/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:var(--fs-body-sm);font-weight:600;letter-spacing:0.04em;text-transform:uppercase;
  transition:all .25s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--navy-900);color:var(--white);}
.btn-primary:hover{background:var(--navy-700);}
.btn-outline{background:transparent;color:var(--navy-900);border:1px solid var(--navy-900);}
.btn-outline:hover{background:var(--navy-900);color:var(--white);}
.btn-red{background:var(--red-700);color:var(--white);}
.btn-red:hover{background:var(--red-500);}
.btn-ghost-white{background:transparent;color:var(--white);border:1px solid rgba(255,255,255,.4);}
.btn-ghost-white:hover{background:var(--white);color:var(--navy-900);}
.btn-text{
  display:inline-flex;align-items:center;gap:var(--sp-2);
  font-size:var(--fs-body-sm);font-weight:600;letter-spacing:0.04em;text-transform:uppercase;
  color:var(--navy-900);border-bottom:1px solid var(--navy-900);padding-bottom:2px;
}
.btn-text .arrow{transition:transform .25s var(--ease);}
.btn-text:hover .arrow{transform:translateX(4px);}

/* ===== Navbar ===== */
.navbar{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:var(--border);
}
.navbar-inner{
  max-width:var(--content-w);margin:0 auto;padding:0 var(--sp-6);
  height:84px;display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:var(--sp-3);}
.nav-logo img{height:48px;width:48px;object-fit:contain;}
.nav-logo-text{font-family:var(--font-display);font-size:16px;font-weight:600;color:var(--navy-900);line-height:1.15;}
.nav-logo-text span{display:block;font-family:var(--font-body);font-size:10px;letter-spacing:.14em;color:var(--gold-700);text-transform:uppercase;margin-top:2px;}

.nav-links{display:flex;align-items:center;gap:var(--sp-7);list-style:none;}
.nav-links a{
  font-size:var(--fs-body-sm);font-weight:500;color:var(--gray-800);
  position:relative;padding-bottom:6px;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--gold-500);
  transition:width .25s var(--ease);
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}
.nav-links a.active{color:var(--navy-900);font-weight:600;}

.nav-actions{display:flex;align-items:center;gap:var(--sp-5);}
.nav-search-btn{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border:var(--border);border-radius:var(--r-pill);color:var(--gray-600);transition:.2s;}
.nav-search-btn:hover{border-color:var(--navy-900);color:var(--navy-900);}

.nav-toggle{display:none;flex-direction:column;gap:5px;width:28px;}
.nav-toggle span{height:2px;background:var(--navy-900);width:100%;transition:.25s var(--ease);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-menu{
  display:none;position:fixed;inset:84px 0 0 0;background:var(--white);z-index:99;
  padding:var(--sp-6);transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:all .3s var(--ease);overflow-y:auto;
}
.mobile-menu.open{opacity:1;pointer-events:auto;transform:translateY(0);}
.mobile-menu a{display:block;padding:var(--sp-4) 0;font-size:var(--fs-h4);font-family:var(--font-display);border-bottom:var(--border);color:var(--navy-900);}
.mobile-menu .btn{margin-top:var(--sp-6);width:100%;}

/* ===== Section shell ===== */
.section{padding:var(--sp-11) var(--sp-6);}
.section-inner{max-width:var(--content-w);margin:0 auto;}
.section-navy{background:var(--navy-900);color:var(--white);}
.section-navy p{color:rgba(255,255,255,.65);}
.section-navy h2,.section-navy h3{color:var(--white);}

.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-6);margin-bottom:var(--sp-8);flex-wrap:wrap;}
.section-head h2{max-width:640px;}

