/* styles.css - Shoe Size Guide - Full unified stylesheet */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.65;color:#222;background:#f5f7fa}

/* =====================
   HEADER
   ===================== */
header{background:linear-gradient(135deg,#8a2e30,#B44446);color:#fff;padding:40px 20px;text-align:center}
header h1{font-size:clamp(1.8rem,5vw,2.6rem);margin-bottom:10px}
header p{font-size:clamp(1rem,2vw,1.15rem);opacity:.92;max-width:700px;margin:0 auto}

/* header-inner layout (inner pages) */
.header-inner{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;text-align:left;padding:0}
.header-inner .logo{color:#fff;text-decoration:none;font-size:1.4rem;font-weight:700;letter-spacing:.5px}
.nav-toggle{background:none;border:2px solid rgba(255,255,255,.6);color:#fff;font-size:1.3rem;padding:4px 10px;border-radius:6px;cursor:pointer;display:none}

/* =====================
   NAVIGATION
   ===================== */
/* index.html topnav */
.topnav{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000}
.topnav ul{display:flex;flex-wrap:wrap;justify-content:center;list-style:none;padding:12px 20px;gap:10px}
.topnav a{display:block;color:#B44446;text-decoration:none;padding:9px 18px;border-radius:6px;font-weight:600;font-size:.96rem;transition:background .2s}
.topnav a:hover,.topnav a.active{background:#fdeaea}

/* inner pages nav (#main-nav inside header) */
#main-nav{display:block}
#main-nav ul{display:flex;flex-wrap:wrap;list-style:none;gap:6px;padding:0;margin:0}
#main-nav ul li a{display:block;color:rgba(255,255,255,.85);text-decoration:none;padding:7px 14px;border-radius:6px;font-weight:600;font-size:.92rem;transition:background .2s}
#main-nav ul li a:hover,#main-nav ul li a.active{background:rgba(255,255,255,.2);color:#fff}

/* =====================
   LAYOUT / CONTAINER
   ===================== */
.container{max-width:920px;margin:0 auto;padding:25px 20px}
main{max-width:920px;margin:0 auto;padding:20px 20px 40px}

/* =====================
   ADS
   ===================== */
.ad-slot{margin:25px 0;text-align:center}

/* =====================
   HERO SECTION (inner pages)
   ===================== */
.hero{background:#fff;border-radius:12px;padding:28px 24px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:24px}
.hero h1{font-size:clamp(1.5rem,4vw,2rem);color:#8a2e30;margin-bottom:8px}
.hero p{color:#555;font-size:1rem;max-width:680px}

/* =====================
   CONVERTER (index.html)
   ===================== */
.converter-box{background:#fff;border-radius:12px;padding:26px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:22px}
.converter-box h2{color:#8a2e30;font-size:1.3rem;margin-bottom:18px}
.conv-form{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end}
.form-grp{display:flex;flex-direction:column}
.form-grp label{font-size:.82rem;font-weight:600;color:#666;margin-bottom:5px}
.form-grp select,.form-grp input{padding:10px 14px;font-size:1rem;border:2px solid #ddd;border-radius:6px;min-width:140px;transition:border-color .2s}
.form-grp select:focus,.form-grp input:focus{outline:none;border-color:#B44446}
.form-grp input{min-width:110px}
.conv-btn{padding:10px 28px;background:#B44446;color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}
.conv-btn:hover{background:#8a2e30}
.result-box{margin-top:18px;padding:18px;background:#fff0f0;border-radius:8px;border-left:4px solid #B44446;display:none}
.result-box h3{color:#8a2e30;font-size:1rem;margin-bottom:10px}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(95px,1fr));gap:10px}
.result-item{background:#fff;padding:10px;border-radius:6px;text-align:center}
.result-item .lbl{font-size:.72rem;color:#888;text-transform:uppercase}
.result-item .val{font-size:1.35rem;font-weight:700;color:#8a2e30}

/* =====================
   CONVERTER (inner pages)
   ===================== */
.converter-section{background:#fff;border-radius:12px;padding:26px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:24px}
.converter-section h2{color:#8a2e30;font-size:1.3rem;margin-bottom:18px}
.converter-inputs{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;margin-bottom:16px}
.converter-inputs label{display:block;font-size:.82rem;font-weight:600;color:#666;margin-bottom:5px}
.converter-inputs select,.converter-inputs input[type="number"]{padding:10px 14px;font-size:1rem;border:2px solid #ddd;border-radius:6px;min-width:140px;transition:border-color .2s;display:block}
.converter-inputs select:focus,.converter-inputs input[type="number"]:focus{outline:none;border-color:#B44446}
.btn{padding:10px 28px;background:#B44446;color:#fff;border:none;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s;text-decoration:none;display:inline-block}
.btn:hover{background:#8a2e30}
.converter-result{margin-top:4px;padding:18px;background:#fff0f0;border-radius:8px;border-left:4px solid #B44446;display:none}
.converter-result h3{color:#8a2e30;font-size:1rem;margin-bottom:10px}
.converter-result.visible{display:block}
.result-placeholder{color:#999;font-size:.92rem}

