/*
Theme Name: YouTube Thumbnail Downloader
Theme URI: https://example.com
Author: Your Company
Author URI: https://example.com
Description: A premium, fast, SEO-friendly WordPress theme for a YouTube thumbnail downloader tool with an editorial blog. Built mobile-first with a lightweight vanilla-JS thumbnail downloader as the homepage centerpiece.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Tested up to: 6.6
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ytd
Tags: blog, e-commerce, one-column, two-columns, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

:root{
  --primary:#DD0000;
  --primary-dark:#B50000;
  --primary-50:#FDECEC;
  --ink:#141414;
  --body:#3A3A3F;
  --muted:#6B6B72;
  --bg:#FFFFFF;
  --surface:#F6F6F7;
  --surface-2:#EFEFF1;
  --border:#E7E7E9;
  --success:#15803D;
  --success-bg:#EEF8F1;
  --warning:#B45309;
  --error:#C81E1E;
  --error-bg:#FDECEC;
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(20,20,20,.06);
  --shadow:0 4px 16px rgba(20,20,20,.08);
  --shadow-lg:0 12px 32px rgba(20,20,20,.12);
  --container:1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important;}
}
body{
  margin:0;
  font-family:var(--font);
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}
img{max-width:100%; height:auto; display:block;}
a{color:inherit;}
.container{max-width:var(--container); margin:0 auto; padding:0 20px;}
h1,h2,h3,h4{color:var(--ink); margin:0 0 .5em; font-weight:800; letter-spacing:-0.02em; line-height:1.15;}
h1{font-size:clamp(2rem, 5vw, 3.4rem);}
h2{font-size:clamp(1.5rem, 3vw, 2.2rem);}
h3{font-size:1.15rem;}
p{margin:0 0 1em;}
.screen-reader-text{position:absolute !important; left:-9999px; top:-9999px;}
.skip-link{
  position:absolute; left:-9999px; top:0; background:var(--ink); color:#fff;
  padding:12px 18px; z-index:1000; border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}
button, input, textarea, select{font-family:inherit;}
:focus-visible{outline:3px solid #7CB0FF; outline-offset:2px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; height:68px;}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none; font-weight:800; color:var(--ink); font-size:1.05rem;}
.brand img{width:34px; height:34px;}
nav.primary-nav{display:none;}
nav.primary-nav ul{list-style:none; display:flex; gap:28px; margin:0; padding:0;}
nav.primary-nav a{text-decoration:none; font-weight:600; font-size:.95rem; color:var(--body);}
nav.primary-nav a:hover{color:var(--primary);}
.header-actions{display:flex; align-items:center; gap:10px;}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border-radius:999px; font-weight:700; text-decoration:none; cursor:pointer;
  border:1.5px solid transparent; transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
  min-height:44px; padding:0 20px; font-size:.95rem;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--primary); color:#fff; box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--primary-dark); color:#fff;}
.btn-ghost{background:transparent; border-color:var(--border); color:var(--ink);}
.btn-ghost:hover{background:var(--surface);}
.hamburger{
  display:inline-flex; width:44px; height:44px; align-items:center; justify-content:center;
  border-radius:10px; border:1.5px solid var(--border); background:#fff; cursor:pointer;
}
.hamburger span, .hamburger span::before, .hamburger span::after{
  content:""; display:block; width:18px; height:2px; background:var(--ink); position:relative; border-radius:2px;
}
.hamburger span::before{position:absolute; top:-6px;}
.hamburger span::after{position:absolute; top:6px;}
.mobile-nav{display:none; border-top:1px solid var(--border); background:#fff;}
.mobile-nav.open{display:block;}
.mobile-nav ul{list-style:none; margin:0; padding:8px 20px 16px;}
.mobile-nav a{display:block; padding:12px 4px; text-decoration:none; font-weight:600; color:var(--ink); border-bottom:1px solid var(--border);}
@media(min-width:900px){
  nav.primary-nav{display:block;}
  .hamburger{display:none;}
  .mobile-nav{display:none !important;}
}

