/* ============================================================
   第2弾 4社合同ビジネス交流会 2026 — style.css
   Author  : Claude Code
   Created : 2026-03-24
   Encoding: UTF-8
============================================================ */

/* ──────────────────────────────────────────
   0. CSS Variables (:root)
────────────────────────────────────────── */
:root {
  /* カラーパレット */
  --color-navy:        #0D1F3C;
  --color-navy-mid:    #172A4E;
  --color-navy-light:  #1E3A6A;
  --color-gold:        #C9A84C;
  --color-gold-light:  #E8C97A;
  --color-gold-dark:   #A07C28;
  --color-white:       #FFFFFF;
  --color-off-white:   #F8F6F0;
  --color-text:        #2C2C2C;
  --color-text-muted:  #666666;
  --color-text-light:  rgba(255, 255, 255, 0.85);
  --color-border:      rgba(201, 168, 76, 0.3);
  --color-border-light:rgba(255, 255, 255, 0.15);

  /* フォント */
  --font-heading: 'Noto Serif JP', 'Georgia', serif;
  --font-body:    'Noto Sans JP', 'Helvetica Neue', 'Arial', sans-serif;

  /* スペーシング */
  --section-pad:      96px;
  --section-pad-sp:   64px;
  --container-width:  1140px;
  --container-pad:    24px;
  --nav-height:       72px;
  --radius:           8px;
  --radius-lg:        16px;
  --radius-xl:        24px;

  /* シャドウ */
  --shadow-card:      0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-gold:      0 4px 20px rgba(201, 168, 76, 0.30);
  --shadow-nav:       0 2px 20px rgba(0, 0, 0, 0.20);

  /* トランジション */
  --transition:       0.3s ease;
  --transition-slow:  0.6s ease;
}

/* ──────────────────────────────────────────
   1. Reset & Base
────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

address {
  font-style: normal;
}

button {
  cursor: pointer;
  font-family: var(--font-body);
}

/* ──────────────────────────────────────────
   2. Utility
────────────────────────────────────────── */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section-pad {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
}

.bg-dark {
  background-color: var(--color-navy);
}

/* セクションラベル */
.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-label--gold {
  color: var(--color-gold);
}

/* セクションタイトル */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.3;
  margin-bottom: 16px;
}

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

/* セクションリード文 */
.section-lead {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 48px;
  line-height: 1.8;
}

.section-lead--light {
  color: var(--color-text-light);
}

/* ──────────────────────────────────────────
   3. Button
────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: center;
  border: 2px solid transparent;
  transition: background-color var(--transition),
              color var(--transition),
              border-color var(--transition),
              box-shadow var(--transition),
              transform var(--transition);
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.btn-gold {
  background-color: var(--color-gold);
  color: var(--color-navy);
  border-color: var(--color-gold);
}

.btn-gold:hover,
.btn-gold:focus-visible {
  background-color: var(--color-gold-light);
  border-color: var(--color-gold-light);
  box-shadow: var(--shadow-gold);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: var(--color-white);
}

.btn-navy-outline {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-navy-outline:hover,
.btn-navy-outline:focus-visible {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.btn-submit {
  padding: 16px 48px;
  font-size: 1.05rem;
}

/* ──────────────────────────────────────────
   4. Scroll Reveal Animation
────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ──────────────────────────────────────────
   5. Navigation
────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: transparent;
  transition: background-color var(--transition),
              box-shadow var(--transition);
}

.nav.scrolled {
  background-color: var(--color-navy);
  box-shadow: var(--shadow-nav);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ロゴ */
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  color: var(--color-white);
  transition: opacity var(--transition);
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-logo__main {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.nav-logo__year {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--color-gold);
}

/* メニュー */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.05em;
  position: relative;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background-color: var(--color-gold);
  color: var(--color-navy);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: background-color var(--transition),
              box-shadow var(--transition),
              transform var(--transition);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background-color: var(--color-gold-light);
  box-shadow: var(--shadow-gold);
  transform: translateY(-1px);
  outline: none;
}

/* ハンバーガー */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  padding: 0;
  z-index: 1100;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition),
              opacity var(--transition);
  transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

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

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ──────────────────────────────────────────
   6. Hero
────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1540575467063-178a50c2df87?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 10s ease;
}

.hero:hover .hero-bg {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(13, 31, 60, 0.88) 0%,
    rgba(13, 31, 60, 0.70) 50%,
    rgba(30, 58, 106, 0.75) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 80px;
}

/* カウントダウン */
.hero-countdown {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: rgba(201, 168, 76, 0.15);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 8px 20px;
  margin-bottom: 24px;
}

.countdown-label {
  font-size: 0.8rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.countdown-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1;
}

.countdown-unit {
  font-size: 0.9rem;
  color: var(--color-gold);
}

/* バッジ */
.hero-badge {
  display: inline-block;
  background-color: var(--color-gold);
  color: var(--color-navy);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 24px;
}

/* タイトル */
.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 32px;
}

.hero-title--sub {
  display: block;
  font-size: clamp(1.1rem, 2.5vw, 1.8rem);
  font-weight: 400;
  color: var(--color-gold-light);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.hero-title--en {
  display: block;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.1;
}

/* メタ情報 */
.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  color: rgba(255, 255, 255, 0.9);
}

.hero-meta-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* CTAボタン群 */
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* スクロールヒント */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: opacity var(--transition-slow);
}

.hero-scroll-hint.hidden {
  opacity: 0;
  pointer-events: none;
}

.hero-scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
  animation: scrollLine 1.6s ease-in-out infinite;
}

.hero-scroll-text {
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  text-transform: uppercase;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top;    opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top;    opacity: 1; }
  51%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ──────────────────────────────────────────
   7. About（イベント詳細）
────────────────────────────────────────── */
.about {
  background-color: var(--color-off-white);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.about-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--color-gold);
  transition: transform var(--transition), box-shadow var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.14);
}

