*{margin:0;padding:0;box-sizing:border-box}
:root{
  --black:#0D0D0D;
  --dark:#1A1A1A;
  --amber:#D4860A;
  --amber-light:#F5A623;
  --amber-pale:#FFF4E0;
  --blue:#1E4D8C;
  --blue-light:#EBF2FF;
  --cream:#F5F3EE;
  --text:#1A1A1A;
  --text-muted:#666;
  --font-display:'Oswald',sans-serif;
  --font-body:'Noto Sans JP',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--cream);color:var(--text);overflow-x:hidden}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--black);padding:14px 32px;display:flex;justify-content:space-between;align-items:center}
.nav-logo{font-family:var(--font-display);font-size:26px;font-weight:700;color:white;letter-spacing:4px}
.nav-logo span{color:var(--amber-light)}
.nav-cta{background:var(--amber);color:white;padding:10px 22px;font-size:14px;font-weight:500;text-decoration:none;letter-spacing:1px;transition:all 0.2s;font-family:var(--font-display)}
.nav-cta:hover{background:var(--amber-light)}

/* HERO */
.hero{min-height:100vh;background:var(--black);display:flex;align-items:center;padding:100px 32px 60px;position:relative;overflow:hidden}
.hero-bg-text{position:absolute;right:-40px;top:50%;transform:translateY(-50%);font-family:var(--font-display);font-size:clamp(120px,18vw,220px);font-weight:700;color:rgba(255,255,255,0.03);letter-spacing:-10px;line-height:1;pointer-events:none;user-select:none}
.hero-inner{max-width:960px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;position:relative;z-index:1}
.hero-left{}
.hero-eyebrow{font-size:12px;letter-spacing:3px;color:var(--amber-light);font-family:var(--font-display);margin-bottom:20px}
.hero h1{font-family:var(--font-display);font-size:clamp(44px,6vw,80px);font-weight:700;color:white;line-height:1.05;margin-bottom:28px;letter-spacing:2px}
.hero h1 span{color:var(--amber-light)}
.hero-sub{font-size:15px;color:rgba(255,255,255,0.65);line-height:2;margin-bottom:36px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn-amber{background:var(--amber);color:white;padding:16px 32px;font-size:15px;font-weight:500;text-decoration:none;letter-spacing:1px;font-family:var(--font-display);transition:all 0.2s}
.btn-amber:hover{background:var(--amber-light)}
.btn-outline{background:transparent;color:white;padding:16px 28px;font-size:14px;font-weight:500;text-decoration:none;border:1px solid rgba(255,255,255,0.3);letter-spacing:1px;font-family:var(--font-display);transition:all 0.2s}
.btn-outline:hover{border-color:var(--amber-light);color:var(--amber-light)}
.hero-right{}
.hero-cards{display:grid;gap:14px}
.h-card{padding:20px 24px;border-left:3px solid var(--amber);background:rgba(255,255,255,0.05)}
.h-card-label{font-size:11px;letter-spacing:3px;color:var(--amber-light);font-family:var(--font-display);margin-bottom:6px}
.h-card h3{font-size:18px;color:white;font-weight:500;margin-bottom:6px}
.h-card p{font-size:13px;color:rgba(255,255,255,0.55);line-height:1.7}

/* ABOUT */
.about{background:var(--cream);padding:80px 32px}
.inner{max-width:960px;margin:0 auto}
.text-center{text-align:center}
.label{display:inline-block;font-family:var(--font-display);font-size:11px;letter-spacing:3px;color:var(--amber);border:1px solid var(--amber);padding:5px 14px;margin-bottom:20px}
.section-title{font-family:var(--font-display);font-size:clamp(28px,4vw,44px);font-weight:700;color:var(--black);margin-bottom:16px;letter-spacing:2px;line-height:1.2}
.section-sub{font-size:15px;color:var(--text-muted);line-height:2;max-width:600px;margin:0 auto 48px}
.about-text{font-size:16px;line-height:2.2;color:var(--text);max-width:680px;margin:0 auto;text-align:left}
.about-text p{margin-bottom:20px}
.about-tagline{font-family:var(--font-display);font-size:28px;font-weight:700;color:var(--amber);text-align:center;margin-top:36px;letter-spacing:2px}

/* COURSES */
.courses{background:var(--black);padding:80px 32px}
.courses .label{border-color:var(--amber-light);color:var(--amber-light)}
.courses .section-title{color:white}
.courses .section-sub{color:rgba(255,255,255,0.6)}
.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:2px;background:rgba(255,255,255,0.1)}
.course-card{padding:40px 36px;background:var(--dark)}
.course-card.blue-accent{border-top:3px solid var(--blue-light)}
.course-card.amber-accent{border-top:3px solid var(--amber)}
.c-grade{font-size:11px;letter-spacing:3px;font-family:var(--font-display);margin-bottom:12px}
.course-card.blue-accent .c-grade{color:#7EB8FF}
.course-card.amber-accent .c-grade{color:var(--amber-light)}
.c-title{font-family:var(--font-display);font-size:26px;font-weight:700;color:white;margin-bottom:16px;letter-spacing:2px}
.c-features{list-style:none;margin-bottom:24px}
.c-features li{font-size:14px;color:rgba(255,255,255,0.7);padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.07);line-height:1.6;display:flex;gap:10px;align-items:flex-start}
.c-features li::before{content:'—';color:var(--amber-light);flex-shrink:0}
.c-price{font-family:var(--font-display);font-size:13px;color:rgba(255,255,255,0.4);letter-spacing:1px}

