/* ─────────────────────────────────────────
   CSS カスタムプロパティ
───────────────────────────────────────── */
:root {
  --color-text: #3d2e1e;
  --color-text-muted: #7a6552;
  --color-bg: #fffcf5;
  --color-surface: #f5edd8;
  --color-primary: #956118;
  --color-primary-dark: #7a4e14;
  --color-dark: #3d2e1e;
  --color-white: #ffffff;
  --color-border: #e5d8c4;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}

/* ─────────────────────────────────────────
   ベース
───────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

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

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

/* ─────────────────────────────────────────
   レイアウト
───────────────────────────────────────── */
.container {
  width: min(100% - 2.5rem, 70rem);
  margin-inline: auto;
}

/* ─────────────────────────────────────────
   ヘッダー
───────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 252, 245, 0.94);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(0.75rem);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
}

.site-header__logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.site-header__menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  min-width: 4.5rem;
  min-height: 2.75rem;
  padding-inline: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999rem;
  background: var(--color-white);
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text);
  transition: background-color 0.2s ease;
}

.site-header__menu-button:hover {
  background: var(--color-surface);
}

@media screen and (min-width: 48rem) {
  .site-header__menu-button {
    display: none;
  }
}

/* ─────────────────────────────────────────
   ナビゲーション
───────────────────────────────────────── */
.site-nav {
  display: none;
  position: absolute;
  top: calc(100% + 1px);
  left: 0;
  width: 100%;
  padding: 1.25rem 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

@media screen and (min-width: 48rem) {
  .site-nav {
    display: block;
    position: static;
    width: auto;
    padding: 0;
    background: transparent;
    border-bottom: 0;
  }
}

.site-nav.is-open {
  display: block;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-inline: 1.25rem;
  list-style: none;
  margin: 0;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media screen and (min-width: 48rem) {
  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    padding-inline: 0;
    padding-left: 0;
    padding-right: 0;
  }
}

.site-nav__link {
  display: block;
  padding: 0.625rem 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-primary);
}

@media screen and (min-width: 48rem) {
  .site-nav__link {
    padding: 0.375rem 0.75rem;
    border-radius: 999rem;
  }

  .site-nav__link:hover {
    background: var(--color-surface);
    color: var(--color-text);
  }
}

.site-nav__link--cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding-inline: 1.25rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 999rem;
  font-size: 0.8125rem;
  font-weight: 700;
  transition: background-color 0.2s ease;
}

.site-nav__link--cta:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

/* ─────────────────────────────────────────
   ボタン
───────────────────────────────────────── */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3.25rem;
  padding-inline: 2rem;
  border: 2px solid transparent;
  border-radius: 999rem;
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

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

.button--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

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

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

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

.button--white:hover {
  background: var(--color-surface);
  border-color: var(--color-surface);
}

/* ─────────────────────────────────────────
   セクション共通
───────────────────────────────────────── */
.section {
  padding-block: 4.5rem;
}

@media screen and (min-width: 48rem) {
  .section {
    padding-block: 6rem;
  }
}

.section--alt {
  background: var(--color-surface);
}

.section__header {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 3rem;
  text-align: center;
}

.section__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section__title {
  font-size: 1.625rem;
  font-weight: 700;
  line-height: 1.3;
}

@media screen and (min-width: 48rem) {
  .section__title {
    font-size: 2.125rem;
  }
}

.section__text {
  max-width: 40rem;
  margin-inline: auto;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ─────────────────────────────────────────
   ページヒーロー（下層ページ共通）
───────────────────────────────────────── */
.page-hero {
  padding-block: 4rem 3.5rem;
  background: var(--color-surface);
  text-align: center;
}

@media screen and (min-width: 48rem) {
  .page-hero {
    padding-block: 5rem 4.5rem;
  }
}

.page-hero__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.page-hero__title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
}

@media screen and (min-width: 48rem) {
  .page-hero__title {
    font-size: 2.5rem;
  }
}

