/* ==========================================================================
   INTERPLAST · Sistema Inteligente de Aprovisionamiento
   Diseño SaaS industrial premium — Desktop first
   ========================================================================== */

:root {
  --navy-950: #0b1220;
  --navy-900: #0f1b2d;
  --navy-800: #142842;
  --navy-700: #1c3557;
  --navy-600: #24466f;
  --steel-500: #4a6c8f;
  --steel-300: #8ba3bd;
  --steel-100: #dbe4ee;
  --bg-app: #f3f5f8;
  --bg-panel: #ffffff;
  --bg-soft: #eef2f7;
  --border-soft: #e1e7ee;
  --text-strong: #10192b;
  --text-body: #3b4a5f;
  --text-muted: #7b8aa0;

  --brand: #0e6e5c;
  --brand-dark: #0a5747;
  --brand-light: #d6efe8;
  --brand-glow: rgba(14,110,92,0.14);

  --accent-amber: #b8791a;
  --accent-amber-bg: #fbeed6;
  --accent-red: #c0392b;
  --accent-red-bg: #fbe4e1;
  --accent-blue: #2f6fae;
  --accent-blue-bg: #e2edf8;
  --accent-green: #1f8a5c;
  --accent-green-bg: #e1f3ea;

  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 18px;
  --shadow-card: 0 1px 2px rgba(16,25,43,0.04), 0 6px 20px rgba(16,25,43,0.06);
  --shadow-pop: 0 10px 40px rgba(16,25,43,0.16);
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono-ish: 'Space Grotesk', 'Inter', sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-ui);
  background: var(--bg-app);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  font-size: 14.5px;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-mono-ish); color: var(--text-strong); }
::selection { background: var(--brand-glow); }

/* ---------------------------------------------------------------------- */
/* Layout shell                                                            */
/* ---------------------------------------------------------------------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 252px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--navy-950), var(--navy-900) 60%, var(--navy-800));
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 40;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #12967d);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 17px;
  box-shadow: 0 4px 14px rgba(14,110,92,0.5);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { color: #fff; font-weight: 700; font-family: var(--font-mono-ish); letter-spacing: 0.5px; font-size: 16px; }
.brand-sub { color: #8ea6c2; font-size: 11px; margin-top: 2px; }

.sidebar-nav { flex: 1; padding: 14px 12px; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-s);
  color: #aebfd6; font-size: 13.5px; font-weight: 500;
  margin-bottom: 2px; position: relative;
  transition: background .15s, color .15s;
}
.nav-item i { width: 18px; text-align: center; font-size: 14px; opacity: .85; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: rgba(14,110,92,0.28); color: #fff; }
.nav-item.active::before {
  content: ''; position: absolute; left: -12px; top: 8px; bottom: 8px; width: 3px;
  background: #1fbf9c; border-radius: 3px;
}
.nav-badge {
  margin-left: auto; background: var(--accent-red); color: #fff;
  font-size: 10.5px; font-weight: 700; border-radius: 20px; padding: 1px 7px;
  display: none;
}
.nav-badge.show { display: inline-block; }

.sidebar-footer { padding: 14px 20px 18px; border-top: 1px solid rgba(255,255,255,0.07); }
.powered-by { color: #6f88a6; font-size: 11px; }
.powered-by strong { color: #a7c0da; }

/* ---------------------------------------------------------------------- */
/* Main column / topbar                                                   */
/* ---------------------------------------------------------------------- */
.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 14px 28px; background: var(--bg-panel);
  border-bottom: 1px solid var(--border-soft);
  position: sticky; top: 0; z-index: 30;
}
.mobile-toggle { display: none; background: none; border: none; font-size: 18px; color: var(--text-strong); }
.topbar-title h1 { font-size: 16px; font-weight: 700; letter-spacing: 0.5px; }
.topbar-title p { margin: 1px 0 0; font-size: 11.5px; color: var(--text-muted); }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }

.market-pill {
  display: flex; align-items: center; gap: 7px;
  background: var(--bg-soft); border: 1px solid var(--border-soft);
  padding: 6px 12px; border-radius: 20px; font-size: 12.5px; font-weight: 600; color: var(--text-body);
}
.market-pill i { color: var(--accent-amber); }

