/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --primary:        #0f172a;
  --primary-light:  #1e293b;
  --primary-mid:    #334155;
  --accent:         #3b82f6;
  --accent-dark:    #2563eb;
  --accent-light:   #93c5fd;
  --success:        #10b981;
  --success-light:  #d1fae5;
  --warning:        #f59e0b;
  --warning-light:  #fef3c7;
  --danger:         #ef4444;
  --danger-light:   #fee2e2;
  --bg:             #f1f5f9;
  --bg-card:        #ffffff;
  --bg-sidebar:     #0f172a;
  --text:           #1e293b;
  --text-secondary: #64748b;
  --text-muted:     #94a3b8;
  --border:         #e2e8f0;
  --border-dark:    #cbd5e1;
  --shadow-sm:      0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.1);
  --shadow:         0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg:      0 10px 25px rgba(0,0,0,.1), 0 4px 10px rgba(0,0,0,.05);
  --radius:         8px;
  --radius-lg:      14px;
  --header-h:       60px;
  --transition:     0.45s cubic-bezier(.4,0,.2,1);
}

/* ── Reset & Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

/* ── Header ─────────────────────────────────────────────────────────────── */
.app-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: var(--primary);
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,.25);
}

.header-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.15rem; font-weight: 700; color: #fff;
  letter-spacing: -.3px;
}
.header-logo-img {
  height: 34px; width: auto;
  filter: brightness(0) invert(1);
  object-fit: contain;
}
.header-brand span { color: #fff; }
.header-brand strong { color: var(--accent-light); }
.header-logo-text {
  font-size: 1.15rem; font-weight: 800; color: #fff;
  letter-spacing: -.5px;
}

.header-timer {
  display: none;
  align-items: center; gap: 8px;
  background: rgba(59,130,246,.15);
  border: 1px solid rgba(59,130,246,.35);
  color: var(--accent-light);
  border-radius: 20px; padding: 4px 14px;
  font-size: .85rem; font-weight: 600;
  margin-left: 12px;
}
.header-timer.visible { display: flex; }
#timerDisplay { font-variant-numeric: tabular-nums; font-size: 1rem; }

/* Waiting banner — shown when another user occupies the optimisation slot */
.header-waiting {
  display: none;
  align-items: center; gap: 10px;
  background: rgba(245, 158, 11, .12);
  border: 1px solid rgba(245, 158, 11, .38);
  color: #fde68a;
  border-radius: 20px; padding: 4px 12px 4px 14px;
  font-size: .82rem; font-weight: 600;
  margin-left: 8px;
}
.header-waiting.visible { display: flex; }
.header-waiting-info { display: flex; align-items: center; gap: 8px; line-height: 1.2; }
.header-waiting-info strong { color: #fcd34d; }
.wait-timer-badge {
  font-variant-numeric: tabular-nums;
  background: rgba(245,158,11,.22);
  border-radius: 10px; padding: 1px 7px;
  font-size: .82rem; color: #fbbf24; font-weight: 700;
}
.header-waiting .btn-icon {
  width: 22px; height: 22px; font-size: .7rem;
  border-radius: 50%; flex-shrink: 0;
  border-color: rgba(245,158,11,.3);
  background: rgba(245,158,11,.1);
  color: #fde68a;
}
.header-waiting .btn-icon:hover { background: rgba(245,158,11,.28); color: #fff; }

.header-spacer { flex: 1; }

.header-actions { display: flex; align-items: center; gap: 10px; }

.user-badge {
  display: flex; align-items: center; gap: 6px;
  color: #94a3b8; font-size: .85rem;
}
.user-badge strong { color: #e2e8f0; }

.btn-icon {
  width: 36px; height: 36px; border-radius: 8px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: #94a3b8; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s, border-color .2s;
  font-size: .9rem;
}
.btn-icon:hover { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.25); }
.btn-icon.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-icon.btn-xs { width: 28px; height: 28px; font-size: .78rem; border-radius: 6px; }

/* ── Workspace layout ────────────────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 1fr 0px;
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
  transition: grid-template-columns var(--transition);
  overflow: hidden;
}
.workspace.split {
  grid-template-columns: 420px 1fr;
}

/* ── Left panel — centered card initially, sidebar when split ────────────── */
.left-panel {
  display: flex; flex-direction: column;
  background: var(--bg-card);
}

/* Initial state: compact centered card */
.workspace:not(.split) .left-panel {
  max-width: 800px;
  width: 100%;
  margin: 24px auto;
  align-self: start;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  overflow: visible;
}

