/* ============================================
   D2PA Site - 共通スタイル
   設計：白基調＋黒アクセント、ヒーローのみダーク反転
   ピクセル絵モチーフ3箇所：ナビ下線・階段状ボタン・ドット罫線
   ============================================ */

:root {
  --color-bg: #FFFFFF;
  --color-bg-dark: #1A1A1A;
  --color-bg-footer: #F7F7F5;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6E;
  --color-text-secondary: #8B8B8E;
  --color-text-light: #BFBFC2;
  --color-text-tertiary-dark: #9A9A9D;
  --color-text-on-dark: #FFFFFF;
  --color-border: #E7E5E0;
  --color-accent: #1A1A1A;
  --font-sans: 'Noto Sans JP', system-ui, sans-serif;
  --max-content: 960px;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-sans); font-weight: 400; color: var(--color-text); background: var(--color-bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button { font-family: inherit; }

/* ナビゲーション */
.nav { padding: 8px 36px; border-bottom: 0.5px solid var(--color-border); }
.nav-inner { max-width: var(--max-content); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { text-decoration: none; display: flex; align-items: center; }
.nav-logo img { display: block; height: 96px; width: auto; margin-left: -28px; }
.nav-menu { display: flex; gap: 36px; font-size: 13px; }
.nav-item { color: var(--color-text-secondary); text-decoration: none; padding-bottom: 10px; position: relative; }
.nav-item.active { color: var(--color-text); }
.nav-item.active .pixel-underline { position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); display: flex; gap: 2px; }
.pixel-underline span { width: 5px; height: 5px; background: var(--color-accent); }

/* ヒーロー */
.hero { background: var(--color-bg-dark); padding: 44px 36px 50px; color: var(--color-text-on-dark); }
.hero-inner { max-width: var(--max-content); margin: 0 auto; }
.hero-pretitle { font-size: 11px; color: var(--color-text-tertiary-dark); margin-bottom: 14px; letter-spacing: 1.5px; font-weight: 500; }
.hero-title { font-size: 28px; font-weight: 500; line-height: 1.35; letter-spacing: -0.5px; margin: 0 0 16px; }
.hero-description { font-size: 14px; color: var(--color-text-light); line-height: 1.8; margin: 0; }

/* セクション共通 */
.section { padding: 52px 36px; max-width: var(--max-content); margin: 0 auto; }
.section-label { font-size: 11px; color: var(--color-text-secondary); margin-bottom: 20px; letter-spacing: 1.5px; font-weight: 500; }
.section-heading { font-size: 16px; color: var(--color-text); font-weight: 500; letter-spacing: -0.1px; margin-bottom: 16px; }
.section-body { font-size: 15px; line-height: 1.9; margin: 0 0 32px; }
.section-body p + p { margin-top: 8px; }

/* 活動ログ：他項目より控えめなレイヤー */
.section-log { padding: 44px 36px 36px; }
.section-log .section-label { margin-bottom: 24px; }
.log-list { }
.log-entry { display: grid; grid-template-columns: 60px 92px 1fr; gap: 16px; padding: 14px 0; align-items: baseline; }
.log-entry + .log-entry { border-top: 0.5px dashed var(--color-border); }
.log-tag { font-size: 10px; color: var(--color-text); border: 0.5px solid var(--color-text); padding: 2px 6px; text-align: center; letter-spacing: 0.5px; justify-self: start; }
.log-date { font-size: 12px; color: var(--color-text-secondary); }
.log-title { font-size: 14px; line-height: 1.5; color: var(--color-text); text-decoration: none; }
.log-title:hover { text-decoration: underline; }
.log-footer { margin-top: 20px; padding-top: 16px; border-top: 0.5px solid var(--color-border); }
.log-more { display: flex; justify-content: center; font-size: 12px; }
.log-more a { color: var(--color-text); text-decoration: none; letter-spacing: 0.5px; }
.log-more a:hover { text-decoration: underline; }
.log-out { margin-top: 14px; display: flex; justify-content: center; gap: 24px; font-size: 12px; }
.log-out a { color: var(--color-text); text-decoration: none; letter-spacing: 0.5px; }
.log-out a:hover { text-decoration: underline; }

