:root{--orange:#E8642A;--orange-dark:#C84E18;--orange-pale:#FFF0E8;--dark:#0F1419;--dark-2:#1A2332;--dark-3:#243044;--text:#2C3E50;--text-light:#64748B;--text-lighter:#94A3B8;--border:#E8EDF2;--border-light:#F1F5F9;--white:#FFFFFF;--success:#10B981;--gold:#F59E0B;--radius:16px;--radius-sm:10px;--shadow:0 4px 24px rgba(15,20,25,0.07);--shadow-md:0 8px 40px rgba(15,20,25,0.11);}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'DM Sans',sans-serif;color:var(--text);background:var(--border-light);overflow-x:hidden;}

/* NAV */
nav{position:sticky;top:0;z-index:200;background:rgba(255,255,255,0.97);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:0 5%;}
.nav-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:64px;}
.nav-logo{font-family:'Sora',sans-serif;font-size:20px;font-weight:800;color:var(--dark);text-decoration:none;letter-spacing:-0.5px;}
.nav-logo span{color:var(--orange);}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none;}
.nav-links a{font-size:14px;font-weight:500;color:var(--text-light);text-decoration:none;transition:color .2s;}
.nav-links a:hover{color:var(--orange);}
.btn-ghost{padding:8px 18px;border-radius:var(--radius-sm);border:1.5px solid var(--border);font-size:13px;font-weight:500;color:var(--text);background:transparent;cursor:pointer;text-decoration:none;transition:all .2s;}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange);}
.btn-primary{padding:8px 20px;border-radius:var(--radius-sm);background:var(--orange);color:white;font-size:13px;font-weight:600;border:none;cursor:pointer;text-decoration:none;box-shadow:0 4px 10px rgba(232,100,42,0.25);transition:all .2s;display:inline-block;}
.btn-primary:hover{background:var(--orange-dark);}

/* BREADCRUMB */
.breadcrumb-custom{background:white;border-bottom:1px solid var(--border);padding:11px 5%;}
.breadcrumb-inner-custom{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-lighter);}
.breadcrumb-custom a{color:var(--text-light);text-decoration:none;}
.breadcrumb-custom a:hover{color:var(--orange);}

/* POST HERO */
.post-hero{background:linear-gradient(135deg,var(--dark) 0%,var(--dark-2) 100%);padding:52px 5%;position:relative;overflow:hidden;}
.post-hero::before{content:'';position:absolute;top:-100px;right:-50px;width:500px;height:500px;background:radial-gradient(circle,rgba(232,100,42,0.12) 0%,transparent 65%);border-radius:50%;}
.post-hero-inner{max-width:820px;margin:0 auto;position:relative;z-index:1;}
.post-cat{display:inline-block;background:rgba(232,100,42,0.15);border:1px solid rgba(232,100,42,0.3);color:#FF9A6C;padding:4px 12px;border-radius:50px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:16px;}
.post-hero h1{font-family:'Sora',sans-serif;font-size:clamp(26px,4vw,44px);font-weight:800;color:white;letter-spacing:-1.5px;line-height:1.15;margin-bottom:16px;}
.post-hero h1 em{color:var(--orange);font-style:normal;}
.post-hero-sub{font-size:16px;color:rgba(255,255,255,0.6);line-height:1.7;margin-bottom:24px;font-weight:300;}
.post-meta-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.post-author-wrap{display:flex;align-items:center;gap:10px;}
.author-av{width:36px;height:36px;border-radius:50%;background:var(--orange);display:flex;align-items:center;justify-content:center;font-weight:700;color:white;font-size:12px;flex-shrink:0;}
.author-info strong{display:block;font-size:13px;color:white;}
.author-info span{font-size:11px;color:rgba(255,255,255,0.5);}
.post-meta-item{font-size:12px;color:rgba(255,255,255,0.5);display:flex;align-items:center;gap:5px;}

/* PROGRESS BAR */
.reading-progress{position:fixed;top:64px;left:0;right:0;height:3px;background:var(--border);z-index:190;}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--orange),var(--orange-dark));width:0%;transition:width .1s;}

