:root{
  --bg: #f7f7f7;
  --card: #fff;
  --accent: aquamarine;
  --primary: #0b63ff;
  --text: #111;
}

/* Mobile-first base */
html,body{height:100%;}
body{
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  margin:0;
  padding:16px;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}

header{margin-bottom:12px}

main{display:flex;flex-direction:column;gap:16px}

aside{
  width:100%;
  background:var(--card);
  padding:12px;
  border-radius:8px;
  box-shadow:0 1px 3px rgba(0,0,0,.08);
  max-height:40vh;
  overflow:auto;
}

#scriptsList{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}

#scriptsList li{
  padding:10px;
  border-radius:6px;
  cursor:pointer;
  border:1px solid transparent;
}

#scriptsList li:hover, #scriptsList li:focus{background:#f0f8ff;outline:none;border-color:var(--accent)}

.list{border-color:var(--accent)}

#contentArea{
  width:100%;
  background:var(--card);
  padding:16px;
  border-radius:8px;
  max-height:50vh;
  overflow:auto;
  box-shadow:0 1px 3px rgba(0,0,0,.08);
  border:1px solid transparent;
}

.controls{margin-bottom:12px}

button{
  padding:10px 14px;
  border:none;
  border-radius:6px;
  background:var(--primary);
  color:#fff;
  cursor:pointer;
  font-size:16px;
}

button:disabled{opacity:.6;cursor:default}

#searchInput{width:100%;padding:10px;border-radius:6px;border:1px solid #ccc;font-size:15px}

.timer{margin-top:12px;font-size:15px;color:var(--primary);font-weight:600}

#countdown{margin-top:8px;font-weight:600;color:blueviolet}

footer{margin-top:16px;color:#666;font-size:13px}

.topic-title{font-size:18px;margin:0 0 8px}
.topic-text{white-space:pre-wrap;line-height:1.6}

/* Small screens (phones) - tighten spacing slightly */
@media (max-width: 420px){
  body{padding:12px;font-size:15px}
  button{font-size:15px;padding:10px}
}

/* Medium and up: switch to two-column layout */
@media (min-width: 600px){
  body{font-size:17px}
  main{flex-direction:row;align-items:flex-start}
  aside{flex:0 0 300px;max-height:72vh}
  #contentArea{flex:1;max-height:72vh}
  .topic-title{font-size:20px}
}

/* Wide screens: increase spacing, slightly larger type */
@media (min-width: 1024px){
  body{font-size:18px;padding:20px}
  header{margin-bottom:16px}
  main{gap:20px}
  aside{padding:16px}
  #contentArea{padding:20px}
  .topic-title{font-size:22px}
}

/* Focus states for accessibility */
a:focus, button:focus, input:focus, #scriptsList li:focus{outline:3px solid rgba(11,99,255,.18);outline-offset:2px}

/* Utility */
.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}