/* SJTUMUNC 官网 · 问卷入口样式（左下角小蓝字 + 可选轻弹窗） */

/* 常驻入口：小号蓝色文字链接，不是按钮、不带底色 */
.survey-entry {
  position: fixed;
  left: max(20px, env(safe-area-inset-left));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 15;
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  padding: 2px 0;
  color: #2f6fed;
  font: 12px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  opacity: 0.9;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.survey-entry:hover,
.survey-entry:focus-visible {
  color: #1d4ed8;
  opacity: 1;
}

.survey-entry-arrow {
  font-size: 11px;
  text-decoration: none;
  opacity: 0.75;
}

.survey-entry:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
  border-radius: 2px;
}

/* 四分钟弹窗：出现在入口上方，不遮全屏 */
.survey-popup {
  position: fixed;
  left: max(20px, env(safe-area-inset-left));
  bottom: calc(max(20px, env(safe-area-inset-bottom)) + 34px);
  z-index: 16;
  width: min(310px, calc(100vw - 40px));
  padding: 16px 16px 14px;
  border: 1px solid var(--line, #96757b44);
  border-radius: 12px;
  background: var(--fx-surface, #f5f4ef);
  color: var(--ink, #49333a);
  font: 13px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif;
  box-shadow: 0 16px 44px #0000001c;
  animation: survey-popup-in 0.3s ease both;
}

.survey-popup-title {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.survey-popup-text {
  margin: 0 0 12px;
  font-size: 12px;
  line-height: 1.65;
  opacity: 0.72;
}

.survey-popup-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.survey-popup-link {
  color: #2f6fed;
  font-size: 12px;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.survey-popup-link:hover,
.survey-popup-link:focus-visible {
  color: #1d4ed8;
}

.survey-popup-later {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 12px;
  opacity: 0.55;
  cursor: pointer;
}

.survey-popup-later:hover,
.survey-popup-later:focus-visible {
  opacity: 1;
}

.survey-popup-link:focus-visible,
.survey-popup-later:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

@keyframes survey-popup-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .survey-entry {
    left: max(12px, env(safe-area-inset-left));
    bottom: max(12px, env(safe-area-inset-bottom));
  }

  .survey-popup {
    left: max(12px, env(safe-area-inset-left));
    right: max(12px, env(safe-area-inset-right));
    bottom: calc(max(12px, env(safe-area-inset-bottom)) + 30px);
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .survey-entry {
    transition: none;
  }

  .survey-popup {
    animation: none;
  }
}

/* 页脚左侧文字链接 */
.survey-footer-link {
  justify-self: start;
  color: #2f6fed;
  font-size: 12px;
  line-height: 1.5;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  white-space: nowrap;
}

.survey-footer-link:hover,
.survey-footer-link:focus-visible {
  color: #1d4ed8;
}