/* =====================
   CARDS (index.html)
   ===================== */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:18px;margin:25px 0}
.card{background:#fff;border-radius:12px;padding:28px 22px;text-align:center;box-shadow:0 2px 14px rgba(0,0,0,.08);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 6px 24px rgba(0,0,0,.12)}
.card-icon{font-size:2.6rem;margin-bottom:10px}
.card h2{font-size:1.28rem;color:#8a2e30;margin-bottom:8px}
.card p{color:#666;font-size:.95rem;margin-bottom:16px}
.card .btn{display:inline-block;background:#B44446;color:#fff;padding:9px 24px;border-radius:6px;text-decoration:none;font-weight:600;transition:background .2s}
.card .btn:hover{background:#8a2e30}

/* =====================
   SECTION TITLES & INFO
   ===================== */
.section-title{font-size:clamp(1.2rem,3vw,1.5rem);color:#8a2e30;border-bottom:2px solid #B44446;padding-bottom:6px;margin-bottom:16px}
.info-box{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 12px rgba(0,0,0,.08);margin-top:14px}
.info-box h2,.info-box h3{color:#8a2e30;margin-bottom:9px}
.info-box h2{font-size:1.2rem}
.info-box h3{font-size:1rem;margin-top:14px}
.info-box p,.info-box li{color:#444;margin-bottom:9px}
.info-box ul{margin-left:20px}
.info-box li{margin-bottom:6px}
.info-box a{color:#B44446}
.info-row{display:flex;flex-wrap:wrap;gap:18px}
.info-row>div{flex:1 1 340px}

/* =====================
   CHART SECTION (inner pages)
   ===================== */
.chart-section{background:#fff;border-radius:12px;padding:26px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:24px}
.chart-section h2{color:#8a2e30;font-size:1.3rem;margin-bottom:16px;border-bottom:2px solid #B44446;padding-bottom:6px}

/* =====================
   TABLES
   ===================== */
.table-wrap,.table-wrapper{overflow-x:auto;background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.08);margin-bottom:18px}
table{width:100%;border-collapse:collapse;min-width:480px}
th{background:#8a2e30;color:#fff;font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px;padding:10px 11px;text-align:center}
th:first-child{text-align:left}
td{padding:9px 11px;text-align:center;border-bottom:1px solid #eee;white-space:nowrap;font-size:.91rem}
tr:last-child td{border-bottom:none}
tr:nth-child(even){background:#fbfcfd}
tr:hover{background:#fdeaea}
td:first-child{text-align:left;font-weight:700;color:#8a2e30;position:sticky;left:0;background:inherit;min-width:120px}
.hdr td{background:#8a2e30!important;color:#fff;font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px}

/* =====================
   TIPS SECTION (inner pages)
   ===================== */
.tips-section{background:#fff;border-radius:12px;padding:26px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:24px}
.tips-section h2{color:#8a2e30;font-size:1.3rem;margin-bottom:14px;border-bottom:2px solid #B44446;padding-bottom:6px}
.tips-section ul{margin-left:20px}
.tips-section li{color:#444;margin-bottom:8px;font-size:.96rem}

/* =====================
   DISCLAIMER
   ===================== */
.disclaimer{color:#777;font-size:.88rem;margin:8px 0 20px;font-style:italic}

/* =====================
   FOOTER
   ===================== */
/* index.html */
.foot{background:#8a2e30;color:#fff;text-align:center;padding:22px 20px;margin-top:30px}
.foot a{color:#f4a3a4;text-decoration:none}
.foot a:hover{text-decoration:underline}
/* inner pages */
footer{background:#8a2e30;color:#fff;text-align:center;padding:22px 20px;margin-top:30px}
.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:12px}
.footer-nav a{color:#f4a3a4;text-decoration:none;font-size:.95rem;font-weight:600}
.footer-nav a:hover{text-decoration:underline;color:#fff}
footer p{font-size:.85rem;opacity:.8}

/* =====================
   MISC
   ===================== */
.note{color:#666;font-size:.88rem;margin-top:8px}

/* =====================
   RESPONSIVE
   ===================== */
@media(max-width:640px){
  .header-inner{flex-direction:column;align-items:flex-start;padding:0}
  .nav-toggle{display:block}
  #main-nav{display:none;width:100%}
  #main-nav.open{display:block}
  #main-nav ul{flex-direction:column;gap:4px;padding:8px 0}
  #main-nav ul li a{padding:9px 12px}
  .topnav ul{gap:5px}
  .topnav a{padding:7px 12px;font-size:.86rem}
  .conv-form,.converter-inputs{flex-direction:column;align-items:stretch}
  .form-grp select,.form-grp input,.converter-inputs select,.converter-inputs input[type="number"]{min-width:100%}
  .conv-btn,.btn{width:100%;text-align:center}
  .info-row>div{flex:1 1 100%}
  main{padding:14px 14px 30px}
}

/* ==================
   RELATED GUIDES SECTION (inner pages)
   ================== */
.related-section{background:#fff;border-radius:12px;padding:26px;box-shadow:0 2px 14px rgba(0,0,0,.08);margin-bottom:24px}
.related-section h2{color:#8a2e30;font-size:1.3rem;margin-bottom:16px;border-bottom:2px solid #B44446;padding-bottom:6px}
.related-links{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.related-links li a{display:block;background:#f5f7fa;color:#B44446;text-decoration:none;padding:10px 14px;border-radius:8px;font-size:.95rem;font-weight:600;border:1px solid #e8e0e0;transition:background .2s,color .2s,border-color .2s}
.related-links li a:hover{background:#B44446;color:#fff;border-color:#B44446}