/* --- Variables --- */
:root {
  --kb-green:        #20392E;
  --kb-green-mid:    #007A55;
  --kb-green-light:  #006045;
  --kb-accent:       #00D492;
  --kb-gold:         #C9A84C;
  --kb-white:        #FFFFFF;
  --kb-off-white:    #F5F5F0;
  --kb-text:         #1A1A1A;
  --kb-muted:        #6B7280;
  --kb-border:       #F5F5F5;
  --kb-dgrey:#171717;
--kb-lgrey:#A1A1A1;
  --kb-grey: #737373;
--kb-btn: #525252;
}


/* ── Overlay ─────────────────────────────────────────────────────────────── */
.kb-reader-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: #111;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.kb-reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: #1a1a1a;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  flex-shrink: 0;
  gap: 12px;
  min-height: 52px;
}

.kb-reader-header__left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
width: 50%;
    justify-content: space-between;
}

.kb-reader-header__right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.kb-reader-close {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  padding: 0;
  white-space: nowrap;
  transition: color 0.15s;
  font-weight: 500;
}
.kb-reader-close:hover { color: #fff; }
.kb-reader-close svg  { width: 15px; height: 15px; flex-shrink: 0; }

.kb-reader-issue-title {
font-size: 18px;
    /* font-weight: 600; */
    color: #fff;
    letter-spacing: 0.04em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
    font-family: 'b-bold';
}

/* ── Header icon buttons ─────────────────────────────────────────────────── */
.kb-reader-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 4px;
  cursor: pointer;
  color: rgba(255,255,255,0.65);
  transition: all 0.15s;
  flex-shrink: 0;
	padding: 0;
}
.kb-reader-btn:hover   { background: rgba(255,255,255,0.13); color: #fff; }
.kb-reader-btn:disabled { opacity: 0.25; cursor: not-allowed; }
.kb-reader-btn svg     { width: 17px; height: 17px; }

.kb-reader-page-counter {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.kb-reader-page-counter span {
  color: #fff;
  font-weight: 600;
}

/* ── Main reading area ───────────────────────────────────────────────────── */
.kb-reader-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 16px 56px;
}

/* ── Spread ──────────────────────────────────────────────────────────────── */
#kb-reader-spread {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  position: relative;
  max-height: 100%;

  /* Page turn effect — smooth opacity fade between pages */
  transition: opacity 0.25s ease;
}


/* ── Page-turn animation ─────────────────────────────────────────────────── */

/* Going forward — right page peels left */
@keyframes kb-flip-next-left {
  0%   { transform: rotateY(0deg);     opacity: 1; }
  50%  { transform: rotateY(-90deg);   opacity: 0.4; }
  100% { transform: rotateY(0deg);     opacity: 1; }
}

/* Going forward — left page slides in from right */
@keyframes kb-flip-next-right {
  0%   { transform: translateX(18px);  opacity: 0.5; }
  100% { transform: translateX(0);     opacity: 1; }
}

/* Going backward — left page peels right */
@keyframes kb-flip-prev-right {
  0%   { transform: rotateY(0deg);     opacity: 1; }
  50%  { transform: rotateY(90deg);    opacity: 0.4; }
  100% { transform: rotateY(0deg);     opacity: 1; }
}

/* Going backward — right page slides in from left */
@keyframes kb-flip-prev-left {
  0%   { transform: translateX(-18px); opacity: 0.5; }
  100% { transform: translateX(0);     opacity: 1; }
}

/* Apply when JS adds the class */
#kb-reader-spread.kb-flip-next #kb-canvas-right {
  animation: kb-flip-next-left 0.35s ease-in-out;
  transform-origin: left center;
}
#kb-reader-spread.kb-flip-next #kb-canvas-left {
  animation: kb-flip-next-right 0.35s ease-out;
}

#kb-reader-spread.kb-flip-prev #kb-canvas-left {
  animation: kb-flip-prev-right 0.35s ease-in-out;
  transform-origin: right center;
}
#kb-reader-spread.kb-flip-prev #kb-canvas-right {
  animation: kb-flip-prev-left 0.35s ease-out;
}

/* perspective needed for the rotateY to look 3D */
#kb-reader-spread {
  perspective: 1200px;
}

/* ── Page canvases ───────────────────────────────────────────────────────── */
#kb-canvas-left,
#kb-canvas-right {
  display: block;
  max-height: 100%;
  cursor: pointer;
  user-select: none;
  -webkit-user-drag: none;

  /* Subtle drop shadow to give each page depth */
  filter: drop-shadow(0 4px 24px rgba(0,0,0,0.7));

  /* Page turn: each canvas slides + fades when changing */
  transition: opacity 0.25s ease, transform 0.25s ease;
}

#kb-canvas-left {
  transform-origin: right center;
  border-radius: 2px 0 0 2px;
}

#kb-canvas-right {
  transform-origin: left center;
  border-radius: 0 2px 2px 0;
}

/* While rendering: slight scale-down simulates page lifting */
#kb-reader-spread[style*="opacity: 0.3"] #kb-canvas-left,
#kb-reader-spread[style*="opacity: 0.3"] #kb-canvas-right {
  transform: scale(0.97);
}

/* Restore on render complete */
#kb-reader-spread #kb-canvas-left,
#kb-reader-spread #kb-canvas-right {
  transform: scale(1);
}

/* Gutter / spine shadow between pages */
#kb-reader-spread::after {
  content: '';
  position: absolute;
  top: 4%;
  bottom: 4%;
  left: 50%;
  width: 3px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom,
    transparent,
    rgba(0,0,0,0.55) 25%,
    rgba(0,0,0,0.75) 50%,
    rgba(0,0,0,0.55) 75%,
    transparent
  );
  pointer-events: none;
  z-index: 1;
}

