/*
Theme Name: Optipic Blog
Theme URI: https://optipic.ir/blog/
Author: Optipic
Description: Blog-only theme matching the Optipic marketing site's design system. The home page is the post archive; supports RTL and LTR automatically based on the WordPress site language.
Version: 1.0.0
Requires PHP: 7.4
License: Unlicense
Text Domain: optipic-blog
*/

:root{
  --brand-blue-700:#123d99;
  --brand-blue-600:#1857d1;
  --brand-blue-500:#1e6fef;
  --brand-cyan-500:#12b7d6;
  --brand-green-500:#22c58a;
  --brand-lime-400:#8be23a;
  --brand-lime-300:#b6f24c;

  --brand-gradient: linear-gradient(100deg, var(--brand-blue-600) 0%, var(--brand-cyan-500) 45%, var(--brand-green-500) 72%, var(--brand-lime-400) 100%);
  --brand-gradient-soft: linear-gradient(100deg, rgba(24,87,209,.10) 0%, rgba(18,183,214,.10) 45%, rgba(34,197,138,.10) 72%, rgba(139,226,58,.12) 100%);

  --ink-900:#0b1220;
  --ink-700:#33415c;
  --ink-500:#5b6b8c;
  --ink-400:#7c8aa8;
  --ink-200:#e3e8f2;
  --ink-100:#eef1f8;
  --ink-50:#f6f8fc;

  --surface:#ffffff;
  --surface-alt:#f6f8fc;
  --border:#e4e9f2;

  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-xl:32px;

  --shadow-sm: 0 1px 2px rgba(11,18,32,.06), 0 1px 1px rgba(11,18,32,.04);
  --shadow-md: 0 8px 24px rgba(11,18,32,.08), 0 2px 6px rgba(11,18,32,.05);
  --shadow-lg: 0 20px 48px rgba(18,61,153,.14), 0 6px 16px rgba(11,18,32,.06);
  --shadow-brand: 0 14px 32px rgba(30,111,239,.28);

  --container: 800px;

  --font-en: "Plus Jakarta Sans","Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --font-fa: "Vazirmatn","Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Tahoma,sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--surface);
  color:var(--ink-900);
  font-family:var(--font-en);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
html[dir="rtl"] body{ font-family:var(--font-fa); }

img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
ul,ol{ margin:0; padding:0; }
button{ font:inherit; cursor:pointer; }
h1,h2,h3,h4,h5,h6,p,figure{ margin:0; }

.container{
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:24px;
}

.gradient-text{
  background:var(--brand-gradient);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.screen-reader-text{
  position:absolute !important;
  width:1px; height:1px;
  overflow:hidden;
  clip:rect(1px,1px,1px,1px);
  white-space:nowrap;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:999px;
  font-weight:700;
  font-size:14.5px;
  border:1px solid transparent;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn:active{ transform:translateY(1px); }
.btn--ghost{
  color:var(--ink-900);
  background:#fff;
  border-color:var(--border);
}
.btn--ghost:hover{ border-color:var(--brand-blue-500); color:var(--brand-blue-600); }
.btn svg{ width:16px; height:16px; flex:none; }

html[dir="rtl"] svg.flip{ transform:scaleX(-1); }

/* ---------- Mini header ---------- */
.blog-header{
  padding:22px 0;
  border-bottom:1px solid var(--border);
}
.blog-header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.blog-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:19px;
  letter-spacing:-.02em;
}
.blog-brand .mark{ width:32px; height:32px; flex:none; }
.blog-brand .word{ background:var(--brand-gradient); -webkit-background-clip:text; background-clip:text; color:transparent; }
.blog-tagline{
  font-size:12.5px;
  font-weight:700;
  color:var(--ink-400);
  border-inline-start:1px solid var(--border);
  padding-inline-start:12px;
  margin-inline-start:2px;
}
@media (max-width:520px){ .blog-tagline{ display:none; } }

