/* ==============================================
   CSS Custom Properties
   ============================================== */
:root {
  --color-accent:        #2A2A2A;
  --color-accent-dark:   #000000;
  --color-accent-light:  #B9B9B9;
  --color-accent-bg:     #EFEFEF;
  --color-black:       #1C1C1C;
  --color-gray-dark:   #444444;
  --color-gray:        #777777;
  --color-gray-light:  #AAAAAA;
  --color-border:      #E5E5E5;
  --color-bg:          #FFFFFF;
  --color-bg-alt:      #F6F6F7;

  --font-serif:   'Shippori Mincho', 'Times New Roman', serif;
  --font-sans:    'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;

  --container-max: 1080px;
  --container-pad: 24px;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.10);

  --transition: 0.3s ease;

  --section-pad-y: 100px;
}

/* ==============================================
   Reset & Base
   ============================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-black);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

/* ==============================================
   Utilities
   ============================================== */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for card grids */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }

/* ==============================================
   Buttons
   ============================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  border: 2px solid var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-black);
  border: 2px solid var(--color-black);
}

.btn--outline:hover {
  background-color: var(--color-black);
  color: #fff;
}

/* ==============================================
   Section Header (common)
   ============================================== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header__label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header__title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  color: var(--color-black);
  line-height: 1.4;
  margin-bottom: 20px;
}

.section-header__desc {
  font-size: 0.95rem;
  color: var(--color-gray-dark);
  max-width: 520px;
  margin-inline: auto;
  line-height: 1.9;
}

/* ==============================================
   Site Header
   ============================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.site-header__logo-link {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-black);
  text-transform: uppercase;
  transition: color var(--transition);
}

.site-header__logo-link:hover {
  color: var(--color-accent);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 36px;
}

.site-header__nav-link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-gray-dark);
  transition: color var(--transition);
  position: relative;
}

.site-header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

.site-header__nav-link:hover {
  color: var(--color-black);
}

.site-header__nav-link:hover::after {
  width: 100%;
}

.site-header__nav-link--cta {
  background-color: var(--color-accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.06em;
  transition: background-color var(--transition), transform var(--transition);
}

.site-header__nav-link--cta::after {
  display: none;
}

.site-header__nav-link--cta:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* Hamburger */
.site-header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  width: 36px;
}

.site-header__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-black);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}

.site-header__hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.site-header__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.site-header__hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav */
.site-header__nav {
  transition: none;
}

/* ==============================================
   Hero
   ============================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: 120px 80px;
  overflow: hidden;
  background-color: var(--color-bg);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/FV.png');
  background-size: cover;
  background-position: center;
  z-index: 0;
  animation: heroZoom 8s ease-out forwards;
}

@keyframes heroZoom {
  from { transform: scale(1.06); }
  to   { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .hero__bg {
    animation: none;
  }
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.48);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 40px;
  right: calc(50% - 1px);
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--color-accent));
  z-index: 2;
}

.hero__inner {
  position: relative;
  z-index: 2;
}

.hero__content {
  max-width: 680px;
}

.hero__label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.br-sp {
  display: none;
}

.hero__subtitle {
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  font-weight: 600;
  color: #ffffff;
  line-height: 1.7;
  margin-bottom: 40px;
  letter-spacing: 0.01em;
  text-wrap: balance;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.hero .btn--outline {
  color: #fff;
  border-color: #fff;
}

.hero .btn--outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: #fff;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__decoration {
  position: absolute;
  top: 50%;
  right: 80px;
  transform: translateY(-50%);
  pointer-events: none;
}

.hero__decoration-line {
  width: 1px;
  height: 200px;
  background: linear-gradient(to bottom, var(--color-accent-light), transparent);
}

/* ==============================================
   Service
   ============================================== */
.service {
  padding-block: var(--section-pad-y);
  background-color: var(--color-bg);
}

.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service__card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: default;
}

.service__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-light);
}

.service__card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-bg);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  margin-bottom: 20px;
}

.service__card-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 12px;
  line-height: 1.5;
}

.service__card-text {
  font-size: 0.875rem;
  color: var(--color-gray-dark);
  line-height: 1.9;
}

/* ==============================================
   Works
   ============================================== */
.works {
  padding-block: var(--section-pad-y);
  background-color: var(--color-bg-alt);
}

.works__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.works__card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.works__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.works__card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-accent-bg);
}

.works__card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
  transition: transform var(--transition);
}

.works__card:hover .works__card-image img {
  transform: scale(1.04);
}

.works__card-body {
  padding: 28px 32px 32px;
}

.works__card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
}

.works__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.works__tag {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-accent-dark);
  background-color: var(--color-accent-bg);
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.04em;
}

.works__card-text {
  font-size: 0.875rem;
  color: var(--color-gray-dark);
  line-height: 1.9;
  margin-bottom: 20px;
}

.works__card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  transition: gap var(--transition), color var(--transition);
}

.works__card-link:hover {
  color: var(--color-accent-dark);
  gap: 10px;
}

/* ==============================================
   Section CTA (works / pricing 末尾)
   ============================================== */
.section-cta {
  text-align: center;
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.section-cta__text {
  font-size: 0.9rem;
  color: var(--color-gray-dark);
  margin-bottom: 24px;
  line-height: 1.8;
}

