:root {
  color-scheme: light;
  --ink: #17212f;
  --muted: #5f6b7a;
  --soft: #eef3f8;
  --paper: #ffffff;
  --line: #d9e1ea;
  --navy: #102033;
  --blue: #2563eb;
  --teal: #0f766e;
  --gold: #b7791f;
  --red: #b42318;
  --green: #0f8a4b;
  --shadow: 0 18px 45px rgba(16, 32, 51, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #f7fafc;
  line-height: 1.55;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(217, 225, 234, 0.86);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand > span:last-child,
.hero-copy,
.pipeline-visual,
.tool-form,
.result-panel,
.term-output {
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  background: var(--navy);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  overflow-wrap: anywhere;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  min-width: 0;
}

.nav a,
.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 700;
  padding: 10px 12px;
}

.nav a:hover,
.icon-link:hover {
  background: var(--soft);
  color: var(--ink);
}

.header-actions,
.hero-actions,
.button-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-weight: 800;
  text-align: center;
  white-space: normal;
}

.hero-actions .button {
  min-width: 176px;
}

.button-primary {
  color: #fff;
  background: var(--blue);
}

.button-primary:hover {
  background: #1d4ed8;
}

.button-secondary {
  color: var(--ink);
  border-color: var(--line);
  background: var(--paper);
}

.button-secondary:hover {
  background: var(--soft);
}

.section,
.section-band {
  padding: clamp(54px, 7vw, 96px) clamp(18px, 5vw, 72px);
}

.section-band {
  background: var(--paper);
}

.section-tight {
  padding-top: 22px;
  padding-bottom: 22px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
  min-height: min(760px, calc(100vh - 120px));
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.77rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  max-width: 860px;
  font-size: clamp(2.4rem, 6vw, 5.3rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.lead {
  max-width: 740px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.pipeline-visual {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: #f8fbff;
  box-shadow: var(--shadow);
}

.visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.visual-header strong {
  color: var(--green);
}

.pipeline-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
  min-height: 94px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #fff;
}

.pipeline-step span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  background: var(--navy);
  font-weight: 900;
}

.pipeline-step small {
  display: block;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.impact-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  background: #ecf4ef;
}

.summary-card,
.feature-grid article,
.principles-list article,
.privacy-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.summary-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px;
}

.summary-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.metric {
  color: var(--blue);
  font-size: 2rem;
  font-weight: 900;
}

.section-heading {
  max-width: 900px;
  margin-bottom: 28px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-grid,
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article,
.privacy-grid article {
  min-height: 174px;
  padding: 20px;
}

.feature-grid p,
.privacy-grid p {
  color: var(--muted);
}

.tools-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #f1f5f9;
}

.tool-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.tool-tab {
  flex: 1 0 150px;
  min-width: max-content;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--muted);
  background: var(--paper);
  font-weight: 900;
}

.tool-tab.active {
  color: #fff;
  border-color: var(--navy);
  background: var(--navy);
}

.tool-panel {
  display: none;
}

.tool-panel.active {
  display: block;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(360px, 1.05fr);
  gap: 18px;
  align-items: start;
}

.tool-form,
.result-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
  background: var(--paper);
  box-shadow: 0 12px 30px rgba(16, 32, 51, 0.06);
}

.tool-form p,
.result-panel p,
.field-note,
.callout,
.result-card,
.history-item,
.term-output {
  overflow-wrap: anywhere;
}

.tool-form label,
.lead-box label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 800;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid #cdd7e3;
  border-radius: var(--radius);
  padding: 11px 12px;
  color: var(--ink);
  background: #fff;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 3px solid rgba(37, 99, 235, 0.16);
  border-color: var(--blue);
}

.field-note {
  margin: 8px 0 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.step-indicator {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

.step-indicator span {
  display: grid;
  min-height: 34px;
  place-items: center;
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--soft);
  font-weight: 900;
}

.step-indicator span.active,
.step-indicator span.done {
  color: #fff;
  background: var(--blue);
}

.patent-step {
  display: none;
}

.patent-step.active {
  display: block;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.option-stack {
  display: grid;
  gap: 10px;
  margin: 16px 0;
}

.option-grid label,
.option-stack label {
  display: flex;
  min-height: 58px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fbfdff;
  font-weight: 700;
}

.option-grid input,
.option-stack input {
  width: auto;
}

.inline-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.tag-row,
.prompt-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.tag-row span,
.prompt-row button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
  background: #f8fbff;
  color: var(--ink);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.tag-row button {
  margin-left: 8px;
  border: 0;
  color: var(--red);
  background: transparent;
  font-weight: 900;
}

.score-large {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 14px 0;
  color: var(--blue);
  font-size: 4.8rem;
  font-weight: 900;
  line-height: 1;
}

.score-large small {
  color: var(--muted);
  font-size: 1.2rem;
}

.confidence {
  display: flex;
  gap: 6px;
  margin: 12px 0 20px;
}

.confidence span {
  width: 18px;
  height: 18px;
  border-radius: 99px;
  background: #dce5ef;
}

