:root {
  --ink: #071b24;
  --ink-2: #0d2a35;
  --paper: #f4f7f2;
  --paper-2: #e9efe9;
  --white: #ffffff;
  --line: #cbd6d1;
  --muted: #5c6e70;
  --cyan: #46d6c8;
  --lime: #c9f45a;
  --orange: #ff875b;
  --blue: #45a9ff;
  --shadow: 0 24px 70px rgba(7, 27, 36, 0.12);
  --radius: 1.25rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  word-break: keep-all;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 1rem;
  transform: translateY(-150%);
  border-radius: 0.5rem;
  background: var(--lime);
  color: var(--ink);
  font-weight: 800;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: absolute;
  z-index: 20;
  top: 0;
  left: 50%;
  display: flex;
  flex-wrap: wrap;
  width: min(100% - 3rem, 1240px);
  min-height: 5.75rem;
  padding-block: 0.9rem;
  gap: 0.8rem 1rem;
  align-items: center;
  justify-content: space-between;
  transform: translateX(-50%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.17);
  color: var(--white);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-size: 1.08rem;
  font-weight: 850;
  letter-spacing: -0.035em;
  white-space: nowrap;
}

.brand-wordmark {
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-prefix {
  font-size: 0.875rem;
  font-weight: 650;
  opacity: 0.75;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.brand-mark::before {
  width: 0.22rem;
  height: 0.72rem;
  border-radius: 1rem;
  background: currentColor;
  content: "";
  transform: translate(0.18rem, -0.04rem) rotate(42deg);
  transform-origin: 50% 100%;
}

.brand-mark i {
  position: absolute;
  bottom: 0.35rem;
  left: 50%;
  width: 1.12rem;
  height: 0.56rem;
  transform: translateX(-50%);
  border: solid currentColor;
  border-width: 2px 2px 0;
  border-radius: 1rem 1rem 0 0;
}

.site-header nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.4rem);
}

.site-header nav a {
  position: relative;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a::after {
  position: absolute;
  right: 0;
  bottom: -0.35rem;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  background: var(--lime);
  content: "";
  transition: transform 180ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: var(--white);
}

.site-header nav a:hover::after,
.site-header nav a:focus-visible::after {
  transform: scaleX(1);
}

.intro {
  position: relative;
  display: grid;
  min-height: 760px;
  padding: 9.5rem max(1.5rem, calc((100vw - 1240px) / 2)) 5rem;
  grid-template-columns: minmax(0, 1.15fr) minmax(24rem, 0.85fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
}

.intro::before {
  position: absolute;
  top: -26rem;
  left: 42%;
  width: 54rem;
  height: 54rem;
  border: 1px solid rgba(70, 214, 200, 0.22);
  border-radius: 50%;
  box-shadow: 0 0 0 5rem rgba(70, 214, 200, 0.03), 0 0 0 10rem rgba(70, 214, 200, 0.025);
  content: "";
}

.intro::after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 7px;
  background: linear-gradient(90deg, var(--cyan) 0 29%, var(--lime) 29% 55%, var(--orange) 55% 72%, var(--blue) 72% 100%);
  content: "";
}

.intro-copy,
.field-card {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 1.2rem;
  color: #2e666b;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.intro .eyebrow,
.inverse .eyebrow,
.trouble-intro .eyebrow {
  color: var(--cyan);
}

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

h1 {
  max-width: 760px;
  margin-bottom: 1.7rem;
  font-size: clamp(3.4rem, 6.6vw, 6.25rem);
  font-weight: 850;
  letter-spacing: -0.075em;
  line-height: 0.98;
}

h1 em {
  position: relative;
  color: var(--lime);
  font-style: normal;
}

h1 em::after {
  position: absolute;
  right: 0.05em;
  bottom: -0.04em;
  left: 0.05em;
  height: 0.07em;
  background: currentColor;
  content: "";
}

