/* ── R&D Formulation Portal CSS ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.hidden { display: none !important; }

:root {
  /* Light theme — matches Procurement & QC portals */
  --bg:           #f8fafc;
  --surface:      #ffffff;
  --surface-2:    #f1f5f9;
  --border:       #e2e8f0;
  --border-mid:   #cbd5e1;

  --text:         #0f172a;
  --text-muted:   #475569;
  --text-dim:     #94a3b8;

  --accent:       #2563eb;
  --accent-bg:    rgba(37, 99, 235, 0.06);
  --accent-border:rgba(37, 99, 235, 0.2);
  --accent-hover: #1d4ed8;

  --blue:         #2563eb;
  --blue-bg:      rgba(37, 99, 235, 0.08);
  --blue-border:  rgba(37, 99, 235, 0.25);

  --green:        #16a34a;
  --green-bg:     rgba(22, 163, 74, 0.07);
  --green-border: rgba(22, 163, 74, 0.25);

  --amber:        #d97706;
  --amber-bg:     rgba(217, 119, 6, 0.07);
  --amber-border: rgba(217, 119, 6, 0.25);

  --red:          #dc2626;
  --red-bg:       rgba(220, 38, 38, 0.07);
  --red-border:   rgba(220, 38, 38, 0.25);

  --radius:       12px;
  --radius-sm:    8px;
  --radius-lg:    16px;
  --t:            200ms cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-family: 'Inter', -apple-system, sans-serif; font-size: 14px; }
body { background: var(--bg); color: var(--text); min-height: 100vh; overflow-x: hidden; }

/* ── LAYOUT ───────────────────────────────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px; flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 14px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}
.logo-mark {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; color: #fff;
  letter-spacing: .5px; flex-shrink: 0;
}
.brand-name { font-size: 1rem; font-weight: 700; color: var(--text); }
.brand-sub  { font-size: .75rem; color: var(--text-muted); margin-top: 2px; }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; padding: 16px 12px; flex: 1; }
.nav-label {
  font-size: .7rem; font-weight: 700; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 1px;
  padding: 0 12px; margin: 16px 0 8px;
}
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  cursor: pointer; transition: all var(--t);
  color: var(--text-muted); font-size: .9rem; font-weight: 500;
  border: 1px solid transparent; user-select: none;
}
.nav-item svg { width: 18px; height: 18px; opacity: 0.7; }
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item:hover svg { opacity: 1; }
.nav-item.active {
  color: var(--accent); background: var(--accent-bg);
  border-color: var(--accent-border); font-weight: 600;
}
.nav-item.active svg { opacity: 1; color: var(--accent); }

/* ── MAIN CONTENT ─────────────────────────────────────────────────────────── */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: var(--bg); }

.page-header {
  padding: 24px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0; position: sticky; top: 0; z-index: 10;
}
.page-title { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.page-sub   { font-size: .85rem; color: var(--text-muted); margin-top: 4px; }

.panel { display: none; padding: 32px; overflow-y: auto; flex: 1; }
.panel.active { display: flex; flex-direction: column; gap: 24px; animation: fade In 0.3s ease; }

@keyframes fade { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }

/* ── CARDS ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
  overflow: hidden;
}
.card-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface-2);
}
.card-title { font-size: 1rem; font-weight: 700; color: var(--text); }

/* ── BUTTONS ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 10px 18px; border: none; border-radius: var(--radius-sm);
  font-family: inherit; font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: all var(--t); white-space: nowrap;
}
.btn-primary   { background: var(--accent); color: #fff; box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2); }
.btn-primary:hover   { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3); }
.btn-secondary { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); }
.btn-secondary:hover { background: var(--surface-3, #e2e8f0); border-color: var(--border-mid); transform: translateY(-1px); }
.btn-danger    { background: var(--red-bg); border: 1px solid var(--red-border); color: var(--red); }
.btn-danger:hover { background: var(--red); color: #fff; }
.btn-green     { background: var(--green); color: #fff; box-shadow: 0 2px 8px rgba(22, 163, 74, 0.2); }
.btn-green:hover { background: #15803d; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(22, 163, 74, 0.3); }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ── Component type chip (table badge) ─────────────────────────────────────── */
.comp-type-chip {
  display: inline-block;
  background: var(--chip-bg, #f1f5f9);
  color: #0f172a;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  border: 1px solid rgba(0,0,0,.06);
}
.comp-summary-cell {
  font-size: .78rem;
  color: var(--text-muted);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── INPUTS & FORMS ───────────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: .8rem; font-weight: 600; color: var(--text-muted); }
.field input, .field select, .field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); padding: 10px 12px;
  font-size: .9rem; font-family: inherit;
  transition: all var(--t); outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-dim); }
.field.full { grid-column: 1 / -1; }
.field.span2 { grid-column: span 2; }

