/* ================================================================
   sdtelc — Subnet Calculator  |  extends main style.css
   ================================================================ */

/* ── Tool hero ───────────────────────────────────────────────────── */
.tool-hero {
  background: var(--g-hero);
  padding: calc(68px + clamp(2.5rem, 6vw, 4rem)) clamp(1.25rem, 6vw, 6%) clamp(2.5rem, 6vw, 4rem);
  text-align: center;
}

.tool-hero .label { color: rgba(255,255,255,0.65); margin-bottom: 0.75rem; }

.tool-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.85rem;
}
.tool-hero-title span { color: var(--c-orange2); }

.tool-hero-sub {
  font-size: clamp(0.88rem, 2vw, 1.05rem);
  color: rgba(255,255,255,0.72);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Main layout ─────────────────────────────────────────────────── */
.tool-main {
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1rem, 4vw, 4%);
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ── Shared card ─────────────────────────────────────────────────── */
.t-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 20px rgba(42,9,36,.07);
  border: 1px solid rgba(142,33,124,.08);
  padding: clamp(1.25rem, 4vw, 2rem);
}

/* ── Calculator card ─────────────────────────────────────────────── */
.calc-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  align-items: end;
}
@media (min-width: 640px) {
  .calc-grid { grid-template-columns: 1fr auto 1fr auto; }
}

.calc-field { display: flex; flex-direction: column; gap: 0.4rem; }

.calc-field label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-mid);
}

.calc-field input[type="text"],
.calc-field input[type="number"] {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  border: 1.5px solid rgba(142,33,124,.22);
  background: #faf8fc;
  color: var(--c-text);
  transition: border-color var(--t), box-shadow var(--t);
  min-height: 48px;
}
.calc-field input:focus {
  outline: none;
  border-color: var(--c-mid);
  box-shadow: 0 0 0 3px rgba(142,33,124,.12);
}
.calc-field input[type="number"] { width: 70px; text-align: center; }

/* Prefix group */
.prefix-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.prefix-slash {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--c-mid);
  line-height: 1;
}
.prefix-badge {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--c-orange);
  min-width: 3rem;
  text-align: left;
}

input[type="range"] {
  flex: 1;
  height: 4px;
  accent-color: var(--c-mid);
  cursor: pointer;
  min-width: 80px;
}
@media (min-width: 640px) {
  input[type="range"] { min-width: 140px; }
}

/* Divider */
.calc-divider {
  display: flex;
  align-items: center;
  padding-bottom: 0.25rem;
}
.calc-divider-line {
  width: 1px;
  height: 48px;
  background: rgba(142,33,124,.15);
}
@media (max-width: 639px) { .calc-divider { display: none; } }

.calc-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
}

/* Error */
.calc-err {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--c-orange);
  font-weight: 600;
  min-height: 1.2em;
}

/* ── Summary grid ────────────────────────────────────────────────── */
.sum-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.5rem;
}
@media (min-width: 640px) {
  .sum-grid { grid-template-columns: repeat(4, 1fr); }
}

.sum-item { display: flex; flex-direction: column; gap: 0.2rem; }

.sum-lbl {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.sum-val {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: clamp(0.82rem, 1.8vw, 0.95rem);
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: 0.02em;
}

/* ── Column toggles ──────────────────────────────────────────────── */
.col-opts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  background: #faf8fc;
  border-radius: 10px;
  border: 1px solid rgba(142,33,124,.1);
}

.col-opts-lbl {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-muted);
  margin-right: 0.25rem;
}

.tog-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  border: 1.5px solid rgba(142,33,124,.2);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-mid);
  cursor: pointer;
  transition: background var(--t), border-color var(--t), color var(--t);
  user-select: none;
}
.tog-pill:has(input:checked) {
  background: rgba(142,33,124,.1);
  border-color: var(--c-mid);
}
.tog-pill input { width: 13px; height: 13px; accent-color: var(--c-mid); cursor: pointer; }

/* ── Table section ───────────────────────────────────────────────── */
.tbl-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tbl-hdr h2 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-deep);
  letter-spacing: -0.01em;
}

.tbl-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Table scroll container */
.tbl-scroll {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid rgba(142,33,124,.1);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  white-space: nowrap;
}

thead { background: var(--c-deep); }
thead th {
  padding: 0.7rem 1rem;
  text-align: left;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.72);
}
thead th.th-bin  { min-width: 300px; }

/* Depth-based row colors */
tbody tr.depth-0  { background: #fff; }
tbody tr.depth-1  { background: #fdf8ff; }
tbody tr.depth-2  { background: #faf3fe; }
tbody tr.depth-3  { background: #f8effe; }
tbody tr.depth-4  { background: #f5eafd; }
tbody tr.depth-5  { background: #f2e5fc; }
tbody tr.depth-6  { background: #efe0fb; }

tbody tr:hover { filter: brightness(0.97); }

tbody td {
  padding: 0.6rem 1rem;
  vertical-align: middle;
  border-bottom: 1px solid rgba(142,33,124,.06);
  color: var(--c-text);
}

/* Subnet cell — left-indented per depth */
.td-sub {
  padding-left: calc(1rem + var(--indent, 0px)) !important;
  position: relative;
}

.chevron {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--c-mid);
  border-bottom: 2px solid var(--c-mid);
  transform: rotate(-45deg) translateY(-1px);
  margin-right: 6px;
  opacity: 0.5;
}

.cidr {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.88rem;
  color: var(--c-deep);
}
.cidr strong { color: var(--c-orange); font-weight: 700; }

.mono {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
  color: var(--c-text);
}

.td-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--c-deep);
}

/* Binary column */
.td-bin {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--c-muted);
  min-width: 270px;
}
.bin-net  { color: var(--c-deep); font-weight: 700; }
.bin-sep  {
  display: inline-block;
  width: 2px;
  height: 12px;
  background: var(--c-orange);
  margin: 0 2px;
  vertical-align: middle;
  border-radius: 1px;
}
.bin-host { color: var(--c-muted); }

/* Action buttons */
.td-act {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  padding-right: 1rem;
}

.act-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: background var(--t), transform var(--t);
  white-space: nowrap;
  min-height: 32px;
}

.act-div {
  background: rgba(233,84,32,.1);
  color: var(--c-orange);
}
.act-div:hover:not(:disabled) {
  background: rgba(233,84,32,.2);
  transform: scale(1.04);
}
.act-div:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.act-join {
  background: rgba(142,33,124,.1);
  color: var(--c-mid);
}
.act-join:hover {
  background: rgba(142,33,124,.2);
  transform: scale(1.04);
}

.act-label { font-size: 0.7rem; opacity: 0.85; }

/* Hint */
.tbl-hint {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--c-muted);
  text-align: center;
}

/* ── Hidden utility ──────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Tool footer ─────────────────────────────────────────────────── */
.tool-footer {
  background: var(--c-deep);
  padding: 1.5rem clamp(1.25rem, 6vw, 6%);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}
.tool-footer a {
  color: rgba(255,255,255,0.65);
  transition: color var(--t);
}
.tool-footer a:hover { color: var(--c-orange2); }

/* ── Buttons (small variant) ─────────────────────────────────────── */
.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.78rem;
  min-height: 36px;
}

/* ── Nav active state for tool page ─────────────────────────────── */
.nav-links a.active { color: var(--c-orange2) !important; }