/* ==========================================================
   Tool Arsenal — interactive grid + detail panel
   ========================================================== */

/* ─── Hero mini-tile mosaic ─── */
.arsenal-mosaic {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 8px; max-width: 360px; margin: 0 auto;
}
.am-tile {
  aspect-ratio: 1; border-radius: 10px;
  background: var(--bg-alt); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--am-color, var(--muted));
  transition: all .35s var(--ease-out);
}
.am-tile:hover { background: white; box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.am-tile svg { width: 18px; height: 18px; }

/* ─── Filter bar (sticky) ─── */
.arsenal-filter {
  position: sticky; top: 70px; z-index: 50;
  margin: 0 auto 28px; max-width: max-content;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border: 1.5px solid var(--border); border-radius: 100px;
  padding: 4px; display: flex; gap: 2px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, border-color .25s;
}
@media (prefers-reduced-transparency: reduce) {
  .arsenal-filter { backdrop-filter: none; background: #fdfdfe; }
}
.arsenal-filter.shadowed { box-shadow: var(--shadow-md); border-color: rgba(15,23,41,.08); }
.arsenal-filter-btn {
  padding: 7px 16px; font-family: var(--font-body);
  font-size: 12px; font-weight: 600; color: var(--slate);
  background: transparent; border: none; border-radius: 100px;
  cursor: pointer; transition: all .25s;
}
.arsenal-filter-btn:hover:not(.active) { color: var(--navy); }
.arsenal-filter-btn.active { background: var(--navy); color: white; box-shadow: var(--shadow-sm); }

@media (max-width: 720px) {
  .arsenal-filter { top: 64px; padding: 3px; flex-wrap: wrap; }
  .arsenal-filter-btn { padding: 6px 11px; font-size: 11px; }
}

/* ─── Tool grid ─── */
.arsenal-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; max-width: 1200px; margin: 0 auto;
  position: relative;
}

@media (max-width: 1080px) { .arsenal-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px) { .arsenal-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .arsenal-grid { grid-template-columns: 1fr; } }

/* ─── Tool card (default state) ─── */
.arsenal-card {
  background: white; border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative; overflow: hidden;
  cursor: pointer;
  transition:
    transform .35s var(--ease-spring),
    box-shadow .35s var(--ease-out),
    border-color .25s,
    opacity .28s var(--ease-out),
    max-height .35s var(--ease-out),
    margin .35s var(--ease-out),
    padding .35s var(--ease-out);
  max-height: 280px;
}
.arsenal-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--tool-color, var(--red));
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease-out);
}
.arsenal-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }
.arsenal-card:hover::before { transform: scaleX(1); }

.arsenal-card-face { padding: 22px 20px; }
.arsenal-card-icon {
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--tool-bg, var(--red-light));
  color: var(--tool-color, var(--red));
  margin-bottom: 14px;
}
.arsenal-card-icon svg { width: 20px; height: 20px; }
.arsenal-card-name {
  font-family: var(--font-display); font-size: 16px; font-weight: 700;
  letter-spacing: -.02em; margin-bottom: 4px;
}
.arsenal-card-line {
  font-size: 12.5px; color: var(--slate); line-height: 1.5; margin-bottom: 14px;
}
.arsenal-card-cta {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  color: var(--tool-color, var(--red));
  letter-spacing: .2em; text-transform: uppercase;
}
.arsenal-card-cta svg { width: 12px; height: 12px; transition: transform .3s var(--ease-spring); }
.arsenal-card:hover .arsenal-card-cta svg { transform: translateX(3px); }

/* Filter dimming */
.arsenal-card.is-filtered-out {
  opacity: .12;
  pointer-events: none;
  transform: scale(.96);
}

/* ─── Active state (one card expands to full row) ─── */
.arsenal-grid.has-active .arsenal-card:not(.is-active) {
  opacity: 0;
  max-height: 0;
  padding: 0;
  margin: 0;
  border-width: 0;
  pointer-events: none;
  overflow: hidden;
}

.arsenal-card.is-active {
  grid-column: 1 / -1;
  cursor: default;
  max-height: 4000px;
  border-color: transparent;
  box-shadow: var(--shadow-xl);
  transform: none;
}
.arsenal-card.is-active::before { transform: scaleX(1); height: 4px; }
.arsenal-card.is-active .arsenal-card-face { display: none; }
.arsenal-card.is-active .arsenal-panel { display: block; }

/* ─── Detail panel (hidden until active) ─── */
.arsenal-panel { display: none; padding: 32px; }

