/* ==========================================================================
   初心者ガイド（page-beginner.php）専用スタイル
   ハイエンド音響ブランド × 建築誌 × PCラボ × 初心者向けガイド。
   装飾よりも「読みやすさ」を最優先する（完全初心者向けページのため）。
   ========================================================================== */

/* このページだけのカラートークン（既存サイトのグローバル変数は変更しない） */
.beginner-page, .beginner-progress {
  --bn-bg: #0a0a0a;
  --bn-bg-soft: #111111;
  --bn-panel: #151515;
  --bn-line: rgba(255, 255, 255, .12);
  --bn-text: #f4f1e8;
  --bn-text-soft: #b7b7b7;
  --bn-text-dim: #737373;
  --bn-accent: #b49b63;
  --bn-warning: #d99032;
  --bn-danger: #c94a4a;
}

.beginner-page {
  background: var(--bn-bg);
  color: var(--bn-text-soft);
}

/* ---- スクロール進捗バー ---- */
.beginner-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--bn-accent);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 300;
}

/* ---- HERO ---- */
.beginner-hero {
  padding: 200px 0 100px;
  border-bottom: 1px solid var(--bn-line);
}
.beginner-hero-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}
.beginner-hero-text { max-width: 640px; }
.beginner-hero .eyebrow {
  color: var(--bn-accent);
  font-family: "Manrope", sans-serif;
}
.beginner-hero .eyebrow::before { background: var(--bn-accent); }
.beginner-hero-title {
  font-family: "Shippori Mincho", "Noto Serif JP", serif;
  font-weight: 700;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.45;
  color: var(--bn-text);
  margin-bottom: 24px;
}
.beginner-hero-lead {
  font-family: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 2;
  color: var(--bn-text-soft);
  margin-bottom: 36px;
}
.beginner-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.beginner-hero .btn-outline {
  background: transparent;
  border-color: var(--bn-line);
  color: var(--bn-text-soft);
}
.beginner-hero .btn-outline:hover { border-color: var(--bn-accent); color: var(--bn-accent); }

.beginner-hero-steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  color: rgba(255, 255, 255, .18);
  letter-spacing: .08em;
  flex-shrink: 0;
  padding-top: 8px;
}

@media (max-width: 860px) {
  .beginner-hero { padding: 140px 0 64px; }
  .beginner-hero-inner { flex-direction: column; }
  .beginner-hero-steps { flex-direction: row; flex-wrap: wrap; gap: 12px; }
}

/* ---- 本文コンテナ ---- */
.beginner-body { padding: 0 0 20px; }

/* ---- STEPブロック共通 ---- */
.beginner-step {
  padding: 72px 0;
  border-bottom: 1px solid var(--bn-line);
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.22, 1, .36, 1);
}
.beginner-step.is-visible { opacity: 1; transform: translateY(0); }
.beginner-step:last-child { border-bottom: none; }

@media (prefers-reduced-motion: reduce) {
  .beginner-step { transition: none; opacity: 1; transform: none; }
}

.beginner-step-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 20px; flex-wrap: wrap; }
.beginner-step-num {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--bn-accent);
  flex-shrink: 0;
}
.beginner-step-title {
  font-family: "Shippori Mincho", "Noto Serif JP", serif;
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px);
  color: var(--bn-text);
}
.beginner-step-text {
  font-family: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  font-size: 14.5px;
  line-height: 2;
  color: var(--bn-text-soft);
  max-width: 680px;
  margin-bottom: 24px;
}
.beginner-step-note {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--bn-accent);
  background: rgba(180, 155, 99, .08);
  border-left: 2px solid var(--bn-accent);
  padding: 14px 18px;
  margin: 0 0 24px;
  max-width: 680px;
}
.beginner-step-cta {
  display: inline-block;
  font-family: "Manrope", sans-serif;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--bn-text);
  border-bottom: 1px solid var(--bn-accent);
  padding-bottom: 2px;
}
.beginner-step-cta:hover { color: var(--bn-accent); }
.beginner-step-cta-group { display: flex; gap: 28px; flex-wrap: wrap; }

/* ---- STEP01：予算ティア ---- */
.beginner-tier-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--bn-line);
  border: 1px solid var(--bn-line);
  margin-bottom: 28px;
}
.beginner-tier {
  background: var(--bn-panel);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.beginner-tier strong {
  font-family: "IBM Plex Mono", monospace;
  font-size: 17px;
  color: var(--bn-text);
}
.beginner-tier span {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 12px;
  color: var(--bn-text-dim);
  line-height: 1.6;
}

/* ---- STEP02：ゲームチップ ---- */
.beginner-chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.beginner-chip-list li {
  font-family: "Manrope", sans-serif;
  font-size: 12.5px;
  color: var(--bn-text-soft);
  border: 1px solid var(--bn-line);
  border-radius: 999px;
  padding: 7px 18px;
}