/* ── BUILDER META SECTIONS ────────────────────────────────────────────────── */
.meta-section {
  border-bottom: 1px solid var(--border);
  padding: 20px 24px 24px;
}
.meta-section:last-of-type { border-bottom: none; }
.section-label {
  font-size: .8rem; font-weight: 700; color: var(--text);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.meta-grid { display: grid; gap: 20px; }
.meta-grid.g4 { grid-template-columns: repeat(4, 1fr); }
.meta-grid.g3 { grid-template-columns: repeat(3, 1fr); }
.meta-grid .span2 { grid-column: span 2; }

/* Calculated Values */
.calc-section { background: var(--surface-2); }
.calc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.calc-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.calc-item.span2 { grid-column: span 2; }
.calc-label {
  font-size: .75rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px;
}
.calc-value { font-size: 1.1rem; font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.calc-value.accent { color: var(--accent); }
.calc-value.ok     { color: var(--green); }
.calc-value.warn   { color: var(--amber); }
.calc-value.error  { color: var(--red); }

/* ── TABLES ───────────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
table { width: 100%; border-collapse: collapse; font-size: .88rem; text-align: left; }
thead th {
  font-size: .68rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
  padding: 11px 16px; border-bottom: 1px solid var(--border);
  background: var(--surface-2); white-space: nowrap;
}
tbody tr { border-bottom: 1px solid var(--border); transition: background var(--t); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
tbody td { padding: 12px 16px; vertical-align: middle; color: var(--text); }
.mono { font-family: 'JetBrains Mono', monospace; font-size: .85rem; color: var(--text-dim); }

/* Builder Ingredients Table */
.ing-table-wrap { border-top: 1px solid var(--border); overflow-x: auto; }
.ing-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
/* ponytail: the formulation table has ~16 columns; min-width keeps them at
   their set widths so the wrap scrolls instead of letting cells overlap. */
#panel-builder .ing-table { min-width: 1500px; }
.ing-table thead th {
  padding: 12px 16px; font-size: .75rem; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px;
  border-bottom: 1px solid var(--border); background: var(--surface-2);
}
.ing-table tbody tr { border-bottom: 1px solid var(--border); transition: background var(--t); }
.ing-table tbody td { padding: 10px 16px; vertical-align: middle; }
.ing-table tfoot { border-top: 2px solid var(--border); background: var(--surface-2); }
.ing-table tfoot td { padding: 16px; font-weight: 700; font-size: .95rem; }

.num-input {
  width: 100px; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text);
  font-size: .85rem; font-family: inherit; outline: none; text-align: right;
  transition: all var(--t);
}
.num-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12); }
.unit-select {
  padding: 8px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg);
  color: var(--text); font-family: inherit; font-size: .85rem; outline: none;
}
.note-input {
  width: 100%; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text);
  font-size: .85rem; font-family: inherit; outline: none;
}
.ing-bc-tag {
  font-size: .75rem; font-family: 'JetBrains Mono', monospace;
  color: var(--text-dim); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 4px 8px; white-space: nowrap;
}
.remove-row-btn {
  padding: 6px 10px; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted);
  border-radius: var(--radius-sm); cursor: pointer; font-size: .8rem;
  transition: all var(--t);
}
.remove-row-btn:hover { background: var(--red-bg); border-color: var(--red-border); color: var(--red); }

/* Ingredient Search Dropdown */
.ing-search-wrap { position: relative; min-width: 240px; }
.ing-search-wrap input {
  width: 100%; padding: 8px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text);
  font-size: .85rem; font-family: inherit; outline: none;
}
.ing-search-wrap input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12); }
.ing-dropdown {
  display: none; position: fixed; margin-top: 4px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); max-height: 250px; overflow-y: auto;
  z-index: 9000; box-shadow: 0 10px 30px rgba(15,23,42,0.12);
}
.ing-dropdown.open { display: block; }
.ing-opt {
  padding: 10px 14px; cursor: pointer; transition: background var(--t);
  border-bottom: 1px solid var(--border); font-size: .85rem;
}
.ing-opt:last-child { border-bottom: none; }
.ing-opt:hover, .ing-opt.highlighted { background: var(--surface-2); color: var(--accent); }
.ing-opt .opt-name { font-weight: 600; }
.ing-opt .opt-bc { font-size: .75rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

