/* ========================================
   Variables
   ======================================== */
:root {
  --color-bg: #f7f5f2;
  --color-bg-alt: #eeebe6;
  --color-surface: #ffffff;
  --color-primary: #1c2b3a;
  --color-primary-light: #2d4156;
  --color-accent: #8b7355;
  --color-accent-light: #a89070;
  --color-text: #2a2a2a;
  --color-text-muted: #6b6b6b;
  --color-border: #e0dcd6;
  --color-border-light: #ece8e3;

  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", serif;

  --header-height: 64px;
  --container: 1240px;
  --gutter: clamp(20px, 3vw, 48px);
  --gutter-mobile: 20px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(28, 43, 58, 0.06);
  --shadow-md: 0 8px 32px rgba(28, 43, 58, 0.08);
  --shadow-lg: 0 16px 48px rgba(28, 43, 58, 0.1);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: clamp(16px, 1.05vw, 18px);
}

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

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

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

ul {
  list-style: none;
}

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

/* ========================================
   Utilities
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.sp-only {
  display: none;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn--ghost:hover {
  border-color: var(--color-primary);
  background: rgba(28, 43, 58, 0.04);
}

.btn--block {
  width: 100%;
}

/* ========================================
   Section Common
   ======================================== */
.section {
  padding: 120px 0;
}

.section__header {
  margin-bottom: 64px;
}

.section__header--center {
  text-align: center;
}

.section__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

.section__desc {
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  max-width: 560px;
}

.section__header--center .section__desc {
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: var(--transition);
}

.header.is-scrolled {
  background: rgba(247, 245, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

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

.header__logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.header__logo-en {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.header__logo-ja {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
}

.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 1001;
}

.header__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
  transform-origin: center;
}

.header__toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.header__toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__nav-list a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.header__nav-list a:not(.header__cta):hover {
  color: var(--color-primary);
}

.header__nav-list a:not(.header__cta)::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.header__nav-list a:not(.header__cta):hover::after {
  width: 100%;
}

.header__cta {
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius);
  font-weight: 600;
}

.header__cta:hover {
  background: var(--color-primary-light);
}

/* ========================================
   Hero
   ======================================== */
.hero {
  background: radial-gradient(70% 50% at 15% 50%, rgba(139, 115, 85, 0.1) 0%, transparent 60%), #f7f5f2;
  padding: var(--header-height) 0 0;
  overflow: hidden;
}

.hero__viewport {
  width: 100%;
  overflow: hidden;
  display: flex;
  justify-content: center;
}

.hero__scale {
  overflow: hidden;
  flex-shrink: 0;
}

.hero__inner {
  width: 1166px;
  padding: 0 24px;
  box-sizing: border-box;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  transform-origin: top left;
  transform: scale(min(1, 100vw / 1166));
}

.hero__content {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 0;
}

.hero__media {
  flex: 0 0 46%;
  max-width: 500px;
}

.hero__photo {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero__limit {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  background: #1c2b3a;
  color: #fff;
  border-radius: 16px;
  padding: 14px 22px;
  font-size: 19px;
}

.hero__limit-label {
  width: 100%;
  font-size: 1em;
  font-weight: 600;
  letter-spacing: 0.06em;
  opacity: 0.9;
  line-height: 1.3;
}

.hero__limit-num {
  font-family: var(--font-serif);
  font-size: 2.5em;
  font-weight: 700;
  line-height: 1;
}

.hero__limit-unit {
  font-size: 1.125em;
  font-weight: 700;
}

.hero__limit-note {
  font-size: 1em;
  font-weight: 500;
  opacity: 0.9;
  line-height: 1.3;
}

.hero__title {
  margin: 0;
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  font-size: 52px;
  line-height: 1.35;
  color: #1c2b3a;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(transparent 62%, rgba(139, 115, 85, 0.2) 62%);
}

.hero__lead {
  margin: 0;
  font-size: 24px;
  line-height: 1.85;
  color: #6b6b6b;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  font-size: 22px;
  color: #fff;
  background: #1c2b3a;
  border-radius: 8px;
  padding: 22px 52px;
}

/* ========================================
   Challenge
   ======================================== */
.challenge {
  background: var(--color-surface);
}

.challenge__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.challenge__card {
  padding: 36px 28px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
}

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

.challenge__num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-light);
  opacity: 0.5;
  margin-bottom: 16px;
  line-height: 1;
}

.challenge__card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.challenge__card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.challenge__closing {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--color-primary);
  line-height: 2;
  max-width: 640px;
  margin: 0 auto;
}

/* ========================================
   Profile
   ======================================== */
.profile {
  background: var(--color-bg-alt);
}