/* Split state: full-height sidebar */
.workspace.split .left-panel {
  max-width: none;
  margin: 0;
  border-radius: 0;
  box-shadow: none;
  border: none;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  max-height: calc(100vh - var(--header-h));
}

/* ── Right panel ─────────────────────────────────────────────────────────── */
.right-panel {
  overflow-y: auto;
  max-height: calc(100vh - var(--header-h));
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition), transform var(--transition);
  background: var(--bg);
  padding: 16px 16px 32px;
}
.workspace.split .right-panel {
  opacity: 1;
  transform: translateX(0);
}

/* ── Panel sections ──────────────────────────────────────────────────────── */
.panel-section {
  padding: 16px 20px;
  flex-shrink: 0;
}
.panel-section + .panel-section {
  border-top: 1px solid var(--border);
}

/* ── 2-column form layout (initial centered state only) ──────────────────── */
.form-cols {
  display: block;
}
.workspace:not(.split) .form-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 28px;
}
.workspace.split .form-cols {
  display: block;
}

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 14px;
}
.section-header h2 {
  font-size: 1rem; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 8px;
}
.section-header h2 i { color: var(--accent); font-size: .9rem; }
.section-header .header-meta { display: flex; align-items: center; gap: 8px; }

/* ── Form controls ───────────────────────────────────────────────────────── */
.form-group { margin-bottom: 12px; }

.form-label {
  display: flex; align-items: center; justify-content: space-between;
  gap: 6px; margin-bottom: 5px;
  font-size: .78rem; font-weight: 600; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: .6px;
}
.form-label i { color: var(--accent); font-size: .75rem; }
.form-label .unit {
  font-weight: 500; color: var(--text-muted); text-transform: lowercase; letter-spacing: 0;
}
.form-label .value-display {
  font-size: .9rem; font-weight: 700; color: var(--accent);
  background: rgba(59,130,246,.08); border-radius: 4px; padding: 1px 7px;
  text-transform: lowercase; letter-spacing: 0;
}

.form-control {
  width: 100%; height: 34px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; color: var(--text);
  padding: 0 10px; font-size: .88rem;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}
.form-control[readonly] { background: var(--bg); color: var(--text-secondary); }

.form-range {
  width: 100%; height: 4px; accent-color: var(--accent);
  cursor: pointer;
}

.form-hint {
  margin-top: 3px; font-size: .72rem; color: var(--text-muted);
  line-height: 1.4;
}
/* Hide hints in split (sidebar) mode to save space */
.workspace.split .form-hint { display: none; }

.sub-label {
  display: block; font-size: .72rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 4px;
}

.input-row {
  display: grid; gap: 10px;
}
.input-row.duo { grid-template-columns: 1fr 1fr; }
.input-row.trio { grid-template-columns: 1fr 1fr 1fr; }

/* ── Demand table ─────────────────────────────────────────────────────────── */
.demand-table {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin-bottom: 8px;
}
.demand-header {
  display: grid; grid-template-columns: 1fr 1fr 36px;
  background: var(--bg); padding: 6px 10px;
  font-size: .72rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px; gap: 8px;
}
.demand-row {
  display: grid; grid-template-columns: 1fr 1fr 36px;
  gap: 8px; padding: 6px 10px; align-items: center;
  border-top: 1px solid var(--border);
  transition: background .15s;
}
.demand-row:hover { background: rgba(59,130,246,.02); }
.demand-row input {
  height: 32px; border: 1px solid var(--border); border-radius: 6px;
  padding: 0 8px; font-size: .88rem; color: var(--text);
  background: #fff; outline: none; width: 100%;
  transition: border-color .2s;
}
.demand-row input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59,130,246,.1); }

.btn-remove {
  width: 28px; height: 28px; border-radius: 6px;
  border: 1px solid var(--border-dark); background: #fff;
  color: var(--danger); cursor: pointer; font-size: 1.1rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s, border-color .2s;
  flex-shrink: 0;
}
.btn-remove:hover { background: var(--danger-light); border-color: var(--danger); }

.btn-add {
  border: 1px dashed var(--border-dark); background: transparent;
  color: var(--accent); border-radius: var(--radius); padding: 6px 12px;
  cursor: pointer; font-size: .82rem; font-weight: 600;
  width: 100%; transition: background .2s, border-color .2s;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.btn-add:hover { background: rgba(59,130,246,.05); border-color: var(--accent); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius);
  padding: 10px 20px; font-size: .9rem; font-weight: 600;
  cursor: pointer; transition: background .2s, transform .1s, box-shadow .2s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { background: var(--accent-dark); box-shadow: 0 4px 12px rgba(59,130,246,.35); }
.btn-primary:active { transform: scale(.98); }
.btn-primary:disabled {
  opacity: .65; cursor: not-allowed; transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: var(--bg); color: var(--text-secondary);
  border: 1px solid var(--border-dark); border-radius: var(--radius);
  padding: 9px 18px; font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: background .2s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { background: var(--border); }

