/* ============================================================================
   ATOMIC LAB — TOOLS PAGE
   ========================================================================== */

.pg-tools { --sect-y: clamp(1.75rem, 3vw, 2.75rem); }

.tools-head { padding-top: calc(var(--nav-h) + clamp(1.5rem, 3vw, 2.5rem)); padding-bottom: clamp(1rem, 2vw, 1.5rem); }
.tools-head .lede { margin-top: 0.85rem; }
.tools-head .eyebrow { margin-bottom: 0.65rem; }

.tools-nav {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-top: 1.6rem; padding-top: 1.2rem;
  border-top: 1px solid var(--edge-soft);
}
.tools-nav__link {
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono); font-size: var(--t-3xs);
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--ink-3);
  border: 1px solid var(--edge); border-radius: var(--r-pill);
  transition: all var(--d-2) var(--e-out);
}
.tools-nav__link:hover { color: var(--ink); border-color: var(--edge-strong); background: rgba(255,255,255,0.04); }
.tools-nav__link.is-active { color: var(--beam); border-color: rgba(89,230,255,0.45); background: rgba(89,230,255,0.09); }

/* --- Tool shell --------------------------------------------------------- */
.tool { position: relative; scroll-margin-top: calc(var(--nav-h) + 1.5rem); }
.tool__head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-5); flex-wrap: wrap; margin-bottom: 1.5rem; }
.tool__head .eyebrow { margin-bottom: 0.5rem; }
.tool__sub { margin-top: 0.6rem; font-size: var(--t-sm); color: var(--ink-2); max-width: 62ch; line-height: 1.62; }
.tool__sub code { font-family: var(--font-mono); font-size: 0.9em; padding: 0.1em 0.4em; border-radius: 3px; background: rgba(255,255,255,0.07); color: #cdf6ff; }
.tool__score { display: flex; gap: 1.1rem; font-size: var(--t-3xs); letter-spacing: 0.12em; color: var(--ink-3); }
.tool__score b { color: var(--beam); font-size: var(--t-md); font-weight: 500; margin-left: 0.35rem; }
.tool__err {
  padding: 0.85rem 1.1rem;
  background: rgba(255,95,118,0.09);
  border: 1px solid rgba(255,95,118,0.3);
  border-radius: var(--r-3);
  color: #ffb3be; font-size: var(--t-sm);
}
.tool__note { font-size: var(--t-3xs); letter-spacing: 0.06em; margin-top: 1rem; }

.tool__io { margin-bottom: 1.75rem; }
.tool__out { min-height: 4rem; }

/* --- Molar mass output -------------------------------------------------- */
.mm__result {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-5); flex-wrap: wrap;
  padding: 1.15rem 1.35rem; margin-bottom: 1.25rem;
  background: linear-gradient(100deg, rgba(89,230,255,0.09), rgba(255,255,255,0.015) 60%);
  border: 1px solid rgba(89,230,255,0.22);
  border-radius: var(--r-3);
}
.mm__total { display: flex; flex-direction: column; gap: 0.2rem; }
.mm__total .mono { font-size: var(--t-3xs); letter-spacing: 0.15em; }
.mm__num { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 500; letter-spacing: -0.03em; color: #fff; line-height: 1.05; }
.mm__num small { font-size: 0.38em; color: var(--beam); margin-left: 0.35rem; letter-spacing: 0.02em; }
.mm__formula { font-family: var(--font-display); font-size: clamp(1.25rem, 3vw, 2rem); font-weight: 600; color: var(--beam); letter-spacing: -0.01em; }
.mm__formula sub { font-size: 0.62em; }

.mm__table td { vertical-align: middle; }
.mm__el { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--ink); transition: color var(--d-1); }
.mm__el:hover { color: var(--fam, var(--beam)); }
.mm__sym {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px;
  font-family: var(--font-display); font-weight: 700; font-size: var(--t-2xs);
  color: var(--fam, var(--beam));
  background: color-mix(in srgb, var(--fam, var(--beam)) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--fam, var(--beam)) 34%, transparent);
  border-radius: var(--r-1);
}
.mm__pctcell { display: flex; align-items: center; gap: 0.65rem; min-width: 160px; }
.mm__bar { flex: 1; height: 4px; border-radius: 2px; background: rgba(255,255,255,0.08); overflow: hidden; }
.mm__bar i { display: block; height: 100%; border-radius: 2px; background: var(--fam, var(--beam)); }