/* ── STATUS PILLS & HELPERS ───────────────────────────────────────────────── */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .75rem; font-weight: 600; padding: 4px 10px;
  border-radius: 999px; border: 1px solid;
}
.pill-draft    { background: var(--amber-bg);  border-color: var(--amber-border);  color: var(--amber); }
.pill-approved { background: var(--green-bg);  border-color: var(--green-border);  color: var(--green); }
.pill-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.total-warn { color: var(--red); font-weight: 700; }
.total-ok   { color: var(--green); }

.builder-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}
.builder-footer-left, .builder-footer-right { display: flex; gap: 12px; }

.state-msg {
  display: flex; flex-direction: column; align-items: center;
  gap: 16px; padding: 64px 24px; color: var(--text-muted); font-size: 1rem;
}
.state-msg.hidden { display: none; }
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── ALERTS / TOASTS ──────────────────────────────────────────────────────── */
.alert { display: none; }
#toastContainer { position: fixed; bottom: 24px; right: 24px; display: flex; flex-direction: column; gap: 12px; z-index: 9999; }
.toast {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); min-width: 300px; max-width: 400px;
  box-shadow: 0 10px 30px rgba(15,23,42,0.12);
  animation: slideIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.toast.out { animation: slideOut 0.3s forwards; }
.toast-icon {
  width: 24px; height: 24px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; flex-shrink: 0; color: #fff;
}
.toast-success { border-color: var(--green-border); }
.toast-success .toast-icon { background: var(--green); }
.toast-error { border-color: var(--red-border); }
.toast-error .toast-icon { background: var(--red); }
.toast-info { border-color: var(--accent-border); }
.toast-info .toast-icon { background: var(--accent); }
.toast-title { font-weight: 700; font-size: .95rem; margin-bottom: 2px; }
.toast-msg { font-size: .85rem; color: var(--text-muted); line-height: 1.4; }

@keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { to { transform: translateX(120%); opacity: 0; } }

/* ── WEIGH-UP SHEET ───────────────────────────────────────────────────────── */
#weighUpSheetPanel { display: none; }
#weighUpSheetPanel.active { display: flex; }

.sheet-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px 48px;
  max-width: 900px; width: 100%; margin: 0 auto;
  box-shadow: 0 4px 16px rgba(15,23,42,0.06);
}
.sheet-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 32px; }
.sheet-company { font-size: 1.4rem; font-weight: 800; color: var(--text); }
.sheet-sub { font-size: .85rem; color: var(--text-muted); margin-top: 4px; }
.sheet-badge {
  font-size: .8rem; font-weight: 700; padding: 6px 16px;
  border-radius: 999px; border: 2px solid var(--accent); color: var(--accent);
  letter-spacing: 1px;
}
.sheet-meta-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 32px;
  padding: 24px; background: var(--bg); border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.sheet-meta-item .sm-label { font-size: .7rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }
.sheet-meta-item .sm-value { font-size: 1rem; font-weight: 600; margin-top: 4px; color: var(--text); }

.sheet-table { width: 100%; border-collapse: collapse; margin-bottom: 40px; font-size: .9rem; }
.sheet-table thead th {
  padding: 12px 16px; text-align: left;
  font-size: .75rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
  border-bottom: 2px solid var(--border-mid);
}
.sheet-table tbody td { padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--text); }
.sheet-table tfoot td { padding: 14px 16px; font-weight: 700; border-top: 2px solid var(--border-mid); font-size: 1rem; }

.sign-row {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 40px; margin-top: 40px; padding-top: 32px;
  border-top: 1px solid var(--border);
}
.sign-item .sign-line {
  border-bottom: 1px solid var(--border-mid); height: 40px; margin-bottom: 8px;
}
.sign-item .sign-label { font-size: .8rem; color: var(--text-muted); }

@media print {
  body { background: #fff; color: #000; }
  .sidebar, .page-header, .builder-footer,
  .btn, .card-header button, #toastContainer, .no-print { display: none !important; }
  .main, .panel, #weighUpSheetPanel { padding: 0 !important; background: #fff !important; }
  .sheet-box { border: none; padding: 0; box-shadow: none; max-width: 100%; background: #fff; }
  .sheet-meta-grid { background: #f9f9f9; border-color: #ddd; }
  .sheet-meta-item .sm-label { color: #555; }
  .sheet-meta-item .sm-value { color: #000; }
  .sheet-table thead th { color: #000; border-bottom-color: #000; }
  .sheet-table tbody td, .sheet-table tfoot td { border-bottom-color: #ccc; }
  .sheet-badge { border-color: #000; color: #000; }
  .sign-item .sign-label { color: #555; }
  .sign-item .sign-line { border-bottom-color: #000; }
  .sheet-section-header td {
    background: #eaeaea !important;
    color: #000 !important;
    font-weight: bold !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