.lede {
  max-width: 38rem;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: clamp(1rem, 1.3vw, 1.18rem);
}

.field-card {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 1.4rem;
  background: rgba(10, 38, 48, 0.78);
  box-shadow: 0 32px 70px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
}

.field-card-head {
  display: flex;
  padding: 1.25rem 1.45rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.85rem;
}

.field-card-head strong {
  color: var(--lime);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.06em;
}

.field-card ol {
  margin: 0;
  padding: 0.4rem 1.45rem 0.75rem;
  list-style: none;
}

.field-card li {
  display: grid;
  padding: 0.8rem 0;
  grid-template-columns: 2.25rem 1fr;
  column-gap: 0.7rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
}

.field-card li:last-child {
  border-bottom: 0;
}

.field-card li span {
  grid-row: 1 / 3;
  color: var(--cyan);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 800;
}

.field-card li b {
  font-size: 0.96rem;
}

.field-card li small {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.78rem;
}

.knowledge,
.routine,
.troubleshooting {
  padding: clamp(5rem, 8vw, 8rem) max(1.5rem, calc((100vw - 1240px) / 2));
}

.section-heading {
  display: flex;
  margin-bottom: 2.2rem;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.section-heading h2,
.trouble-intro h2 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4.2vw, 4rem);
  letter-spacing: -0.065em;
  line-height: 1.05;
}

.section-heading > p {
  max-width: 25rem;
  margin-bottom: 0.3rem;
  color: var(--muted);
  text-align: right;
}

.parameter-tabs {
  display: grid;
  margin-bottom: 1rem;
  grid-template-columns: repeat(6, 1fr);
  border: solid var(--line);
  border-width: 1px 0 0 1px;
}

.parameter-tab {
  position: relative;
  min-height: 7rem;
  padding: 1rem;
  border: solid var(--line);
  border-width: 0 1px 1px 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
  transition: color 160ms ease, background 160ms ease;
}

.parameter-tab .tab-code {
  display: block;
  margin-bottom: 1.15rem;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 1.25rem;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.parameter-tab .tab-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.83rem;
  font-weight: 700;
}

.parameter-tab .tab-label::after {
  content: "+";
  font-size: 1rem;
  font-weight: 400;
}

.parameter-tab:hover {
  background: var(--white);
  color: var(--ink);
}

.parameter-tab:focus-visible,
.symptom-tab:focus-visible {
  z-index: 2;
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.parameter-tab[aria-selected="true"] {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.74);
}

.parameter-tab[aria-selected="true"]::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 5px;
  background: var(--parameter-accent, var(--cyan));
  content: "";
}

.parameter-tab[aria-selected="true"] .tab-code {
  color: var(--parameter-accent, var(--lime));
}

.parameter-tab[aria-selected="true"] .tab-label::after {
  content: "−";
}

.parameter-panel {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.parameter-hero {
  display: grid;
  padding: clamp(2rem, 4.5vw, 4rem);
  grid-template-columns: minmax(0, 1.35fr) minmax(15rem, 0.65fr);
  gap: 4rem;
  border-bottom: 1px solid var(--line);
}

.parameter-title-row {
  display: flex;
  margin-bottom: 1rem;
  align-items: center;
  gap: 1rem;
}

.parameter-number {
  display: inline-grid;
  min-width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border-radius: 50%;
  background: var(--active-accent, var(--cyan));
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.74rem;
  font-weight: 900;
}

.parameter-title-row h3 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 3.7rem);
  letter-spacing: -0.065em;
  line-height: 1;
}

.parameter-summary {
  max-width: 45rem;
  margin-bottom: 0;
  color: #344c50;
  font-size: 1.06rem;
}

.spec-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-content: center;
  border: 1px solid var(--line);
}

.spec-stack div {
  min-height: 5.5rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.spec-stack div:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.spec-stack div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.spec-stack small,
.detail-card small,
.diagnostic-priority small {
  display: block;
  margin-bottom: 0.32rem;
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.spec-stack strong {
  font-size: 0.92rem;
}