/* ---------- Hero / Downloader ---------- */
.hero{padding:56px 0 40px; background:linear-gradient(180deg, #FFFFFF 0%, #FCFAFA 100%);}
.badge{
  display:inline-flex; align-items:center; gap:6px; background:var(--primary-50); color:var(--primary-dark);
  font-weight:700; font-size:.8rem; padding:7px 14px; border-radius:999px; margin-bottom:18px;
}
.hero-text{max-width:780px;}
.hero-text p.lead{margin-top:16px; font-size:1.15rem; color:var(--body); max-width:620px;}
.downloader{
  margin-top:34px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg);
  padding:22px; box-shadow:var(--shadow);
}
.downloader-form{display:flex; flex-direction:column; gap:10px;}
.input-row{display:flex; gap:10px; flex-direction:column;}
.url-input-wrap{position:relative; flex:1;}
.url-input{
  width:100%; height:56px; border-radius:var(--radius); border:1.5px solid var(--border);
  padding:0 18px; font-size:1rem; background:#fff; color:var(--ink);
}
.url-input:focus{border-color:var(--primary);}
.url-input.invalid{border-color:var(--error);}
.get-btn{height:56px; border-radius:var(--radius); padding:0 28px; font-size:1rem;}
.form-hint{font-size:.85rem; color:var(--muted); padding-left:4px; margin:0;}
.form-error{
  display:none; align-items:center; gap:8px; background:var(--error-bg); color:var(--error);
  font-weight:600; font-size:.9rem; padding:12px 14px; border-radius:10px; margin-top:2px;
}
.form-error.show{display:flex;}
@media(min-width:640px){ .input-row{flex-direction:row;} .get-btn{white-space:nowrap;} }

.result{display:none; margin-top:22px; border-top:1px solid var(--border); padding-top:22px;}
.result.show{display:block;}
.result-loading{display:none; align-items:center; gap:12px; padding:30px 0; justify-content:center; color:var(--muted); font-weight:600;}
.result-loading.show{display:flex;}
.spinner{width:22px; height:22px; border-radius:50%; border:3px solid var(--border); border-top-color:var(--primary); animation:spin .7s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}
.result-grid{display:grid; grid-template-columns:1fr; gap:20px;}
@media(min-width:760px){ .result-grid{grid-template-columns:1.3fr 1fr;} }
.preview-box{background:#fff; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; aspect-ratio:16/9; display:flex; align-items:center; justify-content:center; position:relative;}
.preview-box img{width:100%; height:100%; object-fit:cover; margin:0;}
.preview-meta{display:flex; justify-content:space-between; align-items:center; margin-top:10px; font-size:.85rem; color:var(--muted);}
.quality-list{display:flex; flex-direction:column; gap:8px;}
.quality-item{display:flex; align-items:center; justify-content:space-between; gap:10px; background:#fff; border:1.5px solid var(--border); border-radius:12px; padding:12px 14px; cursor:pointer; text-align:left; width:100%; font-size:.92rem;}
.quality-item.active{border-color:var(--primary); background:var(--primary-50);}
.quality-item .q-name{font-weight:700; color:var(--ink); display:flex; align-items:center; gap:8px;}
.quality-item .q-dim{color:var(--muted); font-size:.82rem;}
.quality-item .q-unavailable{color:var(--muted); font-size:.78rem; font-style:italic;}
.arrow-mark{width:10px; height:10px; flex:none;}
.action-row{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px;}
.action-row .btn{flex:1; min-width:140px;}
.toast{
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(20px); opacity:0;
  background:var(--ink); color:#fff; padding:12px 20px; border-radius:999px; font-weight:600; font-size:.9rem;
  transition:opacity .2s ease, transform .2s ease; z-index:200; pointer-events:none;
}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0);}