.icon-btn {
  position: relative; background: var(--bg-soft); border: 1px solid var(--border-soft);
  width: 36px; height: 36px; border-radius: 50%; color: var(--text-body); font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.icon-btn-badge {
  position: absolute; top: -4px; right: -4px; background: var(--accent-red); color: #fff;
  font-size: 9.5px; font-weight: 700; border-radius: 20px; padding: 1px 5px; min-width: 15px; text-align: center;
}
.user-chip { display: flex; align-items: center; gap: 9px; padding-left: 12px; border-left: 1px solid var(--border-soft); }
.user-avatar {
  width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--navy-700), var(--navy-600));
  color: #fff; font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.user-meta { display: flex; flex-direction: column; line-height: 1.25; }
.user-name { font-size: 12.5px; font-weight: 600; color: var(--text-strong); }
.user-role { font-size: 10.5px; color: var(--text-muted); }

.view-root { padding: 26px 28px 60px; max-width: 1440px; width: 100%; margin: 0 auto; }

/* ---------------------------------------------------------------------- */
/* Page header pattern                                                    */
/* ---------------------------------------------------------------------- */
.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 22px; gap: 20px; flex-wrap: wrap; }
.page-header h2 { font-size: 22px; font-weight: 700; }
.page-header .page-sub { color: var(--text-muted); font-size: 13px; margin-top: 4px; max-width: 640px; }
.page-header-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.breadcrumb a { color: var(--steel-500); font-weight: 600; }
.breadcrumb i { font-size: 9px; }

/* ---------------------------------------------------------------------- */
/* Buttons                                                                */
/* ---------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 16px; border-radius: var(--radius-s); font-size: 13px; font-weight: 600;
  border: 1px solid transparent; transition: all .15s; white-space: nowrap;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-outline { background: #fff; border-color: var(--border-soft); color: var(--text-body); }
.btn-outline:hover { border-color: var(--steel-500); color: var(--text-strong); }
.btn-ghost { background: transparent; color: var(--steel-500); padding: 9px 10px; }
.btn-ghost:hover { color: var(--brand); }
.btn-sm { padding: 6px 11px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------------------------------------------------------------------- */
/* Cards / panels                                                         */
/* ---------------------------------------------------------------------- */
.card {
  background: var(--bg-panel); border: 1px solid var(--border-soft); border-radius: var(--radius-l);
  box-shadow: var(--shadow-card); padding: 20px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; gap: 10px; }
.card-header h3 { font-size: 14.5px; font-weight: 700; }
.card-header-sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.grid { display: grid; gap: 18px; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-12 { grid-template-columns: repeat(12, 1fr); }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-12 { grid-column: span 12; }

/* ---------------------------------------------------------------------- */
/* KPI cards                                                              */
/* ---------------------------------------------------------------------- */
.kpi-card {
  background: var(--bg-panel); border: 1px solid var(--border-soft); border-radius: var(--radius-m);
  padding: 16px 18px; box-shadow: var(--shadow-card); display: flex; flex-direction: column; gap: 8px;
}
.kpi-top { display: flex; align-items: center; justify-content: space-between; }
.kpi-icon { width: 32px; height: 32px; border-radius: 9px; display: flex; align-items: center; justify-content: center; font-size: 13px; }
.kpi-label { font-size: 11.5px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.kpi-value { font-size: 24px; font-weight: 700; color: var(--text-strong); font-family: var(--font-mono-ish); }
.kpi-delta { font-size: 11.5px; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.kpi-delta.up { color: var(--accent-red); }
.kpi-delta.down { color: var(--accent-green); }
.kpi-delta.neutral { color: var(--text-muted); }

/* icon color variants */
.ico-brand { background: var(--brand-light); color: var(--brand-dark); }
.ico-amber { background: var(--accent-amber-bg); color: var(--accent-amber); }
.ico-red { background: var(--accent-red-bg); color: var(--accent-red); }
.ico-blue { background: var(--accent-blue-bg); color: var(--accent-blue); }
.ico-green { background: var(--accent-green-bg); color: var(--accent-green); }

