:root{
  --bg:#ffffff;
  --card:#f8fafc;
  --text:#0f172a;
  --success:#10b981;
  --muted:#6b7280;
  --accent:#2563eb;
  --danger:#dc2626;
  --shadow: 0 6px 18px rgba(15,23,42,0.06);
  --radius:12px;
}
[data-theme="dark"]{
  --bg:#0b1220;
  --card:#071026;
  --text:#e6eef8;
  --success:#34d399;
  --muted:#9aa6b2;
  --accent:#60a5fa;
  --danger:#fca5a5;
  --shadow: 0 8px 24px rgba(2,6,23,0.6);
}

/* Dark theme input overrides */
[data-theme="dark"] .input-group input[type="text"],
[data-theme="dark"] .input-group select{
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
}

[data-theme="dark"] .input-group input[type="text"]:focus,
[data-theme="dark"] .input-group select:focus{
  box-shadow: 0 8px 24px rgba(96,165,250,0.08);
}

[data-theme="dark"] .theme-toggle{border-color:rgba(255,255,255,0.06);color:var(--text)}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.4;
  padding:24px 16px;
}
.site-header{
  max-width:500px;
  margin:0 auto 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.site-title{font-size:18px;margin:0;font-weight:600}
.theme-toggle{
  background:transparent;border:1px solid rgba(0,0,0,0.06);padding:8px;border-radius:8px;cursor:pointer;font-size:16px;display:inline-flex;align-items:center;color:var(--text)}
.container{max-width:500px;margin:0 auto}
.card{
  background:var(--card);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
}
.field{margin-bottom:14px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.input-group{display:flex;gap:8px}
.input-group input[type="text"]{flex:1;padding:10px 12px;border-radius:12px;border:1px solid rgba(15,23,42,0.12);background:rgba(0,0,0,0.02);color:var(--text);font-size:16px}
.input-group select{padding:10px 10px;border-radius:12px;border:1px solid rgba(15,23,42,0.12);background:rgba(0,0,0,0.02);color:var(--text);font-size:14px}
.prefix{display:inline-flex;align-items:center;padding:0 10px;border-radius:10px;background:rgba(0,0,0,0.02);color:var(--muted);font-size:14px}
.actions{margin-top:6px}
.actions button{background:var(--accent);color:white;padding:12px 14px;border-radius:10px;border:none;cursor:pointer;font-weight:600;display:block;width:100%}
.actions button:hover{filter:brightness(1.03)}
.results{margin-top:18px}
.results-title{font-size:14px;margin:0 0 10px;color:var(--muted)}
.result-row{display:flex;justify-content:space-between;padding:10px 0;border-top:1px dashed rgba(15,23,42,0.04)}
.result-row dt{color:var(--muted);font-size:13px}
.result-row dd{margin:0;font-weight:700}

/* Emphasize discounted price */
.result-row:first-of-type dd{font-size:22px;color:var(--text)}

/* Green savings */
#save{color:var(--success)}

.material-symbols-outlined{font-variation-settings: 'wght' 600; font-size:18px}

.main{
  padding-bottom: 50px;

}

/* Input focus states */
.input-group input[type="text"]:focus,
.input-group select:focus{
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(37,99,235,0.08);
}
.error{color:var(--danger);font-size:13px;margin:6px 0 0;min-height:18px}
.attribution{margin-top:12px;text-align:center;color:var(--muted);font-size:13px}

@media (max-width:420px){
  body{padding:18px 12px}
  .card{padding:16px}
  .site-title{font-size:16px}
}

/* Intro text styling */
.intro{max-width:500px;margin:0 auto 14px;text-align:center}
.intro .lead{font-size:15px;color:var(--muted);opacity:0.9;margin:0 0 6px}

@media (max-width:420px){
  .intro .lead{font-size:14px}
}

/* FAQ styles */
.faq{max-width:700px;margin:22px auto 40px}
.faq h2{font-size:16px;margin:0 0 12px;color:var(--muted)}
.faq-list details{background:var(--card);border-radius:10px;padding:12px;margin:10px 0;border:1px solid rgba(15,23,42,0.04)}
.faq-list summary{list-style:none;cursor:pointer;outline:none;display:flex;justify-content:space-between;align-items:center}
.faq-list summary h3{margin:0;font-size:14px}
.faq-icon{transition:transform .18s ease}
.faq-list details[open] .faq-icon{transform:rotate(180deg)}
.faq-body{margin-top:8px;color:var(--muted);font-size:14px}

/* Improve contrast in dark mode for select dropdown */
[data-theme="dark"] .input-group select{background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.12);color:var(--text)}

/* FAQ styles */
.faq{max-width:700px;margin:22px auto 40px}
.faq h2{font-size:16px;margin:0 0 12px;color:var(--muted)}
.faq-list details{background:var(--card);border-radius:10px;padding:12px;margin:10px 0;border:1px solid rgba(15,23,42,0.04)}
.faq-list summary{list-style:none;cursor:pointer;outline:none}
.faq-list summary h3{margin:0;font-size:14px}
.faq-body{margin-top:8px;color:var(--muted);font-size:14px}

/* Improve contrast in dark mode for select dropdown */
[data-theme="dark"] .input-group select{background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.12);color:var(--text)}