/* MAIN LAYOUT */
.post-layout{max-width:1280px;margin:0 auto;padding:40px 5%;display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start;}

/* TABLE OF CONTENTS */
.toc-card{background:var(--orange-pale);border:1.5px solid rgba(232,100,42,0.2);border-radius:var(--radius);padding:20px;margin-bottom:28px;}
.toc-title{font-family:'Sora',sans-serif;font-size:14px;font-weight:700;color:var(--dark);margin-bottom:14px;display:flex;align-items:center;gap:6px;}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:6px;}
.toc-list li{display:flex;align-items:flex-start;gap:8px;}
.toc-num{font-size:11px;font-weight:700;color:var(--orange);width:18px;flex-shrink:0;padding-top:2px;}
.toc-list a{font-size:13px;color:var(--text-light);text-decoration:none;line-height:1.5;transition:color .2s;}
.toc-list a:hover{color:var(--orange);}

/* ARTICLE CONTENT */
.article-content{background:white;border-radius:var(--radius);border:1.5px solid var(--border);padding:40px;line-height:1.85;}

/* Intro highlight */
.intro-highlight{background:var(--border-light);border-left:4px solid var(--orange);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:18px 20px;margin-bottom:28px;font-size:15px;color:var(--text);line-height:1.75;}
.intro-highlight strong{color:var(--dark);}

/* Typography */
.article-content h2{font-family:'Sora',sans-serif;font-size:22px;font-weight:800;color:var(--dark);letter-spacing:-0.5px;margin:36px 0 14px;padding-top:8px;}
.article-content h2:first-of-type{margin-top:0;}
.article-content h3{font-family:'Sora',sans-serif;font-size:17px;font-weight:700;color:var(--dark);margin:24px 0 10px;}
.article-content p{font-size:15px;color:var(--text-light);line-height:1.85;margin-bottom:16px;}
.article-content ul,.article-content ol{padding-left:22px;margin-bottom:16px;}
.article-content li{font-size:15px;color:var(--text-light);line-height:1.8;margin-bottom:8px;}
.article-content strong{color:var(--dark);font-weight:600;}
.article-content a{color:var(--orange);text-decoration:none;font-weight:500;}
.article-content a:hover{text-decoration:underline;}

/* Price table */
.price-table{width:100%;border-collapse:collapse;margin:20px 0 24px;border-radius:var(--radius-sm);overflow:hidden;border:1.5px solid var(--border);}
.price-table th{background:var(--dark-2);color:white;padding:12px 16px;font-size:13px;font-weight:700;text-align:left;font-family:'DM Sans',sans-serif;}
.price-table td{padding:11px 16px;font-size:14px;color:var(--text-light);border-bottom:1px solid var(--border-light);}
.price-table tr:last-child td{border-bottom:none;}
.price-table tr:nth-child(even) td{background:var(--border-light);}
.price-table .price-val{font-weight:700;color:var(--dark);}

/* Info box */
.info-box{background:var(--border-light);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px;margin:20px 0;}
.info-box.warning{background:#FEF3C7;border-color:#F59E0B;}
.info-box.tip{background:var(--orange-pale);border-color:rgba(232,100,42,0.3);}
.info-box.success{background:var(--success-light);border-color:rgba(16,185,129,0.3);}
.info-box-label{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:7px;display:flex;align-items:center;gap:6px;}
.info-box p{font-size:14px;line-height:1.7;margin:0;}

/* CTA inline */
.inline-cta{background:linear-gradient(135deg,var(--dark),var(--dark-2));border-radius:var(--radius);padding:28px;margin:28px 0;display:flex;align-items:center;gap:24px;flex-wrap:wrap;}
.inline-cta-text h4{font-family:'Sora',sans-serif;font-size:18px;font-weight:700;color:white;margin-bottom:6px;}
.inline-cta-text p{font-size:14px;color:rgba(255,255,255,0.6);margin:0;}
.inline-cta a{padding:12px 24px;background:var(--orange);color:white;border-radius:var(--radius-sm);font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap;transition:all .2s;box-shadow:0 4px 12px rgba(232,100,42,0.35);display:inline-block;}
.inline-cta a:hover{background:var(--orange-dark);}

