/* ============================================
   BRIDGE ACADEMY - juku-site-f
   Industrial Grid / Concrete + Copper
   ============================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --concrete:#3D3D3D;
  --copper:#B87333;
  --copper-light:#D4955F;
  --copper-dark:#8F5A28;
  --bg:#F0EDED;
  --surface:#FFFFFF;
  --surface-alt:#E8E4E4;
  --text:#2A2A2A;
  --muted:#6E6B6B;
  --font-en:'Barlow Condensed',sans-serif;
  --font-jp:'Noto Sans JP','Hiragino Kaku Gothic ProN',sans-serif;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --shadow-sm:0 2px 8px rgba(0,0,0,.06);
  --shadow-md:0 6px 24px rgba(0,0,0,.1);
  --shadow-lg:0 16px 48px rgba(0,0,0,.14);
  --radius:4px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-jp);background:var(--bg);color:var(--text);line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:all .3s}
ul{list-style:none}
.container{max-width:1100px;margin:0 auto;padding:0 40px}
@media(max-width:768px){.container{padding:0 20px}}

/* ========== SAMPLE BANNER ========== */
.sample-banner{
  position:fixed;top:0;left:0;right:0;
  background:var(--concrete);color:#fff;text-align:center;
  font-size:13px;padding:8px 16px;z-index:99999;
  letter-spacing:.5px;
}

/* ========== HEADER ========== */
.header{
  position:fixed;top:32px;left:0;right:0;z-index:9998;
  padding:14px 0;transition:all .3s;
}
.header.scrolled{
  background:rgba(240,237,237,.96);
  backdrop-filter:blur(16px);
  box-shadow:0 1px 0 rgba(61,61,61,.12);
  padding:10px 0;
}
.header-inner{max-width:1100px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{
  width:38px;height:38px;background:var(--concrete);color:var(--copper);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-en);font-weight:700;font-size:1.2rem;
  border-radius:var(--radius);letter-spacing:-.02em;
}
.logo-text{font-family:var(--font-en);font-size:.95rem;font-weight:700;color:var(--concrete);line-height:1.2;letter-spacing:.06em}
.logo-text small{display:block;font-weight:400;font-size:.6rem;color:var(--muted);letter-spacing:.12em;font-family:var(--font-jp)}
.nav{display:flex;align-items:center;gap:28px}
.nav-list{display:flex;gap:24px}
.nav-link{font-size:.82rem;font-weight:500;color:var(--muted);transition:color .3s;position:relative}
.nav-link::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:1px;background:var(--copper);transition:width .3s var(--ease)}
.nav-link:hover{color:var(--concrete)}
.nav-link:hover::after{width:100%}
.nav-cta{
  font-size:.82rem;font-weight:600;color:var(--surface);
  background:var(--copper);padding:10px 24px;border-radius:var(--radius);
  transition:background .3s;letter-spacing:.04em;
}
.nav-cta:hover{background:var(--copper-dark)}

.hamburger{display:none;width:28px;height:20px;background:none;border:none;cursor:pointer;position:relative;z-index:110}
.hamburger span{display:block;width:100%;height:2px;background:var(--concrete);position:absolute;left:0;transition:all .3s var(--ease)}
.hamburger span:nth-child(1){top:0}
.hamburger span:nth-child(2){top:50%;transform:translateY(-50%)}
.hamburger span:nth-child(3){bottom:0}
.hamburger.active span:nth-child(1){top:50%;transform:translateY(-50%) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){bottom:50%;transform:translateY(50%) rotate(-45deg)}
@media(max-width:840px){
  .hamburger{display:block}
  .nav{position:fixed;inset:0;background:var(--bg);flex-direction:column;align-items:center;justify-content:center;gap:24px;opacity:0;visibility:hidden;transition:all .4s var(--ease);z-index:9999}
  .nav.open{opacity:1;visibility:visible}
  .nav-list{flex-direction:column;align-items:center;gap:20px}
  .nav-link{font-size:1.1rem;color:var(--concrete)}
  .header-inner{padding:0 20px}
}

