/*
Theme Name: ToolBox Online
Theme URI: https://example.com/
Author: OpenAI
Description: Lightweight online tools WordPress theme with calculator tools and client-side image/PDF utilities.
Version: 1.0.0
License: GPL-2.0-or-later
Text Domain: toolbox-online
*/
:root{--primary:#2563eb;--bg:#f8fafc;--card:#fff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0}
*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:inherit;text-decoration:none}.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.container{max-width:1100px;margin:auto;padding:0 20px}.nav{display:flex;align-items:center;justify-content:space-between;min-height:68px}
.logo{font-size:22px;font-weight:800;color:var(--primary)}.menu{display:flex;gap:20px}.menu a:hover{color:var(--primary)}
.hero{text-align:center;padding:65px 20px 40px}.hero h1{font-size:42px;margin:0 0 12px}.hero p{color:var(--muted);font-size:18px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:25px 0 60px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:25px;box-shadow:0 4px 18px rgba(15,23,42,.05)}
.card h3{margin-top:0}.card p{color:var(--muted)}.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:9px;padding:11px 17px;cursor:pointer;font-weight:700}
.tool{max-width:760px;margin:50px auto 80px}.tool h1{text-align:center}.tool-box{background:#fff;border:1px solid var(--border);border-radius:16px;padding:25px;margin-top:25px}
input,select{width:100%;padding:12px;border:1px solid #cbd5e1;border-radius:8px;margin:6px 0 14px;font-size:16px}
label{font-weight:700}.result{margin-top:20px;padding:15px;background:#eff6ff;border-radius:10px;font-weight:700}
.footer{background:#0f172a;color:#cbd5e1;padding:35px 0}.footer a{margin-right:18px}
@media(max-width:800px){.grid{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:34px}.menu{display:none}}
@media(max-width:550px){.grid{grid-template-columns:1fr}.hero{padding-top:45px}}