@charset "utf-8";

/* ==========================================================================
   発明発見エンジン Roboken 販売LP
   株式会社ロボケン
   Palette: off-white #F7F4EF / ink #12161C / vermilion #9A2B2B / slate #47566B
   ========================================================================== */

:root {
  --paper: #f7f4ef;
  --paper-2: #fffdfa;
  --paper-3: #efeae1;
  --ink: #12161c;
  --ink-2: #3b434e;
  --ink-3: #6b7280;
  --vermilion: #9a2b2b;
  --vermilion-2: #7d2020;
  --slate: #47566b;

  /* 濃い面とその上の文字。ライト／ダークで反転させない。 */
  --surface-dark: #12161c;
  --surface-slate: #47566b;
  --on-dark: #f7f4ef;
  --accent-solid: #9a2b2b;
  --accent-solid-hover: #7d2020;

  --line: #ded7cb;
  --line-2: #e9e3d9;
  --shadow: 0 1px 2px rgba(18, 22, 28, .04), 0 12px 32px -18px rgba(18, 22, 28, .22);
  --shadow-lg: 0 2px 4px rgba(18, 22, 28, .05), 0 28px 60px -28px rgba(18, 22, 28, .3);

  --sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium", "Yu Gothic", Meiryo, system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Times New Roman", serif;

  --w: 1120px;
  --w-narrow: 760px;
  --radius: 4px;
  --header-h: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14171c;
    --paper-2: #1b1f26;
    --paper-3: #22272f;
    --ink: #eceae5;
    --ink-2: #c2c6cd;
    --ink-3: #9aa1ab;
    --vermilion: #e08a83;
    --vermilion-2: #f0a9a2;
    --slate: #9fb0c6;

    --surface-dark: #0d1014;
    --surface-slate: #3a475a;
    --on-dark: #f2efe9;
    --accent-solid: #a83232;
    --accent-solid-hover: #bb3b3b;

    --line: #333a44;
    --line-2: #2a3038;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px -18px rgba(0, 0, 0, .7);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .45), 0 28px 60px -28px rgba(0, 0, 0, .8);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  font-feature-settings: "palt" 1;
  letter-spacing: .01em;
  overflow-wrap: break-word;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--vermilion);
  text-decoration-thickness: 1px;
  text-underline-offset: .2em;
}

a:hover {
  color: var(--vermilion-2);
}

:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 3px;
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--w);
  margin-inline: auto;
  padding-inline: 24px;
}

.wrap--narrow {
  max-width: var(--w-narrow);
}

.section {
  padding-block: 88px;
  border-top: 1px solid var(--line-2);
}

.section--flat {
  border-top: 0;
}

.section--tint {
  background: var(--paper-3);
}

.section--ink {
  background: var(--surface-dark);
  color: var(--on-dark);
  border-top: 0;
}

.section--ink .label {
  color: #d99b95;
}

.section--ink .note,
.section--ink .lead {
  color: rgba(247, 244, 239, .74);
}

@media (max-width: 720px) {
  .section {
    padding-block: 60px;
  }
}

/* ---------- typography ---------- */

.label {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--vermilion);
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.label--center {
  justify-content: center;
}

.label::after {
  content: "";
  flex: 0 0 40px;
  height: 1px;
  background: currentColor;
  opacity: .5;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: .005em;
  margin: 0;
}

h2 {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  margin-bottom: 24px;
}

h2 + .h2sub {
  margin-top: -8px;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.lead {
  font-size: 1.02rem;
  color: var(--ink-2);
  max-width: 62ch;
  margin: 0 0 32px;
}

p {
  margin: 0 0 1.4em;
  max-width: 68ch;
}

.body-text {
  max-width: 66ch;
}

.emphasis {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 2.3vw, 1.35rem);
  font-weight: 600;
  line-height: 1.7;
  border-left: 3px solid var(--vermilion);
  padding: 4px 0 4px 22px;
  margin: 36px 0;
  max-width: 60ch;
}

