/* =========================================================================
   Base: reset, document defaults, ambient background, scrollbars, focus,
   utility helpers. No component styling lives here.
   ========================================================================= */

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

* { margin: 0; }

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

body {
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: var(--lh);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambient backdrop: soft red aura over near-black, plus a faint grid. Fixed
   so it never scrolls; pointer-events:none so it never blocks input. */
.backdrop {
  position: fixed;
  inset: -32px;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background:
    linear-gradient(128deg, rgba(229, 57, 69, 0.12), transparent 30%),
    linear-gradient(308deg, rgba(110, 29, 38, 0.13), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent 42%),
    var(--bg);
  transform: translate3d(0, var(--ambient-backdrop-y, 0px), 0) scale(1.015);
  transition: background-color var(--t-slow);
  will-change: transform;
}
.backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  opacity: 0.6;
  transform: translate3d(
    var(--ambient-grid-x, 0px),
    var(--ambient-grid-y, 0px),
    0
  );
  will-change: transform;
}
.backdrop::after {
  content: "";
  position: absolute;
  width: 140%;
  height: 260px;
  top: -120px;
  left: -20%;
  background: linear-gradient(90deg, transparent 8%, rgba(229, 57, 69, 0.10) 46%, rgba(229, 57, 69, 0.16) 58%, transparent 92%);
  filter: blur(36px);
  opacity: 0.65;
  transform: rotate(-4deg) translate3d(-3%, 0, 0);
  animation: auraDrift 18s var(--ease) infinite alternate;
}
body.bg-paused .backdrop::after { animation-play-state: paused; }

@keyframes auraDrift {
  from { transform: rotate(-4deg) translate3d(calc(-3% + var(--ambient-drift-x, 0px)), var(--ambient-glow-y, 0px), 0); opacity: 0.52; }
  to { transform: rotate(-2deg) translate3d(calc(4% + var(--ambient-drift-x, 0px)), calc(28px + var(--ambient-glow-y, 0px)), 0); opacity: 0.76; }
}

/* ---- links + typography defaults */
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-weight: 650; line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
code, .mono { font-family: var(--font-mono); font-size: 0.86em; }
small { font-size: var(--fs-xs); }
button { font-family: inherit; }

/* ---- form controls: strip native chrome so styling is consistent */
input, textarea, select, button { font: inherit; color: inherit; }
textarea { resize: vertical; }
input[type="search"]::-webkit-search-cancel-button { appearance: none; }
input::placeholder, textarea::placeholder { color: var(--text-muted); }

/* ---- focus: single accessible ring everywhere, keyboard-only */
:focus { outline: none; }
:focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
  border-radius: var(--r-xs);
}

/* ---- scrollbars */
* { scrollbar-width: thin; scrollbar-color: rgba(229, 57, 69, 0.35) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.09);
  border-radius: var(--r-pill);
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(229, 57, 69, 0.5); background-clip: padding-box; }

/* ---- text helpers */
.muted { color: var(--text-2); }
.dim { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.text-red { color: var(--red-bright); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.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;
}

/* ---- visibility */
.hidden { display: none !important; }
[hidden] { display: none !important; }

/* ---- entrance helpers reused across views */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn {
  0% { opacity: 0; transform: scale(0.94); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes shimmer {
  0% { background-position: -420px 0; }
  100% { background-position: 420px 0; }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- light-theme surface fixups (backdrop + scrollbars read inverted) ---- */
:root[data-theme="light"] .backdrop {
  background:
    radial-gradient(1200px 720px at 12% -8%, rgba(229, 57, 69, 0.10), transparent 60%),
    radial-gradient(1000px 700px at 92% 4%, rgba(229, 57, 69, 0.07), transparent 62%),
    var(--bg);
}
:root[data-theme="light"] .backdrop::before {
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(20, 10, 25, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 10, 25, 0.035) 1px, transparent 1px);
}
:root[data-theme="light"] .backdrop::after { opacity: 0.4; }
:root[data-theme="light"] * { scrollbar-color: rgba(20, 10, 25, 0.22) transparent; }
:root[data-theme="light"] *::-webkit-scrollbar-thumb { background: rgba(20, 10, 25, 0.16); background-clip: padding-box; }
:root[data-theme="light"] *::-webkit-scrollbar-thumb:hover { background: rgba(229, 57, 69, 0.5); background-clip: padding-box; }