/* ========================================
   Catalyst - 知る前に、叫べ
   Design System & Styles
   ======================================== */

/* CSS Variables */
:root {
  --black: #000000;
  --black-soft: #0a0a0a;
  --black-muted: #141414;
  --gray-dark: #1a1a1a;
  --gray: #2a2a2a;
  --gray-light: #888888;
  --white: #ffffff;
  --white-muted: rgba(255, 255, 255, 0.7);
  --white-subtle: rgba(255, 255, 255, 0.5);

  /* Accent - Emerald */
  --accent: #10b981;
  --accent-light: #34d399;
  --accent-glow: rgba(16, 185, 129, 0.3);

  /* Typography */
  --font-primary: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
  --transition-slam: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--black);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Typography */
.section-label {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-black);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--accent-glow);
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: 1.125rem;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
  letter-spacing: -0.02em;
}

.nav-cta {
  padding: 0.75rem 1.5rem;
  background: var(--white);
  color: var(--black);
  font-weight: var(--font-weight-semibold);
  border-radius: 4px;
  transition: all var(--transition-base);
}

.nav-cta:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-3xl) var(--space-lg);
  background: var(--black);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 900px;
}

.hero-title {
  margin-bottom: var(--space-lg);
}

.hero-title .line {
  display: block;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-title .line.accent {
  color: var(--accent);
  text-shadow: 0 0 80px var(--accent-glow);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--white-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-cta {
  margin-top: var(--space-lg);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--white-subtle);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--white-subtle), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* ========================================
   Problem Section
   ======================================== */
.problem {
  padding: var(--space-3xl) 0;
  background: var(--black-soft);
}

.problem-text {
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.problem-lead {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--white-muted);
  margin-bottom: var(--space-md);
  opacity: 0;
  transform: translateY(30px);
}

.problem-lead.animated {
  opacity: 1;
  transform: translateY(0);
  transition: all var(--transition-slow);
}

.problem-question {
  text-align: center;
}

.problem-question p {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
}

/* ========================================
   Insight Section
   ======================================== */
.insight {
  padding: var(--space-3xl) 0;
  background: var(--black);
}

.insight-main {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.insight-small {
  font-size: 1rem;
  color: var(--white-muted);
  margin-bottom: var(--space-lg);
}

.insight-title {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: var(--font-weight-black);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ========================================
   Method Section
   ======================================== */
.method {
  padding: var(--space-3xl) 0;
  background: var(--black-muted);
}

.method-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.method-card {
  padding: var(--space-xl);
  background: var(--gray-dark);
  border: 1px solid var(--gray);
  border-radius: 8px;
  transition: all var(--transition-base);
}

.method-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.method-number {
  font-size: 3rem;
  font-weight: var(--font-weight-black);
  color: var(--accent);
  opacity: 0.3;
  margin-bottom: var(--space-md);
}

.method-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-md);
}

.method-desc {
  color: var(--white-muted);
  line-height: 1.8;
}

/* ========================================
   Features Section
   ======================================== */
.features {
  padding: var(--space-3xl) 0;
  background: var(--black);
}

.features-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.features-list {
  max-width: 800px;
  margin: 0 auto;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--gray);
}

.feature-item:last-child {
  border-bottom: none;
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-dark);
  border-radius: 12px;
  color: var(--accent);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-content h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xs);
}

.feature-content p {
  color: var(--white-muted);
}

/* ========================================
   Comparison Section
   ======================================== */
.comparison {
  padding: var(--space-3xl) 0;
  background: var(--black-soft);
}

.comparison-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.comparison-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.comparison-col {
  padding: var(--space-xl);
  border-radius: 8px;
}

.comparison-col.old {
  background: var(--gray-dark);
  border: 1px solid var(--gray);
}

.comparison-col.new {
  background: linear-gradient(135deg, var(--gray-dark) 0%, rgba(16, 185, 129, 0.1) 100%);
  border: 1px solid var(--accent);
}

.comparison-label {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--gray);
}

.comparison-col.new .comparison-label {
  color: var(--accent);
  border-color: var(--accent);
}

.comparison-col ul li {
  padding: var(--space-sm) 0;
  color: var(--white-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-col ul li:last-child {
  border-bottom: none;
}

.comparison-col.new ul li {
  color: var(--white);
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
  padding: var(--space-3xl) 0;
  background: var(--black);
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.pricing-card {
  max-width: 500px;
  margin: 0 auto;
  padding: var(--space-2xl);
  background: linear-gradient(135deg, var(--gray-dark) 0%, var(--black-muted) 100%);
  border: 1px solid var(--accent);
  border-radius: 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.pricing-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--black);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 100px;
  margin-bottom: var(--space-lg);
}

