/* ── Krytz · Site features (dark mode, sounds, TOC, etc.) ────────────────── */

/* ══════════════════════════════════════════════════════════════════
   DARK MODE — design tokens
   ══════════════════════════════════════════════════════════════════ */
html[data-theme="dark"] {
  --bg:         #0E0F13;
  --bg-2:       #15161C;
  --bg-3:       #1D1E26;
  --surface:    #1A1B23;
  --surface-2:  #21222B;

  --ink:        #F4F2EC;
  --ink-2:      #B8B6BC;
  --ink-3:      #8A8893;
  --ink-4:      #5A5862;

  --line:       rgba(255,255,255,0.07);
  --line-2:     rgba(255,255,255,0.13);
  --line-3:     rgba(255,255,255,0.22);

  --g:          #C8A45A;
  --g-deep:     #1B2A4A;
  --g-mid:      #a99af0;
  --g-soft:     rgba(27, 42, 74,0.18);
  --g-soft-2:   rgba(27, 42, 74,0.10);
  --g-glow:     rgba(200, 164, 90,0.22);

  --action-soft:   rgba(216,73,58,0.18);
  --waiting-soft:  rgba(229,139,42,0.16);
  --done-soft:     rgba(45,136,89,0.18);
  --info-soft:     rgba(74,143,191,0.18);
  --memory-soft:   rgba(110,91,212,0.18);

  --sh-1: 0 1px 2px rgba(0,0,0,0.4);
  --sh-2: 0 4px 18px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.4);
  --sh-3: 0 16px 40px rgba(0,0,0,0.6), 0 2px 6px rgba(0,0,0,0.4);
  --sh-4: 0 28px 70px rgba(0,0,0,0.7), 0 6px 14px rgba(0,0,0,0.4);
}

/* Smooth crossfade on theme switch */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition:
    background-color 360ms ease,
    color 360ms ease,
    border-color 360ms ease,
    fill 360ms ease,
    stroke 360ms ease,
    box-shadow 360ms ease !important;
}

/* Dark mode tweaks for nav scrim */
html[data-theme="dark"] .nav {
  background: rgba(14,15,19,0.78);
}

/* Phone frame goes lighter in dark mode for contrast */
html[data-theme="dark"] .phone {
  background: #2A2B33;
  box-shadow:
    0 32px 80px rgba(0,0,0,0.6),
    0 8px 20px rgba(0,0,0,0.4),
    inset 0 0 0 1.5px #3A3B45;
}
html[data-theme="dark"] .phone::before { background: #2A2B33; }

/* ══════════════════════════════════════════════════════════════════
   SETTINGS PANEL (nav menu)
   ══════════════════════════════════════════════════════════════════ */
.sf-settings {
  position: relative;
}
.sf-gear {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 8px;
  color: var(--ink-2);
  cursor: pointer;
  transition: color 120ms, background 120ms;
  background: transparent;
  border: 0;
}
.sf-gear:hover { color: var(--ink); background: var(--bg-3); }
.sf-gear svg { width: 18px; height: 18px; }

.sf-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 260px;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  box-shadow: var(--sh-3);
  padding: 6px;
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition: opacity 180ms ease-out, transform 180ms ease-out;
  z-index: 100;
}
.sf-panel.is-open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.sf-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
}
.sf-row + .sf-row { border-top: 1px solid var(--line); }
.sf-row .sf-lbl { font-size: 13px; color: var(--ink); font-weight: 500; }
.sf-row .sf-sub {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
}

.sf-seg {
  display: inline-flex;
  background: var(--bg-3);
  padding: 2px;
  border-radius: 6px;
}
.sf-seg button {
  padding: 5px 10px;
  font-size: 11px;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: transparent;
  border: 0;
  border-radius: 5px;
  cursor: pointer;
  transition: all 120ms;
}
.sf-seg button.is-on {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.sf-toggle {
  position: relative;
  width: 36px; height: 20px;
  background: var(--bg-3);
  border-radius: 999px;
  cursor: pointer;
  transition: background 180ms;
  border: 0;
}
.sf-toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 200ms cubic-bezier(0.2, 0.7, 0.3, 1.1);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.sf-toggle.is-on { background: var(--g); }
.sf-toggle.is-on::after { transform: translateX(16px); }

.sf-section-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 12px 12px 6px;
}

/* ══════════════════════════════════════════════════════════════════
   READING PROGRESS BAR
   ══════════════════════════════════════════════════════════════════ */
.sf-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  z-index: 60;
  pointer-events: none;
}
.sf-progress > i {
  display: block;
  height: 100%;
  background: var(--g);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 80ms linear;
}

.sf-readtime {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 6px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.sf-readtime svg { width: 12px; height: 12px; }