/* ===== Hero ===== */
.hero{padding:var(--sp-10) var(--sp-6) var(--sp-11);}
.hero-inner{max-width:var(--content-w);margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:var(--sp-11);align-items:center;}
.hero-headline{margin:var(--sp-5) 0 var(--sp-6);}
.hero-desc{max-width:440px;margin-bottom:var(--sp-7);font-size:var(--fs-body-lg);}
.hero-actions{display:flex;gap:var(--sp-5);flex-wrap:wrap;}
.hero-visual{position:relative;}
.hero-visual-frame{
  position:relative;border:2px solid var(--gold-500);border-radius:var(--r-img);
  padding:14px;
}
.hero-visual-frame img{border-radius:calc(var(--r-img) - 6px);width:100%;aspect-ratio:4/5;object-fit:cover;}
.hero-stat-float{
  position:absolute;bottom:-28px;left:-28px;background:var(--white);
  border:var(--border);border-radius:var(--r-lg);padding:var(--sp-5) var(--sp-6);
  box-shadow:0 20px 40px -20px rgba(7,26,73,.25);min-width:180px;
}
.hero-stat-float .num{font-family:var(--font-display);font-size:32px;color:var(--navy-900);font-weight:700;}
.hero-stat-float .lbl{font-size:var(--fs-caption);letter-spacing:.08em;text-transform:uppercase;color:var(--gray-600);margin-top:2px;}
.hero-decor-ring{
  position:absolute;top:-30px;right:-30px;width:90px;height:90px;
  border:1px solid var(--gold-500);border-radius:50%;
}
.hero-decor-ring::after{
  content:"★";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--gold-500);font-size:20px;
}

/* ===== Intro split (type left / image right) ===== */
.intro-split{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-11);align-items:center;}
.intro-copy p{margin-top:var(--sp-5);max-width:460px;}
.intro-number{display:flex;align-items:baseline;gap:var(--sp-3);margin-top:var(--sp-7);}
.intro-number .num{font-family:var(--font-display);font-size:40px;color:var(--gold-700);font-weight:700;}
.intro-number .lbl{font-size:var(--fs-body-sm);color:var(--gray-600);max-width:160px;}
.intro-image img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:var(--r-img);}

/* ===== Featured course (large overlap) ===== */
.featured-course{position:relative;}
.featured-course-media{width:100%;aspect-ratio:16/8.2;object-fit:cover;border-radius:var(--r-img);}
.featured-panel{
  position:relative;margin:-90px auto 0;max-width:520px;background:var(--white);
  border:var(--border);border-radius:var(--r-lg);padding:var(--sp-7);
  box-shadow:0 30px 60px -30px rgba(7,26,73,.3);
}
.featured-panel .badge{margin-bottom:var(--sp-4);}
.featured-panel h3{margin-bottom:var(--sp-5);}
.featured-meta{display:flex;gap:var(--sp-6);flex-wrap:wrap;font-size:var(--fs-body-sm);color:var(--gray-600);margin-bottom:var(--sp-6);padding-bottom:var(--sp-6);border-bottom:var(--border);}
.featured-meta strong{color:var(--navy-900);}
.featured-cta{display:flex;align-items:center;justify-content:space-between;}
.featured-price{font-family:var(--font-display);font-size:28px;color:var(--navy-900);font-weight:700;}

/* ===== Badge ===== */
.badge{
  display:inline-block;padding:6px 14px;border-radius:var(--r-pill);
  font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
}
.badge-gold{background:var(--gold-100);color:var(--gold-700);}
.badge-navy{background:var(--navy-100);color:var(--navy-800);}
.badge-red{background:var(--red-100);color:var(--red-700);}

/* ===== Stats strip (navy full-width) ===== */
.stats-strip{display:flex;justify-content:space-between;flex-wrap:wrap;gap:var(--sp-8);}
.stat-item{flex:1;min-width:150px;position:relative;padding-right:var(--sp-8);}
.stat-item:not(:last-child)::after{
  content:"";position:absolute;right:0;top:8px;bottom:8px;width:1px;background:rgba(255,255,255,.18);
}
.stat-item .num{font-family:var(--font-display);font-size:52px;color:var(--gold-500);font-weight:700;line-height:1;}
.stat-item .lbl{margin-top:var(--sp-3);font-size:var(--fs-body-sm);color:rgba(255,255,255,.7);letter-spacing:.02em;}

/* ===== Category tabs ===== */
.tabs{display:flex;gap:var(--sp-3);flex-wrap:wrap;margin-bottom:var(--sp-7);}
.tab{
  padding:10px 20px;border-radius:var(--r-pill);border:var(--border);
  font-size:var(--fs-body-sm);font-weight:500;color:var(--gray-600);transition:.2s;
}
.tab:hover{border-color:var(--navy-500);color:var(--navy-900);}
.tab.active{background:var(--navy-900);border-color:var(--navy-900);color:var(--white);}

