@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap');

:root {
  --bg: #F7F6F2;
  --ink: #171717;
  --ink-muted: #5F5F5B;
  --border: #DCDCD6;
  --accent: #65705F;
  --dark: #20211F;
  --dark-text: #F7F6F2;
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --container-max: 1280px;
  --container-max-lg: 1360px;
  --pad-desktop: 48px;
  --pad-tablet: 32px;
  --pad-mobile: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--pad-desktop);
  padding-right: var(--pad-desktop);
}
@media (min-width: 1500px) { .wrap { max-width: var(--container-max-lg); padding-left: 64px; padding-right: 64px; } }
@media (max-width: 900px) { .wrap { padding-left: var(--pad-tablet); padding-right: var(--pad-tablet); } }
@media (max-width: 560px) { .wrap { padding-left: var(--pad-mobile); padding-right: var(--pad-mobile); } }

h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.03em; color: var(--ink); }
h1 { font-size: 80px; line-height: 1.0; letter-spacing: -0.04em; max-width: 780px; }
h2 { font-size: 52px; line-height: 1.08; }
h3 { font-size: 36px; line-height: 1.1; }
h4 { font-size: 22px; line-height: 1.25; }
p { color: var(--ink-muted); font-size: 18px; line-height: 1.6; max-width: 660px; margin: 0; }

@media (max-width: 900px) { h1 { font-size: 58px; } h2 { font-size: 44px; } h3 { font-size: 32px; } }
@media (max-width: 560px) { h1 { font-size: 44px; } h2 { font-size: 36px; } h3 { font-size: 28px; } p { font-size: 16px; } }

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

.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); }
.label { font-size: 13px; font-weight: 500; letter-spacing: 0.03em; color: var(--ink-muted); }

nav {
  position: sticky; top: 0; z-index: 50; height: 76px;
  display: flex; align-items: center;
  background: rgba(247,246,242,0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 250ms ease-out;
}
nav.scrolled { border-bottom-color: var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-name { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.nav-links { display: flex; gap: 32px; font-size: 15px; color: var(--ink-muted); }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 700px) { .nav-links { gap: 18px; font-size: 14px; } }

.btn { display: inline-flex; align-items: center; height: 46px; padding: 0 22px; border-radius: 999px; font-size: 15px; font-weight: 500; transition: opacity 200ms ease-out; white-space: nowrap; }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { opacity: 0.85; }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--ink); }
.btn-secondary:hover { border-color: var(--ink); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

section { padding: 80px 0; }
@media (max-width: 900px) { section { padding: 64px 0; } }
@media (max-width: 560px) { section { padding: 48px 0; } }

.section-head { margin-bottom: 56px; }
.section-head .eyebrow { display: block; margin-bottom: 14px; }
.section-head p { margin-top: 20px; }

.section-dark { background: var(--dark); color: var(--dark-text); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--dark-text); }
.section-dark p { color: #B9BAB4; }

.hero {
  padding-top: 100px; padding-bottom: 100px;
  display: grid; grid-template-columns: 1.2fr 0.8fr;
  gap: 48px; align-items: center;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; padding-top: 80px; padding-bottom: 80px; } }
.hero p.lede { margin-top: 28px; font-size: 19px; max-width: 520px; }
.hero .capability-line { margin-top: 32px; font-size: 14px; font-weight: 500; letter-spacing: 0.02em; color: var(--ink-muted); }
.hero .btn-row { margin-top: 40px; }
.hero-visual { position: relative; aspect-ratio: 4/5; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: linear-gradient(180deg,#EFEEE8 0%,#E4E3DB 100%); }
@media (max-width: 900px) { .hero-visual { display: none; } }

.tile-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
@media (max-width: 900px) { .tile-grid { grid-template-columns: repeat(2,1fr); } }
.tile { background: var(--bg); padding: 32px 28px; }
.tile .eyebrow { margin-bottom: 14px; }
.tile p { font-size: 15px; }

.case-list { display: flex; flex-direction: column; }
.case-card { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; padding: 40px 0; border-top: 1px solid var(--border); align-items: start; transition: opacity 200ms ease-out; }
.case-list .case-card:last-child { border-bottom: 1px solid var(--border); }
@media (max-width: 900px) { .case-card { grid-template-columns: 1fr; gap: 20px; padding: 32px 0; } }
.case-card .meta { display: flex; flex-direction: column; gap: 10px; }
.case-card .classification { font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); }
.case-card .platform { font-size: 13px; color: var(--ink-muted); }
.case-card h3 { margin-top: 4px; }
.case-card p.desc { margin-top: 12px; font-size: 16px; }
.case-card .kpis { display: flex; gap: 40px; margin-top: 24px; flex-wrap: wrap; }
.case-card .kpi-num { font-size: 32px; font-weight: 600; letter-spacing: -0.02em; }
.case-card .kpi-lab { font-size: 13px; color: var(--ink-muted); margin-top: 4px; }
.case-card .view-link { margin-top: 24px; display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 2px; transition: gap 200ms ease-out, color 200ms ease-out; }
.case-card:hover .view-link { gap: 14px; color: var(--accent); border-color: var(--accent); }

