/* =========================================================================
   PromptTool.co — Clean SaaS design system
   ====================================================================== */
:root{
  --indigo:#4f46e5; --indigo-600:#4338ca; --indigo-50:#eef2ff;
  --bg:#f7f8fb; --surface:#ffffff; --surface-2:#f1f3f9;
  --text:#1a1d29; --muted:#5b6072; --border:#e4e7ef;
  --ring:rgba(79,70,229,.35);
  --shadow-sm:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --shadow-md:0 4px 12px rgba(16,24,40,.08);
  --shadow-lg:0 18px 40px -12px rgba(16,24,40,.22);
  --radius:14px; --radius-sm:10px; --maxw:1120px;
  --ok:#16a34a;
}
body.dark{
  --indigo:#818cf8; --indigo-600:#6366f1; --indigo-50:#1e1b3a;
  --bg:#0d0f17; --surface:#161924; --surface-2:#1f2330;
  --text:#e9ebf2; --muted:#9aa1b4; --border:#2a2f3e;
  --ring:rgba(129,140,248,.4);
  --shadow-lg:0 18px 40px -12px rgba(0,0,0,.6);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:var(--indigo);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:.2em 0 .5em}
h1{font-size:2.1rem}
h2{font-size:1.55rem}
h3{font-size:1.15rem}
section{margin:54px 0}

/* ---------------- Header / nav ---------------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--surface);
  background:color-mix(in srgb,var(--surface) 88%,transparent);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.15rem;color:var(--text)}
.brand:hover{text-decoration:none}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--indigo),#22d3ee);
  display:grid;place-items:center;color:#fff;font-size:1rem}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-links a,.nav-trigger{padding:8px 12px;border-radius:10px;color:var(--text);font-weight:500;
  background:none;border:0;font-size:.95rem;cursor:pointer;font-family:inherit}
.nav-links a:hover,.nav-trigger:hover{background:var(--surface-2);text-decoration:none}
.nav-spacer{flex:1}
.theme-toggle{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  background:var(--surface);cursor:pointer;font-size:1.05rem;line-height:1}
.btn-nav{background:var(--indigo)!important;color:#fff!important}
.btn-nav:hover{background:var(--indigo-600)!important}

/* dropdown */
.has-menu{position:relative}
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:560px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:14px;display:none;grid-template-columns:1fr 1fr;gap:6px}
.has-menu:hover .dropdown,.has-menu:focus-within .dropdown,.has-menu.open .dropdown{display:grid}
.dropdown .ddhead{grid-column:1/-1;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);padding:6px 10px 2px}
.dditem{display:flex;gap:10px;align-items:flex-start;padding:9px 10px;border-radius:10px;color:var(--text)}
.dditem:hover{background:var(--surface-2);text-decoration:none}
.dditem .di{font-size:1.1rem;line-height:1.3}
.dditem b{font-weight:600;font-size:.92rem;display:block}
.dditem span{font-size:.8rem;color:var(--muted)}

/* mobile */
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--border);border-radius:10px;
  background:var(--surface);font-size:1.2rem;cursor:pointer}
.mobile-menu{display:none;border-top:1px solid var(--border);background:var(--surface)}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:13px 20px;color:var(--text);border-bottom:1px solid var(--border)}
.mobile-menu .mhead{padding:14px 20px 4px;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* ---------------- Buttons ---------------- */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:12px 20px;border-radius:12px;font-weight:600;border:1px solid transparent;
  cursor:pointer;font-size:1rem;font-family:inherit;transition:transform .05s,background .15s}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--indigo);color:#fff}
.btn-primary:hover{background:var(--indigo-600)}
.btn-ghost{background:var(--surface);color:var(--text);border-color:var(--border)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-lg{padding:15px 26px;font-size:1.05rem}

/* ---------------- Hero ---------------- */
.hero{padding:70px 0 30px;text-align:center}
.hero .eyebrow{display:inline-block;background:var(--indigo-50);color:var(--indigo);
  padding:6px 14px;border-radius:999px;font-size:.82rem;font-weight:600;margin-bottom:18px}
.hero h1{font-size:2.9rem;max-width:760px;margin:0 auto .5em}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:620px;margin:0 auto 26px}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.stats{display:flex;gap:34px;justify-content:center;flex-wrap:wrap;margin-top:34px;color:var(--muted)}
.stats b{color:var(--text);font-size:1.4rem;display:block}