.note {
  font-size: .8rem;
  line-height: 1.85;
  color: var(--ink-3);
  max-width: 78ch;
  margin: 16px 0 0;
}

.note--boxed {
  background: var(--paper-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.strong {
  font-weight: 700;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 12px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: .97rem;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, color .15s ease, border-color .15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent-solid);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-solid-hover);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn--ghost:hover {
  color: var(--ink);
  border-color: var(--ink-3);
}

.btn--onink {
  background: transparent;
  color: var(--on-dark);
  border-color: rgba(247, 244, 239, .4);
}

.btn--onink:hover {
  color: var(--on-dark);
  border-color: var(--on-dark);
}

.btn--sm {
  min-height: 40px;
  padding: 6px 18px;
  font-size: .82rem;
}

.btn--block {
  width: 100%;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
}

.cta-inline {
  margin-top: 40px;
}

/* ---------- header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line-2);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--w);
  margin-inline: auto;
  padding-inline: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand__name {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.brand__co {
  font-size: .72rem;
  color: var(--ink-3);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header__links {
  display: flex;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .85rem;
}

.header__links a {
  color: var(--ink-2);
  text-decoration: none;
}

.header__links a:hover {
  color: var(--vermilion);
}

@media (max-width: 900px) {
  .header__links {
    display: none;
  }
}

@media (max-width: 560px) {
  .brand__co {
    display: none;
  }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background: var(--paper);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("../img/hero-bg.jpg");
  background-size: cover;
  background-position: center right;
  opacity: 1;
}

@media (prefers-color-scheme: dark) {
  .hero__bg {
    opacity: .22;
  }
}

.hero__inner {
  position: relative;
  padding-block: 96px 72px;
}

.hero__body {
  max-width: 640px;
}

.kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 26px;
}

.hero h1 {
  font-size: clamp(1.95rem, 5.4vw, 3.15rem);
  line-height: 1.36;
  letter-spacing: -.005em;
  margin-bottom: 28px;
}

.hero__sub {
  font-size: 1.04rem;
  color: var(--ink-2);
  max-width: 46ch;
  margin-bottom: 34px;
}

.hero__note {
  font-size: .8rem;
  color: var(--ink-3);
  margin: 18px 0 0;
  max-width: 44ch;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 72px;
  border-top: 1px solid var(--line);
}

.stats__item {
  padding: 26px 26px 26px 0;
  border-right: 1px solid var(--line);
}

.stats__item:last-child {
  border-right: 0;
}

.stats__item:not(:first-child) {
  padding-left: 26px;
}

.stats__num {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.6vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  display: block;
  margin-bottom: 8px;
}

.stats__label {
  font-size: .82rem;
  line-height: 1.75;
  color: var(--ink-2);
  margin: 0;
}

@media (max-width: 720px) {
  .hero__inner {
    padding-block: 56px 48px;
  }

  .hero__bg {
    opacity: .35;
  }

  .stats {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .stats__item {
    padding: 18px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stats__item:not(:first-child) {
    padding-left: 0;
  }

  .stats__item:last-child {
    border-bottom: 0;
  }
}

@media (prefers-color-scheme: dark) and (max-width: 720px) {
  .hero__bg {
    opacity: .18;
  }
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--paper-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
}

.card__no {
  font-family: var(--serif);
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--vermilion);
  display: block;
  margin-bottom: 14px;
}

.card p {
  font-size: .93rem;
  margin: 0;
  color: var(--ink-2);
}

/* ---------- tables ---------- */

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--paper-2);
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: .92rem;
}

caption {
  text-align: left;
  font-size: .82rem;
  color: var(--ink-3);
  padding: 14px 18px 0;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-2);
  line-height: 1.75;
}

thead th {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink-3);
  background: var(--paper-3);
  white-space: nowrap;
}

tbody th {
  font-weight: 600;
  width: 34%;
  color: var(--ink);
}

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

td.num,
th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.t-strong {
  color: var(--vermilion);
  font-weight: 700;
}

