/*
Theme Name: Piston & Polish
Theme URI: https://voxevanloi.net
Author: Piston & Polish Team
Author URI: https://voxevanloi.net
Description: A clean, workshop-inspired blog theme for car care and maintenance guides. Hero search, dynamic category grid, author box. Rank Math compatible.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: piston-polish
Tags: blog, custom-menu, featured-images, threaded-comments, translation-ready, sticky-post, one-column, editor-style
*/
:root{
  --x-c1:#111827; --x-c2:#b91c1c; --x-accent:#f59e0b;
  --x-ink:#111827; --x-muted:#6b7280; --x-line:#e5e7eb; --x-bg:#f8f8f7; --x-card:#ffffff; --x-soft:#f3f2ef; --x-footbg:#0b0f19;
  --x-radius:14px; --x-shadow:0 8px 28px rgba(0,0,0,.08); --x-wrap:1140px;
  --x-serif:"Poppins","Segoe UI",Roboto,-apple-system,Arial,sans-serif; --x-sans:"Inter","Segoe UI",Roboto,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--x-bg);color:var(--x-ink);font-family:var(--x-sans);line-height:1.75;font-size:17px;}
img{max-width:100%;height:auto;}
a{color:var(--x-c2);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{font-family:var(--x-serif);font-weight:700;line-height:1.25;letter-spacing:-.3px;}
.x-wrap{max-width:var(--x-wrap);margin:0 auto;padding:0 20px;}
.site-header{background:rgba(255,255,255,.97);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid var(--x-line);position:sticky;top:0;z-index:50;}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;}
.site-brand{display:flex;align-items:center;gap:11px;font-family:var(--x-serif);font-weight:800;color:var(--x-c1);font-size:22px;text-decoration:none;}
.site-brand .logo{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--x-c1),var(--x-c2));color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;letter-spacing:.5px;}
.main-nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0;flex-wrap:wrap;}
.main-nav a{display:block;padding:8px 13px;border-radius:8px;color:var(--x-c1);font-weight:600;font-size:15px;}
.main-nav a:hover{background:var(--x-soft);text-decoration:none;}
.nav-toggle{display:none;border:1px solid var(--x-line);background:#fff;border-radius:8px;padding:8px 12px;font-size:18px;cursor:pointer;color:var(--x-c1);}
.x-hero{position:relative;background:radial-gradient(1100px 380px at 82% -10%,rgba(245,158,11,.30),transparent 60%),linear-gradient(135deg,var(--x-c1),var(--x-c2));color:#fff;border-radius:0 0 28px 28px;padding:62px 20px 52px;text-align:center;overflow:hidden;}
.x-eyebrow{display:inline-block;color:#fff;opacity:.85;font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:12.5px;margin-bottom:12px;}
.x-hero h1{color:#fff;font-size:clamp(30px,4.6vw,48px);margin:0 0 12px;letter-spacing:-.4px;}
.x-hero p{color:#fff;opacity:.92;font-size:clamp(15px,2vw,19px);max-width:660px;margin:0 auto 26px;font-family:var(--x-sans);}
.x-search{display:flex;max-width:560px;margin:0 auto;background:#fff;border-radius:12px;padding:6px;box-shadow:0 12px 34px rgba(0,0,0,.22);}
.x-search input[type=search]{flex:1;border:0;outline:0;background:transparent;font-size:16px;padding:11px 16px;color:var(--x-ink);font-family:var(--x-sans);}
.x-search button{border:0;background:linear-gradient(135deg,var(--x-accent),var(--x-c2));color:#fff;font-weight:700;padding:11px 24px;border-radius:9px;cursor:pointer;font-size:15px;}
.x-search button:hover{filter:brightness(1.07);}
.x-badges{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:20px;}
.x-badges span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);color:#fff;font-size:13px;padding:6px 13px;border-radius:999px;}
.x-sec{padding:48px 0;}
