/* Shared UI for Educational Tools. Keep tool-specific styles in each page. */
:root {
  --edu-tools-blue: #1f6feb;
  --edu-tools-blue-dark: #174ea6;
  --edu-tools-muted: #6b7280;
  --edu-tools-border: #dfe5ec;
}

.edu-tools-global-header,
.edu-tools-global-footer {
  width: 100%;
  font-family: Arial, Helvetica, sans-serif;
}

.edu-tools-global-header {
  margin: 0 0 18px;
  padding: 0;
}

.edu-tools-global-header__inner,
.edu-tools-global-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 4px;
  padding-right: 4px;
}

.edu-tools-global-header__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--edu-tools-blue);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}

.edu-tools-global-header__back:hover,
.edu-tools-global-header__back:focus-visible {
  color: var(--edu-tools-blue-dark);
  text-decoration: underline;
}

.edu-tools-global-header__back:focus-visible {
  outline: 3px solid rgba(31, 111, 235, .22);
  outline-offset: 3px;
  border-radius: 4px;
}

.edu-tools-global-footer {
  margin-top: 28px;
  padding: 18px 16px 26px;
  color: var(--edu-tools-muted);
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
}

.edu-tools-global-footer__inner {
  padding-top: 14px;
  border-top: 1px solid var(--edu-tools-border);
}

@media (max-width: 620px) {
  .edu-tools-global-header__inner {
    padding-left: 2px;
    padding-right: 2px;
  }
  .edu-tools-global-footer {
    padding-left: 12px;
    padding-right: 12px;
  }
}

@media print {
  .edu-tools-global-header,
  .edu-tools-global-footer {
    display: none !important;
  }
}


/* Shared accessibility / UX helpers */
.edu-tools-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(31, 111, 235, .24);
  outline-offset: 2px;
}

input[disabled],
select[disabled],
button[disabled] {
  cursor: not-allowed;
  opacity: .65;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}