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

:root {
  --color-primary: #C9A84C;
  --color-primary-dark: #a8883a;
  --color-bg: #0a0a0a;
  --color-bg-2: #111111;
  --color-bg-3: #1a1a1a;
  --color-text: #f0f0f0;
  --color-text-muted: #888888;
  --color-border: #2a2a2a;
  --color-line: #06C755;
  --font-en: 'Montserrat', sans-serif;
  --font-ja: 'Noto Sans JP', sans-serif;
  --radius: 8px;
  --transition: 0.3s ease;
  --max-width: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ja);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===========================
   UTILITY
=========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 100px 0; }

.section__header {
  text-align: center;
  margin-bottom: 64px;
}

.section__label {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.3;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 4px;
  font-family: var(--font-ja);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn--sm { padding: 9px 20px; font-size: 13px; }

.btn--primary {
  background-color: var(--color-primary);
  color: #000;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: rgba(255,255,255,0.4);
}
.btn--outline:hover {
  border-color: var(--color-text);
  background-color: rgba(255,255,255,0.05);
}

.btn--white {
  background-color: #fff;
  color: #000;
  border-color: #fff;
}
.btn--white:hover {
  background-color: transparent;
  color: #fff;
}

.btn--line {
  background-color: var(--color-line);
  color: #fff;
  border-color: var(--color-line);
}
.btn--line:hover {
  background-color: #05a848;
  border-color: #05a848;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6, 199, 85, 0.3);
}

.btn__icon { width: 20px; height: 20px; flex-shrink: 0; }

/* ===========================
   HEADER
=========================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--transition), padding var(--transition);
}

.header.scrolled {
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
}

.header__logo img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.header__nav-list a:not(.btn) {
  position: relative;
  padding-bottom: 4px;
}
.header__nav-list a:not(.btn)::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background-color: var(--color-primary);
  transition: width var(--transition);
}
.header__nav-list a:not(.btn):hover::after { width: 100%; }

.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.header__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background-color: var(--color-text);
  transition: var(--transition);
}
.header__hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.header__hamburger.active span:nth-child(2) { opacity: 0; }
.header__hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===========================
   HERO
=========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__image {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__image img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(0,0,0,0.82) 0%,
    rgba(0,0,0,0.55) 55%,
    rgba(0,0,0,0.3) 100%
  );
  z-index: 1;
}

/* 画像がない場合の背景 */
.hero__image:not(:has(img[src])) {
  background: linear-gradient(135deg, #0d0d0d 0%, #1a1a1a 50%, #0f0f0f 100%);
}
.hero__image:not(:has(img[src]))::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(201, 168, 76, 0.07) 0%, transparent 60%);
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 140px 24px 100px;
  max-width: 700px;
  margin-left: calc((100vw - var(--max-width)) / 2 + 24px);
}

.hero__label {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--color-primary);
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero__title {
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero__desc {
  font-size: clamp(13px, 1.8vw, 16px);
  color: rgba(240,240,240,0.75);
  line-height: 1.9;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.8s forwards;
}

.hero__link {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  transition: letter-spacing var(--transition);
}
.hero__link:hover { letter-spacing: 0.1em; }

.hero__scroll {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  opacity: 0;
  animation: fadeUp 0.8s 1.2s forwards;
}
.hero__scroll span {
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: rgba(240,240,240,0.4);
}
.hero__scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  animation: scrollLine 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

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

/* ===========================
   SERVICES
=========================== */
.services { background-color: var(--color-bg-2); }

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.service-card {
  background-color: var(--color-bg-3);
  padding: 44px 40px;
  transition: background-color var(--transition);
  position: relative;
}
.service-card:hover { background-color: #202020; }

.service-card__num {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.service-card__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.4;
}

.service-card__text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.85;
  margin-bottom: 24px;
}

.service-card__link {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  transition: letter-spacing var(--transition);
}
.service-card__link:hover { letter-spacing: 0.12em; }

/* ===========================
   WHY
=========================== */
.why { background-color: var(--color-bg); }