/* ---------------------------------------------------------------------- */
/* Badges / status pills                                                  */
/* ---------------------------------------------------------------------- */
.badge { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 20px; text-transform: uppercase; letter-spacing: .3px; }
.badge-danger { background: var(--accent-red-bg); color: var(--accent-red); }
.badge-warning { background: var(--accent-amber-bg); color: var(--accent-amber); }
.badge-info { background: var(--accent-blue-bg); color: var(--accent-blue); }
.badge-success { background: var(--accent-green-bg); color: var(--accent-green); }
.badge-neutral { background: var(--bg-soft); color: var(--text-muted); }
.badge-lg { font-size: 12.5px; padding: 6px 14px; }

.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.dot-danger { background: var(--accent-red); }
.dot-warning { background: var(--accent-amber); }
.dot-info { background: var(--accent-blue); }
.dot-success { background: var(--accent-green); }

/* ---------------------------------------------------------------------- */
/* Tables                                                                 */
/* ---------------------------------------------------------------------- */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left; padding: 10px 14px; font-size: 11px; text-transform: uppercase; letter-spacing: .4px;
  color: var(--text-muted); font-weight: 700; border-bottom: 1px solid var(--border-soft); white-space: nowrap;
}
.data-table td { padding: 12px 14px; border-bottom: 1px solid var(--border-soft); color: var(--text-body); vertical-align: middle; }
.data-table tbody tr { transition: background .12s; }
.data-table tbody tr:hover { background: var(--bg-soft); cursor: pointer; }
.data-table tbody tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }
.cell-strong { font-weight: 700; color: var(--text-strong); }
.cell-mono { font-family: var(--font-mono-ish); }

/* ---------------------------------------------------------------------- */
/* Filters bar                                                            */
/* ---------------------------------------------------------------------- */
.filters-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; align-items: center; }
.filters-bar select, .filters-bar input[type="text"] {
  border: 1px solid var(--border-soft); border-radius: var(--radius-s); padding: 8px 12px; font-size: 12.5px;
  background: #fff; color: var(--text-body); font-family: inherit;
}
.filters-bar select:focus, .filters-bar input:focus { outline: none; border-color: var(--brand); }
.search-input-wrap { position: relative; }
.search-input-wrap i { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 12px; }
.search-input-wrap input { padding-left: 30px; min-width: 220px; }

/* ---------------------------------------------------------------------- */
/* Recommendation cards                                                   */
/* ---------------------------------------------------------------------- */
.rec-card {
  background: var(--bg-panel); border: 1px solid var(--border-soft); border-left: 4px solid var(--steel-300);
  border-radius: var(--radius-m); padding: 16px 18px; box-shadow: var(--shadow-card); margin-bottom: 12px;
  transition: transform .12s, box-shadow .12s; cursor: pointer;
}
.rec-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-pop); }
.rec-card.border-danger { border-left-color: var(--accent-red); }
.rec-card.border-warning { border-left-color: var(--accent-amber); }
.rec-card.border-info { border-left-color: var(--accent-blue); }
.rec-card.border-success { border-left-color: var(--accent-green); }

.rec-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.rec-name { font-size: 15px; font-weight: 700; color: var(--text-strong); }
.rec-code { font-size: 11px; color: var(--text-muted); font-family: var(--font-mono-ish); }
.rec-metrics { display: flex; gap: 24px; margin-top: 12px; flex-wrap: wrap; }
.rec-metric { display: flex; flex-direction: column; gap: 2px; }
.rec-metric .m-label { font-size: 10.5px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; letter-spacing: .3px; }
.rec-metric .m-value { font-size: 14.5px; font-weight: 700; color: var(--text-strong); font-family: var(--font-mono-ish); }
.rec-confidence-bar { width: 90px; height: 6px; border-radius: 4px; background: var(--bg-soft); overflow: hidden; margin-top: 4px; }
.rec-confidence-fill { height: 100%; border-radius: 4px; background: var(--brand); }

