:root {
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --bg: #ffffff;
  --surface: #ffffff;
  --text: #111111;
  --muted: #525252;
  --border: #d4d4d8;
  --border-strong: #a1a1aa;
  --focus-ring: rgba(17, 17, 17, 0.2);
  --shadow: none;

  --table-head-bg: #f5f5f5;
  --error: #b4544b;
  --error-bg: #fff7f6;
  --error-border: #f3c8c4;
  --error-ring: rgba(232, 126, 114, 0.35);
  --warning: #9a6700;

  --chart-line: #27272a;
  --chart-fill: rgba(39, 39, 42, 0.12);
  --chart-axis: #3f3f46;
  --chart-grid: rgba(39, 39, 42, 0.14);
  --chart-tooltip-bg: #111111;
  --chart-tooltip-text: #f5f5f5;
}

:root[data-theme="dark"] {
  --bg: #0f0f14;
  --surface: #0f0f14;
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --border: #5b4aa1;
  --border-strong: #7f6bd0;
  --focus-ring: rgba(91, 74, 161, 0.5);
  --shadow: none;

  --table-head-bg: rgba(91, 74, 161, 0.18);
  --error: #ff8f84;
  --error-bg: rgba(255, 92, 76, 0.1);
  --error-border: rgba(255, 110, 96, 0.72);
  --error-ring: rgba(255, 99, 85, 0.45);
  --warning: #f7c65f;

  --chart-line: #8f7be3;
  --chart-fill: rgba(143, 123, 227, 0.2);
  --chart-axis: #ded9f3;
  --chart-grid: rgba(91, 74, 161, 0.35);
  --chart-tooltip-bg: #221c39;
  --chart-tooltip-text: #f4f4f5;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  transition: background-color 180ms ease, color 180ms ease;
}

.app-shell {
  width: min(1080px, 95vw);
  max-width: 100%;
  margin: 32px auto 48px;
}

.app-panel {
  display: grid;
  gap: 28px;
  min-width: 0;
}

.content-block {
  min-width: 0;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.app-header h1 {
  margin: 0;
  font-size: clamp(1.35rem, 1.2vw + 1rem, 1.9rem);
  letter-spacing: -0.03em;
}

.app-header p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 680px;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 120ms ease, border-color 120ms ease, background-color 120ms ease;
}

.share-link-button {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition:
    border-color 120ms ease,
    background-color 120ms ease,
    color 120ms ease;
}

.share-link-icon {
  display: inline-grid;
  place-items: center;
  width: 1.05rem;
  height: 1.05rem;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  line-height: 1;
}

.share-link-icon svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: currentColor;
  display: block;
  transform: translateY(-0.5px);
}

.share-link-icon--success,
.share-link-icon--error {
  display: none;
}

.share-link-button:hover {
  border-color: var(--border-strong);
}

.share-link-button:active {
  background: color-mix(in srgb, var(--surface) 90%, var(--border));
}

.share-link-button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.share-link-button--copied {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--surface) 84%, var(--border));
}

.share-link-button--copied .share-link-icon--default {
  display: none;
}

.share-link-button--copied .share-link-icon--success {
  display: inline-flex;
}

.share-link-button--error {
  border-color: var(--error-border);
  color: var(--error);
}

.share-link-button--error .share-link-icon--default {
  display: none;
}

.share-link-button--error .share-link-icon--error {
  display: inline-flex;
}

.theme-toggle:hover {
  border-color: var(--border-strong);
}

.theme-toggle:active {
  background: color-mix(in srgb, var(--surface) 90%, var(--border));
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 12px;
  row-gap: 2px;
}

.field {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.field[hidden] {
  display: none;
}

.field:not(.strategy-field) {
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "label error"
    "input input";
  column-gap: 8px;
  row-gap: 3px;
  align-items: end;
}

.field:not(.strategy-field) > span:first-child {
  grid-area: label;
  font-size: 0.95rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.field:not(.strategy-field) > input[type="number"],
.field:not(.strategy-field) > select {
  grid-area: input;
}

input[type="number"],
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
}

input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.field--full {
  grid-column: 1 / -1;
}

.strategy-field {
  border: 0;
  margin: 0;
  padding: 0;
}

.strategy-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.strategy-toggle input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.strategy-option {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  text-align: center;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: border-color 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}

.strategy-toggle input[type="radio"]:checked + .strategy-option {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px var(--focus-ring);
  background: color-mix(in srgb, var(--surface) 90%, var(--border));
}

.strategy-toggle input[type="radio"]:focus-visible + .strategy-option {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.field-error {
  display: block;
  grid-area: error;
  min-height: 0.85em;
  font-size: 0.76rem;
  color: var(--error);
  line-height: 1.1;
  white-space: normal;
  overflow-wrap: anywhere;
  max-width: 26ch;
  justify-self: end;
  text-align: right;
}

.field-error:empty {
  visibility: hidden;
}

.field-error--warning {
  color: var(--warning);
}

input[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: var(--error-border);
  box-shadow: 0 0 0 3px var(--error-ring);
}

input[aria-invalid="true"]:focus,
select[aria-invalid="true"]:focus {
  border-color: var(--error-border);
  box-shadow: 0 0 0 3px var(--error-ring);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  min-width: 0;
}

.summary-card {
  min-width: 0;
}

.summary-card h3 {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.summary-card p {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--text);
  overflow-wrap: anywhere;
}

.summary-card--display {
  display: grid;
  align-content: start;
  gap: 12px;
}

.summary-display-label {
  display: block;
}

.summary-display-label select {
  margin-top: 0;
  min-height: 2.5rem;
  font-size: 0.95rem;
}

.chart-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 10px;
}

.chart-mode-field {
  border: 0;
  margin: 0;
  padding: 0;
}

.chart-mode-toggle {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(0, auto));
  gap: 6px;
}

.chart-mode-toggle input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.chart-mode-option {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--surface);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: border-color 120ms ease, box-shadow 120ms ease, color 120ms ease;
}

.chart-mode-toggle input[type="radio"]:checked + .chart-mode-option {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 2px var(--focus-ring);
  color: var(--text);
}

.chart-mode-toggle input[type="radio"]:focus-visible + .chart-mode-option {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

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

.chart-frame {
  height: 320px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

#delay-chart {
  display: block;
  width: 100% !important;
  max-width: 100%;
}

.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

thead tr {
  background: var(--table-head-bg);
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.94rem;
}

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

.placeholder-cell {
  text-align: center;
  color: var(--muted);
  font-style: italic;
}

@media (max-width: 820px) {
  .controls-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .controls-grid {
    row-gap: 1px;
  }

  .chart-frame {
    height: 280px;
  }

  .chart-toolbar {
    justify-content: flex-start;
  }

  table {
    min-width: 520px;
  }
}

@media (max-width: 480px) {
  .app-shell {
    width: 94vw;
    margin: 20px auto 28px;
  }

  .panel {
    padding: 16px;
  }

  th,
  td {
    padding: 8px 9px;
    font-size: 0.88rem;
  }

  table {
    min-width: 460px;
  }

  .chart-mode-toggle {
    grid-template-columns: 1fr;
  }

  .chart-mode-option {
    text-align: center;
  }
}