/* =========================================================================
   dz-hub.css — Discovery Zone Landing Hub (P5 Sprint 9)
   Hub landing section, wing entry cards, first-timer banner,
   tri-guna legend (bottom-right collapsible), and About slide-over panel.

   Brand palette:
     Ocean Blue   #0D3B6E
     Forest Green #2D6A4F
     Sand Gold    #C8963E
   Responsive breakpoints: desktop 1440px, tablet 768px, mobile 390px
   ========================================================================= */

:root {
  --dz-ocean: #0D3B6E;
  --dz-forest: #2D6A4F;
  --dz-gold: #C8963E;
  --dz-ocean-dk: #0A2D54;
  --dz-gold-dk: #A9782C;
  --dz-forest-dk: #21503B;
  --dz-ink: #1B2430;
  --dz-muted: #5A6673;
  --dz-line: #E3E8EE;
  --dz-bg-soft: #F6F8FB;
  --dz-white: #FFFFFF;
  /* Tri-guna key colors (align with guna.css) */
  --dz-guna-coherent: #C0392B; /* 3 brackets — Coherent (Thama) — RED */
  --dz-guna-resonant: #27AE60; /* 2 brackets — Resonant (Raja) — GREEN */
  --dz-guna-expansive: #1565C0; /* 1 bracket — Expansive (Sathwa) — BLUE */
  --dz-radius: 14px;
  --dz-shadow-sm: 0 2px 8px rgba(13, 59, 110, 0.08);
  --dz-shadow-md: 0 6px 22px rgba(13, 59, 110, 0.12);
  --dz-shadow-lg: 0 16px 48px rgba(10, 45, 84, 0.28);
}

/* -------------------------------------------------------------------------
   Hub section
   ------------------------------------------------------------------------- */
.dz-hub {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--dz-bg-soft) 100%);
  border-bottom: 1px solid var(--dz-line);
  padding: 40px 0 46px;
}

.dz-hub .wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.dz-hub-mission {
  font-family: var(--serif, Georgia, serif);
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  line-height: 1.35;
  color: var(--dz-ocean);
  font-weight: 700;
  max-width: 900px;
  margin: 0 0 6px;
}

.dz-hub-mission em {
  color: var(--dz-forest);
  font-style: italic;
}

.dz-hub-subline {
  font-size: 1rem;
  color: var(--dz-muted);
  margin: 0 0 24px;
  max-width: 720px;
}

/* -------------------------------------------------------------------------
   Global toolbar (search + settings gear + display toggle pill)
   ------------------------------------------------------------------------- */
.dz-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 0 0 28px;
}

.dz-search {
  position: relative;
  flex: 1 1 340px;
  min-width: 240px;
  max-width: 520px;
}

.dz-search-input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 16px 12px 42px;
  font-size: 1rem;
  font-family: var(--sans, "Source Sans 3", sans-serif);
  color: var(--dz-ink);
  background: var(--dz-white);
  border: 2px solid var(--dz-line);
  border-radius: 999px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.dz-search-input:focus {
  outline: none;
  border-color: var(--dz-ocean);
  box-shadow: 0 0 0 4px rgba(13, 59, 110, 0.14);
}

.dz-search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--dz-forest);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

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

/* Display-mode toggle pill container — DisplayMode.init fills #dz-display-toggle */
.dz-display-toggle {
  display: inline-flex;
}

/* Settings gear button in the hub toolbar */
.dz-settings-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--dz-white);
  border: 2px solid var(--dz-line);
  color: var(--dz-ocean);
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.dz-settings-btn:hover {
  background: var(--dz-bg-soft);
  border-color: var(--dz-ocean);
}

.dz-settings-btn:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

.dz-settings-btn:active {
  transform: scale(0.94);
}

/* About DZ button */
.dz-about-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--dz-ocean);
  color: #fff;
  border: 2px solid var(--dz-ocean);
  font-family: var(--sans, "Source Sans 3", sans-serif);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
}

