@font-face {
  font-family: "Bricolage Grotesque";
  src: url("./assets/bricolage-grotesque-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
}
:root {
  color-scheme: light;
  --ink: #202735;
  --ink-deep: #202735;
  --ink-soft: #535969;
  --paper: #fffdf5;
  --paper-light: #ffffff;
  --line: #b9bdc5;
  --gold: #ffdf58;
  --orange: #9e3429;
  --green: #2f642b;
  --red: #a32d2d;
  --display: "Bricolage Grotesque", "Trebuchet MS", sans-serif;
  --body: "Bricolage Grotesque", "Trebuchet MS", sans-serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
}
button,
select,
input,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
}
:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}
.skip-link {
  position: absolute;
  z-index: 20;
  left: 16px;
  top: -80px;
  padding: 12px 16px;
  background: var(--gold);
  color: var(--ink-deep);
  font-weight: 800;
}
.skip-link:focus {
  top: 12px;
}

.app-shell {
  display: grid;
  grid-template-columns: 256px minmax(0, 1fr);
  min-height: 100vh;
}
.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  align-self: start;
  min-height: 100vh;
  padding: 30px 21px 25px;
  background: var(--ink);
  color: #f5f0df;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 5px 26px;
  border-bottom: 1px solid #ffffff32;
}
.brand-mark {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  flex: none;
  border: 2px solid var(--gold);
  border-radius: 12px 4px 12px 4px;
  color: var(--gold);
  font: 800 20px / 1 var(--mono);
  transform: rotate(-5deg);
}
.brand-name {
  font: 600 19px / 0.94 var(--display);
  letter-spacing: -0.03em;
}
.brand-name strong {
  color: var(--gold);
  font-weight: 700;
}
.sidebar-intro {
  margin: 33px 5px 36px;
  color: #e5e9df;
  font: 400 21px / 1.23 var(--display);
  letter-spacing: -0.02em;
}
.sidebar-section-label {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin: 0 5px 13px;
  color: #b4c9c7;
  font: 700 10px / 1.2 var(--mono);
  letter-spacing: 0.13em;
}
.mobile-scroll-hint {
  display: none;
}
.example-list {
  display: grid;
  gap: 8px;
}
.example-button {
  display: grid;
  grid-template-columns: 22px 1fr 16px;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 13px 10px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: #eaf0e8;
  text-align: left;
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    transform 0.18s ease;
}
.example-button:hover {
  border-color: #ffffff42;
  background: #ffffff11;
  transform: translateX(2px);
}
.example-button[aria-current="true"] {
  border-color: var(--gold);
  background: #ffdf5828;
}
.example-number {
  color: var(--gold);
  font: 700 11px var(--mono);
}
.example-title {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.25;
}
.example-arrow {
  color: var(--gold);
  font: 18px var(--display);
}
.sidebar-bottom {
  margin-top: auto;
  padding: 21px 5px 0;
  border-top: 1px solid #ffffff32;
}
.local-indicator {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 700;
}
.local-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #9be4b3;
  box-shadow: 0 0 0 4px #9be4b320;
}
.sidebar-bottom p {
  margin: 10px 0 0;
  color: #abc0bf;
  font: 11px / 1.6 var(--mono);
}

.main-content {
  min-width: 0;
  max-width: 1630px;
  width: 100%;
  margin: 0 auto;
  padding: 0 clamp(24px, 4.6vw, 76px) 35px;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font: 700 10px / 1.3 var(--mono);
  letter-spacing: 0.14em;
}
.topbar-slash {
  margin: 0 8px;
  color: var(--orange);
}
.build-label {
  padding: 8px 10px;
  border: 1px solid #bdc6ba;
  border-radius: 99px;
  white-space: nowrap;
  color: var(--ink);
  font-size: 9px;
}
.hero {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: clamp(33px, 4vw, 62px) 0 clamp(31px, 4vw, 58px);
  overflow: hidden;
}
.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 740px;
}
