/* ============================================================
   Faiza Khan Portfolio — notebook.css
   Notebook chrome: Spine · Rings · Tabs · Stickies · Tape
   Polaroid · Torn paper · Botanical · Arrows
   ============================================================ */


/* ============================================================
   LEFT SPINE — hardbound book style
   ============================================================ */

.spine {
  width: var(--spine-w);
  min-height: 100vh;
  background: var(--spine);
  /* Fine linen/fabric texture — very subtle vertical weave lines */
  background-image: repeating-linear-gradient(
    to right,
    rgba(255, 255, 255, 0.03) 0px,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 4px
  );
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: visible;
  /* Shadow cast onto the page — gives the spine dimension */
  box-shadow: 4px 0 12px rgba(0, 0, 0, 0.20);
}

/* Left-edge shadow — depth on the binding edge */
.spine::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.22) 0%,
    rgba(0, 0, 0, 0.08) 22%,
    transparent 55%
  );
  pointer-events: none;
  z-index: 0;
}

/* Gold/mustard accent line on the right edge — classic hardbound detail */
.spine::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: 2px;
  background: rgba(192, 152, 48, 0.50);
  pointer-events: none;
  z-index: 1;
}

/* ── Spine vertical text ── */
.spine-text {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) rotate(180deg);
  writing-mode: vertical-rl;
  font-family: 'Caveat', cursive;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.10em;
  color: rgba(255, 255, 255, 0.25);
  white-space: nowrap;
  pointer-events: none;
  z-index: 1;
}


/* ============================================================
   RIGHT BINDING + TAB NAVIGATION
   ============================================================
   .notebook-back-cover — full-height dark olive strip, always
                  behind tabs. Visible in 10px gaps between tabs,
                  creating the illusion that the tabs are cut into
                  a real hardbound book cover.
   .notebook-tabs — vertically centred container, z-index above
                  the binding strip.
   .nb-tab      — individual paper divider cards, flush right.
                  Active tab matches page colour exactly so it
                  looks like the page itself has a tab cut-out.
   ============================================================ */

/* ── Full-height back cover — one continuous notebook binding ── */
.notebook-back-cover {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: 48px;
  background: #3d4a2e;
  z-index: 400;
  pointer-events: none;
}

/* Page casts a soft shadow onto the left edge of the cover */
.notebook-back-cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(to right, rgba(0,0,0,0.18), transparent);
}

/* ── Tab container — vertically centred, flush right ── */
.notebook-tabs {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;  /* dark cover shows between tabs */
  z-index: 500;
}

/* ── Each tab — a paper divider card ── */
.nb-tab {
  position: relative;
  width: 38px;
  height: 68px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;

  /* Warm paper — slightly darker/different than the page */
  background: #e8e3d6;
  border-radius: 5px 0 0 5px;
  border: 0.5px solid rgba(100, 85, 55, 0.20);
  border-right: none;
  margin-right: 0;

  box-shadow: -2px 1px 6px rgba(0, 0, 0, 0.15);

  transition: background 0.25s ease, width 0.25s ease, box-shadow 0.25s ease;
}

/* Active tab — same colour as the page: looks cut from it */
.nb-tab.active {
  background: #faf8f4;
  width: 42px;
  box-shadow: -3px 1px 10px rgba(0, 0, 0, 0.18);
  border-color: rgba(100, 85, 55, 0.12);
}

/* Hover — slides out slightly, paper warms */
.nb-tab:hover:not(.active) {
  background: #f0ebe0;
  width: 40px;
}

.nb-tab:hover .nb-tab-label {
  color: #2e2a1e;
}

/* Coloured dot */
.nb-tab-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #5a6e48;
  flex-shrink: 0;
}

/* Vertical label */
.nb-tab-label {
  font-family: 'Caveat', cursive;
  font-size: 11px;
  font-weight: 600;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  color: #6e6555;
  letter-spacing: 0.04em;
  line-height: 1;
  user-select: none;
  transition: color 0.25s ease;
}

.nb-tab.active .nb-tab-label {
  color: #1e1a10;
}

/* Tab card pushes forward during page-flip click */
.nb-tab.tab-lifting {
  width: 44px !important;
  box-shadow:
    -5px 0 16px rgba(0, 0, 0, 0.22),
    -2px 0 5px  rgba(0, 0, 0, 0.12) !important;
}


