:root {
  color-scheme: light;
  --bg: #f6f3ec;
  --bg-soft: #fcfaf7;
  --paper: rgba(255, 255, 255, 0.88);
  --panel: rgba(255, 255, 255, 0.94);
  --ink: #18211d;
  --muted: #65726b;
  --line: rgba(24, 33, 29, 0.09);
  --border-soft: rgba(255, 255, 255, 0.7);
  --accent: #165c46;
  --accent-strong: #103b2f;
  --accent-soft: rgba(22, 92, 70, 0.09);
  --sun: #cca04f;
  --danger: #8a2d2d;
  --danger-soft: rgba(138, 45, 45, 0.12);
  --success: #14543f;
  --success-soft: rgba(20, 84, 63, 0.12);
  --shadow: 0 18px 48px rgba(38, 31, 21, 0.07);
  --shadow-sm: 0 10px 28px rgba(38, 31, 21, 0.05);
  --body-radial-left: rgba(204, 160, 79, 0.08);
  --body-radial-right: rgba(22, 92, 70, 0.06);
  --body-gradient-start: #fbfaf6;
  --body-gradient-mid: #f5f1ea;
  --body-gradient-end: #efebe3;
  --tabs-bg: rgba(255, 255, 255, 0.78);
  --tabs-ring: rgba(24, 33, 29, 0.08);
  --tab-hover-bg: rgba(24, 33, 29, 0.04);
  --button-ghost-bg: rgba(24, 33, 29, 0.045);
  --button-ghost-text: var(--ink);
  --input-bg: rgba(255, 255, 255, 0.94);
  --input-border: rgba(23, 33, 28, 0.12);
  --input-focus-border: rgba(22, 92, 70, 0.48);
  --input-focus-ring: rgba(22, 92, 70, 0.12);
  --builder-card-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(251, 248, 242, 0.96));
  --builder-card-border: rgba(23, 33, 28, 0.08);
  --tooltip-bg: rgba(23, 30, 27, 0.96);
  --tooltip-text: #fffdf8;
  --code-bg: #111916;
  --code-text: #eef3ee;
  --info-bg: rgba(22, 92, 70, 0.07);
  --support-bg: rgba(249, 247, 242, 0.92);
  --result-bg: rgba(255, 255, 255, 0.84);
  --result-success-bg: linear-gradient(180deg, rgba(20, 84, 63, 0.07), rgba(255, 255, 255, 0.9));
  --result-error-bg: linear-gradient(180deg, rgba(138, 45, 45, 0.08), rgba(255, 255, 255, 0.9));
  --advanced-bg: rgba(249, 247, 242, 0.92);
  --inline-note-bg: rgba(22, 92, 70, 0.1);
  --inline-note-text: #155341;
  --pill-bg: rgba(23, 33, 28, 0.08);
  --trace-item-bg: rgba(255, 255, 255, 0.84);
  --trace-item-pass-bg: rgba(20, 84, 63, 0.06);
  --trace-item-fail-bg: rgba(138, 45, 45, 0.05);
  --radius: 22px;
  --radius-sm: 16px;
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
  --font-code: "IBM Plex Mono", "SFMono-Regular", "Consolas", monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101512;
  --bg-soft: #18201c;
  --paper: rgba(18, 25, 22, 0.92);
  --panel: rgba(17, 24, 21, 0.96);
  --ink: #edf2ec;
  --muted: #a3b1aa;
  --line: rgba(237, 242, 236, 0.12);
  --border-soft: rgba(255, 255, 255, 0.08);
  --accent: #5ec29b;
  --accent-strong: #92e3bf;
  --accent-soft: rgba(94, 194, 155, 0.16);
  --sun: #d6a24a;
  --danger: #f08d8d;
  --danger-soft: rgba(240, 141, 141, 0.16);
  --success: #8ed8b8;
  --success-soft: rgba(142, 216, 184, 0.16);
  --shadow: 0 22px 56px rgba(0, 0, 0, 0.22);
  --shadow-sm: 0 12px 26px rgba(0, 0, 0, 0.16);
  --body-radial-left: rgba(214, 162, 74, 0.06);
  --body-radial-right: rgba(94, 194, 155, 0.06);
  --body-gradient-start: #0f1512;
  --body-gradient-mid: #141b18;
  --body-gradient-end: #1a2320;
  --tabs-bg: rgba(18, 25, 22, 0.8);
  --tabs-ring: rgba(255, 255, 255, 0.06);
  --tab-hover-bg: rgba(255, 255, 255, 0.06);
  --button-ghost-bg: rgba(255, 255, 255, 0.06);
  --button-ghost-text: var(--ink);
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.12);
  --input-focus-border: rgba(94, 194, 155, 0.5);
  --input-focus-ring: rgba(94, 194, 155, 0.16);
  --builder-card-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.016));
  --builder-card-border: rgba(255, 255, 255, 0.08);
  --tooltip-bg: rgba(7, 10, 8, 0.96);
  --tooltip-text: #f6faf7;
  --code-bg: #0d1411;
  --code-text: #edf2ec;
  --info-bg: rgba(94, 194, 155, 0.14);
  --support-bg: rgba(255, 255, 255, 0.032);
  --result-bg: rgba(255, 255, 255, 0.032);
  --result-success-bg: linear-gradient(180deg, rgba(94, 194, 155, 0.12), rgba(255, 255, 255, 0.03));
  --result-error-bg: linear-gradient(180deg, rgba(240, 141, 141, 0.12), rgba(255, 255, 255, 0.03));
  --advanced-bg: rgba(255, 255, 255, 0.026);
  --inline-note-bg: rgba(94, 194, 155, 0.14);
  --inline-note-text: #9ce7c6;
  --pill-bg: rgba(255, 255, 255, 0.08);
  --trace-item-bg: rgba(255, 255, 255, 0.035);
  --trace-item-pass-bg: rgba(94, 194, 155, 0.1);
  --trace-item-fail-bg: rgba(240, 141, 141, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, var(--body-radial-left), transparent 28%),
    radial-gradient(circle at top right, var(--body-radial-right), transparent 24%),
    linear-gradient(180deg, var(--body-gradient-start) 0%, var(--body-gradient-mid) 38%, var(--body-gradient-end) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03), transparent 18%),
    linear-gradient(to right, rgba(24, 33, 29, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 33, 29, 0.03) 1px, transparent 1px);
  background-size: auto, 36px 36px, 36px 36px;
  z-index: -1;
}