.pricing-amount {
  margin-bottom: var(--space-lg);
}

.pricing-amount .currency {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  vertical-align: top;
}

.pricing-amount .price {
  font-size: 4rem;
  font-weight: var(--font-weight-black);
  letter-spacing: -0.02em;
}

.pricing-amount .period {
  font-size: 1rem;
  color: var(--white-muted);
}

.pricing-tagline {
  font-size: 1.125rem;
  color: var(--white-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--space-xl);
}

.pricing-features li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-lg);
  position: relative;
  color: var(--white-muted);
}

.pricing-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

/* ========================================
   Final CTA Section
   ======================================== */
.final-cta {
  padding: var(--space-3xl) 0;
  background: var(--black-muted);
  text-align: center;
}

.final-cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--font-weight-black);
  margin-bottom: var(--space-lg);
}

.final-cta-sub {
  font-size: 1.25rem;
  color: var(--white-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: var(--space-2xl) 0;
  background: var(--black);
  border-top: 1px solid var(--gray);
}

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

.footer-logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--white-muted);
  transition: color var(--transition-fast);
}

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

.footer-copy {
  font-size: 0.75rem;
  color: var(--white-subtle);
}

/* ========================================
   Animations
   ======================================== */

/* Slam Animation */
[data-animate="slam"] {
  opacity: 0;
  transform: translateY(100px) scale(0.9);
}

[data-animate="slam"].animated {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: all var(--transition-slam);
}

/* Fade Up Animation */
[data-animate="fade-up"] {
  opacity: 0;
  transform: translateY(40px);
}

[data-animate="fade-up"].animated {
  opacity: 1;
  transform: translateY(0);
  transition: all var(--transition-slow);
}

/* Stagger children */
.method-grid [data-animate="fade-up"]:nth-child(1) { transition-delay: 0s; }
.method-grid [data-animate="fade-up"]:nth-child(2) { transition-delay: 0.1s; }
.method-grid [data-animate="fade-up"]:nth-child(3) { transition-delay: 0.2s; }

.features-list [data-animate="fade-up"]:nth-child(1) { transition-delay: 0s; }
.features-list [data-animate="fade-up"]:nth-child(2) { transition-delay: 0.1s; }
.features-list [data-animate="fade-up"]:nth-child(3) { transition-delay: 0.15s; }
.features-list [data-animate="fade-up"]:nth-child(4) { transition-delay: 0.2s; }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
  :root {
    --space-3xl: 5rem;
    --space-2xl: 3rem;
  }

  .nav {
    padding: var(--space-sm) var(--space-md);
  }

  .hero {
    padding: var(--space-2xl) var(--space-md);
  }

  .hero-title .line {
    font-size: 2.5rem;
  }

  .feature-item {
    flex-direction: column;
    gap: var(--space-md);
  }

  .comparison-table {
    grid-template-columns: 1fr;
  }

  .pricing-amount .price {
    font-size: 3rem;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .hero-title .line {
    font-size: 2rem;
  }

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

  .btn-large {
    width: 100%;
    padding: 1rem 2rem;
  }
}

/* ========================================
   Legal Pages (Terms, Privacy, Legal)
   ======================================== */
.nav-legal {
  position: relative;
  background: var(--black);
}

.nav-legal .logo a {
  color: var(--white);
  text-decoration: none;
}

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

.legal-page {
  padding: var(--space-3xl) 0;
  padding-top: calc(var(--space-3xl) + 80px);
  background: var(--black);
  min-height: 100vh;
}

.legal-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--font-weight-black);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--white-muted);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.legal-intro {
  font-size: 1.125rem;
  color: var(--white-muted);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--gray);
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--accent);
}

.legal-content p {
  color: var(--white-muted);
  margin-bottom: var(--space-md);
}

.legal-content ul {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-lg);
}

.legal-content ul li {
  color: var(--white-muted);
  padding: var(--space-xs) 0;
  position: relative;
  list-style: disc;
}

.legal-content ul li strong {
  color: var(--white);
}

.legal-note {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--gray);
  font-size: 0.875rem;
  color: var(--white-subtle);
  text-align: center;
}

/* Legal Table (for 特定商取引法) */
.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-xl);
}

.legal-table tr {
  border-bottom: 1px solid var(--gray);
}

.legal-table th,
.legal-table td {
  padding: var(--space-md);
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  width: 30%;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  background: var(--gray-dark);
}

.legal-table td {
  color: var(--white-muted);
}

@media (max-width: 768px) {
  .legal-page {
    padding-top: calc(var(--space-2xl) + 60px);
  }

  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
  }

  .legal-table th {
    padding-bottom: var(--space-xs);
  }

  .legal-table td {
    padding-top: 0;
    padding-bottom: var(--space-md);
  }
}