@media (max-width: 600px) { .arsenal-panel { padding: 22px; } }

/* Panel header */
.arsenal-panel-hd {
  display: flex; align-items: center; gap: 16px;
  padding-bottom: 20px; margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}
.arsenal-panel-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--tool-bg, var(--red-light));
  color: var(--tool-color, var(--red));
  flex-shrink: 0;
}
.arsenal-panel-icon svg { width: 28px; height: 28px; }
.arsenal-panel-titles { flex: 1; min-width: 0; }
.arsenal-panel-name {
  font-family: var(--font-display); font-size: 24px; font-weight: 700;
  letter-spacing: -.02em; line-height: 1.15;
}
.arsenal-panel-sub {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  color: var(--muted); letter-spacing: .04em; margin-top: 4px;
}
.arsenal-close {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--bg-alt); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .2s; color: var(--slate);
  flex-shrink: 0;
}
.arsenal-close:hover { background: var(--red-light); border-color: var(--red); color: var(--red); }
.arsenal-close svg { width: 16px; height: 16px; }

/* Core shift highlight */
.arsenal-shift {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 18px; margin-bottom: 24px;
  background: linear-gradient(135deg, var(--tool-bg, var(--red-light)), white);
  border-left: 3px solid var(--tool-color, var(--red));
  border-radius: 8px;
  font-size: 13.5px; font-style: italic;
  color: var(--navy-soft); line-height: 1.55;
}
.arsenal-shift::before {
  content: ''; width: 18px; height: 18px; border-radius: 50%;
  background: var(--tool-color, var(--red));
  flex-shrink: 0; margin-top: 1px;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 12h14M13 6l6 6-6 6'/%3E%3C/svg%3E");
  background-size: 12px; background-position: center; background-repeat: no-repeat;
}

/* Section labels inside panel */
.arsenal-section {
  margin-bottom: 26px;
}
.arsenal-section:last-child { margin-bottom: 0; }
.arsenal-section-label {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  color: var(--tool-color, var(--red));
  letter-spacing: .2em; text-transform: uppercase;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.arsenal-section-label::before {
  content: ''; width: 14px; height: 2px;
  background: var(--tool-color, var(--red)); border-radius: 1px;
}

/* What it is paragraph */
.arsenal-what {
  font-size: 14px; color: var(--navy-soft); line-height: 1.7;
}

/* Top surfaces — list with bold name + description */
.arsenal-surfaces { list-style: none; padding: 0; margin: 0; }
.arsenal-surfaces li {
  padding: 12px 0;
  border-top: 1px solid var(--border-light);
  display: grid; grid-template-columns: minmax(180px, 30%) 1fr; gap: 16px;
  align-items: baseline;
}
.arsenal-surfaces li:first-child { border-top: none; }
.arsenal-surface-name {
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  color: var(--navy); letter-spacing: -.01em;
}
.arsenal-surface-desc { font-size: 12.5px; color: var(--slate); line-height: 1.55; }

@media (max-width: 600px) {
  .arsenal-surfaces li { grid-template-columns: 1fr; gap: 4px; }
}

/* When to use — bullet list */
.arsenal-when { list-style: none; padding: 0; margin: 0; }
.arsenal-when li {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 7px 0; font-size: 13px; color: var(--navy-soft); line-height: 1.55;
}
.arsenal-when li::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--tool-color, var(--red));
  flex-shrink: 0; margin-top: 8px;
}

/* Workflow — numbered list */
.arsenal-workflow { list-style: none; padding: 0; margin: 0; counter-reset: wf; }
.arsenal-workflow li {
  position: relative; padding: 11px 0 11px 42px;
  border-top: 1px solid var(--border-light);
  font-size: 13px; color: var(--navy-soft); line-height: 1.55;
  counter-increment: wf;
}
.arsenal-workflow li:first-child { border-top: none; }
.arsenal-workflow li::before {
  content: counter(wf, decimal-leading-zero);
  position: absolute; left: 0; top: 13px;
  font-family: var(--font-mono); font-weight: 700; font-size: 11px;
  color: var(--tool-color, var(--red));
  letter-spacing: .04em;
}

/* Decision rule — highlighted */
.arsenal-decision {
  padding: 18px 22px;
  background: var(--navy);
  border-radius: 12px;
  color: white; line-height: 1.6;
  font-family: var(--font-display); font-weight: 600; font-size: 14px;
  position: relative;
}
.arsenal-decision::before {
  content: 'Decision rule';
  position: absolute; top: -10px; left: 18px;
  padding: 3px 10px;
  background: var(--tool-color, var(--red));
  font-family: var(--font-mono); font-size: 9px; font-weight: 700;
  letter-spacing: .2em; text-transform: uppercase; color: white;
  border-radius: 4px;
}