.dz-about-btn:hover {
  background: var(--dz-ocean-dk);
}

.dz-about-btn:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

/* User Guide button (same styling as About) */
.dz-userguide-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--dz-ocean);
  color: #fff;
  border: 2px solid var(--dz-ocean);
  font-family: var(--sans, "Source Sans 3", sans-serif);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
}

.dz-userguide-btn:hover {
  background: var(--dz-ocean-dk);
}

.dz-userguide-btn:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

/* SSRG PDF button (link styled as button) */
.dz-ssrg-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--dz-forest);
  color: #fff;
  border: 2px solid var(--dz-forest);
  font-family: var(--sans, "Source Sans 3", sans-serif);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
}

.dz-ssrg-btn:hover {
  background: var(--dz-forest-dk);
}

.dz-ssrg-btn:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

/* -------------------------------------------------------------------------
   First-timer banner
   ------------------------------------------------------------------------- */
.dz-firsttimer {
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(90deg, rgba(45, 106, 79, 0.10), rgba(200, 150, 62, 0.12));
  border: 1px solid rgba(45, 106, 79, 0.35);
  border-left: 5px solid var(--dz-forest);
  border-radius: var(--dz-radius);
  padding: 14px 18px;
  margin: 0 0 26px;
}

.dz-firsttimer[hidden] {
  display: none;
}

.dz-firsttimer-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.dz-firsttimer-body {
  flex: 1 1 auto;
}

.dz-firsttimer-kicker {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dz-forest);
  font-weight: 700;
  margin-bottom: 2px;
}

.dz-firsttimer-link {
  color: var(--dz-ocean);
  font-weight: 700;
  font-size: 1.02rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.18s ease;
}

.dz-firsttimer-link:hover {
  border-bottom-color: var(--dz-gold);
}

.dz-firsttimer-dismiss {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--dz-muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.dz-firsttimer-dismiss:hover {
  background: rgba(13, 59, 110, 0.10);
  color: var(--dz-ocean);
}

.dz-firsttimer-dismiss:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

/* -------------------------------------------------------------------------
   Wing entry cards grid
   ------------------------------------------------------------------------- */
.dz-wing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.dz-wing-card {
  display: flex;
  flex-direction: column;
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-top: 4px solid var(--dz-gold);
  border-radius: var(--dz-radius);
  padding: 22px 22px 18px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--dz-shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.dz-wing-card:hover,
.dz-wing-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--dz-shadow-md);
  border-top-color: var(--dz-forest);
  outline: none;
}

.dz-wing-card:focus-visible {
  box-shadow: 0 0 0 3px var(--dz-gold), var(--dz-shadow-md);
}

.dz-wing-card-icon {
  font-size: 1.7rem;
  line-height: 1;
  margin-bottom: 10px;
}

.dz-wing-card-title {
  font-family: var(--serif, Georgia, serif);
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--dz-ocean);
  margin: 0 0 8px;
}

.dz-wing-card-desc {
  font-size: 0.95rem;
  color: var(--dz-muted);
  line-height: 1.5;
  margin: 0 0 16px;
  flex: 1 1 auto;
}

.dz-wing-card-cta {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--dz-forest);
  align-self: flex-start;
  transition: transform 0.18s ease;
}

.dz-wing-card:hover .dz-wing-card-cta {
  transform: translateX(4px);
}

/* -------------------------------------------------------------------------
   Simulation Lab wing header (inside restyled wing)
   ------------------------------------------------------------------------- */
.dz-wing-header {
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-left: 5px solid var(--dz-ocean);
  border-radius: var(--dz-radius);
  padding: 20px 24px;
  margin: 0 0 28px;
  box-shadow: var(--dz-shadow-sm);
}

.dz-wing-header .eyebrow {
  color: var(--dz-forest);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.72rem;
  margin: 0 0 4px;
}

.dz-wing-header h2 {
  color: var(--dz-ocean);
  margin: 0 0 6px;
  font-size: 1.5rem;
}

