split-tabs.css

:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-code: #0f172a;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-code: #e2e8f0;
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success-bg: #dcfce7;
  --success-text: #166534;
  --warning-bg: #fef9c3;
  --warning-text: #854d0e;
  --neutral-bg: #e2e8f0;
  --neutral-text: #334155;
  --radius: 8px;
  --radius-sm: 5px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 16px 20px 32px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.45;
  font-size: 14px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  background-color: var(--bg-subtle);
  padding: 1px 5px;
  border-radius: 4px;
}

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

/* Header */
.page-header {
  max-width: 1280px;
  margin: 0 auto 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.page-header h1 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.subtitle a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.subtitle a:hover {
  text-decoration: underline;
}

.viewport-badge {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  box-shadow: var(--shadow);
}

.viewport-badge span {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text-main);
  font-weight: 600;
}

/* Layout Grid */
.main-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 16px;
  align-items: start;
}

.column {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

/* Card */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.opener-card.active-opener {
  border-color: #93c5fd;
  background-color: #f8fbff;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.card-header h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.header-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.helper-text {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success-text);
}

.badge-warning {
  background-color: var(--warning-bg);
  color: var(--warning-text);
}

.badge-neutral {
  background-color: var(--neutral-bg);
  color: var(--neutral-text);
}

.badge-count {
  background-color: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

/* Form Elements */
.form-group {
  margin-bottom: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

label,
.group-label {
  display: block;
  font-weight: 600;
  font-size: 0.84rem;
  margin-bottom: 5px;
  color: var(--text-main);
}

.label-with-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
}

.label-with-toggle label {
  margin-bottom: 0;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background-color: #ffffff;
  color: var(--text-main);
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
  border-color: var(--primary);
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}

.preset-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.btn-chip {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.76rem;
  color: var(--text-main);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.btn-chip:hover {
  background-color: #e2e8f0;
  border-color: #94a3b8;
}

.size-control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.size-control-group.disabled {
  opacity: 0.45;
  pointer-events: none;
}

.size-control-group input[type="range"] {
  flex: 1;
  cursor: pointer;
}

.size-control-group .number-input {
  width: 64px;
  text-align: center;
}

.unit-label {
  font-weight: 600;
  color: var(--text-muted);
}

.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding: 6px 8px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.checkbox-label,
.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
  font-size: 0.82rem;
  cursor: pointer;
  margin-bottom: 0;
}

/* Code Preview */
.code-preview-box {
  background-color: var(--bg-code);
  color: var(--text-code);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 12px;
  overflow-x: auto;
}

.code-preview-header {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  margin-bottom: 4px;
}

.code-preview-box code {
  background: transparent;
  color: #38bdf8;
  padding: 0;
  font-size: 0.85rem;
  word-break: break-all;
  white-space: pre-wrap;
}

/* Declarative Test Box */
.declarative-box {
  margin-top: 12px;
  padding: 10px 12px;
  background-color: var(--bg-subtle);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
}

.declarative-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.declarative-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.declarative-anchor {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  font-size: 0.88rem;
}

.declarative-markup {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  background-color: #ffffff;
  padding: 6px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  word-break: break-all;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, opacity 0.15s;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-Primary code,
.btn-primary code {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-subtle);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #e2e8f0;
}

.btn-danger {
  background-color: #fee2e2;
  color: var(--danger);
  border-color: #fecaca;
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) code {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.btn-lg {
  width: 100%;
  padding: 10px 16px;
  font-size: 0.95rem;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.78rem;
}

/* Opener inline form */
.inline-message-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-row {
  display: flex;
  gap: 8px;
}

.opener-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Broadcast bar */
.broadcast-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

/* Opened Windows List */
.windows-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.window-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  background-color: #ffffff;
}

.window-item.window-closed {
  background-color: var(--bg-subtle);
  opacity: 0.85;
}

.window-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

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

.window-id {
  font-weight: 700;
  font-size: 0.9rem;
}

.window-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  word-break: break-all;
}

.window-meta div {
  margin-bottom: 2px;
}

.window-controls {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.window-events-box {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 0.78rem;
}

.window-events-title {
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-size: 0.74rem;
  text-transform: uppercase;
}

.window-events-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 110px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.window-event-entry {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
  padding: 2px 4px;
  border-radius: 3px;
  word-break: break-word;
}

.window-event-in {
  background-color: #dbeafe;
  color: #1e40af;
}

.window-event-out {
  background-color: #f1f5f9;
  color: #334155;
}

/* Incoming Message Events Log */
.messages-log {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 460px;
  overflow-y: auto;
}

.message-card {
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background-color: var(--bg-subtle);
}

.message-card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.message-sender {
  font-weight: 700;
  color: var(--text-main);
}

.message-payload {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.84rem;
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 6px 8px;
  margin-bottom: 8px;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-reply-form {
  display: flex;
  gap: 6px;
}

.message-reply-form input[type="text"] {
  padding: 4px 8px;
  font-size: 0.8rem;
}

.empty-state {
  margin: 0;
  padding: 20px 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.86rem;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
}