.table-hint {
  font-size: .78rem;
  color: var(--ink-3);
  margin: 10px 0 0;
}

@media (max-width: 720px) {
  .table-hint::before {
    content: "横にスクロールできます。";
    display: block;
  }
}

/* ---------- definition list ---------- */

.deflist {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.deflist > div {
  border-top: 1px solid var(--line-2);
  padding-top: 18px;
}

.deflist dt {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.deflist dd {
  margin: 0;
  font-size: .93rem;
  color: var(--ink-2);
}

/* ---------- lists ---------- */

.list {
  margin: 0 0 24px;
  padding-left: 1.2em;
}

.list li {
  margin-bottom: .5em;
  color: var(--ink-2);
}

.list--plain {
  list-style: none;
  padding-left: 0;
}

.list--plain li {
  position: relative;
  padding-left: 26px;
  margin-bottom: .8em;
}

.list--plain li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .78em;
  width: 10px;
  height: 1px;
  background: var(--vermilion);
}

.cols-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

/* ---------- figure ---------- */

.figure {
  margin: 0 0 44px;
}

.figure__media {
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: 12px;
}

.figure figcaption {
  font-size: .85rem;
  line-height: 1.85;
  color: var(--ink-2);
  margin-top: 14px;
  max-width: 74ch;
}

.figure__title {
  display: block;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

/* ---------- 図4 入力と出力 ---------- */

.io {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 0;
  margin: 0 0 20px;
}

.io__box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  padding: 24px 22px;
}

.io__box--core {
  background: var(--surface-slate);
  color: #fff;
  border-color: var(--surface-slate);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-width: 210px;
  margin-inline: 18px;
}

.io__head {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 16px;
}

.io__box--core .io__head {
  color: rgba(255, 255, 255, .72);
}

.io__name {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.io__core-note {
  font-size: .85rem;
  margin: 0;
  color: rgba(255, 255, 255, .88);
}

.io__items {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: .92rem;
}

.io__items li {
  padding: 10px 0;
  border-top: 1px solid var(--line-2);
  color: var(--ink-2);
}

.io__items li:first-child {
  border-top: 0;
  padding-top: 0;
}

@media (max-width: 860px) {
  .io {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .io__box--core {
    margin-inline: 0;
    min-width: 0;
    padding-block: 30px;
  }
}

/* ---------- steps ---------- */

.steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.steps > li {
  position: relative;
  padding: 0 0 32px 62px;
  border-left: 1px solid var(--line);
  margin-left: 18px;
}

.steps > li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.steps > li::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  left: -18px;
  top: -4px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--vermilion);
  color: var(--vermilion);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.steps h3 {
  margin-bottom: 6px;
}

.steps p {
  font-size: .93rem;
  color: var(--ink-2);
  margin: 0 0 4px;
}

.steps .steps__prep {
  font-size: .82rem;
  color: var(--ink-3);
}

/* ---------- before / after ---------- */

.ba {
  display: grid;
  gap: 0;
}

.ba__row {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line-2);
  font-size: .93rem;
}

.ba__head {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-top: 0;
  padding-top: 0;
}

.ba__scene {
  font-weight: 600;
}

.ba__before {
  color: var(--ink-3);
}

.ba__after {
  color: var(--ink);
}

.ba__after strong {
  font-weight: 600;
}

@media (max-width: 760px) {
  .ba__row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .ba__head {
    display: none;
  }

  .ba__before::before {
    content: "導入前：";
    font-weight: 700;
  }

  .ba__after::before {
    content: "導入後：";
    font-weight: 700;
    color: var(--vermilion);
  }
}

/* ---------- faq ---------- */

.faq {
  border-top: 1px solid var(--line-2);
}

.faq details {
  border-bottom: 1px solid var(--line-2);
}

.faq summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 0;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