/* ---------------- Cards / grid ---------------- */
.grid{display:grid;gap:18px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);transition:transform .12s,box-shadow .12s,border-color .12s;
  display:block;color:var(--text)}
a.card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--indigo)}
.card .icon{width:46px;height:46px;border-radius:12px;background:var(--indigo-50);
  display:grid;place-items:center;font-size:1.4rem;margin-bottom:14px}
.card h3{margin:.1em 0 .35em}
.card p{color:var(--muted);margin:0;font-size:.95rem}
.card .tag{display:inline-block;margin-top:14px;font-size:.8rem;color:var(--indigo);font-weight:600}
.section-head{text-align:center;max-width:640px;margin:0 auto 30px}
.section-head p{color:var(--muted);font-size:1.05rem}

/* ---------------- Tool page layout ---------------- */
.tool-wrap{display:grid;grid-template-columns:1fr 300px;gap:30px;align-items:start;margin:30px 0}
.tool-head{margin:26px 0 6px}
.tool-head .crumb{font-size:.85rem;color:var(--muted);margin-bottom:8px}
.tool-head p.lead{color:var(--muted);font-size:1.1rem;max-width:720px}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.field .hint{font-weight:400;color:var(--muted);font-size:.82rem}
input[type=text],textarea,select{width:100%;padding:11px 13px;border:1px solid var(--border);
  border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font:inherit;font-size:.97rem}
textarea{min-height:120px;resize:vertical}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--indigo);box-shadow:0 0 0 3px var(--ring)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.tool-actions{display:flex;gap:10px;align-items:center;margin-top:4px}
.counter{margin-left:auto;font-size:.82rem;color:var(--muted)}

.output-box{margin-top:18px}
.output-box .out-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.output-box .out-head h3{margin:0;font-size:1rem}
.output{background:var(--surface-2);border:1px dashed var(--border);border-radius:var(--radius-sm);
  padding:16px;white-space:pre-wrap;font-size:.95rem;min-height:90px;color:var(--text)}
.output.empty{color:var(--muted)}
.copy-btn{font-size:.85rem;padding:7px 14px}
.copied{color:var(--ok)!important;border-color:var(--ok)!important}

/* sidebar */
.sidebar .panel{margin-bottom:18px}
.sidebar h4{margin:0 0 10px;font-size:.95rem}
.sidebar .related a{display:flex;gap:9px;align-items:center;padding:8px;border-radius:9px;color:var(--text)}
.sidebar .related a:hover{background:var(--surface-2);text-decoration:none}
.sidebar .related .di{font-size:1.05rem}

/* ---------------- Ads ---------------- */
.ad-slot{margin:26px 0;text-align:center}
.ad-placeholder{border:1px dashed var(--border);border-radius:var(--radius-sm);background:var(--surface-2);
  color:var(--muted);font-size:.8rem;letter-spacing:.05em;text-transform:uppercase;
  padding:26px;min-height:90px;display:grid;place-items:center}

/* ---------------- Prose / SEO body ---------------- */
.prose{max-width:760px}
.prose h2{margin-top:1.4em}
.prose p,.prose li{color:var(--text)}
.prose ul{padding-left:1.2em}
.prose li{margin:.3em 0}

/* ---------------- FAQ ---------------- */
.faq-list{max-width:780px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 18px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--indigo);font-size:1.3rem;line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-body{padding:0 18px 16px;color:var(--muted)}

/* ---------------- Template library ---------------- */
.tpl-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}
.tpl-card h3{font-size:1.05rem}
.tpl-card pre{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:14px;white-space:pre-wrap;font-size:.85rem;margin:10px 0;font-family:ui-monospace,Menlo,Consolas,monospace}
.tpl-card .copy-btn{font-size:.8rem;padding:6px 12px}
.cat-bar{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:24px}
.cat-bar button{padding:8px 16px;border-radius:999px;border:1px solid var(--border);background:var(--surface);
  color:var(--text);cursor:pointer;font:inherit;font-size:.9rem}
.cat-bar button.active{background:var(--indigo);color:#fff;border-color:var(--indigo)}

/* ---------------- Footer ---------------- */
.site-footer{background:var(--surface);border-top:1px solid var(--border);margin-top:60px;padding:50px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot-grid h5{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.foot-grid a{display:block;color:var(--text);padding:4px 0;font-size:.92rem}
.foot-grid a:hover{color:var(--indigo)}
.foot-brand p{color:var(--muted);font-size:.92rem;max-width:260px}
.foot-bottom{border-top:1px solid var(--border);margin-top:34px;padding-top:20px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.86rem}

/* ---------------- Responsive ---------------- */
@media(max-width:900px){
  .tool-wrap{grid-template-columns:1fr}
  .grid.cols-3{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .nav-links,.has-menu{display:none}
  .hamburger{display:block}
  .hero h1{font-size:2.1rem}
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  h1{font-size:1.7rem}
}