ÿþ<?php
require_once dirname(__FILE__) . "/../config/config.php";
require_once dirname(__FILE__) . "/../includes/database.php";
$pageTitle = "Unit Converter - Length, Mass, Temperature";
$pageDescription = "Free unit converter for length, mass, weight, temperature with instant results.";
include dirname(__FILE__) . "/../templates/header.php";
?>
<section style="padding: 40px 0 60px;">
    <div class="container" style="max-width: 900px;">
        <nav aria-label="breadcrumb" style="margin-bottom: 2rem;">
            <ol class="breadcrumb" style="background: transparent; padding: 0; margin: 0;">
                <li class="breadcrumb-item"><a href="<?php echo BASE_URL; ?>" style="color: var(--skz-text-muted);">Home</a></li>
                <li class="breadcrumb-item"><a href="<?php echo BASE_URL; ?>tools/" style="color: var(--skz-text-muted);">Tools</a></li>
                <li class="breadcrumb-item active">Unit Converter</li>
            </ol>
        </nav>
        <div class="text-center mb-5">
            <h1 style="font-size: clamp(2rem, 4vw, 2.75rem); margin-bottom: 1rem;">Unit Converter</h1>
            <p style="font-size: 1.125rem; color: var(--skz-text-muted);">Convert length, mass, and temperature</p>
        </div>
        <div class="card" style="border: 1px solid var(--skz-border); border-radius: var(--skz-radius-lg); box-shadow: var(--skz-shadow);">
            <div class="card-body p-4 p-md-5">
                <div class="row g-3 mb-3">
                    <div class="col-md-6"><label class="form-label" style="font-weight: 500;">Category</label><select id="cat" class="form-select" style="height: 44px; border-radius: 10px;"><option value="length">Length</option><option value="mass">Mass</option><option value="temp">Temperature</option></select></div>
                    <div class="col-md-6"><label class="form-label" style="font-weight: 500;">Value</label><input type="number" id="val" class="form-control" style="height: 44px; border-radius: 10px;" value="1"></div>
                    <div class="col-md-6"><label class="form-label" style="font-weight: 500;">From</label><select id="from" class="form-select" style="height: 44px; border-radius: 10px;"></select></div>
                    <div class="col-md-6"><label class="form-label" style="font-weight: 500;">To</label><select id="to" class="form-select" style="height: 44px; border-radius: 10px;"></select></div>
                </div>
                <button id="conv" class="btn" style="background: var(--skz-navy); color: white; height: 44px; padding: 0 24px; border-radius: 10px;">Convert</button>
                <div id="resBox" class="mt-3 p-3" style="display:none; background: var(--skz-bg-alt); border-radius: 10px;"><strong id="res"></strong></div>
            </div>
        </div>
    </div>
</section>
<script>
const units = {length:{meter:1,kilometer:1000,centimeter:0.01,millimeter:0.001,mile:1609.344,yard:0.9144,foot:0.3048,inch:0.0254},mass:{kilogram:1,gram:0.001,milligram:0.000001,pound:0.453592,ounce:0.0283495,ton:1000},temp:{celsius:"C",fahrenheit:"F",kelvin:"K"}};
function load(){const cat=document.getElementById("cat").value;const from=document.getElementById("from");const to=document.getElementById("to");from.innerHTML="";to.innerHTML="";if(cat==="temp"){["celsius","fahrenheit","kelvin"].forEach(x=>{from.innerHTML+="<option value=\""+x+"\">"+x+"</option>";to.innerHTML+="<option value=\""+x+"\">"+x+"</option>";});to.value="fahrenheit";return;}Object.keys(units[cat]).forEach(x=>{from.innerHTML+="<option value=\""+x+"\">"+x+"</option>";to.innerHTML+="<option value=\""+x+"\">"+x+"</option>";});to.selectedIndex=1;}
document.getElementById("cat").addEventListener("change",load);load();
document.getElementById("conv").addEventListener("click",function(){const cat=document.getElementById("cat").value;const v=parseFloat(document.getElementById("val").value);if(isNaN(v)){alert("Enter a number");return;}const from=document.getElementById("from").value;const to=document.getElementById("to").value;if(cat==="temp"){let c;if(from==="celsius")c=v;else if(from==="fahrenheit")c=(v-32)*5/9;else c=v-273.15;let r;if(to==="celsius")r=c;else if(to==="fahrenheit")r=c*9/5+32;else r=c+273.15;document.getElementById("res").textContent=v+" "+from+" = "+r.toFixed(4)+" "+to;document.getElementById("resBox").style.display="block";return;}const base=v*units[cat][from];const r2=base/units[cat][to];document.getElementById("res").textContent=v+" "+from+" = "+r2.toFixed(6)+" "+to;document.getElementById("resBox").style.display="block";});
</script>
<?php include dirname(__FILE__) . "/../templates/footer.php"; ?>