/* =========================================
   Grand Marina Saigon - 共通スタイル
   モバイルファースト設計
   ========================================= */

:root {
  --color-primary: #0a2540;       /* 深いネイビー(高級感) */
  --color-accent: #c9a96e;        /* ゴールド(Marriottブランド調) */
  --color-accent-dark: #a88a52;
  --color-text: #1a1a1a;
  --color-text-light: #555;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f5f0;
  --color-border: #e5e5e5;
  --color-zalo: #0068ff;          /* Zaloブランドカラー */

  --font-serif: 'Playfair Display', 'Noto Serif JP', Georgia, serif;
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1200px;
  --header-height: 64px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* =========================================
   ヘッダー
   ========================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 37, 64, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.5px;
}

.logo span {
  color: var(--color-accent);
}

.nav-toggle {
  display: block;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

.nav-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-primary);
  flex-direction: column;
  padding: 20px;
  display: none;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.nav-menu.is-open {
  display: flex;
}

.nav-menu a {
  color: #fff;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  font-size: 15px;
}

.lang-switch {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.lang-switch a {
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,0.3);
  font-size: 13px;
  border-radius: 4px;
}

.lang-switch a.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
  font-weight: 600;
}

/* =========================================
   ヒーロー
   ========================================= */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  padding: calc(var(--header-height) + 40px) 20px 40px;
  background:
    linear-gradient(135deg, rgba(10,37,64,0.85) 0%, rgba(10,37,64,0.6) 100%),
    linear-gradient(45deg, #1a3a5c 0%, #0a2540 50%, #c9a96e 100%);
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../images/hero.webp');
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.5s;
  z-index: 0;
}

/* 画像が存在すれば透過設定だけ調整 */
.hero.has-image::before {
  opacity: 0.45;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 500;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 7vw, 56px);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.hero-tagline {
  font-size: clamp(15px, 3.5vw, 18px);
  margin-bottom: 32px;
  opacity: 0.92;
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* =========================================
   ボタン
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-align: center;
  min-width: 220px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.btn-zalo {
  background: var(--color-zalo);
  color: #fff;
}

.btn-zalo:hover {
  background: #0052cc;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid #fff;
}

.btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}

/* =========================================
   セクション共通
   ========================================= */
.section {
  padding: 64px 0;
}

.section-soft {
  background: var(--color-bg-soft);
}

.section-dark {
  background: var(--color-primary);
  color: #fff;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
}

.section h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 600;
  margin: 8px 0 16px;
  line-height: 1.2;
}

.section-lead {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-text-light);
  font-size: 16px;
}

.section-dark .section-lead {
  color: rgba(255,255,255,0.8);
}

/* =========================================
   特徴グリッド
   ========================================= */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.feature-card {
  background: #fff;
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.08);
}

.feature-icon {
  font-size: 36px;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 14px;
  line-height: 1.6;
}

/* =========================================
   立地セクション
   ========================================= */
.location-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.location-image {
  aspect-ratio: 4/3;
  background:
    linear-gradient(135deg, rgba(10,37,64,0.6), rgba(201,169,110,0.3)),
    linear-gradient(45deg, #2c5282 0%, #1a3a5c 100%);
  background-size: cover;
  background-position: center;
  border-radius: 8px;
}

.location-list {
  list-style: none;
}

.location-list li {
  padding: 12px 0 12px 32px;
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.location-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 12px;
  width: 22px;
  height: 22px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

/* =========================================
   お問い合わせフォーム
   ========================================= */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-info {
  text-align: center;
}

.contact-zalo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-zalo);
  color: #fff;
  padding: 16px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 16px;
  margin: 16px 0;
}

.contact-phone {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.contact-form {
  background: #fff;
  padding: 32px 24px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-note {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 12px;
  text-align: center;
}

.btn-submit {
  width: 100%;
  background: var(--color-primary);
  color: #fff;
  padding: 14px;
  border: none;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.btn-submit:hover {
  background: #051a2e;
}

/* =========================================
   フッター
   ========================================= */
.site-footer {
  background: #051a2e;
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
  font-size: 13px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.footer-grid a {
  display: block;
  padding: 4px 0;
  color: rgba(255,255,255,0.7);
}

.footer-grid a:hover {
  color: var(--color-accent);
}

.footer-disclaimer {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 16px;
  font-size: 11px;
  line-height: 1.6;
  color: rgba(255,255,255,0.5);
  text-align: center;
}

/* =========================================
   フローティングZaloボタン
   ========================================= */
.zalo-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--color-zalo);
  color: #fff;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 6px 20px rgba(0, 104, 255, 0.4);
  z-index: 50;
  transition: transform 0.2s;
}

.zalo-float:hover {
  transform: scale(1.05);
}

/* =========================================
   タブレット以上
   ========================================= */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    display: flex;
    flex-direction: row;
    background: transparent;
    padding: 0;
    align-items: center;
    gap: 24px;
    border: none;
  }

  .nav-menu a {
    border: none;
    padding: 8px 0;
    font-size: 14px;
  }

  .lang-switch {
    margin-top: 0;
    margin-left: 16px;
  }

  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }

  .features {
    grid-template-columns: repeat(3, 1fr);
  }

  .location-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-wrap {
    grid-template-columns: 1fr 1.2fr;
    align-items: start;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .section {
    padding: 96px 0;
  }
}

@media (min-width: 1024px) {
  .features {
    gap: 32px;
  }
}

/* =========================================
   サブページ用スタイル
   ========================================= */

