@charset "utf-8";

/* =====================================================
ローリングシャープナー専用CSS
-----------------------------------------------------
読み込み順：
1. bootstrap.min.css
2. tuika.css
3. rolling_sharpener.css（このファイル）

方針：
・この商品ページ専用の指定は rs- 接頭辞で管理
・共通CSSへ入れるものは最小限にする
・余白は広め、ただし間延びしすぎない
===================================================== */

:root {
  --rs-black: #171717;
  --rs-charcoal: #2f3437;
  --rs-brown: #8a6448;
  --rs-brown-dark: #5d422f;
  --rs-silver: #c9c7c1;
  --rs-cream: #f7f5f0;
  --rs-warm: #efebe4;
  --rs-line: #ded8ce;
  --rs-text: #2f2f2f;
  --rs-muted: #6b6b6b;
  --rs-white: #ffffff;
  --rs-serif: 'Noto Serif JP', serif;
  --rs-sans: 'Noto Sans JP', sans-serif;
}

/* tuika.css の p / h2 / h3 をこのページ内だけ調整 */
.rs-page {
  font-family: var(--rs-sans);
  color: var(--rs-text);
  background-color: var(--rs-cream);
  line-height: 1.8;
}

.rs-page p {
  font-size: 1rem;
  margin-top: 0;
  margin-bottom: 1rem;
  line-height: 1.9;
}

.rs-page h1,
.rs-page h2,
.rs-page h3,
.rs-page h4 {
  margin-top: 0;
  padding-bottom: 0;
}

.rs-page a {
  text-decoration: none;
}

/* ナビの色だけ微調整 */
.rs-nav {
  background-color: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

/* =====================================================
共通セクション
===================================================== */

.rs-section {
  padding: 5rem 0;
}

.rs-bg-warm {
  background: linear-gradient(180deg, var(--rs-cream), var(--rs-warm));
}
.rs-bg-white {
  background-color: var(--rs-white);
}

.rs-bg-soft {
  background:
    linear-gradient(180deg, rgba(247, 245, 240, 0.95), rgba(239, 235, 228, 0.95));
  border-top: 1px solid rgba(222, 216, 206, 0.75);
  border-bottom: 1px solid rgba(222, 216, 206, 0.45);
}


.rs-bg-deep {
  background:
    radial-gradient(circle at top left, rgba(138, 100, 72, 0.16), transparent 35%),
    linear-gradient(135deg, #252525, #3b342d);
  color: var(--rs-white);
}

.rs-section-label {
  font-family: var(--rs-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--rs-brown);
  margin-bottom: 0.8rem;
}

.rs-label-light {
  color: #dbc4af;
}

.rs-section-title {
  font-family: var(--rs-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--rs-charcoal);
  line-height: 1.45;
  margin-bottom: 1.4rem;
}

.rs-title-light {
  color: var(--rs-white);
}

.rs-text {
  color: var(--rs-muted);
  line-height: 2;
}

.rs-text-light {
  color: rgba(255, 255, 255, 0.82);
  line-height: 2;
}

.rs-concept-lead {
  font-family: var(--rs-serif);
  font-size: 1.25rem;
  color: var(--rs-charcoal);
  margin-bottom: 1.5rem;
}

.rs-max-760 {
  max-width: 760px;
}

/* =====================================================
メインビジュアル
===================================================== */

.rs-hero {
  min-height: 680px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 76% 48%, rgba(138, 100, 72, 0.20), transparent 32%),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.14), transparent 32%),
    linear-gradient(
      90deg,
      #3a3834 0%,
      #5a554e 40%,
      #f4f1eb 74%,
      #ddd7cf 100%
    );
}

.rs-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 35%, rgba(255, 255, 255, 0.08), transparent 32%),
    linear-gradient(180deg, transparent 70%, rgba(247, 245, 240, 0.96) 100%);
  pointer-events: none;
}

.rs-eyebrow {
  color: #e6d6c5;
  font-weight: 700;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  margin-bottom: 1.2rem;
}

.rs-hero-title {
  font-family: var(--rs-serif);
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  color: var(--rs-white);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.06em;
  margin-bottom: 1.8rem;
}

.rs-hero-lead {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.1rem;
  line-height: 2;
  max-width: 560px;
}

.rs-hero-product-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.rs-hero-product-wrap::before {
  content: "";
  position: absolute;
  width: min(420px, 78vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.24), transparent 70%);
  filter: blur(2px);
}

.rs-hero-product {
  position: relative;
  max-width: min(760px, 92vw);
  filter: drop-shadow(0 28px 36px rgba(0, 0, 0, 0.26));
  transform: translateY(12px);
}


/* =====================================================
ボタン
===================================================== */

.rs-btn-primary {
  background-color: var(--rs-brown);
  border: 1px solid var(--rs-brown);
  color: var(--rs-white);
  padding: 0.85rem 2.2rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: all 0.3s ease;
}

.rs-btn-primary:hover {
  background-color: var(--rs-brown-dark);
  border-color: var(--rs-brown-dark);
  color: var(--rs-white);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(93, 66, 47, 0.24);
}

.rs-btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.72);
  color: var(--rs-white);
  padding: 0.85rem 2.2rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: all 0.3s ease;
}