.btn-danger {
  background: var(--danger); color: #fff;
  border: none; border-radius: var(--radius);
  padding: 9px 18px; font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: background .2s;
}
.btn-danger:hover { background: #dc2626; }

.btn-cancel {
  display: inline-flex; align-items: center; gap: 6px;
  background: #f59e0b; color: #fff;
  border: none; border-radius: var(--radius);
  padding: 9px 18px; font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: background .2s;
}
.btn-cancel:hover { background: #d97706; }

.btn-full { width: 100%; justify-content: center; }

.btn-export {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent; border: 1px solid var(--border-dark);
  color: var(--text-secondary); border-radius: 6px;
  padding: 5px 10px; font-size: .78rem; font-weight: 600;
  cursor: pointer; transition: all .2s;
}
.btn-export:hover {
  background: var(--danger-light); color: var(--danger);
  border-color: var(--danger);
}

/* ── Recent Calculations list ─────────────────────────────────────────────── */
.recent-section { flex: 1; min-height: 0; padding-bottom: 8px; }

/* In centered mode: cap the recent section height so the card stays compact */
.workspace:not(.split) .recent-section {
  max-height: 280px;
  overflow-y: auto;
}

.calc-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; margin-bottom: 8px; cursor: pointer;
  background: #fff; transition: border-color .2s, box-shadow .2s, background .2s;
  position: relative;
}
.calc-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-sm);
  background: rgba(59,130,246,.02);
}
.calc-card.active { border-color: var(--accent); background: rgba(59,130,246,.04); }

.calc-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 5px;
}
.calc-card-id {
  font-size: .72rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
}
.calc-card-date { font-size: .72rem; color: var(--text-muted); }

.calc-card-params { font-size: .8rem; color: var(--text-secondary); margin-bottom: 4px; }
.calc-card-params strong { color: var(--text); }

.calc-card-footer {
  display: flex; align-items: center; gap: 8px;
  font-size: .75rem;
}
.calc-card-footer .duration { color: var(--text-muted); margin-left: auto; }

.calc-empty {
  text-align: center; padding: 30px 0;
  color: var(--text-muted); font-size: .85rem;
}
.calc-empty i { font-size: 2rem; display: block; margin-bottom: 8px; opacity: .4; }

/* ── Pagination ───────────────────────────────────────────────────────────── */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; padding: 10px 0 4px;
}
.btn-page {
  width: 30px; height: 30px; border-radius: 6px;
  border: 1px solid var(--border-dark); background: #fff;
  color: var(--text-secondary); cursor: pointer; font-size: .8rem;
  display: flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.btn-page:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-page:disabled { opacity: .4; cursor: not-allowed; }
.page-info { font-size: .8rem; color: var(--text-secondary); font-weight: 600; min-width: 60px; text-align: center; }

/* ── Status badges ────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  border-radius: 20px; padding: 3px 9px; font-size: .72rem; font-weight: 700;
  letter-spacing: .3px;
}
.badge-success  { background: var(--success-light);  color: #065f46; }
.badge-danger   { background: var(--danger-light);   color: #991b1b; }
.badge-warning  { background: var(--warning-light);  color: #92400e; }
.badge-info     { background: rgba(59,130,246,.1);   color: var(--accent-dark); }
.badge-muted    { background: var(--bg);             color: var(--text-muted); border: 1px solid var(--border-dark); }
.status-ok   { color: var(--success); }
.status-fail { color: var(--danger); }

/* ── Progress steps ───────────────────────────────────────────────────────── */
.progress-steps {
  display: flex; flex-direction: column; gap: 4px;
  padding: 4px 0 16px;
}

.step-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 10px 14px; border-radius: 10px;
  transition: background .3s;
}
.step-item.waiting  { opacity: .4; }
.step-item.active   { background: rgba(59,130,246,.06); opacity: 1; }
.step-item.done     { opacity: 1; }

.step-dot {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; margin-top: 2px;
  border: 2px solid var(--border);
  transition: all .3s;
}
.step-item.waiting  .step-dot { border-color: var(--border-dark); color: var(--text-muted); }
.step-item.active   .step-dot { border-color: var(--accent); color: var(--accent); background: rgba(59,130,246,.1); }
.step-item.done     .step-dot { border-color: var(--success); color: var(--success); background: var(--success-light); }

