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

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  color: #1a1a1a;
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

:root {
  --color-bg: #ffffff;
  --color-bg-light: #f5f4f1;
  --color-bg-dark: #0a0a0a;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-text-light: #ffffff;
  --color-border: #d8d6d2;
  --color-border-dark: #2a2a2a;
  --serif: 'Noto Serif JP', 'Yu Mincho', 'Hiragino Mincho ProN', serif;
  --serif-en: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --max-width: 1200px;
  --header-height: 80px;
}

/* =========================================
   Common Components
   ========================================= */
.section-label {
  font-family: var(--serif-en);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.section-label--light {
  color: var(--color-text-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  min-width: 220px;
}

.btn--outline {
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.btn--dark {
  background: var(--color-bg-dark);
  color: #fff;
  min-width: 180px;
}

.btn--dark:hover {
  background: #2a2a2a;
}

.btn--submit {
  width: 100%;
  background: var(--color-bg-dark);
  color: #fff;
  padding: 1.3rem 2rem;
  justify-content: center;
  gap: 3rem;
  font-size: 1rem;
}

.btn--submit:hover {
  background: #2a2a2a;
}

.arrow {
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.btn:hover .arrow {
  transform: translateX(4px);
}

.logo {
  font-family: var(--serif-en);
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #fff;
}

/* =========================================
   Header
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  background: transparent;
  transition: background 0.3s ease;
}

.header.is-scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header__inner {
  max-width: 1400px;
  height: 100%;
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav__list {
  display: flex;
  gap: 2.5rem;
}

.nav__link {
  color: #fff;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  position: relative;
  padding: 0.25rem 0;
  transition: opacity 0.3s ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: #fff;
  transition: width 0.3s ease;
}

.nav__link:hover::after {
  width: 100%;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
}

.nav__cta:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.nav__cta:hover .arrow {
  transform: translateX(3px);
}

.hamburger {
  display: none;
  width: 32px;
  height: 24px;
  position: relative;
  z-index: 101;
}

.hamburger span {
  display: block;
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: #fff;
  transition: all 0.3s ease;
}

.hamburger span:nth-child(1) { top: 4px; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 4px; }

.hamburger.is-open span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* =========================================
   Hero
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  padding: var(--header-height) 0 4rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(105deg,
      rgba(10, 10, 10, 1) 0%,
      rgba(10, 10, 10, 1) 38%,
      rgba(10, 10, 10, 0.85) 45%,
      rgba(10, 10, 10, 0.3) 55%,
      rgba(10, 10, 10, 0.1) 100%
    ),
    url('image/hero.png');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 75% 35%, rgba(255, 200, 130, 0.08) 0%, transparent 50%);
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 0 3rem;
}

.hero__title {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
  animation: fadeUp 1s ease 0.2s both;
}

.hero__lead {
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  line-height: 2;
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.85);
  animation: fadeUp 1s ease 0.4s both;
}

.hero .btn--outline {
  animation: fadeUp 1s ease 0.6s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================
   Mission
   ========================================= */
.mission {
  background: var(--color-bg-light);
}

.mission__container {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-height: 480px;
}

.mission__text {
  padding: 6rem 3rem 6rem 8%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mission__title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.6vw, 2.25rem);
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.03em;
  margin-bottom: 2.5rem;
}

.mission__desc {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.mission__visual {
  background-image: url('image/mission.png');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.mission__visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.1) 100%);
}

/* =========================================
   About
   ========================================= */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 520px;
}

.about__visual {
  background-image: url('image/about.png');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.about__visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.05) 100%);
}

.about__content {
  padding: 6rem 8% 6rem 5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about__title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 2.6vw, 2.3rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.03em;
  margin-bottom: 2rem;
}

.about__desc {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 2.5rem;
}

/* =========================================
   Service
   ========================================= */
.service {
  background: var(--color-bg-dark);
  color: #fff;
  padding: 5rem 0 6rem;
}

.service__head {
  max-width: var(--max-width);
  margin: 0 auto 3rem;
  padding: 0 3rem;
  display: flex;
  align-items: baseline;
  gap: 4rem;
}

.service__intro {
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  letter-spacing: 0.05em;
}

.service__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 3rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.service-card {
  background: #fff;
  color: var(--color-text);
  padding: 2.5rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 230px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.service-card__icon {
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.service-card__title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.service-card__desc {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

/* =========================================
   Company
   ========================================= */
.company {
  padding: 5rem 0;
  background: #fff;
}

.company__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 3rem;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
}

.company__table {
  border-top: 1px solid var(--color-border);
}

.company__row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 2rem;
  padding: 1.1rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.company__row dt {
  color: var(--color-text);
  font-weight: 500;
}

.company__row dd {
  color: var(--color-text-muted);
}

.company__visual {
  height: 100%;
  min-height: 320px;
  background-image: url('image/company.png');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.company__visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.05) 100%);
}

/* =========================================
   Contact
   ========================================= */
.contact {
  background: var(--color-bg-light);
  padding: 5rem 0;
}

.contact__container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 4rem;
}

.contact__head {
  padding-top: 0.5rem;
}

.contact__title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.5;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding-top: 0.85rem;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1.1rem;
  font-family: inherit;
  font-size: 0.95rem;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: border-color 0.3s ease;
}

