/* ==========================================================================
   デザインシステムと基本設定（CSSカスタム変数）
   ========================================================================== */
:root {
  /* 指定されたカラーパレット */
  --color-white: #FFFFFF;
  --color-light-gray: #F5F5F5;
  --color-dark-gray: #333333;
  --color-black: #111111;
  
  /* 補助的な色（半透明の枠線やテキスト） */
  --color-border: rgba(17, 17, 17, 0.08);
  --color-text-muted: #666666;
  --color-overlay: rgba(17, 17, 17, 0.4);
  
  /* フォント指定 */
  --font-primary: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* イージング（滑らかなアニメーション用の数値設定） */
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.4s var(--ease-apple);
  --transition-slow: 0.8s var(--ease-apple);
}

/* 基本的なリセットスタイル */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* スムーズスクロールの設定（JSが動かない場合の保険） */
  font-size: 16px;
  color: var(--color-black);
  background-color: var(--color-white);
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased; /* 文字の表示を滑らかにする設定 */
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

a:hover {
  opacity: 0.8;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

/* ==========================================================================
   共通コンポーネント（余白、ボタン、見出しなど）
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 80px 0;
}

@media (min-width: 768px) {
  .section-padding {
    padding: 120px 0;
  }
}

.bg-light {
  background-color: var(--color-light-gray);
}

/* 大きな英字見出しのデザイン */
.section-header {
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: 60px;
  }
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-black);
  line-height: 1.1;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 3.5rem;
  }
}

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

/* Apple風のボタンデザイン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-black);
  color: var(--color-white);
  border: 1px solid var(--color-black);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-black);
  opacity: 1;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
  opacity: 1;
}

/* ==========================================================================
   Header（半透明グローバルメニュー）
   ========================================================================== */
.global-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  background-color: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px); /* Apple風の背面ぼかし効果 */
  -webkit-backdrop-filter: blur(20px);
  transition: background-color var(--transition-normal);
}

.header-container {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-black);
}

.nav-list {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-dark-gray);
  position: relative;
  padding: 6px 0;
}

/* リンクホバー時の極細アンダーライン表現 */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-black);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-black);
  opacity: 1;
}

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* モバイル用のハンバーガーメニュー開閉ボタン */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 14px;
  cursor: pointer;
}

.menu-toggle .bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-black);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* モバイル用メニューのメディアクエリ */
@media (max-width: 767px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    height: calc(100vh - 60px);
    background-color: var(--color-white);
    padding: 40px 24px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    z-index: 999;
  }

  /* メニューが開いている状態 */
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    gap: 24px;
    align-items: center;
  }

  .nav-link {
    font-size: 1.5rem;
    font-weight: 400;
  }

  /* ハンバーガーメニューのアニメーション（×印への変化） */
  .menu-toggle.active .bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .menu-toggle.active .bar:nth-child(2) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ==========================================================================
   Hero セクション
   ========================================================================== */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  text-align: center;
  padding: 0 24px;
}

.hero-bg-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.hero-bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.05); /* 初期状態でほんの少し拡大しておき、高級感を演出 */
  filter: grayscale(15%); /* 少し彩度を落としてモノトーンに近づける */
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-overlay);
}

.hero-content {
  max-width: 800px;
  z-index: 1;
  margin-top: 40px;
}

.hero-subtitle {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  display: inline-block;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  line-height: 1.1;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4.5rem;
    letter-spacing: 0.1em;
  }
}

.hero-lead {
  font-size: 1.1rem;
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto 40px auto;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .hero-lead {
    font-size: 1.35rem;
  }
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* スクリプトスクロールガイド */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.scroll-text {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.6;
  font-weight: 500;
}

.scroll-line {
  width: 1px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

/* スクロール指示線のラインアニメーション */
.scroll-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: var(--color-white);
  animation: scroll-line-anim 2s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}

@keyframes scroll-line-anim {
  0% {
    transform: translateY(-100%);
  }
  80% {
    transform: translateY(200%);
  }
  100% {
    transform: translateY(200%);
  }
}

