/**
 * Vintage Editorial Scroll Companion — Suspended from Tree Branch
 * Handcrafted interactive cartoon avatar hanging from a tree branch along the right margin.
 *
 * Emran Rafid Editorial Theme
 */

/* ========================================================
   1. TREE BRANCH AT TOP RIGHT
   ======================================================== */
.er-scroll-tree-branch {
  position: fixed;
  top: 0;
  right: 0;
  width: 140px;
  height: 65px;
  z-index: 99988;
  pointer-events: none;
  filter: drop-shadow(0 2.5px 4px rgba(36, 35, 31, 0.16));
}

.er-tree-branch-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  display: block;
}

/* ========================================================
   2. THIN BRAIDED HEMP ROPE (2px width)
   ======================================================== */
.er-scroll-rope {
  position: fixed;
  top: 20px; /* Starts right at the bottom of tree branch knot */
  right: 40px; /* Center aligned with avatar center (right: 12px + 58px/2 = 41px -> 2px rope at right: 40px) */
  width: 2px;
  height: 80px;
  background: repeating-linear-gradient(
    to bottom,
    #8C603D 0px,
    #8C603D 3px,
    #B88958 3px,
    #B88958 5px,
    #5E3D23 5px,
    #5E3D23 7px
  );
  box-shadow: 1px 0 1px rgba(36, 35, 31, 0.22);
  z-index: 99982;
  pointer-events: none;
  transform-origin: top center;
  will-change: height;
  transition: opacity 0.25s ease;
}

/* ========================================================
   3. HANGING AVATAR RUNNER CONTAINER
   ======================================================== */
.er-scroll-runner {
  position: fixed;
  right: 12px;
  top: 0;
  left: auto;
  width: 58px;
  height: 76px;
  pointer-events: auto;
  cursor: pointer;
  z-index: 99985;
  user-select: none;
  will-change: transform;
  transform: translate3d(0, 80px, 0);
  transition: opacity 0.3s ease;
  filter: drop-shadow(0 3px 6px rgba(36, 35, 31, 0.15));
}

/* SVG character wrapper */
.er-runner-char {
  width: 100%;
  height: 100%;
  overflow: visible;
  /* Suspended from top rope connector at (29px, 0px) */
  transform-origin: 29px 0px;
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ========================================================
   4. STATE DYNAMICS: IDLE SMILE vs SLIDING DOWN vs CLIMBING UP
   ======================================================== */

/* STATE A: IDLE & SUSPENDED (Gentle Pendulum Sway & Warm Smile) */
.er-scroll-runner.is-idle .er-runner-char {
  animation: erHangingPendulum 3.6s ease-in-out infinite alternate;
}

.er-scroll-runner.is-idle .leg-left {
  animation: erHangingLegL 2.6s ease-in-out infinite alternate;
}

.er-scroll-runner.is-idle .leg-right {
  animation: erHangingLegR 2.2s ease-in-out infinite alternate;
}

/* Hide focused & look-down elements when idle */
.er-scroll-runner.is-idle .eye-look-down,
.er-scroll-runner.is-idle .eye-look-up,
.er-scroll-runner.is-idle .mouth-focused {
  opacity: 0;
  display: none;
}

/* Warm Joyful Smile & Twinkling Eyes Pop In */
.er-scroll-runner.is-idle .eye-smile,
.er-scroll-runner.is-idle .mouth-smile {
  opacity: 1;
  display: block;
  animation: erSmilePop 0.32s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.er-scroll-runner.is-idle .blush-spot {
  opacity: 0.7;
  display: block;
  transition: opacity 0.3s ease;
}

/* Friendly hand wave after standing idle */
.er-scroll-runner.is-idle.is-waving .arm-right {
  animation: erWaveHand 0.9s ease-in-out infinite alternate;
  transform-origin: 38px 32px;
}

/* STATE B: SCROLLING DOWN (Sliding Downwards along rope) */
.er-scroll-runner.is-running-down .er-runner-char {
  transform: rotate(5deg);
}

.er-scroll-runner.is-running-down .leg-left {
  animation: erRunLegL 0.24s infinite alternate ease-in-out;
}