/* ========== HERO ========== */
.hero{
  min-height:100vh;display:flex;align-items:center;
  position:relative;overflow:hidden;padding:0;
}
.hero-bg{
  position:absolute;inset:0;
  background:linear-gradient(160deg,#1a1a1a 0%,#2d2d2d 40%,#3D3D3D 100%);
}
/* Grid lines overlay */
.hero-grid{
  position:absolute;inset:0;z-index:1;
  pointer-events:none;
}
.hero-grid-line{
  position:absolute;background:rgba(184,115,51,.08);
}
.hero-grid-line--v{width:1px;top:0;bottom:0}
.hero-grid-line--h{height:1px;left:0;right:0}
.hero-grid-line--v:nth-child(1){left:20%}
.hero-grid-line--v:nth-child(2){left:40%}
.hero-grid-line--v:nth-child(3){left:60%}
.hero-grid-line--v:nth-child(4){left:80%}
.hero-grid-line--h:nth-child(5){top:25%}
.hero-grid-line--h:nth-child(6){top:50%}
.hero-grid-line--h:nth-child(7){top:75%}

.hero-content{
  position:relative;z-index:2;
  max-width:1100px;margin:0 auto;width:100%;
  padding:160px 40px 100px;
}
.hero-label{
  font-family:var(--font-en);font-size:.8rem;
  color:var(--copper);letter-spacing:.2em;
  margin-bottom:20px;display:flex;align-items:center;gap:16px;
  text-transform:uppercase;font-weight:600;
}
.hero-label-line{width:40px;height:1px;background:var(--copper)}
.hero-title{
  font-size:clamp(2.2rem,5vw,3.8rem);font-weight:900;
  color:#fff;line-height:1.25;margin-bottom:16px;
  letter-spacing:.02em;
}
.hero-tagline{
  font-family:var(--font-en);font-size:clamp(1rem,2vw,1.4rem);
  color:var(--copper-light);letter-spacing:.15em;
  margin-bottom:28px;font-weight:500;
}
.hero-desc{
  font-size:.92rem;color:rgba(255,255,255,.6);
  line-height:2;max-width:520px;margin-bottom:40px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

.hero-stats{
  position:absolute;bottom:60px;right:40px;z-index:2;
  display:flex;gap:32px;
}
.hero-stat{text-align:right}
.hero-stat-num{
  font-family:var(--font-en);font-size:2.4rem;font-weight:700;
  color:var(--copper);line-height:1;
}
.hero-stat-unit{font-family:var(--font-en);font-size:.85rem;color:var(--copper-light)}
.hero-stat-label{display:block;font-size:.7rem;color:rgba(255,255,255,.4);margin-top:4px;letter-spacing:.08em}

@media(max-width:768px){
  .hero-content{padding:140px 20px 80px}
  .hero-stats{position:static;margin-top:48px;justify-content:flex-start;gap:24px}
  .hero-stat{text-align:left}
}

/* ========== BUTTONS ========== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.88rem;font-weight:600;padding:14px 32px;
  border-radius:var(--radius);transition:all .3s var(--ease);
  border:none;cursor:pointer;letter-spacing:.04em;
}
.btn--primary{background:var(--copper);color:#fff}
.btn--primary:hover{background:var(--copper-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(184,115,51,.25)}
.btn--outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.25)}
.btn--outline:hover{border-color:var(--copper);color:var(--copper)}
.btn--dark{background:var(--concrete);color:#fff}
.btn--dark:hover{background:#2a2a2a;transform:translateY(-2px)}
.btn--full{width:100%;justify-content:center}

/* ========== TRUST BAR ========== */
.trust-bar{background:var(--surface);padding:40px 0;border-bottom:1px solid rgba(61,61,61,.08)}
.trust-items{display:flex;align-items:center;justify-content:center;gap:48px}
.trust-item{text-align:center}
.trust-num{font-family:var(--font-en);font-size:2rem;font-weight:700;color:var(--copper);line-height:1}
.trust-unit{font-family:var(--font-en);font-size:.85rem;color:var(--copper)}
.trust-label{display:block;font-size:.72rem;color:var(--muted);margin-top:6px;letter-spacing:.08em}
.trust-divider{width:1px;height:36px;background:rgba(61,61,61,.1)}
@media(max-width:768px){
  .trust-items{flex-wrap:wrap;gap:20px}
  .trust-divider{display:none}
  .trust-item{width:42%}
}

