/* Root theme */
:root{--brand:#0b5cff;--brand-dark:#0a58d8;--muted:#6b7280;--bg:#ffffff;--bg-alt:#f8fafc;--border:#e6e9ef;--text:#111827;--radius:12px}
*{box-sizing:border-box}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,'Helvetica Neue',Arial;line-height:1.55;color:var(--text);background:var(--bg);margin:0;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block;image-rendering:auto;-ms-interpolation-mode:bicubic}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* Typography */
h1{font-size:clamp(2rem,4vw,2.8rem);font-weight:600;letter-spacing:-.5px;margin:0 0 18px}
h2{font-size:clamp(1.6rem,3vw,2rem);font-weight:600;letter-spacing:-.4px;margin:0 0 16px}
h3{font-size:1.25rem;font-weight:600;margin:0 0 12px}
p{margin:0 0 14px}
ul{margin:0 0 16px;padding-left:20px}
small{font-size:.8rem;color:var(--muted)}

/* Layout helpers */
.section{padding:56px 0}
.section.alt{background:var(--bg-alt)}
.center{text-align:center}
.grid{display:grid;gap:28px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.flex{display:flex}
.space-between{justify-content:space-between}
.items-center{align-items:center}

/* Cards */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 2px 6px rgba(0,0,0,.05);transition:box-shadow .25s,transform .25s}
.card:hover{box-shadow:0 8px 22px rgba(0,0,0,.08);transform:translateY(-3px)}
.program-card{display:flex;flex-direction:column;align-items:center;text-align:center}
.program-card .program-img{width:72px;height:72px;margin:0 auto 12px;object-fit:contain}
.program-card .card-content{width:100%}
@media (max-width:640px){
  .program-card .program-img{width:56px;height:56px}
}

/* Buttons */
.btn{display:inline-block;font-size:.95rem;padding:10px 18px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--text);text-decoration:none;font-weight:500;line-height:1.2;transition:background .25s,border-color .25s,color .25s,transform .15s;cursor:pointer}
.btn:hover{background:var(--bg-alt)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;border:1px solid var(--brand);box-shadow:0 2px 6px rgba(11,92,255,.3)}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark)}
.btn-primary:active{transform:translateY(1px)}
.btn-member-login{border:1px solid var(--brand);color:var(--brand);padding:8px 16px;border-radius:10px;font-weight:600}
.btn-member-login:hover{background:var(--brand);color:#fff}
.btn.disabled{opacity:.5;pointer-events:none}

/* Forms */
form label{display:block;font-size:.75rem;font-weight:600;margin:0 0 6px;text-transform:uppercase;letter-spacing:.5px;color:#475569}
form input[type=text],form input[type=email],form input[type=password],form input[type=number],form input[type=tel],form select,form textarea{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:#fff;font-size:.95rem;line-height:1.35;outline:none;transition:border-color .25s,box-shadow .25s}
form input:focus,form select:focus,form textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,92,255,.15)}
form textarea{min-height:140px;resize:vertical}
form .form-row{display:flex;gap:18px}
@media (max-width:640px){form .form-row{flex-direction:column}}

/* Alerts */
.alert{padding:16px 20px;border-radius:12px;font-size:.9rem;margin:20px 0;border:1px solid var(--border);background:var(--bg-alt)}
.alert.success{border-color:#16a34a;background:#dcfce7;color:#065f46}
.alert.error{border-color:#dc2626;background:#fee2e2;color:#991b1b}