.ing-section { width: 135px; }
.ing-mg-unit { width: 80px; text-align: right; }
.ing-function { width: 110px; }
#fDosageForm { cursor: pointer; }
.span-full { grid-column: 1 / -1 !important; }

/* ── BPR Builder ─────────────────────────────────────────────────────────── */
.bpr-sec {
  border-top: 1px solid var(--border);
}
.bpr-sec-hdr {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background .12s;
}
.bpr-sec-hdr:hover { background: var(--surface-2); }
.bpr-sec-badge {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.bpr-sec-title {
  flex: 1;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
}
.bpr-chevron {
  color: var(--text-muted);
  transition: transform .18s;
  flex-shrink: 0;
}
.bpr-sec.open .bpr-chevron { transform: rotate(180deg); }
.bpr-sec-body {
  display: none;
  padding: 6px 24px 20px;
}
.bpr-sec.open .bpr-sec-body { display: block; }
.bpr-sec-note {
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.5;
}
.bpr-param-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm, 6px);
}
.bpr-param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}
.bpr-param-table thead th {
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: .71rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.bpr-param-table tbody tr { border-bottom: 1px solid var(--border); }
.bpr-param-table tbody tr:last-child { border-bottom: none; }
.bpr-param-table tbody td {
  padding: 7px 12px;
  vertical-align: middle;
  color: var(--text);
}
.bpr-inline-input {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: .82rem;
  font-family: inherit;
  background: transparent;
  color: var(--text);
  transition: border-color .12s, background .12s;
}
.bpr-inline-input:hover, .bpr-inline-input:focus {
  border-color: var(--border);
  background: var(--surface);
  outline: none;
}
.bpr-sop-input {
  display: inline-block;
  width: 130px;
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .75rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}
.bpr-row-del {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  border-radius: 4px;
  line-height: 1;
  font-size: 1rem;
  transition: color .12s;
}
.bpr-row-del:hover { color: var(--red, #dc2626); }
.bpr-row-input {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .82rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}
.bpr-row-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.s3-group-hdr {
  font-size: .71rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 6px 12px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

/* ── MMR Component Preview ─────────────────────────────────────────────────── */
.mmr-comp-preview {
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .82rem;
  min-height: 0;
}
.mmr-comp-preview:empty { display: none; }
.mmr-preview-tag {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* ── Component filter bar ──────────────────────────────────────────────────── */
.comp-filter-bar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  padding: 10px 16px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

/* ── Filter pills (shared by comp panel and MMR section filters) ────────────── */
.filter-pill {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: .72rem;
  font-weight: 500;
  font-family: inherit;
  padding: 4px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
}
.filter-pill:hover {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,.07);
}
.filter-pill.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(37,99,235,.25);
}

/* ── RESPONSIVE ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  /* Sidebar becomes a top bar with horizontally scrolling nav */
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%; height: auto; position: static;
    border-right: none; border-bottom: 1px solid var(--border);
    overflow-y: visible;
  }
  .sidebar-brand { padding: 12px 16px; border-bottom: none; }
  .sidebar-nav {
    flex-direction: row; align-items: center; gap: 6px;
    padding: 0 12px 10px; overflow-x: auto;
    scrollbar-width: none; -webkit-overflow-scrolling: touch;
  }
  .sidebar-nav::-webkit-scrollbar { display: none; }
  .nav-label { display: none; }
  .nav-item { flex-shrink: 0; padding: 8px 12px; font-size: .84rem; }

  .main { overflow: visible; }
  .page-header { padding: 14px 16px; flex-wrap: wrap; gap: 10px; position: static; }
  .panel { padding: 16px; }

  .meta-grid.g4, .meta-grid.g3, .calc-grid, .sheet-meta-grid { grid-template-columns: 1fr 1fr; }
  .sheet-box { padding: 20px; }
  .builder-footer { flex-wrap: wrap; gap: 10px; }
  .builder-footer-left, .builder-footer-right { flex-wrap: wrap; }
}

@media (max-width: 560px) {
  .meta-grid.g4, .meta-grid.g3, .calc-grid, .sheet-meta-grid { grid-template-columns: 1fr; }
  .meta-grid .span2, .field.span2, .calc-item.span2 { grid-column: auto; }
  .sign-row { grid-template-columns: 1fr; gap: 24px; }
  .toast { min-width: 0; max-width: calc(100vw - 32px); }
  #toastContainer { right: 16px; left: 16px; }
}