:root {
  --ink: #172019;
  --green: #1f5a38;
  --green-dark: #15432a;
  --sage: #b9c9b4;
  --sage-soft: #eef3ea;
  --cream: #fbf8ef;
  --paper: #fffefb;
  --white: #ffffff;
  --line: #d6ddd3;
  --muted: #657067;
  --coral: #d76f57;
  --coral-soft: #fff1ec;
  --gold: #e4b65d;
  --shadow: 0 18px 54px rgba(28, 67, 42, 0.1);
  --sans: "Helvetica Neue", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  --display: "Zen Maru Gothic", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea {
  font: inherit;
}

button,
a,
label,
summary {
  -webkit-tap-highlight-color: transparent;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 8px 14px;
  color: var(--white);
  background: var(--green);
  transform: translateY(-160%);
}

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

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.section-shell,
.tool-header {
  width: min(1180px, calc(100% - 80px));
  margin-inline: auto;
}

.tool-header {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.tool-header p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.tool-brand {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
}

.hero {
  min-height: 700px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  gap: clamp(48px, 7vw, 94px);
  align-items: center;
  padding-block: clamp(78px, 8vw, 126px);
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.hero h1,
.form-heading h2,
.promise h2,
.result-heading h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(44px, 4.7vw, 68px);
  line-height: 1.38;
}

.hero-lead {
  max-width: 680px;
  margin: 28px 0 34px;
  font-size: clamp(18px, 1.7vw, 21px);
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions .primary-button,
.hero-actions .secondary-button {
  min-width: 220px;
}

.primary-button,
.secondary-button,
.copy-button {
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 46px;
  padding: 0 30px;
  border: 1px solid var(--green);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: 0.04em;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.primary-button {
  color: var(--white);
  background: var(--green);
}

.primary-button:hover,
.copy-button:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
}

.hero-side {
  display: grid;
  gap: 20px;
}

.editorial-figure {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 82% 18%, rgba(228, 182, 93, 0.24), transparent 30%),
    linear-gradient(145deg, #f2f6ed, #fbf8ef);
  box-shadow: var(--shadow);
}

.editorial-figure img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 3 / 2;
  object-fit: contain;
}

.editorial-figure figcaption {
  padding: 12px 18px 14px;
  border-top: 1px solid rgba(31, 90, 56, 0.12);
  color: var(--green-dark);
  background: rgba(255, 254, 251, 0.88);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.hero-figure {
  transform: rotate(1deg);
}

.hero-map {
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    radial-gradient(circle at 78% 14%, rgba(228, 182, 93, 0.2), transparent 31%),
    linear-gradient(145deg, #f3f7ef, #fbf8ef);
  box-shadow: var(--shadow);
}

.map-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  column-gap: 18px;
  align-items: center;
}

.map-step > span {
  width: 44px;
  height: 44px;
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 17px;
  font-weight: 800;
}

.map-step strong {
  font-size: 19px;
  line-height: 1.4;
}

.map-step small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.map-line {
  width: 1px;
  height: 28px;
  margin: 4px 0 4px 22px;
  background: var(--sage);
}

.promise,
.learning {
  padding-block: clamp(76px, 9vw, 124px);
}

.promise {
  border-top: 1px solid var(--line);
}

.promise h2,
.form-heading h2,
.result-heading h2 {
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.5;
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 52px;
}

.promise-grid article {
  min-height: 260px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}

.promise-grid article > span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-weight: 800;
}

.promise-grid h3 {
  margin: 28px 0 12px;
  font-size: 22px;
}

.promise-grid p,
.form-heading > p:last-child,
.requirements-heading > p,
.prompt-help {
  color: var(--muted);
}

.promise-grid p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}

.guide-form {
  padding-block: clamp(80px, 10vw, 132px);
  border-top: 1px solid var(--line);
}

.form-heading {
  max-width: 840px;
  margin-bottom: 54px;
}

.form-heading > p:last-child {
  margin: 18px 0 0;
}

.question-card {
  min-width: 0;
  margin: 0 0 28px;
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
  box-shadow: 0 9px 30px rgba(28, 67, 42, 0.05);
}

.question-card legend {
  padding: 0 10px 0 0;
  font-size: clamp(21px, 2.2vw, 28px);
  font-weight: 800;
  line-height: 1.55;
}

.question-card legend span {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  margin-right: 12px;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 16px;
  vertical-align: 2px;
}

.question-help,
.question-note {
  margin: 8px 0 24px;
  color: var(--muted);
  font-size: 16px;
}

.question-note {
  margin: 20px 0 0;
}

.optional-details {
  display: grid;
  gap: 7px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.optional-details strong {
  font-size: 17px;
}

