/* =========================
   Trainerkart.net – Base CSS
   ========================= */

/* Reset & helpers */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }
:root{
  --brand:#0b67ff;
  --brand-dark:#084ec4;
  --ink:#1f2937;
  --muted:#6b7280;
  --bg:#ffffff;
  --bg-alt:#f7f9fc;
  --border:#e5e7eb;
}

body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

/* Layout */
.container{
  width: min(1120px, 92%);
  margin: 0 auto;
}

/* Header / Nav */
header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}
header h1{
  font-size: 20px;
  margin: 0;
  white-space: nowrap;
}
header h1 a{ color: var(--brand); font-weight: 700; }
header nav ul{ display: flex; gap: 22px; }
header nav a{
  color: var(--ink);
  font-weight: 500;
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
}
header nav a:hover{ border-color: var(--brand); }

/* Hero */
.hero{
  background: linear-gradient(180deg, #eff6ff, #ffffff);
  border-bottom: 1px solid var(--border);
}
.hero .container{
  padding: 64px 0;
  text-align: center;
}
.hero h2{
  font-size: clamp(26px, 3.2vw, 40px);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.hero p{
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 18px;
}
.btn{
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  transition: transform .06s ease, background .2s ease;
}
.btn:hover{ background: var(--brand-dark); transform: translateY(-1px); }

/* Features */
.features .container{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 38px 0;
}
.feature{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 16px;
  background: var(--bg-alt);
}
.feature h3{
  margin: 0 0 6px;
  font-size: 18px;
}
.feature p{
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* Generic sections (if you add courses grid later) */
.section{
  padding: 48px 0;
}
.section h2{
  font-size: 28px;
  margin: 0 0 18px;
}

/* Footer */
footer{
  border-top: 1px solid var(--border);
  background: #fff;
}
footer .container{
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
footer p{ margin: 0; color: var(--muted); }
footer a{ color: var(--brand); }
footer a:hover{ color: var(--brand-dark); }

/* Utilities */
.mt-1{ margin-top: 6px; }
.mt-2{ margin-top: 12px; }
.mt-3{ margin-top: 18px; }
.text-center{ text-align:center; }

/* Responsive */
@media (max-width: 900px){
  header nav ul{ gap: 16px; }
  .features .container{
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px){
  header .container{
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }
  .features .container{
    grid-template-columns: 1fr;
  }
  footer .container{
    flex-direction: column;
    align-items: flex-start;
  }
}