/* Do / Don't — 2-column */
.arsenal-dodont {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.arsenal-do, .arsenal-dont {
  padding: 18px; border-radius: 10px;
}
.arsenal-do {
  background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
  border: 1px solid rgba(22,163,74,.18);
}
.arsenal-dont {
  background: linear-gradient(135deg, #fef2f2, #fff7f8);
  border: 1px solid rgba(220,38,38,.18);
}
.arsenal-dd-title {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: .2em; text-transform: uppercase;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 6px;
}
.arsenal-do .arsenal-dd-title { color: #16a34a; }
.arsenal-dont .arsenal-dd-title { color: #dc2626; }
.arsenal-dd-list { list-style: none; padding: 0; margin: 0; }
.arsenal-dd-list li {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 6px 0; font-size: 12.5px; color: var(--navy-soft); line-height: 1.5;
}
.arsenal-do .arsenal-dd-list li::before {
  content: '✓'; color: #16a34a; font-weight: 700; flex-shrink: 0;
}
.arsenal-dont .arsenal-dd-list li::before {
  content: '✕'; color: #dc2626; font-weight: 700; flex-shrink: 0;
}

@media (max-width: 600px) { .arsenal-dodont { grid-template-columns: 1fr; } }

/* Prerequisites */
.arsenal-prereq { list-style: none; padding: 0; margin: 0; }
.arsenal-prereq li {
  padding: 10px 14px; margin-bottom: 6px;
  background: var(--bg-alt); border-radius: 8px;
  font-size: 12.5px; color: var(--navy-soft); line-height: 1.5;
  display: flex; align-items: flex-start; gap: 10px;
}
.arsenal-prereq li::before {
  content: '⚙'; flex-shrink: 0; color: var(--muted); margin-top: 1px;
}

/* Trust pill (re-styles) */
.arsenal-trust {
  display: inline-flex; align-items: flex-start; gap: 8px;
  padding: 12px 16px; background: #f0fdf4;
  border: 1px solid rgba(22,163,74,.18);
  border-radius: 10px;
  font-size: 12.5px; color: #166534; font-weight: 500; line-height: 1.5;
  width: 100%;
}
.arsenal-trust svg { width: 16px; height: 16px; flex-shrink: 0; color: #16a34a; margin-top: 1px; }

/* Footer CTA */
.arsenal-foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 28px; padding-top: 24px;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap; gap: 12px;
}
.arsenal-foot-note {
  font-size: 11.5px; color: var(--muted);
  font-family: var(--font-mono); letter-spacing: .04em;
}
.arsenal-research-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 20px; background: var(--tool-color, var(--red));
  color: white; border-radius: 10px;
  font-family: var(--font-display); font-weight: 600; font-size: 13px;
  transition: all .25s;
}
.arsenal-research-btn:hover {
  background: var(--navy); color: white; transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.arsenal-research-btn svg { width: 14px; height: 14px; transition: transform .3s var(--ease-spring); }
.arsenal-research-btn:hover svg { transform: translate(2px, -2px); }

/* Back to grid pill (top of panel for convenience) */
.arsenal-back-grid {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  color: var(--muted); letter-spacing: .2em; text-transform: uppercase;
  cursor: pointer; padding: 4px 0;
  transition: color .2s;
}
.arsenal-back-grid:hover { color: var(--tool-color, var(--red)); }
.arsenal-back-grid svg { width: 12px; height: 12px; }

/* Empty-state tips */
.arsenal-tips {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
  margin-top: 32px;
}
.arsenal-tip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; background: var(--bg-alt);
  border: 1px solid var(--border); border-radius: 100px;
  font-size: 12px; color: var(--slate); font-weight: 500;
}
.arsenal-tip svg { width: 13px; height: 13px; color: var(--muted); }

.arsenal-grid.has-active ~ .arsenal-tips { display: none; }

/* ─── Day-bridge strip ─── */
.day-bridge {
  display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
  max-width: 1000px; margin: 0 auto;
}
.day-bridge-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; background: white;
  border: 1.5px solid var(--border); border-radius: 100px;
  font-size: 12.5px; color: var(--navy-soft); font-weight: 600;
  transition: all .25s;
}
.day-bridge-chip:hover {
  border-color: var(--chip-color, var(--red));
  color: var(--chip-color, var(--red));
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.day-bridge-num {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  color: var(--chip-color, var(--red)); letter-spacing: .04em;
}

@media (prefers-reduced-motion: reduce) {
  .arsenal-filter,
  .arsenal-filter-btn,
  .arsenal-close,
  .arsenal-back-grid { transition: none !important; }
  .am-tile,
  .am-tile:hover,
  .arsenal-card,
  .arsenal-card:hover,
  .arsenal-card:active,
  .arsenal-card::before,
  .arsenal-card:hover::before,
  .arsenal-card-cta svg,
  .arsenal-card:hover .arsenal-card-cta svg,
  .arsenal-research-btn,
  .arsenal-research-btn:hover,
  .arsenal-research-btn svg,
  .arsenal-research-btn:hover svg,
  .day-bridge-chip,
  .day-bridge-chip:hover { transition: none !important; transform: none !important; }
}