a {
  color: var(--accent-strong);
}

button,
input,
select,
textarea,
summary {
  font: inherit;
}

button,
.file-button {
  cursor: pointer;
}

.page-shell {
  width: min(1240px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.72fr);
  gap: 1.15rem;
  align-items: stretch;
  margin-bottom: 1rem;
}

.hero__copy,
.hero__card,
.panel {
  background: var(--panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero__copy {
  padding: 1.3rem 1.45rem;
  position: relative;
  overflow: hidden;
}

.hero__copy::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(22, 92, 70, 0.08), transparent 70%);
  pointer-events: none;
}

.hero__copy h1 {
  margin: 0.08rem 0 0.3rem;
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 3vw, 3.35rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  max-width: 10ch;
}

.hero__lede {
  max-width: 40rem;
  margin: 0;
  color: var(--ink);
  font-size: 0.98rem;
  line-height: 1.58;
}

.privacy-card {
  padding: 1.15rem 1.1rem;
  position: relative;
  overflow: hidden;
}

.privacy-card::after {
  content: "";
  position: absolute;
  inset: auto -10% -20% auto;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(214, 162, 74, 0.18), transparent 70%);
}

.privacy-card p:last-of-type {
  margin-bottom: 0.7rem;
}

.privacy-card__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.privacy-card__facts span {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.58rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 700;
}

.privacy-card__label,
.eyebrow,
.panel__eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
}

.feature-list {
  display: grid;
  gap: 0.45rem;
  padding: 0;
  list-style: none;
  margin: 0.8rem 0 0;
}

.feature-list--inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 0.65rem;
}

.feature-list li {
  width: fit-content;
  padding: 0.34rem 0.62rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.76rem;
  line-height: 1.1;
  border: 1px solid color-mix(in srgb, var(--accent) 8%, transparent);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  position: sticky;
  top: 1rem;
  z-index: 10;
  padding: 0.4rem;
  border-radius: 20px;
  background: color-mix(in srgb, var(--tabs-bg) 90%, transparent);
  box-shadow:
    inset 0 0 0 1px var(--tabs-ring),
    var(--shadow-sm);
  backdrop-filter: blur(22px);
}

.tabs {
  display: inline-flex;
  padding: 0.14rem;
  gap: 0.35rem;
  border-radius: 999px;
  background: transparent;
  box-shadow: none;
}

.tab-link {
  padding: 0.76rem 1.08rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
  transition:
    background 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.tab-link:hover,
.tab-link:focus-visible {
  color: var(--accent-strong);
  background: var(--tab-hover-bg);
}

.tab-link.is-active {
  background: linear-gradient(135deg, var(--accent) 0%, #1f7a5e 100%);
  color: white;
}

.theme-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.24rem 0.58rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 0 1px var(--tabs-ring);
}