.step-body { flex: 1; min-width: 0; }
.step-name { font-size: .88rem; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.step-detail { font-size: .78rem; color: var(--text-secondary); }
.step-item.waiting .step-name { color: var(--text-muted); }

/* ── Log stream ───────────────────────────────────────────────────────────── */
.log-stream {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  max-height: 220px; overflow-y: auto;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: .75rem;
  line-height: 1.6;
}
.log-stream::-webkit-scrollbar { width: 4px; }
.log-stream::-webkit-scrollbar-track { background: transparent; }
.log-stream::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 2px; }

.log-entry { display: flex; gap: 10px; padding: 1px 0; }
.log-time { color: #4b5563; flex-shrink: 0; }
.log-msg-info     { color: #93c5fd; }
.log-msg-success  { color: #6ee7b7; }
.log-msg-progress { color: #fcd34d; }
.log-msg-error    { color: #fca5a5; }
.log-msg-ping     { color: #374151; }

/* ── Result cards ─────────────────────────────────────────────────────────── */
.result-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); margin-bottom: 16px;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 13px 16px;
  background: var(--bg); border-bottom: 1px solid var(--border);
  font-size: .82rem; font-weight: 700; color: var(--text);
}
.card-header i { color: var(--accent); margin-right: 4px; }
.card-header-meta { display: flex; align-items: center; gap: 8px; }

/* ── Data tables ──────────────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; }

.data-table {
  width: 100%; border-collapse: collapse; font-size: .82rem;
}
.data-table th {
  background: var(--bg); padding: 9px 12px; text-align: left;
  font-size: .71rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.data-table td {
  padding: 9px 12px; border-bottom: 1px solid var(--border);
  color: var(--text); vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover td { background: rgba(59,130,246,.03); }

.data-table .rank-cell {
  font-weight: 800; color: var(--accent); font-size: .9rem; text-align: center;
}
.data-table .mono { font-family: 'Cascadia Code', 'Consolas', monospace; font-size: .8rem; }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }

.data-table .expand-row { background: rgba(59,130,246,.03); }
.data-table .detail-table { width: 100%; }
.data-table .detail-table td { padding: 6px 10px; font-size: .78rem; }
.data-table .detail-table th { font-size: .7rem; padding: 5px 10px; }

.expand-btn {
  background: none; border: 1px solid var(--border-dark); border-radius: 5px;
  color: var(--text-secondary); cursor: pointer; font-size: .75rem;
  padding: 3px 7px; transition: all .2s; white-space: nowrap;
}
.expand-btn:hover { border-color: var(--accent); color: var(--accent); }
.expand-btn.open { background: rgba(59,130,246,.08); border-color: var(--accent); color: var(--accent); }

.demand-ok    { color: var(--success); font-weight: 700; }
.demand-fail  { color: var(--danger);  font-weight: 700; }
.demand-stock { color: var(--accent);  font-weight: 600; }
.demand-scrap { color: var(--warning); font-weight: 600; }
.demand-scrap-stat { color: var(--warning); }

/* ── Recent Calculations list ──────────────────────────────────────────────── */
.recent-section { flex: 1; min-height: 0; padding-bottom: 8px; }

/* Cap height so the left panel doesn’t overflow when not in split mode */
.workspace:not(.split) .recent-section {
  max-height: 260px;
  overflow-y: auto;
}

.calc-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 14px; margin-bottom: 8px; cursor: pointer;
  background: #fff; transition: border-color .2s, box-shadow .2s, background .2s;
}
.calc-card:hover {
  border-color: var(--accent); box-shadow: var(--shadow-sm);
  background: rgba(59,130,246,.02);
}
.calc-card.active { border-color: var(--accent); background: rgba(59,130,246,.04); }

.calc-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px;
}
.calc-card-id   { font-size: .78rem; font-weight: 700; color: var(--text); }
.calc-card-date { font-size: .72rem; color: var(--text-muted); }
.calc-card-params { font-size: .8rem; color: var(--text-secondary); margin-bottom: 4px; }
.calc-card-params strong { color: var(--text); }
.calc-card-footer { display: flex; align-items: center; gap: 6px; font-size: .75rem; flex-wrap: wrap; }
.calc-card-footer .duration { color: var(--text-muted); margin-left: auto; }

.calc-empty {
  text-align: center; padding: 24px 0;
  color: var(--text-muted); font-size: .85rem;
}
.calc-empty i { font-size: 1.8rem; display: block; margin-bottom: 8px; opacity: .35; }