.parameter-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.detail-card {
  min-height: 17rem;
  padding: clamp(1.7rem, 3vw, 2.7rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.detail-card:nth-child(even) {
  border-right: 0;
}

.detail-card:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.detail-card h4 {
  margin: 0 0 0.85rem;
  font-size: 1.2rem;
  letter-spacing: -0.035em;
}

.detail-card p {
  margin-bottom: 0;
  color: #4c6163;
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.65rem;
  color: #384f52;
}

.check-list li::before {
  position: absolute;
  top: 0.68rem;
  left: 0;
  display: grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--active-accent, var(--cyan)) 25%, white);
  color: var(--ink);
  content: "✓";
  font-size: 0.62rem;
  font-weight: 900;
}

.routine {
  background: var(--ink-2);
  color: var(--white);
}

.inverse > p {
  color: rgba(255, 255, 255, 0.6);
}

.routine-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: solid rgba(255, 255, 255, 0.16);
  border-width: 1px 0 0 1px;
}

.routine-grid article {
  min-height: 18rem;
  padding: 1.8rem;
  border: solid rgba(255, 255, 255, 0.16);
  border-width: 0 1px 1px 0;
}

.routine-grid span {
  display: block;
  margin-bottom: 5rem;
  color: var(--lime);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 800;
}

.routine-grid h3 {
  margin-bottom: 0.7rem;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
}

.routine-grid p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.92rem;
}

.troubleshooting {
  display: grid;
  grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1.3fr);
  align-items: start;
  gap: clamp(3rem, 7vw, 7rem);
}

.trouble-intro {
  position: sticky;
  top: 2rem;
}

.trouble-intro h2 {
  margin-bottom: 1.25rem;
}

.trouble-intro > p:last-child {
  max-width: 27rem;
  color: var(--muted);
}

.diagnostic-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
}

.symptom-tabs {
  display: grid;
  padding: 0.8rem;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}

.symptom-tab {
  min-height: 3.3rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid transparent;
  border-radius: 0.7rem;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 750;
  text-align: left;
}

.symptom-tab:hover {
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink);
}

.symptom-tab[aria-selected="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.diagnostic-result {
  padding: clamp(1.7rem, 4vw, 3rem);
}

.diagnostic-result h3 {
  margin-bottom: 0.45rem;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  letter-spacing: -0.05em;
}

.diagnostic-result > p {
  margin-bottom: 2rem;
  color: var(--muted);
}

.diagnostic-priorities {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.diagnostic-priority {
  display: grid;
  padding: 1.15rem 0;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.8rem;
  border-bottom: 1px solid var(--line);
}

.diagnostic-priority > span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
}

.diagnostic-priority p {
  margin: 0;
  color: #40575a;
}

.diagnostic-note {
  margin: 1.5rem 0 0;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--orange);
  background: #fff4ef;
  color: #6b4031;
  font-size: 0.9rem;
}

footer {
  display: grid;
  padding: 3rem max(1.5rem, calc((100vw - 1240px) / 2));
  grid-template-columns: 1fr 2fr auto;
  align-items: center;
  gap: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--ink);
  color: var(--white);
}

.footer-brand {
  color: var(--white);
}

footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.78rem;
}

footer > a {
  color: var(--lime);
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

@media (max-width: 980px) {
  .intro {
    min-height: auto;
    padding-top: 9rem;
    grid-template-columns: 1fr;
  }

  .intro-copy {
    padding-top: 2rem;
  }

  .field-card {
    max-width: 42rem;
  }

  .parameter-tabs {
    grid-template-columns: repeat(3, 1fr);
  }

  .parameter-hero {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .routine-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .routine-grid article {
    min-height: 15rem;
  }