.dz-wing-header p {
  color: var(--dz-muted);
  margin: 0;
  max-width: 760px;
}

/* -------------------------------------------------------------------------
   Persistent tri-guna legend (bottom-right floating, collapsible)
   ------------------------------------------------------------------------- */
.dz-legend {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1200;
  font-family: var(--sans, "Source Sans 3", sans-serif);
}

/* Always-visible display-mode toggle (bottom-left, mirrors the legend) */
.dz-display-toggle-float {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 1100;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: #fff;
  border: 2px solid var(--ocean, #0D3B6E);
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(13, 59, 110, 0.18);
  font-family: var(--sans, "Source Sans 3", sans-serif);
}
.dz-display-toggle-float-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ocean, #0D3B6E);
  padding-left: 4px;
}
.dz-display-toggle-float .display-mode-toggle {
  margin: 0;
}
.dz-display-toggle-float .display-mode-btn {
  min-height: 32px;
}

@media (max-width: 768px) {
  .dz-display-toggle-float {
    left: 12px;
    bottom: 12px;
    padding: 4px 8px;
    gap: 4px;
  }
  .dz-display-toggle-float-label {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dz-display-toggle-float,
  .dz-display-toggle-float * {
    transition: none !important;
  }
}

.dz-legend-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--dz-ocean);
  color: #fff;
  border: none;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: var(--dz-shadow-md);
  transition: background 0.18s ease, transform 0.18s ease;
}

.dz-legend-toggle:hover {
  background: var(--dz-ocean-dk);
}

.dz-legend-toggle:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

.dz-legend-toggle-icon {
  font-size: 1.05rem;
  line-height: 1;
}

.dz-legend-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  width: 288px;
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-radius: var(--dz-radius);
  box-shadow: var(--dz-shadow-lg);
  padding: 16px 18px;
  transform-origin: bottom right;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.dz-legend-panel[hidden] {
  display: none;
}

.dz-legend.is-collapsed .dz-legend-panel {
  display: none;
}

.dz-legend-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.dz-legend-title {
  font-family: var(--serif, Georgia, serif);
  font-weight: 700;
  color: var(--dz-ocean);
  font-size: 1.02rem;
  margin: 0;
}

.dz-legend-close {
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--dz-muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
}

.dz-legend-close:hover {
  background: rgba(13, 59, 110, 0.1);
  color: var(--dz-ocean);
}

.dz-legend-close:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

.dz-legend-group-label {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dz-muted);
  font-weight: 700;
  margin: 10px 0 6px;
}

.dz-legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--dz-ink);
}

.dz-legend-swatch {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.78rem;
}

.dz-legend-swatch.coherent { background: var(--dz-guna-coherent); }
.dz-legend-swatch.resonant { background: var(--dz-guna-resonant); }
.dz-legend-swatch.expansive { background: var(--dz-guna-expansive); }

.dz-legend-glyph {
  flex-shrink: 0;
  width: 44px;
  font-family: var(--serif, Georgia, serif);
  font-weight: 700;
  color: var(--dz-ocean);
  text-align: center;
  font-size: 1rem;
}

.dz-legend-divider {
  border: none;
  border-top: 1px solid var(--dz-line);
  margin: 12px 0 2px;
}

/* -------------------------------------------------------------------------
   About slide-over panel
   ------------------------------------------------------------------------- */
.dz-about-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 45, 84, 0.42);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s ease, visibility 0.24s ease;
  z-index: 1300;
}

.dz-about-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.dz-about-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(480px, 92vw);
  background: var(--dz-white);
  box-shadow: var(--dz-shadow-lg);
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 1310;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.dz-about-panel.is-open {
  transform: translateX(0);
}

.dz-about-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px;
  background: var(--dz-ocean);
  color: #fff;
}

.dz-about-header h2 {
  margin: 0;
  font-size: 1.28rem;
  color: #fff;
}

.dz-about-close {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.18s ease;
}

.dz-about-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.dz-about-close:focus-visible {
  outline: 3px solid var(--dz-gold);
  outline-offset: 2px;
}

.dz-about-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 24px 26px 32px;
}

.dz-about-body h3 {
  color: var(--dz-ocean);
  font-size: 1.1rem;
  margin: 22px 0 8px;
}

.dz-about-body h3:first-child {
  margin-top: 0;
}

.dz-about-body p {
  color: var(--dz-ink);
  line-height: 1.6;
  margin: 0 0 12px;
}

.dz-about-tagline {
  font-family: var(--serif, Georgia, serif);
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--dz-forest);
  font-style: italic;
}

.dz-about-body a {
  color: var(--dz-ocean);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--dz-gold);
}

.dz-about-body a:hover {
  color: var(--dz-forest);
}

.dz-about-body ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

.dz-about-body li {
  color: var(--dz-ink);
  line-height: 1.55;
  margin-bottom: 6px;
}

.dz-about-authenticity {
  background: var(--dz-bg-soft);
  border-left: 4px solid var(--dz-gold);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 8px 0 12px;
}

.dz-about-authenticity p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--dz-ink);
}

.dz-about-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--dz-forest);
  color: #fff !important;
  font-weight: 700;
  text-decoration: none !important;
  transition: background 0.18s ease;
}

.dz-about-cta:hover {
  background: #24523d;
}

.dz-about-versions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--dz-line);
}

.dz-about-version-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--dz-bg-soft);
  border: 1px solid var(--dz-line);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--dz-ocean);
}

.dz-about-version-chip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dz-forest);
}

/* -------------------------------------------------------------------------
   Responsive — tablet (<= 900px)
   ------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .dz-wing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* -------------------------------------------------------------------------
   Responsive — tablet / small (<= 768px)
   ------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .dz-hub {
    padding: 28px 0 34px;
  }
  .dz-toolbar {
    gap: 10px;
  }
  .dz-search {
    flex: 1 1 100%;
    max-width: none;
    order: -1;
  }
  .dz-toolbar-actions {
    flex-wrap: wrap;
  }
}

/* -------------------------------------------------------------------------
   Responsive — mobile (<= 560px / 390px target)
   ------------------------------------------------------------------------- */
@media (max-width: 560px) {
  .dz-wing-grid {
    grid-template-columns: 1fr;
  }
  .dz-hub .wrap {
    padding: 0 16px;
  }
  .dz-firsttimer {
    align-items: flex-start;
  }
  .dz-about-btn span.dz-about-btn-label {
    display: none;
  }
  /* On mobile the legend is a compact button that opens the panel full-width */
  .dz-legend {
    right: 12px;
    bottom: 12px;
  }
  .dz-legend-panel {
    width: min(300px, calc(100vw - 24px));
  }
}

/* -------------------------------------------------------------------------
   Reduced motion
   ------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .dz-wing-card,
  .dz-about-panel,
  .dz-about-overlay,
  .dz-legend-panel,
  .dz-legend-toggle,
  .dz-settings-btn,
  .dz-about-btn,
  .dz-wing-card-cta {
    transition: none !important;
  }
}



/* =========================================================================
   NEW ZONES (2026-07-23 restructure)
   Coming-soon badges, Ladder of Phenomena teaser, and Siddhi zone.
   ========================================================================= */

/* --- "Coming soon" badge on a hub wing card --- */
.dz-wing-card {
  position: relative;
}
.dz-wing-card-badge {
  position: absolute;
  top: -10px;
  right: 14px;
  background: var(--dz-gold);
  color: #fff;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: var(--dz-shadow-sm);
}

/* --- Inline "Coming soon" pill next to an eyebrow/heading --- */
.dz-soon-pill {
  display: inline-block;
  vertical-align: middle;
  margin-left: 8px;
  background: rgba(200, 150, 62, 0.14);
  color: var(--dz-gold-dk);
  border: 1px solid rgba(200, 150, 62, 0.4);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
}

/* =========================================================================
   LADDER OF PHENOMENA — coming-soon panel
   ========================================================================= */
.lop-coming-soon {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--dz-bg-soft) 100%);
  border: 1px solid var(--dz-line);
  border-top: 4px solid var(--dz-gold);
  border-radius: var(--dz-radius);
  box-shadow: var(--dz-shadow-sm);
  padding: 40px 32px 34px;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}
.lop-coming-soon-glyph {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 14px;
}
.lop-coming-soon-lede {
  font-size: 1.12rem;
  line-height: 1.65;
  color: var(--dz-ink);
  max-width: 640px;
  margin: 0 auto 26px;
}
.lop-rungs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 460px;
  margin: 0 auto 26px;
}
.lop-rung {
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-left: 4px solid var(--dz-ocean);
  border-radius: 8px;
  padding: 9px 16px;
  font-weight: 600;
  color: var(--dz-ocean);
  font-size: 0.95rem;
  box-shadow: var(--dz-shadow-sm);
}
/* progressive tint down the ladder: cosmos (ocean) → substratum (gold) */
.lop-rung:nth-child(1) { border-left-color: var(--dz-ocean); }
.lop-rung:nth-child(2) { border-left-color: #1E5A8A; }
.lop-rung:nth-child(3) { border-left-color: #2B7A6B; }
.lop-rung:nth-child(4) { border-left-color: var(--dz-forest); }
.lop-rung:nth-child(5) { border-left-color: #6E8C46; }
.lop-rung:nth-child(6) { border-left-color: #A9822F; }
.lop-rung:nth-child(7) { border-left-color: var(--dz-gold); color: var(--dz-gold-dk); }
.lop-coming-soon-note {
  font-size: 0.95rem;
  color: var(--dz-muted);
  line-height: 1.6;
  max-width: 620px;
  margin: 0 auto;
}
.lop-coming-soon-note code {
  background: var(--dz-bg-soft);
  border: 1px solid var(--dz-line);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.88em;
  color: var(--dz-ocean);
}
.lop-coming-soon-note a {
  color: var(--dz-forest);
  font-weight: 700;
}
.lop-coming-soon-cite {
  font-size: 0.82rem;
  color: var(--dz-muted);
  line-height: 1.5;
  max-width: 620px;
  margin: 0.9rem auto 0;
  opacity: 0.85;
}

/* =========================================================================
   SIDDHI ZONE
   ========================================================================= */
.siddhi-zone .dz-wing-header {
  border-left-color: var(--dz-forest);
}

/* Concept cards grid */
.siddhi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 0 0 26px;
}
.siddhi-card {
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-top: 4px solid var(--dz-forest);
  border-radius: var(--dz-radius);
  padding: 22px 22px 18px;
  box-shadow: var(--dz-shadow-sm);
}
.siddhi-card h3 {
  font-family: var(--serif, Georgia, serif);
  color: var(--dz-ocean);
  margin: 0 0 10px;
  font-size: 1.16rem;
}
.siddhi-card p {
  margin: 0;
  color: var(--dz-ink);
  line-height: 1.6;
  font-size: 0.97rem;
}
.siddhi-principles {
  margin: 0;
  padding-left: 20px;
  color: var(--dz-ink);
  line-height: 1.6;
  font-size: 0.97rem;
}
.siddhi-principles li { margin-bottom: 8px; }
.siddhi-principles li:last-child { margin-bottom: 0; }

/* How-to block */
.siddhi-howto,
.siddhi-evidence,
.siddhi-why {
  background: var(--dz-white);
  border: 1px solid var(--dz-line);
  border-radius: var(--dz-radius);
  box-shadow: var(--dz-shadow-sm);
  padding: 26px 26px 22px;
  margin: 0 0 26px;
}
.siddhi-howto h3,
.siddhi-evidence h3,
.siddhi-why h3 {
  font-family: var(--serif, Georgia, serif);
  color: var(--dz-ocean);
  margin: 0 0 16px;
  font-size: 1.3rem;
}
.siddhi-howto-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 22px;
  align-items: start;
}
.siddhi-steps {
  margin: 0;
  padding-left: 22px;
  color: var(--dz-ink);
  line-height: 1.6;
}
.siddhi-steps li { margin-bottom: 12px; }
.siddhi-steps li:last-child { margin-bottom: 0; }

/* Evidence: brainwave rungs */
.siddhi-evidence > p { color: var(--dz-ink); line-height: 1.6; margin: 0 0 16px; }
.siddhi-waves {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 0 0 20px;
}
.siddhi-wave {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--dz-bg-soft);
  border: 1px solid var(--dz-line);
  border-top: 3px solid var(--dz-ocean);
  border-radius: 10px;
  padding: 14px 14px 12px;
}
.siddhi-wave:nth-child(1) { border-top-color: #C0392B; }
.siddhi-wave:nth-child(2) { border-top-color: var(--dz-gold); }
.siddhi-wave:nth-child(3) { border-top-color: var(--dz-forest); }
.siddhi-wave:nth-child(4) { border-top-color: var(--dz-ocean); }
.siddhi-wave-name {
  font-weight: 700;
  color: var(--dz-ocean);
  font-size: 0.98rem;
}
.siddhi-wave-desc {
  font-size: 0.85rem;
  color: var(--dz-muted);
  line-height: 1.45;
}

/* Evidence: measurable facts */
.siddhi-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.siddhi-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--dz-bg-soft) 100%);
  border: 1px solid var(--dz-line);
  border-left: 4px solid var(--dz-forest);
  border-radius: 10px;
  padding: 16px 18px;
}
.siddhi-fact-num {
  font-family: var(--serif, Georgia, serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dz-forest);
  line-height: 1;
}
.siddhi-fact-label {
  font-size: 0.88rem;
  color: var(--dz-muted);
  line-height: 1.5;
}

/* Source line */
.siddhi-source {
  font-size: 0.86rem;
  color: var(--dz-muted);
  font-style: italic;
  margin: 16px 0 0;
}

/* Siddhi responsive */
@media (max-width: 768px) {
  .siddhi-grid { grid-template-columns: 1fr; }
  .siddhi-howto-inner { grid-template-columns: 1fr; }
  .siddhi-waves { grid-template-columns: repeat(2, 1fr); }
  .siddhi-facts { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .siddhi-waves { grid-template-columns: 1fr; }
  .lop-coming-soon { padding: 30px 20px 26px; }
}

/* ============================================================
   Back-to-top navigation (Round 3)
   - .dz-backtotop-float : always-available floating button (bottom-right)
   - .dz-wing-backtotop  : per-zone link at the end of each working window
   ============================================================ */
.dz-backtotop-float {
  position: fixed;
  right: 20px;
  bottom: 76px; /* stacked above the Legend button (which sits at bottom:20) */
  z-index: 1150;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--ocean, #0D3B6E);
  color: #fff;
  border: 2px solid #fff;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(13, 59, 110, 0.28);
  font-family: var(--sans, "Source Sans 3", sans-serif);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}
.dz-backtotop-float:hover {
  background: var(--forest, #2D6A4F);
  transform: translateY(-2px);
}
.dz-backtotop-float:focus-visible {
  outline: 3px solid var(--gold, #C8963E);
  outline-offset: 2px;
}
.dz-backtotop-float[hidden] { display: none; }
.dz-backtotop-float-arrow { font-size: 1rem; line-height: 1; }

.dz-wing-backtotop {
  margin: 28px 0 0;
  text-align: center;
}
.dz-wing-backtotop a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 2px solid var(--ocean, #0D3B6E);
  border-radius: 999px;
  color: var(--ocean, #0D3B6E);
  background: #fff;
  font-family: var(--sans, "Source Sans 3", sans-serif);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 160ms ease, color 160ms ease;
}
.dz-wing-backtotop a:hover {
  background: var(--ocean, #0D3B6E);
  color: #fff;
}
.dz-wing-backtotop a:focus-visible {
  outline: 3px solid var(--gold, #C8963E);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .dz-backtotop-float { right: 12px; bottom: 64px; padding: 6px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .dz-backtotop-float { transition: none !important; }
  .dz-backtotop-float:hover { transform: none; }
}