.x-h2{font-size:clamp(24px,3vw,34px);color:var(--x-c1);margin:0 0 6px;text-align:center;}
.x-sub{color:var(--x-muted);text-align:center;margin:0 auto 30px;max-width:680px;font-size:16px;}
.x-rule{width:60px;height:3px;margin:10px auto 0;border-radius:3px;background:linear-gradient(90deg,var(--x-accent),var(--x-c2));}
.x-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;}
.x-cat{display:block;background:var(--x-card);border:1px solid var(--x-line);border-radius:var(--x-radius);padding:22px 20px;color:inherit;box-shadow:var(--x-shadow);transition:transform .15s,border-color .15s,box-shadow .15s;}
.x-cat:hover{transform:translateY(-3px);border-color:var(--x-c2);text-decoration:none;box-shadow:0 14px 34px rgba(0,0,0,.12);}
.x-cat .ic{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;background:var(--x-soft);margin-bottom:14px;}
.x-cat h3{margin:0 0 4px;font-size:19px;color:var(--x-c1);}
.x-cat p{margin:0;font-size:14px;color:var(--x-muted);font-family:var(--x-sans);}
.x-feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;}
.x-feat .f{background:var(--x-card);border:1px solid var(--x-line);border-radius:var(--x-radius);padding:24px;box-shadow:var(--x-shadow);}
.x-feat .f .fi{font-size:24px;margin-bottom:8px;}
.x-feat .f b{display:block;font-family:var(--x-serif);color:var(--x-c1);font-size:18px;margin-bottom:6px;}
.x-feat .f span{color:var(--x-muted);font-size:14.5px;}
.x-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;}
.pcard{background:var(--x-card);border:1px solid var(--x-line);border-radius:var(--x-radius);overflow:hidden;box-shadow:var(--x-shadow);display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s;}
.pcard:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.12);}
.pcard .thumb{aspect-ratio:16/9;background:var(--x-soft);display:block;}
.pcard .body{padding:16px 18px 18px;}
.pcard .cat{font-size:12px;font-weight:700;color:var(--x-c2);text-transform:uppercase;letter-spacing:.5px;}
.pcard h3{margin:6px 0 8px;font-size:19px;line-height:1.35;}
.pcard h3 a{color:var(--x-c1);}
.pcard .meta{color:var(--x-muted);font-size:13px;font-family:var(--x-sans);}
.x-cta{background:radial-gradient(700px 200px at 20% 0%,rgba(245,158,11,.30),transparent 60%),linear-gradient(135deg,var(--x-c1),var(--x-c2));color:#fff;border-radius:22px;padding:42px 26px;text-align:center;overflow:hidden;}
.x-cta h2{color:#fff;margin:0 0 8px;font-size:28px;}
.x-cta p{color:#fff;opacity:.92;margin:0 0 20px;font-family:var(--x-sans);}
.x-btn{display:inline-block;background:#fff;color:var(--x-c1);font-weight:700;padding:13px 28px;border-radius:10px;}
.x-btn:hover{text-decoration:none;filter:brightness(.97);}
.article{background:#fff;border:1px solid var(--x-line);border-radius:16px;box-shadow:var(--x-shadow);padding:36px;margin:28px 0;}
.article h1.entry-title{color:var(--x-c1);font-size:clamp(27px,3.4vw,37px);margin:0 0 12px;line-height:1.22;}
.entry-meta{color:var(--x-muted);font-size:14px;margin-bottom:22px;display:flex;gap:14px;flex-wrap:wrap;align-items:center;font-family:var(--x-sans);}
.entry-meta .chip{background:var(--x-soft);color:var(--x-c1);padding:4px 11px;border-radius:999px;font-weight:600;font-size:12.5px;}
.entry-thumb{margin:0 0 24px;border-radius:12px;overflow:hidden;}
.entry-content{font-size:17px;}
.entry-content>*{margin-top:0;}
.entry-content p,.entry-content ul,.entry-content ol,.entry-content table,.entry-content figure,.entry-content blockquote{margin:0 0 1.2em;}
.entry-content h2{color:var(--x-c1);margin:1.7em 0 .5em;font-size:26px;}
.entry-content h3{color:var(--x-c2);font-size:21px;margin:1.4em 0 .4em;}