/* ========== SECTIONS ========== */
.section{padding:100px 0}
.section--alt{background:var(--surface)}
.section--dark{background:var(--concrete);color:#fff}
.section-header{text-align:center;margin-bottom:56px}
.section-label{
  font-family:var(--font-en);font-size:.72rem;font-weight:600;
  letter-spacing:.2em;color:var(--copper);
  display:block;margin-bottom:10px;text-transform:uppercase;
}
.section-label--light{color:var(--copper-light)}
.section-title{
  font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;
  letter-spacing:.04em;line-height:1.4;
}
.section-title--light{color:#fff}
.section-line{width:40px;height:2px;background:var(--copper);margin:16px auto 0}
.section-sub{font-size:.88rem;color:var(--muted);margin-top:16px;max-width:560px;margin-left:auto;margin-right:auto;line-height:1.9}
.section-sub--light{color:rgba(255,255,255,.55)}

@media(max-width:768px){.section{padding:72px 0}}

/* ========== PHILOSOPHY ========== */
.philosophy-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.philosophy-text{font-size:.92rem;color:var(--muted);line-height:2.2;margin-bottom:16px}
.philosophy-right{position:relative}
.philosophy-box{
  background:var(--concrete);color:#fff;padding:40px;border-radius:var(--radius);
  position:relative;overflow:hidden;
}
.philosophy-box::before{
  content:'';position:absolute;top:0;left:0;width:3px;height:100%;
  background:var(--copper);
}
.philosophy-box-title{
  font-family:var(--font-en);font-size:.7rem;color:var(--copper);
  letter-spacing:.2em;margin-bottom:12px;text-transform:uppercase;font-weight:600;
}
.philosophy-box p{font-size:.88rem;line-height:2;color:rgba(255,255,255,.75)}
.philosophy-box strong{color:var(--copper-light);font-weight:600}
@media(max-width:840px){.philosophy-grid{grid-template-columns:1fr;gap:40px}}

/* ========== COURSES ========== */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.course-card{
  background:var(--surface);border-radius:var(--radius);
  padding:0;overflow:hidden;
  border:1px solid rgba(61,61,61,.08);
  transition:transform .4s var(--ease),box-shadow .4s;
  perspective:800px;
}
.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.course-card-top{
  background:var(--concrete);padding:28px 24px;position:relative;
}
.course-card-top::after{
  content:'';position:absolute;bottom:0;left:24px;right:24px;
  height:2px;background:var(--copper);
}
.course-num{
  font-family:var(--font-en);font-size:.65rem;color:var(--copper);
  letter-spacing:.2em;font-weight:700;text-transform:uppercase;
}
.course-card h3{font-size:1.1rem;font-weight:700;color:#fff;margin:8px 0 0}
.course-card-body{padding:24px}
.course-price{
  font-family:var(--font-en);font-size:1.6rem;font-weight:700;
  color:var(--copper);margin-bottom:4px;
}
.course-price small{font-size:.75rem;color:var(--muted);font-weight:400}
.course-desc{font-size:.84rem;color:var(--muted);line-height:1.9;margin:12px 0 16px}
.course-features{display:flex;flex-direction:column;gap:8px}
.course-features li{font-size:.82rem;color:var(--text);padding-left:18px;position:relative}
.course-features li::before{
  content:'';width:8px;height:1px;background:var(--copper);
  position:absolute;left:0;top:11px;
}
@media(max-width:840px){.course-grid{grid-template-columns:1fr}}

