/* Cirdz base — UI Concept v1.0 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--type-body-md);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

::selection {
  background: rgba(47, 90, 140, 0.18);
  color: var(--color-text);
}

/* —— Layout —— */
.container {
  width: 100%;
  max-width: calc(var(--content-max) + var(--margin-inline) * 2);
  margin-inline: auto;
  padding-inline: var(--margin-inline);
}

.container--wide {
  max-width: calc(var(--width-wide) + var(--margin-inline) * 2);
}

.container--standard {
  max-width: calc(var(--width-standard) + var(--margin-inline) * 2);
}

.container--narrow {
  max-width: calc(var(--width-narrow) + var(--margin-inline) * 2);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.span-12 { grid-column: span 12; }
.span-10 { grid-column: span 10; }
.span-8 { grid-column: span 8; }
.span-6 { grid-column: span 6; }
.span-4 { grid-column: span 4; }

@media (max-width: 768px) {
  .span-10,
  .span-8,
  .span-6,
  .span-4 {
    grid-column: span 12;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* —— Type —— */
.mono-label {
  font-family: var(--font-mono);
  font-size: var(--type-label);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.display-xl {
  font-family: var(--font-display);
  font-size: var(--type-display-xl);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-5);
  color: var(--color-text);
}

.display-lg {
  font-family: var(--font-display);
  font-size: var(--type-display-lg);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-4);
  color: var(--color-text);
}

.heading-md {
  font-family: var(--font-body);
  font-size: var(--type-heading-md);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
}

.heading-sm {
  font-family: var(--font-body);
  font-size: var(--type-heading-sm);
  font-weight: 500;
  line-height: 1.3;
  margin: 0 0 var(--space-2);
}

.body-lg {
  font-size: var(--type-body-lg);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0 0 var(--space-6);
  max-width: var(--width-narrow);
}

.body-md {
  font-size: var(--type-body-md);
  line-height: 1.65;
  margin: 0;
}

.body-sm {
  font-size: var(--type-body-sm);
  line-height: 1.5;
  color: var(--color-text-muted);
  margin: 0;
}

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

/* —— Sections —— */
.section {
  padding-block: var(--space-10);
}

.section--tight-top {
  padding-top: var(--space-9);
}

.section--breathing {
  padding-block: var(--space-11);
}

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

.section-head .display-lg {
  margin-bottom: var(--space-4);
}

.section-head .body-lg {
  margin-bottom: 0;
}

.surface-band {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
}

/* —— Signal Line —— */
.signal-line {
  display: block;
  width: 64px;
  height: 1px;
  background: var(--color-signal);
  margin-top: var(--space-7);
  border: 0;
}

.signal-line--full {
  width: 100%;
  background: var(--color-border);
}

.signal-line--muted {
  background: var(--color-border);
}