/* GlassesGuide — Optical Precision Design System */
:root{
  /* Neutral — Optical white to deep navy */
  --white:#FFFEFC; --paper:#F7F8FA; --paper-dark:#EDEFF3;
  --grey-100:#E4E7EC; --grey-200:#C8CDD4; --grey-300:#9BA3AE;
  --grey-500:#5F6B7A; --grey-700:#2D3748; --grey-900:#111827;
  /* Brand — Optical blue + teal (precision, clarity, trust) */
  --blue-50:#F0F4FF; --blue-100:#DCE5FD; --blue-400:#3B6FE0;
  --blue-600:#234FB0; --blue-900:#0F2555;
  --teal-50:#EFFAF7; --teal-100:#D2F2EA; --teal-400:#0EA882;
  --teal-600:#0A7D62; --teal-900:#064233;
  /* Semantic */
  --brand:var(--blue-400); --brand-hover:var(--blue-600);
  --accent:var(--teal-400);
  --ink:var(--grey-900); --ink-soft:var(--grey-700); --ink-muted:var(--grey-500);
  --line:var(--grey-100); --line-strong:var(--grey-200);
  --radius:8px; --radius-lg:12px;
  /* Savings highlight */
  --save:#0EA882;
  --save-bg:rgba(14,168,130,.06);
}

*,*::before,*::after{box-sizing:border-box}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  background:var(--paper); color:var(--ink);
  line-height:1.68; -webkit-font-smoothing:antialiased;
  margin:0; font-weight:400;
  overflow-x:hidden;
}

/* ── Background Energy Field ── */
body::after{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:1;
  background:
    radial-gradient(ellipse 700px 500px at 15% 10%, rgba(59,111,224,.04) 0%, transparent 60%),
    radial-gradient(ellipse 500px 400px at 80% 60%, rgba(14,168,130,.03) 0%, transparent 55%),
    radial-gradient(ellipse 400px 350px at 50% 35%, rgba(59,111,224,.02) 0%, transparent 50%);
  background-size:200% 200%;
  animation:energyField 20s ease-in-out infinite;
  opacity:.9;
}
@keyframes energyField{
  0%{background-position:0% 50%}
  33%{background-position:100% 30%}
  66%{background-position:30% 75%}
  100%{background-position:0% 50%}
}

/* ── Floating Glasses Particles ── */
@keyframes floatUp{0%{transform:translateY(105vh) rotate(0deg) scale(.5);opacity:0}10%{opacity:1}85%{opacity:.7}100%{transform:translateY(-8vh) rotate(25deg) scale(1.1);opacity:0}}
@keyframes wobble{0%,100%{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}
@keyframes lensFlare{0%,100%{opacity:0;transform:scale(.8)}50%{opacity:.6;transform:scale(1.3)}}
.glasses-particle{position:fixed;pointer-events:none;z-index:2;font-size:28px;opacity:0;animation:floatUp 10s ease-in infinite;filter:drop-shadow(0 0 8px rgba(59,111,224,.15))}
.glasses-particle:nth-child(odd){font-size:32px;animation-duration:12s;animation-delay:-3s}
.glasses-particle:nth-child(3n){font-size:24px;animation-duration:9s;animation-delay:-6s}
.glasses-particle:nth-child(4n+1){font-size:36px;animation-duration:14s;animation-delay:-2s}
.lens-flare{position:fixed;pointer-events:none;z-index:1;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,rgba(59,111,224,.08) 0%,transparent 70%);animation:lensFlare 6s ease-in-out infinite}

/* ── Typography ── */
h1{font-family:'Crimson Text',Georgia,'Times New Roman',serif;font-weight:600;letter-spacing:-0.01em;line-height:1.1}
h2{font-family:'Inter',sans-serif;font-weight:700;letter-spacing:-0.02em;line-height:1.2}
h3{font-family:'Inter',sans-serif;font-weight:600;line-height:1.3}
.display{font-family:'Crimson Text',Georgia,serif;font-weight:600}
.mono{font-family:'JetBrains Mono','Consolas',monospace}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* ── Cards ── */
.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:0 1px 3px rgba(0,0,0,.03);
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 32px rgba(0,0,0,.06),0 2px 8px rgba(0,0,0,.03);
  border-color:var(--line-strong);
}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;padding:13px 28px;
  border-radius:6px;text-decoration:none;
  transition:all .25s cubic-bezier(.4,0,.2,1);
  font-family:'Inter',sans-serif;cursor:pointer;border:none;
  position:relative;overflow:hidden;
}
.btn-primary{
  background:var(--brand);color:#fff;
  box-shadow:0 2px 8px rgba(59,111,224,.18);
}
.btn-primary:hover{
  background:var(--brand-hover);transform:translateY(-1px);
  box-shadow:0 6px 24px rgba(59,111,224,.25);
}
.btn-primary::after{
  content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);
  transition:left .5s ease;
}
.btn-primary:hover::after{left:100%}
.btn-primary:active{transform:translateY(0)}

.btn-outline{
  border:1.5px solid var(--line-strong);color:var(--ink-soft);
  background:transparent;
}
.btn-outline:hover{
  background:var(--ink);color:#fff;border-color:var(--ink);
  transform:translateY(-1px);
}

.btn-save{
  background:var(--save-bg);color:var(--save);
  border:1px solid rgba(14,168,130,.15);
  font-weight:600;
}
.btn-save:hover{
  background:var(--save);color:#fff;
  transform:translateY(-1px);
}

