/* ================================================
   I BE DESIGN - Complete Stylesheet v3.0
   Pixel-Perfect Recreation
   ================================================ */

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #fd941d;
  --color-primary-hover: #e8850a;
  --color-primary-dark: #c97008;
  --color-text-dark: #141414;
  --color-text-gray: rgb(68, 68, 68);
  --color-text-secondary: #444444;
  --color-text-light: #9CA3AF;
  --color-text-white: #ffffff;
  --color-bg-white: #ffffff;
  --color-bg-about: rgb(243, 244, 250);
  --color-bg-light: #F9FAFB;
  --color-bg-dark: #000000;
  --color-overlay-dark: rgba(0, 0, 0, 0.23);
  --color-header-scrolled: rgba(255, 255, 255, 0.2);
  --color-border: #E5E7EB;
  --color-button-secondary: #DADBE1;
  
  /* Typography */
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Sizes */
  --header-height: 66px;
  --container-max-width: 1280px;
  --container-padding: 24px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-gray);
  background-color: var(--color-bg-white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

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

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

ul, ol {
  list-style: none;
}

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

/* ================================================
   HEADER - 修正版
   ================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: transparent;
  z-index: 1000;
  transition: background-color var(--transition-slow), backdrop-filter var(--transition-slow), transform var(--transition-slow);
}

.header.is-hidden {
  transform: translateY(-100%);
}

.header.is-scrolled {
  background-color: var(--color-header-scrolled);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* 下層ページ：デフォルトで薄い白を表示 */
.header--subpage {
  background-color: rgba(0, 0, 0, 0.03);
}

.header--subpage.is-scrolled {
  background-color: var(--color-header-scrolled);
}

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

/* Logo: Dアイコン + テキスト */
.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header__logo-icon {
  height: 40px;
  width: auto;
}

/* Navigation */
.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
  margin-right: 32px;
}

.header__nav-link {
  color: rgb(68, 68, 68);
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-style: normal;
  font-size: 14px;
  letter-spacing: 0px;
  line-height: 1.5em;
  transition: color var(--transition-fast);
  position: relative;
}

/* 中央から左右に広がるアンダーライン */
.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.header__nav-link:hover::after,
.header__nav-item--dropdown:hover > .header__nav-link::after {
  width: calc(100% + 4px);
}

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

.header__nav-chevron {
  display: inline-block;
  margin-left: 4px;
  vertical-align: middle;
  position: relative;
  top: -1px;
  color: rgb(68, 68, 68);
  transition: color var(--transition-fast);
}

.header__nav-link:hover .header__nav-chevron {
  color: var(--color-primary);
}

/* ドロップダウン */
.header__nav-item {
  position: relative;
}

.header__dropdown {
  position: absolute;
  top: calc(100% + 17px);
  left: -15px;
  background-color: #f7f7f7;
  width: 230px;
  height: 100px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  border-top: 3px solid #000000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-13px);
  transition: opacity 0.4s ease 0.3s, transform 0.4s ease 0.3s, visibility 0.4s ease 0.3s;
  z-index: 100;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.header__nav-item--dropdown:hover .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.4s ease 0.3s, transform 0.4s ease 0.3s, visibility 0s ease 0s;
}

.header__dropdown-link {
  display: block;
  padding: 4px 24px;
  font-family: 'Poppins', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: rgb(68, 68, 68);
  letter-spacing: 0.03em;
  transition: transform var(--transition-fast);
}

.header__dropdown-link:hover {
  transform: translateX(5px);
}

/* CTA Button - 106.77 × 37px */
.header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 106.77px;
  height: 37px;
  padding: 12px 29px;
  background-color: var(--color-primary);
  color: var(--color-text-white);
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-size: 12px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

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

/* Mobile Menu Toggle */
.header__mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  padding: 5px;
}

.header__mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-gray);
  transition: transform var(--transition-base), opacity var(--transition-base);
}


/* ================================================
   SHARED DOT ANIMATION
   ================================================ */
@keyframes dotExpand {
  0%   { width: 6px; }
  100% { width: 16px; }
}

/* ================================================
   SLIDER COMMON STYLES
   ================================================ */
.slider {
  position: relative;
}

.slider__track {
  display: flex;
  transition: transform 0.5s ease;
}

.slider__slide {
  flex: 0 0 100%;
}

/* Arrows */
.slider__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-gray);
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  z-index: 10;
}

.slider__arrow:hover {
  background-color: var(--color-bg-white);
  transform: translateY(-50%) scale(1.1);
}

.slider__arrow--prev {
  left: 24px;
}

.slider__arrow--next {
  right: 24px;
}

/* Dots - Pill Style */
.slider__dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.slider__dots--pill .slider__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.5);
  transition: width var(--transition-base), background-color var(--transition-base);
}

.slider__dots--pill .slider__dot.is-active {
  width: 24px;
  background-color: var(--color-primary);
}


