/* ============================================================
   Learnsignal /tools shared brand stylesheet
   Mirrors tokens captured from production signal-lms (port 3000)
   and ls-studio /style-guide (port 3030) on 2026-05-27.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  /* Colour tokens — exact values from signal-lms */
  --background:        #faf9f5;   /* warm cream — body bg */
  --background-card:   #ffffff;   /* white cards */
  --background-muted:  #f0eee8;   /* muted block bg */
  --background-deep:   #000032;   /* dark navy footer / hero bg */
  --foreground:        #000032;   /* dark navy text */
  --secondary:         #000032;   /* same as foreground in LS */
  --muted-foreground:  #4a4844;   /* secondary text */
  --muted:             #ece9df;   /* chip / pill bg */
  --border:            #e6e3d8;   /* subtle borders */
  --border-strong:     #c8c4b6;
  --primary:           #00b67b;   /* brand green */
  --primary-dark:      #009060;
  --primary-soft:      #e8f7f0;
  --primary-soft-2:    rgba(0, 182, 123, 0.08);

  /* State colours */
  --pos:               #16a34a;
  --pos-soft:          #dcfce7;
  --neg:               #dc2626;
  --neg-soft:          #fee2e2;
  --warn:              #d97706;
  --warn-soft:         #fef3c7;
  --info:              #2563eb;
  --info-soft:         #dbeafe;

  /* Typography — Manrope everywhere */
  --font-display:      'Manrope', 'Manrope Fallback', system-ui, sans-serif;
  --font-body:         'Manrope', 'Manrope Fallback', system-ui, sans-serif;
  --font-mono:         'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Radii — LS uses 10px on CTAs, larger on cards */
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;

  /* Shadows — subtle */
  --shadow-sm:  0 1px 2px rgba(0, 0, 50, 0.04);
  --shadow:     0 2px 8px rgba(0, 0, 50, 0.05), 0 1px 2px rgba(0, 0, 50, 0.04);
  --shadow-lg:  0 8px 32px rgba(0, 0, 50, 0.08);

  /* Type scale — matches ls-studio's renderer sizes */
  --text-eyebrow:   12px;
  --text-xs:        12px;
  --text-sm:        14px;
  --text-base:      16px;
  --text-md:        18px;
  --text-lg:        20px;
  --text-xl:        24px;
  --text-2xl:       28px;
  --text-3xl:       32px;
  --text-4xl:       40px;
  --text-5xl:       48px;
}

/* ============================================================
   Reset + base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--foreground);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
}
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

/* ============================================================
   Layout
   ============================================================ */
.ls-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
.ls-page--narrow { max-width: 880px; }
.ls-page--wide   { max-width: 1280px; }

/* Top bar — minimal */
.ls-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.ls-top .ls-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--foreground);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.ls-top .ls-brand-mark {
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
}
.ls-top .ls-back {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--muted-foreground);
  text-decoration: none;
}
.ls-top .ls-back:hover { color: var(--primary-dark); }

/* ============================================================
   Hero / intro section
   ============================================================ */
.ls-hero { margin-bottom: 32px; }
.ls-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--muted);
  color: var(--secondary);
  font-family: var(--font-display);
  font-size: var(--text-eyebrow);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 9999px;
  margin-bottom: 16px;
}
.ls-eyebrow--primary {
  background: var(--primary-soft);
  color: var(--primary-dark);
}
.ls-h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--secondary);
  margin-bottom: 12px;
}
.ls-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--secondary);
  margin-bottom: 12px;
}
.ls-h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  color: var(--secondary);
  margin-bottom: 8px;
}
.ls-lede {
  font-size: var(--text-md);
  color: var(--muted-foreground);
  line-height: 1.6;
  max-width: 720px;
}
.ls-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

/* ============================================================
   Card — the canonical container, mirrors ls-studio renderers
   ============================================================ */
.ls-card {
  position: relative;
  background: var(--background-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.ls-card--canvas {
  padding: 40px;
  min-height: 220px;
}
.ls-card--accent {
  border-left: 4px solid var(--primary);
}
.ls-card--deep {
  background: var(--background-deep);
  color: #fff;
  border: none;
}
.ls-card--deep .ls-h2, .ls-card--deep .ls-h3, .ls-card--deep .ls-h1 { color: #fff; }
.ls-card--deep .ls-lede { color: rgba(255,255,255,0.75); }

/* Brand watermark (corner of every canvas, matches studio) */
.ls-card .ls-watermark {
  position: absolute;
  bottom: 12px;
  right: 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 11px;
  color: var(--muted-foreground);
  opacity: 0.35;
  letter-spacing: -0.01em;
  pointer-events: none;
}
.ls-card .ls-watermark::before {
  content: "";
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--primary);
  border-radius: 2px;
  margin-right: 4px;
  vertical-align: -1px;
  opacity: 0.55;
}

/* ============================================================
   Bullets — green dot + generous text (matches studio text-reveal)
   ============================================================ */
.ls-bullets {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ls-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: var(--text-md);
  line-height: 1.55;
  color: var(--foreground);
}
.ls-bullets li::before {
  content: "";
  flex-shrink: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  margin-top: 11px;
}

/* ============================================================
   Callout — "Why it matters" pattern
   ============================================================ */
.ls-callout {
  border: 1px solid rgba(0, 182, 123, 0.3);
  background: var(--primary-soft-2);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 16px 0;
}
.ls-callout-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 4px;
}
.ls-callout-body {
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--foreground);
}

.ls-callout--warn {
  border-color: var(--warn);
  background: var(--warn-soft);
}
.ls-callout--info {
  border-color: var(--info);
  background: var(--info-soft);
}

/* ============================================================
   CTA — matches signal-lms primary button exactly
   ============================================================ */
.ls-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  line-height: 1.4;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease;
}
.ls-btn:hover { background: var(--primary-dark); }
.ls-btn:active { transform: translateY(1px); }
.ls-btn--lg { padding: 12px 22px; font-size: var(--text-base); }
.ls-btn--ghost {
  background: transparent;
  color: var(--foreground);
  border: 1px solid var(--border-strong);
}
.ls-btn--ghost:hover { background: var(--muted); }
.ls-btn--deep-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
}
.ls-btn--deep-ghost:hover { background: rgba(255,255,255,0.1); }

/* CTA strip — used as the "take the course" footer */
.ls-cta-strip {
  margin-top: 24px;
  padding: 24px 28px;
  background: var(--background-deep);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.ls-cta-strip-text strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  display: block;
  margin-bottom: 2px;
}
.ls-cta-strip-text span {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
}

/* ============================================================
   Form inputs — clean, LS-styled
   ============================================================ */
.ls-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--background-card);
  color: var(--foreground);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.4;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.ls-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.ls-input--mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.ls-textarea { resize: vertical; min-height: 60px; }
.ls-select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1.5 6 6.5l5-5' stroke='%23000032' stroke-width='1.5' fill='none' stroke-linecap='round'/></svg>");
  background-position: right 14px center;
  background-repeat: no-repeat;
  padding-right: 36px;
}
.ls-field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  margin-bottom: 6px;
}

/* ============================================================
   Tables — minimal, LS-style
   ============================================================ */
.ls-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--background-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: var(--text-sm);
}
.ls-table th, .ls-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.ls-table th {
  background: var(--background-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}
.ls-table td.num, .ls-table th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--font-mono); }
.ls-table tr:last-child td { border-bottom: none; }
.ls-table .ls-row-total td { background: var(--primary-soft); font-weight: 700; color: var(--secondary); border-bottom: none; }
.ls-table .ls-row-section td { background: var(--background-muted); font-weight: 700; }

/* ============================================================
   Excel renderer — pin-overlay pattern (mirrors studio)
   ============================================================ */
.ls-excel {
  background: #ffffff;
  border: 1px solid #c1c4ca;
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-family: Calibri, 'Segoe UI', sans-serif;
  font-size: 13px;
  color: #1c1c1c;
  position: relative;
}
.ls-excel-toolbar {
  background: #217346; /* Excel green */
  color: #fff;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  letter-spacing: 0.01em;
}
.ls-excel-toolbar .ls-excel-doc-name { font-family: Calibri, sans-serif; }
.ls-excel-toolbar .ls-excel-doc-meta { opacity: 0.75; font-size: 11px; font-family: var(--font-mono); }
.ls-excel-formula-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f5f5f0;
  border-bottom: 1px solid #c1c4ca;
  padding: 6px 12px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 12.5px;
  color: #1c1c1c;
}
.ls-excel-formula-bar .ls-excel-cell-ref {
  font-family: var(--font-mono);
  color: #555;
  background: #fff;
  border: 1px solid #c1c4ca;
  border-radius: 3px;
  padding: 2px 6px;
  min-width: 36px;
  text-align: center;
  font-size: 11px;
}
.ls-excel-formula-bar .ls-excel-fx { color: #888; font-style: italic; }
.ls-excel-formula-bar .ls-excel-formula { color: #0a6f30; font-weight: 600; word-break: break-all; }
.ls-excel-stage {
  position: relative;
  padding: 0;
}
.ls-excel-grid {
  display: grid;
  font-variant-numeric: tabular-nums;
}
.ls-excel-grid > div {
  padding: 6px 10px;
  border-right: 1px solid #e8e8e3;
  border-bottom: 1px solid #e8e8e3;
  background: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 28px;
}
.ls-excel-grid .row-h {
  background: #f0eee8;
  text-align: center;
  color: #555;
  font-weight: 500;
  font-size: 11.5px;
}
.ls-excel-grid .col-h {
  background: #f0eee8;
  text-align: center;
  color: #555;
  font-weight: 500;
  font-size: 11.5px;
}
.ls-excel-grid .corner {
  background: #e6e3d8;
  border-right: 1px solid #c1c4ca;
  border-bottom: 1px solid #c1c4ca;
}
.ls-excel-grid .num { text-align: right; font-variant-numeric: tabular-nums; }
.ls-excel-grid .bold { font-weight: 700; }
.ls-excel-grid .center { text-align: center; }
.ls-excel-grid .hl-input  { background: #e6f0ff; }
.ls-excel-grid .hl-output { background: #dff7e6; font-weight: 600; }
.ls-excel-grid .hl-formula{ background: #fff4d6; }
.ls-excel-grid .hl-section{ background: #f0eee8; font-weight: 700; }