/* ---------------------------------------------------------------------- */
/* Explainability blocks                                                  */
/* ---------------------------------------------------------------------- */
.explain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.explain-col { border-radius: var(--radius-m); padding: 16px; }
.explain-col.pro { background: var(--accent-green-bg); border: 1px solid #bfe3cf; }
.explain-col.contra { background: var(--bg-soft); border: 1px solid var(--border-soft); }
.explain-col h4 { font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; margin-bottom: 10px; }
.explain-col.pro h4 { color: var(--accent-green); }
.explain-col.contra h4 { color: var(--text-muted); }
.explain-list li { display: flex; align-items: flex-start; gap: 8px; font-size: 13px; margin-bottom: 9px; line-height: 1.4; }
.explain-list li i { margin-top: 2px; font-size: 11px; }
.explain-conclusion {
  margin-top: 16px; background: var(--navy-900); color: #fff; padding: 14px 16px; border-radius: var(--radius-m);
  font-size: 13px; display: flex; gap: 10px; align-items: flex-start;
}
.explain-conclusion i { color: #1fbf9c; margin-top: 2px; }

/* ---------------------------------------------------------------------- */
/* Disclaimer                                                             */
/* ---------------------------------------------------------------------- */
.disclaimer {
  display: flex; gap: 10px; align-items: flex-start; background: var(--bg-soft);
  border: 1px dashed var(--border-soft); border-radius: var(--radius-s); padding: 10px 14px;
  font-size: 11.5px; color: var(--text-muted); margin-top: 16px;
}
.disclaimer i { color: var(--steel-500); margin-top: 1px; }
.disclaimer-inline { font-size: 11px; color: var(--text-muted); font-style: italic; margin-top: 8px; }

/* ---------------------------------------------------------------------- */
/* Forms / sliders                                                        */
/* ---------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 12px; font-weight: 700; color: var(--text-strong); }
.field select, .field input[type="number"], .field input[type="date"], .field input[type="text"] {
  border: 1px solid var(--border-soft); border-radius: var(--radius-s); padding: 9px 12px; font-size: 13px; font-family: inherit;
}
.field select:focus, .field input:focus { outline: none; border-color: var(--brand); }
.field-hint { font-size: 11px; color: var(--text-muted); }

.slider-row { margin-bottom: 20px; }
.slider-row-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.slider-row-top label { font-size: 12.5px; font-weight: 700; color: var(--text-strong); }
.slider-value { font-size: 13px; font-weight: 700; font-family: var(--font-mono-ish); color: var(--brand-dark); background: var(--brand-light); padding: 2px 9px; border-radius: 20px; }
input[type="range"] {
  width: 100%; -webkit-appearance: none; height: 6px; border-radius: 4px; background: var(--bg-soft); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--brand);
  border: 3px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.3); cursor: pointer; margin-top: -1px;
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%; background: var(--brand); border: 3px solid #fff; cursor: pointer;
}
.slider-scale { display: flex; justify-content: space-between; font-size: 10px; color: var(--text-muted); margin-top: 4px; }

/* ---------------------------------------------------------------------- */
/* Tabs                                                                   */
/* ---------------------------------------------------------------------- */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border-soft); margin-bottom: 18px; }
.tab-btn {
  background: none; border: none; padding: 10px 16px; font-size: 13px; font-weight: 600; color: var(--text-muted);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab-btn.active { color: var(--brand-dark); border-bottom-color: var(--brand); }
.tab-btn:hover { color: var(--text-strong); }

/* ---------------------------------------------------------------------- */
/* Alerts / feed                                                          */
/* ---------------------------------------------------------------------- */
.alert-item { display: flex; gap: 14px; padding: 14px; border-radius: var(--radius-m); border: 1px solid var(--border-soft); margin-bottom: 10px; background: #fff; }
.alert-icon { width: 36px; height: 36px; border-radius: 9px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 14px; }
.alert-body { flex: 1; }
.alert-title { font-weight: 700; font-size: 13px; color: var(--text-strong); margin-bottom: 3px; }
.alert-text { font-size: 12.5px; color: var(--text-body); line-height: 1.45; }
.alert-meta { font-size: 11px; color: var(--text-muted); margin-top: 6px; display: flex; gap: 12px; }

/* ---------------------------------------------------------------------- */
/* Plan de compras — calendar-ish list                                    */
/* ---------------------------------------------------------------------- */
.plan-column { background: var(--bg-panel); border: 1px solid var(--border-soft); border-radius: var(--radius-l); padding: 16px; }
.plan-column-title { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--text-muted); font-weight: 700; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.plan-item { padding: 12px; border-radius: var(--radius-s); background: var(--bg-soft); margin-bottom: 10px; }
.plan-item-top { display: flex; justify-content: space-between; align-items: center; }
.plan-item-name { font-weight: 700; font-size: 13px; color: var(--text-strong); }
.plan-item-detail { font-size: 12px; color: var(--text-body); margin-top: 5px; }

