:root {
  --background: #090b10;
  --surface: #11151d;
  --surface-light: #ffffff;
  --text: #f7f7f7;
  --text-dark: #171717;
  --subtext: #aeb4bf;
  --accent: #f6c453;
  --line: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans JP",
    sans-serif;
  line-height: 1.7;
}

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

a {
  color: inherit;
}

.header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 6%;
  background: rgba(9, 11, 16, 0.75);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.logo {
  font-weight: 800;
  letter-spacing: 0.12em;
}

.header-button {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #111;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.hero {
  min-height: 50vh;
  display: grid;
  place-items: center;
  padding: 130px 7% 80px;
  background:
    radial-gradient(
      circle at 70% 30%,
      rgba(246, 196, 83, 0.18),
      transparent 35%
    ),
    linear-gradient(135deg, #08090d, #121722);
}

.hero-content {
  width: min(100%, 1100px);
  text-align: center;
}

.english-title,
.section-label {
    text-align: center;
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.24em;
}

.hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(45px, 9vw, 105px);
  line-height: 1.05;
}

.hero-description {
  max-width: 650px;
  margin: 28px 0;
  color: var(--subtext);
  font-size: clamp(16px, 2vw, 20px);
}

.hero-numbers {
    justify-content: center;
    text-align: center;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 38px 0;
}

.hero-numbers div {
  min-width: 150px;
  padding-right: 25px;
  border-right: 1px solid var(--line);
}

.hero-numbers strong,
.hero-numbers span {
  display: block;
}

.hero-numbers strong {
  font-size: 23px;
}

.hero-numbers span {
  color: var(--subtext);
  font-size: 13px;
}

.main-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 13px 28px;
  border-radius: 999px;
  background: var(--accent);
  color: #111;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.hero-buttons .main-button {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    line-height: 1.4;
    min-width: 220px;
    min-height: 80px;
}

.hero-buttons .main-button span {
    font-size: 15px;
    font-weight: 700;
}

.main-button:hover {
  transform: translateY(-3px);
}

.section {
  padding: 100px 7%;
  text-align: center;
  background: #f4f2ed;
  color: var(--text-dark);
}

.dark-section {
  background: var(--background);
  color: var(--text);
}

.section > h2 {
  margin: 0 0 18px;
  font-size: clamp(34px, 5vw, 60px);
}

.section-description {
  margin-bottom: 45px;
  color: #666;
}

.card-grid,
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  width: min(100%, 1150px);
  margin: 45px auto 0;
}

.card,
.review-card,
.price-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}

.card > span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.card h3,
.price-card h3 {
  margin: 12px 0;
  font-size: 24px;
}

.card p,
.review-card p {
  color: var(--subtext);
}

.light-card {
  background: #fff;
  border-color: #ddd;
}

.light-card p {
  color: #666;
}

.price-grid {
  grid-template-columns: repeat(2, minmax(0, 460px));
  justify-content: center;
}

.price-card {
  position: relative;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 40px rgba(246, 196, 83, 0.12);
}

.price-tag {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: #111;
  font-size: 12px;
  font-weight: 800;
}

.price {
  margin: 15px 0;
  color: var(--accent);
  font-size: 38px;
  font-weight: 900;
}

.price-card ul {
  min-height: 120px;
  padding-left: 20px;
  color: var(--subtext);
}

.slider {
  position: relative;
  display: flex;
  align-items: center;
  gap: 15px;
  width: min(100%, 1050px);
  margin: 40px auto 0;
}

.slider-window {
    width: 420px;
    margin: auto;
    overflow: hidden;
    border-radius: 20px;
}

.slider-track {
  display: flex;
  transition: transform 0.6s ease;
}

.slider-track img {
    min-width: 100%;
    height: 800px;
}

.slider-button {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: #111;
  color: #fff;
  font-size: 30px;
  cursor: pointer;
}

.slider-dots {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 20px auto 0;
}

.slider-dot {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #999;
  cursor: pointer;
}

.slider-dot.active {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #f6c453;
}

#slider-caption {
  display: block;
  width: 100%;
  margin: 14px auto 0;
  padding: 0;
  color: #222;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
}

.steps {
  width: min(100%, 850px);
  margin: 45px auto 0;
}

.steps article {
  display: flex;
  gap: 22px;
  padding: 25px 0;
  border-bottom: 1px solid #ccc;
}

.steps article > span {
  display: grid;
  flex-shrink: 0;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #111;
  color: var(--accent);
  font-weight: 900;
}

.steps h3 {
  margin: 0;
}

.steps p {
  margin: 5px 0 0;
  color: #666;
}

.stars {
  color: var(--accent) !important;
  letter-spacing: 0.12em;
}

.review-card small {
  color: #777;
}

.faq {
  width: min(100%, 900px);
  margin: 45px auto 0;
}

.faq details {
  margin-bottom: 12px;
  padding: 20px 24px;
  border: 1px solid #ddd;
  border-radius: 14px;
  background: #fff;
}

