/* ===== Base ===== */
*{box-sizing:border-box}
:root{
  --bg:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --primary:#3285a8;
  --surface:#f8fafc;
  --card:#ffffff;
  --border:#e5e7eb;
  --shadow:0 10px 20px rgba(0,0,0,.06);
  --radius:16px;
}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 1.2rem}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5rem}
h1{font-size:clamp(2rem,5vw,3rem)}
h2{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:.8rem}
h3{font-size:1.2rem;margin-bottom:.4rem}
p{margin:.4rem 0 1rem;color:var(--muted)}
.muted{color:var(--muted)}

/* ===== Header / Nav ===== */
.site-header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border);z-index:20}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:.6rem}
.logo{height:34px;width:auto}
.brand-text{font-weight:700;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:1rem}
.nav .btn{margin-left:.25rem}
.hamburger{display:none;background:none;border:0;padding:.5rem;cursor:pointer}
.hamburger span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:.2s}

/* ===== Buttons ===== */
.btn{display:inline-block;border:1px solid var(--text);padding:.6rem 1rem;border-radius:10px;color:var(--text)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:white;box-shadow:var(--shadow)}

/* ===== Hero ===== */
.hero{background:linear-gradient(180deg,#eef7fb, #fff);padding:2.2rem 0 2.8rem;border-bottom:1px solid var(--border)}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:2rem;align-items:center}
.cta-row{display:flex;gap:.8rem;margin-top:1rem}

/* ===== Sections ===== */
.highlights{background:var(--surface);padding:2.2rem 0}
.highlights-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow)}

.features{padding:2.2rem 0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.group{margin-top:1.2rem;color:var(--text)}

.how{background:var(--surface);padding:2.2rem 0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;align-items:center}
.rounded{border-radius:var(--radius)}
.shadow{box-shadow:var(--shadow)}

.exams{padding:2.2rem 0;text-align:center}

.pricing{background:var(--surface);padding:2.2rem 0}
.price .price-tag{font-size:2rem;margin:.2rem 0}
.price .price-tag span{font-size:1rem;color:var(--muted)}
.price.featured{border:2px solid var(--primary)}

.institutes{padding:2.2rem 0}
.testimonials{background:var(--surface);padding:2.2rem 0}
.quote p{font-style:italic;color:var(--text)}

.faq{padding:2.2rem 0}
.faq details{background:#fff;border:1px solid var(--border);border-radius:12px;padding:.6rem .8rem;margin:.5rem 0}

.contact{background:var(--surface);padding:2.2rem 0}
.form label{display:block;font-weight:600;margin:.6rem 0 .2rem}
.form input,.form textarea{width:100%;padding:.7rem;border:1px solid var(--border);border-radius:10px}
.form-note{font-size:.9rem;color:var(--muted)}

/* ===== Auth pages ===== */
.auth .auth-card{max-width:520px;margin:3rem auto}

/* ===== Legal pages ===== */
.legal{padding:2.2rem 0}

/* ===== Footer ===== */
.site-footer{border-top:1px solid var(--border);background:#fafafa;padding:1rem 0;margin-top:2rem}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:.6rem}
.footer-links{display:flex;gap:1rem}
.socials a{margin-left:1rem}

/* ===== Responsive ===== */
@media (max-width: 900px){
  .hero-inner{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .highlights-grid,.grid-3{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:64px;right:1rem;background:white;border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);padding:.6rem;flex-direction:column;gap:.6rem}
  .hamburger{display:block}
  .nav-links.open{display:flex}
}