.profile__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: start;
}

.profile__header .section__title {
  margin-bottom: 8px;
}

.profile__role {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}

.profile__bio {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.9;
}

.profile__timeline {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.profile__timeline li {
  display: block;
  padding: 14px 16px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border-light);
}

.profile__timeline li:last-child {
  border-bottom: 1px solid var(--color-border-light);
}

.profile__year {
  display: block;
  flex-shrink: 0;
  width: auto;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.profile__event {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========================================
   Features
   ======================================== */
.features {
  background: var(--color-surface);
}

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

.features__card {
  padding: 36px 32px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.features__card:hover {
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-sm);
}

.features__banner {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 32px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  color: #fff;
}

.features__banner-num {
  flex-shrink: 0;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent-light);
  opacity: 0.6;
  line-height: 1;
  padding-top: 2px;
}

.features__banner-body {
  flex: 1;
  min-width: 0;
}

.features__banner-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.45;
}

.features__banner-body p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.75;
}

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

.features__icon svg {
  width: 24px;
  height: 24px;
}

.features__card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.features__card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ========================================
   Reasons
   ======================================== */
.reasons {
  background: var(--color-bg);
}

.reasons__list {
  max-width: 800px;
  margin: 0 auto;
}

.reasons__item {
  display: flex;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.reasons__item:first-child {
  padding-top: 0;
}

.reasons__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.reasons__num {
  flex-shrink: 0;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent-light);
  opacity: 0.4;
  line-height: 1;
  width: 48px;
}

.reasons__content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.reasons__content p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

/* ========================================
   Pricing
   ======================================== */
.pricing {
  background: var(--color-bg-alt);
}

.pricing__card {
  max-width: 560px;
  margin: 0 auto;
  padding: 48px 40px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  text-align: center;
}

.pricing__badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  padding: 6px 16px;
  border: 1px solid var(--color-accent-light);
  border-radius: 100px;
  margin-bottom: 24px;
}

.pricing__amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 8px;
}

.pricing__currency {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.pricing__price {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.pricing__unit {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.pricing__tax {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing__contract {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 28px;
}

.pricing__includes-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: left;
  margin-bottom: 12px;
}

.pricing__includes {
  text-align: left;
  margin-bottom: 24px;
  padding: 24px;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.pricing__includes li {
  position: relative;
  padding-left: 24px;
  font-size: 1rem;
  color: var(--color-text);
  line-height: 2;
}

.pricing__includes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

.pricing__note {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  text-align: left;
  margin-bottom: 32px;
}

.pricing__note strong {
  color: var(--color-primary);
  font-weight: 600;
}

.story {
  max-width: 720px;
  margin: 80px auto 0;
  padding: 40px 36px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.story__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
  margin-bottom: 20px;
  text-align: center;
}

.story__text {
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--color-text);
}

/* ========================================
   FAQ
   ======================================== */
.faq {
  background: var(--color-surface);
}

.faq__list {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border-light);
}

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

.faq__q {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.faq__a {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin: 0;
}

/* ========================================
   Contact
   ======================================== */
.contact {
  background: var(--color-surface);
}

.contact__action {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.contact__btn {
  font-size: 1.0625rem;
  padding: 18px 32px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: 40px 0;
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__logo-en {
  display: block;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-accent-light);
}

.footer__logo-ja {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

.footer__copy {
  font-size: 0.75rem;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
    --gutter: var(--gutter-mobile);
  }

  .section {
    padding: 80px 0;
  }

  .section__header {
    margin-bottom: 40px;
  }

  .sp-only {
    display: inline;
  }

  .header__toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    inset: 0;
    background: rgba(247, 245, 242, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .header__nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .header__nav-list {
    flex-direction: column;
    gap: 28px;
    text-align: center;
  }

  .header__nav-list a {
    font-size: 1.0625rem;
  }

  .header__cta {
    padding: 14px 32px;
    font-size: 1rem;
  }

  .challenge__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .profile__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .features__banner {
    flex-direction: column;
    gap: 12px;
    padding: 24px 20px;
  }

  .features__banner-num {
    font-size: 1.75rem;
    padding-top: 0;
  }

  .reasons__item {
    flex-direction: column;
    gap: 12px;
    padding: 28px 0;
  }

  .reasons__num {
    font-size: 1.75rem;
  }

  .pricing__card {
    padding: 36px 24px;
  }

  .pricing__price {
    font-size: 3rem;
  }

  .story {
    margin-top: 48px;
    padding: 28px 20px;
  }

  .story__title {
    font-size: 1.25rem;
  }

  .faq__q {
    font-size: 1rem;
  }

  .footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .challenge__card {
    padding: 28px 20px;
  }
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }