/* ==========================================
   Opticlens International Co.
   FINAL + Mobile Hamburger Menu
========================================== */

:root{
  --bg:#0b0f17;
  --bg2:#070a10;
  --panel:rgba(255,255,255,0.05);
  --line:rgba(255,255,255,0.12);
  --text:#eaf1ff;
  --muted:rgba(234,241,255,0.72);
  --muted2:rgba(234,241,255,0.55);
  --accent:#7aa7ff;
  --shadow:0 24px 60px rgba(0,0,0,0.35);
  --radius:18px;
  --max:1120px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(122,167,255,0.10), transparent 60%),
    radial-gradient(900px 500px at 85% 18%, rgba(110,231,183,0.08), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}

a{text-decoration:none;color:inherit}
p{margin:0 0 14px}
h1,h2,h3{margin:0 0 12px}
ul{margin:0;padding-left:18px}

/* ===== Global centering (fix left-align everywhere) ===== */
main > section{padding:60px 22px}
main > section > *{max-width:var(--max);margin-left:auto;margin-right:auto}

/* ===== Navigation ===== */
.nav-wrap{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,14,22,0.75);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.nav-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:16px 22px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  position:relative;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:600;
}

.brand-mark{
  width:28px;
  height:28px;
  border-radius:8px;
  background:linear-gradient(135deg,#7aa7ff,#6ee7b7);
  box-shadow:var(--shadow);
}

.brand-name{white-space:nowrap}

.nav-links{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  align-items:center;
}

.nav-links a{
  font-size:14px;
  color:var(--muted);
  padding:8px 12px;
  border-radius:999px;
  border:1px solid transparent;
  transition:0.18s;
  white-space:nowrap;
}
.nav-links a:hover{
  background:rgba(255,255,255,0.06);
  color:var(--text);
  border-color:rgba(255,255,255,0.10);
}
.nav-links a.active{
  background:rgba(122,167,255,0.18);
  border:1px solid rgba(122,167,255,0.35);
  color:var(--text);
}

/* ===== Hamburger button (hidden on desktop) ===== */
.menu-toggle{
  display:none;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.14);
  color:var(--text);
  font-size:18px;
  padding:8px 12px;
  border-radius:12px;
  cursor:pointer;
}

/* ===== Backdrop (mobile) ===== */
.menu-backdrop{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.35);
  z-index:90;
}

/* ===== Mobile menu behavior ===== */
@media (max-width: 860px){

  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}

  /* hide inline nav; show as dropdown when open */
  .nav-links{
    display:none;
    position:absolute;
    right:22px;
    top:62px;
    flex-direction:column;
    gap:8px;
    padding:14px;
    border-radius:14px;
    border:1px solid var(--line);
    background:rgba(10,14,22,0.95);
    box-shadow:var(--shadow);
    z-index:110;
    min-width: 220px;
  }

  .nav-links.show{display:flex;animation:menuIn .15s ease-out}

  .menu-backdrop.show{display:block}

  .nav-links a{
    padding:10px 12px;
    border-radius:12px;
  }

  @keyframes menuIn{
    from{transform:translateY(-6px);opacity:0}
    to{transform:translateY(0);opacity:1}
  }
}

/* ===== Hero ===== */
.hero{padding-top:90px;padding-bottom:60px}

.hero-grid{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:28px;
  align-items:center;
}

@media (max-width:980px){.hero-grid{grid-template-columns:1fr}}

.kicker{
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--muted2);
}

.hero-title{
  font-size:48px;
  line-height:1.05;
  letter-spacing:-0.03em;
  max-width:26ch;
}

@media (max-width:600px){.hero-title{font-size:34px;max-width:none}}

.hero-subtitle{
  color:var(--muted);
  line-height:1.6;
  max-width:70ch;
}

.hero-cta{
  margin-top:18px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}

.hero-tags{
  margin-top:14px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.tag{
  font-size:12px;
  padding:7px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--muted);
  background:rgba(255,255,255,0.04);
}

/* ===== Grids ===== */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media (max-width:980px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* ===== Cards ===== */
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card-body{padding:22px}
.card-label{
  font-size:12px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted2);
  margin-bottom:8px;
}
.divider{height:1px;background:rgba(255,255,255,0.10);margin:14px 0}

/* ===== Buttons ===== */
.btn{
  padding:10px 20px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.15);
  background:rgba(255,255,255,0.05);
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:0.18s;
}
.btn:hover{transform:translateY(-1px)}
.btn.primary{
  background:linear-gradient(135deg,rgba(122,167,255,0.25),rgba(110,231,183,0.15));
  border-color:rgba(122,167,255,0.40);
}

/* ===== Lists ===== */
.list{list-style:none;padding:0;margin-top:12px;display:grid;gap:10px}
.list li{
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,0.03);
  color:var(--muted);
}

/* ===== Section Head ===== */
.section-head h2{font-size:28px;letter-spacing:-0.02em}
.section-sub{color:var(--muted);line-height:1.62;max-width:70ch}

/* ===== Footer ===== */
.footer{margin-top:60px;border-top:1px solid var(--line);padding:30px 22px}
.footer-inner{
  max-width:var(--max);
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  font-size:13px;
  color:var(--muted);
}
.footer-links a{color:var(--muted)}
.dot{margin:0 8px;color:rgba(255,255,255,0.3)}