/* ─────────────────────────────────────────
   ヒーロー（トップページ）
───────────────────────────────────────── */
.hero {
  padding-block: 4rem 4.5rem;
  background: var(--color-bg);
  overflow: hidden;
}

@media screen and (min-width: 48rem) {
  .hero {
    padding-block: 5rem 6rem;
  }
}

.hero__inner {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media screen and (min-width: 48rem) {
  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.hero__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.hero__title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

@media screen and (min-width: 48rem) {
  .hero__title {
    font-size: 2.375rem;
  }
}

@media screen and (min-width: 64rem) {
  .hero__title {
    font-size: 2.75rem;
  }
}

.hero__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.hero__visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.hero__work-img {
  border-radius: 0.625rem;
  overflow: hidden;
  box-shadow: 0 0.25rem 1.25rem rgba(61, 46, 30, 0.12);
  aspect-ratio: 4 / 3;
}

.hero__work-img:nth-child(2) {
  margin-top: 1.5rem;
}

.hero__work-img:nth-child(4) {
  margin-top: -1.5rem;
}

.hero__work-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

/* ─────────────────────────────────────────
   制作実績スライダー
───────────────────────────────────────── */
.works-slider {
  position: relative;
  overflow: hidden;
}

.works-slider__track {
  display: flex;
  transition: transform 0.4s ease;
}

.works-slider__slide {
  min-width: 100%;
  padding-inline: 0.25rem;
}

@media screen and (min-width: 48rem) {
  .works-slider__slide {
    min-width: calc(100% / 2);
  }
}

@media screen and (min-width: 64rem) {
  .works-slider__slide {
    min-width: calc(100% / 3);
  }
}

.works-slider__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.works-slider__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  cursor: pointer;
  transition: background-color 0.2s ease;
  padding: 0;
}

.works-slider__btn:hover {
  background: var(--color-surface);
}

.works-slider__dots {
  display: flex;
  gap: 0.5rem;
}

.works-slider__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-border);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.works-slider__dot.is-active {
  background: var(--color-primary);
  transform: scale(1.3);
}

/* ─────────────────────────────────────────
   制作実績カード
───────────────────────────────────────── */
.work-card {
  display: grid;
  border-radius: 0.875rem;
  overflow: hidden;
  background: var(--color-white);
  box-shadow: 0 0.125rem 0.75rem rgba(61, 46, 30, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.work-card:hover {
  transform: translateY(-0.25rem);
  box-shadow: 0 0.5rem 1.75rem rgba(61, 46, 30, 0.14);
}

.work-card__thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.work-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s ease;
}

.work-card:hover .work-card__thumb img {
  transform: scale(1.04);
}

.work-card__body {
  padding: 1.25rem 1.375rem 1.375rem;
  display: grid;
  gap: 0.5rem;
}

.work-card__tag {
  display: inline-block;
  padding: 0.1875rem 0.625rem;
  border-radius: 999rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  width: fit-content;
}

.work-card__title {
  font-size: 1rem;
  font-weight: 700;
}

.work-card__desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.work-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 0.25rem;
  transition: gap 0.2s ease;
}

.work-card__link:hover {
  gap: 0.5rem;
}

/* ─────────────────────────────────────────
   実績グリッド（Worksページ）
───────────────────────────────────────── */
.works-grid {
  display: grid;
  gap: 1.75rem;
}

@media screen and (min-width: 48rem) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

/* ─────────────────────────────────────────
   サービスカード
───────────────────────────────────────── */
.service-grid {
  display: grid;
  gap: 1.5rem;
}

@media screen and (min-width: 48rem) {
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }
}

.service-card {
  background: var(--color-white);
  border-radius: 0.875rem;
  padding: 2rem 1.75rem;
  display: grid;
  gap: 0.75rem;
  box-shadow: 0 0.125rem 0.75rem rgba(61, 46, 30, 0.06);
}

.service-card__icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  background: var(--color-surface);
  display: grid;
  place-items: center;
  color: var(--color-primary);
}

.service-card__title {
  font-size: 1.125rem;
  font-weight: 700;
}

.service-card__price {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
}

.service-card__price span {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.service-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.service-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.375rem;
}

.service-card__list li {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-left: 1rem;
  position: relative;
}

.service-card__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* ─────────────────────────────────────────
   制作の流れ
───────────────────────────────────────── */
.flow-list {
  display: grid;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

@media screen and (min-width: 48rem) {
  .flow-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
}

.flow-item {
  display: grid;
  gap: 0.75rem;
  text-align: center;
  padding: 1.75rem 1.25rem;
  position: relative;
}

@media screen and (min-width: 48rem) {
  .flow-item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 2.25rem;
    right: -0.0625rem;
    width: 0.125rem;
    height: 1.5rem;
    background: var(--color-border);
  }
}

.flow-item__num {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  margin-inline: auto;
}

.flow-item__title {
  font-size: 0.9375rem;
  font-weight: 700;
}

.flow-item__desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ─────────────────────────────────────────
   About（トップ）
───────────────────────────────────────── */
.about-section__inner {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media screen and (min-width: 48rem) {
  .about-section__inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.about-section__img {
  border-radius: 1rem;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.about-section__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-section__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.about-section__title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
}

@media screen and (min-width: 48rem) {
  .about-section__title {
    font-size: 1.875rem;
  }
}

.about-section__text {
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 1.75rem;
}

/* ─────────────────────────────────────────
   スキル（Aboutページ）
───────────────────────────────────────── */
.skills-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
}

@media screen and (min-width: 48rem) {
  .skills-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.skill-item {
  background: var(--color-white);
  border-radius: 0.75rem;
  padding: 1.25rem 1rem;
  text-align: center;
  display: grid;
  gap: 0.5rem;
  box-shadow: 0 0.125rem 0.625rem rgba(61, 46, 30, 0.06);
}

.skill-item__name {
  font-size: 0.875rem;
  font-weight: 700;
}

.skill-item__level {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────────
   CTAバナー
───────────────────────────────────────── */
.cta-banner {
  background: var(--color-primary);
  padding-block: 4rem;
  text-align: center;
}

@media screen and (min-width: 48rem) {
  .cta-banner {
    padding-block: 5rem;
  }
}

.cta-banner__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

@media screen and (min-width: 48rem) {
  .cta-banner__title {
    font-size: 2rem;
  }
}

.cta-banner__text {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  line-height: 1.8;
}

/* ─────────────────────────────────────────
   お問い合わせフォーム
───────────────────────────────────────── */
.contact-form {
  max-width: 45rem;
  margin-inline: auto;
  display: grid;
  gap: 1.5rem;
}

.form-group {
  display: grid;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
}

.form-label__required {
  display: inline-block;
  margin-left: 0.375rem;
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.625rem;
  font-weight: 700;
  vertical-align: middle;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.625rem;
  background: var(--color-white);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(149, 97, 24, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #bfb5a8;
}

.form-textarea {
  resize: vertical;
  min-height: 10rem;
  line-height: 1.7;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237a6552' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.75rem;
  cursor: pointer;
}

.form-submit {
  text-align: center;
  margin-top: 0.5rem;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  text-align: center;
}

/* ─────────────────────────────────────────
   フッター
───────────────────────────────────────── */
.site-footer {
  padding-block: 2.5rem;
  background: var(--color-dark);
  color: var(--color-white);
}

.site-footer__inner {
  display: grid;
  gap: 1.25rem;
  text-align: center;
}

@media screen and (min-width: 48rem) {
  .site-footer__inner {
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    text-align: left;
  }
}

.site-footer__logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

@media screen and (min-width: 48rem) {
  .site-footer__nav {
    gap: 0.25rem 1.25rem;
  }
}

.site-footer__nav a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.site-footer__nav a:hover {
  color: var(--color-white);
}

.site-footer__copy {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
}

@media screen and (min-width: 48rem) {
  .site-footer__copy {
    text-align: right;
  }
}

/* ─────────────────────────────────────────
   アクセシビリティ
───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .work-card,
  .works-slider__track {
    transition: none;
  }
}