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

.faq summary::before {
  content: "Q";
  font-family: var(--serif);
  color: var(--vermilion);
  font-size: .9rem;
  line-height: 1.9;
  flex: 0 0 auto;
}

.faq summary::after {
  content: "";
  margin-left: auto;
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: .62em;
  border-right: 1px solid var(--ink-3);
  border-bottom: 1px solid var(--ink-3);
  transform: rotate(45deg);
  transition: transform .2s ease;
}

.faq details[open] summary::after {
  transform: rotate(-135deg);
}

.faq__a {
  display: flex;
  gap: 14px;
  padding: 0 0 22px;
  font-size: .93rem;
  color: var(--ink-2);
}

.faq__a::before {
  content: "A";
  font-family: var(--serif);
  color: var(--ink-3);
  font-size: .9rem;
  flex: 0 0 auto;
}

.faq__a p {
  margin: 0;
}

/* ---------- guarantee list ---------- */

.nolist {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  max-width: 68ch;
}

.nolist li {
  position: relative;
  padding: 16px 0 16px 34px;
  border-top: 1px solid rgba(247, 244, 239, .16);
  font-size: .97rem;
}

.nolist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.55em;
  width: 16px;
  height: 1px;
  background: #d99b95;
}

/* ---------- form ---------- */

.form {
  display: grid;
  gap: 22px;
  max-width: 660px;
  margin: 36px 0 0;
}

.field {
  display: grid;
  gap: 8px;
}

.field > label,
.field > .field__label {
  font-size: .88rem;
  font-weight: 700;
}

.field--fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-inline-size: 0;
}

.req,
.opt {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 2px 7px;
  border-radius: 2px;
  margin-left: 8px;
  vertical-align: 2px;
}

.req {
  background: var(--accent-solid);
  color: #fff;
}

.opt {
  background: var(--paper-3);
  color: var(--ink-3);
  border: 1px solid var(--line-2);
}

.field__hint {
  font-size: .78rem;
  color: var(--ink-3);
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px 14px;
  line-height: 1.6;
}

textarea {
  min-height: 118px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--vermilion);
  outline: none;
  box-shadow: 0 0 0 3px rgba(154, 43, 43, .12);
}

.radios {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.radio {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  font-size: .92rem;
  cursor: pointer;
}

.radio:has(input:checked) {
  border-color: var(--vermilion);
  box-shadow: inset 0 0 0 1px var(--vermilion);
}

.radio input,
.consent input {
  accent-color: var(--vermilion);
  width: 18px;
  height: 18px;
  margin: 0;
  flex: 0 0 auto;
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  font-size: .92rem;
  cursor: pointer;
}

.error {
  font-size: .8rem;
  font-weight: 700;
  color: var(--vermilion);
  display: none;
}

.field.is-error .error {
  display: block;
}

.field.is-error input,
.field.is-error select,
.field.is-error textarea,
.field.is-error .radio,
.field.is-error .consent {
  border-color: var(--vermilion);
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form__submit {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.form__submit .note {
  margin: 0;
}

.form-status {
  display: none;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: .9rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.form-status.is-visible {
  display: block;
}

.form-status.is-error {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

/* ---------- contact section ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 56px;
  align-items: start;
}

.contact-aside {
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--paper-2);
  padding: 26px;
  font-size: .9rem;
}

.contact-aside h3 {
  font-size: 1rem;
}

.contact-aside dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.contact-aside dt {
  font-size: .78rem;
  color: var(--ink-3);
}

.contact-aside dd {
  margin: 2px 0 0;
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line-2);
  background: var(--paper-3);
  padding-block: 76px;
  text-align: center;
}

.cta-band__bg {
  position: absolute;
  inset: 0;
  background-image: url("../img/cta-bg.jpg");
  background-size: cover;
  background-position: center;
}