.entry-content a{color:var(--x-c2);text-decoration:underline;text-underline-offset:2px;}
.entry-content ul,.entry-content ol{padding-left:1.3em;}
.entry-content li{margin:.4em 0;}
.entry-content strong{color:var(--x-c1);}
.entry-content table{width:100%;border-collapse:collapse;font-size:15.5px;background:#fff;box-shadow:var(--x-shadow);border-radius:10px;overflow:hidden;}
.entry-content th{background:var(--x-c1);color:#fff;text-align:left;padding:11px 13px;font-family:var(--x-sans);}
.entry-content td{border-top:1px solid var(--x-line);padding:10px 13px;}
.entry-content tr:nth-child(even) td{background:var(--x-soft);}
.entry-content blockquote{border-left:4px solid var(--x-accent);background:var(--x-soft);padding:14px 20px;border-radius:0 10px 10px 0;}
#rank-math-toc,.wp-block-rank-math-toc-block{background:var(--x-soft);border:1px solid var(--x-line);border-radius:12px;padding:18px 22px;margin:0 0 1.4em;}
#rank-math-toc h2,.wp-block-rank-math-toc-block h2{margin:0 0 8px;font-size:19px;color:var(--x-c1);}
#rank-math-toc nav ul{margin:0;padding-left:1.1em;}
#rank-math-toc a{color:var(--x-c2);}
.x-authorbox{display:flex;gap:15px;align-items:flex-start;background:var(--x-soft);border:1px solid var(--x-line);border-radius:var(--x-radius);padding:20px;margin:30px 0 0;}
.x-authorbox .av{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--x-c1),var(--x-c2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:19px;flex:none;font-family:var(--x-serif);}
.x-authorbox b{color:var(--x-c1);display:block;margin-bottom:2px;font-family:var(--x-serif);font-size:17px;}
.x-authorbox p{margin:0;font-size:14px;color:var(--x-muted);font-family:var(--x-sans);}
.x-related h2{color:var(--x-c1);font-size:23px;margin:0 0 16px;}
.page-head{background:#fff;border:1px solid var(--x-line);border-radius:16px;padding:28px 30px;margin:28px 0;box-shadow:var(--x-shadow);}
.page-head h1{color:var(--x-c1);margin:0 0 6px;font-size:29px;}
.page-head p{margin:0;color:var(--x-muted);font-family:var(--x-sans);}
.x-pagination{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:26px 0 42px;}
.x-pagination a,.x-pagination span{padding:8px 14px;border-radius:9px;background:#fff;border:1px solid var(--x-line);color:var(--x-c1);font-weight:600;font-family:var(--x-sans);}
.x-pagination .current{background:var(--x-c1);color:#fff;border-color:var(--x-c1);}
.site-footer{background:var(--x-footbg);color:rgba(255,255,255,.8);margin-top:44px;}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;padding:44px 0 28px;}
.site-footer h4{color:#fff;margin:0 0 12px;font-size:17px;font-family:var(--x-serif);}
.site-footer .fbrand{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-family:var(--x-serif);font-size:20px;color:#fff;}
.site-footer .fbrand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--x-accent),var(--x-c2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;}
.site-footer a{color:rgba(255,255,255,.8);}
.site-footer a:hover{color:#fff;}
.site-footer ul{list-style:none;margin:0;padding:0;}
.site-footer li{margin:7px 0;font-size:14.5px;}
.site-footer .disc{font-size:13.5px;color:rgba(255,255,255,.6);max-width:520px;font-family:var(--x-sans);}
.site-footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.6);font-family:var(--x-sans);}
.skip-link{position:absolute;left:-9999px;}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:8px 14px;border-radius:8px;z-index:100;}
@media(max-width:860px){ .site-footer .cols{grid-template-columns:1fr;} }
@media(max-width:720px){ .nav-toggle{display:block;} .main-nav{display:none;flex-basis:100%;} .main-nav.open{display:block;} .main-nav ul{flex-direction:column;} .x-hero{padding:48px 16px 40px;} .article{padding:22px;} }