.er-scroll-runner.is-running-down .leg-right {
  animation: erRunLegR 0.24s infinite alternate ease-in-out;
}

.er-scroll-runner.is-running-down .eye-smile,
.er-scroll-runner.is-running-down .mouth-smile,
.er-scroll-runner.is-running-down .blush-spot {
  opacity: 0;
  display: none;
}

.er-scroll-runner.is-running-down .eye-look-down,
.er-scroll-runner.is-running-down .mouth-focused {
  opacity: 1;
  display: block;
}

/* STATE C: SCROLLING UP (Climbing Upwards along rope) */
.er-scroll-runner.is-running-up .er-runner-char {
  transform: rotate(-5deg);
}

.er-scroll-runner.is-running-up .leg-left {
  animation: erRunLegR 0.24s infinite alternate ease-in-out;
}

.er-scroll-runner.is-running-up .leg-right {
  animation: erRunLegL 0.24s infinite alternate ease-in-out;
}

.er-scroll-runner.is-running-up .eye-smile,
.er-scroll-runner.is-running-up .mouth-smile,
.er-scroll-runner.is-running-up .blush-spot {
  opacity: 0;
  display: none;
}

.er-scroll-runner.is-running-up .eye-look-up,
.er-scroll-runner.is-running-up .mouth-focused {
  opacity: 1;
  display: block;
}

/* ========================================================
   5. SPEECH BUBBLE TOOLTIP (VINTAGE NOTEPAPER STYLE)
   ======================================================== */
.er-runner-bubble {
  position: absolute;
  right: 66px;
  top: 36px;
  transform: translateY(-50%) scale(0.85);
  background-color: var(--er-white, #FCFAF6);
  border: 1.5px solid var(--er-espresso, #49362D);
  box-shadow: 2px 2px 0px var(--er-espresso, #49362D);
  border-radius: var(--er-radius-sm, 3px);
  padding: 6px 11px;
  font-family: var(--er-font-subhead, 'Shorif Sandwip', serif);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--er-ink, #24231F);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
  z-index: 99990;
}

/* Speech bubble pointer arrow pointing right towards avatar */
.er-runner-bubble::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 6px solid var(--er-espresso, #49362D);
}

.er-runner-bubble::before {
  content: "";
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 5px solid var(--er-white, #FCFAF6);
  z-index: 1;
}

/* Show bubble on hover */
.er-scroll-runner:hover .er-runner-bubble {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) scale(1);
}

/* ========================================================
   6. ANIMATION KEYFRAMES
   ======================================================== */

/* Hanging Pendulum Sway from branch rope */
@keyframes erHangingPendulum {
  0% {
    transform: rotate(-3deg);
  }
  50% {
    transform: rotate(2deg);
  }
  100% {
    transform: rotate(-3deg);
  }
}

/* Gentle suspended legs dangle */
@keyframes erHangingLegL {
  0% {
    transform: rotate(-3deg);
  }
  50% {
    transform: rotate(4deg);
  }
  100% {
    transform: rotate(-3deg);
  }
}

@keyframes erHangingLegR {
  0% {
    transform: rotate(4deg);
  }
  50% {
    transform: rotate(-2deg);
  }
  100% {
    transform: rotate(4deg);
  }
}

/* Sliding leg cycle */
@keyframes erRunLegL {
  0% {
    transform: rotate(-24deg);
  }
  100% {
    transform: rotate(24deg);
  }
}

@keyframes erRunLegR {
  0% {
    transform: rotate(24deg);
  }
  100% {
    transform: rotate(-24deg);
  }
}

/* Friendly Hand Wave from shoulder */
@keyframes erWaveHand {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-38deg);
  }
}

/* Warm smile popping in */
@keyframes erSmilePop {
  0% {
    transform: scale(0.6);
    opacity: 0;
  }
  80% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ========================================================
   7. RESPONSIVE & ACCESSIBILITY
   ======================================================== */
@media (max-width: 640px) {
  .er-scroll-tree-branch,
  .er-scroll-rope,
  .er-scroll-runner {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .er-scroll-tree-branch,
  .er-scroll-rope,
  .er-scroll-runner {
    display: none !important;
  }
}