/* ── Documentation modal ──────────────────────────────────────────────── */

.docs-modal {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(880px, 100vw - 32px);
  max-height: min(92vh, 860px);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--card);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.docs-modal:not([open]) {
  display: none;
}

.docs-modal::backdrop {
  background: color-mix(in srgb, var(--bg) 64%, transparent 36%);
  backdrop-filter: blur(5px);
}

/* ── Inner scroll wrapper ─────────────────────────────────────────────── */

.docs-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

/* ── Header bar ───────────────────────────────────────────────────────── */

.docs-header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

.docs-header-eyebrow {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2px;
}

.docs-header-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}

.docs-close {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 80%, transparent 20%);
  color: var(--muted);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.docs-close:hover {
  background: var(--accent-weak);
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border) 62%);
  color: var(--accent);
}

.docs-close svg { width: 16px; height: 16px; }

/* ── Scrollable body ──────────────────────────────────────────────────── */

.docs-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 0 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.docs-lead {
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--border);
}

.docs-lead-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.docs-lead-name {
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
  margin: 0 0 8px;
}

.docs-lead-detail {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

.docs-lead-detail a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.docs-lead-detail a:hover {
  color: var(--accent-hover);
}

.docs-lead-role {
  max-width: 72ch;
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ── Author hero block ────────────────────────────────────────────────── */

.docs-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  padding: 18px 0 22px;
  border-bottom: 1px solid var(--border);
}

.docs-hero-card {
  background: color-mix(in srgb, var(--panel) 55%, transparent 45%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
}

.docs-hero-label {
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 5px;
}

.docs-hero-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 3px;
}

.docs-hero-detail {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.docs-hero-detail a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.docs-hero-detail a:hover { color: var(--accent-hover); }

.docs-hero-role {
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.55;
  margin-top: 7px;
  border-top: 1px solid color-mix(in srgb, var(--border) 60%, transparent 40%);
  padding-top: 7px;
}

.docs-hero-role strong { color: var(--text); }

.docs-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.docs-stat-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.docs-stat-val {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1;
}

.docs-stat-unit {
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}

/* ── Sections ─────────────────────────────────────────────────────────── */

.docs-section {
  padding: 22px 0 20px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 65%, transparent 35%);
}

.docs-section:last-of-type {
  border-bottom: none;
}

.docs-section-heading {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

.docs-p {
  font-size: 13px;
  line-height: 1.68;
  color: var(--muted);
  margin: 0 0 9px;
}

.docs-p:last-child { margin-bottom: 0; }

.docs-p strong { color: var(--text); font-weight: 600; }

/* ── Two-column text layout ───────────────────────────────────────────── */

.docs-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 24px;
}

@media (max-width: 560px) {
  .docs-cols { grid-template-columns: 1fr; }
}

/* ── Phase swatches ───────────────────────────────────────────────────── */

.docs-phase-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.docs-phase-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px 5px 7px;
  background: color-mix(in srgb, var(--panel) 70%, transparent 30%);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  transition: background var(--transition-fast);
}

.docs-phase-chip:hover {
  background: color-mix(in srgb, var(--panel) 90%, var(--accent) 10%);
}

.docs-phase-swatch {
  width: 11px;
  height: 11px;
  border-radius: 4px;
  flex: 0 0 11px;
  border: 1px solid color-mix(in srgb, var(--text) 14%, transparent 86%);
}

.docs-phase-desc {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ── Ternary SVG ──────────────────────────────────────────────────────── */

.docs-ternary-wrap {
  display: flex;
  justify-content: center;
  margin: 16px 0 8px;
}

.docs-ternary-svg {
  width: 220px;
  height: auto;
}

/* ── ML model comparison cards ────────────────────────────────────────── */

.docs-model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

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

.docs-model-card {
  background: color-mix(in srgb, var(--panel) 55%, transparent 45%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px 15px;
}

