/* ===========================
   リセット & ベース
=========================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

* :has(> wbr) {
  word-break: keep-all;
  overflow-wrap: anywhere;
}

:root {
  --kiyo-navy: #1a2b5e;
  --kiyo-gold: #c8a84b;
  --kiyo-gold-light: #e8c96a;
  --cerezo-pink: #e8005a;
  --cerezo-pink-lt: #ff4d8a;
  --cerezo-dark: #c0003a;
  --white: #ffffff;
  --off-white: #f7f5f2;
  --light-gray: #efefef;
  --mid-gray: #888;
  --dark-gray: #333;

  --font-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --font-en: 'Oswald', sans-serif;

  --container-max: 1200px;
  --container-px: 48px;
  --section-py: 96px;
  --header-h: 68px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ja);
  color: var(--dark-gray);
  background: var(--white);
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* ===========================
   コンテナ
=========================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

/* ===========================
   ヘッダー
=========================== */
.site-header {
  background: var(--kiyo-navy);
  height: var(--header-h);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 16px rgba(0, 0, 0, .35);
}

.header-inner {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-px);
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-logo {
  flex-shrink: 0;
}

.header-logo img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
}

.header-logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

/* PC ナビ */
.pc-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  font-size: 14px;
  font-weight: 700;
  color: rgba(255, 255, 255, .82);
  padding: 8px 16px;
  letter-spacing: .04em;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--white);
  border-bottom-color: var(--kiyo-gold);
}

.nav-link--cta {
  background: var(--cerezo-pink);
  color: var(--white) !important;
  padding: 10px 24px;
  border-bottom: none !important;
  transition: background .2s, transform .15s;
}

.nav-link--cta:hover {
  background: var(--cerezo-pink-lt);
  transform: translateY(-1px);
}

/* ハンバーガーボタン */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 8px;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--white);
  transition: transform .3s ease, opacity .3s ease;
  transform-origin: center;
}

.hamburger.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.hamburger.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* SP ドロワーナビ */
.sp-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  right: 0;
  width: 280px;
  height: calc(100dvh - var(--header-h));
  background: var(--kiyo-navy);
  flex-direction: column;
  z-index: 300;
  transform: translateX(100%);
  transition: transform .35s cubic-bezier(.4, 0, .2, 1);
  overflow-y: auto;
}

.sp-nav.is-open {
  transform: translateX(0);
}

.sp-nav-link {
  display: block;
  padding: 20px 32px;
  font-size: 16px;
  font-weight: 700;
  color: rgba(255, 255, 255, .85);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  letter-spacing: .04em;
  transition: background .2s, color .2s;
}

.sp-nav-link:hover {
  background: rgba(255, 255, 255, .07);
  color: var(--white);
}

.sp-nav-link--cta {
  margin: 24px 20px 0;
  padding: 16px 20px;
  background: var(--cerezo-pink);
  color: var(--white) !important;
  text-align: center;
  border-bottom: none;
}

.sp-nav-link--cta:hover {
  background: var(--cerezo-pink-lt);
}

/* オーバーレイ */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  z-index: 250;
  opacity: 0;
  transition: opacity .35s;
}

.nav-overlay.is-visible {
  opacity: 1;
}

/* ===========================
   キービジュアル（全幅・SP両サイドカット）
=========================== */
.kv-section {
  width: 100%;
  overflow: hidden;
  background: #f0e8e8;
  line-height: 0;
}

.kv-wrapper {
  width: 100%;
  /* PC: 画像をそのまま全幅表示 */
}

.kv-image {
  width: 100%;
  height: auto;
  display: block;
  /* PC: object-fit 不要、img 自体を 100% に */
}

/* SP: 両サイドをカットして縦長に見せる */
@media (max-width: 768px) {
  .kv-section {
    /* 画像の縦横比 1456×816 ≒ 16:9 → SP では高さを固定してクロップ */
    /* height: 56vw;
    min-height: 220px;
    max-height: 420px; */
  }

  .kv-wrapper {
    width: 100%;
    height: 100%;
    overflow: hidden;
  }

  .kv-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
  }
}

/* ===========================
   セクション共通
=========================== */
.section-label {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .28em;
  color: var(--cerezo-pink);
  margin-bottom: 10px;
  text-align: center;
}

