/* ===== Variables ===== */
:root {
  --color-primary: #5B5BF6;
  --color-primary-dark: #3F3FD1;
  --color-accent: #00D9C0;
  --color-bg: #FAFAFF;
  --color-bg-alt: #F1F0FF;
  --color-dark: #15142B;
  --color-text: #2B2A45;
  --color-text-light: #6E6C8C;
  --color-white: #FFFFFF;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 20px 40px -20px rgba(43, 42, 69, 0.25);
  --shadow-card: 0 10px 30px -12px rgba(43, 42, 69, 0.18);
  --max-width: 1140px;
  --font-main: "Noto Sans JP", "Hiragino Sans", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  overflow-x: hidden;
}

img, video { max-width: 100%; display: block; }

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

ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.mobile-br { display: none; }

@media (max-width: 640px) {
  .mobile-br { display: inline; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 999px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #8686FF);
  color: var(--color-white);
  box-shadow: 0 12px 24px -8px rgba(91, 91, 246, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 28px -8px rgba(91, 91, 246, 0.65); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 2px solid rgba(43,42,69,0.15);
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: var(--color-white); }

.btn-small { padding: 10px 20px; font-size: 14px; }
.btn-large { padding: 16px 32px; font-size: 16px; }
.btn-xl { padding: 20px 48px; font-size: 18px; }
.btn-full { width: 100%; padding: 16px; font-size: 16px; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(250, 250, 255, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(43,42,69,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 20px;
  font-weight: 900;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}
.logo span { color: var(--color-primary); }

.nav-desktop {
  display: flex;
  gap: 32px;
  font-weight: 500;
  font-size: 15px;
  color: var(--color-text-light);
}
.nav-desktop a:hover { color: var(--color-primary); }

@media (max-width: 860px) {
  .nav-desktop { display: none; }
}

/* ===== Section common ===== */
section { padding: 100px 0; position: relative; }

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

section h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  margin-bottom: 20px;
}

.section-lead {
  font-size: 17px;
  color: var(--color-text-light);
  max-width: 600px;
  margin-bottom: 48px;
}

/* ===== 1. Hero ===== */
.hero {
  padding-top: 160px;
  padding-bottom: 100px;
  background:
    radial-gradient(circle at 15% 20%, rgba(91,91,246,0.12), transparent 50%),
    radial-gradient(circle at 85% 0%, rgba(0,217,192,0.12), transparent 50%),
    var(--color-bg);
}

.hero-inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--color-dark);
  line-height: 1.3;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 17px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
}

.hero-note {
  font-size: 13px;
  color: var(--color-text-light);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-blob {
  position: absolute;
  width: 360px;
  height: 360px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  filter: blur(60px);
  opacity: 0.25;
  border-radius: 50%;
  z-index: 0;
}

.browser-mock {
  position: relative;
  z-index: 1;
  width: 100%;
  background: var(--color-white);
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 16px;
  background: var(--color-bg-alt);
}

.browser-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.browser-dot-red { background: #FF5F57; }
.browser-dot-yellow { background: #FEBC2E; }
.browser-dot-green { background: #28C840; }

.browser-screenshot {
  width: 100%;
  display: block;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { margin-top: 24px; }
}

/* ===== 2. Problem ===== */
.problem { background: var(--color-white); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 32px 28px;
}

.problem-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-dark);
}

.problem-card p {
  font-size: 14.5px;
  color: var(--color-text-light);
}

@media (max-width: 860px) {
  .problem-grid { grid-template-columns: 1fr; }
}

/* ===== 3. Demo ===== */
.demo { background: var(--color-bg); text-align: center; }
.demo .section-lead { margin-left: auto; margin-right: auto; }

.video-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.video-wrap .browser-mock {
  box-shadow: var(--shadow-soft);
}

.demo-video {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
  background: var(--color-dark);
}

.video-caption {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-light);
}

/* ===== 4. Usecase ===== */
.usecase { background: var(--color-white); }

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.usecase-card {
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  background: var(--color-white);
  transition: transform .2s ease;
}
.usecase-card:hover { transform: translateY(-6px); }

.usecase-img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 20px;
}
.usecase-img svg { width: 26px; height: 26px; }

.usecase-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-dark);
}

.usecase-card p {
  font-size: 14.5px;
  color: var(--color-text-light);
}

@media (max-width: 860px) {
  .usecase-grid { grid-template-columns: 1fr; }
}

/* ===== 5. Features ===== */
.features { background: var(--color-bg); }

.features-list {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.feature-row {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 40px;
  align-items: start;
}

.feature-row-reverse {
  grid-template-columns: 1fr 420px;
}
.feature-row-reverse .feature-visual { order: 2; }
.feature-row-reverse .feature-text { order: 1; }

.feature-visual {
  width: 420px;
  height: 315px;
  overflow: hidden;
}

.feature-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.feature-visual-placeholder {
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  border: 2px dashed rgba(43,42,69,0.25);
  background: var(--color-bg-alt);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--color-text-light);
}

.feature-visual-placeholder svg {
  width: 60px;
  height: 60px;
}

.feature-visual-label {
  font-size: 15px;
  font-weight: 700;
}

.feature-text h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 14px;
}

.feature-text p {
  font-size: 15.5px;
  color: var(--color-text-light);
}

@media (max-width: 760px) {
  .feature-row, .feature-row-reverse { grid-template-columns: 1fr; }
  .feature-visual { margin: 0 auto; }
  .feature-row-reverse .feature-visual, .feature-row-reverse .feature-text { order: initial; }
}

/* ===== 6. Pricing ===== */
.pricing { background: var(--color-white); text-align: center; }
.pricing .section-lead { margin-left: auto; margin-right: auto; margin-bottom: 16px; }

.pricing-note {
  font-size: 13.5px;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto 48px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  text-align: left;
  max-width: 820px;
  margin: 0 auto;
}

.pricing-card {
  border: 1px solid rgba(43,42,69,0.1);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
}

.pricing-card-highlight {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-soft);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 32px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
}

.pricing-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.pricing-price {
  font-size: 32px;
  font-weight: 900;
  color: var(--color-dark);
  margin-bottom: 6px;
}
.pricing-price span { font-size: 14px; font-weight: 500; color: var(--color-text-light); }

.pricing-term {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.pricing-features-note {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.pricing-features-note span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  line-height: 1;
}

.pricing-card-highlight .pricing-features {
  border-top: 1px solid rgba(43,42,69,0.1);
  padding-top: 20px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.pricing-features li {
  font-size: 14.5px;
  color: var(--color-text);
  padding-left: 24px;
  position: relative;
}
.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

@media (max-width: 760px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* ===== 7. Final CTA ===== */
.cta-final {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary) 60%, #7A7AFF);
  text-align: center;
  color: var(--color-white);
}

.cta-final-inner h2 {
  color: var(--color-white);
}

.cta-final-inner p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta-final .btn-primary {
  background: var(--color-white);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-soft);
}

.cta-note {
  margin-top: 20px;
  font-size: 13px;
  opacity: 0.8;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.logo-footer { color: var(--color-white); }
.logo-footer span { color: var(--color-accent); }

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 14px;
}
.footer-nav a:hover { color: var(--color-white); }

.footer-copy { font-size: 12.5px; opacity: 0.6; }

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}