/* ========== TESTIMONIALS ========== */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial-card{
  background:var(--surface);border:1px solid rgba(61,61,61,.06);
  border-radius:var(--radius);padding:32px;
  transition:transform .3s var(--ease),box-shadow .3s;
}
.testimonial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.testimonial-quote{
  font-family:var(--font-en);font-size:2.5rem;color:var(--copper);
  opacity:.3;line-height:1;margin-bottom:8px;
}
.testimonial-text{font-size:.88rem;line-height:2;color:var(--text);margin-bottom:20px}
.testimonial-author{border-top:1px solid rgba(61,61,61,.08);padding-top:16px}
.testimonial-author strong{display:block;font-size:.88rem}
.testimonial-author span{font-size:.75rem;color:var(--muted)}
.testimonial-result{
  display:inline-block;font-family:var(--font-en);font-size:.7rem;
  font-weight:600;color:var(--copper);letter-spacing:.1em;
  background:rgba(184,115,51,.08);padding:3px 10px;border-radius:2px;
  margin-top:6px;
}
@media(max-width:840px){.testimonial-grid{grid-template-columns:1fr}}

/* ========== DIRECTOR ========== */
.director-layout{display:grid;grid-template-columns:280px 1fr;gap:56px;align-items:start;max-width:900px;margin:0 auto}
.director-visual{position:relative}
.director-placeholder{
  width:100%;height:360px;background:var(--concrete);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}
.director-placeholder::before{
  content:'';position:absolute;inset:0;
  background:repeating-linear-gradient(
    0deg,transparent,transparent 19px,rgba(184,115,51,.06) 19px,rgba(184,115,51,.06) 20px
  ),
  repeating-linear-gradient(
    90deg,transparent,transparent 19px,rgba(184,115,51,.06) 19px,rgba(184,115,51,.06) 20px
  );
}
.director-initials{
  font-family:var(--font-en);font-size:3rem;font-weight:700;
  color:var(--copper);opacity:.4;position:relative;z-index:1;letter-spacing:.1em;
}
.director-badge{
  position:absolute;bottom:-16px;left:-12px;
  background:var(--copper);color:#fff;padding:14px 20px;
  border-radius:var(--radius);font-size:.75rem;font-weight:600;
  letter-spacing:.04em;
}
.director-message{font-size:.92rem;color:var(--muted);line-height:2.2;margin-bottom:20px}
.director-sign{margin-top:24px}
.director-sign strong{display:block;font-size:1.15rem;letter-spacing:.06em}
.director-sign span{font-size:.78rem;color:var(--muted)}
.director-career{
  display:flex;gap:8px;flex-wrap:wrap;margin-top:8px;
}
.director-career span{
  font-size:.7rem;color:var(--copper);background:rgba(184,115,51,.08);
  padding:3px 10px;border-radius:2px;
}
@media(max-width:768px){
  .director-layout{grid-template-columns:1fr;gap:40px}
  .director-placeholder{height:240px}
}

/* ========== FLOW ========== */
.flow-timeline{max-width:700px;margin:0 auto;position:relative;padding-left:40px}
.flow-timeline::before{
  content:'';position:absolute;left:15px;top:0;bottom:0;
  width:1px;background:rgba(61,61,61,.12);
}
.flow-step{position:relative;padding:0 0 48px 32px}
.flow-step:last-child{padding-bottom:0}
.flow-step-num{
  position:absolute;left:-25px;top:0;
  width:28px;height:28px;background:var(--bg);
  border:2px solid var(--copper);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-en);font-size:.7rem;font-weight:700;color:var(--copper);
}
.flow-step.active .flow-step-num{background:var(--copper);color:#fff}
.flow-step h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.flow-step p{font-size:.84rem;color:var(--muted);line-height:1.9}

/* ========== FAQ ========== */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border-bottom:1px solid rgba(61,61,61,.08);overflow:hidden}
.faq-q{
  display:flex;align-items:center;gap:16px;
  padding:20px 0;cursor:pointer;transition:color .3s;
}
.faq-q:hover{color:var(--copper)}
.faq-q-mark{
  font-family:var(--font-en);font-weight:700;color:var(--copper);
  font-size:.95rem;min-width:28px;
}
.faq-q h3{flex:1;font-size:.92rem;font-weight:600}
.faq-icon{
  font-size:1.2rem;color:var(--copper);transition:transform .3s var(--ease);
  font-family:var(--font-en);font-weight:300;
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0}
.faq-item.open .faq-a{max-height:300px;padding:0 0 20px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a-inner{display:flex;gap:16px}
.faq-a-mark{
  font-family:var(--font-en);font-weight:700;color:var(--copper-light);
  font-size:.95rem;min-width:28px;
}
.faq-a p{font-size:.86rem;color:var(--muted);line-height:1.9}

