*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Arial,Helvetica,sans-serif;background:#eaf7fc;color:#202124;min-height:100vh}
header{background:#fff;text-align:center;padding:14px 20px 12px;border-bottom:1px solid #d9edf5}
.header-bar{position:relative;max-width:1100px;margin:0 auto}
.site-name{font-size:30px;font-weight:700;letter-spacing:-.8px;line-height:1.15}
.site-name a{color:#202124;text-decoration:none}
.page-title{font-size:15px;margin-top:4px;color:#30343b}
.contact{position:absolute;right:0;top:0;color:#247a9b;text-decoration:none;font-size:14px;font-weight:700;padding:7px 11px;border:1px solid #c9e3ec;border-radius:7px;background:#f7fcfe}
.contact:hover{background:#eaf7fc}
.ad-slot{min-height:90px;display:flex;align-items:center;justify-content:center;color:#8ca2ac;font-size:12px;max-width:1100px;margin:0 auto}
.back-top{display:block;text-align:right;max-width:900px;margin:0 auto 8px;padding:0 20px}
.back-top a{color:#247a9b;text-decoration:none;font-size:14px;font-weight:700}
.back-top a:hover{text-decoration:underline}
.container{max-width:900px;margin:18px auto 35px;padding:0 20px}
.card{background:#fff;border:1px solid #d9edf5;border-radius:14px;padding:30px 34px;box-shadow:0 3px 12px rgba(0,0,0,.04)}
.card h1{margin:0 0 8px;font-size:28px}
.card h2{margin:0 0 14px;font-size:21px}
.intro{margin:0 0 22px;color:#66757f;font-size:15px}
.tool-description{margin:-10px 0 20px;color:#596a73;font-size:14px;line-height:1.45}
.input-help{display:block;margin:-1px 0 8px;color:#66757f;font-size:13px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{margin-bottom:16px}
.field label{display:block;margin-bottom:6px;font-size:14px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid #c8dbe3;border-radius:7px;background:#fff;font:inherit;color:#202124}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid #bfe5f3;border-color:#7fc5df}
.field textarea{min-height:130px;resize:vertical}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.actions button{border:0;border-radius:7px;background:#247a9b;color:#fff;padding:11px 20px;font-size:15px;font-weight:700;cursor:pointer}
.actions button:hover{background:#1e6f8e}
.actions .secondary{background:#6d8792}
.actions .secondary:hover{background:#5c737d}
.result{margin-top:24px;padding:18px 20px;border-radius:9px;background:#f3fbfe;border:1px solid #d9edf5}
.result-label{font-size:13px;font-weight:700;color:#66757f;margin-bottom:6px}
.answer{font-size:22px;font-weight:700;min-height:27px}
.small{margin-top:6px;color:#66757f;font-size:13px}
.clusters{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.box{background:#fff;border:1px solid #d9edf5;border-radius:14px;padding:22px;box-shadow:0 3px 12px rgba(0,0,0,.04)}
.tools{display:grid;grid-template-columns:1fr;gap:3px}
.tool{display:block;padding:10px 12px;border-radius:7px;background:#eaf7fc;color:#30343b;text-decoration:none;font-size:14px;border:1px solid transparent}
.tool:hover{border-color:#87ceeb;background:#e2f4fb}
.more{display:inline-block;margin-top:15px;color:#247a9b;text-decoration:none;font-size:14px;font-weight:700}
.more:hover{text-decoration:underline}
.category-page{max-width:800px;margin:0 auto;background:#fff;border:1px solid #d9edf5;border-radius:14px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.04)}
.category-page h1{margin:0 0 8px;font-size:28px}
.category-intro{color:#66757f;margin:0 0 20px}
.group{margin-top:22px}
.group h2{font-size:18px;margin:0 0 10px;padding-bottom:7px;border-bottom:1px solid #e5eef2}
footer{text-align:center;color:#71808a;font-size:13px;padding:18px 20px 35px}
@media(max-width:700px){
 header{padding:12px 14px 10px}.site-name{font-size:25px}.page-title{font-size:14px}
 .contact{right:0;top:-1px;font-size:13px;padding:6px 8px}
 .container{margin:12px auto 25px;padding:0 12px}.card{padding:22px 18px}.card h1{font-size:24px}
 .form-grid{grid-template-columns:1fr;gap:0}.clusters{grid-template-columns:1fr;gap:16px}
 .box{padding:18px}.category-page{padding:20px 17px}.back-top{padding:0 12px}
 .ad-slot{min-height:70px}
}

.convert-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
@media(max-width:700px){.convert-grid{grid-template-columns:1fr;gap:0}}

.convert-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}.tool-link-button{display:inline-block;background:#247a9b;color:#fff!important;padding:11px 20px;border-radius:7px;text-decoration:none;font-weight:700}@media(max-width:700px){.convert-grid{grid-template-columns:1fr;gap:0}}

/* V7 LIVE UPDATED 1630 — homepage only */
body {
    background: #d9f1ec;
}
header {
    background: #ffffff;
}
.ad-slot {
    background: #d9f1ec;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #879994;
}
footer {
    background: #d9f1ec;
}

/* V7 LIVE UPDATED 1640 — light brown homepage background option */
body {
    background: #f1e4d4;
}
.ad-slot {
    background: #f1e4d4;
}
footer {
    background: #f1e4d4;
}

/* V4 — Back-to-Home stays on its existing line, aligned right */
.back-home,
.back-link,
a.back-home,
a.back-link {
    margin-left: auto;
}

/* V4 — always-visible number spinner for converter inputs */
.converter-page input[type="number"],
input.converter-input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
    padding-right: 34px;
    background-image:
      linear-gradient(#fff,#fff),
      linear-gradient(#d8e5e8,#d8e5e8);
    background-origin: padding-box, border-box;
}
.number-spinner-wrap {
    position: relative;
}
.number-spinner-wrap .spinner-up,
.number-spinner-wrap .spinner-down {
    position: absolute;
    right: 7px;
    width: 18px;
    height: 14px;
    border: 1px solid #b8c7cc;
    background: #f5f8f9;
    color: #52666d;
    font-size: 10px;
    line-height: 11px;
    text-align: center;
    cursor: pointer;
    z-index: 2;
}
.number-spinner-wrap .spinner-up { top: 4px; }
.number-spinner-wrap .spinner-down { bottom: 4px; }
.number-spinner-wrap .spinner-up:active,
.number-spinner-wrap .spinner-down:active {
    background: #e4ecef;
}
@media (max-width: 760px) {
    .number-spinner-wrap .spinner-up,
    .number-spinner-wrap .spinner-down {
        display: block;
    }
}