/* ============================================================
   AI PROMPT HUB — public stylesheet (no external dependencies)
   ============================================================ */
:root{
  --bg:#f7f8fc; --surface:#fff; --text:#161a2b; --muted:#5a6079; --line:#e3e6f0;
  --brand:#4f46e5; --brand-dark:#3d35c4; --brand-soft:#eef0ff;
  --green:#0f8a5f; --amber:#b06f00; --red:#c23434;
  --radius:14px; --radius-sm:9px; --shadow:0 1px 2px rgba(18,20,40,.06),0 6px 20px rgba(18,20,40,.05);
  --maxw:1180px; --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .6em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.7rem,4vw,2.4rem)}
h2{font-size:clamp(1.3rem,2.6vw,1.7rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
code,pre,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-999px;top:0;background:#fff;padding:10px 16px;z-index:100}
.skip-link:focus{left:8px;top:8px}
:focus-visible{outline:3px solid #7c74ff;outline-offset:2px;border-radius:4px}

/* ------------------------------------------------------------- header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--text);font-size:1.06rem}
.brand:hover{text-decoration:none}
.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;font-weight:800}
.primary-nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.primary-nav a{display:block;padding:8px 11px;border-radius:8px;color:var(--muted);font-size:.94rem;font-weight:600}
.primary-nav a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.primary-nav a.nav-cta{background:var(--brand);color:#fff}
.primary-nav a.nav-cta:hover{background:var(--brand-dark);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:1px solid var(--line);border-radius:9px;padding:9px 10px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px}
.header-search{padding:10px 18px 12px}
.header-search form{display:flex;gap:8px;max-width:640px}
.header-search input{flex:1;padding:10px 14px;border:1px solid var(--line);border-radius:999px;font-size:.95rem;background:#fff}
.header-search button{padding:10px 20px;border:0;border-radius:999px;background:var(--brand);color:#fff;font-weight:600;cursor:pointer}
.header-search button:hover{background:var(--brand-dark)}

/* --------------------------------------------------------------- hero */
.hero{background:linear-gradient(160deg,#eef0ff 0%,#f7f8fc 65%);padding:56px 0 40px;border-bottom:1px solid var(--line)}
.hero h1{max-width:18ch}
.hero p.lead{font-size:1.1rem;color:var(--muted);max-width:60ch}
.hero-search{display:flex;gap:8px;margin:22px 0 14px;max-width:640px}
.hero-search input{flex:1;padding:14px 18px;border:1px solid var(--line);border-radius:999px;font-size:1rem}
.hero-search button{padding:14px 26px;border:0;border-radius:999px;background:var(--brand);color:#fff;font-weight:700;cursor:pointer;font-size:1rem}
.hero-search button:hover{background:var(--brand-dark)}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.hero-stats{display:flex;gap:24px;flex-wrap:wrap;margin-top:22px;color:var(--muted);font-size:.92rem}
.hero-stats strong{display:block;font-size:1.4rem;color:var(--text)}

/* ------------------------------------------------------------ buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:10px;font-weight:650;font-size:.95rem;border:1px solid transparent;cursor:pointer;background:none;text-align:center}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-block{width:100%}
.btn-lg{padding:14px 24px;font-size:1.02rem}
.btn[disabled]{opacity:.6;cursor:not-allowed}

/* -------------------------------------------------------------- layout */
.section{padding:38px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.section-head p{margin:0;color:var(--muted)}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.sidebar{position:sticky;top:80px;display:grid;gap:16px}

/* --------------------------------------------------------------- cards */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.card h3{margin:0 0 8px;font-size:1.06rem}
.card p{color:var(--muted);margin:0 0 12px;font-size:.94rem}
.card-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.82rem;margin-top:auto}
.prompt-card{display:flex;flex-direction:column;height:100%}
.prompt-card:hover{border-color:#c9cdf7;transform:translateY(-1px);transition:.15s}
.cat-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;color:var(--text)}
.cat-card:hover{border-color:var(--brand);text-decoration:none}
.cat-card strong{display:block;font-size:1rem}
.cat-card span{color:var(--muted);font-size:.85rem}

/* --------------------------------------------------------------- badges */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.75rem;font-weight:650;background:var(--brand-soft);color:var(--brand)}
.badge-green{background:#e5f6ee;color:var(--green)}
.badge-amber{background:#fdf1dd;color:var(--amber)}
.badge-grey{background:#eef0f5;color:var(--muted)}
.badge-red{background:#fceaea;color:var(--red)}
.tag-list{display:flex;flex-wrap:wrap;gap:7px;list-style:none;padding:0;margin:0}
.tag-list a{display:inline-block;padding:4px 11px;border:1px solid var(--line);border-radius:999px;font-size:.83rem;color:var(--muted);background:#fff}
.tag-list a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}

/* --------------------------------------------------------- breadcrumbs */
.breadcrumb{margin:18px 0 10px;font-size:.86rem;color:var(--muted)}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0}
.breadcrumb li+li::before{content:"›";margin-right:6px;color:#b9bed2}
.breadcrumb a{color:var(--muted)}

