/* ==========================================================================
   BASE — reset, typography, containers, common utility primitives
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

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

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--duration-base) var(--ease-standard);
}

img, svg { max-width: 100%; display: block; }

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

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p { margin: 0 0 var(--space-3); color: var(--color-text-secondary); }

small, .text-small { font-size: var(--fs-small); }
.text-label {
  font-size: var(--fs-label);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
}
.text-muted { color: var(--color-text-muted) !important; }
.text-secondary-custom { color: var(--color-text-secondary) !important; }
.text-primary-custom { color: var(--color-primary) !important; }

button, input, select, textarea { font-family: inherit; }

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

/* Visible keyboard focus everywhere — never remove outline without replacing it */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Scrollbar (webkit) — subtle, matches surfaces */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-bg);
}

/* ---- Container ---- */
.container-app {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
@media (max-width: 576px) {
  .container-app { padding-inline: var(--space-4); }
}

/* ---- Simple utility grid (kept minimal — Bootstrap's .row/.col- handle the rest) ---- */
.stack { display: flex; flex-direction: column; }
.gap-1 { gap: var(--space-1); } .gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); } .gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.cluster { display: flex; align-items: center; }

.divider { height: 1px; background: var(--color-border); border: none; margin: var(--space-4) 0; }

/* ---- Skip link (accessibility) ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 2000;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }