:root {
  --primary: #3F51B5;
  --primary-light: #7986CB;
  --secondary: #FF9800;
  --accent: #FFD600;
  --bg-dark: #0a0a0a;
  --surface-dark: #1a1a1a;
  --text-light: #ffffff;
  --text-dim: #b0b0b0;
  --gold-gradient: linear-gradient(45deg, #FFD600, #FF9800, #FFD600);
  --neo-gradient: linear-gradient(90deg, #3F51B5, #7986CB);
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ヘッダー */
.header {
  padding: 1rem 2rem;
  background: rgba(10, 10, 10, 0.9);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  text-decoration: none;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* ヒーローセクション */
.hero {
  padding: 10rem 2rem 6rem;
  text-align: center;
  position: relative;
  background: radial-gradient(circle at center, #1a1a2e 0%, #0a0a0a 100%);
}

.hero-badge {
  display: inline-block;
  background: var(--gold-gradient);
  color: #000;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-weight: 900;
  font-size: 0.8rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px rgba(255, 214, 0, 0.4);
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-title .gold {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .neo {
  color: var(--primary-light);
  text-shadow: 0 0 15px rgba(121, 134, 203, 0.6);
}

.hero-subtitle {
  font-size: 1.4rem;
  color: var(--text-dim);
  margin-bottom: 3rem;
}

.hero-subtitle strong {
  color: var(--text-light);
  border-bottom: 2px solid var(--accent);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: var(--gold-gradient);
  color: #000;
  box-shadow: 0 4px 15px rgba(255, 152, 0, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 25px rgba(255, 152, 0, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* フィーチャーセクション */
.features {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 4rem;
  font-weight: 900;
}

.section-title .highlight {
  color: var(--accent);
  text-shadow: 0 0 10px rgba(255, 214, 0, 0.3);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--surface-dark);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gold-gradient);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: rgba(255, 214, 0, 0.2);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.feature-card p {
  color: var(--text-dim);
  font-size: 1rem;
}

/* 悩みセクション */
.problems {
  background: #111;
  padding: 6rem 2rem;
}

.problems-container {
  max-width: 800px;
  margin: 0 auto;
}

.problem-list {
  margin-top: 3rem;
}

.problem-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 1.5rem;
  border-radius: 12px;
  align-items: center;
}

.problem-icon {
  font-size: 2rem;
}

.problem-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  color: #ff5252;
}

.problem-content p {
  color: var(--text-dim);
}

.solution-arrow {
  text-align: center;
  font-size: 3rem;
  margin: 2rem 0;
  color: var(--accent);
}

.solution-box {
  background: var(--gold-gradient);
  color: #000;
  padding: 3rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(255, 152, 0, 0.3);
}

.solution-box h3 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

.solution-box p {
  font-size: 1.2rem;
  font-weight: 700;
}

/* スクリーンショット */
.screenshots {
  padding: 6rem 2rem;
}

.screenshots-container {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 4rem;
}

.phone-mockup {
  width: 280px;
  height: 580px;
  background: #333;
  border-radius: 40px;
  padding: 10px;
  border: 6px solid #444;
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-dark);
  border-radius: 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.screen-icon {
  font-size: 4rem;
  margin-bottom: 2rem;
}

.screen-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
  color: var(--accent);
}

/* CTA */
.cta {
  padding: 8rem 2rem;
  text-align: center;
  background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1518133910546-b6c2fb7d79e3?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
  background-size: cover;
  background-position: center;
}

.jackpot-text {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 4rem;
  font-weight: 900;
  display: block;
}

.store-badges {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
}

.store-badge {
  background: #000;
  color: #fff;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: border-color 0.3s;
}

.store-badge:hover {
  border-color: var(--accent);
}

.store-icon {
  font-size: 2rem;
}

.store-text {
  text-align: left;
}

.store-text small {
  display: block;
  font-size: 0.7rem;
}

.store-text strong {
  font-size: 1.1rem;
}

/* フッター */
.footer {
  padding: 4rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  margin-bottom: 2rem;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  margin: 0 1rem;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.8rem;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  .nav-links {
    display: none;
  }
}