/* ============================================================
   Cloudbase AI LP — Stylesheet
   ============================================================ */

/* ── CSS Variables ── */
:root {
  /* Brand palette */
  --cb-orange:       #FF6600;
  --cb-orange-hover: #e85d00;
  --cb-orange-light: rgba(255,102,0,.08);

  --cb-dark:         var(--cb-gray-900);
  --cb-gray-950:     #0a0a0a;
  --cb-gray-900:     #171717;
  --cb-gray-800:     #262626;
  --cb-gray-700:     #404040;
  --cb-gray-600:     #525252;
  --cb-gray-500:     #737373;
  --cb-gray-400:     #a1a1a1;
  --cb-gray-300:     #d4d4d4;
  --cb-gray-200:     #e5e5e5;
  --cb-gray-100:     #f5f5f5;
  --cb-gray-50:      #fafafa;
  --cb-white:        #ffffff;

  --font:     system-ui, -apple-system, sans-serif;
  --max-w:    1200px;
  --px:       48px;
  --radius-xs:  2px;
  --radius-sm:  4px;
  --radius-md:  6px;
  --radius-lg:  8px;
  --radius-xl:  12px;
  --radius-2xl: 16px;
  --radius-3xl: 24px;
  --radius-4xl: 32px;
  --radius-full: calc(infinity * 1px);
}

/* ── Reset ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--cb-white);
  color: var(--cb-gray-800);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Container border lines ── */
@media (min-width: 1200px) {
  body::before,
  body::after {
    content: '';
    position: fixed;
    top: 0; bottom: 0;
    width: 1px;
    background: var(--cb-gray-200);
    pointer-events: none;
    z-index: 50;
  }
  body::before { left: calc(50% - 600px); }
  body::after  { right: calc(50% - 600px); }
  .nav-inner {
    border-left: 1px solid var(--cb-gray-200);
    border-right: 1px solid var(--cb-gray-200);
  }
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.anim { animation: fadeUp .6s ease-out both; }
.d2 { animation-delay: .16s; }
.d4 { animation-delay: .32s; }

/* Scroll-triggered */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease-out, transform .6s ease-out;
}
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--cb-white);
  border-bottom: 1px solid var(--cb-gray-200);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
}
.nav-logo-img { height: 32px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--cb-gray-600);
  text-decoration: none;
  transition: color .2s;
}
.nav-link:hover { color: var(--cb-gray-800); }


/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all .2s;
  border: none;
}

.btn-orange {
  background: var(--cb-orange);
  color: var(--cb-white);
  padding: 10px 20px;
  font-size: 14px;
}
.btn-orange:hover {
  background: var(--cb-orange-hover);
}

.btn-orange-lg {
  background: var(--cb-orange);
  color: var(--cb-white);
  padding: 16px 32px;
  font-size: 16px;
}
.btn-orange-lg:hover {
  background: var(--cb-orange-hover);
}


/* ── Section dividers ── */
section + section {
  border-top: 1px solid var(--cb-gray-200);
}

/* ============================================================
   Section base
   ============================================================ */
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px var(--px);
}
.section-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 96px var(--px) 32px;
}
.section-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8px;
  background: var(--cb-gray-100);
}
.section-label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.2px;
  margin-bottom: 16px;
}
.section-heading {
  font-size: 36px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.2px;
}


/* ============================================================
   Hero
   ============================================================ */
.hero {
  background: var(--cb-white);
  color: var(--cb-gray-800);
  position: relative;
  overflow: hidden;
}

/* inner wrapper */
.hero .section-inner {
  padding-top: 72px;
  padding-bottom: 0;
  position: relative;
  z-index: 1;
}

/* ── Top: 2-column text area ── */
.hero-text {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  padding-bottom: 64px;
}

.hero h1 {
  font-size: 64px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.5px;
  color: var(--cb-gray-800);
}
.hero h1 span { color: var(--cb-orange); }

/* right column */
.hero-right {
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.hero-sub {
  font-size: 18px;
  font-weight: 400;
  color: var(--cb-gray-600);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 36px;
}

