* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background: linear-gradient(160deg, #6a11cb, #2575fc);
  color: #fff;
  min-height: 100vh;
}

main {
  padding: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.site-header {
  background: rgba(255,255,255,0.12);
  padding: 18px;
  text-align: center;
  border-bottom: 2px solid rgba(255,255,255,0.2);
}

.brand h1 {
  font-size: 28px;
}

.brand p {
  font-size: 14px;
  opacity: 0.8;
}

.search-input {
  width: 100%;
  padding: 14px;
  margin: 14px 0;
  border-radius: 12px;
  background: rgba(255,255,255,0.18);
  border: none;
  color: #fff;
  font-size: 16px;
  outline: none;
}

.search-input::placeholder {
  color: rgba(255,255,255,0.6);
}

/* Tool cards */
.tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}

.tool-card {
  background: rgba(255,255,255,0.22);
  border-radius: 18px;
  padding: 22px 10px;
  text-align: center;
  font-size: 30px;
  cursor: pointer;
  transition: 0.25s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.32);
}

.tool-card p {
  margin-top: 8px;
  font-size: 16px;
  font-weight: 500;
}

/* Panels */
.tool-panel {
  position: fixed;
  inset: 0;
  background: #fff;
  color: #222;
  padding: 20px;
  overflow-y: auto;
  z-index: 20;
  display: none;
}

.back-btn {
  background: transparent;
  color: #6a11cb;
  font-size: 18px;
  border: none;
  margin-bottom: 10px;
  cursor: pointer;
}

/* Inputs / buttons */
input,
select {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border-radius: 8px;
  border: 1px solid #ddd;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 14px;
  margin-top: 12px;
  border: none;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  border-radius: 10px;
  background: linear-gradient(120deg, #6a11cb, #2575fc);
  cursor: pointer;
}

.currency-select-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.fav-btn {
  background: gold;
  color: #000;
  border: none;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  font-size: 18px;
}

/* Result boxes */
.result-text {
  margin-top: 15px;
  padding: 10px;
  font-size: 15px;
  color: #111;
  border-left: 5px solid #6a11cb;
  background: #f0f8ff;
  border-radius: 4px;
}

/* Download buttons */
.download-btn {
  background: #000;
  color: #fff;
}

/* QR */
.qr-box img {
  width: 250px;
  margin-top: 15px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 20px;
  opacity: 0.7;
  margin-top: 40px;
}