@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=Rajdhani:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg: #0d0f14;
  --surface: #131720;
  --surface2: #1a2030;
  --surface3: #212840;
  --border: #2a3550;
  --border2: #3a4a6a;
  --accent: #00d4ff;
  --accent2: #ff6b35;
  --accent3: #7fff7f;
  --accent4: #ffcc00;
  --text: #e8edf5;
  --text2: #8899bb;
  --text3: #556688;
  --danger: #ff4455;
  --warn: #ffaa00;
  --success: #00cc66;
  --mono: 'JetBrains Mono', monospace;
  --head: 'Rajdhani', sans-serif;
  --body: 'Inter', sans-serif;
  --radius: 8px;
  --glow: 0 0 20px rgba(0,212,255,0.15);
}

/* Light mode */
body.light-mode {
  --bg: #f0f4f8;
  --surface: #ffffff;
  --surface2: #e8edf5;
  --surface3: #dce4f0;
  --border: #c5d0e0;
  --border2: #a0b0c8;
  --accent: #0077aa;
  --accent2: #cc4400;
  --accent3: #007744;
  --accent4: #996600;
  --text: #1a2540;
  --text2: #445577;
  --text3: #6677aa;
  --danger: #cc1122;
  --warn: #886600;
  --success: #007733;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.2s, color 0.2s;
}

/* ── TOP NAV ── */
#topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,15,20,0.97);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  display: flex; align-items: center;
  padding: 0 16px;
  gap: 4px;
  overflow-x: auto;
  flex-wrap: nowrap;
}
body.light-mode #topnav {
  background: rgba(240,244,248,0.97);
}
#topnav .brand {
  font-family: var(--head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
  padding: 14px 12px 14px 0;
  border-right: 1px solid var(--border);
  margin-right: 8px;
  letter-spacing: 1px;
  cursor: pointer;
  user-select: none;
  transition: opacity 0.15s;
}
#topnav .brand:hover { opacity: 0.8; }
.nav-tab {
  font-family: var(--head);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 14px 12px;
  cursor: pointer;
  border: none;
  background: none;
  color: var(--text2);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  text-transform: uppercase;
}
.nav-tab:hover { color: var(--text); }
.nav-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── TABS ── */
.tab-content { display: none; padding: 24px 20px; max-width: 1200px; margin: 0 auto; }
.tab-content.active { display: block; }

/* ── SHARED ── */
h2 { font-family: var(--head); font-size: 1.6rem; font-weight: 700; color: var(--accent); margin-bottom: 6px; letter-spacing: 1px; }
h3 { font-family: var(--head); font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 12px; letter-spacing: 0.5px; }
h4 { font-family: var(--head); font-size: 0.9rem; font-weight: 600; color: var(--text2); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-title {
  font-family: var(--head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}

select, input[type="text"], input[type="number"], textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--body);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}
select:focus, input:focus, textarea:focus { border-color: var(--accent); }
select option { background: var(--surface2); }

.btn {
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 14px;
  font-family: var(--body);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex; align-items: center; gap: 6px;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: #000; border-color: var(--accent); font-weight: 600; }
.btn.primary:hover { background: #00b8dd; }
.btn.active { background: var(--accent); color: #000; border-color: var(--accent); }
.btn.danger { border-color: var(--danger); color: var(--danger); }

.result-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent3);
  margin-top: 10px;
  position: relative;
}

.copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  color: var(--text2);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 0.72rem;
  cursor: pointer;
  transition: all 0.15s;
}
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.flex-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.flex-wrap { display: flex; gap: 8px; flex-wrap: wrap; }

label { font-size: 0.78rem; color: var(--text2); margin-bottom: 4px; display: block; }

.field { margin-bottom: 12px; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--mono);
  font-weight: 500;
}
.tag-green { background: rgba(0,204,102,0.15); color: var(--success); border: 1px solid rgba(0,204,102,0.3); }
.tag-blue { background: rgba(0,212,255,0.15); color: var(--accent); border: 1px solid rgba(0,212,255,0.3); }
.tag-orange { background: rgba(255,107,53,0.15); color: var(--accent2); border: 1px solid rgba(255,107,53,0.3); }
.tag-red { background: rgba(255,68,85,0.15); color: var(--danger); border: 1px solid rgba(255,68,85,0.3); }
.tag-yellow { background: rgba(255,204,0,0.15); color: var(--accent4); border: 1px solid rgba(255,204,0,0.3); }