/* ---------------------------------------------------------------------- */
/* Provider comparison cards                                              */
/* ---------------------------------------------------------------------- */
.provider-card { border: 1px solid var(--border-soft); border-radius: var(--radius-m); padding: 16px; background: #fff; }
.provider-card.selected { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-glow); }
.provider-card-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.provider-flag { width: 30px; height: 30px; border-radius: 8px; background: var(--navy-800); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 12px; }
.provider-metric-row { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--border-soft); font-size: 12.5px; }
.provider-metric-row:last-child { border-bottom: none; }
.provider-metric-row .m-label { color: var(--text-muted); }
.provider-metric-row .m-value { font-weight: 700; color: var(--text-strong); }

/* ---------------------------------------------------------------------- */
/* Misc utility                                                           */
/* ---------------------------------------------------------------------- */
.text-muted { color: var(--text-muted); }
.text-strong { color: var(--text-strong); font-weight: 700; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { display: flex; gap: 10px; align-items: center; }
.chart-box { position: relative; }
.hr-soft { border: none; border-top: 1px solid var(--border-soft); margin: 16px 0; }

.empty-state { text-align: center; padding: 50px 20px; color: var(--text-muted); }
.empty-state i { font-size: 34px; margin-bottom: 12px; color: var(--steel-300); }

/* Fact sheet grid */
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.fact-item { background: var(--bg-soft); border-radius: var(--radius-s); padding: 12px 14px; }
.fact-item .f-label { font-size: 10.5px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; letter-spacing: .3px; }
.fact-item .f-value { font-size: 17px; font-weight: 700; color: var(--text-strong); margin-top: 4px; font-family: var(--font-mono-ish); }
.fact-item.warn { background: var(--accent-amber-bg); }
.fact-item.danger { background: var(--accent-red-bg); }
.fact-item.good { background: var(--accent-green-bg); }

/* Coverage bar */
.coverage-bar-track { height: 10px; border-radius: 6px; background: var(--bg-soft); overflow: hidden; position: relative; }
.coverage-bar-fill { height: 100%; border-radius: 6px; }
.coverage-marker { position: absolute; top: -3px; bottom: -3px; width: 2px; background: var(--navy-900); }

/* Progress-ish confidence ring text */
.confidence-tag { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: 13px; }

/* scrollbar */
.sidebar-nav::-webkit-scrollbar { width: 5px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

/* ---------------------------------------------------------------------- */
/* Materials grid cards                                                   */
/* ---------------------------------------------------------------------- */
.material-card {
  background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius-m); padding: 16px;
  cursor: pointer; transition: transform .12s, box-shadow .12s;
}
.material-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-pop); }
.material-card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }
.material-icon { width: 38px; height: 38px; border-radius: 10px; background: var(--brand-light); color: var(--brand-dark); display: flex; align-items: center; justify-content: center; font-size: 15px; }
.material-name { font-weight: 700; font-size: 14px; color: var(--text-strong); }
.material-family { font-size: 11px; color: var(--text-muted); }
.material-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.material-stat { font-size: 11.5px; }
.material-stat .s-label { color: var(--text-muted); display: block; font-size: 10.5px; text-transform: uppercase; }
.material-stat .s-value { font-weight: 700; color: var(--text-strong); font-size: 13px; }

/* ---------------------------------------------------------------------- */
/* Responsive (still desktop-first, but avoid total breakage on tablet)   */
/* ---------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
  .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .explain-grid { grid-template-columns: 1fr; }
}

@media (max-width: 980px) {
  .sidebar { position: fixed; left: 0; transform: translateX(-100%); transition: transform .2s; height: 100vh; }
  .sidebar.open { transform: translateX(0); }
  .mobile-toggle { display: block; }
  .mobile-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 39; }
  .mobile-overlay.show { display: block; }
  .grid-cols-12 > [class^="col-span"] { grid-column: span 12; }
  .view-root { padding: 18px; }
  .topbar { padding: 12px 16px; }
  .user-meta { display: none; }
}