:root {
  --color-bg: #ffffff;
  --color-surface: #f7f8fa;
  --color-surface-muted: #edf1f6;
  --color-border: #e4e7ec;
  --color-text: #111827;
  --color-text-muted: #4b5563;
  --color-text-inverse: #ffffff;
  --color-primary: #2d5deb;
  --color-primary-hover: #244cc0;
  --color-success: #14b8a6;
  --color-warning: #fbbf24;
  --color-danger: #ef4444;
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 40px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-soft: 0 4px 12px rgba(17, 24, 39, 0.08);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.6;
}

.notice-bar {
  background: rgba(239, 68, 68, 0.08);
  color: var(--color-danger);
  padding: 8px var(--space-md);
  text-align: center;
  font-size: 14px;
}

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

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

.container {
  width: min(1200px, 100%);
  padding: 0 var(--space-md);
  margin: 0 auto;
}

.section {
  padding: var(--space-2xl) 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 700;
  font-size: 18px;
}

.brand-logo {
  height: 56px;
  width: auto;
}

.header-links {
  display: flex;
  gap: var(--space-md);
  font-size: 14px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 18px;
  cursor: pointer;
}

.link-button {
  background: transparent;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0;
}

.hero {
  background: linear-gradient(135deg, #edf1f6 0%, #ffffff 70%);
}

.hero-grid {
  display: grid;
  gap: var(--space-xl);
}

.hero-copy h1 {
  font-size: 24px;
  line-height: 1.5;
  margin: var(--space-sm) 0;
}

.eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

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

.cta-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  width: 100%;
}

.free-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.12);
  color: var(--color-success);
  font-weight: 700;
  font-size: 14px;
  margin-top: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 700;
  text-align: center;
  min-height: 44px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-ghost {
  background: var(--color-surface-muted);
  color: var(--color-text);
  border-color: var(--color-surface-muted);
}

.word-btn {
  gap: var(--space-xs);
}

.word-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  background: #185abd;
  color: #ffffff;
  font-weight: 700;
  font-size: 14px;
}

.hero-visual,
.flow-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual dotlottie-player {
  width: min(440px, 100%);
  height: 380px;
}

.visual-placeholder {
  width: 100%;
  max-width: 360px;
  height: 360px;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-weight: 700;
}

.visual-placeholder.tall {
  height: 640px;
  max-width: 320px;
}

.problems h2,
.features h2,
.flow h2,
.trust h2,
.faq h2 {
  margin-bottom: var(--space-lg);
  font-size: 20px;
}

.card-list {
  display: grid;
  gap: var(--space-md);
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
}

.feature-grid {
  display: grid;
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: grid;
  gap: var(--space-sm);
  box-shadow: var(--shadow-soft);
}

.illustration {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-weight: 700;
}

.illustration img,
.visual-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.feature-media {
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
  border-radius: 18px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 10px 22px rgba(17, 24, 39, 0.12);
}

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

.phone-frame {
  position: relative;
  background: linear-gradient(145deg, #d7dce7, #eef1f7);
  box-shadow: 0 8px 20px rgba(17, 24, 39, 0.12);
  padding: 10px;
  border-radius: 24px;
  overflow: hidden;
}

.phone-frame.dark {
  background: linear-gradient(145deg, #111827, #1f2937);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

.phone-frame::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 6px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.08);
}

.flow-grid {
  display: grid;
  gap: var(--space-lg);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-md);
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-sm);
  align-items: center;
}

.step-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.trust .pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  background: var(--color-surface-muted);
  color: var(--color-text);
  font-weight: 700;
}

.muted {
  color: var(--color-text-muted);
}

.faq details {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.footer-cta {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-md) 0;
}

.footer-cta.compact {
  padding: 16px 0;
}

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

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  z-index: 50;
}

.modal[aria-hidden="false"] {
  display: flex;
}

.modal-dialog {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  max-width: 640px;
  width: 100%;
  padding: var(--space-lg);
  position: relative;
}

.modal-close {
  position: absolute;
  top: var(--space-xs);
  right: var(--space-xs);
  background: transparent;
  border: none;
  font-size: 20px;
  cursor: pointer;
}

.modal-body {
  color: var(--color-text);
  max-height: 60vh;
  overflow-y: auto;
  line-height: 1.7;
}

/* Responsive */
@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

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

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

  .flow-grid {
    grid-template-columns: 1fr 0.9fr;
    align-items: center;
  }

  .footer-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }

  .cta-stack {
    max-width: 360px;
  }
}

@media (max-width: 767px) {
  .header-links {
    display: none;
    position: absolute;
    top: 56px;
    right: 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: var(--space-md);
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 20;
  }

  .hero-copy h1 {
    font-size: 22px;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .header-links.open {
    display: flex;
  }
}