/* =============================================
   common.css — 株式会社クリークフォレスト
   全ページ共通スタイル
   ============================================= */

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

/* ----- Design Tokens ----- */
:root {
  --gray-50:  #F7F7F6;
  --gray-100: #EEEEEC;
  --gray-200: #D8D8D4;
  --gray-400: #A0A09A;
  --gray-500: #0e0d0c44;
  --gray-600: #6B6B65;
  --gray-800: #3A3A37;
  --gray-900: #1E1E1C;
  --white:    #FFFFFF;

  --font-serif: 'Noto Serif JP', serif;
  --font-sans:  'Noto Sans JP', sans-serif;
}

/* ----- Base ----- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--gray-50);
  color: var(--gray-800);
  font-weight: 300;
  line-height: 1.8;
}

/* ----- Navigation ----- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  padding: 0 2.5rem;
  background: rgba(247, 247, 246, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--gray-900);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--gray-600);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gray-900);
}

/* ----- ハンバーガーボタン ----- */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 110;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--gray-800);
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ----- スマホ用ドロワーメニュー ----- */
@media (max-width: 768px) {
  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-900); /* ← ダーク背景に変更 */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 100;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    letter-spacing: 0.14em;
    color: var(--gray-100); /* ← 文字を明るく */
  }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--white);
  }
}

/* ----- Page Header (dark band) ----- */
.page-header {
  margin-top: 64px;
  padding: 6rem 5rem 5rem;
  background-color: var(--gray-600);
  color: var(--gray-100);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: end;
}

.page-header-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  color: var(--white);
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--white);
}

.page-header p {
  font-size: 0.85rem;
  line-height: 2;
  align-self: end;
  padding-bottom: 0.4rem;
  color: var(--white);
}

/* ----- Section Labels & Titles ----- */
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.8rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--gray-900);
  letter-spacing: 0.06em;
  margin-bottom: 3.5rem;
}

/* ----- Photo Placeholder ----- */
.photo-placeholder-icon {
  opacity: 0.4;
}

.photo-frame {
  background-color: var(--gray-200);
  border: 1px dashed var(--gray-400);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--gray-400);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

/* ----- CTA Band ----- */
.cta-band {
  background-color: var(--gray-600);
  color: var(--white);
  text-align: center;
  padding: 5rem 2rem;
}

.cta-band p {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  margin-bottom: 2rem;
}

.btn-outline {
  display: inline-block;
  padding: 0.9rem 3rem;
  border: 1px solid var(--gray-400);
  color: var(--white);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  transition: background 0.25s, color 0.25s;
}

.btn-outline:hover {
  background-color: var(--white);
  color: var(--gray-900);
}

/* ----- Footer ----- */
.footer {
  background-color: var(--gray-600);
  border-top: 1px solid #dfdddd;
  padding: 2rem 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--white);
  letter-spacing: 0.1em;
}

.footer-copy {
  font-size: 0.68rem;
  color: var(--white);
  letter-spacing: 0.08em;
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
  .nav {
    padding: 0 1.5rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .page-header {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem 3rem;
    gap: 1.5rem;
  }

  .footer {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
    padding: 2rem 1.5rem;
  }
}

/* ----- ページトップへ戻るボタン ----- */
.to-top {
  position: fixed;
  bottom: 2.5rem;
  right: 2.5rem;
  z-index: 200;

  width: 48px;
  height: 48px;

  display: flex;
  align-items: center;
  justify-content: center;

  background-color: var(--gray-900);
  color: var(--white);
  border: 1px solid var(--gray-600);
  border-radius: 0;
  cursor: pointer;

  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background-color 0.2s;
}

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

.to-top:hover {
  background-color: var(--gray-800);
}


/* ----- ページフェードイン ----- */
.fade-page {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

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

/* ----- 登録証 画像リンクボタン ----- */
.cert-link {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  text-decoration: none;
  transition: border-color 0.2s, background-color 0.2s;
}

.cert-link:hover {
  border-color: var(--gray-400);
  background-color: var(--gray-50);
}

.cert-link-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--gray-100);
  color: var(--gray-600);
}

.cert-link-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cert-link-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--gray-900);
  letter-spacing: 0.06em;
}

.cert-link-sub {
  font-size: 0.78rem;
  color: var(--gray-400);
  letter-spacing: 0.04em;
}

.cert-link-arrow {
  font-size: 0.9rem;
  color: var(--gray-400);
  transition: transform 0.25s;
}

.cert-link:hover .cert-link-arrow {
  transform: translateX(6px);
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
  .cert-link {
    padding: 1.2rem 1.5rem;
    gap: 1rem;
  }

  .cert-link-icon {
    width: 40px;
    height: 40px;
  }
}

/* ----- 送信完了ページ ----- */
.thanks-wrap {
  margin-top: 64px;
  min-height: calc(100vh - 64px - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 5rem 2rem;
  background-color: var(--white);
}

.thanks-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.thanks-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 300;
  color: var(--gray-900);
  letter-spacing: 0.06em;
  margin-bottom: 1.8rem;
}

.thanks-text {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 2.4;
  margin-bottom: 2.5rem;
}

.thanks-note {
  display: block;
  margin-top: 0.8rem;
  font-size: 0.78rem;
  color: var(--gray-400);
}