/* ========================================
   CSS Variables（元のv1色合いを維持）
======================================== */
:root {
  /* カラー（設計書より） */
  --color-primary: #E85A5A;
  --color-primary-dark: #D14545;
  --color-accent: #2F6F73;
  --color-accent-light: #3A8A8F;
  --color-bg: #FFF8F2;
  --color-bg-white: #FFFFFF;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #E5E0DB;
  --color-line: #06C755;

  /* フォント（システムフォント） */
  --font-sans: "游ゴシック", "Yu Gothic", "YuGothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;

  /* サイズ */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;

  /* スペーシング */
  --space-section: 80px;
  --space-content: 32px;
  --space-element: 16px;

  /* 幅 */
  --max-width: 1000px;

  /* トランジション */
  --transition: 0.3s ease;

  /* 角丸 */
  --radius: 8px;
  --radius-lg: 16px;

  /* コマ枠風ボーダー */
  --border-frame: 3px solid var(--color-text);
}

@media (min-width: 768px) {
  :root {
    --space-section: 100px;
    --text-3xl: 2rem;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

ul {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.accent {
  color: var(--color-primary);
}

/* ========================================
   エフェクト1: BG-NOISE（紙のざらつき）
======================================== */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ========================================
   エフェクト2: SCR-SNAP（スナップスクロール）
======================================== */
@media (min-width: 768px) {
  .snap-container {
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
  }

  .snap-section {
    scroll-snap-align: start;
    min-height: 100vh;
  }
}

/* ========================================
   エフェクト5: HEAD-TRANSPARENT（透明ヘッダー）
======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.header.is-scrolled {
  background: rgba(255, 248, 242, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.header__logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.header__toggle.is-active .header__toggle-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.header__toggle.is-active .header__toggle-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   Navigation（全画面オーバーレイ）
======================================== */
.nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

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

.nav__menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.nav__link {
  font-size: var(--text-lg);
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

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

.nav__link--cta {
  background: var(--color-primary);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius);
}

.nav__link--cta::after {
  display: none;
}

/* ========================================
   Hero Section（雑誌表紙風フレーム追加）
======================================== */
.section--hero {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(180deg, var(--color-bg) 0%, #FFE8E0 100%);
}

.hero {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 100px 0 60px;
  position: relative;
}

/* 雑誌フレーム装飾 */
.hero__frame {
  background: var(--color-bg-white);
  border: var(--border-frame);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 700px;
  width: 100%;
  box-shadow: 6px 6px 0 var(--color-text);
}

@media (min-width: 768px) {
  .hero__frame {
    padding: 28px;
  }
}

.hero__frame-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-text);
  margin-bottom: 20px;
}

.hero__frame-issue {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-text-light);
}

.hero__frame-badge {
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
}

.hero__inner {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 24px;
}

@media (min-width: 768px) {
  .hero__inner {
    flex-direction: row;
    gap: 32px;
  }
}

.hero__content {
  text-align: center;
  flex: 1;
}

@media (min-width: 768px) {
  .hero__content {
    text-align: left;
  }
}

/* 吹き出し（元のv1デザイン維持） */
.hero__balloon {
  position: relative;
  background: var(--color-bg);
  border: var(--border-frame);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
  display: inline-block;
}

.hero__balloon::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 28px;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--color-bg);
}

.hero__balloon::before {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 25px;
  width: 0;
  height: 0;
  border-left: 13px solid transparent;
  border-right: 13px solid transparent;
  border-top: 13px solid var(--color-text);
}

.hero__title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.5;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--text-xl);
  }
}

.hero__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.hero__visual {
  flex-shrink: 0;
}

.hero__image {
  max-width: 180px;
  border: var(--border-frame);
  border-radius: var(--radius);
}

@media (min-width: 768px) {
  .hero__image {
    max-width: 220px;
  }
}

.hero__frame-footer {
  margin-top: 20px;
  padding-top: 12px;
  border-top: 2px solid var(--color-text);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.hero__frame-topic {
  background: var(--color-accent);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
}

.hero__scroll {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ========================================
   Section Common
======================================== */
.section {
  padding: var(--space-section) 24px;
  display: flex;
  align-items: center;
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header__label {
  display: inline-block;
  background: var(--color-text);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 5px 14px;
  margin-bottom: 12px;
}

.section-header__title {
  font-size: var(--text-2xl);
  font-weight: 700;
}

@media (min-width: 768px) {
  .section-header__title {
    font-size: var(--text-3xl);
  }
}

.section-header__lead {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-top: 8px;
}

/* 背景バリエーション */
.section--works,
.section--faq {
  background: var(--color-bg-white);
}

