/* ─── 5KAIZEN · Horizon Design System ─────────────────────── */
:root{
  --bg:#131313;--surface-dim:#0E0E0E;--surface-low:#1C1B1B;--surface:#20201F;--surface-high:#2A2A2A;--surface-highest:#353535;
  --on-surface:#E5E2E1;--on-surface-variant:#D7C3B1;--outline:#9F8E7D;--outline-variant:#524436;
  --border-subtle:rgba(248,247,244,.10);--border-soft:rgba(248,247,244,.06);
  --primary:#BA7517;--primary-glow:#FFB869;--primary-deep:#673D00;--on-primary:#482900;
  --accent-muted:rgba(186,117,23,.20);--tertiary:#7DD0FF;--error:#FFB4AB;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--on-surface);font-family:'Inter',-apple-system,system-ui,sans-serif;font-size:16px;line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}

.glass{background:rgba(26,26,26,.7);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border:1px solid var(--border-subtle)}
.glass-light{background:rgba(248,247,244,.04);backdrop-filter:blur(12px);border:1px solid var(--border-subtle)}
.glow-blob{position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(186,117,23,.16) 0%,rgba(186,117,23,0) 70%);border-radius:50%;pointer-events:none;z-index:0}
.glow-blob.cool{background:radial-gradient(circle,rgba(125,208,255,.08) 0%,transparent 70%)}

.display-lg{font-family:'Manrope',sans-serif;font-weight:700;font-size:clamp(40px,6.4vw,64px);line-height:1.04;letter-spacing:-.02em;color:var(--on-surface)}
.display-md{font-family:'Manrope',sans-serif;font-weight:700;font-size:clamp(32px,5vw,48px);line-height:1.06;letter-spacing:-.018em;color:var(--on-surface)}
.headline-md{font-family:'Manrope',sans-serif;font-weight:600;font-size:clamp(26px,3.4vw,32px);line-height:1.18;letter-spacing:-.01em;color:var(--on-surface)}
.headline-sm{font-family:'Manrope',sans-serif;font-weight:600;font-size:22px;line-height:1.22;letter-spacing:-.005em;color:var(--on-surface)}
.body-lg{font-size:18px;line-height:28px;color:var(--on-surface-variant)}
.body-md{font-size:16px;line-height:24px;color:var(--on-surface-variant)}
.body-sm{font-size:14px;line-height:22px;color:var(--on-surface-variant)}
.label-caps{font-family:'JetBrains Mono',monospace;font-weight:500;font-size:11px;letter-spacing:.18em;text-transform:uppercase}
.serif-jp{font-family:'Noto Serif JP',serif}
em.accent{font-style:italic;color:var(--primary-glow);font-weight:600}
.text-primary{color:var(--primary-glow)}.text-on-variant{color:var(--on-surface-variant)}

.nav-island{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:60;width:calc(100% - 32px);max-width:1240px;display:flex;align-items:center;justify-content:space-between;padding:14px 22px;border-radius:14px}
.nav-brand{display:flex;align-items:center;gap:10px}
.nav-brand .kanji{font-family:'Noto Serif JP',serif;font-weight:600;font-size:1.5rem;color:var(--primary);line-height:1}
.nav-brand .wordmark{font-family:'Manrope',sans-serif;font-weight:800;font-size:1rem;letter-spacing:.18em;color:var(--on-surface)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-family:'Manrope',sans-serif;font-weight:600;font-size:13px;letter-spacing:.04em;color:var(--on-surface-variant);transition:color .15s;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--primary-glow)}
.nav-links a.active::after{content:'';position:absolute;left:0;right:0;bottom:-6px;height:1.5px;background:var(--primary-glow)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-right .sign-in{font-family:'Manrope',sans-serif;font-weight:600;font-size:13px;color:var(--on-surface-variant);letter-spacing:.04em}
.nav-right .sign-in:hover{color:var(--on-surface)}
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;background:transparent;border:0;cursor:pointer}
.hamburger span{display:block;width:22px;height:1.5px;background:var(--on-surface)}
@media(max-width:880px){.nav-links{display:none}.hamburger{display:flex}.nav-right .sign-in{display:none}}

.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;font-family:'JetBrains Mono',monospace;font-weight:600;font-size:11px;letter-spacing:.18em;text-transform:uppercase;padding:13px 22px;border-radius:8px;border:0;cursor:pointer;transition:box-shadow .2s,transform .15s}
.btn-primary:hover{box-shadow:0 0 30px rgba(186,117,23,.45);transform:translateY(-1px)}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:rgba(26,26,26,.7);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);color:var(--on-surface);font-family:'JetBrains Mono',monospace;font-weight:500;font-size:11px;letter-spacing:.18em;text-transform:uppercase;padding:12px 22px;border-radius:8px;cursor:pointer;transition:background .15s,border-color .15s}
.btn-ghost:hover{background:rgba(248,247,244,.06);border-color:var(--outline)}

.section{padding:120px 24px;max-width:1280px;margin:0 auto;position:relative}
.section .head{text-align:center;margin-bottom:60px;position:relative;z-index:2}
.section .head .kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:20px;background:var(--accent-muted);color:var(--primary-glow);margin-bottom:20px}
.section .head .lede{max-width:640px;margin:18px auto 0}