/* ---------- Sections ---------- */
section, .section{padding:64px 0;}
.section-head{max-width:640px; margin:0 auto 40px; text-align:center;}
.section-head p{color:var(--muted); margin-top:12px; font-size:1.02rem;}
.eyebrow{color:var(--primary); font-weight:800; font-size:.8rem; letter-spacing:.06em; text-transform:uppercase; margin-bottom:10px; display:block;}
.trust-strip{background:var(--surface); border-top:1px solid var(--border); border-bottom:1px solid var(--border); padding:26px 0;}
.trust-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:18px; text-align:center;}
@media(min-width:760px){.trust-grid{grid-template-columns:repeat(3,1fr);}}
@media(min-width:1000px){.trust-grid{grid-template-columns:repeat(6,1fr);}}
.trust-item{font-size:.85rem; font-weight:700; color:var(--body);}
.steps{display:grid; grid-template-columns:1fr; gap:24px;}
@media(min-width:760px){.steps{grid-template-columns:repeat(3,1fr);}}
.step-card{background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:26px;}
.step-num{width:38px; height:38px; border-radius:10px; background:var(--primary-50); color:var(--primary-dark); display:flex; align-items:center; justify-content:center; font-weight:800; margin-bottom:14px;}
.step-card p{color:var(--muted); font-size:.95rem; margin:0;}
.features{display:grid; grid-template-columns:1fr; gap:18px;}
@media(min-width:640px){.features{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1000px){.features{grid-template-columns:repeat(3,1fr);}}
.feature-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:22px;}
.feature-icon{width:38px; height:38px; border-radius:10px; background:#fff; border:1px solid var(--border); display:flex; align-items:center; justify-content:center; margin-bottom:12px; font-size:1.1rem;}
.feature-card h3{margin-bottom:6px; font-size:1.05rem;}
.feature-card p{color:var(--muted); font-size:.92rem; margin:0;}
.edu-wrap{display:grid; grid-template-columns:1fr; gap:34px;}
@media(min-width:900px){.edu-wrap{grid-template-columns:1fr 1fr;}}
table.sizes{width:100%; border-collapse:collapse; background:#fff; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; font-size:.9rem;}
table.sizes th, table.sizes td{padding:12px 14px; text-align:left; border-bottom:1px solid var(--border);}
table.sizes th{background:var(--surface); color:var(--ink); font-weight:700;}
table.sizes tr:last-child td{border-bottom:none;}
.faq-list{max-width:820px; margin:0 auto; display:flex; flex-direction:column; gap:10px;}
.faq-item{background:#fff; border:1px solid var(--border); border-radius:12px; overflow:hidden;}
.faq-q{width:100%; text-align:left; background:none; border:none; padding:18px 20px; cursor:pointer; display:flex; justify-content:space-between; align-items:center; font-weight:700; color:var(--ink); font-size:.98rem;}
.faq-q .chev{width:12px; height:12px; flex:none; transition:transform .15s ease;}
.faq-item[open] .chev{transform:rotate(180deg);}
.faq-a{padding:0 20px 18px; color:var(--body); font-size:.94rem;}
.faq-q::-webkit-details-marker{display:none;}
.cta-band{background:var(--ink); border-radius:var(--radius-lg); padding:44px 30px; text-align:center; margin:0 20px;}
.cta-band h2{color:#fff;}
.cta-band p{color:#cfcfd2; margin-top:10px;}
.cta-band .btn-primary{margin-top:20px;}

/* ---------- Blog ---------- */
.blog-header{padding:48px 0 28px; border-bottom:1px solid var(--border); background:var(--surface);}
.post-grid{display:grid; grid-template-columns:1fr; gap:26px; padding:48px 0;}
@media(min-width:700px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1000px){.post-grid{grid-template-columns:repeat(3,1fr);}}
.post-card{background:#fff; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; display:flex; flex-direction:column;}
.post-card .thumb{aspect-ratio:16/9; background:var(--surface-2); overflow:hidden;}
.post-card .thumb img{width:100%; height:100%; object-fit:cover; margin:0;}
.post-card .post-body{padding:18px; display:flex; flex-direction:column; gap:8px; flex:1;}
.post-meta{font-size:.78rem; color:var(--muted); display:flex; gap:8px; flex-wrap:wrap;}
.post-card h2, .post-card h3{font-size:1.05rem; margin:0;}
.post-card p{color:var(--muted); font-size:.9rem; margin:0;}
.post-card .read-more{margin-top:auto; font-weight:700; font-size:.88rem; color:var(--primary); text-decoration:none;}
.pagination{display:flex; gap:8px; justify-content:center; padding:20px 0 60px; flex-wrap:wrap;}
.pagination a, .pagination span{padding:10px 16px; border:1px solid var(--border); border-radius:10px; text-decoration:none; font-weight:600; font-size:.9rem; color:var(--ink);}
.pagination .current{background:var(--ink); color:#fff; border-color:var(--ink);}