/* ==========================================================================
   About セクション
   ========================================================================== */
.about-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

@media (min-width: 768px) {
  .about-section {
    padding-top: 90px;
    padding-bottom: 90px;
  }
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center; /* 左右の要素の高さを中央で揃えて余白感を整える */
}

@media (min-width: 992px) {
  .about-grid {
    grid-template-columns: 4fr 6fr; /* PC表示：左40%、右60% */
    gap: 48px; /* グリッド間の余白を80pxから48pxに縮小 */
  }
}

/* プロフィール画像 */
.about-left {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.profile-image-container {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background-color: var(--color-light-gray);
  padding: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  margin-bottom: 24px; /* 画像とカードの間隔を縮小 */
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  transition: transform var(--transition-normal);
}

.profile-image-container:hover .profile-image {
  transform: scale(1.05); /* ホバー時に少し拡大 */
}

/* プロフィールカード */
.profile-card {
  width: 100%;
  background-color: var(--color-light-gray);
  border-radius: 20px;
  padding: 32px 28px; /* カード内の余白を40pxから少しコンパクトに調整 */
  text-align: left;
  border: 1px solid rgba(17, 17, 17, 0.02);
}

.profile-card .card-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  display: inline-block;
  margin-bottom: 6px;
}

.profile-card .card-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px; /* 余白を20pxから16pxに縮小 */
  color: var(--color-black);
}

.profile-card .card-body p {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 12px; /* 段落間の余白を16pxから12pxに縮小 */
  color: var(--color-dark-gray);
}

.profile-card .card-body p:last-child {
  margin-bottom: 0;
}

.profile-card .card-footer {
  margin-top: 20px; /* 余白を24pxから20pxに縮小 */
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.profile-card .footer-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}

.profile-card .footer-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-black);
}

/* 自己紹介本文（右側） */
.about-content {
  padding-top: 0;
}

.about-lead {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px; /* 見出し下の余白を24pxから16pxに縮小 */
  color: var(--color-black);
}

.about-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 16px; /* 本文段落間の余白を20pxから16pxに縮小 */
  color: var(--color-dark-gray);
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Skills セクション
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 576px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.skill-card {
  background-color: var(--color-white);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: transform 0.4s var(--ease-apple), box-shadow 0.4s var(--ease-apple);
}

.skill-card:hover {
  transform: translateY(-5px); /* ホバー時に少し上に持ち上げる */
  box-shadow: 0 12px 30px rgba(17, 17, 17, 0.04);
}

.skill-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: var(--color-light-gray);
  color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.skill-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-black);
}

.skill-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-dark-gray);
}

/* ==========================================================================
   Works セクション
   ========================================================================== */
.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 768px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr); /* 実績カードを2列表示 */
    gap: 48px;
  }
}

.work-card {
  background-color: var(--color-white);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

/* 実績画像のコンテナ */
.work-image-wrapper {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-light-gray);
}

.work-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 画像ホバー時のオーバレイ表現 */
.work-hover-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(17, 17, 17, 0.7); /* 暗度を0.4から0.7に上げて文字を浮き立たせる */
  backdrop-filter: blur(8px); /* Apple風のぼかし効果を加えて背景画像とボタンの干渉を防ぐ */
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 2;
}

.work-link-btn {
  background-color: var(--color-white);
  color: var(--color-black);
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: 700; /* フォントをより太くして視認性を向上 */
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15); /* ボタンに影を付けてくっきりと浮かび上がらせる */
  transform: translateY(15px);
  transition: transform var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.work-link-btn:hover {
  background-color: var(--color-light-gray);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  opacity: 1;
}

/* ホバー時の効果 */
.work-card:hover .work-image {
  transform: scale(1.04);
}

.work-card:hover .work-hover-overlay {
  opacity: 1;
}

.work-card:hover .work-link-btn {
  transform: translateY(0);
}

/* 実績カード内の情報テキスト */
.work-info {
  padding: 30px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.work-tech {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.work-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-black);
}

