/* =============================================================
   Base — reset, typography, layout primitives  ·  v3 "Clear Lab"
   ============================================================= */
@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@200..800&display=swap");

*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--w-body);
  line-height: var(--lh-body);
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent-strong); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--text-primary); }

/* Focus */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--dark-bg); color: var(--dark-text);
  padding: 12px 20px; z-index: 999; border-radius: 0 0 4px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; color: var(--dark-text); }

/* --- Typography --- */
h1, h2, h3, h4 {
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-display);
  text-wrap: balance;
}
h1 {
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  font-weight: var(--w-display);
  letter-spacing: var(--tr-display);
}
h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-h2);
  font-weight: var(--w-h2);
  letter-spacing: -0.026em;
}
h3 {
  font-size: var(--fs-h3);
  line-height: var(--lh-h3);
  font-weight: 600;
  letter-spacing: -0.012em;
}
h4 { font-weight: 600; letter-spacing: -0.01em; }

/* Emphasis inside headings: no italics in v3 — weight + champagne */
h1 em, h2 em, h3 em, .display-em {
  font-style: normal;
  font-weight: 500;
  color: var(--accent-strong);
}

p  { margin: 0; }
.lede {
  font-size: var(--fs-lede);
  line-height: var(--lh-lede);
  color: var(--text-secondary);
  max-width: 60ch;
  text-wrap: pretty;
}
.small { font-size: var(--fs-small); color: var(--text-muted); }

/* Label / eyebrow — wide-tracked uppercase with a hairline rule */
.eyebrow {
  font-family: var(--font-label);
  font-size: var(--fs-eyebrow);
  font-weight: var(--w-label);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
  margin: 0;
  display: flex; align-items: center; gap: 14px;
  line-height: 1.4;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px; flex: none;
  background: var(--accent);
}
.section-header--center .eyebrow { justify-content: center; }
.mono, .label {
  font-family: var(--font-label);
  font-weight: var(--w-label);
  text-transform: uppercase;
  letter-spacing: var(--tr-label);
}

/* --- Layout primitives --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--container-pad);
  width: 100%;
}
.section { padding-block: var(--section-pad-y); position: relative; }
.section--alt { background: var(--bg-alt); }
.section--muted { background: var(--bg-muted); }
.section--dark { background: var(--dark-bg); color: var(--dark-text); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--dark-text); }
.section--dark .lede { color: var(--dark-muted); }
.divider { height: 1px; background: var(--border); border: 0; margin: 0; }

/* v2 compat: grain is not part of v3 — kept as a no-op so shared markup is safe */
.grain::after { content: none; }

.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  max-width: 640px;
  margin-bottom: var(--sp-16);
}
.section-header--center { align-items: center; text-align: center; margin-inline: auto; }
.section-header--center .lede { margin-inline: auto; }

.section-header-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: var(--sp-8); margin-bottom: var(--sp-12); flex-wrap: wrap;
}
.section-header-row .section-header { margin-bottom: 0; }

/* --- Buttons — sharp, technical, ink-filled --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  height: 48px;
  padding: 0 24px;
  border-radius: var(--r-input);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  white-space: nowrap;
}
.btn--primary { background: var(--text-primary); color: #fff; }
.btn--primary:hover { background: #2B343D; color: #fff; box-shadow: var(--shadow-2); }
.btn--ghost {
  background: rgba(255,255,255,.5); color: var(--text-primary);
  border-color: var(--border-strong);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { border-color: var(--text-primary); background: rgba(255,255,255,.9); }
.btn--on-dark { background: var(--dark-text); color: var(--text-primary); }
.btn--on-dark:hover { background: #fff; color: var(--text-primary); }
.btn--sm { height: 40px; padding: 0 18px; font-size: 11.5px; letter-spacing: 0.14em; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-label);
  font-size: 11.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--text-primary);
}
.link-arrow::after {
  content: "";
  width: 22px; height: 1px; background: var(--accent);
  transition: width var(--dur) var(--ease);
}
.link-arrow:hover { color: var(--accent-strong); }
.link-arrow:hover::after { width: 36px; }

/* --- Card — glass panel --- */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.66));
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: var(--sp-8) var(--sp-6) var(--sp-6);
  box-shadow: var(--glass-edge);
  backdrop-filter: blur(8px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--glass-edge), var(--shadow-2);
}
.card__icon {
  width: 40px; height: 40px;
  border-radius: var(--r-input);
  background: var(--bg-pure);
  border: 1px solid var(--border);
  color: var(--accent-strong);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-6);
}
.card__title { font-size: 1.0625rem; margin-bottom: var(--sp-3); }
.card__body { color: var(--text-secondary); font-size: 14.5px; line-height: 1.62; }

/* --- Chips — glass pills --- */
.chip {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 22px;
  background: rgba(255,255,255,.7);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  border-radius: var(--r-pill);
  font-family: var(--font-label);
  font-size: 11.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.16em;
  backdrop-filter: blur(6px);
  box-shadow: var(--glass-edge);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.chip::before {
  content: ""; width: 16px; height: 1px; background: var(--accent); flex: none;
}
.chip:hover { border-color: var(--text-primary); background: #fff; }
.chip-group { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

/* --- Grids --- */
.grid { display: grid; gap: var(--sp-4); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1023px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 639px) {
  .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr; }
}

/* --- Fade-up on scroll --- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-slow) var(--ease-soft), transform var(--dur-slow) var(--ease-soft);
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}