/* ================================================
   FOOTER
   ================================================ */
.footer {
  background-color: #f7f7f7;
  padding: 48px 0;
}

.footer__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  text-align: center;
}

.footer__logo {
  display: inline-block;
  margin-bottom: 24px;
}

.footer__logo-img {
  height: 40px;
  width: auto;
  margin: 0 auto;
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.footer__logo:hover .footer__logo-img {
  opacity: 1;
}

.footer__copyright {
  font-family: 'Poppins', sans-serif;
  font-size: 14px;
  color: rgba(0, 0, 0, 0.4);
}

/* ================================================
   BACK TO TOP
   ================================================ */
.back-to-top {
  position: fixed;
  bottom: 17px;
  right: 17px;
  width: 50px;
  height: 50px;
  background-color: rgba(20, 20, 20, 0.3);
  color: var(--color-text-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), background-color var(--transition-fast);
  z-index: 999;
  cursor: pointer;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: #b8b9be;
  transform: translateY(-4px);
}

/* ================================================
   SCROLL PROGRESS
   ================================================ */
.scroll-progress {
  display: none;
}

/* ================================================
   COMMON RESPONSIVE STYLES
   ================================================ */
@media (max-width: 1024px) {
  :root {
    --header-height: 60px;
    --container-padding: 16px;
  }

  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .header__mobile-toggle {
    display: flex !important;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .slider__arrow {
    width: 36px;
    height: 36px;
  }

  .slider__arrow--prev {
    left: 12px;
  }

  .slider__arrow--next {
    right: 12px;
  }
}

/* ================================================
   ANIMATIONS
   ================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Scroll Animations */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].is-animated {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger Children */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

[data-stagger].is-animated > *:nth-child(1) { transition-delay: 0.1s; }
[data-stagger].is-animated > *:nth-child(2) { transition-delay: 0.2s; }
[data-stagger].is-animated > *:nth-child(3) { transition-delay: 0.3s; }
[data-stagger].is-animated > *:nth-child(4) { transition-delay: 0.4s; }

[data-stagger].is-animated > * {
  opacity: 1;
  transform: translateY(0);
}
/* ================================================
   ADDITIONS: モバイルメニュー・ヘッダー挙動
   (既存スタイルには一切触れず、末尾に追記のみ)
   ================================================ */

/* モバイルメニュー展開時 */
@media (max-width: 1024px) {
  .header__nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: #ffffff;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    z-index: 999;
    padding: 0 var(--container-padding);
    overflow-y: auto;
  }

  .header__nav.is-open .header__nav-link,
  .header__nav.is-open .header__nav-item {
    width: 100%;
    border-bottom: 1px solid #e8e8e8;
  }

  .header__nav.is-open .header__nav-link {
    display: block;
    font-family: 'Poppins', sans-serif;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-text-dark);
    text-transform: uppercase;
    padding: 22px 0;
  }

  .header__nav.is-open .header__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
    background: none;
    box-shadow: none;
    border-top: none;
    width: 100%;
    height: auto;
    padding: 0;
    gap: 0;
    display: flex;
    flex-direction: column;
  }

  .header__nav.is-open .header__dropdown-link {
    font-family: 'Poppins', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--color-text-gray);
    text-transform: uppercase;
    padding: 18px 16px;
    border-bottom: 1px solid #e8e8e8;
  }

  .header__nav.is-open .header__dropdown-link:hover {
    transform: none;
  }
  /* ハンバーガー → ✕ */
  .header__mobile-toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .header__mobile-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }
  .header__mobile-toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}
/* Shared pill button */
.about__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 146.09px;
  height: 47.66px;
  padding: 17px 36px;
  background-color: var(--color-button-secondary);
  color: var(--color-text-white);
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-size: 14px;
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.about__button:hover {
  background-color: #b8b9be;
  transform: translateY(-2px);
}

/* ================================================
   GHOST BUTTON — news__button / blog more button
   ================================================ */
.news__button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background-color: transparent;
  color: var(--color-text-secondary);
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.06em;
  border: 1.5px solid var(--color-text-secondary);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.news__button::after {
  content: '→';
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.news__button:hover {
  background-color: var(--color-text-secondary);
  color: #fff;
  transform: translateY(-2px);
}

.news__button:hover::after {
  transform: translateX(4px);
}

/* ================================================
   SUB-PAGE HERO — 下層ページ共通ヒーロー
   ================================================ */
.blog-hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background-color: #f7f7f7;
}

.blog-hero__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.blog-hero__label {
  display: block;
  font-family: 'Poppins', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.blog-hero__title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(36px, 6vw, 80px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text-dark);
  line-height: 1;
  margin-bottom: 24px;
}

.blog-hero__sub {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-gray);
  max-width: 560px;
}

@media (max-width: 540px) {
  .blog-hero {
    padding-top: calc(var(--header-height) + 48px);
    padding-bottom: 48px;
  }

  .blog-hero__title {
    font-size: 40px;
  }
}