.optional-details span {
  color: var(--muted);
  font-size: 15px;
}

.optional-details textarea {
  width: 100%;
  margin-top: 5px;
  padding: 14px 16px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  background: var(--cream);
  font: inherit;
  line-height: 1.7;
}

.optional-details textarea:focus {
  outline: 3px solid rgba(31, 90, 56, 0.16);
  border-color: var(--green);
}

.choice-grid,
.radio-grid {
  display: grid;
  gap: 14px;
}

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

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

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

.choice-card,
.radio-card {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px 22px 20px 58px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper);
  cursor: pointer;
  line-height: 1.55;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.choice-card {
  min-height: 112px;
}

.radio-card {
  min-height: 104px;
  padding-left: 50px;
}

.choice-card:hover,
.radio-card:hover {
  border-color: var(--sage);
  transform: translateY(-1px);
}

.choice-card:has(input:checked),
.radio-card:has(input:checked) {
  border-color: var(--green);
  background: var(--sage-soft);
  box-shadow: inset 0 0 0 1px var(--green);
}

.choice-card input,
.radio-card input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.choice-card:focus-within,
.radio-card:focus-within {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.choice-mark,
.radio-card::before {
  position: absolute;
  top: 50%;
  left: 20px;
  width: 24px;
  height: 24px;
  border: 2px solid var(--sage);
  background: var(--white);
  content: "";
  transform: translateY(-50%);
}

.choice-mark {
  border-radius: 6px;
}

.radio-card::before {
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

.choice-card:has(input:checked) .choice-mark,
.radio-card:has(input:checked)::before {
  border-color: var(--green);
  background: var(--green);
  box-shadow: inset 0 0 0 4px var(--white);
}

.choice-card strong,
.radio-card strong {
  font-size: 17px;
}

.choice-card small,
.radio-card small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.field-error {
  margin: 18px 0 0;
  padding: 12px 16px;
  border-radius: 8px;
  color: #8b2f20;
  background: var(--coral-soft);
  font-weight: 700;
}

.form-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding-top: 28px;
  text-align: center;
}

.form-action p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.learning {
  border-top: 1px solid var(--line);
}

.learning-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: clamp(42px, 7vw, 86px);
  align-items: center;
  margin-bottom: 56px;
}

.learning-intro .form-heading {
  margin-bottom: 0;
}

.learning-figure {
  transform: rotate(-1deg);
}

.learning-list {
  border-top: 1px solid var(--line);
}

.learning-list details {
  border-bottom: 1px solid var(--line);
}

.learning-list summary {
  position: relative;
  display: grid;
  grid-template-columns: 130px minmax(150px, 0.7fr) 1fr 36px;
  gap: 22px;
  align-items: center;
  min-height: 104px;
  padding: 18px 12px;
  cursor: pointer;
  list-style: none;
}

.learning-list summary::-webkit-details-marker {
  display: none;
}

.learning-list summary::after {
  grid-column: 4;
  grid-row: 1;
  color: var(--green);
  content: "+";
  font-size: 30px;
  line-height: 1;
  text-align: center;
}

.learning-list details[open] summary::after {
  content: "−";
}

.learning-list summary span {
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.learning-list summary strong {
  font-size: 24px;
}

.learning-list summary small {
  color: var(--muted);
  font-size: 16px;
}

.learning-list details > div {
  max-width: 840px;
  padding: 0 12px 34px 164px;
}

.learning-list details p {
  margin: 0 0 12px;
}

.learning-key {
  padding: 12px 16px;
  border-left: 4px solid var(--green);
  background: var(--sage-soft);
  font-weight: 700;
}

.learning-list details > .os-learning-detail {
  max-width: none;
  padding-right: 12px;
}

.os-compare-lead {
  max-width: 840px;
}

.os-compare-wrap {
  margin: 24px 0 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}

.os-compare-table {
  min-width: 0;
  table-layout: fixed;
  font-size: 14px;
  line-height: 1.65;
}

.os-compare-table caption {
  padding: 16px 18px;
  color: var(--green-dark);
  background: var(--sage-soft);
  font-family: var(--display);
  font-size: 19px;
  font-weight: 800;
  text-align: left;
}

.os-compare-table th,
.os-compare-table td {
  padding: 15px 14px;
}

.os-compare-table thead th {
  background: var(--green);
}

.os-compare-table thead th:first-child {
  width: 15%;
}

.os-compare-table thead th:nth-child(2),
.os-compare-table thead th:nth-child(3) {
  width: 27%;
}

.os-compare-table thead th:last-child {
  width: 31%;
}

.os-compare-table tbody th {
  color: var(--green-dark);
  background: #f8f7f1;
  font-weight: 800;
  text-align: left;
}

.os-compare-table tbody tr:nth-child(even) td {
  background: #fffdf8;
}

.os-decision-order {
  display: grid;
  grid-template-columns: minmax(210px, 0.65fr) 1.35fr;
  gap: 28px;
  align-items: start;
  margin: 0 0 20px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
}

.os-decision-order h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.55;
}

.os-decision-order ol {
  margin: 0;
  padding-left: 1.5em;
}

.os-decision-order li + li {
  margin-top: 8px;
}

.os-source-links,
.learning-source-links {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.os-source-links a,
.learning-source-links a {
  margin-right: 12px;
  color: var(--green);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.learning-list details > .spec-learning-detail {
  max-width: 940px;
}

.learning-table-wrap {
  margin: 22px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}

.learning-guide-table {
  min-width: 0;
  table-layout: fixed;
  font-size: 15px;
  line-height: 1.65;
}

.learning-guide-table caption {
  padding: 15px 17px;
  color: var(--green-dark);
  background: var(--sage-soft);
  font-family: var(--display);
  font-size: 18px;
  font-weight: 800;
  text-align: left;
}

.learning-guide-table th,
.learning-guide-table td {
  width: auto;
  padding: 14px 15px;
}

.learning-guide-table thead th {
  color: var(--white);
  background: var(--green);
}

.learning-guide-table tbody th {
  color: var(--green-dark);
  background: #f8f7f1;
  font-weight: 800;
  text-align: left;
}

.learning-guide-table td,
.learning-guide-table td:nth-child(2),
.learning-guide-table td:nth-child(3) {
  width: auto;
  font-weight: 400;
}

.learning-guide-table tbody tr:nth-child(even) td {
  background: #fffdf8;
}

.cpu-guide-table thead th:first-child {
  width: 18%;
}

.cpu-guide-table thead th:nth-child(2) {
  width: 31%;
}

.cpu-guide-table thead th:last-child {
  width: 51%;
}

.capacity-guide-table thead th:first-child {
  width: 22%;
}

.capacity-guide-table thead th:last-child {
  width: 78%;
}

.device-type-note {
  font-weight: 700;
}

.device-type-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.device-type-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.device-type-image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  margin-bottom: 18px;
  border-radius: 12px;
  object-fit: cover;
}

.device-type-card h3 {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.55;
}

.device-type-card p:last-child {
  margin-bottom: 0;
}

.device-type-card p strong {
  color: var(--green);
}

.price-factor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.price-factor-grid section,
.total-cost-box {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}

.price-factor-grid h3,
.total-cost-box h3 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 19px;
}

.price-factor-grid p {
  margin: 6px 0 0;
}

.price-factor-grid p strong {
  color: var(--green);
}

.total-cost-box {
  margin-top: 16px;
  background: var(--sage-soft);
}

.total-cost-box p {
  margin: 0;
}

.result {
  margin-bottom: 100px;
  padding-block: clamp(72px, 9vw, 120px);
  border-radius: 30px;
  background: var(--sage-soft);
  box-shadow: var(--shadow);
}

.result > * {
  width: min(980px, calc(100% - 80px));
  margin-inline: auto;
}

.result-heading {
  text-align: center;
}

.result-type {
  display: inline-block;
  margin: 0 0 16px;
  padding: 7px 16px;
  border-radius: 999px;
  color: var(--white);
  background: var(--green);
  font-size: 15px;
  font-weight: 800;
}

.result-summary {
  max-width: 740px;
  margin: 22px auto 0;
}

.result-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 44px;
}

.result-panel,
.budget-guide,
.requirements,
.os-guide,
.prompt-card {
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}

.result-panel-caution {
  border-color: #edc6ba;
  background: #fffaf8;
}

.result-panel h3,
.budget-guide h3,
.requirements h3,
.os-guide h3,
.prompt-card h3 {
  margin: 0;
  font-size: clamp(22px, 2.3vw, 29px);
  line-height: 1.55;
}

.plain-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  margin-top: 12px;
  padding-left: 26px;
}

.plain-list li::before {
  position: absolute;
  top: 0.05em;
  left: 0;
  color: var(--green);
  content: "●";
  font-size: 11px;
}

.result-panel-caution .plain-list li::before {
  color: var(--coral);
}

.requirements,
.budget-guide,
.os-guide,
.prompt-card {
  margin-top: 20px;
}

.budget-guide-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  column-gap: 36px;
  align-items: start;
}

.budget-guide-heading .section-kicker {
  grid-column: 1 / -1;
}

.budget-guide-heading p:last-child {
  margin: 2px 0 0;
}

.budget-guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.budget-guide-grid > section {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}

.budget-guide-grid h4 {
  margin: 0;
  color: var(--green-dark);
  font-size: 18px;
}

.budget-guide-grid .plain-list {
  margin-top: 14px;
  font-size: 15px;
}

.requirements-heading,
.prompt-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 36px;
}

.requirements-heading > p {
  max-width: 390px;
  margin: 0;
  font-size: 15px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.65;
}

th,
td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--white);
  background: var(--green);
  font-size: 14px;
}

td:first-child {
  width: 16%;
  color: var(--green-dark);
  font-weight: 800;
}

td:nth-child(2),
td:nth-child(3) {
  width: 24%;
  font-weight: 700;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.os-guide {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) 1.25fr;
  gap: 42px;
  align-items: center;
}

.os-guide p:last-child {
  margin: 0;
}

.prompt-card {
  border-color: var(--green);
}

.prompt-figure {
  max-width: 760px;
  margin: 0 auto 34px;
  box-shadow: none;
}

.prompt-figure img {
  max-height: 430px;
}

.copy-button {
  min-height: 48px;
  flex: 0 0 auto;
  gap: 0;
  padding-inline: 22px;
  color: var(--white);
  background: var(--green);
}

.prompt-help {
  margin: 24px 0 14px;
  font-size: 15px;
}

#ai-prompt {
  width: 100%;
  min-height: 470px;
  padding: 22px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  background: var(--cream);
  font-size: 15px;
  line-height: 1.75;
}

.copy-status {
  min-height: 1.8em;
  margin: 10px 0 0;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

.result-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
}

.secondary-button {
  color: var(--green);
  background: transparent;
}

.secondary-button:hover {
  color: var(--white);
  background: var(--green);
}

.text-link {
  color: var(--green);
  font-weight: 800;
}

.tool-footer {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding: 42px max(40px, calc((100% - 1180px) / 2));
  color: var(--white);
  background: var(--green-dark);
  font-size: 14px;
}

.tool-footer p {
  max-width: 760px;
  margin: 0;
}

.tool-footer a {
  flex: 0 0 auto;
  font-weight: 800;
}

@media (max-width: 1000px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
  }

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

  .hero-side {
    width: min(760px, 100%);
  }

  .learning-intro {
    grid-template-columns: 1fr;
  }

  .learning-figure {
    width: min(700px, 100%);
  }

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

@media (max-width: 1100px) {
  .os-compare-wrap {
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
  }

  .os-compare-table,
  .os-compare-table tbody,
  .os-compare-table tr,
  .os-compare-table th,
  .os-compare-table td {
    display: block;
    width: 100%;
  }

  .os-compare-table {
    font-size: 15px;
  }

  .os-compare-table caption {
    display: block;
    width: 100%;
    margin-bottom: 12px;
    box-sizing: border-box;
    border-radius: 12px;
  }

  .os-compare-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .os-compare-table tbody tr {
    margin-bottom: 16px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
  }

  .os-compare-table tbody th {
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--green);
    color: var(--white);
    font-size: 17px;
  }

  .os-compare-table tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

  .os-compare-table tbody tr:nth-child(even) td {
    background: var(--white);
  }

  .os-compare-table tbody td::before {
    display: block;
    margin-bottom: 4px;
    color: var(--green);
    content: attr(data-label);
    font-size: 13px;
    font-weight: 800;
  }

  .os-compare-table tbody td:last-child {
    border-bottom: 0;
    background: var(--sage-soft);
  }
}

@media (max-width: 1000px) {
  .result {
    width: calc(100% - 48px);
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .section-shell,
  .tool-header {
    width: calc(100% - clamp(36px, 10.6vw, 44px));
  }

  .tool-header {
    min-height: 66px;
  }

  .tool-brand {
    font-size: 22px;
  }

  .tool-header p {
    font-size: 12px;
    letter-spacing: 0.04em;
  }

  .hero {
    gap: 46px;
    padding-block: 64px 72px;
  }

  .hero h1 {
    font-size: clamp(32px, 10vw, 46px);
    line-height: 1.43;
    letter-spacing: 0.02em;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-lead br {
    display: none;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .hero-actions {
    display: grid;
  }

  .hero-actions .primary-button,
  .hero-actions .secondary-button {
    min-width: 0;
  }

  .hero-map {
    padding: 28px 24px;
    border-radius: 18px;
  }

  .editorial-figure {
    border-radius: 18px;
  }

  .editorial-figure figcaption {
    padding: 10px 14px 12px;
    font-size: 13px;
    letter-spacing: 0.02em;
  }

