:root{
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success-bg: #ecfdf5;
  --success-border: #10b981;
  --error-bg: #fef2f2;
  --error-border: #ef4444;
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.page{
  min-height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 14px;
}

.container{
  width: 100%;
  max-width: 820px;
}

.banner{
  border: 1px solid var(--border);
  border-left-width: 6px;
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 14px 0;
  background: #fff;
  box-shadow: var(--shadow);
}
.banner--hidden{ display:none; }
.banner--success{
  background: var(--success-bg);
  border-color: var(--border);
  border-left-color: var(--success-border);
}
.banner--error{
  background: var(--error-bg);
  border-color: var(--border);
  border-left-color: var(--error-border);
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card__header{
  padding: 16px 18px 10px 18px;
}

.brand{
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand__logo{
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  object-fit: contain;
  display: none; /* shown when loaded */
}

.brand__name{
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .2px;
}

.brand__sub{
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

.divider{
  height: 1px;
  background: var(--border);
  margin-top: 14px;
}

.card__body{
  padding: 16px 18px 18px 18px;
}

.section{
  margin-bottom: 18px;
}

.section__title{
  font-size: 13px;
  font-weight: 700;
  color: #111827;
  text-transform: none;
  margin-bottom: 8px;
}

.section__value{
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px 0;
}

.section__hint{
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.message{
  line-height: 1.45;
  color: #111827;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 12px;
  min-height: 54px;
}

.section--hidden{ display:none; }

.response__fieldset{
  border: 0;
  padding: 0;
  margin: 0;
}

.response__options{
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.option{
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fff;
}

.option input{
  margin-top: 2px;
}

.option__label{
  display: block;
  font-weight: 600;
}

.option__desc{
  display: block;
  color: var(--muted);
  font-weight: 400;
  font-size: 12px;
  margin-top: 2px;
}

.response__actions{
  display: flex;
  gap: 10px;
  margin-top: 14px;
  align-items: center;
}

.btn{
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
  background: #fff;
}
.btn:disabled{
  opacity: .55;
  cursor: not-allowed;
}
.btn--primary{
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn--primary:hover{ background: var(--primary-hover); }
.btn--secondary{
  background: #fff;
  color: #111827;
}

.btn--hidden{ display:none; }

.footer{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* Skeleton loader */
.skeleton{
  position: relative;
  overflow: hidden;
  color: transparent;
  background: #f0f0f0;
  border-radius: 10px;
}
.skeleton::after{
  content:"";
  position:absolute;
  inset:0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, rgba(240,240,240,0) 0%, rgba(255,255,255,.7) 50%, rgba(240,240,240,0) 100%);
  animation: shimmer 1.2s infinite;
}
@keyframes shimmer{
  100%{ transform: translateX(100%); }
}