/* ── Coverage compact table ────────────────────────────────────────────────── */
.sol-coverage-section {
  margin-top: 16px;
  padding: 14px 16px 24px;
  border-top: 1px solid var(--border);
}
/* Multi-column wrapper — no longer needed (single table), kept for safety */
.coverage-multi-col {
  display: contents;
}
.coverage-multi-col .coverage-compact {
  flex: 0 0 auto;
}
.coverage-compact {
  font-size: .80rem;
}
.coverage-compact th,
.coverage-compact td { padding: 3px 7px; white-space: nowrap; }
.coverage-compact .cov-width { min-width: 68px; }
/* 3-column layout: fixed widths to keep the table compact */
.coverage-3col { width: auto; }
.coverage-3col .cov-ancho { min-width: 74px; }
.coverage-3col .cov-num   { min-width: 36px; }
.coverage-3col .cov-ok    { width: 18px; padding-left: 2px; }
/* Thin vertical spacer between groups */
.coverage-3col .cov-sep   { width: 10px; background: var(--border); padding: 0; opacity: .35; }
.unit-mm { font-size: .72rem; color: var(--text-muted); }
/* badge for widths outside the sellable range */
.strict-badge {
  display: inline-block;
  margin-left: 4px;
  padding: 0 4px;
  font-size: .65rem;
  font-weight: 700;
  border-radius: 3px;
  background: var(--warning-light);
  color: #92400e;
  vertical-align: middle;
  cursor: help;
}
/* RS surplus shown next to direct-cut count e.g. "5 +12 RS" */
.rs-extra {
  margin-left: 4px;
  color: var(--text-muted);
  font-size: .82em;
}
/* Width produced only via RS (no direct cut) */
.cov-rs-only { color: var(--text-muted); }
.rs-mini-tag {
  margin-left: 3px;
  font-size: .62rem;
  font-weight: 700;
  color: var(--accent);
  opacity: .7;
}

/* ── Modals ───────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(15,23,42,.55); backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fadeIn .2s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); width: 100%;
  max-width: 520px; max-height: 85vh; overflow-y: auto;
  animation: slideUp .25s;
}
.modal-sm { max-width: 380px; }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: #fff; z-index: 1;
}
.modal-header h3 { font-size: 1rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.modal-header h3 i { color: var(--accent); }

.modal-close {
  width: 28px; height: 28px; border-radius: 6px; border: none;
  background: var(--bg); color: var(--text-secondary); cursor: pointer;
  font-size: .85rem; display: flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s;
}
.modal-close:hover { background: var(--danger-light); color: var(--danger); }

.modal-body { padding: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

.modal-section-title {
  font-size: .82rem; font-weight: 700; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: .5px;
  margin: 16px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
.modal-section-title:first-child { margin-top: 0; }

/* ── User list in modal ───────────────────────────────────────────────────── */
.user-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 0; border-bottom: 1px solid var(--border);
}
.user-row:last-child { border-bottom: none; }
.user-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .85rem; flex-shrink: 0;
}
.user-info { flex: 1; min-width: 0; }
.user-name { font-size: .88rem; font-weight: 700; color: var(--text); }
.user-meta { font-size: .74rem; color: var(--text-muted); }

/* ── Toast notifications ──────────────────────────────────────────────────── */
.toast-container {
  position: fixed; bottom: 24px; right: 24px; z-index: 2000;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast {
  max-width: 340px; border-radius: var(--radius);
  padding: 12px 16px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  pointer-events: auto; font-size: .85rem; font-weight: 500;
  animation: toastIn .35s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
}
@keyframes toastIn { from { transform: translateX(110%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
.toast.hide { animation: toastOut .3s forwards; }
@keyframes toastOut { to { transform: translateX(110%); opacity: 0; } }
.toast-success { background: #fff; border-left: 3px solid var(--success); color: var(--text); }
.toast-error   { background: #fff; border-left: 3px solid var(--danger);  color: var(--text); }
.toast-info    { background: #fff; border-left: 3px solid var(--accent);  color: var(--text); }
.toast-warning { background: #fff; border-left: 3px solid var(--warning); color: var(--text); }
.toast i { font-size: 1rem; flex-shrink: 0; }
.toast-success i { color: var(--success); }
.toast-error   i { color: var(--danger); }
.toast-info    i { color: var(--accent); }
.toast-warning i { color: var(--warning); }
.toast-msg { flex: 1; line-height: 1.4; }

/* ── Form check ───────────────────────────────────────────────────────────── */
.form-check { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.form-check-input { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; }
.form-check-label { font-size: .88rem; color: var(--text); cursor: pointer; }