/* ══════════════════════════════════════════════════════════════════
   FLOATING TOC
   ══════════════════════════════════════════════════════════════════ */
.sf-toc {
  position: fixed;
  top: 50%;
  right: 24px;
  transform: translateY(-50%);
  width: 220px;
  z-index: 40;
  font-family: var(--font);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  padding: 14px 6px;
  box-shadow: var(--sh-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 280ms ease-out;
}
.sf-toc.is-visible {
  opacity: 1;
  pointer-events: auto;
}
.sf-toc-label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0 12px 8px;
}
.sf-toc-list { list-style: none; margin: 0; padding: 0; }
.sf-toc-item {
  display: block;
  position: relative;
  padding: 6px 12px 6px 22px;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: -0.005em;
  line-height: 1.4;
  cursor: pointer;
  transition: color 160ms;
  text-decoration: none;
}
.sf-toc-item::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--ink-4);
  transition: background 180ms, transform 180ms;
}
.sf-toc-item.depth-3 { padding-left: 32px; font-size: 11.5px; }
.sf-toc-item.depth-3::before { left: 22px; }
.sf-toc-item:hover { color: var(--ink); }
.sf-toc-item.is-active {
  color: var(--g);
  font-weight: 500;
}
.sf-toc-item.is-active::before {
  background: var(--g);
  transform: translateY(-50%) scale(1.6);
  box-shadow: 0 0 0 3px var(--g-soft);
}
.sf-toc-progress {
  position: absolute;
  left: 14px;
  top: 32px;
  bottom: 14px;
  width: 1px;
  background: var(--line-2);
  z-index: -1;
}
.sf-toc-progress > i {
  display: block;
  width: 100%;
  background: var(--g);
  transform-origin: top;
  transform: scaleY(0);
  transition: transform 120ms linear;
}

@media (max-width: 1280px) {
  .sf-toc { display: none; }
}

/* ══════════════════════════════════════════════════════════════════
   EASTER EGG · toast
   ══════════════════════════════════════════════════════════════════ */
.sf-toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translate(-50%, 32px);
  background: var(--ink);
  color: #fff;
  border-radius: 12px;
  padding: 14px 22px;
  display: flex; align-items: center; gap: 12px;
  box-shadow: var(--sh-4);
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease-out, transform 320ms cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
.sf-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}
.sf-toast .glyph {
  width: 28px; height: 28px;
  background: var(--g);
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 14px;
  flex-shrink: 0;
  animation: sf-toast-spin 1.8s ease-in-out infinite;
}
@keyframes sf-toast-spin {
  0%, 100% { transform: rotate(0deg); }
  50%      { transform: rotate(180deg); }
}
.sf-toast .body { line-height: 1.4; }
.sf-toast .sub { font-family: var(--mono); font-size: 11px; color: rgba(255,255,255,0.6); margin-top: 3px; letter-spacing: 0.04em; }

/* ══════════════════════════════════════════════════════════════════
   SKELETON SCREENS
   ══════════════════════════════════════════════════════════════════ */
.skel {
  background: linear-gradient(
    90deg,
    var(--bg-3) 0%,
    var(--bg-2) 50%,
    var(--bg-3) 100%
  );
  background-size: 200% 100%;
  animation: skel-shimmer 1.6s linear infinite;
  border-radius: var(--r-1);
  position: relative;
  overflow: hidden;
  color: transparent !important;
  user-select: none;
}
@keyframes skel-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skel-text { height: 1em; display: inline-block; min-width: 4em; vertical-align: middle; }
.skel-block { display: block; height: 120px; width: 100%; }

img.skel { color: transparent; }
img.skel-loaded {
  animation: skel-fadein 280ms ease-out;
}
@keyframes skel-fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ══════════════════════════════════════════════════════════════════
   PRINT STYLES
   ══════════════════════════════════════════════════════════════════ */
@media print {
  /* Reset to clean light theme for print */
  html, html[data-theme="dark"] {
    --bg: #ffffff;
    --bg-2: #ffffff;
    --bg-3: #f5f5f5;
    --surface: #ffffff;
    --ink: #000000;
    --ink-2: #333333;
    --ink-3: #666666;
    --line: rgba(0,0,0,0.1);
    --line-2: rgba(0,0,0,0.2);
    --g: #2C3E6B;
  }

  body {
    background: #ffffff !important;
    color: #000 !important;
    font-size: 11pt;
    line-height: 1.45;
  }

  /* Hide UI chrome */
  .nav, .sf-toc, .sf-progress, .sf-toast,
  .nav-cta, .end-cta-actions, .sf-settings,
  [data-scroll-progress], .demo-instructions,
  iframe, video, audio,
  .mq-section, .ep-fly-layer,
  .ssn-sticky, .pr-grid, .fg-wrap, .pc-wrap,
  .cx-grid, .tl-wrap, [id$="-mount"],
  .ss-section,
  [data-marquee], [data-parallax-scene],
  .nt-strip {
    display: none !important;
  }

  a {
    color: inherit;
    text-decoration: none;
  }
  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #888;
    word-break: break-all;
  }
  a[href^="#"]:after, a[href^="mailto:"]:after { content: ""; }

  section, .wrap, .card {
    page-break-inside: avoid;
    box-shadow: none !important;
    border: 0 !important;
    background: transparent !important;
    padding: 12pt 0 !important;
    margin: 0 !important;
  }
  h1, h2, h3, h4 { page-break-after: avoid; color: #000 !important; }
  h1 { font-size: 24pt; margin-bottom: 8pt; }
  h2 { font-size: 16pt; margin-top: 16pt; margin-bottom: 6pt; }
  h3 { font-size: 13pt; margin-top: 12pt; margin-bottom: 4pt; }
  .eyebrow { color: #2C3E6B !important; }

  /* Pricing tier cards print as a simple block layout */
  .pricing-tiers, .price-grid {
    display: block !important;
  }
  .tier, .price-card {
    page-break-inside: avoid;
    border: 1pt solid #ccc !important;
    border-radius: 6pt;
    padding: 12pt !important;
    margin-bottom: 12pt !important;
  }

  /* Footer collapses to single line */
  footer { border-top: 1pt solid #999 !important; padding: 12pt 0 !important; }
  .foot { grid-template-columns: 1fr !important; }
  .foot-col { display: none !important; }
  .foot-meta { font-size: 9pt; }
}