/* ---- STEP03/05：2カラムパネル ---- */
.beginner-duo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--bn-line);
  border: 1px solid var(--bn-line);
  margin-bottom: 20px;
}
.beginner-duo-card { background: var(--bn-panel); padding: 26px 26px; }
.beginner-duo-card h3 {
  font-family: "Cormorant Garamond", "Shippori Mincho", serif;
  font-weight: 600;
  font-size: 22px;
  color: var(--bn-accent);
  margin: 0 0 10px;
}
.beginner-duo-card p {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--bn-text-soft);
  margin: 0;
}

/* ---- チェックリスト ---- */
.beginner-check-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; max-width: 560px; }
.beginner-check-list li {
  position: relative;
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 13.5px;
  color: var(--bn-text-soft);
  padding-left: 26px;
  line-height: 1.7;
}
.beginner-check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--bn-accent);
  border-radius: 2px;
}

/* ---- STEP06：電源の例 ---- */
.beginner-example-box {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-family: "Manrope", sans-serif;
  font-size: 13px;
  color: var(--bn-text-soft);
  background: var(--bn-panel);
  border: 1px solid var(--bn-line);
  padding: 18px 22px;
  margin-bottom: 24px;
}
.beginner-example-box strong { font-family: "IBM Plex Mono", monospace; color: var(--bn-accent); font-size: 15px; }
.beginner-example-arrow { color: var(--bn-text-dim); }

/* ---- STEP08：構成シミュレーター誘導（強調） ---- */
.beginner-step-featured {
  background: linear-gradient(135deg, rgba(180, 155, 99, .10), rgba(180, 155, 99, .02));
  border: 1px solid rgba(180, 155, 99, .35);
  padding: 56px 48px;
  margin: 20px 0;
}
.beginner-featured-lead {
  font-family: "Shippori Mincho", serif;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--bn-text);
  margin: 0 0 14px;
}

/* ---- STEP09：組み立て手順 ---- */
.beginner-install-list {
  counter-reset: bn-step;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 520px;
}
.beginner-install-list li {
  counter-increment: bn-step;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--bn-line);
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 14px;
  color: var(--bn-text-soft);
}
.beginner-install-list li:last-child { border-bottom: none; }
.beginner-install-list li::before {
  content: counter(bn-step, decimal-leading-zero);
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  color: var(--bn-accent);
  flex-shrink: 0;
  width: 26px;
}

/* ---- STEP10：最終ナビゲーション ---- */
.beginner-final-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--bn-line);
  border: 1px solid var(--bn-line);
}
.beginner-final-card {
  background: var(--bn-panel);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background .2s ease;
}
.beginner-final-card:hover { background: rgba(180, 155, 99, .08); }
.beginner-final-q { font-family: "Zen Kaku Gothic New", sans-serif; font-size: 12.5px; color: var(--bn-text-dim); line-height: 1.6; }
.beginner-final-label { font-family: "Manrope", sans-serif; font-size: 14px; font-weight: 700; color: var(--bn-text); }
.beginner-final-card:hover .beginner-final-label { color: var(--bn-accent); }

/* ---- ブランドコピー ---- */
.beginner-statement {
  background: var(--bn-bg-soft);
  padding: 140px 0;
  border-top: 1px solid var(--bn-line);
  border-bottom: 1px solid var(--bn-line);
  text-align: center;
}
.beginner-statement-inner { max-width: 640px; margin: 0 auto; }
.beginner-statement-lead {
  font-family: "Shippori Mincho", "Noto Serif JP", serif;
  font-weight: 700;
  font-size: clamp(28px, 4.2vw, 46px);
  line-height: 1.5;
  color: var(--bn-text);
  margin: 0 0 24px;
}
.beginner-statement-sub {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 14px;
  line-height: 2;
  color: var(--bn-text-dim);
  margin: 0;
}

/* ---- FAQ ---- */
.beginner-faq { padding: 72px 0; border-bottom: 1px solid var(--bn-line); }
.beginner-faq-title {
  font-family: "Shippori Mincho", serif;
  font-size: 20px;
  color: var(--bn-text);
  margin: 0 0 28px;
}
.beginner-faq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--bn-line); border: 1px solid var(--bn-line); }
.beginner-faq-card { background: var(--bn-panel); padding: 24px 22px; }
.beginner-faq-q { font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 700; font-size: 13.5px; color: var(--bn-text); margin: 0 0 12px; line-height: 1.6; }
.beginner-faq-a { font-family: "Zen Kaku Gothic New", sans-serif; font-size: 12.5px; line-height: 1.9; color: var(--bn-text-dim); margin: 0; }

/* ---- レスポンシブ ---- */
@media (max-width: 900px) {
  .beginner-tier-grid { grid-template-columns: repeat(2, 1fr); }
  .beginner-duo-grid { grid-template-columns: 1fr; }
  .beginner-final-grid { grid-template-columns: repeat(2, 1fr); }
  .beginner-faq-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .beginner-tier-grid { grid-template-columns: 1fr; }
  .beginner-final-grid { grid-template-columns: 1fr; }
  .beginner-step { padding: 52px 0; }
  .beginner-step-featured { padding: 36px 24px; }
  .beginner-statement { padding: 88px 0; }
  .beginner-step-cta-group { gap: 16px; flex-direction: column; }
}