.section-toggle {
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; user-select: none;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}
.section-toggle:hover h3 { color: var(--accent); }

.collapsible { overflow: hidden; transition: max-height 0.3s ease; }
.collapsible.closed { max-height: 0 !important; }

.symbol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px,1fr));
  gap: 6px;
  margin-top: 10px;
}
.sym-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.sym-card:hover { border-color: var(--accent); background: var(--surface3); }
.sym-card .sym { font-size: 1.4rem; }
.sym-card .sym-label { font-size: 0.68rem; color: var(--text2); text-align: center; }

.search-bar { position: relative; margin-bottom: 20px; }
.search-bar input { padding-left: 36px; }
.search-bar::before {
  content: '⌕';
  position: absolute; left: 11px; top: 50%;
  transform: translateY(-50%);
  color: var(--text2);
  font-size: 1.1rem;
  pointer-events: none;
}

/* ATEX */
.atex-field-name { font-family: var(--mono); font-size: 0.8rem; color: var(--accent4); }
.atex-field-val { font-size: 0.85rem; }
.atex-field-desc { font-size: 0.8rem; color: var(--text2); }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th { background: var(--surface3); color: var(--text2); padding: 8px 10px; text-align: left; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border2); }
td { padding: 8px 10px; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--surface2); }

/* Gland cards */
.gland-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}
.gland-card-header {
  font-family: var(--head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
  display: flex; align-items: center; justify-content: space-between;
}
.gland-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px,1fr));
  gap: 8px;
  margin-top: 8px;
}
.gland-info-item .key { font-size: 0.7rem; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }
.gland-info-item .val { font-family: var(--mono); font-size: 0.85rem; color: var(--text); margin-top: 2px; }

.pass { color: var(--success); }
.fail { color: var(--danger); }
.warn { color: var(--warn); }

/* IP grid */
.ip-desc-box { background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.ip-digit { font-family: var(--head); font-size: 2.5rem; font-weight: 700; color: var(--accent); }
.ip-title { font-family: var(--head); font-size: 1rem; color: var(--text2); margin-bottom: 8px; }
.ip-detail { font-size: 0.85rem; line-height: 1.6; }

/* Prefix */
.prefix-row { display: flex; align-items: center; gap: 16px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.prefix-sym { font-family: var(--mono); font-size: 1rem; font-weight: 700; color: var(--accent); width: 30px; }
.prefix-name { font-size: 0.82rem; color: var(--text2); width: 80px; }
.prefix-val { font-family: var(--mono); font-size: 0.85rem; color: var(--accent3); flex: 1; }

/* Snippets — 3-column grid */
.snippet-card {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; padding: 12px; padding-top: 28px;
  cursor: pointer; transition: border-color 0.15s; position: relative;
  min-height: 80px;
}
.snippet-card:hover { border-color: var(--accent); }
.snippet-card .snip-title { font-size: 0.8rem; font-weight: 600; color: var(--accent3); margin-bottom: 4px; }
.snippet-card .snip-body { font-size: 0.82rem; color: var(--text); white-space: pre-wrap; word-break: break-word; }
.snippet-del { position: absolute; top: 6px; right: 6px; background: none; border: none; color: var(--text2); cursor: pointer; font-size: 0.9rem; }
.snippet-del:hover { color: var(--danger); }

/* Toast */
#toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--accent); color: #000;
  padding: 8px 18px; border-radius: 6px;
  font-size: 0.82rem; font-weight: 600;
  opacity: 0; transform: translateY(10px);
  transition: all 0.25s; pointer-events: none; z-index: 9999;
}
#toast.show { opacity: 1; transform: translateY(0); }