/* ── Bottom: large product mockup ── */
.hero-mockup {
  position: relative;
  margin: 0 -40px;
  margin-bottom: 8px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background-color: var(--cb-gray-100);
  background-image: radial-gradient(var(--cb-gray-300) 1px, transparent 1px);
  background-size: 20px 20px;
  padding: 48px 48px 0;
}

/* dashboard inside the mockup */
.hm-dashboard {
  line-height: 0;
}
.hm-screenshot {
  width: 100%;
  height: auto;
  display: block;
}


/* ============================================================
   Overview (Cloudbase AIとは)
   ============================================================ */
.overview { background: var(--cb-white); }
.overview .section-label { color: var(--cb-orange); }

.overview .section-content {
  padding: 8px;
}
.overview-diagram {
  background: var(--cb-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--cb-gray-200);
  overflow: hidden;
}
.overview .section-content {
  background: var(--cb-gray-100);
  border-radius: 0;
}
.overview-diagram-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background-color: var(--cb-gray-50);
  background-image: radial-gradient(var(--cb-gray-300) 1px, transparent 1px);
  background-size: 20px 20px;
}
.overview-diagram-img {
  width: 100%;
  height: auto;
  display: block;
}


/* ── Challenges (overview内) ── */
.overview-challenges {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8px;
  padding-top: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.overview-challenges-header {
  grid-column: 1 / -1;
  padding: 48px 40px 24px;
}
.overview-challenges-heading {
  font-size: 28px;
  font-weight: 600;
  color: var(--cb-gray-800);
  line-height: 1.4;
  margin-bottom: 12px;
}
.overview-challenges-lead {
  font-size: 16px;
  font-weight: 400;
  color: var(--cb-gray-600);
  line-height: 1.7;
}

.challenge-card {
  background: var(--cb-white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--cb-gray-200);
  padding: 1px;
  display: flex;
  flex-direction: column;
}

.challenge-bubble {
  background: var(--cb-gray-900);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin: 24px 28px 0;
  position: relative;
}
.challenge-bubble p {
  font-size: 18px;
  font-weight: 600;
  color: var(--cb-white);
  line-height: 1.5;
}
.challenge-bubble-arrow {
  position: absolute;
  bottom: -10px;
  left: 20px;
  width: 0;
  height: 0;
  border-left: 9px solid transparent;
  border-right: 9px solid transparent;
  border-top: 10px solid var(--cb-gray-900);
}

.challenge-solution {
  padding: 0 28px;
  margin-top: 28px;
  margin-bottom: 8px;
}
.challenge-solution p {
  font-size: 18px;
  font-weight: 600;
  color: var(--cb-orange);
  line-height: 1.5;
}

.challenge-desc {
  padding: 0 28px 28px;
}
.challenge-desc p {
  font-size: 16px;
  color: var(--cb-gray-600);
  line-height: 1.5;
}

/* ── Heading: bold + light mix ── */
.heading-bold {
  font-weight: 600;
  color: var(--cb-gray-800);
}
.heading-light {
  display: block;
  font-weight: 400;
  color: var(--cb-gray-500);
  margin-top: 8px;
}


/* ============================================================
   Features
   ============================================================ */
.features { background: var(--cb-white); }
.features .section-label { color: var(--cb-orange); }

.features .section-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-row {
  display: flex;
  gap: 0;
  align-items: stretch;
  padding: 8px;
  background: var(--cb-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--cb-gray-200);
}
.feature-row--reverse { flex-direction: row-reverse; }

.feature-text {
  flex: 1;
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.feature-num {
  font-size: 14px;
  font-weight: 600;
  color: var(--cb-gray-400);
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.feature-title {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -.2px;
  margin-bottom: 16px;
}
.feature-desc {
  font-size: 16px;
  font-weight: 400;
  color: var(--cb-gray-600);
  line-height: 1.7;
}

.feature-visual {
  flex: 1;
  background: var(--cb-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.feature-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.mock-placeholder {
  padding: 20px;
  color: var(--cb-gray-400);
  font-size: 12px;
  text-align: center;
}


/* ============================================================
   UX Section
   ============================================================ */
.ux {
  background: var(--cb-white);
  color: var(--cb-gray-800);
}
.ux .section-label { color: var(--cb-orange); }

