/* Subnet calculator (Field Notes) */
.sc { margin: 1.4rem 0 2.4rem; padding: clamp(16px, 3vw, 26px); border-radius: var(--radius); border: 1px solid var(--line-strong); background: linear-gradient(160deg, #15100c, var(--surface) 60%); box-shadow: 0 30px 80px -50px var(--orange-glow); }
.sc p { text-align: left !important; }
.sc__inputs { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.sc__field { display: flex; flex-direction: column; gap: 6px; flex: 1 1 160px; min-width: 0; }
.sc__field--wide { flex: 3 1 260px; }
.sc__field > span { font: 500 0.7rem var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--orange); }
.sc input[type="text"], .sc input[type="number"], .sc select {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line-strong); background: #0b0b0b; color: var(--text);
  font: 500 1.05rem var(--font-mono); outline: none; transition: border-color 0.2s, box-shadow 0.2s; }
.sc select { font-size: 0.9rem; cursor: pointer; }
.sc input:focus, .sc select:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.15); }
.sc input.is-bad { border-color: #ff5c5c; box-shadow: 0 0 0 3px rgba(255, 92, 92, 0.15); }
.sc__error { margin: 10px 0 0 !important; color: #ff7a7a; font: 0.85rem var(--font-mono); }
.sc__error.is-info { color: var(--muted); }
.sc__note { color: var(--muted); font-size: 0.82rem; padding-bottom: 12px; flex: 2 1 220px; }

/* prefix slider */
.sc__slider { display: flex; align-items: center; gap: 12px; margin: 18px 0 6px; color: var(--dim); font-size: 0.75rem; }
.sc__slider input { flex: 1; -webkit-appearance: none; appearance: none; height: 6px; border-radius: 6px; background: linear-gradient(90deg, var(--orange), #3a2414); outline: none; }
.sc__slider input::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: var(--orange); border: 3px solid #0a0a0a; box-shadow: 0 0 0 2px var(--orange), 0 0 18px var(--orange-glow); cursor: grab; }
.sc__slider input::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--orange); border: 3px solid #0a0a0a; box-shadow: 0 0 0 2px var(--orange); cursor: grab; }

/* binary bits */
.sc__bits { display: flex; align-items: flex-start; justify-content: center; gap: 4px; margin: 18px 0 8px; flex-wrap: nowrap; }
.sc__octet { display: flex; flex-direction: column; align-items: center; gap: 6px; min-width: 0; }
.sc__octet-bits { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 3px; }
.sc__bit { width: clamp(14px, 2.6vw, 26px); height: clamp(26px, 4.4vw, 38px); padding: 0; border-radius: 6px; border: 1px solid var(--line-strong); background: #101010; color: var(--muted); font: 600 clamp(0.62rem, 1.6vw, 0.92rem) var(--font-mono); cursor: pointer; transition: background 0.35s, color 0.35s, border-color 0.35s, transform 0.2s, box-shadow 0.35s; }
.sc__bit:hover { transform: translateY(-2px); border-color: var(--orange); }
.sc__bit.is-net { background: var(--orange); border-color: var(--orange); color: #0a0a0a; }
.sc__bit.is-edge { box-shadow: 4px 0 0 -1px #0a0a0a, 6px 0 0 -1px var(--text); }
.sc__octet-val { color: var(--text); font-size: 0.82rem; }
.sc__dot { color: var(--orange); font: 700 1.3rem var(--font-mono); line-height: clamp(26px, 4.4vw, 38px); }
.sc__legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; font-size: 0.72rem; color: var(--dim); margin-bottom: 16px; }
.sc__legend span::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.sc__legend .is-net::before { background: var(--orange); }
.sc__legend .is-host::before { background: #101010; border: 1px solid var(--line-strong); }
.sc__legend .sc__hint::before { display: none; }

/* where the IP sits in the subnet */
.sc__range { margin: 6px 0 22px; }
.sc__range-track { position: relative; height: 10px; border-radius: 10px; background: #1b1b1b; margin: 34px 0 8px; }
.sc__range-fill { position: absolute; inset: 0; border-radius: 10px; background: linear-gradient(90deg, rgba(255, 107, 0, 0.25), rgba(255, 107, 0, 0.55)); }
.sc__range-pin { position: absolute; top: 50%; width: 16px; height: 16px; margin-left: -8px; transform: translateY(-50%); border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px var(--orange), 0 0 16px var(--orange-glow); transition: left 0.4s cubic-bezier(0.2, 0.7, 0.2, 1); }
.sc__range-pin span { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); white-space: nowrap; font-size: 0.72rem; color: var(--orange); background: #0a0a0a; border: 1px solid rgba(255, 107, 0, 0.4); border-radius: 6px; padding: 2px 7px; }
.sc__range-ends { display: flex; justify-content: space-between; font-size: 0.74rem; color: var(--muted); }

/* result cards */
.sc__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.sc__card { display: flex; flex-direction: column; gap: 6px; padding: 13px 15px; border-radius: 10px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.02); text-align: left; cursor: copy; color: inherit; min-width: 0; transition: border-color 0.2s, background 0.2s; }
.sc__card:hover { border-color: rgba(255, 107, 0, 0.5); background: rgba(255, 107, 0, 0.05); }
.sc__label { font: 500 0.66rem var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--dim); }
.sc__val { font-size: 0.98rem; color: var(--text); overflow-wrap: anywhere; line-height: 1.4; }
.sc__card[data-k="net"] .sc__val, .sc__card[data-k="usable"] .sc__val, .sc__card[data-k="comp"] .sc__val, .sc__card[data-k="cidr"] .sc__val { color: var(--orange); }
.sc__card.is-flash { animation: sc-flash 0.6s ease-out; }
@keyframes sc-flash { from { background: rgba(255, 107, 0, 0.22); } to { background: rgba(255, 255, 255, 0.02); } }

.sc__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.sc__btn { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--line-strong); background: rgba(255, 255, 255, 0.02); color: var(--text); font: 500 0.84rem var(--font-body); cursor: pointer; transition: border-color 0.2s, color 0.2s; }
.sc__btn:hover { border-color: var(--orange); color: var(--orange); }

/* tables inside tools */
.sc__tablewrap { overflow: auto; max-height: 420px; margin-top: 16px; border: 1px solid var(--line); border-radius: 10px; }
.sc__table { width: 100%; min-width: 560px; border-collapse: collapse; font: 0.82rem/1.5 var(--font-mono); }
.sc__table th { position: sticky; top: 0; background: var(--surface-2); color: var(--orange); font-weight: 500; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; text-align: center; padding: 10px 12px; border-bottom: 1px solid var(--line-strong); }
.sc__table td { padding: 8px 12px; border-bottom: 1px solid var(--line); color: #d6d6d6; white-space: nowrap; }
.sc__table tr.is-mine td { background: rgba(255, 107, 0, 0.14); color: #fff; }
.sc__table tr.is-mine td:first-child { box-shadow: inset 3px 0 0 var(--orange); }
.sc__table tr.sc__gap td { text-align: center; color: var(--dim); }

/* VLSM rows + map */
.sc__rows { display: grid; gap: 8px; margin-top: 16px; }
.sc__row { display: grid; grid-template-columns: minmax(0, 1fr) 110px auto 40px; gap: 8px; align-items: center; }
.sc .sc__in { padding: 10px 12px; font-size: 0.95rem; }
.sc__row-unit { color: var(--dim); font-size: 0.75rem; }
.sc__x { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line-strong); background: none; color: var(--muted); font-size: 1.2rem; cursor: pointer; }
.sc__x:hover { color: #ff7a7a; border-color: #ff7a7a; }
.sc__map { margin-top: 18px; }
.sc__map-bar { display: flex; height: 42px; border-radius: 10px; overflow: hidden; border: 1px solid var(--line-strong); background: #111; }
.sc__map-seg, .sc__map-free { position: relative; min-width: 2px; display: flex; align-items: center; justify-content: center; overflow: hidden; transition: width 0.45s cubic-bezier(0.2, 0.7, 0.2, 1); }
.sc__map-seg span, .sc__map-free span { font: 600 0.7rem var(--font-mono); color: #0a0a0a; white-space: nowrap; padding: 0 6px; overflow: hidden; text-overflow: ellipsis; }
.sc__map-seg + .sc__map-seg { box-shadow: inset 1px 0 0 #0a0a0a; }
.sc__map-seg--0 { background: #ff6b00; } .sc__map-seg--1 { background: #ff8f3d; } .sc__map-seg--2 { background: #ffb36b; }
.sc__map-seg--3 { background: #e85d00; } .sc__map-seg--4 { background: #ffcf9e; }
.sc__map-free { background: repeating-linear-gradient(135deg, #151515 0 8px, #1c1c1c 8px 16px); }
.sc__map-free span { color: var(--dim); }
.sc__map-legend { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; margin-top: 8px; font-size: 0.74rem; color: var(--muted); }
.sc__swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 8px; vertical-align: -1px; }

/* IPv6 nibbles */
.sc__nibbles { display: flex; flex-wrap: wrap; justify-content: center; row-gap: 6px; column-gap: 1px; margin: 18px 0 18px; font: 600 clamp(0.72rem, 1.9vw, 1rem) var(--font-mono); }
.sc__hextet { display: inline-flex; gap: 2px; }
.sc__nib { display: inline-grid; place-items: center; width: clamp(14px, 1.5vw, 19px); height: clamp(24px, 3.6vw, 32px); border-radius: 5px; background: #101010; border: 1px solid var(--line-strong); color: var(--muted); transition: background 0.35s, color 0.35s, border-color 0.35s; }
.sc__nib.is-net { background: var(--orange); border-color: var(--orange); color: #0a0a0a; }
.sc__nib.is-part { background: linear-gradient(90deg, var(--orange) 50%, #101010 50%); border-color: var(--orange); color: #fff; }
.sc__colon { color: var(--orange); align-self: center; padding: 0 1px; }

/* copied toast */
.sc-toast { position: fixed; left: 50%; bottom: 28px; z-index: 400; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; padding: 10px 18px; border-radius: 999px; background: var(--orange); color: #0a0a0a; font: 600 0.85rem var(--font-body); box-shadow: 0 12px 40px -10px var(--orange-glow); transition: opacity 0.25s, transform 0.25s; }
.sc-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 600px) {
  .sc__row { grid-template-columns: minmax(0, 1fr) 84px 40px; }
  .sc__row-unit { display: none; }
  .sc__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .sc__bits { gap: 2px; }
  .sc__octet-bits { gap: 2px; }
  .sc__bit { width: 9.4px; border-radius: 3px; font-size: 0.56rem; }
}
@media (max-width: 380px) { .sc__grid { grid-template-columns: minmax(0, 1fr); } }
@media print {
  .sc { background: #fff !important; border-color: #ccc !important; box-shadow: none !important; break-inside: avoid; }
  .sc__slider, .sc__actions, .sc__rows, .sc__legend .sc__hint, .sc-toast { display: none !important; }
  .sc__card { border-color: #ddd !important; }
  .sc__val, .sc__octet-val, .sc__table td { color: #111 !important; }
  .sc__bit, .sc__nib { background: #fff !important; color: #333 !important; border-color: #bbb !important; }
  .sc__bit.is-net, .sc__nib.is-net { background: #ffd9bd !important; color: #000 !important; }
}
.sc.is-stale .sc__grid, .sc.is-stale .sc__bits, .sc.is-stale .sc__nibbles, .sc.is-stale .sc__range { opacity: 0.35; filter: grayscale(0.6); transition: opacity 0.2s; }
.sc__range-pin.is-start span { left: -6px; transform: none; }
.sc__range-pin.is-end span { left: auto; right: -6px; transform: none; }