/* NPT */
.npt-info-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px,1fr)); gap: 10px; margin-top: 12px; }
.npt-info-item { background: var(--surface2); border: 1px solid var(--border); border-radius: 6px; padding: 12px; }
.npt-info-item .key { font-size: 0.7rem; color: var(--text2); text-transform: uppercase; letter-spacing: 0.5px; }
.npt-info-item .val { font-family: var(--mono); font-size: 1rem; font-weight: 600; color: var(--accent); margin-top: 4px; }

.gland-tabs { display: flex; gap: 4px; margin-bottom: 16px; }
.vd-result { font-size: 1.6rem; font-family: var(--head); font-weight: 700; }

/* Drag-reorder */
.drag-handle { cursor: grab; color: var(--text3); font-size: 1rem; margin-right: 6px; user-select: none; }
.drag-handle:active { cursor: grabbing; }
.dragging { opacity: 0.5; }
.drag-over { border-color: var(--accent) !important; background: var(--surface3) !important; }

/* About modal — styled to match brigelectric.com */
#aboutModal {
  display: none; position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  align-items: center; justify-content: center;
}
#aboutModal.show { display: flex; }
#aboutModal .modal-box {
  background: #1e293b;
  border: 1px solid #334155;
  border-top: 3px solid #14b8a6;
  border-radius: 1rem;
  padding: 36px;
  max-width: 540px;
  width: 90%;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
  font-family: ui-sans-serif, system-ui, sans-serif;
}
#aboutModal .be-label {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: #14b8a6; margin-bottom: 12px;
}
#aboutModal .met-title {
  font-size: 2rem; font-weight: 700; color: #2dd4bf;
  letter-spacing: -0.025em; margin-bottom: 4px;
}
#aboutModal .met-subtitle {
  font-size: 0.95rem; color: #94a3b8; margin-bottom: 20px;
}
#aboutModal .modal-divider {
  border: none; border-top: 1px solid #334155; margin: 20px 0;
}
#aboutModal .modal-body-text {
  font-size: 0.9rem; line-height: 1.625; color: #e2e8f0;
}
#aboutModal .disclaimer-box {
  background: rgba(20,184,166,0.08);
  border: 1px solid rgba(20,184,166,0.2);
  border-radius: 0.75rem;
  padding: 16px;
  font-size: 0.8rem; color: #cbd5e1; line-height: 1.7;
}
#aboutModal .disclaimer-box .disc-item { margin-top: 10px; }
#aboutModal .disclaimer-box .disc-item:first-child { margin-top: 0; }
#aboutModal .disc-label-warn  { color: #fbbf24; font-weight: 600; }
#aboutModal .disc-label-atex  { color: #fb7185; font-weight: 600; }
#aboutModal .disc-label-gland { color: #a78bfa; font-weight: 600; }
#aboutModal .modal-footer {
  font-size: 0.75rem; color: #475569; text-align: center;
  font-family: ui-monospace, monospace;
}
#aboutModal .modal-close {
  position: absolute; top: 14px; right: 16px;
  background: none; border: none; color: #475569;
  font-size: 1.2rem; cursor: pointer; transition: color 0.15s;
}
#aboutModal .modal-close:hover { color: #2dd4bf; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* Responsive */
@media (max-width: 768px) {
  .grid2, .grid3 { grid-template-columns: 1fr; }
}

/* ── CALENDAR WIDGET ── */
.cal-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.cal-grid {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}
.cal-dayname {
  text-align: center; font-size: 0.72rem; font-weight: 600;
  color: var(--text3); padding: 4px 0; text-transform: uppercase;
}
.cal-cell {
  text-align: center; padding: 7px 4px;
  font-size: 0.82rem; border-radius: 6px;
  cursor: pointer; transition: all 0.12s;
  border: 1px solid transparent;
}
.cal-cell:hover { background: var(--surface3); border-color: var(--border2); }
.cal-cell.empty { cursor: default; }
.cal-cell.cal-today {
  font-weight: 700; color: var(--accent4);
  border-color: var(--accent4); background: rgba(255,204,0,0.08);
}
.cal-cell.cal-sel1 {
  background: var(--accent); color: #000; font-weight: 700;
  border-color: var(--accent);
}
.cal-cell.cal-sel2 {
  background: var(--accent2); color: #fff; font-weight: 700;
  border-color: var(--accent2);
}
.cal-cell.cal-sel1:hover, .cal-cell.cal-sel2:hover { opacity: 0.85; }
.cal-pick-btns { display: flex; gap: 8px; margin-bottom: 14px; }
.cal-pick-btns .btn.active {
  background: var(--surface3); border-color: var(--accent); color: var(--accent);
}