/* WHY */
.why{background:var(--cream);padding:80px 32px}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:rgba(0,0,0,0.08)}
.why-item{background:var(--cream);padding:36px 28px}
.why-num{font-family:var(--font-display);font-size:48px;font-weight:700;color:rgba(0,0,0,0.06);line-height:1;margin-bottom:8px}
.why-item h3{font-family:var(--font-display);font-size:20px;font-weight:600;color:var(--black);margin-bottom:12px;letter-spacing:1px}
.why-item p{font-size:14px;color:var(--text-muted);line-height:1.9}

/* MESSAGE */
.message{background:var(--amber);padding:80px 32px;text-align:center}
.message-text{font-family:var(--font-display);font-size:clamp(22px,3vw,36px);font-weight:700;color:white;line-height:1.5;max-width:720px;margin:0 auto 20px;letter-spacing:1px}
.message-sub{font-size:15px;color:rgba(255,255,255,0.85);line-height:2;max-width:560px;margin:0 auto}

/* FLOW */
.flow{background:var(--black);padding:80px 32px}
.flow .label{border-color:var(--amber-light);color:var(--amber-light)}
.flow .section-title{color:white}
.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;background:rgba(255,255,255,0.08);margin-top:40px}
.f-step{background:var(--dark);padding:28px 20px;text-align:center}
.f-num{font-family:var(--font-display);font-size:40px;font-weight:700;color:var(--amber);margin-bottom:12px;line-height:1}
.f-step h3{font-size:15px;color:white;font-weight:500;margin-bottom:8px}
.f-step p{font-size:12px;color:rgba(255,255,255,0.5);line-height:1.8}

/* CTA */
.cta{background:var(--cream);padding:80px 32px;text-align:center}
.cta h2{font-family:var(--font-display);font-size:clamp(28px,4vw,48px);font-weight:700;color:var(--black);margin-bottom:16px;letter-spacing:2px}
.cta p{font-size:15px;color:var(--text-muted);line-height:2;margin-bottom:40px}
.cta-box{background:var(--black);padding:40px;max-width:480px;margin:0 auto}
.cta-line{display:block;background:#06C755;color:white;padding:18px;font-size:16px;font-weight:700;text-decoration:none;letter-spacing:1px;font-family:var(--font-display);transition:opacity 0.2s;text-align:center}
.cta-line:hover{opacity:0.9}

/* ==============================
   CONTACT FORM — GRIT
============================== */
.gk-form-grit{
  text-align:left;
  margin-bottom:28px;
}
.gk-form-field{
  margin-bottom:16px;
}
.gk-form-field label{
  display:block;
  font-size:12px;
  letter-spacing:2px;
  color:rgba(255,255,255,0.5);
  font-family:var(--font-display);
  margin-bottom:6px;
}
.gk-required{color:var(--amber-light);margin-left:2px}
.gk-optional{font-size:11px;color:rgba(255,255,255,0.35);font-family:var(--font-body);letter-spacing:0}
.gk-form-grit input[type="text"],
.gk-form-grit textarea{
  width:100%;
  background:rgba(255,255,255,0.07);
  border:1px solid rgba(255,255,255,0.15);
  color:white;
  padding:12px 14px;
  font-size:14px;
  font-family:var(--font-body);
  border-radius:0;
  outline:none;
  transition:border-color 0.2s, background 0.2s;
  resize:vertical;
}
.gk-form-grit input[type="text"]::placeholder,
.gk-form-grit textarea::placeholder{
  color:rgba(255,255,255,0.25);
}
.gk-form-grit input[type="text"]:focus,
.gk-form-grit textarea:focus{
  border-color:var(--amber);
  background:rgba(255,255,255,0.1);
}
.gk-submit-btn{
  display:block;
  width:100%;
  background:var(--amber);
  color:white;
  border:none;
  padding:16px;
  font-size:15px;
  font-weight:500;
  font-family:var(--font-display);
  letter-spacing:2px;
  cursor:pointer;
  transition:background 0.2s;
  margin-top:4px;
}
.gk-submit-btn:hover{background:var(--amber-light)}
.gk-submit-btn:disabled{background:rgba(255,255,255,0.2);cursor:not-allowed}
.gk-form-divider{
  text-align:center;
  margin:20px 0 16px;
  position:relative;
}
.gk-form-divider::before{
  content:'';
  position:absolute;
  top:50%;left:0;right:0;
  height:1px;
  background:rgba(255,255,255,0.12);
}
.gk-form-divider span{
  position:relative;
  background:var(--dark);
  padding:0 12px;
  font-size:12px;
  color:rgba(255,255,255,0.35);
  letter-spacing:1px;
  font-family:var(--font-display);
}
.gk-form-feedback{
  padding:14px 16px;
  font-size:14px;
  line-height:1.6;
  margin-top:12px;
  text-align:center;
}
.gk-feedback-success{
  background:rgba(212,134,10,0.15);
  border:1px solid var(--amber);
  color:var(--amber-light);
}
.gk-feedback-error{
  background:rgba(220,50,50,0.12);
  border:1px solid rgba(220,50,50,0.4);
  color:#ff8080;
}

/* FOOTER */
footer{background:var(--black);padding:32px;text-align:center}
.f-logo{font-family:var(--font-display);font-size:28px;font-weight:700;color:white;letter-spacing:6px;margin-bottom:10px}
.f-logo span{color:var(--amber-light)}
footer p{color:rgba(255,255,255,0.35);font-size:12px;letter-spacing:1px}

/* ANIM */
.reveal{opacity:0;transform:translateY(20px);transition:all 0.6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

@media(max-width:720px){
  .hero-inner{grid-template-columns:1fr}
  .hero-right{display:none}
  .course-grid,.why-grid,.flow-steps{grid-template-columns:1fr}
  nav{padding:12px 16px}
}