/* ── Result summary strip ─────────────────────────────────────────────────── */
.result-summary {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
}
/* ── Sort bar ─────────────────────────────────────────────────────────────── */
.sort-bar {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  padding: 9px 14px; border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.sort-bar-label {
  font-size: .71rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px; margin-right: 2px;
}
.sort-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-muted);
  font-size: .75rem; font-weight: 600; cursor: pointer;
  transition: all .15s; user-select: none;
}
.sort-chip:hover { border-color: var(--accent); color: var(--accent); }
.sort-chip.asc  { background: rgba(59,130,246,.12); border-color: var(--accent); color: var(--accent); }
.sort-chip.desc { background: rgba(99,102,241,.12); border-color: #6366f1; color: #6366f1; }
.sort-chip.asc::after  { content: ' ↑'; font-size: .7rem; }
.sort-chip.desc::after { content: ' ↓'; font-size: .7rem; }
.sort-priority {
  display: inline-flex; align-items: center; justify-content: center;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: .6rem; font-weight: 800; margin-left: 2px;
}
.sort-chip-reset {
  padding: 4px 8px; border-radius: 20px; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); cursor: pointer;
  font-size: .75rem; transition: all .15s; margin-left: 2px;
}
.sort-chip-reset:hover { color: var(--danger); border-color: var(--danger); }

.summary-pill {
  background: rgba(59,130,246,.08); border: 1px solid rgba(59,130,246,.2);
  border-radius: 20px; padding: 3px 10px;
  font-size: .75rem; font-weight: 600; color: var(--accent-dark);
}

/* ── Scrollbar styling ────────────────────────────────────────────────────── */
.left-panel::-webkit-scrollbar,
.right-panel::-webkit-scrollbar { width: 5px; }
.left-panel::-webkit-scrollbar-track,
.right-panel::-webkit-scrollbar-track { background: transparent; }
.left-panel::-webkit-scrollbar-thumb,
.right-panel::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 3px; }

/* ── Right panel content wrapper ─────────────────────────────────────────── */
.right-content { padding: 20px; }

/* ── Loading spinner ─────────────────────────────────────────────────────── */
.loading-state { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 24px; color: var(--text-muted); font-size: .85rem; }

/* ── Login page ───────────────────────────────────────────────────────────── */
.login-bg {
  min-height: 100vh; background: var(--primary);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  background-image: radial-gradient(ellipse at 20% 50%, rgba(59,130,246,.08) 0%, transparent 55%),
                    radial-gradient(ellipse at 80% 20%, rgba(59,130,246,.05) 0%, transparent 45%);
}
.login-card {
  background: #fff; border-radius: 20px; padding: 40px;
  width: 100%; max-width: 400px; box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.login-logo {
  display: flex; align-items: center; gap: 10px; margin-bottom: 28px;
  justify-content: center;
}
.login-brand-img {
  height: 52px; width: auto; object-fit: contain;
}

.login-title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.login-subtitle { font-size: .83rem; color: var(--text-muted); margin-bottom: 24px; }

.form-input-wrap { position: relative; }
.form-input-wrap input {
  width: 100%; height: 44px;
  border: 1.5px solid var(--border-dark); border-radius: var(--radius);
  background: var(--bg); padding: 0 12px 0 40px;
  font-size: .92rem; color: var(--text); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.form-input-wrap input:focus {
  border-color: var(--accent); background: #fff;
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}
.form-input-wrap .input-icon {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: .85rem; pointer-events: none;
}
.login-label { font-size: .8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; display: block; }
.login-form-group { margin-bottom: 16px; }
#loginError {
  background: var(--danger-light); color: #991b1b; border-radius: var(--radius);
  padding: 10px 14px; font-size: .83rem; margin-bottom: 14px;
  display: none; border: 1px solid #fca5a5;
}
.btn-login {
  width: 100%; height: 44px; background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius); font-size: .95rem; font-weight: 700;
  cursor: pointer; transition: background .2s, transform .1s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-login:hover { background: var(--accent-dark); }
.btn-login:active { transform: scale(.98); }
.btn-login:disabled { opacity: .65; cursor: not-allowed; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .workspace.split {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
  }
  .right-panel { max-height: none; }
}
/* ── Welcome overlay (post-login animation) ───────────────────────── */
.welcome-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: linear-gradient(145deg, #0f172a 0%, #1e3a5f 55%, #2c4159 100%);
  display: flex; align-items: center; justify-content: center;
  animation: wOverlayIn .35s ease-out both;
}
@keyframes wOverlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.welcome-content {
  text-align: center;
  animation: wContentIn .55s cubic-bezier(.22,.68,0,1.2) .1s both;
}
@keyframes wContentIn {
  from { transform: scale(.85); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.welcome-logo-wrap {
  display: flex; justify-content: center; margin-bottom: 20px;
  animation: wLogoIn .6s cubic-bezier(.22,.68,0,1.3) .25s both;
}
@keyframes wLogoIn {
  from { transform: scale(.6) translateY(20px); opacity: 0; }
  to   { transform: scale(1) translateY(0);     opacity: 1; }
}
.welcome-logo-img {
  width: 200px; height: auto;
  filter: brightness(0) invert(1) sepia(1) hue-rotate(190deg) saturate(1.8);
  /* Maintains the orange accent — tweak hue if needed */
  filter: brightness(10);
}

