/* Public shared base (Stage 3) */
:root {
  --focus-ring: rgba(15, 127, 149, 0.45);
  --focus-ring-strong: rgba(12, 103, 122, 0.62);
  --font-size-caption: 12px;
  --font-size-body-sm: 13px;
  --font-size-body: 14px;
  --font-size-body-lg: 16px;
  --font-size-h1: clamp(24px, 3.6vw, 28px);
  --font-size-h2: clamp(20px, 3vw, 24px);
  --font-size-h3: clamp(17px, 2.4vw, 20px);
  --line-height-body: 1.45;
  --line-height-heading: 1.2;
}

html {
  font-size: 100%;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Futura", "Trebuchet MS", Arial, sans-serif;
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
}

h1,
h2,
h3 {
  line-height: var(--line-height-heading);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

a {
  text-decoration: none;
}

.skip-link {
  position: fixed;
  left: 12px;
  top: 10px;
  z-index: 4000;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #0c6c7f;
  background: linear-gradient(180deg, #178ea6 0%, #0f7f95 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: var(--font-size-body-sm);
  letter-spacing: 0.2px;
  transform: translateY(-140%);
  transition: transform 0.14s ease;
}
.skip-link:focus-visible {
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus-ring-strong);
  outline-offset: 2px;
  border-radius: 8px;
}

.page-footer {
  margin-top: 24px;
  padding: 12px 0;
  border-top: 1px solid #d9e0e6;
  text-align: center;
  color: #6b7785;
  font-size: var(--font-size-caption);
  background: transparent;
  border-radius: 0;
}

.alert {
  margin: 10px 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: var(--font-size-body);
  line-height: 1.45;
}

.alert-error {
  background: #fff1ef;
  border-color: #f5c7c0;
  color: #9f2c1f;
}

.alert-success {
  background: #e9f9f2;
  border-color: #bde6d1;
  color: #186649;
}

button:disabled,
.is-disabled {
  cursor: not-allowed !important;
  opacity: 0.72;
}

.is-loading {
  cursor: wait !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Stage 5: accessibility baseline */
button,
input,
select,
textarea {
  font: inherit;
}

button,
.tab,
.back-home,
.search-clear,
.menu-button,
.install-button,
.chip,
.drawer a,
.btn,
.btn-action {
  min-height: 44px;
}