sent .log-kind { color: var(--blue); }
.log-entry.sent .log-time::before { content: "↑ "; color: var(--blue); }
.log-entry.received .log-kind { color: var(--accent); }
.log-entry.received .log-time::before { content: "↓ "; color: var(--accent); }
.log-entry.received .log-body { color: var(--accent); }
.log-entry.info .log-kind { color: var(--text-dim); }
.log-entry.info .log-body { color: var(--text-dim); }
.log-entry.error .log-kind, .log-entry.error .log-body { color: var(--red); }
.log-entry.error { background: var(--red-soft); }
.log-entry.heartbeat .log-kind, .log-entry.heartbeat .log-body { color: var(--cyan); }

.log-empty {
  color: var(--text-faint);
  text-align: center;
  padding: 48px 16px;
  font-family: "Segoe UI", sans-serif;
  font-size: 13px;
}
.log-empty .log-empty-icon { font-size: 26px; display: block; margin-bottom: 10px; opacity: .7; }

/* ===== Подсветка JSON ===== */
.j-key { color: var(--cyan); }
.j-str { color: var(--accent); }
.j-num { color: var(--yellow); }
.j-bool { color: #fb923c; }
.j-null { color: var(--text-faint); }

/* ===== Тосты ===== */
.toasts {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 360px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 13px;
  padding: 11px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow-2);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease;
}
.toast.show { opacity: 1; transform: none; }
.toast .toast-icon { flex: none; font-size: 15px; }
.toast.success { border-color: rgba(52,211,153,.35); }
.toast.success .toast-icon { color: var(--accent); }
.toast.error { border-color: rgba(248,113,113,.35); }
.toast.error .toast-icon { color: var(--red); }
.toast.warn { border-color: rgba(251,191,36,.35); }
.toast.warn .toast-icon { color: var(--yellow); }

/* ===== Подвал ===== */
.footer {
  text-align: center;
  color: var(--text-faint);
  font-size: 12px;
  margin-top: 20px;
}

@media (max-width: 1100px) {
  .panes.layout-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .topbar { flex-direction: column; }
  .log-toolbar { flex-direction: column; align-items: stretch; }
  .log-actions { flex-wrap: wrap; }
  .panel { padding: 14px; }
  .panes.layout-2, .panes.layout-3 { grid-template-columns: 1fr; }
}