/* TalkLab - 会話スタイル診断 LP Styles */

:root {
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --primary-light: #818CF8;
  --accent: #EC4899;
  --accent-light: #F472B6;
  --dark: #1E1B4B;
  --dark-light: #312E81;
  --gray-900: #111827;
  --gray-800: #1F2937;
  --gray-700: #374151;
  --gray-600: #4B5563;
  --gray-500: #6B7280;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;
  --white: #FFFFFF;
  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #EC4899 100%);
  --gradient-soft: linear-gradient(135deg, #818CF8 0%, #F472B6 100%);
  --gradient-light: linear-gradient(180deg, #FAFAFF 0%, #F3F4F6 100%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

/* ========================================
   Hero Section
======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #F5F3FF 0%, #FDF2F8 50%, #FFFFFF 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 6rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-tagline {
  display: inline-block;
  font-size: 0.95rem;
  color: var(--primary-dark);
  background: rgba(99, 102, 241, 0.1);
  padding: 0.6rem 1.75rem;
  border-radius: 50px;
  border: 1px solid rgba(99, 102, 241, 0.25);
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
  font-weight: 500;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--gray-600);
  margin-bottom: 2.5rem;
  line-height: 2;
}

.hero-description strong {
  color: var(--primary-dark);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--dark);
  color: var(--white);
  padding: 1rem 2rem;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 24px rgba(99, 102, 241, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
  background: var(--dark-light);
}

.cta-button svg {
  width: 20px;
  height: 20px;
}

/* ========================================
   Section Styles
======================================== */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--primary);
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  font-weight: 600;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--gray-900);
}

/* ========================================
   Problem Section (Target Users)
======================================== */
.target-users {
  background: linear-gradient(180deg, #FFFFFF 0%, #F5F3FF 50%, #FDF2F8 100%);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
}

.users-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.user-card {
  background: var(--white);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.06);
}

.user-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.15);
}

.user-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  color: var(--primary);
}

.user-card p {
  color: var(--gray-700);
  font-size: 0.95rem;
  line-height: 1.6;
}

.problem-conclusion {
  text-align: center;
  margin-top: 3rem;
  padding: 1.5rem 2rem;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.problem-conclusion strong {
  color: var(--primary-dark);
  font-size: 1.1rem;
}

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

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 24px;
  padding: 2.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px -20px rgba(99, 102, 241, 0.25);
}

.feature-card.feature-main {
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.04), rgba(236, 72, 153, 0.04));
  border-color: rgba(99, 102, 241, 0.2);
}

.feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 18px;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--gray-600);
  line-height: 1.8;
}

.feature-card strong {
  color: var(--primary-dark);
}

/* ========================================
   8 Tendencies Section
======================================== */
.tendencies {
  background: var(--dark);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
}

.tendencies .section-label {
  color: var(--primary-light);
}

.tendencies .section-header h2 {
  color: var(--white);
}

.tendencies-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.tendency-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
}

.tendency-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

.tendency-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
  background: var(--gradient-soft);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tendency-card p {
  color: var(--gray-400);
  font-size: 0.85rem;
}

/* ========================================
   Scenarios Section
======================================== */
.scenarios {
  background: linear-gradient(180deg, #FFFFFF 0%, #F5F3FF 100%);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
}

.scenarios-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.scenario-category {
  background: var(--white);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.06);
}

.scenario-category h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid rgba(99, 102, 241, 0.15);
}

.scenario-category ul {
  list-style: none;
}

.scenario-category li {
  color: var(--gray-700);
  font-size: 0.95rem;
  padding: 0.5rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.scenario-category li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--gradient-primary);
  border-radius: 50%;
}

/* ========================================
   How to Use Section
======================================== */
.how-to-use {
  overflow: visible;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 180px;
  max-width: 220px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.step-number {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin: 0 auto 1.25rem;
}

.step-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--gray-600);
  font-size: 0.85rem;
  line-height: 1.6;
}

.step-arrow {
  display: flex;
  align-items: center;
  color: var(--primary);
  padding-top: 3rem;
}

