/* -------------------------------------
   GLOBAL THEME VARIABLES
--------------------------------------*/
:root {
    --bg: #0d1117;
    --bg-card: #161b22;
    --text: #c9d1d9;
    --border: #30363d;
    --accent: #58a6ff;
    --btn-bg: #238636;
    --btn-bg-hover: #2ea043;
}

:root.light {
    --bg: #f7f7f7;
    --bg-card: #ffffff;
    --text: #222;
    --border: #d1d1d1;
    --accent: #0066cc;
    --btn-bg: #0b7dda;
    --btn-bg-hover: #0a6cc0;
}

/* Base */
* { box-sizing: border-box; }
body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    transition: background .3s, color .3s;
}
header {
    background: var(--bg-card);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 10;
}
nav a { color: var(--accent); margin-right: 15px; text-decoration: none; }
.container { max-width: 980px; margin: auto; padding: 20px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 20px; margin-top: 20px; transition: background .3s, border-color .3s; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
button { padding: 14px 16px; background: var(--btn-bg); color: #fff; border: none; border-radius: 6px; cursor: pointer; transition: background .2s; }
button:hover { background: var(--btn-bg-hover); }
.btn-inline { width: auto; }
pre { white-space: pre-wrap; }
footer { margin-top: 40px; padding: 20px; text-align: center; background: var(--bg-card); color: var(--text); border-top: 1px solid var(--border); }
#themeToggle { float: right; padding: 6px 14px; background: var(--btn-bg); border-radius: 6px; cursor: pointer; color: white; }
.small { color: #8b949e; font-size: 12px; }
.hero h1 { margin: 0 0 8px 0; }
.hero p { margin: 0; color: #8b949e; }
.tool-link { display: block; padding: 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-card); color: var(--text); text-decoration: none; }
.tool-link:hover { border-color: var(--accent); }
.ad-box { margin:20px 0; background:#0f1318; border:1px dashed var(--border); padding:16px; text-align:center; border-radius:8px; }