/* Lightweight, pro-level stylesheet for Ashish Sir theme
   System fonts used for performance. Minimal, responsive and easy to override.
   Version: 1.0
*/

/* CSS Reset (small) */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}

/* Variables */
:root{
  --container-width:1140px;
  --space-xs:8px;
  --space-sm:12px;
  --space-md:20px;
  --space-lg:40px;
  --color-primary:#1a56db;
  --color-muted:#6b7280;
  --bg:#ffffff;
  --text:#111827;
  --radius:10px;
  --transition:200ms ease-in-out;
  --max-width:1200px;
}

/* Base typography (system stack for speed) */
body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-size:16px;
}

/* Layout container */
.container{
  width:90%;
  max-width:var(--container-width);
  margin-left:auto;
  margin-right:auto;
  padding-top:var(--space-md);
  padding-bottom:var(--space-md);
}

/* Header */
#site-header{
  border-bottom:1px solid #eef2f7;
  background:linear-gradient(180deg, rgba(255,255,255,0.98), rgba(255,255,255,0.9));
  position:sticky;
  top:0;
  z-index:1000;
  backdrop-filter: blur(6px);
}
.site-brand{
  display:flex;
  align-items:center;
  gap:var(--space-md);
  padding:calc(var(--space-sm)) 0;
}
.site-title a{
  font-weight:700;
  font-size:1.125rem;
  color:var(--text);
}

/* Nav */
#site-navigation ul{
  list-style:none;
  display:flex;
  gap:var(--space-md);
  align-items:center;
}
#site-navigation a{padding:10px 6px;display:inline-block;border-radius:6px;transition:var(--transition)}
#site-navigation a:hover{background:rgba(26,86,219,0.06)}

/* Hero */
.hero{
  padding:var(--space-lg) 0;
  text-align:left;
  background:linear-gradient(180deg, rgba(26,86,219,0.04), transparent);
  border-radius:var(--radius);
}
.hero h1{font-size:2rem;margin-bottom:var(--space-sm);font-weight:700}
.hero p{color:var(--color-muted);max-width:70%}

/* Cards (courses, features) */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:var(--space-md);
}
.card{
  background:#fff;
  border:1px solid #f1f5f9;
  border-radius:12px;
  padding:var(--space-md);
  box-shadow:0 6px 18px rgba(15,23,42,0.03);
  transition:transform var(--transition),box-shadow var(--transition);
}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(15,23,42,0.06)}
.card h3{margin-bottom:8px;font-size:1.05rem}
.card p{color:var(--color-muted);font-size:0.95rem}

/* Buttons */
.btn{
  display:inline-block;
  padding:10px 16px;
  border-radius:10px;
  background:var(--color-primary);
  color:#fff;
  font-weight:600;
  transition:opacity var(--transition);
}
.btn.secondary{background:transparent;color:var(--color-primary);border:1px solid rgba(26,86,219,0.12)}

/* Footer */
#site-footer{padding:var(--space-md) 0;border-top:1px solid #eef2f7;background:#fafafa}
#site-footer p{color:var(--color-muted);font-size:0.95rem}

/* Responsive adjustments */
@media (max-width:900px){
  .hero p{max-width:100%}
  #site-navigation ul{flex-direction:column;align-items:flex-start}
  .site-brand{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}
}

/* Utility helpers */
.text-center{text-align:center}
.mt-sm{margin-top:var(--space-sm)}
.mt-md{margin-top:var(--space-md)}
.ml-auto{margin-left:auto}



/* Mobile nav styles */
.mobile-menu-btn{
  display:none;
  background:transparent;
  border:0;
  cursor:pointer;
  padding:8px;
  border-radius:8px;
}
.mobile-menu-btn .hamburger{
  display:inline-block;
  width:22px;
  height:2px;
  background:var(--text);
  position:relative;
}
.mobile-menu-btn .hamburger::before,
.mobile-menu-btn .hamburger::after{
  content:'';
  position:absolute;
  left:0;
  width:22px;
  height:2px;
  background:var(--text);
  transition:transform var(--transition);
}
.mobile-menu-btn .hamburger::before{ top:-7px }
.mobile-menu-btn .hamburger::after{ top:7px }

.mobile-menu-btn.open .hamburger{
  background:transparent;
}
.mobile-menu-btn.open .hamburger::before{ transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.open .hamburger::after{ transform: translateY(-7px) rotate(-45deg); }

.mobile-nav{
  display:none;
  position:fixed;
  top:70px;
  right:16px;
  left:16px;
  background:var(--bg);
  border-radius:12px;
  box-shadow:0 12px 30px rgba(2,6,23,0.12);
  padding:16px;
  z-index:1500;
  max-height:70vh;
  overflow:auto;
}
.mobile-nav.active{ display:block; }

/* Ensure primary menu hides on small screens and mobile button shows */
@media (max-width:900px){
  #site-navigation{ display:none; }
  .mobile-menu-btn{ display:inline-flex; align-items:center; }
}