/* Energy / power converter (BHP, kW, BTU/h…), placed after the pressure converter. */
.energy { background: linear-gradient(180deg, var(--paper-2), var(--paper)); border-top: 1px solid var(--line); }
.energy-key { display: inline-flex; flex-wrap: wrap; align-items: baseline; gap: 0.35rem 0.9rem; margin-top: 1.4rem; padding: 0.7rem 1.1rem; border-radius: 999px; background: var(--ink); color: var(--white); font-family: var(--mono); font-size: 0.86rem; }
.energy-key b { color: var(--accent-2); font-weight: 500; }
.en { display: grid; grid-template-columns: 360px 1fr; gap: 1.25rem; align-items: start; }
.en-input {
  position: sticky; top: 96px;
  padding: 1.5rem; border-radius: var(--radius);
  background: var(--white); border: 1px solid var(--line);
  box-shadow: 0 30px 60px -40px rgba(15, 17, 20, 0.45);
}
.en-field { display: grid; gap: 0.4rem; margin-bottom: 1rem; }
.en-field > span { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.en-field input, .en-field select {
  width: 100%; border-radius: 14px; border: 1px solid var(--line);
  background: var(--paper); color: var(--ink); padding: 0.85rem 1rem;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.en-field input { font-family: var(--display); font-weight: 700; font-size: 2.4rem; letter-spacing: -0.03em; padding: 0.6rem 1rem; }
.en-field input:focus, .en-field select:focus { outline: none; border-color: var(--accent); background: var(--white); box-shadow: 0 0 0 4px rgba(228, 70, 26, 0.16); }
.en-field select { font-size: 0.95rem; appearance: none; padding-right: 2.4rem; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%; background-size: 6px 6px; background-repeat: no-repeat; }
.en-hint { font-size: 0.8rem; margin: 0.4rem 0 0.6rem; }
.en-presets { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.en-presets button {
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-3);
  border-radius: 999px; padding: 0.4rem 0.75rem; font-size: 0.78rem; cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.en-presets button:hover { background: var(--accent); border-color: var(--accent); color: var(--white); }
.en-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
.en-card {
  position: relative; display: grid; gap: 0.15rem; text-align: left;
  padding: 1.1rem 1.15rem; border-radius: 16px; cursor: pointer;
  background: var(--white); border: 1px solid var(--line); color: var(--ink);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.2s;
  overflow: hidden;
}
.en-card:hover { transform: translateY(-3px); border-color: transparent; box-shadow: 0 22px 40px -26px rgba(15, 17, 20, 0.45); }
.en-num { font-family: var(--mono); font-weight: 500; font-size: clamp(1.15rem, 1.8vw, 1.5rem); letter-spacing: -0.02em; word-break: break-all; }
.en-lbl { font-family: var(--display); font-weight: 700; color: var(--accent); font-size: 0.95rem; }
.en-name { font-size: 0.72rem; color: var(--muted); }
.en-card.is-source { background: var(--ink); color: var(--white); border-color: transparent; box-shadow: 0 18px 40px -20px rgba(15, 17, 20, 0.7); }
.en-card.is-source .en-lbl { color: var(--accent-2); }
.en-card.is-source .en-name { color: var(--muted-dark); }
.en-copied {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: rgba(228, 70, 26, 0.94); color: var(--white); font-weight: 600; font-size: 0.9rem;
  opacity: 0; transition: opacity 0.2s; pointer-events: none;
}
.en-card.is-copied .en-copied { opacity: 1; }
.en-note { font-size: 0.8rem; margin-top: 1rem; }

/* One more menu item: tighten the desktop menu so it still fits on one line. */
@media (min-width: 961px) and (max-width: 1280px) {
  .site-nav { gap: 1.1rem; }
  .site-nav a { font-size: 0.88rem; }
}
@media (max-width: 960px) {
  .site-nav.is-open { max-height: 520px; }
  .en { grid-template-columns: 1fr; }
  .en-input { position: static; }
}
@media (max-width: 620px) {
  .en-results { grid-template-columns: 1fr 1fr; gap: 0.5rem; }
  .en-card { padding: 0.9rem; }
  .en-name { display: none; }
  .energy-key { border-radius: 16px; }
}