/* ------------------------------------------------------- prompt page */
.prompt-hero{padding-top:6px}
.prompt-hero .meta-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:12px}
.lead{font-size:1.06rem;color:var(--muted)}
.prompt-box{background:#12142a;color:#e9eaf6;border-radius:var(--radius);padding:20px;position:relative;margin:18px 0}
.prompt-box pre{margin:0;white-space:pre-wrap;word-wrap:break-word;font-size:.95rem;line-height:1.65;max-height:520px;overflow:auto}
.prompt-box .var{color:#8fe3b6}
.prompt-actions{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 6px}
.copy-btn{background:var(--brand);color:#fff;border:0}
.copy-btn.copied{background:var(--green)}
.prompt-section{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0}
.prompt-section h2{margin-top:0}
.example-box{background:#f6f7fb;border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:var(--radius-sm);padding:14px 16px;white-space:pre-wrap;font-size:.94rem}
.stat-row{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.86rem}

/* ---------------------------------------------------------- customizer */
.customizer{display:grid;gap:14px}
.field{display:grid;gap:5px}
.field label{font-weight:650;font-size:.9rem}
.field .hint{color:var(--muted);font-size:.82rem}
input[type=text],input[type=search],input[type=email],input[type=password],input[type=url],input[type=number],input[type=date],input[type=time],input[type=datetime-local],select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);font:inherit;font-size:.95rem;background:#fff;color:var(--text)}
textarea{min-height:110px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(79,70,229,.14)}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}

/* -------------------------------------------------------------- faq */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;margin-bottom:10px}
.faq summary{font-weight:650;cursor:pointer}
.faq details[open] summary{margin-bottom:8px}

/* ------------------------------------------------------------ article */
.article-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.article-body h2{margin-top:1.6em}
.article-body img{border-radius:var(--radius-sm)}
.article-body blockquote{margin:1.2em 0;padding:.6em 1.1em;border-left:3px solid var(--brand);background:#f6f7fb;color:var(--muted)}
.article-body table{width:100%;border-collapse:collapse;margin:1em 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:8px 10px;text-align:left}

/* --------------------------------------------------------- pagination */
.pagination ul{display:flex;gap:6px;list-style:none;padding:0;margin:26px 0;flex-wrap:wrap;justify-content:center}
.pagination a,.pagination .current,.pagination .gap{display:block;padding:8px 13px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:.92rem}
.pagination .current{background:var(--brand);color:#fff;border-color:var(--brand)}
.pagination .gap{border-color:transparent;background:none}

/* -------------------------------------------------------------- flash */
.flash{padding:12px 16px;border-radius:var(--radius-sm);margin:16px 0;font-size:.94rem}
.flash-success{background:#e5f6ee;color:var(--green)}
.flash-error{background:#fceaea;color:var(--red)}
.flash-info{background:var(--brand-soft);color:var(--brand)}
.notice{background:#fff8e8;border:1px solid #f2e0b5;border-radius:var(--radius-sm);padding:12px 16px;font-size:.9rem}

/* ---------------------------------------------------------------- ads */
.ad-slot{display:block;margin:26px 0;padding:8px 0;text-align:center;clear:both;position:static}
.ad-slot .ad-label{display:block;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:#9aa0b5;margin-bottom:4px}

/* ------------------------------------------------------------- footer */
.site-footer{background:#12142a;color:#c8cbdd;margin-top:50px;padding:40px 0 24px}
.site-footer a{color:#c8cbdd}
.site-footer h3{color:#fff;font-size:.95rem;text-transform:uppercase;letter-spacing:.06em}
.footer-brand{color:#fff;font-size:1.15rem}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:26px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:7px;font-size:.92rem}
.footer-bottom{border-top:1px solid #262a49;margin-top:26px;padding-top:16px;font-size:.85rem;color:#9aa0b5}

/* -------------------------------------------------------------- error */
.error-page main{padding:80px 0;text-align:center}
.error-box{max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.error-code{font-size:3.4rem;font-weight:800;color:var(--brand);margin:0}
.error-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* -------------------------------------------------------------- misc */
.empty-state{background:#fff;border:1px dashed var(--line);border-radius:var(--radius);padding:36px;text-align:center;color:var(--muted)}
.filters{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:18px}
.filters form{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;align-items:end}
.result-count{color:var(--muted);font-size:.92rem;margin-bottom:12px}
.tool-output{background:#12142a;color:#e9eaf6;border-radius:var(--radius);padding:18px;white-space:pre-wrap;min-height:80px;font-size:.95rem}
.spinner{display:inline-block;width:15px;height:15px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#12142a;color:#fff;padding:11px 20px;border-radius:999px;font-size:.9rem;z-index:90;box-shadow:var(--shadow)}

/* --------------------------------------------------------- responsive */
@media (max-width:960px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-toggle{display:flex}
  .primary-nav{display:none;width:100%;order:3;padding-bottom:10px}
  .primary-nav.open{display:block}
  .primary-nav ul{flex-direction:column;gap:2px}
  .primary-nav a{padding:11px 12px}
  .header-inner{flex-wrap:wrap}
  .hero{padding:38px 0 30px}
  .prompt-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:400px){
  .container{padding:0 14px}
  .card{padding:15px}
  .prompt-section{padding:17px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media print{.site-header,.site-footer,.ad-slot,.prompt-actions{display:none}}