/* ══════════════════════════════════════════════════════════════════════
   Sonar — abyssal instrument panel for DeepSeek balance
   ══════════════════════════════════════════════════════════════════════ */

:root {
  --abyss:    #04070d;
  --abyss-2:  #080e1a;
  --ink:      #e9f2f4;
  --ink-dim:  #93a7b1;
  --ink-faint:#5f727c;
  --cyan:     #48ebcd;
  --cyan-deep:#0e8f88;
  --violet:   #8f7cff;
  --amber:    #ffc24b;
  --red:      #ff6b6b;
  --hair:     rgba(150,205,215,.13);
  --hair-2:   rgba(150,205,215,.07);
  --glass:    rgba(255,255,255,.038);
  --glass-2:  rgba(255,255,255,.014);

  --display: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --ui: 'Chivo', -apple-system, system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --pad: 1.25rem;
  --r-card: 1.375rem;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* author display rules must never defeat the hidden attribute */
[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--abyss);
}

body {
  font: 400 1rem/1.5 var(--ui);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
  touch-action: manipulation;
}

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: var(--cyan); text-decoration-color: rgba(72,235,205,.35); text-underline-offset: .2em; }
code { font: 400 .8em/1 var(--mono); color: var(--ink-dim); }
em { font-style: normal; font-family: var(--display); font-size: 1.08em; }

/* ── depth backdrop ─────────────────────────────────────────────────── */
.depth { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.depth__glow {
  position: absolute; inset: -20% -20% auto -20%; height: 90%;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(14,143,136,.28), transparent 70%),
    radial-gradient(40% 40% at 85% 18%, rgba(143,124,255,.14), transparent 70%);
  filter: blur(6px);
}
.depth__rings {
  position: absolute; left: 50%; top: 2rem; width: 160vmax; aspect-ratio: 1;
  transform: translateX(-50%);
  background:
    radial-gradient(circle, transparent 0 22%, var(--hair-2) 22% calc(22% + 1px), transparent calc(22% + 1px) 34%,
      var(--hair-2) 34% calc(34% + 1px), transparent calc(34% + 1px) 48%,
      var(--hair-2) 48% calc(48% + 1px), transparent calc(48% + 1px));
  opacity: .8;
  mask-image: linear-gradient(to bottom, #000 0 30%, transparent 72%);
}
.depth__grain {
  position: absolute; inset: 0; opacity: .16; mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── shared atoms ───────────────────────────────────────────────────── */
.label {
  margin: 0; font: 500 .6875rem/1 var(--ui);
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint);
}
.micro { margin: .75rem 0 0; font-size: .75rem; line-height: 1.55; color: var(--ink-faint); }
.line { margin: .5rem 0 0; font-size: .875rem; color: var(--ink-dim); }

.pill {
  font: 500 .6875rem/1 var(--ui); letter-spacing: .08em; text-transform: uppercase;
  padding: .375rem .5rem; border-radius: .5rem;
  border: 1px solid var(--hair); color: var(--ink-dim);
  background: rgba(255,255,255,.03); white-space: nowrap;
}
.pill--ok    { color: var(--cyan);   border-color: rgba(72,235,205,.32);  background: rgba(72,235,205,.09); }
.pill--warn  { color: var(--amber);  border-color: rgba(255,194,75,.32);  background: rgba(255,194,75,.09); }
.pill--bad   { color: var(--red);    border-color: rgba(255,107,107,.32); background: rgba(255,107,107,.09); }

.dot { display: inline-block; width: .5rem; height: .5rem; border-radius: 50%; margin-right: .4rem; vertical-align: .02em; }
.dot--granted { background: var(--violet); }
.dot--topped  { background: var(--cyan); }