  .routine-grid span {
    margin-bottom: 3.5rem;
  }

  .troubleshooting {
    grid-template-columns: 1fr;
  }

  .trouble-intro {
    position: static;
  }

  footer {
    grid-template-columns: 1fr auto;
  }

  footer p {
    grid-row: 2;
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  body {
    word-break: normal;
  }

  .site-header {
    width: calc(100% - 2rem);
    min-height: 4.8rem;
  }

  .site-header nav {
    gap: 1rem;
  }

  .site-header nav a {
    font-size: 0.78rem;
  }

  .site-header nav a:first-child {
    display: none;
  }

  .intro {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.5rem);
  }

  .field-card ol {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .section-heading {
    display: block;
  }

  .section-heading > p {
    margin-top: 1rem;
    text-align: left;
  }

  .parameter-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

  .parameter-tab {
    min-height: 6.3rem;
  }

  .parameter-hero {
    padding: 1.5rem;
  }

  .parameter-details {
    grid-template-columns: 1fr;
  }

  .detail-card,
  .detail-card:nth-child(even),
  .detail-card:nth-last-child(-n + 2) {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .detail-card:last-child {
    border-bottom: 0;
  }

  .routine-grid {
    grid-template-columns: 1fr;
  }

  .routine-grid article {
    min-height: auto;
  }

  .routine-grid span {
    margin-bottom: 2rem;
  }

  .symptom-tabs {
    grid-template-columns: 1fr;
  }

  footer {
    gap: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.site-header nav { flex-wrap: wrap; }
.question-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 2rem; margin-top: 1.5rem; padding: 1rem 1.3rem; border: 1px solid var(--lime); border-radius: 0.7rem; color: var(--lime); font-weight: 750; text-decoration: none; }
.question-link:hover, .question-link:focus-visible { background: var(--lime); color: var(--ink); }
.application-guide, .ion-section, .inquiry-section { padding: 5rem max(1.5rem, calc((100vw - 1240px) / 2)); scroll-margin-top: 1rem; }
.application-guide { background: var(--paper-2); }
.ion-section { background: var(--white); }
.guide-lead { max-width: 68rem; margin: 0 0 1.8rem; font-size: 1.05rem; }
.guide-callout { padding: 1.2rem 1.5rem; margin: 1.5rem 0; background: #e0ebe6; border-left: 4px solid #23716a; border-radius: 0.4rem; }
.guide-callout p { margin: 0.5rem 0 0; }
.table-scroll { overflow-x: auto; margin: 2rem 0; }
.guide-table { width: 100%; min-width: 660px; border-collapse: collapse; background: var(--white); font-size: 1rem; text-align: left; }
.guide-table caption { text-align: left; font-weight: 750; margin-bottom: 1rem; }
.guide-table th, .guide-table td { padding: 1rem 1.1rem; border: 1px solid var(--line); vertical-align: top; }
.guide-table thead { background: var(--ink); color: var(--white); }
.guide-table tbody th { width: 20%; }
.guide-table td:nth-child(2) { width: 25%; }
.guide-columns, .ion-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.guide-columns h3, .inquiry-help h3 { margin-top: 0; font-size: 1.25rem; }
.guide-columns ol { padding-left: 1.3rem; }
.guide-columns li { margin-bottom: 0.5rem; }
.guide-sources { margin: 1.5rem 0 0; color: var(--muted); font-size: 0.875rem; overflow-wrap: anywhere; }
.guide-sources a { text-underline-offset: 0.2em; }
.text-link { font-size: 1rem; font-weight: 750; color: #12645d; text-underline-offset: 0.3em; }
.parameter-action { padding: 0 2rem 1.5rem; margin: 0; }
.ion-card { padding: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.ion-heading { display: flex; align-items: center; gap: 1.2rem; }
.ion-heading .eyebrow { margin: 0 0 0.3rem; }
.ion-heading h3 { margin: 0; font-size: 1.6rem; }