.docs-model-card--deployed {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border) 58%);
  background: color-mix(in srgb, var(--accent-weak) 60%, var(--panel) 40%);
}

.docs-model-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.docs-model-badge {
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  border-radius: 4px;
  padding: 1px 5px;
}

.docs-model-acc {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 3px;
}

.docs-model-unit {
  font-size: 16px;
  font-weight: 700;
}

.docs-model-ci {
  font-size: 11.5px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 6px;
}

.docs-model-note {
  font-size: 10.5px;
  color: var(--muted);
  line-height: 1.5;
  border-top: 1px solid color-mix(in srgb, var(--border) 60%, transparent 40%);
  padding-top: 6px;
  margin-top: 2px;
}

/* ── Feature cards ────────────────────────────────────────────────────── */

.docs-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

@media (max-width: 560px) {
  .docs-features { grid-template-columns: 1fr; }
}

.docs-feature {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  background: color-mix(in srgb, var(--panel) 55%, transparent 45%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 13px;
  transition: background var(--transition-fast);
}

.docs-feature:hover {
  background: color-mix(in srgb, var(--accent-weak) 50%, var(--panel) 50%);
}

.docs-feature-icon {
  color: var(--accent);
  flex: 0 0 auto;
  margin-top: 1px;
}

.docs-feature-icon svg { width: 17px; height: 17px; }

.docs-feature-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 3px;
}

.docs-feature-desc {
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
}

/* ── Citation footer ──────────────────────────────────────────────────── */

.docs-citation {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 18px 0 2px;
  border-top: 1px solid var(--border);
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.55;
}

.docs-citation svg { width: 14px; height: 14px; flex: 0 0 auto; margin-top: 1px; color: var(--accent); }

.docs-citation a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.docs-citation a:hover { color: var(--accent-hover); }

/* ── Header open button ───────────────────────────────────────────────── */

.docs-open-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.docs-open-btn:hover {
  color: var(--accent);
  background: var(--accent-weak);
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border) 62%);
}

.docs-open-btn svg { width: 14px; height: 14px; }

/* ── Guided tour ──────────────────────────────────────────────────────── */

.tour-tooltip {
  position: fixed;
  z-index: 9999;
  width: 320px;
  padding: 18px 20px 14px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--border) 68%);
  box-shadow: var(--shadow-lg), 0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent 90%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.tour-tooltip.tour-visible {
  opacity: 1;
  pointer-events: auto;
}

.tour-counter {
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.tour-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 8px;
}

.tour-body {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
  margin-bottom: 14px;
}

.tour-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.tour-nav {
  display: flex;
  gap: 7px;
}

.tour-skip {
  font-size: 12px;
  color: var(--muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 2px;
  transition: color var(--transition-fast);
}
.tour-skip:hover { color: var(--text); }

.tour-back {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  background: color-mix(in srgb, var(--panel) 80%, transparent 20%);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 11px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.tour-back:hover { background: var(--panel); color: var(--text); }

.tour-next {
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.tour-next:hover { background: var(--accent-hover); }

/* Fixed spotlight ring — positioned over the target via JS getBoundingClientRect */
/* Using a separate fixed element avoids clipping by overflow:hidden on sidebars  */
.tour-spotlight {
  position: fixed;
  z-index: 9998;
  pointer-events: none;
  border: 2px solid transparent;
  border-radius: 8px;
  box-shadow: none;
  transition: left 0.22s ease, top 0.22s ease, width 0.22s ease, height 0.22s ease,
              border-color 0.15s ease, box-shadow 0.15s ease;
}

.tour-spotlight--active {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 24%, transparent 76%);
  animation: tour-spotlight-pulse 1.8s ease-in-out infinite;
}

@keyframes tour-spotlight-pulse {
  0%, 100% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 24%, transparent 76%); }
  50%       { box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 14%, transparent 86%); }
}

.docs-replay-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 0;
}
.docs-replay-btn:hover { color: var(--accent-hover); }