.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem; padding: .9375rem 1.25rem; border-radius: .875rem;
  font: 500 .9375rem/1 var(--ui); letter-spacing: .01em;
  border: 1px solid var(--hair); background: var(--glass);
  transition: transform .1s ease-out, opacity .15s;
}
.btn:active { transform: scale(.975); }
.btn--block { width: 100%; }
.btn--primary {
  color: #04120f; border-color: transparent;
  background: linear-gradient(180deg, #6ff5db, var(--cyan) 60%, #29c9ae);
  box-shadow: 0 .5rem 1.5rem -.5rem rgba(72,235,205,.5);
  font-weight: 700;
}
.btn--ghost { color: var(--ink); }
.btn[disabled] { opacity: .5; pointer-events: none; }
.btn.is-busy .btn__label { opacity: .35; }
.btn.is-busy::after {
  content: ''; position: absolute; width: 1rem; height: 1rem; border-radius: 50%;
  border: 2px solid currentColor; border-top-color: transparent; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(1turn); } }

.linkbtn { color: var(--cyan); text-decoration: underline; text-decoration-color: rgba(72,235,205,.35); padding: 0; }

/* ── sonar ping mark ────────────────────────────────────────────────── */
.ping { position: relative; display: grid; place-items: center; width: 1.5rem; height: 1.5rem; flex: none; }
.ping i { width: 22%; height: 22%; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 .5rem rgba(72,235,205,.7); }
.ping span {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1.5px solid var(--cyan); opacity: 0; transform: scale(.25);
  animation: ripple 2.8s cubic-bezier(.2,.6,.3,1) infinite;
}
.ping span:nth-child(2) { animation-delay: .95s; }
.ping span:nth-child(3) { animation-delay: 1.9s; }
.ping--lg { width: 4.5rem; height: 4.5rem; }
.ping--lg i { width: 16%; height: 16%; }
.ping--xs { width: 1rem; height: 1rem; }
.ping--xs span { border-width: 1px; }
@keyframes ripple {
  0%   { opacity: .75; transform: scale(.22); }
  70%  { opacity: 0;   transform: scale(1); }
  100% { opacity: 0;   transform: scale(1); }
}

/* ── gate ───────────────────────────────────────────────────────────── */
.gate {
  position: relative; z-index: 2; height: 100%; display: grid; place-items: center;
  padding: calc(var(--safe-t) + 2rem) var(--pad) calc(var(--safe-b) + 2rem);
  overflow-y: auto;
}
.gate__inner { width: 100%; max-width: 24rem; text-align: center; }
.gate__inner > * { animation: rise .7s cubic-bezier(.2,.7,.2,1) backwards; }
.gate #gatePing { margin: 0 auto 1.75rem; animation-delay: .02s; }
.gate__title {
  margin: 0; font: 400 3.25rem/1 var(--display); letter-spacing: -.02em;
  animation-delay: .08s;
}
.gate__sub { margin: .375rem 0 2.25rem; color: var(--ink-dim); font-size: .9375rem; animation-delay: .14s; }
.gate__form { animation-delay: .2s; }
.gate__note { margin: 1.5rem 0 0; font-size: .75rem; line-height: 1.6; color: var(--ink-faint); animation-delay: .26s; }
.gate__err { margin: .75rem 0 0; font-size: .8125rem; color: var(--red); }
@keyframes rise { from { opacity: 0; transform: translateY(.75rem); } }

.field { position: relative; display: block; text-align: left; margin-bottom: .875rem; }
.field__label {
  display: block; margin-bottom: .5rem; font: 500 .6875rem/1 var(--ui);
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint);
}
.field__input {
  width: 100%; padding: .9375rem 3rem .9375rem 1rem; border-radius: .875rem;
  font: 400 1rem/1.2 var(--mono); color: var(--ink); letter-spacing: .02em;
  background: rgba(3,7,13,.6); border: 1px solid var(--hair);
  transition: border-color .18s, box-shadow .18s;
}
.field__input::placeholder { color: var(--ink-faint); }
.field__input:focus {
  outline: none; border-color: rgba(72,235,205,.55);
  box-shadow: 0 0 0 3px rgba(72,235,205,.13);
}
.field__peek {
  position: absolute; right: .4375rem; bottom: .4375rem; padding: .5rem .5625rem;
  border-radius: .625rem; color: var(--ink-faint); line-height: 1;
  font: 500 .625rem/1 var(--ui); letter-spacing: .12em; text-transform: uppercase;
}
.field__peek.is-on { color: var(--cyan); }
.field__input--sm { padding: .75rem .875rem; font-size: .875rem; }
.field__input--num { width: 6rem; padding: .5rem .625rem; text-align: right; font-size: .875rem; }