.about-card__icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: block;
}

.about-card__title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.about-card__body {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-navy);
  line-height: 1.6;
}

.about-card__price {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: 4px;
}

.about-card__price-unit {
  font-size: 1.1rem;
  font-weight: 400;
}

.about-card__capacity {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: 4px;
}

.about-card__capacity-unit {
  font-size: 1.1rem;
  font-weight: 400;
}

.about-card__note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* ──────────────────────────────────────────
   8. Highlights（参加特典）
────────────────────────────────────────── */
.highlights {
  background-color: var(--color-navy);
  position: relative;
  overflow: hidden;
}

/* 背景装飾（任意） */
.highlights::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,168,76,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.highlight-card {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: background-color var(--transition),
              border-color var(--transition),
              transform var(--transition);
}

.highlight-card:hover {
  background-color: rgba(255, 255, 255, 0.10);
  border-color: var(--color-gold);
  transform: translateY(-4px);
}

.highlight-card__icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 20px;
}

.highlight-card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold-light);
  margin-bottom: 16px;
  line-height: 1.4;
}

.highlight-card__body {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.highlight-card__img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

/* ──────────────────────────────────────────
   9. Organizers（主催企業）
────────────────────────────────────────── */
.organizers {
  background-color: var(--color-off-white);
}

.organizers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.organizer-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

.organizer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

/* ロゴプレースホルダー（実ロゴ画像差し替え前の仮表示） */
.organizer-card__logo {
  width: 100%;
  height: 80px;
  background-color: var(--color-navy);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.organizer-card__logo img {
  max-height: 60px;
  width: auto;
  object-fit: contain;
}

.organizer-card__logo-text {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  text-align: center;
  line-height: 1.4;
}

.organizer-card__name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ロゴ画像を実ファイルで表示する場合 */
.organizer-card__logo--img {
  background-color: var(--color-white);
  border: 1px solid rgba(0,0,0,0.08);
  padding: 8px;
}

.organizer-card__logo--img img {
  max-height: 56px;
  width: auto;
  object-fit: contain;
  margin: 0 auto;
}

/* ──────────────────────────────────────────
   10. Registration（Google Forms CTA）
────────────────────────────────────────── */
.registration {
  background-color: var(--color-navy-light);
}

.reg-cta-wrap {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.reg-cta-wrap .section-label,
.reg-cta-wrap .section-title,
.reg-cta-wrap .section-lead {
  text-align: center;
}

/* 概要インフォ行 */
.reg-info-row {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  padding: 28px 32px;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.reg-info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.reg-info-icon {
  font-size: 1.5rem;
}

.reg-info-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.reg-info-value {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
}

/* メインCTAボタン */
.btn-reg-main {
  padding: 20px 56px;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-gold);
  margin-bottom: 32px;
}

.btn-reg-main:hover,
.btn-reg-main:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(201, 168, 76, 0.45);
}

/* ボタン＋注意書き 横並び・トップ揃え */
.reg-cta-row {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 注意書き */
.reg-notice {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 2;
  text-align: left;
  margin: 0;
}

/* ──────────────────────────────────────────
   11. Access（アクセス）
────────────────────────────────────────── */
.access {
  background-color: var(--color-white);
}

.access-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.access-info__hotel {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 16px;
}

.access-info__address {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 3px solid var(--color-gold);
}

.access-info__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}

.access-info__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.access-info__icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.access-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  min-height: 400px;
  position: relative;
}

.access-map iframe {
  display: block;
  width: 100%;
  height: 400px;
  border: 0;
}

/* マッププレースホルダー（遅延読み込み前の表示） */
.map-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--color-off-white);
  gap: 8px;
}

.map-placeholder__icon {
  font-size: 2.5rem;
}

.map-placeholder p {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-navy);
}

.map-placeholder__sub {
  font-size: 0.8rem !important;
  color: var(--color-text-muted) !important;
  font-weight: 400 !important;
}

/* ──────────────────────────────────────────
   12. Footer
────────────────────────────────────────── */
.footer {
  background-color: var(--color-navy);
  padding: 64px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 32px;
}

.footer-event-name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.footer-event-sub {
  font-size: 0.9rem;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.footer-event-date {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-nav a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--color-gold);
}

.footer-organizers-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.footer-organizers-list {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-mail {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-gold);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.footer-mail:hover {
  color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}

.footer-bottom {
  text-align: center;
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
}

/* ──────────────────────────────────────────
   13. Responsive — max-width: 768px
────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --section-pad:   var(--section-pad-sp);
    --nav-height:    60px;
  }

  /* Navigation */
  .nav-hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100dvh;
    background-color: var(--color-navy);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 80px 40px 40px;
    gap: 24px;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
    transition: right var(--transition-slow);
    z-index: 1050;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.1rem;
    color: var(--color-white);
  }

  .nav-cta {
    padding: 12px 24px;
    font-size: 1rem;
  }

  /* Overlay when menu open */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1049;
    display: none;
  }

  .nav-overlay.visible {
    display: block;
  }

  /* Hero */
  .hero-content {
    padding-top: calc(var(--nav-height) + 24px);
    padding-bottom: 60px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  /* About */
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Highlights */
  .highlights-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Organizers */
  .organizers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Registration CTA */
  .reg-info-row {
    gap: 24px;
    padding: 20px;
  }

  .reg-cta-row {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .btn-reg-main {
    width: 100%;
    justify-content: center;
    padding: 18px 24px;
  }

  /* Access */
  .access-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .access-map iframe {
    height: 280px;
  }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-title--en {
    font-size: 1.9rem;
  }
}