/* Hide spine when right page is hidden (single-page mode) */
#kb-canvas-right[style*="display: none"] {
  /* handled by JS setting display:none */
}

/* Click affordance: subtle brighten on hover */
#kb-canvas-left:hover  { filter: drop-shadow(0 4px 24px rgba(0,0,0,0.7)) brightness(1.04); }
#kb-canvas-right:hover { filter: drop-shadow(0 4px 24px rgba(0,0,0,0.7)) brightness(1.04); }

/* ── Prev/Next arrows ────────────────────────────────────────────────────── */
.kb-reader-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: 50%;
  cursor: pointer;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
	padding: 0;
}
.kb-reader-arrow:hover   { background: rgba(255,255,255,0.17); color: #fff; }
.kb-reader-arrow:disabled { opacity: 0.18; cursor: not-allowed; }
.kb-reader-arrow svg     { width: 19px; height: 19px; }

#kb-reader-prev { left: 10px; }
#kb-reader-next { right: 10px; }

/* ── Loader ──────────────────────────────────────────────────────────────── */
.kb-reader-loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(17,17,17,0.88);
  z-index: 20;
  gap: 14px;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  letter-spacing: 0.04em;
  pointer-events: none;
}

.kb-reader-loader__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255,255,255,0.07);
  border-top-color: #00D492;
  border-radius: 50%;
  animation: kb-spin 0.7s linear infinite;
}
@keyframes kb-spin { to { transform: rotate(360deg); } }

/* ── Thumbnail strip ─────────────────────────────────────────────────────── */
.kb-reader-thumb-strip {
  flex-shrink: 0;
  background: #161616;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 8px 12px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  align-items: flex-end;
  height: 88px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
}
.kb-reader-thumb-strip::-webkit-scrollbar      { height: 3px; }
.kb-reader-thumb-strip::-webkit-scrollbar-track { background: transparent; }
.kb-reader-thumb-strip::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
}

/* ── Individual thumb ────────────────────────────────────────────────────── */
.kb-thumb {
  flex-shrink: 0;
  background: rgba(255,255,255,0.04);
  border: 2px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  padding: 0 0 3px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 3px;
  min-width: 42px;
  height: 66px;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}
.kb-thumb:hover  { border-color: rgba(255,255,255,0.3); transform: translateY(-2px); }
.kb-thumb.active { border-color: #00D492; }

.kb-thumb canvas {
  display: block;
  width: auto;
  height: 50px;
  opacity: 0.6;
  transition: opacity 0.15s;
  border-radius: 1px;
}
.kb-thumb:hover canvas,
.kb-thumb.active canvas { opacity: 1; }

.kb-thumb__num {
  font-size: 9px;
  color: rgba(255,255,255,0.3);
  line-height: 1;
}
.kb-thumb.active .kb-thumb__num { color: #00D492; }

/* ── Fullscreen ──────────────────────────────────────────────────────────── */
:-webkit-full-screen .kb-reader-overlay { position: fixed; }
:-moz-full-screen    .kb-reader-overlay { position: fixed; }
:fullscreen          .kb-reader-overlay { position: fixed; }

/* ── Mobile ──────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .kb-reader-issue-title { display: none; }
  .kb-reader-main        { padding: 10px 46px; }
  #kb-reader-prev        { left: 4px; }
  #kb-reader-next        { right: 4px; }
  #kb-reader-spread::after { display: none; }
  .kb-reader-thumb-strip { height: 70px; }
  .kb-thumb              { height: 52px; min-width: 36px; }
  .kb-thumb canvas       { height: 38px; }
}


/* ── Completion screen ───────────────────────────────────────────────────── */
#kb-completion-screen {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(6px);
  animation: kb-fade-in 0.4s ease;
}

@keyframes kb-fade-in {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

#kb-confetti-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.kb-completion__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  padding: 40px 32px;
  max-width: 420px;
}

.kb-completion__check svg {
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 0 20px rgba(0,212,146,0.5));
  animation: kb-pop 0.5s cubic-bezier(0.175,0.885,0.32,1.275) 0.2s both;
}

@keyframes kb-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.kb-completion__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,212,146,0.15);
  border: 1px solid rgba(0,212,146,0.4);
  color: #00D492;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 20px;
}

.kb-completion__title {
  color: #fff;
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  line-height: 1.2;
}

.kb-completion__sub {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  margin: 0;
}

.kb-completion__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

.kb-completion__btn {
  padding: 11px 24px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.kb-completion__btn--primary {
  background: #00D492;
  color: #111;
}
.kb-completion__btn--primary:hover { background: #00e8a0; }

.kb-completion__btn--ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
}
.kb-completion__btn--ghost:hover { border-color: rgba(255,255,255,0.5); color: #fff; }

/* ── Completed badge on dashboard card ───────────────────────────────────── */
.kb-completed-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #006045;
    font-size: 12px;
    font-family: bold;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 10px 0 0;
    border-radius: 5px;
}

.kb-completed-badge svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}


/* ── Zoom / Drag ─────────────────────────────────────────────────────────── */
.kb-reader-main.is-zoomed {
    overflow: scroll;
    cursor: grab;
    scrollbar-width: none;
}
.kb-reader-main.is-zoomed::-webkit-scrollbar { display: none; }
.kb-reader-main.is-zoomed.is-dragging { cursor: grabbing; }

/* Disable pointer events on canvases while zoomed so drag doesn't trigger page turn */
.kb-reader-main.is-zoomed #kb-canvas-left,
.kb-reader-main.is-zoomed #kb-canvas-right {
    cursor: inherit;
    pointer-events: none;
}