/* ── app chrome ─────────────────────────────────────────────────────── */
.app { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; }

.chrome {
  position: relative; z-index: 3; flex: none;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: .5rem;
  padding: calc(var(--safe-t) + .625rem) .875rem .625rem;
  background: linear-gradient(rgba(4,7,13,.72), rgba(4,7,13,.35) 70%, transparent);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  mask-image: linear-gradient(to bottom, #000 0 72%, transparent);
}
.chrome__title {
  font: 400 1.125rem/1 var(--display); letter-spacing: .01em; text-align: center;
  color: var(--ink);
}
.chip {
  display: inline-flex; align-items: center; gap: .4375rem; justify-self: start;
  max-width: 100%; padding: .375rem .5rem .375rem .375rem; border-radius: .75rem;
  border: 1px solid var(--hair); background: var(--glass);
  font: 500 .8125rem/1 var(--ui); transition: transform .1s ease-out;
}
.chip:active { transform: scale(.96); }
.chip__name { max-width: 7rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip__chev { width: .75rem; height: .75rem; color: var(--ink-faint); }
.iconbtn {
  justify-self: end; display: grid; place-items: center; width: 2.25rem; height: 2.25rem;
  border-radius: .75rem; border: 1px solid var(--hair); background: var(--glass);
  color: var(--ink-dim); transition: transform .1s ease-out, color .15s;
}
.iconbtn:active { transform: scale(.94); }
.iconbtn svg { width: 1.125rem; height: 1.125rem; }
.iconbtn.is-busy { color: var(--cyan); }
.iconbtn.is-busy svg { animation: spin .9s cubic-bezier(.4,0,.6,1) infinite; }

/* ── scroller + pull to refresh ─────────────────────────────────────── */
.scroller {
  flex: 1; min-height: 0; overflow-y: auto; overflow-x: hidden;
  -webkit-overflow-scrolling: touch; overscroll-behavior-y: contain;
  margin-top: -3.25rem; padding-top: 3.25rem;
}
.ptr {
  height: 0; margin-top: -.25rem; display: grid; place-items: center;
  opacity: 0; will-change: transform, opacity;
}
.ptr .ping { width: 1.75rem; height: 1.75rem; }
.ptr.is-armed .ping i { background: #fff; }

.flow {
  max-width: 30rem; margin: 0 auto;
  padding: .25rem var(--pad) calc(var(--safe-b) + 3rem);
  display: flex; flex-direction: column; gap: .875rem;
  will-change: transform;
}
.flow > * { animation: rise .55s cubic-bezier(.2,.7,.2,1) backwards; animation-delay: calc(var(--i) * 55ms + 40ms); }

/* ── cards ──────────────────────────────────────────────────────────── */
.card {
  position: relative; padding: 1.125rem 1.125rem 1.25rem; border-radius: var(--r-card);
  background: linear-gradient(168deg, rgba(126,180,205,.085), rgba(126,180,205,.022) 60%, rgba(126,180,205,.03));
  border: 1px solid var(--hair);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  box-shadow: 0 1.25rem 2.5rem -1.5rem rgba(0,0,0,.9);
}
.card::before {
  content: ''; position: absolute; inset: 0 0 auto; height: 1px; border-radius: inherit;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.16) 30% 70%, transparent);
}
.card__head { display: flex; align-items: center; justify-content: space-between; gap: .75rem; min-height: 1.5rem; }
.card--hero { padding-bottom: 1.125rem; }
.card--tile { padding: 1rem 1rem 1.0625rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: .875rem; }