.platform-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px 32px; }
@media (max-width: 900px) { .platform-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px) { .platform-grid { grid-template-columns: 1fr; } }
.platform-cat { font-size: 13px; color: var(--ink-muted); margin-bottom: 8px; }
.platform-card { border-top: 1px solid var(--border); padding-top: 20px; }
.platform-card h4 { margin-bottom: 4px; }
.fluency-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.02em; color: var(--accent); margin: 10px 0 14px; }
.platform-card ul { list-style: none; margin: 0; padding: 0; font-size: 15px; color: var(--ink-muted); }
.platform-card li { padding: 5px 0; }

.work-steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 64px; }
@media (max-width: 900px) { .work-steps { grid-template-columns: repeat(2,1fr); gap: 40px 24px; } }
@media (max-width: 560px) { .work-steps { grid-template-columns: 1fr; gap: 32px; } }
.work-step { border-top: 1px solid #3A3B37; padding-top: 20px; padding-right: 24px; }
.work-step .step-num { font-size: 13px; color: #8C8D87; margin-bottom: 12px; }
.work-step h4 { margin-bottom: 10px; color: #F7F6F2; font-weight: 700; }
.work-step ul { list-style: none; margin: 0; padding: 0; font-size: 14px; color: #B9BAB4; }
.work-step li { padding: 3px 0; }
.work-statement { margin-top: 72px; font-size: 30px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.3; max-width: 640px; }

.about-grid { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } }
.about-grid p { max-width: 620px; margin-bottom: 16px; }
.training-note { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.training-note .label { display: block; margin-bottom: 10px; }
.training-note ul { list-style: none; padding: 0; margin: 0; font-size: 15px; color: var(--ink-muted); }
.training-note li { padding: 3px 0; }

footer.section-dark { padding: 80px 0 64px; }
@media (max-width: 900px) { footer.section-dark { padding: 64px 0 48px; } }
@media (max-width: 560px) { footer.section-dark { padding: 48px 0 40px; } }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 40px; }
.footer-links { display: flex; gap: 24px; font-size: 15px; }
.footer-links a { color: var(--dark-text); border-bottom: 1px solid #4A4B46; padding-bottom: 2px; }
.footer-links a:hover { border-color: var(--accent); color: var(--accent); }
.footer-name { font-size: 15px; color: #8C8D87; margin-top: 24px; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 500ms ease-out, transform 500ms ease-out; }
.reveal.in { opacity: 1; transform: translateY(0); }

.case-hero { padding-top: 150px; padding-bottom: 80px; }
.case-hero .classification { margin-bottom: 20px; }
.case-hero h1 { font-size: 60px; max-width: 900px; }
@media (max-width: 900px) { .case-hero h1 { font-size: 40px; } }
.case-hero .proposition { margin-top: 24px; font-size: 20px; max-width: 640px; }
.case-section { padding: 72px 0; border-top: 1px solid var(--border); }
.case-section-inner { display: grid; grid-template-columns: 4fr 8fr; gap: 48px; }
@media (max-width: 900px) { .case-section-inner { grid-template-columns: 1fr; gap: 20px; } }
.case-section-inner .eyebrow { padding-top: 4px; }
.case-section-inner .content > * + * { margin-top: 20px; }
.kpi-row { display: flex; gap: 56px; flex-wrap: wrap; margin-top: 32px; }
.kpi-block .kpi-num { font-size: 40px; font-weight: 600; letter-spacing: -0.02em; }
.kpi-block .kpi-lab { font-size: 14px; color: var(--ink-muted); margin-top: 6px; max-width: 180px; }
.kpi-block .kpi-tag { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; color: var(--accent); margin-top: 8px; }
.journey { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 15px; color: var(--ink-muted); margin-top: 8px; }
.journey .step { padding: 8px 16px; border: 1px solid var(--border); border-radius: 999px; color: var(--ink); font-size: 14px; }
.journey .arrow { color: var(--border); }
.optim-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; margin-top: 8px; }
@media (max-width: 900px) { .optim-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .optim-grid { grid-template-columns: 1fr; } }
.optim-block .label { display: block; margin-bottom: 10px; color: var(--accent); }
.optim-block p { font-size: 15px; }
.case-capability { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.cap-tag { font-size: 13px; padding: 7px 14px; border: 1px solid var(--border); border-radius: 999px; color: var(--ink-muted); }
.case-nav { display: flex; justify-content: space-between; padding: 48px 0 100px; }
.case-nav a { font-size: 15px; color: var(--ink-muted); }
.case-nav a:hover { color: var(--accent); }