/* ============================================
   fUat Landing Page - Steel Sky Aurora theme
   ============================================ */

:root {
  /* 背景は淡 cream / off-white 系で icon と blue アクセントが映えるトーン
     (旧: #BDD4E9 / #C6CCEB / #BBD9EA の lavender Aurora → user fb 2026-05-28
     「HP 全体カラー変更」 で淡 cream に再調整) */
  --aurora-1: #FAF6ED;
  --aurora-2: #FCFAF4;
  --aurora-3: #F7F2E6;
  --primary-blue: #5490C4;
  --deep-blue: #3A72A8;
  --dark-text: #1A3E80;
  --darkest-text: #0F1E30;
  --lavender: #9298C8;
  --wordmark: #2C4E72;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-strong: rgba(252, 250, 244, 0.94);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Outfit', -apple-system, 'Segoe UI', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  color: var(--darkest-text);
  background: linear-gradient(158deg, var(--aurora-1), var(--aurora-2), var(--aurora-3));
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 60%;
  /* cream 背景に薄い peach のアクセント (旧 blue 132,165,200 → warm peach) */
  background: radial-gradient(circle, rgba(232, 200, 165, 0.16), transparent 70%);
  filter: blur(60px);
  z-index: -1;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -20%;
  right: -10%;
  width: 60%;
  height: 60%;
  /* 旧 lavender → 薄い blue 系で primary-blue と呼応 */
  background: radial-gradient(circle, rgba(132, 165, 200, 0.14), transparent 70%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

/* =====================
   Header
   ===================== */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: block;
}

.brand-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 6px;
  color: var(--wordmark);
}

.social {
  display: flex;
  gap: 18px;
}

.social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  color: var(--deep-blue);
  text-decoration: none;
  transition: all 0.25s ease;
}

.social a:hover {
  background: var(--primary-blue);
  color: #fff;
  transform: translateY(-2px);
}

/* =====================
   Hero
   ===================== */
.hero {
  text-align: center;
  padding: 28px 24px 28px;
  max-width: 760px;
  margin: 0 auto;
}

.hero-title {
  font-family: 'Outfit', 'Noto Sans JP', sans-serif;
  font-weight: 400;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.3;
  color: var(--wordmark);
  margin-bottom: 14px;
  letter-spacing: 0.12em;
}

.hero-catch {
  font-weight: 700;
  font-size: clamp(20px, 3.5vw, 30px);
  line-height: 1.65;
  color: var(--deep-blue);
  margin-bottom: 18px;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 17px);
  line-height: 2;
  color: var(--dark-text);
  max-width: 560px;
  margin: 0 auto 24px;
}

.hero-sub strong {
  color: var(--primary-blue);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-launch {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 8px 20px;
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(84, 144, 196, 0.3);
  border-radius: 999px;
  color: var(--primary-blue);
}

.hero-cta {
  display: inline-block;
  padding: 14px 32px;
  background: var(--primary-blue);
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  border-radius: 999px;
  font-size: 15px;
  transition: all 0.25s ease;
  box-shadow: 0 6px 20px rgba(84, 144, 196, 0.3);
}

.hero-cta:hover {
  background: var(--deep-blue);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(58, 114, 168, 0.4);
}

/* =====================
   App preview
   ===================== */
.app-preview {
  display: flex;
  justify-content: center;
  padding: 12px 24px 56px;
}

.phone-shell {
  width: min(330px, 86vw);
  padding: 10px;
  border-radius: 42px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.78), rgba(232, 240, 248, 0.72));
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 24px 70px rgba(58, 114, 168, 0.22);
}

.phone-screen {
  min-height: 620px;
  border-radius: 34px;
  overflow: hidden;
  background: linear-gradient(180deg, #EDF2F8 0%, #F7FAFD 42%, #FFFFFF 100%);
  color: var(--darkest-text);
}

.phone-screen--mock {
  padding: 18px;
}

.phone-screen--image {
  aspect-ratio: 390 / 844;
  min-height: 0;
  padding: 0;
}

.app-preview-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mock-statusbar,
.mock-app-header,
.mock-brand,
.mock-counts,
.mock-spot,
.mock-actions {
  display: flex;
  align-items: center;
}

.mock-statusbar {
  justify-content: space-between;
  color: rgba(15, 30, 48, 0.38);
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 24px;
}

.mock-app-header {
  justify-content: space-between;
  margin-bottom: 4px;
}

.mock-brand {
  gap: 10px;
}

.mock-brand span {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  letter-spacing: 0.22em;
  color: var(--wordmark);
}

.mock-profile {
  width: 34px;
  height: 34px;
  border-radius: 17px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary-blue), var(--deep-blue));
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(84, 144, 196, 0.28);
}

.mock-tagline {
  color: rgba(15, 30, 48, 0.42);
  font-size: 12px;
  margin-bottom: 18px;
}

.mock-counts {
  gap: 8px;
  margin-bottom: 24px;
}

.mock-counts div {
  flex: 1;
  padding: 13px 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(84, 144, 196, 0.14);
  text-align: center;
}

.mock-counts strong,
.mock-counts span {
  display: block;
}

.mock-counts strong {
  color: var(--deep-blue);
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  line-height: 1;
}

