:root {
  --sandbox-surface: #172033;
  --sandbox-text: #e7edf6;
  --sandbox-label: #c7d3e5;
  --sandbox-border: #334155;
  --sandbox-blue: #60a5fa;
  --sandbox-blue-hover: #3b82f6;
  --sandbox-blue-shadow: rgba(96, 165, 250, 0.22);
  --sandbox-red: #fb7185;
  --sandbox-input-bg: #111827;
  --sandbox-input-border: #3d4b62;
  --sandbox-overlay: rgba(4, 11, 22, 0.76);
  --sandbox-shadow: 0 16px 42px rgba(0, 0, 0, 0.26);
  --sandbox-radius: 8px;
}

[data-theme="light"] {
  --sandbox-surface: #ffffff;
  --sandbox-text: #172033;
  --sandbox-label: #43536a;
  --sandbox-border: #d8e0eb;
  --sandbox-blue: #2563eb;
  --sandbox-blue-hover: #1d4ed8;
  --sandbox-blue-shadow: rgba(37, 99, 235, 0.18);
  --sandbox-red: #be123c;
  --sandbox-input-bg: #ffffff;
  --sandbox-input-border: #cbd5e1;
  --sandbox-overlay: rgba(23, 32, 51, 0.72);
  --sandbox-shadow: 0 16px 42px rgba(31, 42, 68, 0.08);
}

.session-id-modal-open {
  overflow: hidden;
}

.session-id-dialog[hidden] {
  display: none;
}

.session-id-dialog {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--sandbox-overlay);
  backdrop-filter: blur(8px);
}

.session-id-panel {
  width: min(440px, 100%);
  padding: 22px;
  border: 1px solid var(--sandbox-border);
  border-radius: var(--sandbox-radius);
  background: var(--sandbox-surface);
  color: var(--sandbox-text);
  box-shadow: var(--sandbox-shadow);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

.session-id-panel h2 {
  margin: 0 0 16px;
  font-size: 18px;
}

.session-id-panel label {
  display: block;
  margin-bottom: 8px;
  color: var(--sandbox-label);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.session-id-panel input {
  width: 100%;
  box-sizing: border-box;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--sandbox-input-border);
  border-radius: 6px;
  background: var(--sandbox-input-bg);
  color: var(--sandbox-text);
  font: inherit;
}

.session-id-panel input:focus {
  border-color: var(--sandbox-blue);
  outline: 3px solid var(--sandbox-blue-shadow);
}

.session-id-error {
  margin: 10px 0 0;
  color: var(--sandbox-red);
  font-size: 12px;
}

.session-id-submit {
  width: 100%;
  min-height: 42px;
  margin-top: 16px;
  border: 1px solid var(--sandbox-blue);
  border-radius: 6px;
  background: var(--sandbox-blue);
  color: #ffffff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.session-id-submit:hover {
  background: var(--sandbox-blue-hover);
  border-color: var(--sandbox-blue-hover);
}