.chip{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:30px;background:var(--accent-muted);color:var(--primary-glow)}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--primary-glow)}

.tile{border-radius:14px;padding:36px;position:relative;overflow:hidden;background:rgba(26,26,26,.6);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);display:flex;flex-direction:column;transition:border-color .25s,transform .25s}
.tile:hover{border-color:rgba(186,117,23,.35);transform:translateY(-3px)}
.tile .icon{width:48px;height:48px;border-radius:10px;background:var(--accent-muted);color:var(--primary-glow);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-family:'Noto Serif JP',serif;font-weight:700;font-size:22px}
.tile h3{font-family:'Manrope',sans-serif;font-weight:700;font-size:22px;color:var(--on-surface);margin-bottom:12px;letter-spacing:-.01em}
.tile p{font-size:15px;line-height:1.65;color:var(--on-surface-variant);margin-bottom:18px}
.tile .explore{margin-top:auto;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--primary-glow);display:inline-flex;align-items:center;gap:8px}
.tile .pattern{position:absolute;inset:0;background-image:linear-gradient(rgba(248,247,244,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(248,247,244,.025) 1px,transparent 1px);background-size:32px 32px;pointer-events:none;opacity:.7}

.faq-item{background:rgba(26,26,26,.6);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:10px;margin-bottom:10px;overflow:hidden;transition:border-color .15s}
.faq-item:hover{border-color:rgba(186,117,23,.3)}
.faq-item summary{list-style:none;padding:22px 26px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;font-family:'Manrope',sans-serif;font-weight:600;font-size:15px;color:var(--on-surface)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';color:var(--primary-glow);font-family:'Inter',sans-serif;font-size:24px;font-weight:300;line-height:1;transition:transform .2s}
.faq-item[open] summary::after{content:'−'}
.faq-item .answer{padding:0 26px 22px;font-size:14px;line-height:1.7;color:var(--on-surface-variant)}

.form-field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.form-field label{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--on-surface-variant)}
.form-field input,.form-field textarea,.form-field select{background:rgba(26,26,26,.7);border:1px solid var(--border-subtle);border-radius:8px;padding:14px 16px;font-family:'Inter',sans-serif;font-size:15px;color:var(--on-surface);transition:border-color .15s,background .15s}
.form-field input:focus,.form-field textarea:focus,.form-field select:focus{outline:none;border-color:var(--primary);background:rgba(26,26,26,.9)}
.form-field textarea{min-height:120px;resize:vertical;font-family:'Inter',sans-serif}

footer{padding:60px 24px 40px;background:var(--surface-dim);border-top:1px solid var(--border-subtle);margin-top:80px}
.footer-inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:50px;align-items:flex-start}
@media(max-width:760px){.footer-inner{grid-template-columns:1fr;gap:30px}}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand .row{display:flex;align-items:center;gap:10px}
.footer-brand .kanji{font-family:'Noto Serif JP',serif;font-weight:600;font-size:1.5rem;color:var(--primary);line-height:1}
.footer-brand .wordmark{font-family:'Manrope',sans-serif;font-weight:800;font-size:1.05rem;letter-spacing:.18em;color:var(--on-surface)}
.footer-brand .tag{font-family:'Inter',sans-serif;font-size:14px;color:var(--on-surface-variant);line-height:1.6;max-width:280px}
footer h4{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--primary-glow);margin-bottom:18px;font-weight:600}
footer ul{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px}
footer ul li a{color:var(--on-surface-variant);transition:color .15s}
footer ul li a:hover{color:var(--primary-glow)}
.copy-band{max-width:1280px;margin:50px auto 0;padding-top:24px;border-top:1px solid var(--border-soft);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--outline)}

.page-hero{position:relative;padding:160px 24px 80px;text-align:center;overflow:hidden}
.page-hero .inner{position:relative;z-index:2;max-width:880px;margin:0 auto}
.page-hero .chip{margin-bottom:24px}
.page-hero h1{font-family:'Manrope',sans-serif;font-weight:700;font-size:clamp(36px,5.4vw,56px);line-height:1.05;letter-spacing:-.02em;color:var(--on-surface);margin-bottom:24px}
.page-hero h1 em{font-style:italic;color:var(--primary-glow);font-weight:600}
.page-hero .lede{max-width:640px;margin:0 auto 36px}
.page-hero .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Mobile nav open state (toggled by js/site.js) */
@media(max-width:880px){
  .nav-island.nav-open .nav-links{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:rgba(14,14,14,.98);backdrop-filter:blur(14px);border:1px solid var(--border-subtle);border-top:0;border-radius:0 0 14px 14px;padding:10px 0;z-index:90}
  .nav-island.nav-open .nav-links a{display:block;padding:14px 24px;border-bottom:1px solid var(--border-soft)}
  .nav-island.nav-open .nav-links a:last-child{border-bottom:0}
  .nav-island.nav-open .hamburger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  .nav-island.nav-open .hamburger span:nth-child(2){opacity:0}
  .nav-island.nav-open .hamburger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
  .hamburger span{transition:transform .25s,opacity .2s}
  .nav-island{position:relative}
}