/* プロジェクト（取組事例） */
.project-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-bottom: 32px; }
.project-card { }
.project-date { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 6px; }
.project-card-partner { font-size: 12px; color: var(--color-text-secondary); letter-spacing: 0.5px; margin: 0 0 8px; line-height: 1.5; }
.project-title { font-size: 16px; font-weight: 500; line-height: 1.5; margin: 0 0 6px; }
.project-partner { font-size: 12px; color: var(--color-text-secondary); margin: 0 0 8px; line-height: 1.5; }
.project-description { font-size: 13px; color: var(--color-text-muted); line-height: 1.7; margin: 0; }

/* 活動目標リスト（about.html） */
.goal-list { margin: 0 0 32px; padding: 0; list-style: none; }
.goal-list li { font-size: 15px; line-height: 1.9; padding: 12px 0 12px 20px; border-bottom: 0.5px dashed var(--color-border); position: relative; }
.goal-list li:first-child { border-top: 0.5px dashed var(--color-border); }
.goal-list li::before { content: "・"; position: absolute; left: 0; color: var(--color-text-secondary); }

/* 階段状コーナーのボタン（ABOUT / PROJECT / MEMBER / CONTACT） */
.btn-wrap { display: flex; justify-content: center; }
.btn-pixel { position: relative; padding: 4px; display: inline-block; }
.btn-pixel a { background: var(--color-accent); color: #FFFFFF; padding: 13px 32px; font-size: 13px; border-radius: 0; position: relative; z-index: 2; letter-spacing: 1.5px; text-decoration: none; display: inline-block; min-width: 200px; text-align: center; }
.btn-pixel a:hover { opacity: 0.85; }
.btn-corner { position: absolute; width: 4px; height: 4px; background: var(--color-accent); }
.btn-corner.tr1 { top: 0; right: 0; }
.btn-corner.tr2 { top: 4px; right: 0; }
.btn-corner.bl1 { bottom: 0; left: 0; }
.btn-corner.bl2 { bottom: 4px; left: 0; }

/* ドット罫線（セクション間の区切り） */
.dot-divider { height: 4px; background-image: radial-gradient(circle, var(--color-accent) 1.5px, transparent 2px); background-size: 12px 4px; background-position: 0 50%; background-repeat: repeat-x; margin: 0 36px; max-width: calc(var(--max-content) - 72px); margin-left: auto; margin-right: auto; }

/* フッター */
.footer { background: var(--color-bg-footer); padding: 28px 36px; color: var(--color-text-secondary); font-size: 12px; border-top: 0.5px solid var(--color-border); }
.footer-inner { max-width: var(--max-content); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.footer-name { color: var(--color-text); margin-bottom: 4px; font-weight: 500; }
.footer-sns { display: flex; gap: 8px; }
.footer-sns a { width: 32px; height: 32px; border: 0.5px solid var(--color-accent); display: flex; align-items: center; justify-content: center; font-size: 11px; color: var(--color-text); text-decoration: none; font-weight: 500; }
.footer-sns a.facebook { font-size: 16px; }
.footer-sns a:hover { background: var(--color-accent); color: #FFFFFF; }

/* 一覧ページ（/log.html）のヘッダー */
.page-header { padding: 44px 36px 32px; max-width: var(--max-content); margin: 0 auto; }
.page-title { font-size: 22px; font-weight: 500; letter-spacing: -0.3px; margin: 0 0 8px; }
.page-subtitle { font-size: 13px; color: var(--color-text-muted); margin: 0; }

/* 法人情報テーブル（about.html） */
.info-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.info-table th,
.info-table td { padding: 14px 0; border-bottom: 0.5px solid var(--color-border); text-align: left; vertical-align: top; }
.info-table th { width: 160px; color: var(--color-text-secondary); font-weight: 400; font-size: 13px; padding-right: 24px; }
.info-table td { line-height: 1.7; }