.back-to-site{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--ink-500);
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--border);
  transition:border-color .15s ease, color .15s ease;
}
.back-to-site:hover{ border-color:var(--brand-blue-500); color:var(--brand-blue-600); }
.back-to-site svg{ width:15px; height:15px; flex:none; }
html[dir="rtl"] .back-to-site svg{ transform:scaleX(-1); }

/* ---------- Page head (archive / single) ---------- */
.blog-page-head{
  padding:56px 0 8px;
}
.blog-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  color:var(--brand-blue-600);
  background:var(--brand-gradient-soft);
  padding:5px 12px;
  border-radius:999px;
  margin-bottom:16px;
}
.blog-page-head h1{
  font-size:clamp(28px,4vw,42px);
  line-height:1.15;
  letter-spacing:-.01em;
  font-weight:800;
}
.blog-page-head p{
  margin-top:12px;
  font-size:16px;
  line-height:1.7;
  color:var(--ink-500);
}

/* ---------- Post list (archive / home / search) ---------- */
.post-list{
  padding:32px 0 80px;
  display:flex;
  flex-direction:column;
  gap:0;
}
.post-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:32px 0;
  border-bottom:1px solid var(--border);
}
.post-card:first-child{ padding-top:8px; }
.post-card-thumb{
  display:block;
  border-radius:var(--radius-md);
  overflow:hidden;
  aspect-ratio:16/8.4;
  background:var(--surface-alt);
}
.post-card-thumb img{ width:100%; height:100%; object-fit:cover; transition:transform .35s ease; }
.post-card-thumb:hover img{ transform:scale(1.03); }
.post-card-meta{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--ink-400);
}
.post-card-cats{ display:flex; gap:6px; flex-wrap:wrap; }
.post-card-cat{
  font-size:12px;
  font-weight:700;
  color:var(--brand-blue-600);
  background:var(--brand-gradient-soft);
  padding:3px 10px;
  border-radius:999px;
}
.post-card h2{
  font-size:clamp(20px,2.4vw,25px);
  line-height:1.3;
  font-weight:800;
  letter-spacing:-.005em;
}
.post-card h2 a:hover{ color:var(--brand-blue-600); }
.post-card-excerpt{
  font-size:15.5px;
  line-height:1.7;
  color:var(--ink-700);
}
.post-card-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--brand-blue-600);
  width:fit-content;
}
.post-card-more svg{ width:15px; height:15px; }

.pagination{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding-bottom:80px;
  flex-wrap:wrap;
}
.pagination a,.pagination span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:40px;
  height:40px;
  padding-inline:12px;
  border-radius:999px;
  font-size:14px;
  font-weight:700;
  border:1px solid var(--border);
  color:var(--ink-700);
}
.pagination a:hover{ border-color:var(--brand-blue-500); color:var(--brand-blue-600); }
.pagination .current{
  background:var(--brand-gradient);
  color:#fff;
  border-color:transparent;
}
.pagination .dots{ border:none; color:var(--ink-400); }

.post-list-empty{
  padding:64px 0 96px;
  text-align:center;
  color:var(--ink-500);
  font-size:16px;
}

/* ---------- Single post ---------- */
.single-post{ padding:8px 0 88px; }
.single-post-head{ margin-bottom:32px; }
.single-post-head h1{
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.18;
  letter-spacing:-.01em;
  font-weight:800;
  margin-bottom:16px;
}
.single-post-meta{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  font-size:14px;
  color:var(--ink-400);
}
.single-post-meta .sep{ opacity:.5; }
.single-post-author{ display:flex; align-items:center; gap:8px; }
.single-post-author img{ width:26px; height:26px; border-radius:999px; }
.single-post-cats{ display:flex; gap:6px; flex-wrap:wrap; margin-top:14px; }
.single-post-cats a{
  font-size:12.5px;
  font-weight:700;
  color:var(--brand-blue-600);
  background:var(--brand-gradient-soft);
  padding:4px 12px;
  border-radius:999px;
}
.single-post-thumb{
  margin:28px 0 40px;
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.single-post-thumb img{ width:100%; }