.eyebrow,
.kicker {
  color: var(--orange);
  font: 800 10px / 1.2 var(--mono);
  letter-spacing: 0.16em;
}
.hero h1 {
  margin: 13px 0 17px;
  color: var(--ink-deep);
  font: 800 clamp(42px, 5.3vw, 78px) / 0.98 var(--display);
  letter-spacing: -0.055em;
}
.hero h1 em {
  color: var(--orange);
  font-weight: 800;
  font-style: normal;
}
.hero p {
  max-width: 580px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.55;
}
.hero-symbol {
  position: absolute;
  right: 15px;
  top: 18px;
  color: #c8e9ff;
  font: 400 clamp(135px, 19vw, 280px) / 1 var(--display);
  letter-spacing: -0.12em;
  transform: rotate(12deg);
  user-select: none;
}
.hero-symbol span {
  color: #ffb8a5;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 18px;
  align-items: stretch;
}
.panel {
  min-width: 0;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: var(--paper-light);
  box-shadow: 4px 4px 0 var(--ink);
}
.editor-panel,
.result-panel {
  display: flex;
  flex-direction: column;
  padding: 24px;
}
.panel-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}
.step-number {
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  flex: none;
  border: 2px solid var(--ink);
  background: #ffed96;
  border-radius: 11px;
  color: var(--ink);
  font: 700 12px var(--mono);
}
.panel-heading .kicker {
  margin: 0 0 2px;
}
.panel-heading h2 {
  margin: 0;
  color: var(--ink-deep);
  font: 800 23px / 1.12 var(--display);
  letter-spacing: -0.035em;
}
.field-label {
  margin: 28px 0 10px;
  color: var(--ink-soft);
  font: 700 11px var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
#rules-input {
  width: 100%;
  flex: 1 0 auto;
  min-height: 275px;
  padding: 18px 18px 18px 20px;
  resize: vertical;
  border: 1px solid #b8c8c4;
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  background: #fffae8;
  color: var(--ink-deep);
  font: 13px / 1.9 var(--mono);
  tab-size: 2;
}
#rules-input::placeholder {
  color: #728785;
  opacity: 1;
}
#rules-input:focus {
  outline: 3px solid #f1bf3980;
  outline-offset: 2px;
}
.recipe-note {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.5;
}
.editor-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 11px 0 20px;
  color: #5b7072;
  font-size: 11px;
  line-height: 1.4;
}
.editor-footer p {
  margin: 0;
}
.editor-footer a {
  color: var(--orange);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
#rule-count {
  flex: none;
  font: 11px var(--mono);
}
.flag-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 17px;
  border: 0;
  margin: 0;
  padding: 0;
  padding-top: 19px;
  border-top: 1px solid var(--line);
}
.flag-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.flag-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.toggle-track {
  width: 31px;
  height: 18px;
  border: 1px solid #9db5af;
  border-radius: 99px;
  background: #d9e4dd;
  transition: background 0.18s ease;
}
.toggle-track::after {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  margin: 2px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 2px #0004;
  transition: transform 0.18s ease;
}
.flag-toggle input:checked + .toggle-track {
  background: var(--ink);
}
.flag-toggle input:checked + .toggle-track::after {
  transform: translateX(13px);
}
.flag-toggle input:focus-visible + .toggle-track {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}
.flag-toggle code {
  padding: 2px 4px;
  border-radius: 3px;
  background: #e9eadd;
  font: 11px var(--mono);
}

.result-panel {
  background: var(--ink-deep);
  border-color: var(--ink-deep);
  color: #ecf0e7;
}
.result-panel :focus-visible {
  outline-color: var(--gold);
}
.result-panel .step-number {
  border-color: var(--ink);
  background: #acd9fa;
  color: var(--ink);
}
.result-panel .panel-heading h2 {
  color: white;
}
.result-panel .kicker {
  color: var(--gold);
}