.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  color: var(--kiyo-navy);
  margin-bottom: 40px;
  line-height: 1.3;
  padding-bottom: 18px;
  border-bottom: 3px solid var(--kiyo-navy);
  text-align: center;
}

/* ===========================
   キャンペーン概要
=========================== */
.campaign-summary {
  background: linear-gradient(160deg, #0d1f55 0%, #1a2b6e 45%, #0d1a48 100%);
  padding: 80px var(--container-px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.campaign-summary::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 50%, rgba(232, 0, 90, .13) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 50%, rgba(200, 168, 75, .10) 0%, transparent 55%);
  pointer-events: none;
}

.summary-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .3em;
  color: var(--kiyo-gold);
  border: 1.5px solid var(--kiyo-gold);
  padding: 6px 24px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.summary-title {
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 600;
  color: var(--white);
  line-height: 1.55;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.summary-title strong {
  font-weight: 900;
}

.highlight-text {
  color: var(--kiyo-gold-light);
  font-weight: 900;

}

.summary-sub {
  font-size: clamp(16px, 2.2vw, 21px);
  color: rgba(255, 255, 255, .85);
  line-height: 2.1;
  position: relative;
  z-index: 1;
}

.summary-sub strong {
  color: var(--white);
  font-weight: 700;
}

.summary-highlight {
  display: inline-block;
  margin-top: 10px;
  color: var(--kiyo-gold-light);
  font-weight: 900;
  font-size: 1.08em;
}

/* ===========================
   賞品（期間・締め切りを内包）
=========================== */
.prize-section {
  padding: var(--section-py) var(--container-px);
  background: var(--off-white);
  text-align: center;
}

.prize-card {
  background: var(--white);
  padding: 52px 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  max-width: 800px;
  margin: 0 auto 40px;
  border: 2px solid var(--kiyo-gold);
  border-top: 5px solid var(--cerezo-pink);
  box-shadow: 0 6px 32px rgba(26, 43, 94, .10);
}

.prize-icon {
  font-size: 72px;
  flex-shrink: 0;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(200, 168, 75, .3));
}

.prize-content {
  text-align: center;
}

.prize-name {
  font-size: 15px;
  color: var(--mid-gray);
  margin-bottom: 10px;
  font-weight: 500;
}

.prize-main {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  color: var(--kiyo-navy);
  line-height: 1.35;
  margin-bottom: 12px;
}

.prize-note {
  font-size: 16px;
  font-weight: 500;
  color: var(--mid-gray);
}

.prize-count {
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--cerezo-pink);
  font-weight: 900;
}

.prize-count strong {
  font-size: clamp(26px, 3.5vw, 34px);
}

/* 期間グリッド（賞品セクション内） */
.period-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.period-item {
  background: var(--light-gray);
  padding: 36px 10px;
  text-align: center;
  border-top: 5px solid var(--kiyo-navy);
}

.period-item.deadline {
  border-top-color: var(--cerezo-pink);
  background: #fff0f4;
}

.period-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--mid-gray);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.period-date {
  font-size: clamp(15px, 2vw, 19px);
  font-weight: 700;
  color: var(--kiyo-navy);
  line-height: 1.6;
}

.period-sep {
  margin: 0 6px;
  color: var(--mid-gray);
}

.deadline-date {
  display: block;
  font-size: clamp(19px, 2.8vw, 26px);
  font-weight: 900;
  color: var(--cerezo-pink);
}

.deadline-time {
  display: block;
  font-size: clamp(14px, 1.8vw, 17px);
  color: var(--cerezo-dark);
  font-weight: 700;
  margin-top: 6px;
}

/* ===========================
   試合情報
=========================== */
.match-section {
  padding: var(--section-py) var(--container-px);
  background: var(--white);
  text-align: center;
}

.match-card {
  background: var(--off-white);
  overflow: hidden;
  box-shadow: 0 6px 32px rgba(26, 43, 94, .10);
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--light-gray);
  border-top: 5px solid var(--kiyo-navy);
}

.match-league {
  background: var(--kiyo-navy);
  color: var(--white);
  text-align: center;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .08em;
}

