/* =============================================
   INDiFULL - Global Stylesheet
   White Base / Black Text / Orange Accent
   Refined v3 — 2026.03 (Polish)
   ============================================= */

:root {
  --color-black:    #0a0a0a;
  --color-dark:     #1a1a1a;
  --color-gray-900: #2d2d2d;
  --color-gray-700: #404040;
  --color-gray-600: #555555;
  --color-gray-500: #777777;
  --color-gray-400: #999999;
  --color-gray-300: #bbbbbb;
  --color-gray-200: #dddddd;
  --color-gray-100: #ededed;
  --color-gray-50:  #f8f8f6;
  --color-white:    #ffffff;

  --color-orange:        #E8621A;
  --color-orange-light:  #F07A38;
  --color-orange-dark:   #C4511A;
  --color-orange-bg:     #FFF5EF;
  --color-orange-subtle: #FEF0E6;

  --font-en: 'Inter', sans-serif;
  --font-ja: 'Noto Sans JP', sans-serif;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.05);
  --shadow-md:     0 6px 24px rgba(0,0,0,0.08);
  --shadow-lg:     0 16px 48px rgba(0,0,0,0.11);
  --shadow-orange: 0 8px 24px rgba(232,98,26,0.28);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --max-width: 1200px;
  --nav-height: 72px;

  /* Spacing scale */
  --space-section: 112px;
  --space-section-sm: 80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-ja);
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-ja);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.en { font-family: var(--font-en); }

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* =============================================
   NAVIGATION
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

/* hero 上の白抜きバリアント */
.nav--white {
  background: transparent;
  border-bottom: 1px solid transparent;
}

.nav--white.scrolled {
  background: rgba(255,255,255,0.98);
  border-bottom: 1px solid var(--color-gray-100);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* Logo */
.nav__logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: var(--transition);
}

.nav__logo:hover { opacity: 0.75; }

.nav__logo-name {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--color-dark);
  line-height: 1;
}

.nav__logo-tagline {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--color-gray-400);
  line-height: 1;
  text-transform: uppercase;
}

/* nav--white: hero 上では白文字 */
.nav--white .nav__logo-name    { color: var(--color-white); }
.nav--white .nav__logo-tagline { color: rgba(255,255,255,0.55); }
.nav--white.scrolled .nav__logo-name    { color: var(--color-dark); }
.nav--white.scrolled .nav__logo-tagline { color: var(--color-gray-400); }

/* Menu Links */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-family: var(--font-ja);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-700);
  letter-spacing: 0.03em;
  position: relative;
  transition: var(--transition);
}

.nav--white .nav__link             { color: rgba(255,255,255,0.88); }
.nav--white.scrolled .nav__link    { color: var(--color-gray-700); }

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-orange);
  transition: width 0.25s ease;
  border-radius: 2px;
}

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

.nav__link:hover { color: var(--color-orange); }
.nav--white .nav__link:hover { color: rgba(255,255,255,1); }
.nav--white.scrolled .nav__link:hover { color: var(--color-orange); }

/* CTA button in nav */
.nav__cta {
  background: var(--color-dark) !important;
  color: var(--color-white) !important;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: var(--transition);
}

.nav__cta:hover {
  background: var(--color-orange) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-orange);
}

.nav--white .nav__cta {
  background: rgba(255,255,255,0.15) !important;
  border: 1px solid rgba(255,255,255,0.3);
}

.nav--white .nav__cta:hover {
  background: var(--color-orange) !important;
  border-color: var(--color-orange);
}

.nav--white.scrolled .nav__cta {
  background: var(--color-dark) !important;
  border: none;
}

.nav__cta::after { display: none; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: var(--transition);
  border-radius: 2px;
}

.nav--white .nav__hamburger span              { background: var(--color-white); }
.nav--white.scrolled .nav__hamburger span     { background: var(--color-dark); }

.nav__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Nav */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  padding: 16px 24px 28px;
  z-index: 999;
  box-shadow: var(--shadow-md);
  flex-direction: column;
  gap: 0;
}

.nav__mobile.open { display: flex; }

.nav__mobile-link {
  display: block;
  padding: 15px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.nav__mobile-link:hover { color: var(--color-orange); padding-left: 6px; }

.nav__mobile-cta {
  margin-top: 16px;
  display: block;
  text-align: center;
  background: var(--color-dark);
  color: var(--color-white);
  padding: 14px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.nav__mobile-cta:hover { background: var(--color-orange); }

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 6px;
  font-family: var(--font-ja);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-orange);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-orange-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

.btn--outline {
  background: transparent;
  color: var(--color-dark);
  border: 1.5px solid var(--color-gray-300);
}

.btn--outline:hover {
  border-color: var(--color-dark);
  background: var(--color-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--outline-orange {
  background: transparent;
  color: var(--color-orange);
  border: 1.5px solid var(--color-orange);
}