.why__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-card {
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.why-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.why-card__icon {
  font-family: var(--font-en);
  font-size: 32px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.why-card__title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 12px;
}

.why-card__text {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.85;
}

/* ===========================
   FOR YOU
=========================== */
.for-you { background-color: var(--color-bg-2); }

.for-you__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.for-you__col {
  background-color: var(--color-bg-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 48px 40px;
}

.for-you__header { margin-bottom: 32px; }

.for-you__category {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.for-you__title {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 700;
  line-height: 1.4;
}

.for-you__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.for-you__list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.for-you__list li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.for-you__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* ===========================
   CASES
=========================== */
.cases { background-color: var(--color-bg); }

.cases__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.case-card {
  background-color: var(--color-bg-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201,168,76,0.3);
}

.case-card__image {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: #1e1e1e;
}
.case-card__image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.case-card:hover .case-card__image img { transform: scale(1.04); }

/* 画像がない場合 */
.case-card__image.no-image::after {
  content: 'PHOTO';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
}

.case-card__badge {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--font-ja);
  font-size: 11px;
  font-weight: 700;
  background-color: var(--color-primary);
  color: #000;
  padding: 4px 10px;
  border-radius: 2px;
}

.case-card__body { padding: 28px; }

.case-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.case-card__quote {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.85;
  padding-left: 12px;
  border-left: 2px solid var(--color-border);
  font-style: italic;
}

.cases__more { text-align: center; }

/* ===========================
   ABOUT
=========================== */
.about {
  background: linear-gradient(135deg, var(--color-bg-2) 0%, var(--color-bg) 100%);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__content .section__label { margin-bottom: 16px; }

.about__title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}

.about__text {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 14px;
}
.about__content .btn { margin-top: 16px; }

.about__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background-color: var(--color-bg-3);
  padding: 36px 28px;
  text-align: center;
}

.stat__value {
  font-family: var(--font-en);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat__value span { font-size: 0.6em; }

.stat__label {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ===========================
   CTA
=========================== */
.cta {
  background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
  border-top: 1px solid var(--color-border);
  padding: 100px 0;
  text-align: center;
}

.cta__label {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.cta__title {
  font-size: clamp(22px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
}

.cta__desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 48px;
}

.cta__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===========================
   FOOTER
=========================== */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 32px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__logo {
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.footer__cols {
  display: flex;
  gap: 60px;
}

.footer__col-title {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__col a {
  font-size: 13px;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--color-primary); }

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
}

.footer__copy {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ===========================
   SCROLL ANIMATION
=========================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 1024px) {
  .why__grid { grid-template-columns: repeat(2, 1fr); }
  .about__inner { gap: 48px; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  /* Header */
  .header__hamburger { display: flex; }

  .header__nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: 280px;
    background-color: var(--color-bg-2);
    border-left: 1px solid var(--color-border);
    padding: 80px 32px;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
  }
  .header__nav.open { transform: translateX(0); }

  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
    font-size: 14px;
  }

  /* Hero */
  .hero__content {
    margin-left: 0;
    padding: 120px 24px 80px;
  }
  .hero__actions { flex-direction: column; align-items: flex-start; }

  /* Services */
  .services__grid { grid-template-columns: 1fr; }

  /* Why */
  .why__grid { grid-template-columns: repeat(2, 1fr); }

  /* For You */
  .for-you__grid { grid-template-columns: 1fr; }

  /* Cases */
  .cases__grid { grid-template-columns: 1fr; }

  /* About */
  .about__inner { grid-template-columns: 1fr; gap: 48px; }
  .about__stats { grid-template-columns: repeat(2, 1fr); }

  /* Footer */
  .footer__inner { flex-direction: column; gap: 36px; }
  .footer__cols { flex-direction: column; gap: 28px; }
}

@media (max-width: 480px) {
  .why__grid { grid-template-columns: 1fr; }
  .cta__actions { flex-direction: column; width: 100%; }
  .cta__actions .btn { width: 100%; }
}