.ux .section-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.ux-card {
  background: var(--cb-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--cb-gray-200);
  overflow: hidden;
}
.ux-card-body {
  padding: 28px 28px 24px;
  flex: 1;
}
.ux-card-num {
  font-size: 14px;
  font-weight: 600;
  color: var(--cb-gray-400);
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.ux-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--cb-gray-800);
}
.ux-card-desc {
  font-size: 16px;
  color: var(--cb-gray-600);
  line-height: 1.75;
}
.ux-card-img {
  padding: 4px;
  margin-top: auto;
}
.ux-card-img-inner {
  aspect-ratio: 16 / 9;
  background: var(--cb-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ux-card-img-src {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.masked-tag {
  display: inline-block;
  background: var(--cb-gray-200);
  border-radius: 3px;
  padding: 0 5px;
  font-size: 10px;
  font-weight: 600;
  color: var(--cb-gray-600);
}
.ux-toast {
  display: inline-block;
  background: rgba(255,102,0,.08);
  border: 1px solid rgba(255,102,0,.2);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 10px;
  color: var(--cb-orange);
  margin-top: 10px;
}


/* ============================================================
   Mid CTA
   ============================================================ */
.mid-cta { background: var(--cb-white); }
.mid-cta .section-inner {
  padding: 8px;
}


/* ============================================================
   Steps
   ============================================================ */
.steps-section { background: var(--cb-white); }
.steps-section .section-label { color: var(--cb-orange); }

.steps-section .section-content {
  display: flex;
  gap: 8px;
}
.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--cb-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--cb-gray-200);
  padding: 40px 24px;
}
.step-num {
  width: 44px; height: 44px;
  border: 2px solid var(--cb-gray-200);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--cb-gray-600);
  margin-bottom: 18px;
}
.step-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-desc {
  font-size: 16px;
  color: var(--cb-gray-600);
  line-height: 1.65;
  max-width: 260px;
}


/* ============================================================
   Final CTA
   ============================================================ */
.final-cta { background: var(--cb-white); }
.final-cta .section-inner {
  padding: 8px;
}

/* ── Shared CTA card ── */
.cta-card {
  background: var(--cb-dark);
  border-radius: var(--radius-2xl);
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card .section-label {
  color: rgba(255,255,255,.35);
  margin-bottom: 24px;
}
.cta-card-heading {
  font-size: 36px;
  font-weight: 600;
  color: var(--cb-white);
  line-height: 1.3;
  letter-spacing: -.3px;
  margin-bottom: 16px;
}
.cta-card-sub {
  font-size: 16px;
  color: var(--cb-white);
  line-height: 1.75;
  margin-bottom: 36px;
}


/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--cb-white);
  border-top: 1px solid var(--cb-gray-200);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 64px var(--px);
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.footer-isms {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--cb-gray-200);
}
.isms-badge {
  height: 80px;
  width: auto;
  flex-shrink: 0;
}
.isms-text {
  font-size: 14px;
  color: var(--cb-gray-600);
  line-height: 1.75;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.footer-logo-img { height: 32px; width: auto; }
.footer-links {
  display: flex;
  gap: 28px;
}
.footer-links a {
  font-size: 13px;
  color: var(--cb-gray-500);
  text-decoration: none;
  transition: color .2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.footer-links a:hover { color: var(--cb-gray-800); }
.icon-external {
  width: 12px;
  height: 12px;
  stroke: currentColor;
  flex-shrink: 0;
}
.footer-copy {
  font-size: 12px;
  color: var(--cb-gray-400);
}
.footer-trademarks {
  padding-top: 24px;
}
.footer-trademarks p {
  font-size: 12px;
  color: var(--cb-gray-400);
  line-height: 1.8;
}