/* ===== Course row (horizontal editorial) ===== */
.course-list{display:flex;flex-direction:column;}
.course-row{
  display:grid;grid-template-columns:280px 1fr;gap:var(--sp-7);
  padding:var(--sp-7) 0;border-bottom:var(--border);transition:.2s;
}
.course-row:first-child{border-top:var(--border);}
.course-row:hover{background:var(--gray-50);}
.course-row-img{width:100%;height:180px;object-fit:cover;border-radius:var(--r-img);}
.course-row-body{display:flex;flex-direction:column;justify-content:center;min-width:0;}
.course-row-title{margin:var(--sp-3) 0 var(--sp-3);}
.course-row-desc{max-width:560px;font-size:var(--fs-body-sm);margin-bottom:var(--sp-5);}
.course-row-lecturer{font-size:var(--fs-body-sm);font-weight:600;color:var(--navy-900);margin-bottom:var(--sp-3);}
.course-row-meta{display:flex;gap:var(--sp-5);flex-wrap:wrap;font-size:var(--fs-body-sm);color:var(--gray-600);margin-bottom:var(--sp-5);}
.course-row-meta .star{color:var(--gold-500);}
.course-row-footer{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);flex-wrap:wrap;}
.course-row-price{font-family:var(--font-display);font-size:24px;font-weight:700;color:var(--navy-900);}
.course-row-price.free{color:var(--red-700);}

/* ===== Lecture archive row ===== */
.lecture-list{border-top:var(--border);}
.lecture-row{
  display:grid;grid-template-columns:56px 1fr auto;gap:var(--sp-6);align-items:center;
  padding:var(--sp-6) 0;border-bottom:var(--border);transition:.2s;
}
.lecture-row:hover{background:var(--gray-50);}
.lecture-num{font-family:var(--font-display);font-size:20px;color:var(--gold-700);font-weight:600;}
.lecture-title{font-family:var(--font-display);font-size:19px;color:var(--navy-900);margin-bottom:var(--sp-2);}
.lecture-meta{font-size:var(--fs-body-sm);color:var(--gray-600);display:flex;gap:var(--sp-4);flex-wrap:wrap;}
.lecture-play{
  display:flex;align-items:center;gap:var(--sp-3);font-size:var(--fs-body-sm);font-weight:600;
  letter-spacing:.04em;text-transform:uppercase;color:var(--navy-900);white-space:nowrap;
}
.lecture-play-icon{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--navy-900);
  display:flex;align-items:center;justify-content:center;transition:.2s;
}
.lecture-row:hover .lecture-play-icon{background:var(--navy-900);color:var(--white);}

/* ===== Faculty (editorial portraits) ===== */
.faculty-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:var(--sp-6);}
.faculty-portrait{
  position:relative;border-radius:var(--r-img);overflow:hidden;aspect-ratio:3/4;
}
.faculty-portrait img{width:100%;height:100%;object-fit:cover;}
.faculty-portrait::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg, rgba(7,26,73,.92) 0%, rgba(7,26,73,.55) 30%, transparent 62%);
}
.faculty-overlay{position:absolute;left:0;right:0;bottom:0;padding:var(--sp-6);z-index:2;color:var(--white);}
.faculty-overlay .fac-gold-line{width:32px;height:2px;background:var(--gold-500);margin-bottom:var(--sp-3);}
.faculty-overlay .fac-name{font-family:var(--font-display);font-size:22px;font-weight:600;}
.faculty-overlay .fac-role{font-size:var(--fs-body-sm);color:rgba(255,255,255,.75);margin-top:2px;}
.faculty-secondary{display:flex;flex-direction:column;gap:var(--sp-6);}

