/* ==========================================================================
   Base: webfonts, typography, focus, selection, scrollbars, utilities.
   ========================================================================== */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/inter-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/inter-latin-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/inter-latin-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/inter-latin-700-normal.woff2") format("woff2");
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  color: var(--color-text);
  background: var(--color-bg);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.25;
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-page);
  font-weight: var(--weight-bold);
}

h2 {
  font-size: var(--text-2xl);
}

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

h4 {
  font-size: var(--text-md);
}

p {
  color: var(--color-text-secondary);
}

small {
  font-size: var(--text-xs);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--color-surface-secondary);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
}

/* Visible sky-blue focus indicator everywhere (spec §3.3). */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: var(--color-primary-light);
  color: var(--color-text);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-4) 0;
}

/* Scrollbars — subtle, theme-aware. */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

/* Accessibility helpers --------------------------------------------------- */

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--radius-button);
  font-weight: var(--weight-semibold);
}

.skip-link:focus {
  top: var(--space-2);
}

/* Text utilities ---------------------------------------------------------- */

.text-muted {
  color: var(--color-text-muted);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-danger {
  color: var(--color-danger);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

.font-medium {
  font-weight: var(--weight-medium);
}

.font-semibold {
  font-weight: var(--weight-semibold);
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mono {
  font-family: var(--font-mono);
}

/* Layout utilities -------------------------------------------------------- */

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.grow {
  flex: 1;
  min-width: 0;
}

.hidden {
  display: none !important;
}