.welcome-greeting {
  font-size: 2.8rem; font-weight: 800; color: #fff;
  letter-spacing: -.5px; line-height: 1.1;
  animation: wSlideUp .5s ease-out .5s both;
}
.welcome-user {
  font-size: 1.6rem; font-weight: 700;
  color: #F4A328;
  margin-top: 6px;
  animation: wSlideUp .5s ease-out .65s both;
}
.welcome-tagline {
  font-size: .9rem; font-weight: 400;
  color: rgba(255,255,255,.55);
  margin-top: 10px; letter-spacing: .2px;
  animation: wSlideUp .5s ease-out .8s both;
}
@keyframes wSlideUp {
  from { transform: translateY(18px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* Progress bar at bottom */
.welcome-bar {
  margin-top: 36px; width: 220px;
  height: 3px; background: rgba(255,255,255,.12);
  border-radius: 4px; overflow: hidden; margin-left: auto; margin-right: auto;
  animation: wSlideUp .5s ease-out .9s both;
}
.welcome-bar-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, #F4A328, #fff);
  border-radius: 4px;
  animation: wBarFill 2.0s ease-in-out 1s both;
}
@keyframes wBarFill {
  from { width: 0%; }
  to   { width: 100%; }
}
/* ── Input validation error ───────────────────────────────────────────────── */
.input-error,
.demand-row input.input-error {
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 2px rgba(239,68,68,.15) !important;
}

/* ── Log header with inline timer ────────────────────────────────────────── */
.log-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 2px 6px;
  font-size: .76rem; font-weight: 600; color: var(--text-muted);
}
.log-header-title { display: flex; align-items: center; gap: 5px; }
.log-header-title i { color: var(--accent); }

.proc-timer {
  display: none;
  align-items: center; gap: 5px;
  background: rgba(59,130,246,.15);
  border: 1px solid rgba(59,130,246,.3);
  color: var(--accent-light);
  border-radius: 14px; padding: 2px 10px;
  font-size: .78rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ── Step name row with elapsed counter ──────────────────────────────────── */
.step-name-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 2px;
}
.step-elapsed {
  font-size: .72rem; font-weight: 600;
  color: var(--accent); background: rgba(59,130,246,.1);
  border-radius: 8px; padding: 1px 6px;
  font-variant-numeric: tabular-nums;
}

/* ── Solution cards ───────────────────────────────────────────────────────── */
.solution-card {
  border-bottom: none;
  margin-bottom: 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.solution-card:last-child { margin-bottom: 0; }
/* Visual divider — no longer the primary separator (margin-bottom on card handles it) */
.sol-card-separator {
  display: none;
}

.solution-card-hdr {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.sol-rank-badge {
  font-size: .9rem; font-weight: 800; color: var(--accent);
  background: rgba(59,130,246,.1); border-radius: 8px;
  padding: 3px 10px; flex-shrink: 0;
}

.sol-stats {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap; flex: 1;
}
.sol-stat {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: .76rem; color: var(--text-secondary);
  font-weight: 500;
}
.sol-stat i { color: var(--text-muted); font-size: .7rem; }

/* Solution detail grid: left (Cutting Configs) | right (Demand Coverage) */
.solution-detail-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 0;
}
.solution-detail-left {
  padding: 12px 14px;
  border-right: 1px solid var(--border);
}
.solution-detail-right {
  padding: 12px 14px;
}

.sol-section-title-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.sol-section-title {
  font-size: .72rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
}

.table-scroll { overflow-x: auto; }
.table-scroll .data-table { font-size: .78rem; }
.table-scroll .data-table td { padding: 6px 10px; }
.table-scroll .data-table th { font-size: .68rem; padding: 5px 10px; }