/* Hero */
.hero{padding:90px 0 70px;background:linear-gradient(135deg,#eff6ff 0%,#ffffff 60%);position:relative;overflow:hidden}
.hero.dark{background:linear-gradient(135deg,#0b5cff,#0a58d8);color:#fff}
.hero .container{position:relative}
.hero p{max-width:640px;margin-left:auto;margin-right:auto}
.hero-slider{position:relative;width:100%;max-width:1100px;margin:0 auto;border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 40px rgba(0,0,0,.15)}
.hero-slider .slide{display:none;position:relative;min-height:450px}
.hero-slider .slide.active{display:block}
.hero-slider .slide img{width:100%;height:100%;min-height:450px;max-height:600px;object-fit:cover;border-radius:var(--radius)}
.hero-slider .slide-caption{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;z-index:5;max-width:800px;width:90%;padding:20px}
.hero-slider .slide-caption h2{margin:0 0 16px;font-size:clamp(2rem,4vw,3.2rem);color:#fff;font-weight:700;text-shadow:0 4px 20px rgba(0,0,0,.4);letter-spacing:-.5px;line-height:1.2}
.hero-slider .slide-caption p{margin:0 0 24px;color:#fff;font-size:clamp(1rem,2vw,1.3rem);text-shadow:0 2px 12px rgba(0,0,0,.5);font-weight:500}
.hero-slider .slide-caption .btn{display:inline-block;margin-top:8px;padding:14px 32px;font-size:1.05rem;font-weight:600;box-shadow:0 6px 20px rgba(0,0,0,.3);border:2px solid #fff}
.hero-slider .slide-caption .btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.4)}
.hero-slider .slide::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(to bottom,rgba(0,0,0,.3) 0%,rgba(0,0,0,.1) 50%,rgba(0,0,0,.4) 100%);z-index:1;border-radius:var(--radius)}
.slide-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.95);border:none;font-size:24px;padding:14px 20px;cursor:pointer;border-radius:50%;transition:all .3s;z-index:10;box-shadow:0 4px 12px rgba(0,0,0,.2);width:50px;height:50px;display:flex;align-items:center;justify-content:center;color:var(--brand)}
.slide-btn:hover{background:#fff;transform:translateY(-50%) scale(1.1);box-shadow:0 6px 16px rgba(0,0,0,.25)}
.slide-btn.prev{left:20px}
.slide-btn.next{right:20px}
@media (max-width:768px){
  .hero{padding:60px 0 40px}
  .hero-slider{border-radius:8px}
  .hero-slider .slide{min-height:350px}
  .hero-slider .slide img{min-height:350px;max-height:400px}
  .hero-slider .slide-caption{padding:16px;width:85%}
  .hero-slider .slide-caption h2{font-size:1.8rem;margin-bottom:12px}
  .hero-slider .slide-caption p{font-size:1rem;margin-bottom:18px}
  .hero-slider .slide-caption .btn{padding:12px 24px;font-size:.95rem}
  .slide-btn{font-size:20px;padding:10px;width:40px;height:40px}
  .slide-btn.prev{left:12px}
  .slide-btn.next{right:12px}
}
@media (max-width:480px){
  .hero-slider .slide{min-height:280px}
  .hero-slider .slide img{min-height:280px;max-height:320px}
  .hero-slider .slide-caption h2{font-size:1.5rem}
  .hero-slider .slide-caption p{font-size:.9rem}
  .hero-slider .slide-caption .btn{padding:10px 20px;font-size:.85rem}
  .slide-btn{width:36px;height:36px;font-size:18px}
  .slide-btn.prev{left:8px}
  .slide-btn.next{right:8px}
}

/* Header */
.site-header{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;transition:background .35s,box-shadow .35s}
.site-header.scrolled{box-shadow:0 6px 24px -4px rgba(0,0,0,.12);background:rgba(255,255,255,.9);backdrop-filter:blur(6px)}
.site-header .header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;align-items:center}
.brand img{height:50px;width:auto;object-fit:contain}
.brand-sub{font-size:.8rem;color:var(--muted);margin-left:12px;font-weight:600;letter-spacing:.5px}
@media (max-width:640px){
  .brand img{height:40px}
}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:var(--text);text-decoration:none;padding:10px 14px;border-radius:10px;font-size:.9rem;font-weight:500;transition:background .25s,color .25s}
.nav a:hover{background:var(--bg-alt)}
.nav a.active{background:var(--brand);color:#fff}
.nav-toggle{display:none;background:transparent;border:0;font-size:26px;cursor:pointer;padding:4px 8px;border-radius:8px}
.nav-toggle:hover{background:var(--bg-alt)}
.nav .btn{margin-left:4px}

/* Responsive nav */
@media (max-width:800px){
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 20px;border-bottom:1px solid var(--border);box-shadow:0 10px 24px -6px rgba(0,0,0,.12)}
  .nav.open{display:flex}
  .nav a{padding:14px 10px}
  .nav-toggle{display:block}
}

/* Main */
main{padding:32px 0 70px}

/* Footer */
footer.site-footer{padding:60px 0 28px;background:#0f172a;color:#e2e8f0;margin-top:40px}
footer.site-footer h4{margin:0 0 14px;font-size:1rem;color:#fff;letter-spacing:.5px}
footer.site-footer a{color:#cbd5e1;text-decoration:none;transition:color .25s}
footer.site-footer a:hover{color:#fff}
.footer-inner{display:grid;gap:36px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin-bottom:28px}
.footer-form input[type=email]{background:#1e293b;border:1px solid #334155;color:#fff}
.footer-form input[type=email]::placeholder{color:#94a3b8}
.footer-form button{width:100%}
.footer-meta{font-size:.75rem;text-align:center;color:#94a3b8}

/* Utilities */
.text-muted{color:var(--muted)}
.fade-in{animation:fade .6s ease both}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@media (prefers-reduced-motion:reduce){.fade-in{animation:none}}

/* Responsive Image Utilities */
.img-fluid{max-width:100%;height:auto;display:block}
.img-responsive{width:100%;height:auto;object-fit:cover}
.img-contain{object-fit:contain}

/* Invoice & Print Specific */
@media print{
  .invoice-logo img{max-width:150px;height:auto}
  img{page-break-inside:avoid}
}

/* Tablet Optimization (768px - 1024px) */
@media (min-width:768px) and (max-width:1024px){
  .container{padding:0 24px}
  .hero-slider .slide img{max-height:500px}
  .program-card .program-img{width:64px;height:64px}
  .grid.cards{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
}

/* Mobile Optimization (< 640px) */
@media (max-width:640px){
  .section{padding:40px 0}
  h1{font-size:1.75rem}
  h2{font-size:1.4rem}
  .card{padding:18px}
  .grid{gap:18px}
  img[loading="lazy"]{min-height:100px;background:var(--bg-alt)}
}