/* --- Balancer output ---------------------------------------------------- */
.eq__result {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 0.55rem;
  padding: 1.35rem 1.5rem;
  background: linear-gradient(100deg, rgba(169,139,255,0.09), rgba(255,255,255,0.015) 60%);
  border: 1px solid rgba(169,139,255,0.22);
  border-radius: var(--r-3);
  font-size: clamp(1.1rem, 2.6vw, 1.75rem);
}
.eq__term { display: inline-flex; align-items: baseline; gap: 0.15rem; }
.eq__coef { color: var(--pulse); font-weight: 700; font-family: var(--font-display); }
.eq__f { font-family: var(--font-display); font-weight: 500; color: #fff; }
.eq__f sub { font-size: 0.6em; }
.eq__op { color: var(--ink-3); margin: 0 0.2rem; }
.eq__arrow { color: var(--beam); margin: 0 0.5rem; font-size: 1.1em; }
.eq__checks { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.eq__check {
  font-family: var(--font-mono); font-size: var(--t-3xs);
  padding: 0.3rem 0.6rem; border-radius: var(--r-pill);
  color: var(--ok); background: rgba(79,224,138,0.1); border: 1px solid rgba(79,224,138,0.25);
  letter-spacing: 0.05em;
}
.eq__check b { color: #fff; font-weight: 500; }
.eq__check.is-bad { color: var(--danger); background: rgba(255,95,118,0.1); border-color: rgba(255,95,118,0.3); }

/* --- Config trainer ----------------------------------------------------- */
.cfg { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.75fr); gap: clamp(1.25rem, 3vw, 2.25rem); }
.cfg__prompt { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 1.1rem; }
.cfg__sym {
  --fam: var(--beam);
  width: 58px; height: 58px; flex: none;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700; font-size: 1.5rem; color: #fff;
  background: color-mix(in srgb, var(--fam) 20%, transparent);
  border: 1px solid color-mix(in srgb, var(--fam) 42%, transparent);
  border-radius: var(--r-3);
}
.cfg__prompt > div { display: flex; flex-direction: column; gap: 0.15rem; }
.cfg__name { font-family: var(--font-display); font-size: var(--t-lg); font-weight: 600; }
.cfg__prompt .mono { font-size: var(--t-3xs); letter-spacing: 0.1em; }
.cfg__prompt .btn { margin-left: auto; }

.cfg__built {
  min-height: 3.2rem;
  display: flex; align-items: center; flex-wrap: wrap; gap: 0.35rem;
  padding: 0.85rem 1.1rem; margin-bottom: 1rem;
  font-size: var(--t-md); color: var(--beam);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--edge); border-radius: var(--r-3);
}
.cfg__count { color: var(--ink-3); font-size: var(--t-2xs); margin-left: auto; }

.cfg__pad { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.padkey {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  padding: 0.5rem 0.65rem; min-width: 62px;
  border: 1px solid var(--edge); border-radius: var(--r-2);
  transition: all var(--d-1) var(--e-out);
}
.padkey b { font-family: var(--font-mono); font-size: var(--t-sm); color: var(--ink); }
.padkey span { font-size: var(--t-3xs); color: var(--ink-3); }
.padkey:hover { border-color: rgba(89,230,255,0.5); background: rgba(89,230,255,0.09); transform: translateY(-2px); }
.padkey[data-l="0"] b { color: #ff8f8f; }
.padkey[data-l="1"] b { color: #6ee0ef; }
.padkey[data-l="2"] b { color: #ffd97a; }
.padkey[data-l="3"] b { color: #d9a0ff; }

.cfg__ctl { display: flex; gap: 0.5rem; margin-top: 1.1rem; flex-wrap: wrap; }
.cfg__verdict { margin-top: 0.85rem; min-height: 1.4em; font-size: var(--t-sm); }
.cfg__verdict.is-ok { color: var(--ok); }
.cfg__verdict.is-bad { color: var(--warn); }
.cfg__verdict.is-hint { color: var(--beam); font-family: var(--font-mono); font-size: var(--t-xs); }