/* ── Tags ── */
.tag{
  display:inline-flex;align-items:center;gap:4px;
  font-size:11px;font-weight:700;padding:4px 12px;border-radius:4px;
  font-family:'JetBrains Mono',monospace;text-transform:uppercase;
  letter-spacing:.04em;
}
.tag-save{background:var(--save-bg);color:var(--save)}
.tag-blue{background:var(--blue-50);color:var(--brand)}
.tag-sale{background:rgba(220,38,38,.08);color:#DC2626}

/* ── Price ── */
.price{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;letter-spacing:-0.02em;
}
.price-lg{font-size:28px;color:var(--ink)}
.price-sm{font-size:15px}
.price-strike{text-decoration:line-through;color:var(--ink-muted);font-weight:400}

/* ── Section ── */
.badge{
  display:inline-block;font-size:11px;font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;
  padding:5px 14px;border-radius:4px;margin-bottom:12px;
}
.badge-blue{background:var(--blue-50);color:var(--brand)}
.badge-teal{background:var(--teal-50);color:var(--teal-400)}
.badge-save{background:var(--save-bg);color:var(--save)}

/* ── Hero ── */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(175deg,#F0F4FF 0%,#F7F8FA 40%,#EFFAF7 100%);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(circle 500px at 20% 30%,rgba(59,111,224,.06) 0%,transparent 60%),
    radial-gradient(circle 300px at 75% 60%,rgba(14,168,130,.04) 0%,transparent 50%);
  pointer-events:none;z-index:0;
}
.hero>*{position:relative;z-index:1}

/* ── Flash Deal Banner ── */
.deal-banner{
  background:linear-gradient(135deg,#111827,#1E3A5F,#0F2555);
  color:#fff;border-radius:var(--radius-lg);
  padding:24px 32px;position:relative;overflow:hidden;
}
.deal-banner::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle 200px at 80% 50%,rgba(59,111,224,.15) 0%,transparent 60%);
  pointer-events:none;
}
.deal-banner .btn-primary{background:#fff;color:var(--blue-900);box-shadow:0 2px 12px rgba(255,255,255,.15)}
.deal-banner .btn-primary:hover{background:#E8ECF4;box-shadow:0 4px 20px rgba(255,255,255,.2)}

/* ── Category Cards ── */
.cat-card{
  display:flex;flex-direction:column;align-items:center;
  padding:32px 20px;text-align:center;
  border-radius:var(--radius-lg);
  background:var(--white);
  border:1px solid var(--line);
  text-decoration:none;color:var(--ink);
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.cat-card:hover{
  transform:translateY(-4px);
  box-shadow:0 12px 40px rgba(0,0,0,.08);
  border-color:var(--brand);
  color:var(--ink);text-decoration:none;
}
.cat-icon{font-size:40px;margin-bottom:12px}
.cat-title{font-weight:700;font-size:16px;margin-bottom:4px}

/* ── Comparison Table ── */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:600px}
thead th{
  text-align:left;padding:14px 16px;font-size:10px;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;
  color:var(--ink-muted);background:var(--paper-dark);
  border-bottom:2px solid var(--line-strong);
  font-family:'JetBrains Mono',monospace;
}
tbody td{padding:14px 16px;border-bottom:1px solid var(--line);color:var(--ink-soft)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:var(--blue-50)}
tbody tr.best-row{background:rgba(14,168,130,.04)}
tbody tr.best-row td:first-child{position:relative}
tbody tr.best-row td:first-child::before{
  content:'Best';position:absolute;top:4px;left:8px;
  font-size:8px;font-weight:700;text-transform:uppercase;
  color:var(--save);font-family:'JetBrains Mono',monospace;
}

/* ── FAQ ── */
details.card{cursor:pointer;padding:18px 24px}
details.card summary{font-weight:600;font-size:15px;color:var(--ink);list-style:none}
details.card summary::-webkit-details-marker{display:none}
details.card p{font-size:14px;color:var(--ink-soft);margin-top:12px;line-height:1.7}

/* ── Stat Badge ── */
.stat-num{
  font-family:'JetBrains Mono',monospace;
  font-weight:800;font-size:24px;color:var(--brand);
  letter-spacing:-0.03em;
}
.stat-label{font-size:12px;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.06em}

/* ── Trust Bar ── */
.trust-bar{
  display:flex;gap:32px;justify-content:center;flex-wrap:wrap;
  padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.trust-item{text-align:center}

/* ── z-index ── */
nav,main,section,.card{position:relative;z-index:3}

/* ── Mobile ── */
@media(max-width:768px){
  h1{font-size:clamp(1.6rem,5vw,2.4rem)!important}
  h2{font-size:1.3rem!important}
  .card{padding:20px!important}
  .hero{padding:40px 16px!important}
  .trust-bar{gap:16px;font-size:13px}
  nav>div{flex-wrap:wrap;gap:6px;padding:6px 12px!important;justify-content:center}
  nav a{font-size:12px!important;padding:5px 10px!important}
  [style*="grid-template-columns"]:not([style*="1fr"]){grid-template-columns:1fr!important}
  .btn{padding:12px 22px;font-size:14px}
  .deal-banner{padding:20px 24px}
  table{font-size:12px}
  thead th,tbody td{padding:10px 12px}
}

@media print{
  body::after,.deal-banner::before{display:none!important}
  .card{box-shadow:none!important;border:1px solid #ddd!important}
}