/* ═══════════════════════════════════════════════════════════════
   CHURCH HISTORY TIMELINE — Scroll-Animated Parallax Panels
   ═══════════════════════════════════════════════════════════════ */

/* ── Section Container ────────────────────────────────────────── */
.history-timeline {
  position: relative;
  padding: 100px 0 40px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg) 0%, #f0f3f9 50%, var(--bg) 100%);
  z-index: 1; /* Establishes stacking context */
}

#canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 2; /* Sits above backgrounds but below text content */
}

.history-timeline .section-head {
  text-align: center;
  margin-bottom: 80px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Vertical Spine (Center Line) ─────────────────────────────── */
.timeline-spine {
  display: none;
}

@media (min-width: 769px) {
  .timeline-spine {
    display: block;
    position: absolute;
    left: 50%;
    top: 240px;
    bottom: 80px;
    width: 3px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 3px;
    transform: translateX(-50%);
    z-index: 2;
  }

  .timeline-spine-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(180deg, var(--accent), var(--accent2));
    border-radius: 3px;
    transition: height 0.1s linear;
  }
}

/* ── Panel Base ───────────────────────────────────────────────── */
.history-panel {
  position: relative;
  width: 100%;
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.history-panel.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.history-panel-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 500px;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* ── Timeline Node (dot on spine) ─────────────────────────────── */
@media (min-width: 769px) {
  .history-panel::before {
    content: attr(data-panel);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 16px;
    display: grid;
    place-items: center;
    z-index: 5;
    box-shadow: 0 0 0 6px var(--bg), 0 4px 20px rgba(99, 140, 255, 0.3);
    opacity: 0;
    transition: opacity 0.5s var(--ease) 0.3s, transform 0.5s var(--ease) 0.3s;
  }

  .history-panel.is-visible::before {
    opacity: 1;
  }
}

/* ── Illustration Side ────────────────────────────────────────── */
.history-illust-side {
  position: relative;
  background: transparent;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  z-index: 1; /* Sit behind the WebGL canvas layer */
}

.history-illust-clip {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  --splash-main: 130%;
  --splash-lobe-a: 80%;
  --splash-lobe-b: 80%;
  --splash-lobe-c: 72%;
  --splash-lobe-d: 64%;
  --splash-drop-a: 36%;
  --splash-drop-b: 30%;
  --splash-drop-c: 26%;
  --splash-edge-opacity: 0;
  --splash-edge-scale: 1;
  -webkit-mask-image:
    radial-gradient(circle at 50% 50%, #000 0 var(--splash-main), transparent calc(var(--splash-main) + 9%)),
    radial-gradient(circle at 26% 36%, #000 0 var(--splash-lobe-a), transparent calc(var(--splash-lobe-a) + 7%)),
    radial-gradient(circle at 72% 32%, #000 0 var(--splash-lobe-b), transparent calc(var(--splash-lobe-b) + 7%)),
    radial-gradient(circle at 34% 72%, #000 0 var(--splash-lobe-c), transparent calc(var(--splash-lobe-c) + 7%)),
    radial-gradient(circle at 74% 74%, #000 0 var(--splash-lobe-d), transparent calc(var(--splash-lobe-d) + 7%)),
    radial-gradient(circle at 16% 58%, #000 0 var(--splash-drop-a), transparent calc(var(--splash-drop-a) + 5%)),
    radial-gradient(circle at 86% 46%, #000 0 var(--splash-drop-b), transparent calc(var(--splash-drop-b) + 5%)),
    radial-gradient(circle at 58% 12%, #000 0 var(--splash-drop-c), transparent calc(var(--splash-drop-c) + 5%));
  mask-image:
    radial-gradient(circle at 50% 50%, #000 0 var(--splash-main), transparent calc(var(--splash-main) + 9%)),
    radial-gradient(circle at 26% 36%, #000 0 var(--splash-lobe-a), transparent calc(var(--splash-lobe-a) + 7%)),
    radial-gradient(circle at 72% 32%, #000 0 var(--splash-lobe-b), transparent calc(var(--splash-lobe-b) + 7%)),
    radial-gradient(circle at 34% 72%, #000 0 var(--splash-lobe-c), transparent calc(var(--splash-lobe-c) + 7%)),
    radial-gradient(circle at 74% 74%, #000 0 var(--splash-lobe-d), transparent calc(var(--splash-lobe-d) + 7%)),
    radial-gradient(circle at 16% 58%, #000 0 var(--splash-drop-a), transparent calc(var(--splash-drop-a) + 5%)),
    radial-gradient(circle at 86% 46%, #000 0 var(--splash-drop-b), transparent calc(var(--splash-drop-b) + 5%)),
    radial-gradient(circle at 58% 12%, #000 0 var(--splash-drop-c), transparent calc(var(--splash-drop-c) + 5%));
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  will-change: mask-image, -webkit-mask-image;
}