/* HERO-V2 START */
.pp-hero{position:relative;overflow:hidden;color:#fff;background:linear-gradient(180deg,#0b0f19 0%,#111827 60%,#1f2937 100%);padding:70px 20px 76px;}
.pp-carbon{position:absolute;inset:0;opacity:.55;background:repeating-linear-gradient(45deg,rgba(255,255,255,.025) 0 6px,transparent 6px 12px),repeating-linear-gradient(-45deg,rgba(0,0,0,.25) 0 6px,transparent 6px 12px);pointer-events:none;}
.pp-streak{position:absolute;left:-10%;right:-10%;top:58%;height:180px;transform:rotate(-7deg);background:linear-gradient(90deg,transparent,rgba(185,28,28,.55) 35%,rgba(245,158,11,.45) 65%,transparent);filter:blur(42px);pointer-events:none;}
.pp-inner{position:relative;max-width:1160px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center;}
.pp-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:#fbbf24;}
.pp-eyebrow i{width:34px;height:3px;background:#fbbf24;border-radius:3px;display:inline-block;}
.pp-hero h1{color:#fff;font-size:clamp(34px,5vw,58px);line-height:1.04;margin:16px 0 18px;letter-spacing:-1.2px;font-weight:800;}
.pp-hero h1 em{font-style:normal;display:block;color:#f87171;}
.pp-copy>p{color:#cbd5e1;font-size:clamp(15px,1.8vw,18px);max-width:540px;margin:0 0 28px;line-height:1.65;}
.pp-search{display:flex;align-items:center;max-width:560px;background:#fff;border-radius:12px;padding:6px 6px 6px 14px;box-shadow:0 0 0 4px rgba(245,158,11,.25),0 18px 40px rgba(0,0,0,.45);}
.pp-ico{font-size:18px;flex:none;}
.pp-search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:16px;padding:12px;color:#111827;}
.pp-search button{border:0;background:linear-gradient(135deg,#f59e0b,#d97706);color:#111827;font-weight:800;padding:12px 20px;border-radius:9px;cursor:pointer;font-size:15px;white-space:nowrap;}
.pp-search button:hover{filter:brightness(1.08);}
.pp-specs{list-style:none;display:flex;flex-wrap:wrap;gap:28px;margin:26px 0 0;padding:0;color:#94a3b8;font-size:13.5px;}
.pp-specs b{display:block;color:#fff;font-size:21px;font-weight:800;margin-bottom:2px;}
.pp-dash{background:linear-gradient(180deg,#151b27,#0d121c);border:1px solid #273244;border-radius:22px;padding:22px;box-shadow:0 30px 60px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.06);}
.pp-gauge{width:100%;max-width:330px;display:block;margin:0 auto 8px;}
.pp-needle{transform-box:view-box;transform-origin:110px 118px;transform:rotate(-30deg);animation:ppNeedle 2.4s cubic-bezier(.2,.9,.3,1.2) both;}
@keyframes ppNeedle{from{transform:rotate(-88deg)}to{transform:rotate(-30deg)}}
.pp-checks{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.pp-checks a{display:grid;grid-template-columns:auto 1fr;column-gap:10px;align-items:center;padding:12px;border-radius:12px;background:#1a2231;border:1px solid #273244;text-decoration:none;transition:border-color .15s,transform .15s;}
.pp-checks a:hover{border-color:#f59e0b;transform:translateY(-2px);}
.pp-checks span{grid-row:1/3;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;}
.pp-checks .ok{background:rgba(34,197,94,.15);color:#4ade80;}
.pp-checks .warn{background:rgba(245,158,11,.18);color:#fbbf24;}
.pp-checks b{color:#f1f5f9;font-size:14.5px;}
.pp-checks small{color:#94a3b8;font-size:12.5px;}
@media(max-width:900px){.pp-inner{grid-template-columns:1fr;gap:36px}.pp-hero{padding:48px 16px 56px}}
@media(max-width:480px){.pp-search{flex-wrap:wrap}.pp-search input{flex-basis:70%}.pp-search button{width:100%;margin-top:6px}.pp-checks{grid-template-columns:1fr}.pp-specs{gap:18px}}
/* HERO-V2 END */