.section--cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, #FF8A80 100%);
}

/* ========================================
   Features（特徴）- 元のデザイン維持
======================================== */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
}

.feature {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-bg-white);
  border: var(--border-frame);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: 4px 4px 0 var(--color-text);
}

.feature__icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature__title {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
}

.feature__text {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ========================================
   エフェクト3&4: Works（MASONRY + FLIP）
======================================== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  grid-auto-rows: 180px;
}

@media (min-width: 768px) {
  .works-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    grid-auto-rows: 200px;
  }
}

/* カードサイズバリエーション */
.work-card--tall {
  grid-row: span 2;
}

.work-card--wide {
  grid-column: span 2;
}

/* FLIPカード */
.work-card {
  perspective: 1000px;
  cursor: pointer;
}

.work-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.work-card:hover .work-card__inner,
.work-card.is-flipped .work-card__inner {
  transform: rotateY(180deg);
}

.work-card__front,
.work-card__back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border: var(--border-frame);
  border-radius: var(--radius);
  overflow: hidden;
}

.work-card__front {
  background: var(--color-bg);
}

.work-card__front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

.work-card__back {
  background: var(--color-bg);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
}

.work-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.work-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: 12px;
  line-height: 1.6;
}

.work-card__tag {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: var(--text-xs);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.work-card__link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
  transition: opacity var(--transition);
}

.work-card__link:hover {
  opacity: 0.7;
}

.works-cta {
  text-align: center;
  margin-top: 40px;
}

/* ========================================
   Flow（制作の流れ）- 元のデザイン維持
======================================== */
.flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

.flow__item {
  text-align: center;
  padding: 24px 16px;
  background: var(--color-bg-white);
  border: var(--border-frame);
  border-radius: var(--radius-lg);
}

.flow__number {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.flow__title {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 8px;
}

.flow__text {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

/* ========================================
   Profile（プロフィール）- 元のデザイン維持
======================================== */
.profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

@media (min-width: 768px) {
  .profile {
    flex-direction: row;
    text-align: left;
    gap: 36px;
  }
}

.profile__image img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 4px solid var(--color-primary);
}

.profile__name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.profile__role {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.profile__text {
  font-size: var(--text-sm);
  line-height: 1.9;
}

/* ========================================
   FAQ - 元のデザイン維持
======================================== */
.faq {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 700px;
  margin: 0 auto;
}

.faq__item {
  background: var(--color-bg);
  border: var(--border-frame);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq__question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__q,
.faq__a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: 50%;
  flex-shrink: 0;
}

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

.faq__a {
  background: var(--color-accent);
  color: #fff;
}

.faq__answer {
  display: flex;
  gap: 14px;
  padding: 0 20px 18px;
  padding-left: 62px;
}

.faq__answer p {
  color: var(--color-text-light);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ========================================
   CTA
======================================== */
.cta {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.cta__balloon {
  position: relative;
  display: inline-block;
  background: var(--color-bg-white);
  border: var(--border-frame);
  border-radius: var(--radius-lg);
  padding: 24px 36px;
  margin-bottom: 24px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.15);
}

.cta__balloon::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--color-bg-white);
}

.cta__balloon::before {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 13px solid transparent;
  border-right: 13px solid transparent;
  border-top: 13px solid var(--color-text);
}

.cta__text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.5;
}

@media (min-width: 768px) {
  .cta__text {
    font-size: var(--text-xl);
  }
}

.cta__buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (min-width: 480px) {
  .cta__buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ========================================
   Buttons
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: var(--text-base);
  font-weight: 700;
  border-radius: var(--radius);
  border: var(--border-frame);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--color-text);
}

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

.btn--white {
  background: var(--color-bg-white);
  color: var(--color-text);
  border-color: var(--color-text);
}

.btn--line {
  background: var(--color-line);
  color: #fff;
  border-color: var(--color-text);
}

.btn--large {
  padding: 14px 28px;
  font-size: var(--text-base);
}

.btn__icon {
  font-size: 1.1em;
}

/* ========================================
   Footer
======================================== */
.footer {
  background: var(--color-text);
  color: #fff;
  padding: 40px 24px 20px;
  text-align: center;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer__logo {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.footer__menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 20px;
  margin-bottom: 20px;
}

.footer__menu a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

.footer__menu a:hover {
  color: #fff;
}

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Animation（フェードアップ）
======================================== */
.animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

  html {
    scroll-behavior: auto;
  }

  .snap-container {
    scroll-snap-type: none;
  }

  .work-card:hover .work-card__inner {
    transform: none;
  }
}