.solution-detail-right .data-table { font-size: .78rem; }
.solution-detail-right .data-table td { padding: 6px 10px; }
.solution-detail-right .data-table th { font-size: .68rem; padding: 5px 10px; }

/* Download PDF button — eye-catching, placed on the left inside solution card */
.btn-download-pdf {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--danger); color: #fff;
  border: none; border-radius: 6px;
  padding: 5px 12px; font-size: .78rem; font-weight: 700;
  cursor: pointer; transition: background .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn-download-pdf:hover {
  background: #dc2626;
  box-shadow: 0 3px 10px rgba(239,68,68,.35);
}
.btn-download-pdf i { font-size: .75rem; }

@media (max-width: 700px) {
  .solution-detail-grid { grid-template-columns: 1fr; }
  .solution-detail-left { border-right: none; border-bottom: 1px solid var(--border); }
}

/* ── Solution matrix table ────────────────────────────────────────────────── */
.matrix-table {
  border-collapse: collapse;
  width: 100%;
  font-size: .82rem;
}
.matrix-table td {
  padding: 7px 13px;
  border: 1px solid var(--border);
  white-space: nowrap;
}

/* Times + Jumbo Width header rows */
.matrix-row-times td,
.matrix-row-jumbo td {
  background: #475569;
  color: #f1f5f9;
  font-weight: 700;
  text-align: center;
}
.matrix-row-jumbo td { background: #64748b; }
.matrix-row-times .matrix-lbl,
.matrix-row-jumbo .matrix-lbl {
  text-align: left;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  opacity: .9;
}
.matrix-hdr-val {
  min-width: 70px;
  font-variant-numeric: tabular-nums;
}

/* Left label column */
.matrix-lbl {
  background: #93c5fd;
  color: #1e3a5f;
  font-weight: 700;
  font-size: .73rem;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.matrix-roll-lbl { font-size: .71rem; }

/* Data (cut value) cells */
.matrix-cell {
  text-align: center;
  color: var(--text);
  font-weight: 600;
  background: #fff;
  min-width: 70px;
  font-variant-numeric: tabular-nums;
}
.matrix-table tbody tr:nth-child(odd) .matrix-cell  { background: var(--bg); }
.matrix-table tbody tr:nth-child(even) .matrix-cell { background: #fff; }
.matrix-cell-empty {
  background: #f8fafc !important;
}

/* Roll Stock cell inside roll rows */
.matrix-cell-rs {
  background: #e0f2fe !important;
  color: #0369a1;
  font-weight: 700;
}
.rs-tag {
  display: inline-block;
  margin-left: 5px;
  font-size: .65rem;
  font-weight: 800;
  background: #0284c7;
  color: #fff;
  border-radius: 4px;
  padding: 1px 5px;
  letter-spacing: .3px;
  vertical-align: middle;
}

/* Wastage row */
.matrix-row-wastage td {
  background: #fee2e2;
  color: #991b1b;
  font-weight: 700;
  text-align: center;
}
.matrix-row-wastage .matrix-lbl {
  background: #f87171;
  color: #fff;
}
.matrix-wastage-val { font-variant-numeric: tabular-nums; }

/* Eff. Waste row */
.matrix-row-effwaste td {
  background: #fef3c7;
  color: #92400e;
  font-weight: 700;
  text-align: center;
}
.matrix-row-effwaste .matrix-lbl {
  background: #fbbf24;
  color: #78350f;
}
.matrix-effwaste-val { font-variant-numeric: tabular-nums; }

/* Roll Stock summary row */
.matrix-row-rollstock td {
  background: #e0f2fe;
  text-align: center;
  font-weight: 700;
  color: #075985;
}
.matrix-row-rollstock .matrix-lbl {
  background: #38bdf8;
  color: #0c4a6e;
}
.matrix-rs-val {
  font-variant-numeric: tabular-nums;
  font-size: .82rem;
}
.rs-qty {
  font-size: .75rem;
  color: #0369a1;
  font-weight: 600;
  margin-left: 2px;
}
.matrix-rs-empty {
  background: #f0f9ff !important;
}

/* ── Toggle switch ─────────────────────────────────────────────────────────── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: background .2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform .2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(16px); }

/* ── Bobinas Extras section ────────────────────────────────────────────────── */
.sol-extras-section {
  margin-top: 16px;
  padding: 14px 16px 20px;
  border-top: 1px solid var(--border);
}
.extras-table {
  border-collapse: collapse;
  font-size: .80rem;
}
.extras-table th,
.extras-table td {
  padding: 4px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.extras-table thead th {
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-secondary);
  background: var(--bg);
}