.match-info {
  padding: 52px 48px;
  text-align: center;
}

.match-date-wrap {
  margin-bottom: 36px;
}

.match-date {
  display: inline-block;
  background: var(--kiyo-gold);
  color: var(--kiyo-navy);
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 900;
  padding: 12px 36px;
  letter-spacing: .05em;
  box-shadow: 0 4px 16px rgba(200, 168, 75, .3);
}

.match-teams {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.team {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.team-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--mid-gray);
  background: var(--light-gray);
  padding: 4px 14px;
}

.team-name {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 900;
  color: var(--kiyo-navy);
}

.team-name.cerezo {
  color: var(--cerezo-pink);
}

.match-vs {
  font-family: var(--font-en);
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 700;
  color: var(--kiyo-gold);
  flex-shrink: 0;
}

.match-question {
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--dark-gray);
  line-height: 1.9;
  margin-bottom: 14px;
}

.match-question strong {
  color: var(--cerezo-pink);
  font-weight: 900;
}

.match-note {
  font-size: 13px;
  color: var(--mid-gray);
  background: var(--light-gray);
  display: inline-block;
  padding: 5px 16px;
}

/* ===========================
   応募方法
=========================== */
.how-section {
  padding: var(--section-py) var(--container-px);
  background: var(--off-white);
  text-align: center;
}

.steps {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  background: var(--white);
  padding: 32px 40px;
  border-left: 5px solid var(--kiyo-navy);
}

.step-num {
  font-family: var(--font-en);
  font-size: 40px;
  font-weight: 700;
  color: var(--kiyo-navy);
  line-height: 1;
  flex-shrink: 0;
  min-width: 56px;
  opacity: .7;
}

.step-title {
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 900;
  color: var(--kiyo-navy);
  margin-bottom: 8px;
}

.step-desc {
  font-size: clamp(14px, 1.6vw, 16px);
  color: #666;
  line-height: 1.85;
}

.step-arrow {
  padding-left: calc(5px + 32px + 56px);
  font-size: 22px;
  color: var(--kiyo-gold);
  padding-top: 10px;
  padding-bottom: 10px;
}

/* ===========================
   CTA
=========================== */
.cta-section {
  padding: 104px var(--container-px);
  background: linear-gradient(160deg, #0d1f55 0%, #1a2b6e 45%, #0d1a48 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 50%, rgba(232, 0, 90, .15) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 50%, rgba(200, 168, 75, .12) 0%, transparent 50%);
  pointer-events: none;
}

.cta-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cerezo-pink), var(--kiyo-gold), var(--cerezo-pink));
}

.cta-box {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-lead {
  font-size: clamp(16px, 2.2vw, 20px);
  color: rgba(255, 255, 255, .88);
  margin-bottom: 44px;
  line-height: 1.9;
}

.cta-lead strong {
  color: var(--kiyo-gold-light);
  font-weight: 900;
}

/* ===========================
   ボタン
=========================== */
.btn {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 26px 40px;
  font-family: var(--font-ja);
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
  text-decoration: none;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background .2s;
}

.btn:hover {
  transform: translateY(-4px);
}

.btn:hover::before {
  background: rgba(255, 255, 255, .07);
}

.btn:active {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--cerezo-pink-lt) 0%, var(--cerezo-pink) 50%, var(--cerezo-dark) 100%);
  color: var(--white);
  box-shadow: 0 8px 32px rgba(232, 0, 90, .45);
}

.btn-primary:hover {
  box-shadow: 0 16px 48px rgba(232, 0, 90, .55);
}

.btn-secondary {
  background: rgba(255, 255, 255, .08);
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, .35);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, .15);
  border-color: rgba(255, 255, 255, .65);
  box-shadow: 0 16px 48px rgba(0, 0, 0, .25);
}

.btn-icon {
  font-size: 30px;
  flex-shrink: 0;
  line-height: 1;
}

.btn-text {
  flex: 1;
  text-align: left;
}

.btn-main {
  display: block;
  font-size: clamp(18px, 2.5vw, 23px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: .02em;
}

.btn-sub {
  display: block;
  font-size: 13px;
  font-weight: 400;
  opacity: .75;
  margin-top: 4px;
}

.btn-arrow {
  font-size: 24px;
  flex-shrink: 0;
  opacity: .75;
  transition: transform .2s;
}