.result-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin: 29px 0 10px;
  color: #adcbc9;
  font: 700 10px var(--mono);
  letter-spacing: 0.11em;
}
.state-pill {
  padding: 6px 8px;
  border: 1px solid #6d8b88;
  border-radius: 99px;
  color: #d7e5da;
  font-size: 9px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.state-pill[data-state="error"] {
  border-color: #d89880;
  color: #ffd0bd;
}
.state-pill[data-state="success"] {
  border-color: #9cc8aa;
  color: #b8e6c8;
}
.pattern-box {
  display: flex;
  align-items: center;
  min-height: 90px;
  padding: 20px;
  border: 1px solid #668b8b;
  border-radius: 8px;
  background: #151b27;
  overflow-x: auto;
}
#regex-output {
  color: var(--gold);
  font: 600 clamp(16px, 2.2vw, 27px) / 1.35 var(--mono);
  white-space: pre;
}
.result-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 58px;
}
#flags-summary {
  color: #acc4bf;
  font: 11px var(--mono);
}
.copy-button {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 9px 13px;
  border: 1px solid var(--gold);
  border-radius: 6px;
  background: var(--gold);
  color: var(--ink-deep);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
  transition: transform 0.16s ease;
}
.copy-button:hover:not(:disabled) {
  transform: translateY(-2px);
  background: #ffd35f;
}
.copy-button:disabled {
  border-color: #698381;
  background: #49666c;
  color: #c5d1cc;
  cursor: not-allowed;
}
.diagnostic {
  margin: 8px 0 15px;
  padding: 13px 15px;
  border-left: 3px solid #f5ae7e;
  border-radius: 4px;
  background: #5b322d;
  color: #fff0e5;
  font: 12px / 1.5 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.trace-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin: 22px 0 10px;
  padding-top: 20px;
  border-top: 1px solid #6d8784;
}
.trace-heading h3 {
  margin: 0;
  font: 500 19px var(--display);
}
.trace-heading span {
  color: #9cbbb7;
  font: 9px var(--mono);
  letter-spacing: 0.11em;
}
.trace-list {
  display: grid;
  gap: 6px;
  max-height: 270px;
  overflow-y: auto;
  padding-right: 3px;
}
.empty-trace {
  margin: 0;
  color: #a9c0ba;
  font-size: 12px;
  line-height: 1.5;
}
.trace-item {
  display: grid;
  grid-template-columns: minmax(45px, 0.45fr) minmax(0, 1.55fr);
  align-items: start;
  gap: 12px;
  width: 100%;
  padding: 10px;
  border: 1px solid #557676;
  border-radius: 6px;
  background: #303b50;
  color: #e8f0e6;
  text-align: left;
}
.trace-item:hover {
  background: #3d4961;
}
.trace-item:focus-visible {
  outline-offset: -3px;
}
.trace-fragment {
  color: var(--gold);
  font: 700 12px / 1.4 var(--mono);
  overflow-wrap: anywhere;
}
.trace-text {
  display: block;
  margin-bottom: 3px;
  color: #c2d7d0;
  font: 11px / 1.35 var(--mono);
  overflow-wrap: anywhere;
}
.trace-meaning {
  display: block;
  color: #eff5eb;
  font-size: 12px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.examples-panel {
  margin-top: 18px;
  padding: 24px;
}
.examples-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.test-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.test-controls label {
  color: var(--ink-soft);
  font: 700 11px var(--mono);
}
.test-controls select,
.secondary-button {
  min-height: 37px;
  padding: 0 10px;
  border: 1px solid #aebeb9;
  border-radius: 6px;
  background: #fbfbf5;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}
.secondary-button {
  border-color: var(--ink);
  background: var(--ink);
  color: white;
}
.secondary-button:hover {
  background: #3d4961;
}
.diagnostic .secondary-button {
  display: block;
  margin-top: 8px;
}
.examples-intro {
  margin: 14px 0 15px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.45;
}
.test-summary {
  min-height: 33px;
  color: var(--ink-soft);
  font: 700 11px / 1.5 var(--mono);
}
.test-summary[data-state="success"] {
  color: var(--green);