/* プロジェクトリスト（project.html） */
.project-list { }
.project-item { padding: 32px 0; border-bottom: 0.5px solid var(--color-border); }
.project-item:first-child { border-top: 0.5px solid var(--color-border); }
.project-item-header { display: flex; align-items: baseline; gap: 16px; margin-bottom: 12px; }
.project-item-title { font-size: 18px; font-weight: 500; margin: 0; }
.project-item-date { font-size: 12px; color: var(--color-text-secondary); flex-shrink: 0; }
.project-item-desc { font-size: 14px; color: var(--color-text-muted); line-height: 1.8; margin: 0 0 16px; }
.project-item-partner { font-size: 12px; color: var(--color-text-secondary); letter-spacing: 0.5px; margin-bottom: 12px; }
.project-item-link { font-size: 12px; color: var(--color-text); text-decoration: none; letter-spacing: 0.5px; }
.project-item-link:hover { text-decoration: underline; }
.project-item-notes { margin-top: 4px; }
.project-item-notes-label { font-size: 11px; color: var(--color-text-secondary); letter-spacing: 1px; margin-bottom: 10px; }
.project-item-notes ul { list-style: none; margin: 0; padding: 0; }
.project-item-notes li { margin-bottom: 8px; }
.project-item-notes a { font-size: 13px; color: var(--color-text); text-decoration: none; letter-spacing: 0.3px; }
.project-item-notes a:hover { text-decoration: underline; }

/* メンバーグリッド（member.html） */
.member-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 0; }
.member-card { border: 0.5px solid var(--color-border); padding: 24px; }
.member-avatar { width: 100px; height: 100px; background: var(--color-border); margin: 0 auto 16px; object-fit: cover; display: block; }
.member-name { font-size: 15px; font-weight: 500; margin: 0 0 4px; }
.member-role { font-size: 10px; color: var(--color-text-secondary); letter-spacing: 1px; margin: 0 0 12px; }
.member-bio { font-size: 13px; color: var(--color-text-muted); line-height: 1.7; margin: 0; }

/* メンターグリッド（member.html） */
.mentor-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.mentor-card { border: 0.5px solid var(--color-border); padding: 24px; }
.mentor-title { font-size: 10px; color: var(--color-text-secondary); letter-spacing: 1px; margin: 0 0 6px; }
.mentor-name { font-size: 17px; font-weight: 500; margin: 0 0 4px; }
.mentor-affil { font-size: 13px; color: var(--color-text-muted); margin: 0 0 14px; line-height: 1.5; }
.mentor-bio { font-size: 13px; color: var(--color-text-muted); line-height: 1.7; margin: 0; }

/* お問い合わせフォーム（contact.html） */
.contact-form { max-width: 560px; }
.contact-note { font-size: 12px; color: var(--color-text-muted); margin: 0 0 32px; line-height: 1.7; }
.form-group { margin-bottom: 24px; }
.form-label { display: block; font-size: 11px; color: var(--color-text-secondary); letter-spacing: 1px; margin-bottom: 8px; }
.form-input,
.form-textarea,
.form-select { width: 100%; border: 0.5px solid var(--color-border); padding: 12px 14px; font-family: var(--font-sans); font-size: 14px; background: var(--color-bg); color: var(--color-text); border-radius: 0; outline: none; -webkit-appearance: none; }
.form-input:focus,
.form-textarea:focus,
.form-select:focus { border-color: var(--color-accent); }
.form-textarea { resize: vertical; min-height: 140px; line-height: 1.7; }
.form-submit { background: var(--color-accent); color: #FFFFFF; padding: 14px 40px; font-size: 13px; letter-spacing: 1.5px; border: none; cursor: pointer; font-family: var(--font-sans); border-radius: 0; }
.form-submit:hover { opacity: 0.85; }

/* レスポンシブ */
@media (max-width: 640px) {
  .nav { padding: 8px 20px; }
  .nav-inner { flex-wrap: wrap; gap: 12px; }
  .nav-menu { gap: 24px; font-size: 12px; }
  .hero { padding: 36px 20px 42px; }
  .hero-title { font-size: 24px; }
  .section { padding: 40px 20px; }
  .section-log { padding: 36px 20px 28px; }
  .log-entry { grid-template-columns: 52px 80px 1fr; gap: 12px; }
  .project-grid { grid-template-columns: 1fr; gap: 24px; }
  .dot-divider { margin-left: 20px; margin-right: 20px; }
  .footer { padding: 24px 20px; }
  .footer-inner { flex-direction: column; gap: 16px; align-items: flex-start; }
  .page-header { padding: 32px 20px 24px; }
  .member-grid { grid-template-columns: 1fr; }
  .mentor-grid { grid-template-columns: 1fr; }
  .info-table th { width: 100px; font-size: 12px; padding-right: 16px; }
  .contact-form { max-width: 100%; }
}