.cfg__aside { border-left: 1px solid var(--edge-soft); padding-left: clamp(1rem, 2vw, 1.75rem); }
.aufbau { display: flex; flex-direction: column; gap: 0.2rem; max-height: 320px; overflow-y: auto; }
.aufbau li { display: flex; align-items: baseline; justify-content: space-between; gap: 0.75rem; padding: 0.28rem 0; font-size: var(--t-2xs); border-bottom: 1px solid var(--edge-soft); }
.aufbau li span { color: var(--ink); }
.aufbau li em { color: var(--ink-3); font-style: normal; font-family: var(--font-mono); font-size: var(--t-3xs); }
.cfg__note { margin-top: 1rem; font-size: var(--t-2xs); line-height: 1.6; color: var(--ink-2); }
.lab__k { font-size: var(--t-3xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); }

@media (max-width: 880px) {
  .cfg { grid-template-columns: 1fr; }
  .cfg__aside { border-left: 0; border-top: 1px solid var(--edge-soft); padding-left: 0; padding-top: 1.25rem; }
}

/* --- Compare ------------------------------------------------------------ */
.cmp__pickers { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); gap: 0.6rem; margin-bottom: 1.5rem; }
.cmp__pick { display: flex; align-items: center; gap: 0.6rem; }
.cmp__psym {
  width: 42px; height: 42px; flex: none;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700; font-size: var(--t-md); color: #fff;
  background: color-mix(in srgb, var(--fam, var(--beam)) 20%, transparent);
  border: 1px solid color-mix(in srgb, var(--fam, var(--beam)) 42%, transparent);
  border-radius: var(--r-2);
}
.cmp__pick select { flex: 1; min-width: 0; font-size: var(--t-xs); }

.cmp th { vertical-align: bottom; }
.cmp__h { display: flex; flex-direction: column; gap: 0.1rem; color: var(--ink-2); }
.cmp__h b { font-family: var(--font-display); font-size: 1.35rem; color: var(--fam, var(--beam)); letter-spacing: -0.02em; }
.cmp__k { color: var(--ink-2); white-space: nowrap; }
.cmp__k small { color: var(--ink-3); font-family: var(--font-mono); font-size: 0.82em; }
.cmp__v { min-width: 110px; }
.cmp__v .num { display: block; color: var(--ink); font-size: var(--t-sm); }
.cmp__v.is-best .num { color: var(--fam, var(--beam)); font-weight: 600; }
.cmp__v.is-empty { color: var(--ink-3); }
.cmp__v--text { color: var(--ink-2); white-space: normal; }
.cmp__bar { display: block; height: 3px; border-radius: 2px; background: rgba(255,255,255,0.08); overflow: hidden; margin-top: 0.35rem; }
.cmp__bar i { display: block; height: 100%; border-radius: 2px; background: var(--fam, var(--beam)); }

/* --- Converter ---------------------------------------------------------- */
.cv {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 1rem;
  align-items: end;
  margin-top: 1.5rem;
}
.cv__side { display: flex; flex-direction: column; gap: 0.5rem; min-width: 0; }
.cv__side label { font-size: var(--t-3xs); letter-spacing: 0.16em; }
.cv__side .field { font-size: var(--t-md); }
.cv__out {
  display: flex; align-items: center;
  color: var(--beam); font-size: var(--t-md);
  background: rgba(89,230,255,0.07);
  border-color: rgba(89,230,255,0.25);
  overflow-x: auto; white-space: nowrap;
  min-height: 2.9rem;
}
.cv__swap { padding-bottom: 0.25rem; }
.cv__note { font-size: var(--t-3xs); margin-top: 0.85rem; letter-spacing: 0.05em; }
#cvKinds { margin-bottom: 0.5rem; }

@media (max-width: 700px) {
  .cv { grid-template-columns: 1fr; }
  .cv__swap { justify-self: center; }
  .cv__swap .btn { transform: rotate(90deg); }
}