/* hero number */
.hero {
  display: flex; align-items: baseline; gap: .125rem; margin: .875rem 0 0;
  font-family: var(--mono); font-weight: 600; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.hero__sym { font-size: 1.5rem; color: var(--ink-dim); margin-right: .25rem; transform: translateY(-.35em); }
.hero__int { font-size: clamp(2.75rem, 15vw, 4rem); line-height: .95; letter-spacing: -.045em; }
.hero__frac { font-size: clamp(1.25rem, 6vw, 1.625rem); letter-spacing: -.02em; color: var(--ink-dim); }
.hero__cur {
  margin-left: auto; font: 500 .6875rem/1 var(--ui); letter-spacing: .16em;
  color: var(--ink-faint); align-self: flex-end; padding-bottom: .3rem;
}

.delta { display: flex; align-items: center; gap: .375rem; margin-top: .625rem; font-size: .8125rem; }
.delta__arrow { font-family: var(--mono); }
.delta__val { font: 600 .8125rem/1 var(--mono); font-variant-numeric: tabular-nums; }
.delta__since { color: var(--ink-faint); }
.delta.is-down .delta__val, .delta.is-down .delta__arrow { color: var(--amber); }
.delta.is-up   .delta__val, .delta.is-up   .delta__arrow { color: var(--cyan); }
.delta.is-flat .delta__val, .delta.is-flat .delta__arrow { color: var(--ink-faint); }

/* stacked meter */
.meter {
  display: flex; gap: 2px; height: .5rem; margin-top: 1.125rem;
  border-radius: 1rem; background: rgba(255,255,255,.05); overflow: hidden;
}
.meter__seg { height: 100%; width: 0; transition: width .7s cubic-bezier(.2,.7,.2,1); border-radius: 1rem; }
.meter__seg--granted { background: linear-gradient(90deg, #6d5bff, var(--violet)); }
.meter__seg--topped  { background: linear-gradient(90deg, var(--cyan-deep), var(--cyan)); }

.legend { display: flex; gap: 1.25rem; margin: .75rem 0 0; }
.legend__item { }
.legend dt { font: 400 .75rem/1.4 var(--ui); color: var(--ink-faint); }
.legend dd { margin: .1875rem 0 0; font: 600 .9375rem/1 var(--mono); font-variant-numeric: tabular-nums; }
.legend__item.is-zero { opacity: .42; }

.currency-tabs { display: flex; gap: .375rem; margin-top: 1rem; }
.currency-tabs button {
  padding: .375rem .625rem; border-radius: .625rem; border: 1px solid var(--hair);
  font: 500 .75rem/1 var(--mono); color: var(--ink-faint); background: rgba(255,255,255,.02);
}
.currency-tabs button[aria-selected="true"] { color: var(--cyan); border-color: rgba(72,235,205,.4); background: rgba(72,235,205,.08); }

/* tiles */
.tile__val {
  margin: .75rem 0 0; font: 600 1.5rem/1 var(--mono); letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}
.tile__val.is-muted { color: var(--ink-faint); }
.tile__sub { margin: .375rem 0 0; font-size: .75rem; color: var(--ink-faint); line-height: 1.4; }
.card--tile { display: flex; flex-direction: column; }
.card--tile .tile__sub { margin-top: auto; padding-top: .375rem; }

/* segmented control */
.seg { display: flex; gap: 1px; padding: 2px; border-radius: .625rem; background: rgba(255,255,255,.05); }
.seg button {
  padding: .3125rem .5rem; border-radius: .5rem; font: 500 .6875rem/1 var(--ui);
  letter-spacing: .04em; color: var(--ink-faint); transition: color .15s, background .2s;
}
.seg button[aria-selected="true"] { color: var(--ink); background: rgba(255,255,255,.1); }