.theme-switcher__icon {
  display: inline-flex;
  width: 1rem;
  height: 1rem;
  color: var(--muted);
}

[data-theme="light"] .theme-switcher__icon:first-child,
[data-theme="dark"] .theme-switcher__icon:last-child {
  color: var(--accent-strong);
}

.theme-switcher__icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.theme-switcher__control {
  position: relative;
  display: inline-flex;
  width: 3.35rem;
  height: 1.95rem;
}

.theme-switcher__control input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: pointer;
  z-index: 2;
}

.theme-switcher__track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(25, 35, 29, 0.16), rgba(25, 35, 29, 0.08));
  box-shadow:
    inset 0 0 0 1px rgba(25, 35, 29, 0.08),
    inset 0 8px 14px rgba(255, 255, 255, 0.18);
  transition:
    background 180ms ease,
    box-shadow 180ms ease;
}

.theme-switcher__thumb {
  position: absolute;
  top: 0.18rem;
  left: 0.18rem;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 999px;
  background: linear-gradient(180deg, #fffdf8, #f1e8d9);
  box-shadow:
    0 6px 14px rgba(37, 31, 21, 0.2),
    inset 0 1px 1px rgba(255, 255, 255, 0.7);
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease;
}

.theme-switcher__control input:checked + .theme-switcher__track {
  background: linear-gradient(180deg, rgba(94, 194, 155, 0.36), rgba(22, 92, 70, 0.78));
  box-shadow:
    inset 0 0 0 1px rgba(94, 194, 155, 0.2),
    inset 0 8px 14px rgba(255, 255, 255, 0.06);
}

.theme-switcher__control input:checked + .theme-switcher__track + .theme-switcher__thumb {
  transform: translateX(1.4rem);
  background: linear-gradient(180deg, #f6faf7, #dcefe6);
  box-shadow:
    0 6px 14px rgba(0, 0, 0, 0.24),
    inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.theme-switcher__control input:focus-visible + .theme-switcher__track {
  box-shadow:
    0 0 0 4px var(--input-focus-ring),
    inset 0 0 0 1px rgba(94, 194, 155, 0.2);
}

[data-theme="dark"] .theme-switcher__track {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.06));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 8px 14px rgba(0, 0, 0, 0.18);
}

[data-theme="dark"] .theme-switcher__thumb {
  background: linear-gradient(180deg, #f6faf7, #dce7e1);
}

.panel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 1.25rem;
}

.panel-grid--tester {
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
}

.panel {
  padding: 1.2rem;
}

.panel--preview {
  position: sticky;
  top: 5.7rem;
  align-self: start;
}

.panel--preview-code {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, transparent), color-mix(in srgb, var(--panel) 98%, transparent));
}

.panel--preview-result {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, transparent), color-mix(in srgb, var(--panel) 98%, transparent));
}

.panel__header,
.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.panel__header {
  margin-bottom: 1rem;
}

.panel__header h2,
.section-title-row h3,
.support-card h3 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.08;
}

.section-title-row p,
.support-card p,
.panel__header p:not(.panel__eyebrow) {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.panel__subtle {
  max-width: 34rem;
  font-size: 0.92rem;
  line-height: 1.55;
}

.panel__section + .panel__section {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.stack-list {
  display: grid;
  gap: 0.9rem;
}

.builder-card {
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--builder-card-bg);
  border: 1px solid var(--builder-card-border);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    0 6px 18px rgba(38, 31, 21, 0.03);
}

.builder-card__header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.9rem;
}

.builder-card__title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.builder-card__title h4 {
  margin: 0;
  font-size: 0.96rem;
}

.builder-card__grid,
.advanced-panel__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

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

.field__label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.86rem;
  font-weight: 700;
}

.tooltip {
  display: inline-grid;
  place-items: center;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 800;
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.65rem);
  transform: translateX(-50%) translateY(6px);
  width: min(260px, 72vw);
  padding: 0.75rem 0.85rem;
  border-radius: 14px;
  background: var(--tooltip-bg);
  color: var(--tooltip-text);
  font-weight: 500;
  font-size: 0.82rem;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 160ms ease,
    transform 160ms ease;
  box-shadow: 0 20px 30px rgba(14, 15, 13, 0.22);
  z-index: 4;
}

.tooltip:hover::after,
.tooltip:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--input-border);
  border-radius: 12px;
  background: var(--input-bg);
  color: var(--ink);
  padding: 0.78rem 0.9rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.24);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    transform 150ms ease;
}

textarea {
  resize: vertical;
  min-height: 8rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.55;
}

.code-input {
  font-family: var(--font-code);
  font-size: 0.92rem;
  line-height: 1.6;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 4px var(--input-focus-ring);
}