/* ============================================================
   STICKY NOTES
   ============================================================ */

.sticky {
  position: absolute;
  padding: 10px 12px 13px;
  box-shadow: 2px 3px 8px rgba(0, 0, 0, 0.12);
  font-family: 'Caveat', cursive;
  cursor: default;
  z-index: 4;
  transition: box-shadow 0.22s ease, z-index 0s;
}

.sticky:hover {
  box-shadow: 4px 6px 18px rgba(0, 0, 0, 0.18);
  z-index: 10;
}

/* Colour variants */
.sticky-sage    { background: var(--sticky-sage);    width: 132px; }
.sticky-yellow  { background: var(--sticky-yellow);  width: 142px; }
.sticky-pink    { background: var(--sticky-pink);    width: 138px; }
.sticky-cream   { background: var(--sticky-cream);   width: 136px; }
.sticky-peach   { background: var(--sticky-peach);   width: 130px; }
.sticky-blue    { background: var(--sticky-blue);    width: 128px; }

/* Sticky label */
.sticky-label {
  display: block;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  opacity: 0.45;
  margin-bottom: 5px;
  color: var(--ink);
}

/* Sticky body text */
.sticky-body {
  font-size: 13px;
  line-height: 1.42;
  color: var(--ink-soft);
  font-weight: 400;
}

/* Positioned stickies in hero collage — more rotation, more overlap */
.sticky-observe    { top: 162px; left: 6px;   --sticky-rot: rotate(-3.8deg); animation: floatA 7s ease-in-out infinite; }
.sticky-pattern    { top: 150px; left: 176px; --sticky-rot: rotate(3.2deg);  animation: floatB 9s ease-in-out 1.2s infinite; }
.sticky-insight    { top: 320px; left: 4px;   --sticky-rot: rotate(3.6deg);  animation: floatC 8s ease-in-out 0.6s infinite; }
.sticky-direction  { top: 308px; left: 174px; --sticky-rot: rotate(-2.8deg); animation: floatA 8.5s ease-in-out 2s infinite; }

/* ── Extra hero collage element positions ── */
.hero-torn  {
  /* Overlaps the right edge of the polaroid — the paper feels pinned over it */
  top: 2px;
  right: -6px;
  width: 134px;
  transform: rotate(2.4deg);
  z-index: 5;
}
.hero-venn  {
  top: 210px;
  right: 0;
  width: 148px;
}
.hero-notes {
  top: 476px;
  right: 2px;
  transform: rotate(-2.2deg);
}
.hero-dubai {
  top: 506px;
  left: 4px;
  max-width: 160px;
}


/* ============================================================
   TAPE STRIPS
   ============================================================ */

.tape {
  position: absolute;
  height: 16px;
  border-radius: 1px;
  pointer-events: none;
  z-index: 5;
}

/* Tape on stickies — default centered at top */
.tape-on-sticky {
  top: -9px;
  left: 50%;
  transform: translateX(-50%);
}

/* Tape colour variants */
.tape-default { background: var(--tape-default); }
.tape-green   { background: var(--tape-green); }
.tape-blue    { background: var(--tape-blue); }
.tape-pink    { background: var(--tape-pink); }


/* ============================================================
   POLAROID PHOTO FRAMES
   ============================================================ */

.polaroid {
  position: absolute;
  z-index: 3;
}

.polaroid-frame {
  background: #fff;
  padding: 10px 10px 30px;
  box-shadow: var(--sh-m);
}

.polaroid-img {
  width: 128px;
  height: 112px;
  overflow: hidden;
  background: var(--paper-warm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.polaroid-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  height: 100%;
  background: #e8ddd0;
}

.photo-placeholder span {
  font-size: 28px;
}

.photo-placeholder small {
  font-family: 'Caveat', cursive;
  font-size: 10px;
  color: var(--ink-muted);
  text-align: center;
  line-height: 1.3;
}

/* Polaroid caption */
.polaroid-caption {
  font-family: 'Caveat', cursive;
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-faint);
  text-align: center;
  margin-top: 6px;
  letter-spacing: 0.04em;
}

/* Hero polaroid position — sits above stickies, bottom edge overlaps their tops */
.hero-polaroid {
  top: 10px;
  left: 82px;
  z-index: 6;
}

/* Cafe photo: use real image if available */
.polaroid-cafe {
  background: #c8b8a0;
}