/* Author box */
.author-box{display:flex;gap:20px;padding:24px;border:1.5px solid var(--border);border-radius:var(--radius);margin-top:32px;align-items:flex-start;}
.author-box-av{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--orange),var(--orange-dark));display:flex;align-items:center;justify-content:center;font-family:'Sora',sans-serif;font-size:22px;font-weight:800;color:white;flex-shrink:0;}
.author-box-info strong{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:var(--dark);display:block;margin-bottom:3px;}
.author-box-info span{font-size:12px;color:var(--orange);font-weight:600;display:block;margin-bottom:8px;}
.author-box-info p{font-size:13px;color:var(--text-light);line-height:1.7;margin:0;}

/* Share */
.share-row{display:flex;align-items:center;gap:10px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border-light);flex-wrap:wrap;}
.share-label{font-size:13px;font-weight:600;color:var(--text-light);}
.share-btn{padding:8px 16px;border-radius:50px;border:1.5px solid var(--border);font-size:12px;font-weight:600;cursor:pointer;background:white;color:var(--text-light);transition:all .2s;font-family:'DM Sans',sans-serif;}
.share-btn:hover{border-color:var(--orange);color:var(--orange);}

/* SIDEBAR */
.post-sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:90px;}
.scard{background:white;border-radius:var(--radius);border:1.5px solid var(--border);overflow:hidden;}
.scard-hdr{font-family:'Sora',sans-serif;font-size:14px;font-weight:700;color:var(--dark);padding:16px 18px;border-bottom:1px solid var(--border-light);}
.scard-body{padding:18px;}

/* TOC sidebar */
.toc-sidebar{display:flex;flex-direction:column;gap:4px;}
.toc-s-item{display:flex;align-items:flex-start;gap:8px;padding:6px 8px;border-radius:8px;cursor:pointer;transition:all .2s;text-decoration:none;}
.toc-s-item:hover,.toc-s-item.active{background:var(--orange-pale);}
.toc-s-item.active .toc-s-text{color:var(--orange);font-weight:600;}
.toc-s-dot{width:6px;height:6px;border-radius:50%;background:var(--border);flex-shrink:0;margin-top:6px;transition:background .2s;}
.toc-s-item.active .toc-s-dot{background:var(--orange);}
.toc-s-text{font-size:13px;color:var(--text-light);line-height:1.4;}

/* Find plumber CTA */
.find-cta{background:linear-gradient(135deg,var(--orange),var(--orange-dark));border-radius:var(--radius);padding:22px;border:none;}
.find-cta h4{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:white;margin-bottom:8px;}
.find-cta p{font-size:13px;color:rgba(255,255,255,0.75);margin-bottom:16px;line-height:1.6;}
.find-cta a{display:block;text-align:center;padding:12px;background:white;color:var(--orange-dark);border-radius:var(--radius-sm);font-size:14px;font-weight:700;text-decoration:none;transition:all .2s;}
.find-cta a:hover{background:rgba(255,255,255,0.9);}

/* Related posts */
.related-list{display:flex;flex-direction:column;gap:0;}
.related-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--border-light);text-decoration:none;transition:all .2s;}
.related-item:last-child{border-bottom:none;padding-bottom:0;}
.related-item:hover .rel-title{color:var(--orange);}
.rel-icon{width:44px;height:44px;border-radius:10px;background:var(--border-light);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;}
.rel-title{font-size:13px;font-weight:600;color:var(--dark);line-height:1.4;transition:color .2s;}
.rel-meta{font-size:11px;color:var(--text-lighter);margin-top:3px;}

/* RESPONSIVE */
@media(max-width:960px){.post-layout{grid-template-columns:1fr;}.post-sidebar{position:static;}.nav-links{display:none;}}
@media(max-width:640px){.article-content{padding:22px;}.inline-cta{flex-direction:column;gap:14px;}.author-box{flex-direction:column;}}