.btn--outline-orange:hover {
  background: var(--color-orange);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.45);
}

.btn--outline-white:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.7);
}

.btn--lg {
  padding: 17px 40px;
  font-size: 15px;
}

.btn .btn-icon {
  transition: transform 0.22s ease;
  display: inline-block;
}

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

/* =============================================
   SECTION LABELS / TITLES
   ============================================= */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: 14px;
}

.section-label::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-orange);
  border-radius: 2px;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(26px, 4.5vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.section-title--white { color: var(--color-white); }

.section-sub {
  font-size: 15px;
  color: var(--color-gray-500);
  line-height: 1.85;
  max-width: 560px;
  margin-top: 16px;
}

/* Divider */
.divider {
  width: 40px;
  height: 2px;
  background: var(--color-orange);
  border-radius: 2px;
  margin: 20px 0;
}

/* Tag / Chip */
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-orange-bg);
  color: var(--color-orange-dark);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

/* Card Base */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--color-gray-100);
}

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

/* =============================================
   PAGE HEADER (inner pages)
   ============================================= */
.page-header {
  padding: 160px 0 88px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 0% 0%, rgba(232,98,26,0.04) 0%, transparent 55%);
  pointer-events: none;
}

.page-header__inner {
  position: relative;
  z-index: 1;
}

.page-header__label {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: 14px;
}

.page-header__title {
  font-size: clamp(34px, 5.5vw, 58px);
  font-weight: 900;
  color: var(--color-dark);
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.page-header__title span {
  font-family: var(--font-en);
  color: var(--color-orange);
}

.page-header__desc {
  font-size: 15px;
  color: var(--color-gray-500);
  max-width: 500px;
  line-height: 1.85;
}

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-gray-400);
  margin-bottom: 24px;
  font-family: var(--font-en);
  letter-spacing: 0.04em;
}

.breadcrumb a { color: var(--color-gray-400); transition: var(--transition); }
.breadcrumb a:hover { color: var(--color-orange); }
.breadcrumb__sep { color: var(--color-gray-300); }

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--color-white);
  color: var(--color-gray-600);
  padding: 72px 0 32px;
  border-top: 1px solid var(--color-gray-100);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand-name {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: 0.1em;
  margin-bottom: 3px;
}

.footer__brand-tag {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--color-gray-400);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer__brand-desc {
  font-size: 13px;
  line-height: 1.85;
  color: var(--color-gray-500);
  margin-bottom: 18px;
}

.footer__mission {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-600);
  line-height: 1.75;
  padding-left: 12px;
  border-left: 2px solid var(--color-orange);
}

.footer__col-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-gray-400);
  letter-spacing: 0.16em;
  margin-bottom: 18px;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer__links a {
  font-size: 14px;
  color: var(--color-gray-600);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer__links a:hover {
  color: var(--color-orange);
  gap: 10px;
}

.footer__links a::before {
  content: '→';
  font-size: 11px;
  color: var(--color-orange);
  opacity: 0.6;
  transition: opacity 0.2s;
}

.footer__links a:hover::before { opacity: 1; }

/* Instagram link in footer */
.footer__instagram {
  display: inline-flex !important;
  align-items: center;
  gap: 7px;
  color: var(--color-gray-500) !important;
}

.footer__instagram:hover {
  color: var(--color-orange) !important;
}

.footer__instagram::before {
  display: none !important;
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer__info-item {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--color-gray-500);
  line-height: 1.6;
}

.footer__info-label {
  flex-shrink: 0;
  color: var(--color-gray-400);
  font-size: 10px;
  text-transform: uppercase;
  font-family: var(--font-en);
  letter-spacing: 0.08em;
  margin-top: 2px;
  min-width: 44px;
}

.footer__bottom {
  border-top: 1px solid var(--color-gray-100);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__copy {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--color-gray-400);
  letter-spacing: 0.06em;
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-links a {
  font-size: 12px;
  color: var(--color-gray-400);
  transition: var(--transition);
}

.footer__bottom-links a:hover { color: var(--color-orange); }

/* =============================================
   ANIMATIONS
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }
.delay-5 { transition-delay: 0.40s; }

/* page-header に背景写真を入れるバリアント */
.page-header--with-img {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

.page-header--with-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(255,255,255,0.97) 0%,
    rgba(255,255,255,0.85) 48%,
    rgba(255,255,255,0.45) 100%
  );
  z-index: 0;
}

.page-header--with-img .page-header__inner {
  position: relative;
  z-index: 1;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  :root {
    --space-section: 88px;
  }

  .container { padding: 0 24px; }
  .nav__inner { padding: 0 24px; }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
    --space-section: 72px;
  }

  .nav__menu { display: none; }
  .nav__hamburger { display: flex; }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .page-header {
    padding: 116px 0 64px;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .btn { padding: 13px 22px; font-size: 13px; }
  .btn--lg { padding: 15px 30px; font-size: 14px; }
}