.polaroid-cafe img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* ============================================================
   TORN PAPER FRAGMENTS
   ============================================================ */

.torn-paper {
  position: absolute;
  background: var(--sticky-white);
  padding: 14px 16px 16px;
  box-shadow: var(--sh-s);
  font-family: 'Caveat', cursive;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-mid);
  z-index: 4;
}

.torn-paper::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 14px;
  background: var(--sticky-white);
  clip-path: polygon(
    0% 100%, 2% 30%, 4% 80%, 7% 20%, 10% 75%,
    13% 25%, 16% 85%, 19% 15%, 22% 70%, 25% 35%,
    28% 90%, 31% 10%, 34% 65%, 37% 30%, 40% 80%,
    43% 20%, 46% 60%, 49% 40%, 52% 85%, 55% 15%,
    58% 70%, 61% 30%, 64% 80%, 67% 20%, 70% 65%,
    73% 35%, 76% 90%, 79% 10%, 82% 70%, 85% 30%,
    88% 80%, 91% 15%, 94% 65%, 97% 35%, 100% 55%,
    100% 100%
  );
}

/* Paperclip decoration */
.paperclip {
  position: absolute;
  top: -22px;
  right: 14px;
  width: 14px;
  height: 28px;
  pointer-events: none;
}


/* ============================================================
   VENN DIAGRAM (hand-drawn sketch)
   ============================================================ */

.venn-container {
  position: absolute;
  z-index: 3;
}

.venn-caption {
  font-family: 'Caveat', cursive;
  font-size: 11px;
  color: var(--ink-faint);
  text-align: center;
  margin-top: 4px;
  font-style: italic;
}


/* ============================================================
   NOTES TO SELF CARD
   ============================================================ */

.notes-card {
  position: absolute;
  background: var(--sticky-cream);
  padding: 12px 14px 14px;
  box-shadow: var(--sh-s);
  z-index: 4;
  width: 132px;
}

.notes-card-title {
  font-family: 'Caveat', cursive;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mid);
  margin-bottom: 8px;
  opacity: 0.7;
}

.notes-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.notes-card ul li {
  font-family: 'Caveat', cursive;
  font-size: 12.5px;
  line-height: 1.35;
  color: var(--ink-soft);
  padding-left: 10px;
  position: relative;
}

.notes-card ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--olive);
}


/* ============================================================
   DUBAI NOTE
   ============================================================ */

.dubai-note {
  position: absolute;
  font-family: 'Caveat', cursive;
  font-size: 13px;
  font-weight: 500;
  font-style: italic;
  line-height: 1.5;
  color: var(--ink-muted);
  z-index: 3;
  pointer-events: none;
}


/* ============================================================
   PAGE FLIP TRANSITION
   Spine (.spine) and tabs (.tab-nav) are position:fixed and
   sit above the .page stacking context — they never move.
   Only .page participates in the 3D flip.
   perspective() is embedded in the transform so no parent
   change is needed (avoids containing-block issues with fixed
   children).
   ============================================================ */

/* ── Keyframes ── */

@keyframes pageFlipOut {
  0%   { transform: perspective(1800px) rotateY(0deg);   opacity: 1; }
  100% { transform: perspective(1800px) rotateY(-90deg); opacity: 0; }
}

/* ── Class applied by JS on navigation ── */

.page-flip-out {
  animation: pageFlipOut 0.62s cubic-bezier(0.4, 0, 1, 1) forwards;
  transform-origin: left center;
  pointer-events: none;
  will-change: transform, opacity;
}

/* ── Shadow overlay that sweeps across as the page turns ── */

.page-flip-shadow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  background: linear-gradient(
    to left,
    rgba(30, 26, 16, 0.22) 0%,
    rgba(30, 26, 16, 0.08) 42%,
    transparent 72%
  );
  animation: pageShadowSweep 0.62s ease forwards;
}

@keyframes pageShadowSweep {
  0%   { opacity: 0; }
  28%  { opacity: 1; }
  100% { opacity: 0; }
}

/* ── Reduced-motion: replace 3D flip with a simple cross-fade ── */

@media (prefers-reduced-motion: reduce) {
  @keyframes pageFlipOut {
    0%   { opacity: 1; transform: none; }
    100% { opacity: 0; transform: none; }
  }

  .page-flip-shadow { display: none; }
}