/* ==========================================================================
   PT SBM — Base: reset, typography, grid/flex utilities, focus states
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 {
  margin: 0;
  line-height: var(--lh-heading);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-h1); font-weight: var(--fw-h1); }
h2 { font-size: var(--fs-h2); font-weight: var(--fw-h2); }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-h3); }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button { font-family: inherit; cursor: pointer; }

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

/* Focus visibility — never suppressed */
:focus-visible {
  outline: 2px solid var(--color-accent-500);
  outline-offset: 2px;
}

.sbm-on-dark :focus-visible {
  outline-color: var(--color-white);
}

/* Container */
.sbm-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Section spacing */
.sbm-section {
  padding-block: var(--space-12);
}

.sbm-section--tight { padding-block: var(--space-10); }

.sbm-on-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.sbm-on-dark h1, .sbm-on-dark h2, .sbm-on-dark h3 { color: var(--color-white); }
.sbm-on-dark p { color: var(--color-text-on-dark-muted); }

/* Grid / flex utilities (Bootstrap replacement, only what's used) */
.sbm-grid {
  display: grid;
  gap: var(--space-6);
}

.sbm-flex {
  display: flex;
}

.sbm-flex--wrap { flex-wrap: wrap; }
.sbm-flex--center { align-items: center; }
.sbm-flex--between { justify-content: space-between; }
.sbm-flex--gap-2 { gap: var(--space-2); }
.sbm-flex--gap-3 { gap: var(--space-3); }
.sbm-flex--gap-4 { gap: var(--space-4); }
.sbm-flex--gap-5 { gap: var(--space-5); }

.sbm-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sbm-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sbm-grid--4 { grid-template-columns: repeat(4, 1fr); }
.sbm-grid--auto-sm { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.sbm-grid--auto-md { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.sbm-grid--auto-lg { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

@media (max-width: 1024px) {
  .sbm-grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sbm-grid--2, .sbm-grid--3, .sbm-grid--4 { grid-template-columns: 1fr; }
}

/* Eyebrow label */
.sbm-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: var(--space-3);
}

.sbm-on-dark .sbm-eyebrow { color: var(--color-accent-500); }

.sbm-eyebrow::before {
  content: '';
  width: 20px;
  height: 2px;
  background: currentColor;
}

.sbm-section-head {
  max-width: 640px;
  margin-bottom: var(--space-8);
}

.sbm-section-head--center {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
}

/* Scroll reveal (JS adds .is-visible) */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}

/* Visually hidden (a11y) */
.sbm-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sbm-skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  background: var(--color-navy-950);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  z-index: 200;
  border-radius: var(--radius-md);
  transition: top var(--dur-fast) var(--ease-out);
}

.sbm-skip-link:focus {
  top: var(--space-4);
}