/* ==============================================
   Strengths
   ============================================== */
.strengths {
  padding-block: var(--section-pad-y);
  background-color: var(--color-bg);
}

.strengths__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin-inline: auto;
}

.strengths__item {
  display: flex;
  gap: 40px;
  padding-block: 40px;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.strengths__item:first-child {
  border-top: 1px solid var(--color-border);
}

.strengths__item-number {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  min-width: 28px;
  padding-top: 4px;
}

.strengths__item-content {
  flex: 1;
}

.strengths__item-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
  line-height: 1.5;
}

.strengths__item-text {
  font-size: 0.9rem;
  color: var(--color-gray-dark);
  line-height: 1.95;
}

/* ==============================================
   Pricing
   ============================================== */
.pricing {
  padding-block: var(--section-pad-y);
  background-color: var(--color-bg-alt);
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.pricing__card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.pricing__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing__card--featured {
  border-color: var(--color-accent);
  position: relative;
}

.pricing__card--featured::before {
  content: '人気メニュー';
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
}

.pricing__card-header {
  padding: 24px 24px 0;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
}

.pricing__card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-black);
}

.pricing__card-body {
  padding: 20px 24px 28px;
}

.pricing__card-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 10px;
}

.pricing__card-price-from {
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: -0.02em;
}

.pricing__card-price-unit {
  font-size: 1rem;
  color: var(--color-gray);
}

.pricing__card-desc {
  font-size: 0.82rem;
  color: var(--color-gray-dark);
  line-height: 1.8;
}

.pricing__note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-gray);
  line-height: 1.9;
}

/* ==============================================
   Contact
   ============================================== */
.contact {
  padding-block: var(--section-pad-y);
  background-color: var(--color-black);
}

.contact .section-header__label {
  color: var(--color-accent-light);
}

.contact .section-header__title {
  color: #fff;
}

.contact .section-header__desc {
  color: rgba(255, 255, 255, 0.6);
}

.contact__body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.contact__email-label {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--color-accent-light);
  text-transform: uppercase;
}

.contact__email-link {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.04em;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-accent);
  transition: color var(--transition);
}

.contact__email-link:hover {
  color: #fff;
}

.contact__btn {
  margin-top: 8px;
}

.contact__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
}

.contact__badge {
  font-size: 0.75rem;
  color: var(--color-accent-light);
  border: 1px solid rgba(185, 185, 185, 0.35);
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

/* ==============================================
   Site Footer
   ============================================== */
.site-footer {
  background-color: var(--color-black);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: 48px;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}

.site-footer__logo {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
}

.site-footer__nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.site-footer__nav-link {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6); /* 4.5:1+ contrast on #1c1c1c */
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.site-footer__nav-link:hover {
  color: rgba(255,255,255,0.9);
}

.site-footer__copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5); /* 4.5:1+ contrast on #1c1c1c */
  letter-spacing: 0.04em;
}

/* ==============================================
   Floating CTA (mobile only)
   ============================================== */
.floating-cta {
  display: none;
}

@media (max-width: 640px) {
  .floating-cta {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    padding: 12px 20px calc(12px + env(safe-area-inset-bottom));
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--color-border);
    transform: translateY(100%);
    transition: transform 0.35s ease;
  }

  .floating-cta.is-visible {
    transform: translateY(0);
  }

  .floating-cta__link {
    display: block;
    width: 100%;
    padding: 15px 24px;
    background-color: var(--color-accent);
    color: #fff;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition);
  }

  .floating-cta__link:active {
    background-color: var(--color-accent-dark);
  }
}

/* ==============================================
   Responsive — Tablet (max 900px)
   ============================================== */
@media (max-width: 900px) {
  :root {
    --section-pad-y: 80px;
  }

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

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

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

  .hero__decoration {
    display: none;
  }
}

/* ==============================================
   Responsive — Mobile (max 640px)
   ============================================== */
@media (max-width: 640px) {
  :root {
    --section-pad-y: 64px;
    --container-pad: 20px;
  }

  /* Header mobile */
  .site-header__nav {
    display: none;
    position: fixed;
    inset: 70px 0 0 0;
    background-color: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 40px 24px;
    z-index: 99;
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .site-header__nav-link {
    display: block;
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-black);
    padding-block: 18px;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .site-header__nav-link--cta {
    margin-top: 24px;
    background-color: var(--color-accent);
    color: #fff !important;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    border: none;
    display: inline-flex;
    width: auto;
  }

  .site-header__hamburger {
    display: flex;
  }

  /* Hero mobile */
  .hero {
    padding-block: 100px 60px;
    min-height: 100svh;
  }

  .hero::before {
    inset: 0;
  }

  .hero__bg {
    background-position: 65% center;
  }

  .hero__content {
    text-align: center;
  }

  .hero__subtitle {
    font-size: 1.05rem;
  }

  .hero__cta {
    flex-direction: column;
    align-items: center;
  }

  .hero__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .br-sp {
    display: inline;
  }

  /* Service mobile */
  .service__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service__card {
    padding: 28px 24px;
  }

  /* Works mobile */
  .works__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Strengths mobile */
  .strengths__item {
    flex-direction: column;
    gap: 12px;
    padding-block: 32px;
  }

  .strengths__item-number {
    font-size: 0.7rem;
  }

  /* Pricing mobile */
  .pricing__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Section header mobile */
  .section-header {
    margin-bottom: 44px;
  }
}