.ion-symbol { display: inline-grid; place-items: center; flex: 0 0 4rem; width: 4rem; height: 4rem; background: var(--ink); color: var(--cyan); border-radius: 1rem; font-size: 2rem; font-weight: 800; }
.ion-symbol.chloride { color: var(--lime); }
.ion-card dt { margin-top: 1.2rem; font-weight: 800; }
.ion-card dd { margin: 0.3rem 0 1rem; }
.inquiry-layout { display: grid; grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.8fr); gap: 3rem; align-items: start; }
.inquiry-help { padding: 1.8rem; background: var(--ink); color: var(--white); border-radius: var(--radius); }
.inquiry-help p { color: #c3d3d4; }
.flow-link { display: block; margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #426069; color: var(--lime); font-weight: 750; text-underline-offset: 0.25em; }
.help-small { font-size: 0.875rem; color: var(--muted); margin-top: 0.5rem; }
.inquiry-surface { min-width: 0; padding: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
#inquiry-form label:not(.consent-label) { display: block; margin: 1rem 0 0.5rem; font-size: 1rem; font-weight: 750; }
#inquiry-form > label:first-child { margin-top: 0; }
#inquiry-form label span { font-size: 0.875rem; font-weight: 450; color: var(--muted); }
#inquiry-form input:not([type="checkbox"]):not([type="hidden"]), #inquiry-form select, #inquiry-form textarea { width: 100%; min-height: 3rem; padding: 0.75rem 0.85rem; border: 1px solid #a8b8b2; border-radius: 0.5rem; background: var(--white); color: var(--ink); font: inherit; line-height: 1.5; }
#inquiry-form textarea { resize: vertical; }
#inquiry-form :is(input, select, textarea, button):focus-visible, .question-link:focus-visible { outline: 3px solid #278b80; outline-offset: 3px; }
#inquiry-fields { padding: 0; margin: 0; border: 0; min-width: 0; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1.25rem; }
.form-notice { margin-top: 1.1rem; padding: 0.9rem 1rem; background: #fff2d4; color: #674000; border-radius: 0.5rem; font-size: 0.95rem; }
.form-error { padding: 0.8rem 1rem; border-left: 4px solid #b33a2d; background: #fff0ed; color: #922519; overflow-wrap: anywhere; }
.consent-label { display: flex; gap: 0.8rem; align-items: flex-start; margin-top: 1.5rem; }
.consent-label input { width: 1.2rem; height: 1.2rem; flex-shrink: 0; margin-top: 0.15rem; accent-color: #16695e; }
#inquiry-form .consent-label span { color: var(--ink); font-size: 0.95rem; }
.submit-button { min-height: 3.1rem; padding: 0.8rem 1.5rem; border: 0; border-radius: 0.6rem; background: var(--ink); color: var(--white); font-weight: 750; cursor: pointer; }
.submit-button:disabled { opacity: 0.45; cursor: not-allowed; }
.file-list { padding: 0; list-style: none; font-size: 0.875rem; }
.file-list li { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.55rem 0; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.file-list button { flex-shrink: 0; padding: 0.3rem 0.55rem; border: 1px solid var(--line); border-radius: 0.3rem; background: var(--white); cursor: pointer; }
.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.inquiry-result { padding: 1rem 0; overflow-wrap: anywhere; }
.inquiry-result h3 { font-size: 1.5rem; }
@media (max-width: 980px) { .inquiry-layout { grid-template-columns: 1fr; gap: 1.5rem; } }
@media (max-width: 680px) {
  .site-header nav { column-gap: 1rem; row-gap: 0.4rem; }
  .site-header nav a { font-size: 0.875rem; }
  .application-guide, .ion-section, .inquiry-section { padding: 3.5rem 1rem; }
  .guide-columns, .ion-grid, .form-grid { grid-template-columns: 1fr; }
  .ion-card, .inquiry-surface { padding: 1.25rem; }
  .question-link { max-width: 100%; gap: 1rem; font-size: 0.95rem; }
}