/* Farb-/Formsprache übernommen vom Smart-Abstract-Einreichungsportal
   (portal.smart-abstract.com): Primärblau #376EA0, Helvetica-System-
   schrift, kleine Radien, dezente hellgraue Schatten, kein Orange-Akzent. */
:root {
  --sa-navy: #376ea0;
  --sa-navy-light: #4a86b8;
  --sa-orange: #376ea0;
  --sa-orange-dark: #2c5980;
  --sa-bg: #ffffff;
  --sa-bg-soft: #ffffff;
  --sa-bg-soft-2: #f7f7f7;
  --sa-text: #333333;
  --sa-text-muted: #999999;
  --sa-border: #e4e4e4;
  --sa-error: #c92b08;
  --sa-radius-lg: 2px;
  --sa-radius-md: 4px;
  --sa-radius-sm: 4px;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--sa-text);
  background: var(--sa-bg-soft);
  min-height: 100vh;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 44px 20px 32px;
}

.hero {
  text-align: center;
  margin-bottom: 30px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 14px;
  color: var(--sa-text-muted);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.back-link:hover {
  color: var(--sa-navy-light);
  text-decoration: underline;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(24px, 4vw, 30px);
  font-weight: 300;
  color: var(--sa-navy);
}

.hero p {
  margin: 0;
  color: var(--sa-text-muted);
  font-size: 15.5px;
}

.card {
  background: var(--sa-bg);
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-lg);
  padding: clamp(26px, 5vw, 36px);
  box-shadow: 0 2px 3px rgba(219, 219, 219, 1);
}

.field-label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--sa-navy);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.input-row {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--sa-text-muted);
  display: flex;
}

#url-input {
  width: 100%;
  padding: 12px 14px 12px 42px;
  font-size: 15px;
  font-family: inherit;
  color: var(--sa-text);
  background: var(--sa-bg-soft);
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-md);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#url-input::placeholder {
  color: #9fb0ba;
}

#url-input:focus {
  border-color: var(--sa-navy-light);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(55, 110, 160, 0.15);
}

#url-input.invalid {
  border-color: var(--sa-error);
}

.field-error {
  margin: 8px 2px 0;
  color: var(--sa-error);
  font-size: 13px;
}

.options-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 20px;
}

.option label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--sa-navy);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.option select {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--sa-text);
  background: var(--sa-bg-soft);
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-sm);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7a86' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  cursor: pointer;
}

.option select:focus {
  border-color: var(--sa-navy-light);
}

.btn-primary {
  width: 100%;
  margin-top: 26px;
  padding: 13px 20px;
  font-size: 15px;
  font-family: inherit;
  font-weight: 700;
  color: #ffffff;
  background: var(--sa-orange);
  border: none;
  border-radius: var(--sa-radius-md);
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn-primary:hover {
  background: var(--sa-orange-dark);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.result {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding-top: 26px;
  border-top: 1px solid var(--sa-border);
  animation: fade-up 0.3s ease;
}

.result[hidden] {
  display: none;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-label {
  margin: 0;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--sa-navy);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.qr-frame {
  padding: 16px;
  background: #ffffff;
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-md);
  line-height: 0;
}

#qr-canvas {
  display: block;
  width: 100%;
  max-width: 240px;
  height: auto;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn-secondary {
  padding: 10px 18px;
  font-size: 14px;
  font-family: inherit;
  font-weight: 700;
  color: var(--sa-navy);
  background: var(--sa-bg-soft-2);
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn-secondary:hover {
  background: #dfeaf2;
  border-color: var(--sa-navy-light);
}

.page-footer {
  margin-top: 30px;
  color: var(--sa-text-muted);
  font-size: 12.5px;
  text-align: center;
}

.page-footer a,
.page-footer a:visited,
.page-footer a:hover,
.page-footer a:active {
  color: #376ea0;
  text-decoration: none;
  font-weight: 600;
}

.page-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 420px) {
  .options-row {
    grid-template-columns: 1fr;
  }
}