.ls-excel-tabs {
  display: flex;
  gap: 2px;
  padding: 4px 8px;
  background: #f0eee8;
  border-top: 1px solid #c1c4ca;
}
.ls-excel-tabs span {
  font-size: 11px;
  font-family: Calibri, sans-serif;
  padding: 4px 12px;
  background: #fff;
  border: 1px solid #c1c4ca;
  border-bottom: none;
  border-radius: 3px 3px 0 0;
  color: #1c1c1c;
}
.ls-excel-tabs span.active { font-weight: 700; }

/* Annotation pin overlay on Excel */
.ls-pin {
  position: absolute;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(0,182,123,0.25), 0 2px 6px rgba(0,0,50,0.2);
  transition: transform 0.15s ease;
  z-index: 3;
}
.ls-pin:hover, .ls-pin.is-active { transform: scale(1.15); }

.ls-annot-list {
  margin-top: 14px;
  background: var(--background-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
}
.ls-annot-list ol {
  list-style: none;
  counter-reset: annot;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ls-annot-list li {
  position: relative;
  padding-left: 36px;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--foreground);
}
.ls-annot-list li::before {
  counter-increment: annot;
  content: counter(annot);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}
.ls-annot-list li.is-active { background: var(--primary-soft); border-radius: var(--radius-sm); padding-top: 4px; padding-bottom: 4px; margin-left: -8px; padding-left: 44px; }
.ls-annot-list li strong { display: block; font-weight: 700; color: var(--secondary); margin-bottom: 2px; }

/* ============================================================
   Toast
   ============================================================ */
.ls-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(28px);
  background: var(--background-deep);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.25s ease;
  z-index: 100;
  pointer-events: none;
}
.ls-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================
   Meta footer — tool navigation
   ============================================================ */
.ls-meta {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--muted-foreground);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.ls-meta a { color: var(--muted-foreground); text-decoration: none; border-bottom: 1px dotted currentColor; }
.ls-meta a:hover { color: var(--primary-dark); border-color: var(--primary-dark); }

/* ============================================================
   Two-column tool layout
   ============================================================ */
.ls-two-col { display: grid; grid-template-columns: 1fr 1.4fr; gap: 24px; align-items: flex-start; }
@media (max-width: 880px) { .ls-two-col { grid-template-columns: 1fr; } }

.ls-three-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; align-items: flex-start; }
@media (max-width: 880px) { .ls-three-col { grid-template-columns: 1fr; } }

/* ============================================================
   AI prompt card (when applicable)
   ============================================================ */
.ls-ai {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--background-card);
  margin-top: 16px;
}
.ls-ai-head {
  background: var(--background-deep);
  color: #fff;
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ls-ai-head .ls-ai-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ls-ai-head .ls-ai-badge {
  background: var(--primary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 3px 6px;
  border-radius: 3px;
}
.ls-ai-head .ls-ai-tool {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  background: rgba(255,255,255,0.15);
  padding: 3px 8px;
  border-radius: 9999px;
}
.ls-ai-body { padding: 16px 18px; }
.ls-ai-body pre {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  background: var(--background-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--foreground);
}
.ls-ai-body pre .ph {
  background: var(--primary-soft);
  color: var(--primary-dark);
  padding: 0 4px;
  border-radius: 3px;
  font-weight: 600;
}
.ls-ai-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

/* ============================================================
   Helpers
   ============================================================ */
.ls-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.ls-tabular { font-variant-numeric: tabular-nums; }
.ls-color-pos { color: var(--pos); }
.ls-color-neg { color: var(--neg); }
.ls-color-warn { color: var(--warn); }
.ls-color-muted { color: var(--muted-foreground); }
.ls-rotate-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.ls-chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.ls-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  background: var(--background-card);
  border: 1px solid var(--border-strong);
  border-radius: 9999px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: all 0.12s ease;
}
.ls-chip:hover { border-color: var(--primary); color: var(--primary-dark); }
.ls-chip.is-active { background: var(--primary); border-color: var(--primary); color: #fff; }