.confidence span.filled {
  background: var(--green);
}

.result-list,
.score-bars,
.history-list,
.mini-stats {
  display: grid;
  gap: 10px;
  margin: 14px 0;
}

.result-card,
.history-item,
.mini-stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fbfdff;
}

.result-card strong,
.history-item strong {
  display: block;
}

.result-card small {
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
}

.callout {
  border-radius: var(--radius);
  padding: 14px;
  margin: 16px 0;
  font-weight: 700;
}

.warning {
  color: #713f12;
  background: #fef3c7;
}

.lead-box {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.span-2 {
  grid-column: 1 / -1;
}

.settings-box {
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #fbfdff;
}

.settings-box summary {
  font-weight: 900;
}

.slider-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.score-bar {
  display: grid;
  gap: 6px;
}

.score-bar div {
  height: 12px;
  overflow: hidden;
  border-radius: 99px;
  background: #e2e8f0;
}

.score-bar span {
  display: block;
  height: 100%;
  background: var(--teal);
}

.term-output {
  max-height: 540px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #fbfdff;
}

.term-output:empty {
  display: none;
}

.term-output h4,
.term-output h5 {
  margin: 14px 0 6px;
}

.term-output ul,
.term-output ol {
  padding-left: 20px;
}

.mini-stats {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini-stat {
  text-align: center;
}

.mini-stat span {
  display: block;
  color: var(--blue);
  font-size: 1.35rem;
  font-weight: 900;
}

.history-panel {
  margin-top: 20px;
}

.principles-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.principles-list article {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 8px 14px;
  min-height: 154px;
  padding: 16px;
}

.principles-list span {
  grid-row: span 2;
  color: var(--gold);
  font-weight: 900;
}

.principles-list p {
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 5vw, 72px);
  color: #dbeafe;
  background: var(--navy);
}

.site-footer p {
  margin: 6px 0 0;
  color: #a8bed4;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.footer-links a {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  padding: 8px 10px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  max-width: min(420px, calc(100vw - 36px));
  transform: translateY(20px);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: #fff;
  background: var(--navy);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.active {
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 1180px) {
  html {
    scroll-padding-top: 156px;
  }

  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 16px;
  }

  .brand {
    min-width: 0;
  }

  .nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: thin;
  }

  .nav a {
    flex: 0 0 auto;
  }
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: 1fr;
  }

  .header-actions,
  .nav {
    justify-content: flex-start;
  }

  .hero,
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .principles-list,
  .privacy-grid,
  .impact-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  html {
    scroll-padding-top: 206px;
  }

  .section,
  .section-band {
    padding: 42px 16px;
  }

  .hero {
    min-height: auto;
    gap: 26px;
    padding-top: 34px;
  }

  h1 {
    font-size: clamp(2rem, 12vw, 3rem);
    line-height: 1.05;
  }

  h2 {
    font-size: clamp(1.75rem, 9vw, 2.45rem);
  }

  .lead {
    font-size: 1rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand small {
    display: none;
  }

  .header-actions,
  .hero-actions,
  .button-row {
    align-items: stretch;
    justify-content: stretch;
  }

  .header-actions .button,
  .hero-actions .button,
  .button-row .button {
    flex: 1 1 160px;
  }

  .feature-grid,
  .principles-list,
  .privacy-grid,
  .impact-summary,
  .option-grid,
  .form-grid,
  .slider-grid,
  .mini-stats {
    grid-template-columns: 1fr;
  }

  .inline-field {
    grid-template-columns: 1fr;
  }

  .inline-field .button,
  .tool-form > .button,
  .lead-box .button {
    width: 100%;
  }

  .pipeline-visual,
  .tool-form,
  .result-panel {
    padding: 16px;
  }

  .pipeline-step {
    grid-template-columns: 42px minmax(0, 1fr);
    min-height: auto;
    padding: 12px;
  }

  .pipeline-step span {
    width: 34px;
    height: 34px;
  }

  .tool-tabs {
    gap: 6px;
    margin-inline: -16px;
    padding-inline: 16px;
  }

  .tool-tab {
    flex-basis: 44%;
    padding: 11px 12px;
  }

  .score-large {
    font-size: clamp(3.1rem, 18vw, 4.2rem);
  }

  .span-2 {
    grid-column: auto;
  }

  .site-footer {
    display: grid;
  }
}

@media (max-width: 460px) {
  .site-header {
    padding-inline: 12px;
  }

  .brand strong {
    font-size: 0.96rem;
  }

  .icon-link,
  .nav a {
    padding: 9px 10px;
  }

  .header-actions > * {
    flex: 1 1 100%;
  }

  .tool-tab {
    flex-basis: 78%;
  }

  .prompt-row button,
  .tag-row span {
    width: 100%;
  }
}