/* chart */
.chart { position: relative; margin-top: 1rem; height: 7.5rem; }
.chart svg { display: block; width: 100%; height: 100%; overflow: visible; }
.chart__empty {
  margin: 0; position: absolute; inset: 0; display: grid; place-items: center;
  text-align: center; font-size: .8125rem; color: var(--ink-faint); padding: 0 1rem;
}
.chart__axis {
  display: flex; justify-content: space-between; margin-top: .5rem;
  font: 400 .6875rem/1 var(--mono); color: var(--ink-faint);
}
.chart__hair { stroke: var(--hair-2); stroke-width: 1; }
.chart__line { fill: none; stroke: var(--cyan); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart__area { fill: url(#sonarGrad); }
.chart__tip { fill: #fff; }
.chart__tipring { fill: none; stroke: rgba(72,235,205,.45); stroke-width: 1.5; }
.chart__lbl { font: 400 .625rem/1 var(--mono); fill: var(--ink-faint); }

/* estimates */
.est { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.est__row { display: flex; align-items: baseline; justify-content: space-between; gap: .75rem; font-size: .8125rem; }
.est__row b { font: 600 .875rem/1 var(--mono); font-variant-numeric: tabular-nums; color: var(--ink); }
.est__model { color: var(--ink-dim); font-family: var(--mono); font-size: .75rem; }

.drawer { margin-top: 1rem; border-top: 1px solid var(--hair-2); padding-top: .75rem; }
.drawer summary {
  font: 500 .6875rem/1 var(--ui); letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); cursor: pointer; list-style: none;
}
.drawer summary::-webkit-details-marker { display: none; }
.drawer summary::after { content: ' +'; font-family: var(--mono); }
.drawer[open] summary::after { content: ' –'; }
.ptable { margin-top: .875rem; display: grid; gap: .5rem; font-size: .75rem; }
.ptable__row { display: grid; grid-template-columns: 1fr auto auto; gap: .625rem; align-items: baseline; }
.ptable__row--head { color: var(--ink-faint); letter-spacing: .06em; text-transform: uppercase; font-size: .625rem; }
.ptable__row b, .ptable__row span:not(:first-child) { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.ptable__m { font-family: var(--mono); color: var(--ink-dim); overflow: hidden; text-overflow: ellipsis; }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: .375rem; margin-top: .875rem; }
.chips span {
  padding: .375rem .5625rem; border-radius: .5rem; border: 1px solid var(--hair);
  background: rgba(255,255,255,.025); font: 400 .75rem/1 var(--mono); color: var(--ink-dim);
}
.chips__skel { width: 6rem; height: 1.75rem; border-radius: .5rem; background: rgba(255,255,255,.04); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .4; } }
.count { font: 400 .75rem/1 var(--mono); color: var(--ink-faint); }

.foot { text-align: center; padding: .5rem 0 0; }
.foot p:first-child { margin: 0; font: 400 .75rem/1.5 var(--mono); color: var(--ink-faint); }

/* ── sheet ──────────────────────────────────────────────────────────── */
.scrim {
  position: fixed; inset: 0; z-index: 8; background: rgba(2,4,8,.6);
  backdrop-filter: blur(2px); opacity: 0; transition: opacity .3s ease;
}
.scrim.is-in { opacity: 1; }
.sheet {
  position: fixed; z-index: 9; left: 0; right: 0; bottom: 0;
  max-height: 88vh; display: flex; flex-direction: column;
  border-radius: 1.75rem 1.75rem 0 0;
  background: linear-gradient(180deg, rgba(20,30,44,.92), rgba(6,10,18,.97));
  border-top: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  box-shadow: 0 -1rem 4rem rgba(0,0,0,.7);
  transform: translateY(100%); will-change: transform;
  padding-bottom: var(--safe-b);
}
.sheet__grab { flex: none; display: grid; place-items: center; padding: .75rem 0 .25rem; cursor: grab; touch-action: none; }
.sheet__grab i { width: 2.25rem; height: .25rem; border-radius: 1rem; background: rgba(255,255,255,.22); }
.sheet__body { overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; padding: .5rem 1.25rem 1.5rem; }
.sheet__title {
  margin: 1.25rem 0 .75rem; font: 500 .6875rem/1 var(--ui);
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint);
}
.sheet__body > .sheet__title:first-child { margin-top: .25rem; }