/* ページヒーロー(下層ページ用) */
.page-hero {
  padding: calc(var(--header-height) + 60px) 20px 60px;
  background: linear-gradient(135deg, #0a2540 0%, #1a3a5c 70%, #c9a96e 100%);
  color: #fff;
  text-align: center;
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 5.5vw, 44px);
  font-weight: 600;
  margin-bottom: 12px;
}

.page-hero p {
  max-width: 700px;
  margin: 0 auto;
  opacity: 0.9;
  font-size: clamp(14px, 3vw, 17px);
}

/* パンくず */
.breadcrumb {
  background: var(--color-bg-soft);
  padding: 12px 0;
  font-size: 13px;
  color: var(--color-text-light);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: '›';
  margin-left: 8px;
  color: var(--color-text-light);
}

.breadcrumb a {
  color: var(--color-accent-dark);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* 記事本文 */
.article {
  max-width: 820px;
  margin: 0 auto;
}

.article h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 4.2vw, 30px);
  margin: 40px 0 16px;
  color: var(--color-primary);
}

.article h3 {
  font-family: var(--font-serif);
  font-size: clamp(18px, 3.5vw, 22px);
  margin: 28px 0 12px;
  color: var(--color-primary);
}

.article p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.article ul, .article ol {
  margin: 0 0 20px 24px;
}

.article li {
  margin-bottom: 8px;
}

.article strong {
  color: var(--color-primary);
}

.article blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 12px 20px;
  margin: 24px 0;
  background: var(--color-bg-soft);
  font-style: italic;
  color: var(--color-text-light);
}

/* テーブル */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 32px;
  font-size: 14px;
}

.spec-table th,
.spec-table td {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.spec-table th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
}

.spec-table tr:nth-child(even) td {
  background: var(--color-bg-soft);
}

.spec-table td:first-child {
  font-weight: 600;
}

/* 情報ボックス */
.info-box {
  background: var(--color-bg-soft);
  border-left: 4px solid var(--color-accent);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 4px;
}

.info-box h4 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

/* CTAバナー */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a3a5c 100%);
  color: #fff;
  padding: 40px 24px;
  border-radius: 8px;
  text-align: center;
  margin: 40px 0;
}

.cta-banner h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  margin-bottom: 12px;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 20px;
}

/* FAQ アコーディオン */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}

.faq-item summary {
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  padding: 8px 0;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  color: var(--color-accent);
  font-weight: 400;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item summary:hover {
  color: var(--color-accent-dark);
}

.faq-answer {
  padding: 12px 0 8px;
  color: var(--color-text-light);
  line-height: 1.7;
  font-size: 15px;
}

/* 関連ページ */
.related-pages {
  background: var(--color-bg-soft);
  padding: 48px 0;
  margin-top: 60px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
}

.related-card {
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: all 0.2s;
}

.related-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}

.related-card h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  margin-bottom: 8px;
  font-size: 18px;
}

.related-card p {
  color: var(--color-text-light);
  font-size: 14px;
}

/* 価格カード */
.price-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 32px 0;
}

.price-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 28px 24px;
  text-align: center;
}

.price-card.featured {
  border: 2px solid var(--color-accent);
  position: relative;
}

.price-card.featured::before {
  content: 'Phổ biến';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
}

.price-card h3 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  font-size: 22px;
  margin-bottom: 8px;
}

.price-card .price {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin: 12px 0;
}

.price-card .price small {
  font-size: 13px;
  color: var(--color-text-light);
  font-weight: 400;
}

.price-card ul {
  list-style: none;
  text-align: left;
  margin: 16px 0;
}

.price-card ul li {
  padding: 6px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--color-border);
}

.price-card ul li::before {
  content: '✓ ';
  color: var(--color-accent);
  font-weight: 700;
  margin-right: 6px;
}

/* タイムライン(ニュース) */
.timeline {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  padding-left: 24px;
  border-left: 2px solid var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-date {
  font-size: 13px;
  color: var(--color-accent-dark);
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-item h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-item p {
  color: var(--color-text-light);
  font-size: 15px;
}

/* タブレット以上 */
@media (min-width: 768px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .price-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* =========================================
   画像ギャラリー
   ========================================= */

/* 画像 + キャプション(単体) */
.media-figure {
  margin: 24px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.media-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.media-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background: var(--color-bg-soft);
  text-align: center;
  font-style: italic;
}

/* 2カラム画像 */
.media-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0;
}

.media-row figure {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.media-row img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}

.media-row figure:hover img {
  transform: scale(1.03);
}

/* ギャラリー(3〜4列) */
.media-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0;
}

.media-grid figure {
  margin: 0;
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 1/1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.media-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}

.media-grid figure:hover img {
  transform: scale(1.05);
}

/* ヒーロー画像のオーバーレイ */
.hero-image-bg {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* ページヒーローに画像背景 */
.page-hero.has-bg {
  background-image:
    linear-gradient(135deg, rgba(10,37,64,0.78) 0%, rgba(10,37,64,0.55) 100%),
    var(--bg-image);
  background-size: cover;
  background-position: center;
}

/* 機能カード内画像 */
.feature-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 16px;
}

/* バナー画像(大型) */
.banner-image {
  width: 100%;
  aspect-ratio: 21/9;
  object-fit: cover;
  border-radius: 8px;
  margin: 32px 0;
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

@media (min-width: 768px) {
  .media-row {
    grid-template-columns: 1fr 1fr;
  }

  .media-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}