.mock-counts span {
  margin-top: 6px;
  color: rgba(15, 30, 48, 0.48);
  font-size: 11px;
}

.mock-section-label {
  margin-bottom: 10px;
  color: rgba(15, 30, 48, 0.36);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.mock-spot {
  justify-content: space-between;
  gap: 14px;
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(15, 30, 48, 0.06);
}

.mock-spot strong,
.mock-spot span {
  display: block;
}

.mock-spot strong {
  color: var(--darkest-text);
  font-size: 14px;
  margin-bottom: 3px;
}

.mock-spot span {
  color: rgba(26, 62, 128, 0.62);
  font-size: 12px;
}

.mock-avatars {
  display: flex;
}

.mock-avatars span {
  width: 24px;
  height: 24px;
  border: 2px solid #fff;
  border-radius: 12px;
  background: var(--primary-blue);
  margin-left: -7px;
}

.mock-avatars span:nth-child(2) {
  background: var(--lavender);
}

.mock-avatars span:nth-child(3) {
  background: var(--deep-blue);
}

.mock-status {
  flex-shrink: 0;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(84, 144, 196, 0.12);
  color: var(--deep-blue);
  font-size: 11px;
  font-weight: 700;
}

.mock-actions {
  gap: 10px;
  margin-top: 18px;
}

.mock-actions span {
  flex: 1;
  padding: 13px 10px;
  border-radius: 14px;
  background: rgba(84, 144, 196, 0.12);
  color: var(--deep-blue);
  text-align: center;
  font-weight: 700;
  font-size: 13px;
}

.mock-actions span:last-child {
  background: var(--deep-blue);
  color: #fff;
  box-shadow: 0 8px 18px rgba(58, 114, 168, 0.24);
}

/* =====================
   Features
   ===================== */
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px 72px;
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 24px;
  padding: 40px 32px;
  text-align: left;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(58, 114, 168, 0.12);
  background: rgba(255, 255, 255, 0.78);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary-blue), var(--deep-blue));
  color: #fff;
  margin-bottom: 20px;
  box-shadow: 0 6px 18px rgba(84, 144, 196, 0.3);
}

.feature-card h2 {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: var(--darkest-text);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--dark-text);
}

/* =====================
   Use cases
   ===================== */
.use-cases {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 8px 24px 88px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.use-cases h2 {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: clamp(22px, 3.5vw, 28px);
  color: var(--darkest-text);
  margin-bottom: 24px;
}

.use-case-list {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 680px;
  margin: 0 auto 28px;
  text-align: left;
}

.use-case-card {
  padding: 22px 24px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  color: var(--dark-text);
}

.use-case-card h3 {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.6;
  color: var(--darkest-text);
  margin-bottom: 8px;
}

.use-case-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--dark-text);
}

/* =====================
   CTA
   ===================== */
.cta {
  max-width: 760px;
  margin: 0 auto 80px;
  padding: 60px 32px;
  background: var(--glass-bg-strong);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 28px;
  text-align: center;
}

.cta h2 {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: clamp(22px, 3.5vw, 28px);
  color: var(--darkest-text);
  margin-bottom: 16px;
}

.cta p {
  font-size: 15px;
  line-height: 2;
  color: var(--dark-text);
  margin-bottom: 28px;
}

.cta-mail {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  font-size: clamp(18px, 2.5vw, 22px);
  color: var(--primary-blue);
  text-decoration: none;
  margin-bottom: 24px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.25s ease;
}

.cta-mail:hover {
  border-bottom-color: var(--primary-blue);
}

.cta-social {
  font-size: 14px;
  color: var(--dark-text);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.cta-social a {
  color: var(--deep-blue);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.cta-social a:hover {
  color: var(--primary-blue);
}

.cta-social span {
  color: var(--lavender);
}

/* =====================
   Footer
   ===================== */
.site-footer {
  text-align: center;
  padding: 32px 24px 40px;
  font-size: 13px;
  color: var(--dark-text);
  opacity: 0.7;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.02em;
}

.footer-nav {
  margin-bottom: 12px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px;
}

.footer-nav a {
  color: var(--dark-text);
  text-decoration: none;
  padding: 4px 6px;
}

.footer-nav a:hover {
  text-decoration: underline;
}

.footer-sep {
  margin: 0 2px;
  opacity: 0.5;
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 640px) {
  .site-header {
    padding: 16px 20px;
  }

  .brand-name {
    font-size: 20px;
    letter-spacing: 4px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .social {
    gap: 10px;
  }

  .social a {
    width: 34px;
    height: 34px;
  }

  .hero {
    padding: 32px 20px 44px;
  }

  .features {
    grid-template-columns: 1fr;
    padding: 20px 20px 48px;
  }

  .app-preview {
    padding: 0 20px 48px;
  }

  .feature-card {
    padding: 32px 24px;
  }

  .cta {
    padding: 48px 24px;
    margin: 0 16px 60px;
    border-radius: 20px;
  }

  .use-cases {
    padding: 0 20px 64px;
  }

  .cta-social {
    flex-direction: column;
    gap: 4px;
  }

  .cta-social span {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-cta:hover,
  .feature-card:hover,
  .social a:hover {
    transform: none;
  }
}