  .hero-figure,
  .learning-figure {
    transform: none;
  }

  .map-step {
    grid-template-columns: 44px 1fr;
    column-gap: 14px;
  }

  .map-step > span {
    width: 44px;
    height: 44px;
  }

  .map-line {
    height: 36px;
    margin-left: 22px;
  }

  .map-step strong {
    font-size: 18px;
  }

  .promise,
  .learning,
  .guide-form {
    padding-block: clamp(64px, 17vw, 78px);
  }

  .promise h2,
  .form-heading h2,
  .result-heading h2 {
    font-size: clamp(28px, 8.5vw, 36px);
    line-height: 1.55;
  }

  .promise-grid,
  .choice-grid-uses,
  .radio-grid,
  .radio-grid-budget,
  .result-columns,
  .price-factor-grid,
  .budget-guide-grid,
  .os-guide {
    grid-template-columns: 1fr;
  }

  .promise-grid {
    margin-top: 36px;
  }

  .promise-grid article {
    min-height: 0;
    padding: 26px;
  }

  .question-card {
    margin-bottom: 22px;
    padding: 24px 18px;
    border-radius: 16px;
  }

  .question-card legend {
    font-size: 20px;
  }

  .question-card legend span {
    width: 34px;
    height: 34px;
    margin-right: 8px;
    font-size: 14px;
  }

  .choice-card,
  .radio-card {
    min-height: 92px;
  }

  .learning-list summary {
    grid-template-columns: 1fr 34px;
    gap: 4px 14px;
    min-height: 100px;
    padding-block: 16px;
  }

  .learning-list summary span,
  .learning-list summary strong,
  .learning-list summary small {
    grid-column: 1;
  }

  .learning-list summary strong {
    font-size: 21px;
  }

  .learning-list summary small {
    font-size: 14px;
  }

  .learning-list details > div {
    padding: 0 0 28px;
  }

  .learning-table-wrap {
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
  }

  .learning-guide-table,
  .learning-guide-table tbody,
  .learning-guide-table tr,
  .learning-guide-table th,
  .learning-guide-table td {
    display: block;
    width: 100%;
  }

  .learning-guide-table {
    font-size: 15px;
  }

  .learning-guide-table caption {
    display: block;
    width: 100%;
    margin-bottom: 12px;
    box-sizing: border-box;
    border-radius: 12px;
  }

  .learning-guide-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .learning-guide-table tbody tr {
    margin-bottom: 14px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--white);
  }

  .learning-guide-table tbody th {
    padding: 13px 15px;
    border-bottom: 1px solid var(--line);
    background: var(--green);
    color: var(--white);
    font-size: 17px;
  }

  .learning-guide-table tbody td,
  .learning-guide-table tbody td:nth-child(2),
  .learning-guide-table tbody td:nth-child(3) {
    width: 100%;
    padding: 13px 15px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

  .learning-guide-table tbody tr:nth-child(even) td {
    background: var(--white);
  }

  .learning-guide-table tbody td::before {
    display: block;
    margin-bottom: 4px;
    color: var(--green);
    content: attr(data-label);
    font-size: 13px;
    font-weight: 800;
  }

  .learning-guide-table tbody td:last-child {
    border-bottom: 0;
  }

  .os-decision-order {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px 18px;
  }

  .device-type-grid {
    grid-template-columns: 1fr;
  }

  .learning-intro {
    gap: 30px;
    margin-bottom: 42px;
  }

  .result {
    width: calc(100% - 24px);
    margin-bottom: 64px;
    border-radius: 20px;
  }

  .result > * {
    width: calc(100% - clamp(36px, 10.6vw, 44px));
  }

  .result-columns {
    gap: 16px;
    margin-top: 34px;
  }

  .result-panel,
  .budget-guide,
  .requirements,
  .os-guide,
  .prompt-card {
    padding: 24px 18px;
  }

  .requirements-heading,
  .prompt-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .budget-guide-heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .budget-guide-heading .section-kicker {
    grid-column: 1;
  }

  .copy-button {
    width: 100%;
  }

  .prompt-figure {
    margin-bottom: 28px;
  }

  .os-guide {
    gap: 20px;
  }

  #ai-prompt {
    min-height: 560px;
    padding: 16px;
    font-size: 14px;
  }

  .result-actions,
  .tool-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .result-actions {
    text-align: center;
  }

  .tool-footer {
    gap: 20px;
    padding: 34px clamp(18px, 5.3vw, 22px);
  }
}

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

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