@media (prefers-color-scheme: dark) {
  .cta-band__bg {
    opacity: .18;
  }
}

.cta-band__inner {
  position: relative;
}

.cta-band h2 {
  margin-bottom: 18px;
}

.cta-band .btn-row {
  justify-content: center;
}

.cta-band .note {
  margin-inline: auto;
  text-align: center;
}

/* ---------- footer ---------- */

.footer {
  background: var(--surface-dark);
  color: rgba(247, 244, 239, .8);
  padding-block: 64px 40px;
  font-size: .88rem;
}

.footer a {
  color: rgba(247, 244, 239, .8);
  text-decoration: none;
}

.footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(247, 244, 239, .16);
}

.footer__name {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--on-dark);
  margin: 0 0 12px;
}

.footer__addr {
  font-size: .84rem;
  line-height: 1.9;
  font-style: normal;
  color: rgba(247, 244, 239, .66);
}

.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: space-between;
  padding-top: 28px;
  font-size: .78rem;
  color: rgba(247, 244, 239, .56);
}

@media (max-width: 760px) {
  .footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ---------- footer social / related links ---------- */

.footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: rgba(247, 244, 239, .8);
  border: 1px solid rgba(247, 244, 239, .22);
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}

.footer__social-link:hover {
  color: #fff;
  background: rgba(247, 244, 239, .12);
  border-color: rgba(247, 244, 239, .5);
  text-decoration: none;
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
  display: block;
}

/* ---------- sticky mobile bar ---------- */

.mobile-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  display: none;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
}

.mobile-cta[hidden] {
  display: none;
}

/* 追従バーの高さぶんだけ本文を空け、バーが本文を隠さないようにする。 */
@media (max-width: 760px) {
  .mobile-cta {
    display: block;
  }

  body {
    padding-bottom: 92px;
  }

  body.cta-hidden {
    padding-bottom: 0;
  }
}

/* ---------- sub pages ---------- */

.page-head {
  padding-block: 72px 44px;
}

.page-head h1 {
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  margin-bottom: 14px;
}

.page-head .note {
  margin-top: 10px;
}

.breadcrumb {
  font-size: .78rem;
  color: var(--ink-3);
  margin: 0 0 22px;
}

.breadcrumb a {
  color: var(--ink-3);
}

.doc {
  padding-bottom: 88px;
}

.doc h2 {
  font-size: 1.22rem;
  margin: 52px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-2);
}

.doc h2:first-of-type {
  margin-top: 0;
}

.doc h3 {
  font-size: 1.02rem;
  margin: 30px 0 10px;
}

.doc p,
.doc li {
  font-size: .95rem;
  color: var(--ink-2);
}

.doc ol,
.doc ul {
  padding-left: 1.4em;
  margin: 0 0 1.4em;
}

.doc li {
  margin-bottom: .5em;
}

.doc .table-scroll {
  margin-bottom: 1.6em;
}

.doc-meta {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--line-2);
  font-size: .84rem;
  color: var(--ink-3);
}

.toc {
  background: var(--paper-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 48px;
}

.toc h2 {
  font-size: .82rem;
  font-family: var(--sans);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 0;
  margin: 0 0 12px;
  padding: 0;
}

.toc ol,
.toc ul {
  margin: 0;
  padding-left: 1.2em;
  columns: 2;
  column-gap: 32px;
}

.toc li {
  font-size: .88rem;
  margin-bottom: .4em;
  break-inside: avoid;
}

@media (max-width: 640px) {
  .toc ol,
  .toc ul {
    columns: 1;
  }
}

.thanks {
  padding-block: 120px;
  text-align: center;
}

.thanks h1 {
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  margin-bottom: 22px;
}

.thanks p {
  margin-inline: auto;
  text-align: left;
  max-width: 56ch;
}

.thanks .btn-row {
  justify-content: center;
  margin-top: 32px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent-solid);
  color: #fff;
  padding: 10px 18px;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

@media print {
  .header,
  .mobile-cta,
  .cta-band,
  .hero__bg {
    display: none;
  }
}