.time-note {
  text-align: center;
  margin-top: 3rem;
  color: var(--gray-600);
}

.time-note strong {
  color: var(--primary-dark);
  font-size: 1.1rem;
}

/* ========================================
   Diagnosis Types Section
======================================== */
.diagnosis-types {
  background: linear-gradient(180deg, #F5F3FF 0%, #FDF2F8 100%);
  margin: 0;
  max-width: none;
  padding: 5rem 2rem;
}

.types-grid {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.type-card {
  background: var(--white);
  border-radius: 50px;
  padding: 0.25rem;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.1);
}

.type-badge {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
}

/* ========================================
   Testimonials Section
======================================== */
.testimonials {
  background: var(--white);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
}

.testimonials-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.04), rgba(236, 72, 153, 0.04));
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: 24px;
  padding: 2rem;
}

.stars {
  margin-bottom: 1rem;
}

.stars span {
  color: var(--accent);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
}

.testimonial-card blockquote {
  color: var(--gray-700);
  font-size: 1rem;
  line-height: 1.8;
  font-style: normal;
  margin-bottom: 1rem;
}

.reviewer {
  color: var(--gray-500);
  font-size: 0.9rem;
}

/* ========================================
   Specs Section
======================================== */
.specs {
  background: var(--gray-50);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
}

.specs-table {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--gray-200);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.spec-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  border-bottom: 1px solid var(--gray-200);
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-label {
  padding: 1.25rem 1.5rem;
  background: rgba(99, 102, 241, 0.06);
  font-weight: 500;
  color: var(--primary-dark);
  font-size: 0.9rem;
}

.spec-value {
  padding: 1.25rem 1.5rem;
  color: var(--gray-700);
  font-size: 0.95rem;
}

/* ========================================
   Download CTA Section
======================================== */
.download {
  background: var(--gradient-primary);
  margin: 0;
  max-width: none;
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.download-content {
  position: relative;
  z-index: 1;
}

.download-content h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1rem;
}

.download-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.download-content p strong {
  color: var(--white);
}

.cta-button-large {
  padding: 1.25rem 3rem;
  font-size: 1.125rem;
  background: var(--white);
  color: var(--dark);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.cta-button-large:hover {
  background: var(--gray-50);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* ========================================
   FAQ Section
======================================== */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

.faq-item summary {
  padding: 1.5rem;
  font-weight: 500;
  color: var(--gray-900);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s ease;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: var(--gray-50);
}

.faq-item p {
  padding: 0 1.5rem 1.5rem;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ========================================
   Footer
======================================== */
.footer {
  background: var(--dark);
  padding: 3rem 2rem 2rem;
  margin-top: 0;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pixel-logo {
  font-size: 1.25rem;
  font-weight: 600;
  background: var(--gradient-soft);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-links a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--gray-500);
  font-size: 0.85rem;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 900px) {
  .hero-content {
    padding: 4rem 2rem;
  }

  .tendencies-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .step {
    max-width: 100%;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 1rem 0;
  }

  .spec-row {
    grid-template-columns: 1fr;
  }

  .spec-label {
    border-bottom: 1px solid var(--gray-200);
  }
}

@media (max-width: 600px) {
  section {
    padding: 4rem 1.5rem;
  }

  .hero-content {
    padding: 3rem 1.5rem;
  }

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

  .feature-card {
    padding: 2rem;
  }

  .tendencies-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .tendency-card {
    padding: 1.25rem 1rem;
  }

  .users-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .user-card {
    padding: 1.5rem 1rem;
  }

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

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

  .types-grid {
    gap: 0.75rem;
  }

  .type-badge {
    padding: 0.6rem 1.25rem;
    font-size: 0.85rem;
  }

  .cta-button-large {
    padding: 1rem 2rem;
  }
}

/* ========================================
   Animations
======================================== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.hero-tagline {
  animation: pulse 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.feature-card.feature-main:hover {
  animation: float 2s ease-in-out;
}