/* ========== CONTACT ========== */
.contact-box{max-width:760px;margin:0 auto}
.contact-info{text-align:center;margin-bottom:40px}
.contact-tel{margin-bottom:8px}
.contact-tel-label{font-size:.78rem;color:var(--muted);margin-right:8px}
.contact-tel a{
  font-family:var(--font-en);font-size:2rem;font-weight:700;
  color:var(--copper);letter-spacing:.04em;
}
.contact-hours{font-size:.8rem;color:var(--muted)}
.contact-form{display:grid;gap:14px}
.contact-form input,.contact-form textarea,.contact-form select{
  width:100%;padding:14px 18px;
  border:1px solid rgba(61,61,61,.12);border-radius:var(--radius);
  font-size:.88rem;font-family:var(--font-jp);
  background:var(--surface);color:var(--text);
  transition:border-color .3s;
}
.contact-form input:focus,.contact-form textarea:focus,.contact-form select:focus{
  outline:none;border-color:var(--copper);
}

/* ========== FOOTER ========== */
.footer{background:var(--concrete);color:rgba(255,255,255,.5);padding:60px 0 28px}
.footer-inner{max-width:1100px;margin:0 auto;padding:0 40px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
.footer-brand{font-family:var(--font-en);font-size:1.1rem;font-weight:700;color:#fff;letter-spacing:.08em;margin-bottom:12px}
.footer-desc{font-size:.78rem;line-height:1.9}
.footer h4{font-size:.78rem;font-weight:600;color:var(--copper);letter-spacing:.12em;margin-bottom:14px;text-transform:uppercase}
.footer li{margin-bottom:8px}
.footer li a{font-size:.8rem;transition:color .3s}
.footer li a:hover{color:var(--copper)}
.footer-bottom{max-width:1100px;margin:40px auto 0;padding:20px 40px 0;border-top:1px solid rgba(255,255,255,.08);text-align:center;font-size:.72rem}
@media(max-width:768px){
  .footer-inner{grid-template-columns:1fr;padding:0 20px}
  .footer-bottom{padding:20px 20px 0}
}

/* ========== DIVIDER BREAK ========== */
.divider-break{
  background:var(--concrete);padding:64px 40px;text-align:center;
  position:relative;overflow:hidden;
}
.divider-break::before{
  content:'';position:absolute;inset:0;
  background:repeating-linear-gradient(
    90deg,transparent,transparent 99px,rgba(184,115,51,.06) 99px,rgba(184,115,51,.06) 100px
  );
}
.divider-text{
  position:relative;z-index:1;
  font-size:clamp(1.2rem,2.5vw,1.8rem);font-weight:700;
  color:#fff;line-height:1.6;
}
.divider-text small{display:block;font-size:.82rem;font-weight:400;color:var(--copper-light);margin-top:8px;letter-spacing:.08em}

/* ========== ANIMATIONS ========== */
[data-anim]{opacity:0;transform:translateY(30px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
[data-anim="slide-left"]{transform:translateX(-40px)}
[data-anim="slide-right"]{transform:translateX(40px)}
[data-anim].visible{opacity:1;transform:translate(0)}
[data-delay="1"]{transition-delay:.12s}
[data-delay="2"]{transition-delay:.24s}
[data-delay="3"]{transition-delay:.36s}
[data-delay="4"]{transition-delay:.48s}

/* Counter animation handled in JS */
.counter-num{font-family:var(--font-en);font-weight:700}

/* Copper underline util */
.copper-underline{
  background-image:linear-gradient(var(--copper),var(--copper));
  background-size:0 2px;background-position:0 100%;
  background-repeat:no-repeat;transition:background-size .5s var(--ease);
  padding-bottom:2px;
}
.copper-underline.visible,.copper-underline:hover{background-size:100% 2px}

/* 3D card tilt handled in JS */
.tilt-card{transition:transform .15s ease-out}