/* ═══════════════════════════════════════════════════════════
   CALCULATOR PANEL — compact and responsive.
   Sized so the whole tool fits on one phone screen.
   ═══════════════════════════════════════════════════════════ */

.tui {
  position: relative; overflow: hidden;
  background: linear-gradient(172deg, var(--surface) 0%, var(--bg-deep) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-dark);
  padding: 1.15rem;
  margin-top: 1.35rem;
  color: var(--text-secondary);
  text-align: center;
}
@media (min-width: 640px)  { .tui { padding: 1.5rem; border-radius: var(--radius-xl); } }
@media (min-width: 1024px) { .tui { padding: 1.85rem; } }

.tui::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(1.3px 1.3px at 14% 16%, rgba(255,255,255,.4), transparent),
    radial-gradient(1.1px 1.1px at 77% 10%, rgba(255,255,255,.3), transparent),
    radial-gradient(1px 1px at 91% 49%, rgba(255,255,255,.26), transparent),
    radial-gradient(1.2px 1.2px at 26% 78%, rgba(255,255,255,.24), transparent),
    radial-gradient(1px 1px at 58% 91%, rgba(255,255,255,.2), transparent);
  background-size: 400px 400px;
}
.tui > * { position: relative; z-index: 1; }

.tui__steps-lead { font-size: .8125rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.6; max-width: 34rem; margin-inline: auto; }

/* ── mode pills ───────────────────────────────────────────── */
.tui__seg { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: center; margin-bottom: 1.15rem; padding: 0; background: none; border: 0; }
.tui__seg button {
  flex: 1 1 8rem; padding: .55rem .85rem; min-height: 40px;
  font-family: inherit; font-size: .8125rem; font-weight: 600;
  color: var(--text-secondary); cursor: pointer;
  background: rgba(255,255,255,.045);
  border: 1px solid var(--border); border-radius: 999px;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.tui__seg button:hover { color: var(--text-primary); border-color: var(--gold-dark); }
.tui__seg button.is-active { background: var(--gold); border-color: var(--gold); color: #2b1f05; font-weight: 700; }
@media (min-width: 640px) { .tui__seg button { flex: 0 1 auto; padding: .6rem 1.15rem; font-size: .875rem; } }

/* ── fields ───────────────────────────────────────────────── */
.tui__fields, .tui__row {
  display: grid; gap: .85rem 1rem; margin-top: 1rem;
  grid-template-columns: 1fr;
  text-align: left;
}
@media (min-width: 560px) { .tui__row { grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr)); } }
.tui__field { display: flex; flex-direction: column; gap: .3rem; min-width: 0; }
.tui__label { font-size: .625rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; color: var(--text-muted); }

.tui input[type="number"], .tui input[type="text"], .tui input[type="time"], .tui select {
  width: 100%; padding: .55rem .7rem; min-height: 44px;
  font-family: var(--mono); font-size: .9375rem; font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary); background: var(--surface-elevated);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: border-color .16s var(--ease), box-shadow .16s var(--ease);
}
.tui select {
  font-family: var(--sans); font-size: .875rem; font-weight: 600;
  appearance: none; padding-right: 1.85rem;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5l5-5' stroke='%238d97ba' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right .7rem center; background-size: 11px;
}
.tui select option { background: var(--surface); color: var(--text-primary); }
.tui input::placeholder { color: var(--text-muted); font-weight: 400; }
.tui input:hover, .tui select:hover { border-color: var(--gold-dark); }
.tui input:focus, .tui select:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px var(--gold-soft); }
.tui input:disabled { opacity: .4; cursor: not-allowed; }
.tui input[type="range"] { accent-color: var(--gold); padding: 0; min-height: 30px; background: none; border: 0; box-shadow: none; width: 100%; }
.tui__check { display: inline-flex; align-items: center; gap: .5rem; margin-top: .9rem; font-size: .8125rem; color: var(--text-secondary); cursor: pointer; }
.tui__check input { width: 17px; height: 17px; accent-color: var(--gold); }

