:root {
  --bg-color: #f6f8fa;
  --card-color: #fff;
  --primary-color: #0b67ff;
  --muted-color: #666;
  --border-color: #e6e9ef;
  --shadow-color: rgba(20, 20, 50, 0.06);
  --text-color: #333;
}

body.dark-mode {
  --bg-color: #121212;
  --card-color: #1e1e1e;
  --primary-color: #5d93ff;
  --muted-color: #b0b0b0;
  --border-color: #333;
  --shadow-color: rgba(0, 0, 0, 0.5);
  --text-color: #e0e0e0;
}

body {
  font-family: 'Inter', system-ui, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 28px;
  background: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

.card {
  width: 100%;
  max-width: 760px;
  background: var(--card-color);
  box-shadow: 0 8px 30px var(--shadow-color);
  border-radius: 12px;
  padding: 22px;
  transition: background-color 0.3s;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
}


h1 {
  margin: 0;
  font-size: 20px;
}

p.lead {
  margin: 0 0 18px;
  color: var(--muted-color);
}

.row {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.input-group {
  flex: 1;
  position: relative;
}

input[type='text'],
select {
  width: 100%;
  padding: 12px 14px;
  padding-right: 40px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-size: 15px;
  box-sizing: border-box;
  background: var(--card-color);
  color: var(--text-color);
}

.clear-input {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--muted-color);
  cursor: pointer;
  font-size: 16px;
  display: none;
  padding: 0;
}

button,
a.btn {
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
}

button:hover,
a.btn:hover {
  background: #0056b3;
}

body.dark-mode button:hover,
body.dark-mode a.btn:hover {
  background: #4a7fd6;
}

.output-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}

@media (min-width: 768px) {
  .output-container {
    flex-direction: row;
    align-items: flex-start;
  }
}

.qr-box {
  width: 300px;
  height: 300px;
  background: var(--card-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
  overflow: hidden;
  padding: 10px;
}

.qr-box canvas {
  max-width: 100%;
  max-height: 100%;
}

.meta {
  flex: 1;
  text-align: left;
}

.meta .muted {
  color: var(--muted-color);
  font-size: 14px;
  margin-bottom: 5px;
}

#resultUrl {
  margin: 0 0 15px;
  word-break: break-all;
  color: var(--text-color);
  font-size: 16px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.btn-secondary {
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #ddd;
}

body.dark-mode .btn-secondary {
  background-color: var(--card-color);
  color: var(--text-color);
  border-color: var(--border-color);
}

body.dark-mode .btn-secondary:hover {
  background-color: #2a2a2a;
}

.note {
  margin-top: 15px;
  color: var(--muted-color);
  font-size: 13px;
}

#qr-placeholder {
  color: #999;
  text-align: center;
  display: block;
}

.options-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

#theme-toggle,
#language-select {
  background: var(--bg-color);
  color: var(--muted-color);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}
header .header-controls {
  display: flex;
  gap: 10px;
  align-items: center;

}

#theme-toggle:hover {
  background: #e0e0e0;
}

body.dark-mode #theme-toggle {
  background: var(--card-color);
  color: var(--muted-color);
}

body.dark-mode #theme-toggle:hover {
  background: #2a2a2a;
}