}
.test-summary[data-state="error"] {
  color: var(--red);
}
.test-list {
  display: grid;
  gap: 7px;
}
.test-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 155px minmax(130px, 0.7fr) 34px;
  align-items: center;
  gap: 8px;
  min-height: 53px;
  padding: 8px;
  border: 1px solid var(--line);
  border-left: 3px solid #b5c7ba;
  border-radius: 6px;
  background: #f3f8ff;
}
.test-row[data-result="pass"] {
  border-left-color: var(--green);
}
.test-row[data-result="fail"],
.test-row[data-result="invalid"] {
  border-left-color: var(--red);
}
.test-row textarea,
.test-row select {
  min-width: 0;
  width: 100%;
  min-height: 35px;
  padding: 7px 9px;
  border: 1px solid #c1cfc6;
  border-radius: 4px;
  background: white;
  color: var(--ink);
  font: 12px / 1.3 var(--mono);
}
.test-row textarea {
  resize: vertical;
}
.test-result {
  color: var(--ink-soft);
  font: 11px / 1.35 var(--mono);
  overflow-wrap: anywhere;
}
.test-row[data-result="pass"] .test-result {
  color: var(--green);
}
.test-row[data-result="fail"] .test-result,
.test-row[data-result="invalid"] .test-result {
  color: var(--red);
}
.remove-example {
  width: 32px;
  height: 32px;
  border: 1px solid #cbd1c6;
  border-radius: 4px;
  background: transparent;
  color: var(--ink-soft);
  font: 20px / 1 var(--body);
}
.remove-example:hover {
  border-color: var(--red);
  color: var(--red);
}
.footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 28px;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 11px;
}
.footer a {
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: 215px minmax(0, 1fr);
  }
  .sidebar {
    padding: 22px 14px;
  }
  .workbench {
    grid-template-columns: 1fr;
  }
  .trace-list {
    max-height: 320px;
  }
}
@media (max-width: 760px) {
  .app-shell {
    display: block;
  }
  .sidebar {
    position: static;
    min-height: 0;
    padding: 18px 20px;
  }
  .brand {
    padding: 0 0 14px;
  }
  .brand-mark {
    width: 37px;
    height: 37px;
    font-size: 16px;
  }
  .brand-name {
    font-size: 16px;
  }
  .sidebar-intro,
  .sidebar-bottom {
    display: none;
  }
  .sidebar-section-label {
    margin: 12px 0 0;
  }
  .sidebar-count {
    display: none;
  }
  .mobile-scroll-hint {
    display: inline;
  }
  .example-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-top: 12px;
  }
  .example-button {
    display: inline-flex;
    width: auto;
    min-width: 190px;
    padding: 9px;
    border-color: #ffffff33;
  }
  .example-arrow {
    margin-left: auto;
  }
  .main-content {
    padding: 0 18px 28px;
  }
  .topbar {
    min-height: 49px;
    font-size: 9px;
  }
  .hero {
    padding: 29px 0 28px;
  }
  .hero h1 {
    font-size: clamp(40px, 11vw, 62px);
  }
  .hero-symbol {
    right: -11px;
    top: 31px;
    font-size: 120px;
    opacity: 0.6;
  }
  .panel {
    border-radius: 10px;
  }
  .editor-panel,
  .result-panel,
  .examples-panel {
    padding: 18px;
  }
  .test-row {
    grid-template-columns: minmax(0, 1fr) 124px 30px;
  }
  .test-result {
    grid-column: 1 / -1;
    grid-row: 2;
    padding-left: 2px;
  }
  .remove-example {
    grid-column: 3;
    grid-row: 1;
  }
}
@media (max-width: 450px) {
  .topbar {
    flex-wrap: wrap;
    gap: 4px;
    padding: 10px 0;
  }
  .build-label {
    padding: 4px 7px;
    font-size: 8px;
  }
  .hero-symbol {
    display: none;
  }
  .panel-heading h2 {
    font-size: 21px;
  }
  .flag-controls {
    display: grid;
  }
  .examples-heading {
    align-items: flex-start;
  }
  .test-controls {
    width: 100%;
  }
  .test-row {
    grid-template-columns: minmax(0, 1fr) 30px;
  }
  .test-row select {
    grid-column: 1;
    grid-row: 2;
  }
  .test-result {
    grid-row: 3;
  }
  .remove-example {
    grid-column: 2;
    grid-row: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}