/* ==========================================================================
   Base layer — reset, typography scale, ambient visual layer, primitives
   ========================================================================== */

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

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

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  letter-spacing: var(--tracking-body);
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis-weight: none;
  overscroll-behavior-y: none;
  transition: background-color var(--dur-4) var(--ease-in-out), color var(--dur-3) var(--ease-in-out);
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: inherit;
  color: inherit;
  margin: 0;
}

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

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

svg {
  display: block;
}

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

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

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

/* ---- Scrollbars ------------------------------------------------------- */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-track {
  background: transparent;
}
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--r-full);
  border: 3px solid transparent;
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
  background-clip: content-box;
}

/* ---- Skip link -------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: var(--s3);
  left: var(--s3);
  z-index: var(--z-toast);
  padding: var(--s2) var(--s4);
  border-radius: var(--r-full);
  background: var(--surface-raised);
  border: 1px solid var(--border-strong);
  box-shadow: var(--e3);
  font-size: var(--fs-secondary);
  transform: translateY(-200%);
  transition: transform var(--dur-2) var(--ease-out);
}
.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---- Root ------------------------------------------------------------- */
.root {
  position: relative;
  z-index: var(--z-base);
  min-height: 100%;
  isolation: isolate;
}

/* ---- Ambient visual layer (restrained, never the subject) ------------- */
.ambient {
  position: fixed;
  inset: 0;
  z-index: var(--z-ambient);
  pointer-events: none;
  overflow: hidden;
}
.ambient__mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(38% 42% at var(--mesh-x, 22%) var(--mesh-y, 14%), var(--mesh-1), transparent 68%),
    radial-gradient(44% 46% at calc(100% - var(--mesh-x, 22%)) 8%, var(--mesh-2), transparent 70%),
    radial-gradient(52% 40% at 62% calc(100% - 6%), var(--mesh-3), transparent 72%);
  transform: translate3d(var(--mesh-dx, 0px), var(--mesh-dy, 0px), 0);
  transition: transform var(--dur-5) var(--ease-out);
  will-change: transform;
}
.ambient__grain {
  position: absolute;
  inset: 0;
  opacity: var(--grain-opacity);
  background-image: url("/assets/grain.svg");
  background-size: 180px 180px;
  mix-blend-mode: overlay;
}

/* ---- Boot state ------------------------------------------------------- */
.root[data-booting="true"] {
  display: grid;
  place-items: center;
  min-height: 100vh;
}
.boot {
  display: grid;
  justify-items: center;
  gap: var(--s5);
}
.boot__mark {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  background: var(--accent);
  clip-path: polygon(
    36% 0, 64% 0, 64% 36%, 100% 36%, 100% 64%, 64% 64%,
    64% 100%, 36% 100%, 36% 64%, 0 64%, 0 36%, 36% 36%
  );
  animation: boot-pulse 1.4s var(--ease-in-out) infinite;
}
.boot__text {
  font-size: var(--fs-caption);
  color: var(--text-muted);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
@keyframes boot-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1); }
}

/* ==========================================================================
   Typography primitives
   ========================================================================== */
.t-display {
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  font-weight: var(--fw-semibold);
  text-wrap: balance;
}
.t-h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--fw-semibold);
  text-wrap: balance;
}
.t-h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--fw-semibold);
}
.t-h3 {
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--fw-semibold);
}
.t-title {
  font-size: var(--fs-title);
  line-height: var(--lh-snug);
  font-weight: var(--fw-medium);
}
.t-body {
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
}
.t-secondary {
  font-size: var(--fs-secondary);
  line-height: var(--lh-normal);
  color: var(--text-secondary);
}
.t-caption {
  font-size: var(--fs-caption);
  line-height: 1.45;
  color: var(--text-muted);
}
.t-label {
  font-size: var(--fs-label);
  line-height: 1.2;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
}
.t-data {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.t-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}
.t-prose {
  max-width: var(--prose-max);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
}
.t-muted { color: var(--text-muted); }
.t-faint { color: var(--text-faint); }
.t-accent { color: var(--accent); }
.t-strong { font-weight: var(--fw-semibold); color: var(--text-primary); }

.t-clamp-1,
.t-clamp-2,
.t-clamp-3 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.t-clamp-1 { -webkit-line-clamp: 1; }
.t-clamp-2 { -webkit-line-clamp: 2; }
.t-clamp-3 { -webkit-line-clamp: 3; }

/* ==========================================================================
   Structure utilities — used sparingly, never as a layout framework.
   Each variant is self-sufficient so it can be applied on its own.
   ========================================================================== */
.stack,
.stack-1, .stack-2, .stack-3, .stack-4, .stack-5,
.stack-6, .stack-8, .stack-10, .stack-12 {
  display: grid;
  align-content: start;
  min-width: 0;
}
.stack { gap: var(--s4); }
.stack-1 { gap: var(--s1); }
.stack-2 { gap: var(--s2); }
.stack-3 { gap: var(--s3); }
.stack-4 { gap: var(--s4); }
.stack-5 { gap: var(--s5); }
.stack-6 { gap: var(--s6); }
.stack-8 { gap: var(--s8); }
.stack-10 { gap: var(--s10); }
.stack-12 { gap: var(--s12); }

.row,
.row-1, .row-2, .row-3, .row-4, .row-5, .row-6,
.row-top, .row-base, .row-wrap, .row-between, .row-end {
  display: flex;
  align-items: center;
  min-width: 0;
}
.row { gap: var(--s3); }
.row-1 { gap: var(--s1); }
.row-2 { gap: var(--s2); }
.row-3 { gap: var(--s3); }
.row-4 { gap: var(--s4); }
.row-5 { gap: var(--s5); }
.row-6 { gap: var(--s6); }

/* Modifiers carry no gap of their own, so combining them with a gap class
   (e.g. "row-2 row-wrap") preserves the intended spacing. */
.row-top { align-items: flex-start; }
.row-base { align-items: baseline; }
.row-wrap { flex-wrap: wrap; }
.row-between { justify-content: space-between; }
.row-end { justify-content: flex-end; }

.spacer { flex: 1 1 auto; min-width: 0; }
.truncate { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--border);
}
.divider-v {
  width: 1px;
  align-self: stretch;
  background: var(--border);
}

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

[hidden] { display: none !important; }
[aria-busy="true"] { cursor: progress; }