.btn:hover .btn-arrow {
  transform: translateX(5px);
  opacity: 1;
}

/* ===========================
   注意事項
=========================== */
.notes-section {
  padding: 72px var(--container-px);
  background: var(--off-white);
}

.notes-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--kiyo-navy);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--kiyo-navy);
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.notes-title::before {
  content: '!';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--kiyo-navy);
  color: var(--white);
  font-size: 14px;
  font-weight: 900;
  flex-shrink: 0;
}

.notes-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.notes-list li {
  font-size: 14px;
  color: #555;
  line-height: 1.9;
  padding-left: 22px;
  position: relative;
}

.notes-list li::before {
  content: '●';
  position: absolute;
  left: 0;
  top: .35em;
  color: var(--kiyo-navy);
  font-size: 8px;
  line-height: 2.6;
}

/* ===========================
   フッター
=========================== */
.site-footer {
  background: var(--kiyo-navy);
  padding: 52px var(--container-px);
  text-align: center;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cerezo-pink), var(--kiyo-gold));
}

.footer-logo img {
  height: 34px;
  width: auto;
  filter: brightness(0) invert(1);
  margin: 0 auto 18px;
}

.footer-logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  display: block;
  margin-bottom: 18px;
}

.footer-copy {
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
  margin-bottom: 10px;
}

.footer-link a {
  font-size: 14px;
  color: rgba(255, 255, 255, .55);
  text-decoration: underline;
  transition: color .2s;
}

.footer-link a:hover {
  color: var(--white);
}

/* ===========================
   フローティングCTA
=========================== */
.floating-cta {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 150;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .3s, transform .3s;
  pointer-events: none;
}

.floating-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.floating-btn {
  display: block;
  background: linear-gradient(135deg, var(--cerezo-pink-lt) 0%, var(--cerezo-pink) 60%, var(--cerezo-dark) 100%);
  color: var(--white);
  font-size: 15px;
  font-weight: 900;
  padding: 16px 32px;
  box-shadow: 0 8px 28px rgba(232, 0, 90, .55);
  transition: transform .2s, box-shadow .2s;
  white-space: nowrap;
  letter-spacing: .04em;
}

.floating-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(232, 0, 90, .65);
}

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

/* 〜 1024px */
@media (max-width: 1024px) {
  :root {
    --container-px: 32px;
    --section-py: 80px;
  }

  .nav-link {
    font-size: 13px;
    padding: 8px 12px;
  }
}

/* 〜 768px : タブレット */
@media (max-width: 768px) {
  :root {
    --container-px: 20px;
    --section-py: 64px;
    --header-h: 60px;
  }

  .pc-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .sp-nav {
    display: flex;
  }

  .period-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
  }

  .prize-card {
    flex-direction: column;
    text-align: center;
    padding: 40px 28px;
  }

  .match-info {
    padding: 36px 24px;
  }

  .step-arrow {
    padding-left: 32px;
  }
}

.spOnly {
  display: none;
}

/* 〜 480px : スマートフォン */
@media (max-width: 480px) {
  :root {
    --container-px: 16px;
    --section-py: 56px;
    --header-h: 56px;
  }

  .spOnly {
    display: block;
  }

  .header-logo img {
    height: 28px;
  }

  .campaign-summary {
    padding: 56px var(--container-px) 64px;
  }

  .btn {
    padding: 20px 22px;
    gap: 14px;
  }

  .btn-icon {
    font-size: 24px;
  }

  .match-teams {
    flex-direction: column;
    gap: 10px;
  }

  .step {
    flex-direction: column;
    gap: 14px;
    padding: 24px 20px;
  }

  .step-num {
    font-size: 30px;
    min-width: auto;
  }

  .step-arrow {
    padding-left: 20px;
  }

  .floating-cta {
    bottom: 16px;
    right: 16px;
    left: 16px;
  }

  .floating-btn {
    text-align: center;
    width: 100%;
    padding: 17px 20px;
  }

  .notes-list li {
    font-size: 13px;
  }

  .prize-card {
    padding: 32px 20px;
  }

  .match-info {
    padding: 32px 16px;
  }

  .sp-nav {
    width: 100%;
  }
}