/*
Theme Name: PDFTools
Theme URI: https://pdftools.co.in
Author: PDFTools
Description: Custom theme for pdftools.co.in. Cobalt brand, sticky header with Tools dropdown, 3-column footer. Ships the shell only; page bodies land in later phases.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GPL-2.0-or-later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: pdftools
*/

:root{
  --brand:#1D4ED8;
  --brand-dark:#1E40AF;
  --ink:#0F172A;
  --ink-muted:#475569;
  --ink-soft:#64748B;
  --border:#E2E8F0;
  --border-soft:#F1F5F9;
  --surface:#FFFFFF;
  --surface-alt:#F8FAFC;
  --accent:#E11D48;
  --accent-dark:#BE123C;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow-md:0 6px 20px rgba(15,23,42,.08);
  --radius:10px;
  --container:1200px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  font-size:15px;
  line-height:1.6;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* skip link for accessibility */
.skip-link{
  position:absolute;left:-9999px;top:0;
  background:var(--ink);color:#fff;
  padding:10px 16px;border-radius:0 0 8px 0;z-index:100;
  font-weight:600;font-size:14px;
}
.skip-link:focus{left:0}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);
  -webkit-backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease,padding .2s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;transition:height .2s ease;
}
.site-header.scrolled .header-inner{height:60px}

.logo{
  display:inline-flex;align-items:center;
  font-weight:700;font-size:20px;color:var(--ink);
  letter-spacing:-.015em;
}

.nav{display:flex;align-items:center;gap:4px}
.nav a,.nav .nav-item{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--ink-muted);
  cursor:pointer;transition:color .15s,background .15s;
  position:relative;
}
.nav a:hover,.nav .nav-item:hover,.nav a.active{
  color:var(--ink);background:var(--surface-alt);
}

.has-dropdown{position:relative}
.caret{width:10px;height:10px;opacity:.6}
.dropdown{
  position:absolute;top:calc(100% + 6px);left:0;
  min-width:340px;background:var(--surface);
  border:1px solid var(--border);border-radius:12px;
  box-shadow:var(--shadow-md);
  padding:12px;
  opacity:0;visibility:hidden;transform:translateY(-4px);
  transition:opacity .15s,transform .15s,visibility .15s;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown{
  opacity:1;visibility:visible;transform:translateY(0);
}
.dropdown-group{padding:8px 8px 4px}
.dropdown-label{
  font-size:11px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink-soft);
  padding:0 8px 6px;
}
.dropdown a{
  display:block;padding:8px 10px;border-radius:6px;
  font-size:14px;color:var(--ink);font-weight:500;
}
.dropdown a:hover{background:var(--surface-alt);color:var(--brand)}
.dropdown a .muted{
  color:var(--ink-soft);font-size:12px;font-weight:400;margin-left:6px;
}
.dropdown hr{
  border:none;border-top:1px solid var(--border-soft);margin:6px 0;
}

.nav a.cta{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent);color:#fff;
  padding:9px 16px;border-radius:8px;
  font-size:14px;font-weight:600;
  box-shadow:0 1px 0 rgba(255,255,255,.2) inset,0 2px 8px rgba(225,29,72,.25);
  transition:background .15s,transform .05s;
}
.nav a.cta:hover{background:var(--accent-dark);color:#fff}
.nav a.cta:active{transform:translateY(1px)}
.nav a.cta svg{width:14px;height:14px}
/* CTA hidden on homepage (functions.php adds .is-home to body) */
body.is-home .nav a.cta{display:none}

.hamburger{
  display:none;background:none;border:none;
  padding:8px;cursor:pointer;color:var(--ink);
}
.hamburger svg{width:24px;height:24px}

/* body placeholder for phase 1 */
main{min-height:calc(100vh - 72px - 400px)}
.placeholder{max-width:var(--container);margin:60px auto;padding:0 24px}
.placeholder-hero{
  border:2px dashed var(--border);border-radius:16px;
  background:var(--surface-alt);
  padding:80px 32px;text-align:center;color:var(--ink-soft);
}
.placeholder-hero h2{
  font-size:22px;color:var(--ink-muted);margin:0 0 8px;font-weight:600;
}
.placeholder-hero p{margin:0;font-size:14px}

/* footer */
.site-footer{
  background:var(--surface-alt);
  border-top:1px solid var(--border);
  padding:56px 0 0;margin-top:80px;
  color:var(--ink-muted);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand .logo{margin-bottom:12px}
.footer-brand .tagline{
  font-size:14px;color:var(--ink-muted);line-height:1.55;
  max-width:260px;
}
.footer-col h4{
  font-size:11px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink-soft);
  margin:0 0 14px;
}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:8px}
.footer-col a{
  font-size:14px;color:var(--ink-muted);transition:color .15s;
}
.footer-col a:hover{color:var(--brand)}
.footer-col .soon{
  display:inline-block;margin-left:6px;
  font-size:10px;font-weight:600;
  background:var(--border);color:var(--ink-soft);
  padding:2px 6px;border-radius:4px;letter-spacing:.04em;
}
.footer-bottom{
  border-top:1px solid var(--border);
  margin-top:48px;padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-soft);
}

@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .nav{
    display:none;position:fixed;top:0;right:0;bottom:0;left:0;
    background:#fff;flex-direction:column;align-items:stretch;
    padding:80px 24px 24px;gap:2px;z-index:60;overflow-y:auto;
  }
  .nav.open{display:flex}
  .nav a,.nav .nav-item{
    padding:14px 12px;font-size:16px;border-radius:8px;
    justify-content:space-between;
  }
  .dropdown{
    position:static;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:none;background:var(--surface-alt);
    min-width:0;margin:4px 0 8px;padding:8px;
  }
  .has-dropdown .dropdown{display:none}
  .has-dropdown.open .dropdown{display:block}
  .hamburger{display:inline-flex;position:relative;z-index:70}
  .nav a.cta{padding:8px 12px;font-size:13px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}