.faq summary {
  font-weight: 800;
  cursor: pointer;
}

.faq details p {
  color: #666;
}

.contact-section {
  padding: 100px 7%;
  text-align: center;
  background:
    radial-gradient(
      circle,
      rgba(246, 196, 83, 0.17),
      transparent 45%
    ),
    var(--background);
}

.contact-section h2 {
  margin: 0;
  font-size: clamp(35px, 6vw, 70px);
}

.contact-section p {
  margin-bottom: 28px;
  color: var(--subtext);
}

footer {
  padding: 35px 20px 100px;
  text-align: center;
  border-top: 1px solid var(--line);
  color: var(--subtext);
  font-size: 13px;
}

.fixed-contact {
  display: none;
}

.price-image {
    width: 100%;
    max-width: 800px;
    margin: 40px auto;
}

.price-image img {
    display: block;
    width: 100%;
    height: auto;
}

.price-image img {
    width: 900px;
    max-width: 100%;
    height: auto;
}

/* 石垢一覧 */
.account-data {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}

.stone-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
}

.stone-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.stone-info strong {
  font-size: 17px;
}

.stone-info span {
  color: var(--accent);
  font-size: 18px;
  font-weight: 900;
}

.device-info {
  margin: 8px 0 0;
  color: var(--subtext);
  font-size: 14px;
}

.account-notice {
  margin-top: 20px;
  padding: 15px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
}

.account-notice p {
  margin: 6px 0;
  color: var(--subtext);
  font-size: 14px;
}

/* =========================
   アカウント在庫一覧
========================= */

.stock-buttons {
  width: 90%;
  max-width: 900px;
  margin: 40px auto 60px;

  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}


/* =========================
   在庫カード
========================= */

.stock-card {
  position: relative;

  display: flex;
  flex-direction: column;

  padding: 24px 26px;

  color: #fff;
  text-decoration: none;

  background:
    linear-gradient(
      135deg,
      rgba(30, 30, 40, 0.98),
      rgba(12, 12, 18, 0.98)
    );

  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 15px;

  overflow: hidden;

  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.22);

  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}


/* 左側ゴールドライン */

.stock-card::before {
  content: "";

  position: absolute;
  left: 0;
  top: 0;

  width: 4px;
  height: 100%;

  background: linear-gradient(
    to bottom,
    #ffcc33,
    #ff8a00
  );
}


/* 右上の光 */

.stock-card::after {
  content: "";

  position: absolute;

  width: 180px;
  height: 180px;

  right: -90px;
  top: -90px;

  background: rgba(255, 190, 40, 0.08);

  border-radius: 50%;

  filter: blur(20px);

  pointer-events: none;
}


 /* =========================
    在庫一覧
 ========================= */

.stock-grid {
  width: 90%;
  max-width: 850px;
  margin: 40px auto 60px;

  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}


/* =========================
   在庫カード
 ========================= */

.account-data {
  display: contents;
}

.stone-item {
  position: relative;

  padding: 22px 24px;

  box-sizing: border-box;

  background:
    linear-gradient(
      135deg,
      rgba(30, 30, 40, 0.98),
      rgba(12, 12, 18, 0.98)
    );

  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 15px;

  overflow: hidden;

  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.22);

  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}


/* 左側ゴールドライン */

.stone-item::before {
  content: "";

  position: absolute;
  left: 0;
  top: 0;

  width: 4px;
  height: 100%;

  background: linear-gradient(
    to bottom,
    #ffcc33,
    #ff8a00
  );
}


/* 右上の光 */

.stone-item::after {
  content: "";

  position: absolute;

  width: 180px;
  height: 180px;

  right: -90px;
  top: -90px;

  background: rgba(255, 190, 40, 0.08);

  border-radius: 50%;

  filter: blur(20px);

  pointer-events: none;
}


/* =========================
   商品情報
 ========================= */

.stone-info {
  position: relative;
  z-index: 2;

  display: flex;
  flex-direction: column;
  gap: 5px;
}


/* 石数 */

.stone-info strong {
  font-size: 18px;
  font-weight: 700;

  color: #fff;
}


/* 価格 */

.stone-info span {
  font-size: 23px;
  font-weight: 800;

  color: #ffcc33;
}


/* 1000個あたり */

.stone-info a {
  font-size: 11px;

  color: rgba(255, 255, 255, 0.50);
}


/* =========================
   対応端末
 ========================= */

.device-info {
  position: relative;
  z-index: 2;

  margin: 15px 0 0;
  padding-top: 12px;

  font-size: 12px;

  color: rgba(255, 255, 255, 0.70);

  border-top: 1px solid rgba(255, 255, 255, 0.08);
}


/* =========================
   ホバー
 ========================= */

.stone-item:hover {
  transform: translateY(-4px);

  border-color: rgba(255, 190, 40, 0.40);

  box-shadow:
    0 15px 40px rgba(0, 0, 0, 0.30);
}


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

.account-notice {
  grid-column: 1 / -1;

  margin-top: 5px;
  padding: 18px 22px;

  background: rgba(255, 255, 255, 0.035);