/* Prose content shared by post body + pages */
.entry-content{
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-700);
  max-width:100%;
}
.entry-content > * + *{ margin-top:22px; }
.entry-content h2{
  font-size:26px;
  font-weight:800;
  letter-spacing:-.005em;
  color:var(--ink-900);
  margin-top:48px;
}
.entry-content h3{
  font-size:20px;
  font-weight:750;
  color:var(--ink-900);
  margin-top:36px;
}
.entry-content h4{
  font-size:17px;
  font-weight:750;
  color:var(--ink-900);
}
.entry-content ul,.entry-content ol{
  padding-inline-start:22px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.entry-content li{ line-height:1.75; }
.entry-content ul{ list-style:disc; }
.entry-content ol{ list-style:decimal; }
.entry-content a{
  color:var(--brand-blue-600);
  font-weight:600;
  text-decoration:underline;
  text-decoration-color:rgba(30,111,239,.35);
  text-underline-offset:3px;
}
.entry-content a:hover{ text-decoration-color:var(--brand-blue-600); }
.entry-content strong{ color:var(--ink-900); font-weight:750; }
.entry-content img,.entry-content figure{
  border-radius:var(--radius-md);
  width:100%;
}
.entry-content figcaption{
  font-size:13.5px;
  color:var(--ink-400);
  text-align:center;
  margin-top:10px;
}
.entry-content blockquote{
  border-inline-start:3px solid var(--brand-blue-500);
  padding-inline-start:20px;
  font-size:17.5px;
  font-style:italic;
  color:var(--ink-900);
}
.entry-content pre{
  background:#0f1626;
  color:#dbe4f5;
  padding:18px 20px;
  border-radius:var(--radius-md);
  overflow-x:auto;
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:13.5px;
  line-height:1.7;
}
.entry-content code{
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:.9em;
  background:var(--surface-alt);
  border:1px solid var(--border);
  border-radius:5px;
  padding:2px 6px;
}
.entry-content pre code{ background:none; border:none; padding:0; }
.entry-content hr{ border:none; border-top:1px solid var(--border); }
.entry-content table{ width:100%; border-collapse:collapse; font-size:14.5px; }
.entry-content th,.entry-content td{
  padding:10px 14px;
  border:1px solid var(--border);
  text-align:start;
}
.entry-content th{ background:var(--surface-alt); font-weight:750; }

.post-tags{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  margin-top:40px;
  padding-top:28px;
  border-top:1px solid var(--border);
}
.post-tags a{
  font-size:13px;
  font-weight:600;
  color:var(--ink-500);
  background:var(--surface-alt);
  padding:5px 12px;
  border-radius:999px;
}
.post-tags a:hover{ color:var(--brand-blue-600); }

.author-box{
  display:flex;
  gap:16px;
  align-items:flex-start;
  margin-top:40px;
  padding:24px;
  background:var(--surface-alt);
  border-radius:var(--radius-lg);
}
.author-box img{ width:56px; height:56px; border-radius:999px; flex:none; }
.author-box h3{ font-size:15.5px; font-weight:800; margin-bottom:4px; }
.author-box p{ font-size:14px; line-height:1.7; color:var(--ink-500); }

.post-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:44px;
}
.post-nav-link{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 20px;
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  min-width:0;
}
.post-nav-link:hover{ border-color:var(--brand-blue-500); }
.post-nav-link.next{ text-align:end; align-items:flex-end; }
.post-nav-label{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12.5px;
  font-weight:700;
  color:var(--ink-400);
  text-transform:uppercase;
  letter-spacing:.04em;
}
.post-nav-label svg{ width:13px; height:13px; }
.post-nav-link.next .post-nav-label{ flex-direction:row-reverse; }
.post-nav-title{
  font-size:14.5px;
  font-weight:700;
  color:var(--ink-900);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  max-width:100%;
}
@media (max-width:600px){ .post-nav{ grid-template-columns:1fr; } }