.primary-button,
.secondary-button,
.ghost-button,
.file-button,
.danger-button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease,
    background 150ms ease,
    color 150ms ease;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: white;
  box-shadow: 0 10px 20px rgba(22, 92, 70, 0.18);
}

.secondary-button {
  background: color-mix(in srgb, var(--accent-soft) 88%, transparent);
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 10%, transparent);
}

.ghost-button,
.file-button {
  background: var(--button-ghost-bg);
  color: var(--button-ghost-text);
  border-color: var(--builder-card-border);
}

.danger-button {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 10%, transparent);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.file-button:hover,
.danger-button:hover,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.ghost-button:focus-visible,
.file-button:focus-visible,
.danger-button:focus-visible {
  transform: translateY(-1px);
}

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

.info-banner,
.support-card,
.result-card,
.code-card {
  border-radius: var(--radius-sm);
  border: 1px solid var(--builder-card-border);
}

.info-banner {
  padding: 0.82rem 0.95rem;
  background: var(--info-bg);
  color: var(--accent-strong);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.support-card {
  padding: 1rem;
  background: var(--support-bg);
  margin-top: 1rem;
}

.support-card a {
  display: inline-flex;
  align-items: center;
  margin-top: 0.45rem;
  font-weight: 700;
  text-decoration: none;
}

.code-card {
  overflow: auto;
  background: var(--code-bg);
  color: var(--code-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.code-card pre {
  margin: 0;
  padding: 1rem;
  min-height: 23rem;
  font-family: var(--font-code);
  font-size: 0.92rem;
  line-height: 1.65;
}

.result-card {
  min-height: 24rem;
  padding: 1rem;
  background: var(--result-bg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.result-card--empty {
  display: grid;
  place-items: center;
  color: var(--muted);
  text-align: center;
}

.result-card--success {
  background: var(--result-success-bg);
}

.result-card--error {
  background: var(--result-error-bg);
}

.result-card__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.4rem 0.72rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.result-card__status--success {
  background: var(--success-soft);
  color: var(--success);
}

.result-card__status--error {
  background: var(--danger-soft);
  color: var(--danger);
}

.result-card h3,
.result-card h4 {
  margin: 0.9rem 0 0.5rem;
  font-family: var(--font-display);
}

.result-card p,
.result-card li {
  line-height: 1.6;
}

.result-card ul {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
}

.advanced-panel {
  margin-top: 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--advanced-bg);
  overflow: hidden;
}

.advanced-panel summary {
  padding: 0.95rem 1rem;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}

.advanced-panel summary::-webkit-details-marker {
  display: none;
}

.advanced-panel[open] summary {
  border-bottom: 1px solid var(--line);
}

.advanced-panel__grid {
  padding: 1rem;
}

.muted-text {
  color: var(--muted);
  margin: 0.75rem 0 0;
  font-size: 0.92rem;
}

.inline-note {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.56rem;
  border-radius: 999px;
  background: var(--inline-note-bg);
  color: var(--inline-note-text);
  font-size: 0.74rem;
  font-weight: 700;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.pill {
  padding: 0.34rem 0.6rem;
  border-radius: 999px;
  background: var(--pill-bg);
  font-size: 0.84rem;
}

.trace-list,
.action-list {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.8rem;
}

.trace-item,
.action-item {
  padding: 0.72rem 0.82rem;
  border-radius: 14px;
  background: var(--trace-item-bg);
  border: 1px solid var(--builder-card-border);
}

.trace-item--failed {
  background: var(--trace-item-fail-bg);
}

.trace-item--passed {
  background: var(--trace-item-pass-bg);
}

.empty-message {
  color: var(--muted);
  font-style: italic;
}

@media (max-width: 980px) {
  .hero,
  .panel-grid,
  .panel-grid--tester,
  .builder-card__grid,
  .advanced-panel__grid {
    grid-template-columns: 1fr;
  }

  .panel--preview {
    position: static;
  }

  .tabs {
    display: flex;
    justify-content: center;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
    position: static;
    padding: 0.45rem;
  }

  .theme-switcher {
    width: fit-content;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 1rem, 100%);
    padding-top: 0.5rem;
  }

  .hero__copy,
  .panel,
  .hero__card {
    padding: 0.9rem;
    border-radius: 20px;
  }

  .hero {
    gap: 0.8rem;
  }

  .hero__copy h1 {
    max-width: none;
  }

  .panel__header,
  .section-title-row,
  .builder-card__header {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-link {
    flex: 1 1 0;
    text-align: center;
  }

  .theme-switcher {
    width: 100%;
    justify-content: space-between;
  }
}