/* ── buttons ──────────────────────────────────────────────── */
.tui__btn {
  padding: .6rem 1.15rem; min-height: 42px;
  font-family: inherit; font-size: .8125rem; font-weight: 650;
  border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.05); color: var(--text-secondary);
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), transform .1s var(--ease);
}
.tui__btn:hover { background: rgba(255,255,255,.1); border-color: var(--gold-dark); color: var(--text-primary); }
.tui__btn:active { transform: translateY(1px); }
.tui__btn--primary {
  background: linear-gradient(160deg, var(--gold-light), var(--gold-dark));
  border-color: var(--gold); color: #2b1f05;
  font-weight: 700; font-size: .9375rem; padding: .7rem 1.9rem; min-height: 46px;
  box-shadow: var(--gold-glow);
}
.tui__btn--primary:hover { color: #2b1f05; box-shadow: 0 0 34px rgba(242,198,109,.3); }
.tui__btn--quiet { background: transparent; color: var(--text-muted); }
.tui__btn--quiet:hover { color: var(--text-primary); }
.tui__actions { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; margin-top: 1.15rem; }

/* ── headline result ──────────────────────────────────────── */
.tui__result {
  display: flex; align-items: baseline; justify-content: center; gap: .45rem; flex-wrap: wrap;
  padding: .95rem 1rem; margin-top: 1.2rem;
  background: rgba(8,13,33,.55);
  border: 1px solid var(--border); border-radius: var(--radius-md);
}
.tui__value {
  font-family: var(--serif); font-variant-numeric: tabular-nums;
  font-size: clamp(1.85rem, 7vw, 2.6rem); font-weight: 700;
  line-height: 1.05; letter-spacing: -.02em; color: var(--text-primary);
}
.tui__value.is-idle { color: var(--text-muted); }
.tui__value.is-good { color: var(--gold); }
.tui__value.is-bad  { color: var(--error); }
.tui__unit { font-size: .6875rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); }
.tui__caption { color: var(--text-secondary); font-size: .8125rem; margin-top: .7rem; line-height: 1.6; max-width: 34rem; margin-inline: auto; }

/* ── in-panel headings ────────────────────────────────────── */
.tui h3 { font-family: var(--sans); font-size: .625rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; color: var(--text-muted); margin-top: 1.5rem; }
.tui h3.tui__display { font-family: var(--serif); font-size: 1.05rem; font-weight: 700; letter-spacing: -.005em; text-transform: none; color: var(--text-primary); }

/* ── result cards ─────────────────────────────────────────── */
.tui__options {
  list-style: none; margin: 1rem 0 0; padding: 0;
  display: grid; gap: .6rem; grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 520px) { .tui__options { grid-template-columns: repeat(3, 1fr); gap: .7rem; } }
@media (min-width: 800px) { .tui__options { grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); } }
.tui__option {
  position: relative; display: flex; flex-direction: column; gap: .2rem; align-items: center;
  padding: .95rem .6rem .8rem;
  background: var(--surface-elevated);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.tui__option:hover { transform: translateY(-2px); border-color: var(--gold-dark); }
.tui__option--best {
  background: linear-gradient(158deg, rgba(242,198,109,.1), var(--surface-elevated));
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(242,198,109,.09);
}
.tui__option-main { font-family: var(--serif); font-variant-numeric: tabular-nums; font-size: 1.15rem; font-weight: 700; color: var(--text-primary); line-height: 1.15; }
@media (min-width: 520px) { .tui__option-main { font-size: 1.3rem; } }
.tui__option--best .tui__option-main { color: var(--gold); }
.tui__option-note { font-size: .6875rem; color: var(--text-muted); line-height: 1.45; }
.tui__badge {
  position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
  font-size: .5625rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase;
  padding: .18rem .5rem; border-radius: 999px; white-space: nowrap;
  background: var(--gold); color: #2b1f05;
}
.tui__badge--ok { background: var(--success-soft); color: var(--success); border: 1px solid rgba(115,201,155,.35); }
.tui__dots { display: flex; justify-content: center; gap: 3px; margin-top: .25rem; }
.tui__dots i { width: 5px; height: 5px; border-radius: 50%; background: var(--border); display: inline-block; }
.tui__dots i.on { background: var(--gold); }