.work-description {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-dark-gray);
  margin-bottom: 24px;
  flex-grow: 1;
}

.work-footer {
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.work-text-link {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-black);
}

.work-text-link svg {
  transition: transform var(--transition-normal);
}

.work-text-link:hover {
  opacity: 1;
}

.work-text-link:hover svg {
  transform: translate(3px, -3px);
}

/* ==========================================================================
   Appeal セクション
   ========================================================================== */
.appeal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .appeal-grid {
    grid-template-columns: repeat(3, 1fr); /* アピールを3列表示 */
    gap: 32px;
  }
}

.appeal-card {
  background-color: var(--color-white);
  border-radius: 16px;
  padding: 40px;
  border: 1px solid var(--color-border);
  position: relative;
}

.appeal-count {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(17, 17, 17, 0.04);
  position: absolute;
  top: 20px;
  right: 30px;
  line-height: 1;
}

.appeal-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-black);
}

.appeal-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-dark-gray);
}

/* ==========================================================================
   Contact セクション
   ========================================================================== */
.contact-form-container {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--color-white);
  border-radius: 20px;
  padding: 32px;
  border: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .contact-form-container {
    padding: 48px;
  }
}

.contact-form .form-group {
  margin-bottom: 24px;
}

.contact-form .form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.contact-form .form-control {
  width: 100%;
  background-color: var(--color-light-gray);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.contact-form .form-control:focus {
  outline: none;
  background-color: var(--color-white);
  border-color: var(--color-black);
  box-shadow: 0 0 0 4px rgba(17, 17, 17, 0.04);
}

/* 送信ボタンのレイアウト調整 */
.btn-block {
  width: 100%;
}

.btn-icon {
  margin-left: 8px;
  transition: transform var(--transition-normal);
}

.btn-block:hover .btn-icon {
  transform: translate(2px, -2px);
}

/* 送信ステータス表示 */
.form-message {
  margin-bottom: 20px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
  font-weight: 500;
}

.form-message.success {
  display: block;
  background-color: rgba(0, 128, 0, 0.05);
  color: green;
  border: 1px solid rgba(0, 128, 0, 0.15);
}

.form-message.error {
  display: block;
  background-color: rgba(255, 0, 0, 0.05);
  color: red;
  border: 1px solid rgba(255, 0, 0, 0.15);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.global-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
  background-color: var(--color-white);
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

@media (min-width: 768px) {
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-social .social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-dark-gray);
  padding: 8px 16px;
  border-radius: 20px;
  background-color: var(--color-light-gray);
  transition: all var(--transition-normal);
}

.footer-social .social-link:hover {
  background-color: var(--color-black);
  color: var(--color-white);
  opacity: 1;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   スクロールアニメーション用の初期設定と挙動
   ========================================================================== */
/* スクロール時にフワッと現れる前の非表示状態 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s var(--ease-apple), transform 1s var(--ease-apple);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 1s var(--ease-apple), transform 1s var(--ease-apple);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 1s var(--ease-apple), transform 1s var(--ease-apple);
}

/* 画面内に入り、JavaScriptで .visible クラスが付与されたときの表示状態 */
.fade-in.visible,
.fade-in-left.visible,
.fade-in-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* ==========================================================================
   スマホ表示時（991px以下）のアニメーション最適化
   ========================================================================== */
@media (max-width: 991px) {
  /* スマホの狭い画面では横揺れ(translateX)によるガタつきや横スクロールを防ぐため、
     すべてのフェードイン方向を「下から上(translateY)」に統一して美しく見せます */
  .fade-in-left,
  .fade-in-right {
    transform: translateY(25px);
  }
}

/* ==========================================================================
   ユーザーのOS設定による配慮（prefers-reduced-motion）
   ========================================================================== */
/* アニメーションや動きに敏感なユーザー向けに、すべての動作を瞬間表示にする設定 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: initial !important;
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
  
  .fade-in,
  .fade-in-left,
  .fade-in-right {
    opacity: 1 !important;
    transform: none !important;
  }

  .scroll-line::after {
    animation: none !important;
  }
}