/* ===== Testimonial ===== */
.testimonial{display:grid;grid-template-columns:1fr .55fr;gap:var(--sp-9);align-items:center;}
.testimonial-mark{font-family:var(--font-display);font-size:120px;color:var(--gold-500);line-height:.6;opacity:.5;}
.testimonial-quote{font-family:var(--font-display);font-size:32px;line-height:1.35;color:var(--navy-900);font-weight:500;margin-top:var(--sp-4);}
.testimonial-author{display:flex;align-items:center;gap:var(--sp-4);margin-top:var(--sp-7);}
.testimonial-author-name{font-weight:600;color:var(--navy-900);}
.testimonial-author-role{font-size:var(--fs-body-sm);color:var(--gray-600);}
.testimonial-photo img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r-img);}

/* ===== Values rows ===== */
.value-row{
  display:grid;grid-template-columns:80px 1fr 200px;align-items:center;gap:var(--sp-6);
  padding:var(--sp-7) 0;border-bottom:var(--border);cursor:default;transition:.3s var(--ease);
}
.value-row:first-child{border-top:var(--border);}
.value-row .v-num{font-family:var(--font-display);font-size:22px;color:var(--gold-700);}
.value-row .v-title{font-family:var(--font-display);font-size:26px;color:var(--navy-900);}
.value-row .v-desc{font-size:var(--fs-body-sm);color:var(--gray-600);max-width:340px;opacity:0;max-height:0;overflow:hidden;transition:.3s var(--ease);}
.value-row:hover{background:var(--navy-900);padding-left:var(--sp-5);padding-right:var(--sp-5);}
.value-row:hover .v-num,.value-row:hover .v-title{color:var(--white);}
.value-row:hover .v-desc{color:rgba(255,255,255,.7);opacity:1;max-height:80px;}

/* ===== Final CTA ===== */
.final-cta{text-align:center;padding:var(--sp-12) var(--sp-6);}
.final-cta h2{max-width:680px;margin:0 auto var(--sp-7);}
.final-cta-actions{display:flex;justify-content:center;gap:var(--sp-5);flex-wrap:wrap;}

/* ===== Footer ===== */
.footer{background:var(--navy-900);color:rgba(255,255,255,.7);padding:var(--sp-10) var(--sp-6) var(--sp-6);}
.footer-inner{max-width:var(--content-w);margin:0 auto;}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:var(--sp-8);padding-bottom:var(--sp-9);border-bottom:var(--border-dark);}
.footer-brand{display:flex;align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-5);}
.footer-brand img{height:42px;width:42px;}
.footer-brand-text{font-family:var(--font-display);font-size:15px;color:var(--white);}
.footer-desc{max-width:280px;font-size:var(--fs-body-sm);}
.footer-social{display:flex;align-items:center;gap:var(--sp-2);margin-top:var(--sp-5);flex-wrap:wrap;}
.footer-social a{width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:rgba(255,255,255,.8);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);transition:.2s;}
.footer-social a:hover{color:var(--navy-900);background:var(--gold-500);border-color:var(--gold-500);}
.footer-col h4{color:var(--white);font-family:var(--font-body);font-size:var(--fs-body-sm);letter-spacing:.06em;text-transform:uppercase;margin-bottom:var(--sp-5);}
.footer-col a{display:block;font-size:var(--fs-body-sm);padding:6px 0;transition:.2s;}
.footer-col a:hover{color:var(--gold-500);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:var(--sp-6);font-size:var(--fs-caption);flex-wrap:wrap;gap:var(--sp-4);}

/* ===== Back to top ===== */
.back-to-top{
  position:fixed;bottom:28px;right:28px;width:46px;height:46px;border-radius:50%;
  background:var(--navy-900);color:var(--white);display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:.3s var(--ease);z-index:80;
}
.back-to-top.show{opacity:1;pointer-events:auto;}
.back-to-top:hover{background:var(--gold-700);}

/* ===== Reveal on scroll ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:translateY(0);}

/* ===== Toast ===== */
.toast-wrap{position:fixed;top:100px;right:24px;display:flex;flex-direction:column;gap:10px;z-index:200;}
.toast{
  background:var(--navy-900);color:var(--white);padding:14px 20px;border-radius:var(--r-md);
  font-size:var(--fs-body-sm);box-shadow:0 12px 30px -10px rgba(0,0,0,.4);
  border-left:3px solid var(--gold-500);min-width:240px;
  animation:toastIn .3s var(--ease);
}
@keyframes toastIn{from{opacity:0;transform:translateX(30px);}to{opacity:1;transform:translateX(0);}}