/* ============================================================
   Contact Page
   ============================================================ */
.contact-page {
  background: var(--cb-white);
  min-height: calc(100vh - 64px - 200px);
}
.contact-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px var(--px) 96px;
}
.contact-header {
  text-align: center;
  margin-bottom: 48px;
}
.contact-heading {
  font-size: 36px;
  font-weight: 600;
  color: var(--cb-gray-800);
  margin-bottom: 16px;
}
.contact-sub {
  font-size: 16px;
  color: var(--cb-gray-600);
  line-height: 1.75;
}
.contact-form-wrap {
  background: var(--cb-white);
  border: 1px solid var(--cb-gray-200);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}
.contact-iframe {
  width: 100%;
  min-height: 800px;
  display: block;
}


/* ============================================================
   Responsive
   ============================================================ */
/* ── Mid desktop (1200px以下) ── */
@media (max-width: 1200px) and (min-width: 961px) {
  .hero h1 { font-size: 48px; }
}

/* ── Tablet (960px以下) ── */
@media (max-width: 960px) {
  :root { --px: 24px; }

  /* Nav */
  .nav-links { display: none; }
  .nav-inner { height: 56px; }
  .nav-cta { font-size: 13px; padding: 8px 16px; }

  /* Hero */
  .hero h1 { font-size: 48px; }
  .hero-text { grid-template-columns: 1fr; gap: 24px; }
  .hero-right { padding-top: 0; }
  .hero-mockup { margin: 0 -16px; padding: 20px 20px 0; }

  /* Section base */
  .section-inner { padding: 64px var(--px); }
  .section-header { padding: 64px var(--px) 32px; }
  .section-heading { font-size: 28px; }

  /* Overview challenges */
  .overview-challenges { grid-template-columns: 1fr; }
  .overview-challenges-header { padding: 32px 24px 16px; }
  .overview-challenges-heading { font-size: 22px; }

  /* Features */
  .feature-row,
  .feature-row--reverse { flex-direction: column; }
  .feature-text { padding: 32px; }
  .feature-title { font-size: 22px; }
  .feature-visual { min-height: 200px; }

  /* UX */
  .ux .section-content { grid-template-columns: 1fr; }

  /* Steps */
  .steps-section .section-content { flex-direction: column; }

  /* CTA */
  .cta-card { padding: 48px 24px; }
  .cta-card-heading { font-size: 26px; }

  /* Contact */
  .contact-inner { padding: 48px var(--px) 64px; }
  .contact-heading { font-size: 28px; }

  /* Footer */
  .footer-isms {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}

/* ── Mobile (480px以下) ── */
@media (max-width: 480px) {
  :root { --px: 16px; }

  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 15px; }
  .hero-mockup { margin: 0 -8px; padding: 12px 12px 0; border-radius: var(--radius-xl); }

  .section-heading { font-size: 22px; }
  .section-inner { padding: 48px var(--px); }
  .section-header { padding: 48px var(--px) 24px; }
  .section-content { padding: 4px; }

  .overview-challenges { padding: 4px; gap: 4px; }
  .overview-challenges-header { padding: 24px 16px 12px; }
  .challenge-bubble { margin: 16px 20px 0; padding: 12px; }
  .challenge-bubble p { font-size: 15px; }
  .challenge-solution { padding: 0 20px; margin-top: 20px; }
  .challenge-solution p { font-size: 16px; }
  .challenge-desc { padding: 0 20px 20px; }
  .challenge-desc p { font-size: 14px; }

  .feature-text { padding: 24px; }
  .feature-title { font-size: 20px; }
  .feature-desc { font-size: 14px; }

  .ux-card-body { padding: 20px 20px 16px; }
  .ux-card-title { font-size: 16px; }
  .ux-card-desc { font-size: 14px; }

  .step { padding: 28px 16px; }
  .step-title { font-size: 16px; }
  .step-desc { font-size: 14px; }

  .cta-card { padding: 40px 16px; }
  .cta-card-heading { font-size: 22px; }
  .btn-orange-lg { padding: 14px 28px; font-size: 15px; }

  .contact-inner { padding: 32px var(--px) 48px; }
  .contact-heading { font-size: 24px; }
  .contact-sub { font-size: 14px; }
  .contact-sub br { display: none; }
  .contact-header { margin-bottom: 32px; }
  .contact-iframe { min-height: 950px; }

  .footer-inner { padding: 40px var(--px); }
  .footer-links { gap: 16px; }
}