/* ── DOC NUMBER GENERATOR ── */
.doc-option {
  padding: 8px 12px; cursor: pointer; border-bottom: 1px solid var(--border);
  transition: background 0.1s; display: flex; align-items: center; flex-wrap: wrap; gap: 4px;
}
.doc-option:hover { background: var(--surface3); }
.doc-option:last-child { border-bottom: none; }
#docDropdown {
  position: absolute; z-index: 500; left: 0; right: 0;
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: 6px; box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  max-height: 320px; overflow-y: auto; display: none;
  top: 100%; margin-top: 2px;
}
.doc-search-wrap { position: relative; }

/* ── CABLE / GLAND GENERATOR ── */
.gen-card {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; margin-bottom: 12px;
}
.gen-card .gen-title {
  font-family: var(--head); font-size: 0.95rem; font-weight: 700;
  color: var(--accent2); margin-bottom: 12px; letter-spacing: 0.5px;
}

/* ── PROMPT ENGINEERING ── */
.role-grid {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px;
}
.prompt-formula {
  background: var(--surface3); border: 1px solid var(--border2);
  border-radius: 8px; padding: 14px 18px; margin-bottom: 18px;
  font-size: 0.85rem; line-height: 1.8;
}
.prompt-formula strong { color: var(--accent); }
.prompt-field-label {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text2); margin-bottom: 4px; font-weight: 600;
}
.prompt-field-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: #000;
  font-size: 0.72rem; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

/* ── CALC TAB — PANEL LAYOUT ── */
.calc-list-sidebar {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.calc-list-item {
  padding: 9px 14px;
  font-size: 0.82rem;
  color: var(--text2);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s, color 0.15s;
  line-height: 1.4;
}
.calc-list-item:last-child { border-bottom: none; }
.calc-list-item:hover { background: var(--surface3); color: var(--text); }
.calc-list-item.active {
  background: var(--accent);
  color: #000;
  font-weight: 600;
}
.calc-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.calc-formula {
  margin-top: 16px;
  padding: 8px 12px;
  background: var(--surface3);
  border-left: 3px solid var(--accent2);
  border-radius: 4px;
  font-size: 0.76rem;
  color: var(--text2);
  font-family: var(--mono, monospace);
  line-height: 1.6;
}
.calc-desc-text {
  font-size: 0.83rem;
  color: var(--text2);
  line-height: 1.7;
  margin: 0;
}

/* ── MOTOR DATA TABLE ── */
.motor-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.motor-table th {
  background: var(--surface3);
  color: var(--text2);
  font-weight: 600;
  font-size: 0.74rem;
  text-align: left;
  padding: 7px 10px;
  border-bottom: 2px solid var(--border2);
  white-space: nowrap;
}
.motor-table td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap;
}
.motor-table tr:hover td { background: var(--surface2); }
.motor-table tr.mt-row-mid td { background: var(--surface2); }
.motor-table tr.mt-row-mid:hover td { background: var(--surface3); }
.motor-table tr.mt-row-large td {
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
  font-weight: 500;
}
.motor-table tr.mt-row-large:hover td {
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}

/* ── v3.5 additions ── */
/* Unit converter category/from/to buttons — tighter spacing */
#unitCatBtns .btn, #unitFromBtns .btn, #unitToBtns .btn {
  font-size: 0.8rem;
  padding: 5px 10px;
}

/* SI prefix buttons */
#siPrefixBtns .btn {
  font-size: 0.82rem;
  padding: 5px 12px;
  min-width: 60px;
}

/* Danger button variant */
.btn.danger {
  border-color: var(--danger);
  color: var(--danger);
}
.btn.danger:hover {
  background: var(--danger);
  color: #fff;
}

/* SI prefix active button — ensure text readable against highlight */
#siPrefixBtns .btn.active {
  color: var(--bg) !important;
}