.form-input::placeholder {
  color: #b0afac;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-bg-dark);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
  font-family: inherit;
  line-height: 1.7;
}

.form-submit {
  margin-top: 1rem;
  margin-left: calc(140px + 1.5rem);
}

/* =========================================
   Footer
   ========================================= */
.footer {
  background: var(--color-bg-dark);
  color: #fff;
  padding: 1.5rem 0;
}

.footer__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.logo--footer {
  font-size: 1.4rem;
}

.footer__nav {
  display: flex;
  gap: 2rem;
}

.footer__nav a {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: opacity 0.3s ease;
}

.footer__nav a:hover {
  opacity: 0.7;
}

.footer__copy {
  margin-left: auto;
  font-family: var(--serif-en);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.7);
}

/* =========================================
   Responsive — Tablet
   ========================================= */
@media (max-width: 1024px) {
  .header__inner,
  .hero__content,
  .service__head,
  .service__grid,
  .company__container,
  .contact__container,
  .footer__inner {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .nav__list {
    gap: 1.75rem;
  }

  .nav {
    gap: 1.75rem;
  }

  .mission__text,
  .about__content {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .mission__container {
    grid-template-columns: 1.5fr 1fr;
  }

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

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

  .company__visual {
    min-height: 240px;
  }
}

/* =========================================
   Responsive — Mobile
   ========================================= */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .header__inner {
    padding: 0 1.25rem;
  }

  .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    transform: translateX(100%);
    transition: transform 0.4s ease;
  }

  .nav.is-open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: 1.75rem;
  }

  .nav__link {
    font-size: 1.15rem;
  }

  .nav__cta {
    padding: 0.85rem 1.75rem;
  }

  .hamburger {
    display: block;
  }

  .hero {
    min-height: 90vh;
    padding: var(--header-height) 0 3rem;
  }

  .hero__content {
    padding: 0 1.25rem;
  }

  .hero__bg {
    background:
      linear-gradient(180deg,
        #0a0a0a 0%,
        #0a0a0a 50%,
        rgba(10, 10, 10, 0.6) 70%,
        rgba(10, 10, 10, 0) 100%
      ),
      linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 50%, #4a4a4a 100%);
  }

  .hero__title {
    font-size: 2.2rem;
    line-height: 1.4;
    margin-bottom: 1.5rem;
  }

  .hero__lead {
    font-size: 0.9rem;
    line-height: 1.9;
    margin-bottom: 2.5rem;
  }

  .hero__lead br {
    display: none;
  }

  .btn {
    min-width: 200px;
    padding: 1rem 1.5rem;
    gap: 1.5rem;
  }

  /* Mission */
  .mission__container {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .mission__text {
    padding: 3.5rem 1.25rem;
  }

  .mission__visual {
    min-height: 200px;
  }

  .mission__title {
    font-size: 1.35rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
  }

  .mission__title br {
    display: none;
  }

  .mission__desc {
    font-size: 0.85rem;
  }

  .mission__desc br {
    display: none;
  }

  /* About */
  .about {
    grid-template-columns: 1fr;
  }

  .about__visual {
    min-height: 220px;
    order: -1;
  }

  .about__content {
    padding: 3.5rem 1.25rem;
  }

  .about__title {
    font-size: 1.5rem;
  }

  .about__desc {
    font-size: 0.9rem;
  }

  .about__desc br {
    display: none;
  }

  /* Service */
  .service {
    padding: 3.5rem 0 4rem;
  }

  .service__head {
    flex-direction: column;
    gap: 1rem;
    padding: 0 1.25rem;
    margin-bottom: 2rem;
  }

  .service__intro {
    font-size: 0.9rem;
  }

  .service__grid {
    grid-template-columns: 1fr;
    padding: 0 1.25rem;
    gap: 0.75rem;
  }

  .service-card {
    padding: 2rem 1.25rem;
    min-height: auto;
  }

  /* Company */
  .company {
    padding: 3.5rem 0;
  }

  .company__container {
    padding: 0 1.25rem;
    gap: 2rem;
  }

  .company__row {
    grid-template-columns: 100px 1fr;
    gap: 1rem;
    padding: 1rem 0.25rem;
    font-size: 0.82rem;
  }

  .company__visual {
    min-height: 200px;
  }

  /* Contact */
  .contact {
    padding: 3.5rem 0;
  }

  .contact__container {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 0 1.25rem;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .form-label {
    padding-top: 0;
  }

  .form-submit {
    margin-left: 0;
  }

  .btn--submit {
    gap: 1.5rem;
    padding: 1.1rem 1.5rem;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    gap: 1.25rem;
    padding: 1rem 1.25rem;
    text-align: center;
  }

  .footer__nav {
    gap: 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer__copy {
    margin-left: 0;
    font-size: 0.78rem;
  }
}

/* =========================================
   Reduce motion
   ========================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================
   Logo Styles
   ========================================= */
.logo-img {
  height: 70px;
  width: auto;
  display: block;
}

@media (max-width: 768px) {
  .logo-img {
    height: 70px;
  }
}