  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
}

.account-notice p {
  margin: 5px 0;

  font-size: 12px;

  color: rgba(255, 255, 255, 0.55);
}


/* =========================
   スマホ
 ========================= */

@media (max-width: 650px) {

  .stock-grid {
    width: 90%;

    grid-template-columns: 1fr;

    gap: 14px;

    margin-top: 30px;
  }

  .stone-item {
    padding: 20px 21px;
  }

  .stone-info strong {
    font-size: 16px;
  }

  .stone-info span {
    font-size: 21px;
  }

  .device-info {
    font-size: 11px;
  }

  .account-notice {
    padding: 15px 17px;
  }

  .account-notice p {
    font-size: 11px;
  }
}

 /* =========================
    ツムツムはこちら
 ========================= */

.game-link-card {
  position: relative;

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

  width: 90%;
  max-width: 650px;
  min-height: 110px;

  margin: 37px auto;

  padding: 22px 55px 22px 30px;

  box-sizing: border-box;

  color: #fff;
  text-decoration: none;
  text-align: center;

  background:
    linear-gradient(
      135deg,
      rgba(30, 30, 40, 0.98),
      rgba(12, 12, 18, 0.98)
    );

  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 15px;

  overflow: hidden;

  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.22);

  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}


/* 左側ゴールドライン */

.game-link-card::before {
  content: "";

  position: absolute;
  left: 0;
  top: 0;

  width: 4px;
  height: 100%;

  background: linear-gradient(
    to bottom,
    #ffcc33,
    #ff8a00
  );
}


/* 右上の光 */

.game-link-card::after {
  content: "";

  position: absolute;

  width: 180px;
  height: 180px;

  right: -70px;
  top: -90px;

  background: rgba(255, 190, 40, 0.10);

  border-radius: 50%;

  filter: blur(20px);

  transition: 0.4s ease;
}


/* 中央 */

.game-link-content {
  position: relative;
  z-index: 2;

  display: flex;
  flex-direction: column;
  align-items: center;
}


/* 英字 */

.game-link-label {
  margin-bottom: 5px;

  font-size: 10px;
  font-weight: 700;

  letter-spacing: 2px;

  color: #ffbd2e;
}


/* タイトル */

.game-link-card h2 {
  margin: 0;

  font-size: 20px;
  font-weight: 700;

  letter-spacing: 0.5px;
}


/* 説明 */

.game-link-card p {
  margin: 5px 0 0;

  font-size: 12px;

  color: rgba(255, 255, 255, 0.60);
}


/* 矢印 */

.game-link-arrow {
  position: absolute;
  z-index: 2;

  right: 22px;

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

  width: 34px;
  height: 34px;

  font-size: 17px;

  color: #fff;

  background: rgba(255, 255, 255, 0.07);

  border: 1px solid rgba(255, 255, 255, 0.10);

  border-radius: 50%;

  transition:
    transform 0.3s ease,
    background 0.3s ease;
}


/* ホバー */

.game-link-card:hover {
  transform: translateY(-4px);

  border-color: rgba(255, 190, 40, 0.45);

  box-shadow:
    0 15px 40px rgba(0, 0, 0, 0.30);
}

.game-link-card:hover .game-link-arrow {
  transform: translateX(4px);

  background: rgba(255, 190, 40, 0.18);
}


/* スマホ */

@media (max-width: 600px) {

  .game-link-card {
    width: 90%;
    min-height: 100px;

    margin: 35px auto;

    padding: 20px 50px 20px 20px;
  }

  .game-link-card h2 {
    font-size: 17px;
  }

  .game-link-card p {
    font-size: 11px;
  }

  .game-link-arrow {
    right: 15px;

    width: 30px;
    height: 30px;

    font-size: 15px;
  }
}

@media (max-width: 800px) {
  .header {
    padding: 14px 18px;
  }

  .header-button {
    display: none;
  }

  .hero {
    min-height: 820px;
    padding: 120px 22px 70px;
  }

  .hero-numbers {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-numbers div {
    min-width: 0;
  }

  .section {
    padding: 75px 22px;
  }

  .card-grid,
  .price-grid {
    grid-template-columns: 1fr;
  }

  .slider {
    gap: 7px;
  }

@media (max-width: 800px) {

  .slider-window {
    width: 90%;
    max-width: 320px;   /* お好みで300〜380pxに調整 */
    margin: 0 auto;
  }

  .slider-track img {
    width: 100%;
    height: auto;
    display: block;
  }

}

  .slider-button {
    width: 36px;
    height: 36px;
    font-size: 24px;
  }

  .fixed-contact {
    position: fixed;
    z-index: 200;
    right: 15px;
    bottom: 15px;
    left: 15px;
    display: block;
    padding: 15px;
    border-radius: 999px;
    background: var(--accent);
    color: #111;
    font-weight: 900;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.35);
  }
  
}