.acctlist { display: flex; flex-direction: column; gap: .5rem; }
.acct {
  display: flex; align-items: center; gap: .75rem; padding: .8125rem .875rem;
  border-radius: .875rem; border: 1px solid var(--hair); background: rgba(255,255,255,.025);
  transition: transform .1s ease-out;
}
.acct:active { transform: scale(.99); }
.acct.is-active { border-color: rgba(72,235,205,.4); background: rgba(72,235,205,.07); }
.acct__pick { flex: 1; display: flex; flex-direction: column; gap: .1875rem; text-align: left; min-width: 0; }
.acct__label { font-size: .9375rem; font-weight: 500; }
.acct__key { font: 400 .75rem/1 var(--mono); color: var(--ink-faint); }
.acct__now { font: 500 .625rem/1 var(--ui); letter-spacing: .12em; text-transform: uppercase; color: var(--cyan); }
.acct__del { width: 2rem; height: 2rem; border-radius: .5rem; color: var(--ink-faint); font-size: 1.125rem; line-height: 1; }
.acct__del:active { color: var(--red); }

.addform { display: grid; grid-template-columns: 1fr 1fr auto; gap: .5rem; margin-top: .75rem; align-items: center; }
.addform .btn { padding: .75rem .875rem; font-size: .8125rem; }
.addform .gate__err { grid-column: 1 / -1; margin: 0; }

.rows { display: flex; flex-direction: column; gap: .5rem; }
.row {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  padding: .8125rem .875rem; border-radius: .875rem; width: 100%;
  border: 1px solid var(--hair); background: rgba(255,255,255,.025);
  font-size: .9375rem; text-align: left;
}
.row--btn { transition: transform .1s ease-out; }
.row--btn:active { transform: scale(.99); }
.row__k { font-weight: 500; }
.row__v { font: 400 .8125rem/1 var(--mono); color: var(--ink-faint); }
.row--danger .row__k { color: var(--red); }

/* ── toast ──────────────────────────────────────────────────────────── */
.toast {
  position: fixed; z-index: 20; left: 50%; bottom: calc(var(--safe-b) + 1.5rem);
  transform: translate(-50%, .75rem); opacity: 0;
  padding: .75rem 1rem; border-radius: .875rem; max-width: min(22rem, 88vw);
  background: rgba(18,26,38,.92); border: 1px solid var(--hair);
  backdrop-filter: blur(18px); font-size: .8125rem; text-align: center;
  transition: opacity .25s, transform .35s cubic-bezier(.2,.7,.2,1);
  box-shadow: 0 1rem 2.5rem -1rem rgba(0,0,0,.8);
}
.toast.is-in { opacity: 1; transform: translate(-50%, 0); }
.toast.is-bad { border-color: rgba(255,107,107,.4); color: #ffd9d9; }

/* ── responsive / desktop ───────────────────────────────────────────── */
@media (min-width: 40rem) {
  .flow { max-width: 34rem; padding-top: .75rem; }
  .hero__int { font-size: 4rem; }
  .sheet { left: 50%; right: auto; width: 30rem; transform: translate(-50%, 100%); border-radius: 1.75rem; bottom: 1rem; }
}
@media (hover: hover) {
  .btn:hover { filter: brightness(1.06); }
  .iconbtn:hover, .chip:hover { border-color: rgba(150,205,215,.28); color: var(--ink); }
  .seg button:hover { color: var(--ink); }
  .acct:hover { border-color: rgba(150,205,215,.26); }
}

/* ── accessibility prefs ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .12s !important; }
  .flow > * { animation: none; }
  .ping span { display: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .card, .chrome, .sheet, .toast { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .card { background: #0a1018; }
  .chrome { background: #05080e; }
  .sheet { background: #0a1018; }
  .depth__grain { display: none; }
}
@media (prefers-contrast: more) {
  :root { --ink-dim: #c2d4da; --ink-faint: #9db0b8; --hair: rgba(180,225,235,.34); }
  .card { background: #080d15; }
}