/* ── glance bar ───────────────────────────────────────────── */
.glance { margin-top: 1.1rem; padding: .9rem 1rem; background: rgba(8,13,33,.5); border: 1px solid var(--border); border-radius: var(--radius-md); }
.glance__title { font-size: .5625rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--text-muted); text-align: center; margin-bottom: .7rem; }
.glance__track { display: flex; align-items: center; gap: .6rem; }
.glance__track span { font-size: .9rem; line-height: 1; }
.glance__bar { flex: 1; height: 5px; border-radius: 99px; background: linear-gradient(90deg, var(--gold-dark), var(--gold-light)); }
.glance__ends { display: flex; justify-content: space-between; gap: .5rem; margin-top: .6rem; font-size: .6875rem; color: var(--text-muted); flex-wrap: wrap; }
.glance__ends b { color: var(--text-primary); font-weight: 600; }
.glance__mid { display: none; }
@media (min-width: 480px) { .glance__mid { display: inline; } }

/* ── messages ─────────────────────────────────────────────── */
.tui__msg { margin-top: .9rem; padding: .7rem .9rem; border-radius: var(--radius-sm); font-size: .8125rem; line-height: 1.6; }
.tui__msg--wait { background: rgba(255,255,255,.04); border: 1px solid var(--border); color: var(--text-secondary); }
.tui__msg--info { background: rgba(255,255,255,.05); border: 1px solid var(--border); color: var(--text-secondary); }
.tui__msg--warn { background: rgba(230,178,92,.1); border: 1px solid rgba(230,178,92,.3); color: #ecd6ae; }

/* ── stats ────────────────────────────────────────────────── */
.tui__stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin-top: 1rem; }
@media (min-width: 560px) { .tui__stats { grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr)); } }
.tui__stat { display: flex; flex-direction: column; gap: .15rem; padding: .65rem .75rem; background: var(--surface-elevated); border: 1px solid var(--border); border-radius: var(--radius-sm); text-align: left; }
.tui__stat-label { font-size: .5625rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--text-muted); }
.tui__stat-value { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: .9375rem; font-weight: 700; color: var(--text-primary); }

/* ── editable rows ────────────────────────────────────────── */
.tui__table { width: 100%; margin-top: 1rem; text-align: left; }
.tui__thead { display: none; }
.tui__list { display: grid; gap: .5rem; }
.tui__item {
  display: grid; gap: .45rem; grid-template-columns: 1fr 1fr; align-items: center;
  padding: .7rem; background: rgba(255,255,255,.035);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.tui__item > :first-child, .tui__item > :last-child { grid-column: 1 / -1; }
.tui__item input, .tui__item select { min-height: 42px; font-size: .875rem; }
.tui__rowresult { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: .875rem; font-weight: 700; color: var(--gold); }
.tui__rowresult.is-empty { color: var(--text-muted); font-weight: 400; }
.tui__remove { border: 1px solid var(--border); background: rgba(255,255,255,.04); border-radius: var(--radius-sm); min-height: 42px; cursor: pointer; color: var(--text-muted); font-size: 1.05rem; line-height: 1; }
.tui__remove:hover { color: var(--error); border-color: var(--error); }
@media (min-width: 760px) {
  .tui__thead { display: grid; gap: .45rem; grid-template-columns: 1.3fr 5rem 5rem 4.5rem 2.5rem; padding: 0 .7rem .45rem; }
  .tui__thead span { font-size: .5625rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--text-muted); }
  .tui__item { grid-template-columns: 1.3fr 5rem 5rem 4.5rem 2.5rem; background: none; border: 0; padding: 0 .7rem; }
  .tui__item > :first-child, .tui__item > :last-child { grid-column: auto; }
  .tui__rowresult { text-align: right; }
}

