:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e5e7eb;
  --error: #dc2626;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  padding: 20px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

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

.logo {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: -8px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

button[type="submit"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s ease;
}

button[type="submit"]:hover {
  background: var(--accent-hover);
}

button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.link-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 4px;
}

.link-btn:hover {
  color: var(--text);
  text-decoration: underline;
}

.error {
  margin: 0;
  color: var(--error);
  font-size: 0.875rem;
}

.result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding-top: 4px;
}

#qr-image {
  width: 240px;
  height: 240px;
  image-rendering: pixelated;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.download {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.download:hover {
  text-decoration: underline;
}