/* -------------------- VARIABLES -------------------- */
:root{
  --font:"Inter",sans-serif;
  --bg:#f5f9ff;
  --card:#fff;
  --primary:#006bd6;
  --accent:#009688;
  --text:#212529;
  --muted:#6c757d;
  --radius:.75rem;
  --shadow:0 4px 12px rgba(0,0,0,.07);
  --transition:.3s ease}

/* Dark theme overrides */
[data-theme="dark"]{
  --bg:#121212;
  --card:#1e1e1e;
  --text:#e5e5e5;
  --muted:#b0b0b0;
  --shadow:0 4px 12px rgba(0,0,0,.4)}

/* -------------------- GLOBALS -------------------- */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.6}

/* -------------------- WRAPPER -------------------- */
.wrapper{display:flex;flex-direction:column;min-height:100vh}

/* -------------------- HEADER -------------------- */
header{
  background:var(--card);
  padding:1rem 1.5rem;
  box-shadow:var(--shadow);
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:sticky;
  top:0;
  z-index:10}
header h1{
  font-size:1.8rem;
  font-weight:700;
  color:var(--primary);
  margin:0}
.theme-toggle{
  background:none;
  border:none;
  cursor:pointer;
  font-size:1.6rem}

/* -------------------- MAIN CONTENT -------------------- */
.content{
  background:var(--card);
  max-width:960px;
  margin:2rem auto;
  padding:1.5rem;
  border-radius:var(--radius);
  box-shadow:var(--shadow)}
section{margin-bottom:2.5rem}
section h2{
  font-size:1.4rem;
  margin-bottom:.8rem;
  color:var(--primary);
  border-left:4px solid var(--accent);
  padding-left:.6rem}

/* -------------------- ACCORDION -------------------- */
details{
  background:var(--bg);
  border-radius:var(--radius);
  margin-bottom:.8rem;
  overflow:hidden;
  transition:background var(--transition)}
details[open]{background:var(--primary);color:#fff}
summary{
  background:var(--card);
  padding:.8rem 1rem;
  cursor:pointer;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:.5rem;
  position:relative;
  transition:background var(--transition)}
summary::marker{display:none}
summary::after{
  content:"▾";
  margin-left:auto;
  transition:transform var(--transition)}
details[open] summary::after{transform:rotate(180deg)}
details[open] summary{background:var(--primary);color:#fff}
details p,details ul,details ol{
  padding:.8rem 1rem;
  margin:0}

/* -------------------- FOOTER -------------------- */
footer{
  background:var(--card);
  border-top:1px solid #ddd;
  padding:1.5rem 0;
  margin-top:auto}
footer .container{
  max-width:960px;
  margin:auto;
  text-align:center;
  font-size:.9rem;
  color:var(--muted)}
footer .legal strong{
  display:block;
  margin-top:.8rem;
  font-weight:600;
  color:var(--text)}
footer .btn{
  display:inline-block;
  margin-top:1rem;
  padding:.6rem 1.2rem;
  background:var(--primary);
  color:#fff;
  border:none;
  border-radius:var(--radius);
  cursor:pointer;
  text-decoration:none;
  transition:background var(--transition)}
footer .btn:hover{background:#0053a5}

/* -------------------- RESPONSIVE -------------------- */
@media(max-width:600px){
  header h1{font-size:1.5rem}
}