/* ── supporting text ──────────────────────────────────────── */
.tui__hint { font-size: .6875rem; color: var(--text-muted); margin-top: .25rem; line-height: 1.5; }
.tui__error { display: block; margin-top: .25rem; font-size: .6875rem; color: var(--error); font-weight: 550; }
.tui input[aria-invalid="true"] { border-color: var(--error); }
.tui__formulas { display: grid; gap: .5rem; margin-top: .75rem; text-align: left; }
.tui__formulas .formula { margin: 0; padding: .8rem .9rem; font-size: .75rem; line-height: 1.65; }
.tui__est { margin-top: 1.2rem; padding-top: .9rem; border-top: 1px solid var(--border); font-size: .6875rem; line-height: 1.65; color: var(--text-muted); text-align: left; }
.tui__est strong { color: var(--text-secondary); }
.tui__assume { list-style: none; margin: .75rem 0 0; padding: 0; display: grid; gap: .4rem; text-align: left; }
.tui__assume li { position: relative; padding-left: 1rem; font-size: .75rem; color: var(--text-muted); line-height: 1.6; }
.tui__assume li::before { content: ""; position: absolute; left: 0; top: .6em; width: 4px; height: 4px; border-radius: 50%; background: var(--gold); }

/* ── timeline + pairs, responsive ─────────────────────────── */
.pairs, .timeline { text-align: left; }
.timeline { margin-top: .9rem; display: grid; gap: .4rem; }
.timeline__row { display: grid; grid-template-columns: 1fr; gap: .2rem; }
@media (min-width: 620px) { .timeline__row { grid-template-columns: 7.5rem 1fr; gap: .7rem; align-items: center; } }
.timeline__label { font-size: .6875rem; font-weight: 650; color: var(--text-primary); }
.timeline__label span { display: block; font-weight: 400; color: var(--text-muted); font-family: var(--mono); font-size: .625rem; }
.timeline__bar { height: 24px; border-radius: var(--radius-sm); display: flex; overflow: hidden; background: var(--surface-elevated); border: 1px solid var(--border); }
.timeline__seg { height: 100%; display: grid; place-items: center; font-family: var(--mono); font-size: .625rem; font-weight: 700; color: #fff; min-width: 0; }
.seg--off { background: var(--text-muted); } .seg--sb { background: var(--gold-dark); } .seg--drive { background: var(--bg-deep); }
.timeline__key { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: .7rem; font-size: .6875rem; color: var(--text-muted); }
.timeline__key span { display: inline-flex; align-items: center; gap: .35rem; }
.timeline__key i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

.pairs { display: grid; gap: .5rem; margin-top: .9rem; }
.pairs[hidden] { display: none; }
.pair { display: flex; justify-content: space-between; gap: .75rem; align-items: center; padding: .65rem .85rem; background: var(--surface-elevated); border: 1px solid var(--border); border-left: 2px solid var(--border); border-radius: var(--radius-sm); }
.pair--qualifies { border-left-color: var(--success); }
.pair--short { border-left-color: var(--warning); }
.pair__name { font-size: .8125rem; font-weight: 650; color: var(--text-primary); }
.pair__name small { display: block; font-weight: 400; color: var(--text-muted); font-size: .6875rem; }
.pair__val { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: .875rem; font-weight: 700; color: var(--text-primary); text-align: right; }
.pair__val small { display: block; font-family: var(--sans); font-size: .5625rem; font-weight: 650; text-transform: uppercase; letter-spacing: .04em; }
.pair--qualifies .pair__val small { color: var(--success); }
.pair--short .pair__val small { color: var(--warning); }