.history-illust-clip::after {
  content: '';
  position: absolute;
  inset: -12%;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0) 0 28%, rgba(255, 255, 255, 0.78) 31%, transparent 39%),
    radial-gradient(circle at 28% 38%, rgba(255, 255, 255, 0.58) 0 11%, transparent 18%),
    radial-gradient(circle at 76% 34%, rgba(255, 255, 255, 0.52) 0 9%, transparent 16%),
    radial-gradient(circle at 18% 62%, rgba(99, 140, 255, 0.36) 0 7%, transparent 13%),
    radial-gradient(circle at 86% 48%, rgba(99, 140, 255, 0.34) 0 6%, transparent 12%);
  mix-blend-mode: screen;
  opacity: var(--splash-edge-opacity);
  transform: scale(var(--splash-edge-scale)) rotate(-3deg);
  transition: opacity 0.32s ease, transform 0.42s ease;
  z-index: 2;
}

.history-illust-clip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 1;
  transform: scale(1.035);
}

/* Decorative overlay veins / branches pattern */
.history-illust-overlay {
  position: absolute;
  inset: 0;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: soft-light;
}

/* ── Text Side ────────────────────────────────────────────────── */
.history-text-side {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 64px;
  position: relative;
  z-index: 5; /* Keep text side fully interactive and above the canvas layer */
}

.history-text-content {
  max-width: 620px; /* Increased from 540px to make content even wider */
  /* Text slides in from opposite direction */
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.9s var(--ease) 0.2s, transform 0.9s var(--ease) 0.2s;
}

.history-panel.is-visible .history-text-content {
  opacity: 1;
  transform: translateX(0);
}

/* Flipped panels: text slides from left */
.history-panel--flipped .history-text-content {
  transform: translateX(-60px);
}

.history-panel--flipped.is-visible .history-text-content {
  transform: translateX(0);
}

/* ── Flipped Layout (even panels) ─────────────────────────────── */
.history-panel--flipped .history-panel-inner {
  direction: rtl;
}

.history-panel--flipped .history-panel-inner > * {
  direction: ltr;
}

/* ── Point Number Badge ───────────────────────────────────────── */
.history-point-num {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 16px;
  border: 2px solid var(--accent);
  border-radius: 999px;
  margin-bottom: 20px;
  opacity: 0.85;
}

/* ── Title ────────────────────────────────────────────────────── */
.history-text-content h3 {
  font-size: clamp(1.9rem, 3.5vw, 2.7rem); /* Increased size significantly */
  line-height: 1.15;
  margin-bottom: 12px;
  color: var(--fg);
}

/* ── Date ─────────────────────────────────────────────────────── */
.history-date {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
  position: relative;
  padding-left: 20px;
}

.history-date::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 2px;
  background: var(--accent);
}

/* ── Body Text ────────────────────────────────────────────────── */
.history-text-content p {
  font-size: 19.5px; /* Increased from 17.5px */
  line-height: 1.85;   /* Increased from 1.8 */
  color: var(--muted);
}

.history-text-content p em {
  color: var(--accent);
  font-weight: 600;
  font-style: normal;
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE — Stack panels vertically on mobile
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .history-timeline {
    padding: 40px 0 10px;
  }

  .history-timeline .section-head {
    margin-bottom: 30px;
  }

  .history-panel-inner {
    grid-template-columns: 1fr 1.2fr;
    min-height: auto;
  }

  .history-illust-side {
    min-height: 200px;
  }

  .history-text-side {
    padding: 20px 16px;
  }

  .history-text-content {
    max-width: 100%;
  }

  .history-text-content h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
  }

  .history-text-content p {
    font-size: 13.5px;
    line-height: 1.5;
  }

  .history-point-num {
    font-size: 10px;
    padding: 3px 8px;
    margin-bottom: 8px;
  }

  .history-date {
    font-size: 11px;
    margin-bottom: 8px;
    padding-left: 14px;
  }

  /* Mobile: slide text up slightly */
  .history-text-content,
  .history-panel--flipped .history-text-content {
    transform: translateY(20px);
  }

  .history-panel.is-visible .history-text-content,
  .history-panel--flipped.is-visible .history-text-content {
    transform: translateY(0);
  }

  .history-panel {
    margin-bottom: 16px;
  }

  .history-panel::before {
    display: none;
  }
}

@media (max-width: 480px) {
  .history-panel-inner {
    grid-template-columns: 1fr 1.1fr;
  }

  .history-illust-side {
    min-height: 160px;
  }

  .history-text-side {
    padding: 12px 10px;
  }

  .history-text-content h3 {
    font-size: 1.05rem;
    margin-bottom: 4px;
  }

  .history-text-content p {
    font-size: 11.5px;
    line-height: 1.45;
  }

  .history-point-num {
    font-size: 9px;
    padding: 2px 6px;
    margin-bottom: 6px;
  }

  .history-date {
    font-size: 10px;
    margin-bottom: 6px;
  }
}

/* ── Subtle Entrance Micro-animation for Point Numbers ─────── */
@keyframes pointPulse {
  0% { box-shadow: 0 0 0 0 rgba(99, 140, 255, 0.4); }
  70% { box-shadow: 0 0 0 12px rgba(99, 140, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(99, 140, 255, 0); }
}

.history-panel.is-visible .history-point-num {
  animation: pointPulse 1.5s ease-out 0.5s;
}