/* ============================================================
   TETHER base — reset, page atmosphere, shared primitives
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

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

body {
  font-family: var(--font-ui);
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--text-0);
  background: var(--ink-0);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* --- atmosphere: aurora wash + grain. Purposeful, not decoration:
       the wash is where the "tether line" light comes from. --- */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(58% 42% at 12% -6%, rgba(87, 224, 196, 0.075), transparent 62%),
    radial-gradient(52% 40% at 88% 108%, rgba(124, 140, 232, 0.07), transparent 60%),
    radial-gradient(40% 30% at 78% -10%, rgba(242, 169, 80, 0.045), transparent 65%),
    var(--ink-0);
}
.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
input, textarea, select { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus-visible {
  outline: 2px solid var(--st-notice);
  outline-offset: 2px;
  border-radius: var(--r-s);
}
::selection { background: rgba(124, 199, 232, 0.28); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* --- mono microcopy: timestamps, ids, diagnostics --- */
.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.01em;
  color: var(--text-2);
}

/* --- honest status chip: color + label, never color alone --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px 3px 8px;
  border-radius: var(--r-pill);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--chip-fg, var(--text-1));
  background: color-mix(in srgb, var(--chip, var(--st-idle)) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--chip, var(--st-idle)) 30%, transparent);
  white-space: nowrap;
}
.chip::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--chip, var(--st-idle));
  box-shadow: 0 0 8px color-mix(in srgb, var(--chip, var(--st-idle)) 70%, transparent);
}
.chip--pulse::before { animation: chipPulse 1.8s var(--ease-out) infinite; }
@keyframes chipPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.45); opacity: 0.55; }
}

/* --- buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: var(--fs-body);
  letter-spacing: 0.01em;
  background: var(--ink-3);
  border: 1px solid var(--ink-line-strong);
  transition: transform var(--t-fast) var(--ease-spring),
              background var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { background: #1d2438; }
.btn:active { transform: scale(0.965); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn--primary {
  background: linear-gradient(160deg, #eef3ff, #c8d6f2);
  color: #0a0e18;
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(150, 180, 240, 0.22), inset 0 1px 0 rgba(255,255,255,0.9);
}
.btn--primary:hover { background: linear-gradient(160deg, #ffffff, #d5e1f8); }

.btn--ghost { background: transparent; border-color: var(--ink-line); }
.btn--ghost:hover { background: rgba(255,255,255,0.04); }

.btn--danger-quiet {
  background: transparent;
  border-color: color-mix(in srgb, var(--st-danger) 32%, transparent);
  color: var(--st-danger);
}

/* --- solid card (long-form text always lives here, never on glass) --- */
.card {
  background: linear-gradient(180deg, var(--ink-2), #0e1322);
  border: 1px solid var(--ink-line);
  border-radius: var(--r-l);
  box-shadow: var(--shadow-1);
}

/* --- section header with thread rule --- */
.section-head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  margin: 0 0 var(--sp-3);
}
.section-head h2 {
  font-size: var(--fs-small);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-1);
  white-space: nowrap;
}
.section-head .thread-rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--rule-color, var(--ink-line-strong)), transparent);
  border-radius: 1px;
}
.section-head .count {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-2);
}

@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;
  }
}