.rs-btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.92);
  color: var(--rs-charcoal);
  transform: translateY(-2px);
}

/* =====================================================
特徴カード
===================================================== */

.rs-feature-card {
  height: 100%;
  background-color: var(--rs-white);
  border: 1px solid var(--rs-line);
  border-radius: 1.2rem;
  padding: 2.2rem;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.rs-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.08);
}

.rs-feature-number {
  font-family: var(--rs-serif);
  color: var(--rs-brown);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.4rem;
}

.rs-feature-card h3 {
  font-family: var(--rs-serif);
  color: var(--rs-charcoal);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.55;
  margin-bottom: 1rem;
}

.rs-feature-card p {
  color: var(--rs-muted);
  font-size: 0.96rem;
}

/* =====================================================
使い方
===================================================== */

.rs-manual-img {
  margin-top: 1.6rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.rs-step-list {
  display: grid;
  gap: 1rem;
}

.rs-step-item {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1rem;
  padding: 1.5rem 1.6rem;
}

.rs-step-item span {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: #dbc4af;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.rs-step-item h3 {
  color: var(--rs-white);
  font-family: var(--rs-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.55rem;
}

.rs-step-item p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* 使い方動画 */
.rs-howto-video {
  border-radius: 1.2rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.22);
  background-color: #111;
}

.rs-caption {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.82rem;
}

/* =====================================================
製品情報
===================================================== */

.rs-spec-table {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
}

.rs-spec-table th {
  width: 34%;
  background-color: #f3eee7;
  color: var(--rs-charcoal);
  font-weight: 700;
  padding: 1rem 1.2rem;
  white-space: nowrap;
}

.rs-spec-table td {
  background-color: var(--rs-white);
  padding: 1rem 1.2rem;
  color: var(--rs-text);
}

.rs-note {
  font-size: 0.86rem;
  color: var(--rs-muted);
}

/* =====================================================
ラインナップ
===================================================== */

.rs-lineup-card {
  height: 100%;
  background-color: var(--rs-white);
  border: 1px solid var(--rs-line);
  border-radius: 1.1rem;
  padding: 2rem;
  text-align: center;
}

.rs-lineup-card h3 {
  font-family: var(--rs-serif);
  font-size: 1.25rem;
  color: var(--rs-charcoal);
  font-weight: 700;
  margin-bottom: 1rem;
}

.rs-lineup-card p {
  color: var(--rs-muted);
  margin-bottom: 0;
}

/* =====================================================
注意事項
===================================================== */

.rs-alert-card {
  background-color: #fffaf3;
  border: 1px solid #ead7bf;
  border-left: 6px solid var(--rs-brown);
  border-radius: 1rem;
  padding: 2rem;
}

.rs-alert-card h3 {
  font-family: var(--rs-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--rs-brown-dark);
  margin-bottom: 1.2rem;
}

.rs-alert-card ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.rs-alert-card li {
  margin-bottom: 0.6rem;
  color: var(--rs-text);
}

.rs-alert-card li:last-child {
  margin-bottom: 0;
}

/* FAQセクションは前後と背景差を出して、余白が空きすぎに見えないようにする */
.rs-faq-section {
  padding-top: 4.2rem;
}

/* =====================================================
FAQ
===================================================== */

.rs-faq {
  max-width: 960px;
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.08);
  border-radius: 1rem;
  overflow: hidden;
}

.rs-faq .accordion-item {
  border: none;
  border-bottom: 1px solid var(--rs-line);
}

.rs-faq .accordion-button {
  font-weight: 700;
  color: var(--rs-charcoal);
  background-color: var(--rs-white);
  padding: 1.25rem 1.5rem;
}

.rs-faq .accordion-button:not(.collapsed) {
  color: var(--rs-white);
  background-color: var(--rs-brown);
  box-shadow: none;
}

.rs-faq .accordion-body {
  background-color: #fffaf3;
  color: var(--rs-text);
  line-height: 1.9;
}

/* =====================================================
お問い合わせ
===================================================== */

.rs-contact {
  background-color: var(--rs-white);
}

/* =====================================================
レスポンシブ
===================================================== */

@media (max-width: 991.98px) {
  .rs-hero {
    min-height: 720px;
    background:
      linear-gradient(
        180deg,
        #3a3834 0%,
        #6b665e 48%,
        #f4f1eb 82%,
        #ddd7cf 100%
      );
    text-align: center;
  }
  .rs-hero-product {
    max-width: min(420px, 86vw);
    margin-top: 1.5rem;
    transform: none;
  }

  .rs-section {
    padding: 3.7rem 0;
  }

  .rs-feature-card,
  .rs-lineup-card,
  .rs-alert-card {
    padding: 1.5rem;
  }

  .rs-spec-table th,
  .rs-spec-table td {
    display: block;
    width: 100%;
  }

  .rs-spec-table th {
    border-bottom: none;
  }
}

@media (max-width: 575.98px) {
  .rs-hero {
    min-height: 560px;
  }

  .rs-hero-title {
    font-size: 2.35rem;
  }

  .rs-hero-lead {
    font-size: 0.98rem;
  }

  .rs-section-title {
    font-size: 1.85rem;
  }

  .rs-btn-primary,
  .rs-btn-outline {
    width: 100%;
    text-align: center;
  }
}