/* ---------- Single post ---------- */
.article-wrap{display:grid; grid-template-columns:1fr; gap:36px; padding:44px 0 70px;}
@media(min-width:960px){.article-wrap{grid-template-columns:1fr 280px;}}
.breadcrumbs{font-size:.85rem; color:var(--muted); margin-bottom:14px;}
.breadcrumbs a{text-decoration:none; color:var(--muted);}
.breadcrumbs a:hover{color:var(--primary);}
.article-meta{display:flex; flex-wrap:wrap; gap:14px; color:var(--muted); font-size:.88rem; margin:16px 0 24px; align-items:center;}
.article-featured{border-radius:var(--radius); overflow:hidden; margin-bottom:28px; aspect-ratio:16/9; background:var(--surface-2);}
.article-featured img{width:100%; height:100%; object-fit:cover; margin:0;}
.entry-content{font-size:1.125rem; line-height:1.75; color:var(--body);}
.entry-content h2{margin-top:1.6em; font-size:1.5rem;}
.entry-content h3{margin-top:1.3em;}
.entry-content p{margin-bottom:1.2em;}
.entry-content ul, .entry-content ol{margin-bottom:1.2em; padding-left:1.4em;}
.entry-content img{border-radius:var(--radius); margin:1.2em 0;}
.entry-content blockquote{border-left:3px solid var(--primary); margin:1.4em 0; padding:.4em 0 .4em 1.2em; color:var(--muted); font-style:italic;}
.entry-content table{width:100%; border-collapse:collapse; margin:1.4em 0;}
.entry-content table th, .entry-content table td{border:1px solid var(--border); padding:10px 12px; text-align:left;}
.callout{border-radius:12px; padding:16px 18px; margin:1.4em 0; font-size:.98rem;}
.callout-tip{background:var(--success-bg); border:1px solid #C7E8D2;}
.callout-important{background:var(--primary-50); border:1px solid #F5C6C6;}
.callout-warning{background:#FDF3E7; border:1px solid #F3D9AF;}
.reading-progress{position:fixed; top:0; left:0; height:3px; background:var(--primary); width:0%; z-index:200;}
.toc-box{background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:18px;}
.toc-box h2{font-size:.85rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); margin-bottom:10px;}
.toc-box ol{margin:0; padding-left:1.1em; font-size:.9rem; display:flex; flex-direction:column; gap:8px;}
.toc-box a{text-decoration:none; color:var(--body);}
.toc-box a:hover{color:var(--primary);}
@media(min-width:960px){.article-sidebar{position:sticky; top:88px; align-self:start;}}
.author-box{display:flex; gap:14px; align-items:center; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:18px; margin:40px 0;}
.author-box img{width:52px; height:52px; border-radius:50%; margin:0;}
.author-box h3{font-size:.95rem; margin:0 0 4px;}
.author-box p{font-size:.85rem; color:var(--muted); margin:0;}
.related-posts h2{margin-bottom:20px;}

/* ---------- Generic page ---------- */
.page-content{padding:48px 0 70px;}
.page-content .entry-content{max-width:760px; margin:0 auto;}
.page-header{padding:44px 0 10px; text-align:center;}

/* ---------- 404 / Search ---------- */
.status-page{padding:90px 0; text-align:center;}
.status-page h1{font-size:2.2rem;}
.status-page p{color:var(--muted); max-width:480px; margin:14px auto 26px;}
.status-actions{display:flex; gap:12px; justify-content:center; flex-wrap:wrap;}
.search-form{display:flex; gap:10px; max-width:520px; margin:0 auto;}
.search-form input[type="search"]{flex:1; height:52px; border-radius:12px; border:1.5px solid var(--border); padding:0 16px; font-size:1rem;}
.search-form button{height:52px; border-radius:12px; padding:0 22px;}
.search-summary{color:var(--muted); margin-bottom:30px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--surface); border-top:1px solid var(--border); padding:52px 0 24px; margin-top:20px;}
.footer-grid{display:grid; grid-template-columns:1fr; gap:32px;}
@media(min-width:760px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}}
.footer-brand .brand{margin-bottom:12px;}
.footer-brand p{color:var(--muted); font-size:.9rem; max-width:280px;}
.footer-col h4{font-size:.85rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); margin-bottom:14px;}
.footer-col ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px;}
.footer-col a{text-decoration:none; font-size:.92rem; color:var(--body);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{border-top:1px solid var(--border); margin-top:36px; padding-top:20px; display:flex; flex-wrap:wrap; gap:12px; justify-content:space-between; color:var(--muted); font-size:.82rem;}
.disclaimer-note{max-width:var(--container); margin:0 auto; padding:0 20px 6px; color:var(--muted); font-size:.78rem;}

/* Ad container - reserved, no shift, empty by default */
.ad-slot{background:var(--surface); border:1px dashed var(--border); border-radius:12px; min-height:100px; display:flex; align-items:center; justify-content:center; color:var(--muted); font-size:.78rem; margin:20px 0;}