/* herdr-design-system — base/reset layer (Spec §6-16, §92).
 * Import theme.css first, then base.css, then components.
 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
}
h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.0625rem; }

p { margin: 0 0 0.75rem; }

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

code, pre, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* Visible focus ring (Spec §88 a11y) — never removed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Screen-reader-only helpers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---- buttons and tabs (one family; views add layout only, never their own button look) ----
 * .hd-btn                primary (accent fill)
 * .hd-btn--secondary     neutral: surface fill, border
 * .hd-btn--ghost         transparent with a border, secondary text
 * .hd-btn--quiet         no border until hovered (row actions, toolbars)
 * .hd-btn--danger        destructive: failed-colour text
 * .hd-btn--sm / --icon   28px high / square
 * .hd-tabs               a row of tabs: buttons (aria-selected) or radio labels (view CSS marks the selected one with .hd-tab--on)
 */
.hd-btn {
  box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: var(--control-h); padding: 0 14px; font: 500 13px/1.2 var(--font-sans);
  color: var(--text-on-accent); background: var(--accent); border: 1px solid transparent; border-radius: var(--control-radius);
  cursor: pointer; text-decoration: none; max-width: 100%; text-align: center;
}
.hd-btn[hidden], .hd-tabs[hidden] { display: none; }
.hd-btn:hover:not(:disabled):not([aria-disabled="true"]) { background: var(--accent-hover); }
.hd-btn--secondary { color: var(--text); background: var(--surface); border-color: var(--border); }
.hd-btn--secondary:hover:not(:disabled):not([aria-disabled="true"]) { background: var(--surface-hover); }
.hd-btn--ghost { color: var(--text-secondary); background: transparent; border-color: var(--border); }
.hd-btn--ghost:hover:not(:disabled):not([aria-disabled="true"]) { color: var(--text); background: var(--surface-hover); }
.hd-btn--quiet { color: var(--text-secondary); background: transparent; border-color: transparent; }
.hd-btn--quiet:hover:not(:disabled):not([aria-disabled="true"]) { color: var(--text); background: var(--surface-hover); border-color: var(--border); }
.hd-btn--danger { color: var(--status-failed); background: transparent; border-color: var(--border); }
.hd-btn--danger:hover:not(:disabled):not([aria-disabled="true"]) { background: var(--surface-hover); }
.hd-btn--sm { min-height: var(--control-h-sm); padding: 0 10px; }
.hd-btn--icon { width: var(--control-h); padding: 0; }
.hd-btn--icon.hd-btn--sm { width: var(--control-h-sm); }
.hd-btn:focus-visible, .hd-tabs > :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hd-btn:disabled, .hd-btn[aria-disabled="true"] { opacity: .55; cursor: default; }

.hd-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.hd-tabs > button, .hd-tabs > label {
  box-sizing: border-box; display: inline-block; min-height: var(--control-h); padding: 0 14px;
  font: 500 13px/calc(var(--control-h) - 2px) var(--font-sans); color: var(--text-secondary); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--control-radius); cursor: pointer; white-space: nowrap;
}
.hd-tabs > button:hover, .hd-tabs > label:hover { color: var(--text); background: var(--surface-hover); }
.hd-tabs > [aria-selected="true"], .hd-tabs > [aria-pressed="true"], .hd-tabs > .hd-tab--on {
  color: var(--text); border-color: var(--accent); box-shadow: inset 0 -2px var(--accent);
}
.hd-tabs strong, .hd-tabs small { font-weight: 500; font-size: 12px; color: var(--text-secondary); margin-left: 4px; }
@media (max-width: 900px) { .hd-btn, .hd-tabs > button, .hd-tabs > label { min-height: 44px; } .hd-tabs > button, .hd-tabs > label { line-height: 42px; } .hd-btn--sm { min-height: 44px; } .hd-btn--icon { width: 44px; } }