/* ---------- Related posts ---------- */
.related-posts{
  margin-top:56px;
  padding-top:44px;
  border-top:1px solid var(--border);
}
.related-posts h2{
  font-size:20px;
  font-weight:800;
  margin-bottom:22px;
}
.related-posts-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:20px;
}
.related-post-card{ display:flex; flex-direction:column; gap:10px; }
.related-post-thumb{
  display:block;
  border-radius:var(--radius-md);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--surface-alt);
}
.related-post-thumb img{ width:100%; height:100%; object-fit:cover; }
.related-post-card h3{ font-size:14.5px; font-weight:700; line-height:1.5; }
.related-post-card h3 a:hover{ color:var(--brand-blue-600); }
.related-post-date{ font-size:12.5px; color:var(--ink-400); }

/* ---------- Comments ---------- */
.comments-area{
  margin-top:56px;
  padding-top:44px;
  border-top:1px solid var(--border);
}
.comments-title{ font-size:20px; font-weight:800; margin-bottom:24px; }
.comment-list{ display:flex; flex-direction:column; gap:20px; }
.comment-list .children{ padding-inline-start:36px; margin-top:20px; display:flex; flex-direction:column; gap:20px; }
.comment-body{ display:flex; gap:14px; }
.comment-avatar{ flex:none; }
.comment-avatar img{ border-radius:999px; }
.comment-author{ font-size:14.5px; font-weight:750; }
.comment-meta{ font-size:12.5px; color:var(--ink-400); margin-top:2px; }
.comment-meta a{ color:inherit; }
.comment-content{ margin-top:10px; font-size:14.5px; line-height:1.75; color:var(--ink-700); }
.comment-reply-link{
  display:inline-block;
  margin-top:8px;
  font-size:13px;
  font-weight:700;
  color:var(--brand-blue-600);
}
.comment-respond{ margin-top:32px; }
.comment-reply-title{ font-size:17px; font-weight:800; margin-bottom:16px; }
.comment-form p{ margin-bottom:16px; }
.comment-form label{ display:block; font-size:13.5px; font-weight:700; margin-bottom:6px; }
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  font:inherit;
  font-size:14.5px;
  background:var(--surface);
  color:var(--ink-900);
}
.comment-form textarea{ min-height:130px; resize:vertical; }
.comment-form input:focus,.comment-form textarea:focus{ outline:none; border-color:var(--brand-blue-500); }
.comment-form .form-submit{ margin-bottom:0; }

/* ---------- Widgets / mini-footer ---------- */
.blog-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.7);
  padding:36px 0;
  margin-top:40px;
}
.blog-footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13.5px;
}
.blog-footer .brand{ display:flex; align-items:center; gap:8px; font-weight:800; color:#fff; }
.blog-footer .brand .mark{ width:26px; height:26px; }
.blog-footer a.footer-back{ color:rgba(255,255,255,.75); font-weight:600; }
.blog-footer a.footer-back:hover{ color:#fff; }

/* ---------- Search form ---------- */
.blog-search-form{
  display:flex;
  gap:8px;
  margin:24px 0 8px;
}
.blog-search-form input[type="search"]{
  flex:1;
  padding:12px 16px;
  border:1px solid var(--border);
  border-radius:999px;
  font:inherit;
  font-size:14.5px;
}
.blog-search-form input[type="search"]:focus{ outline:none; border-color:var(--brand-blue-500); }
.blog-search-form button{
  border:none;
  border-radius:999px;
  padding:0 20px;
  background:var(--brand-gradient);
  color:#fff;
  font-weight:700;
  display:flex;
  align-items:center;
  gap:6px;
}

@media (max-width:640px){
  .container{ padding-inline:20px; }
  .blog-page-head{ padding-top:40px; }
}