diff --git a/plans/series-cover-mockup.html b/plans/series-cover-mockup.html
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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<title>Series Cover Layout Options</title>
+<style>
+  body {
+    font-family: system-ui, sans-serif;
+    background: #1a1b26;
+    color: #c0caf5;
+    padding: 40px;
+    max-width: 1200px;
+    margin: 0 auto;
+  }
+  h1 { margin-bottom: 10px; }
+  .subtitle { color: #9aa5ce; margin-bottom: 40px; }
+
+  .options {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 40px;
+  }
+  .option {
+    background: #24283b;
+    border-radius: 12px;
+    padding: 24px;
+    text-align: center;
+  }
+  .option h2 { margin: 0 0 8px 0; font-size: 1.1rem; color: #7aa2f7; }
+  .option .desc { color: #9aa5ce; font-size: 0.85rem; margin-bottom: 20px; }
+
+  /* === Common book cover placeholder === */
+  .cover {
+    width: 80px;
+    height: 120px;
+    border-radius: 4px;
+    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
+    background: linear-gradient(135deg, #414868, #1a1b26);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 11px;
+    color: #565f89;
+    font-weight: bold;
+    flex-shrink: 0;
+  }
+
+  /* ============================================================
+     OPTION A: Stacked Cascade (pile of books, top-left offset)
+     ============================================================ */
+  .stacked-cascade {
+    position: relative;
+    width: 260px;
+    height: 200px;
+    margin: 0 auto;
+  }
+  .stacked-cascade .cover {
+    position: absolute;
+  }
+  .stacked-cascade .cover:nth-child(1) { top: 0; left: 0; z-index: 7; }
+  .stacked-cascade .cover:nth-child(2) { top: 8px; left: 8px; z-index: 6; opacity: 0.92; }
+  .stacked-cascade .cover:nth-child(3) { top: 16px; left: 16px; z-index: 5; opacity: 0.85; }
+  .stacked-cascade .cover:nth-child(4) { top: 24px; left: 24px; z-index: 4; opacity: 0.78; }
+  .stacked-cascade .cover:nth-child(5) { top: 32px; left: 32px; z-index: 3; opacity: 0.7; }
+  .stacked-cascade .cover:nth-child(6) { top: 40px; left: 40px; z-index: 2; opacity: 0.65; }
+  .stacked-cascade .cover:nth-child(7) { top: 48px; left: 48px; z-index: 1; opacity: 0.6; }
+
+  .stacked-cascade:hover .cover:nth-child(1) { top: 0; left: 0; }
+  .stacked-cascade:hover .cover:nth-child(2) { top: 6px; left: 12px; }
+  .stacked-cascade:hover .cover:nth-child(3) { top: 14px; left: 24px; }
+  .stacked-cascade:hover .cover:nth-child(4) { top: 22px; left: 36px; }
+  .stacked-cascade:hover .cover:nth-child(5) { top: 30px; left: 50px; }
+  .stacked-cascade:hover .cover:nth-child(6) { top: 40px; left: 64px; }
+  .stacked-cascade:hover .cover:nth-child(7) { top: 50px; left: 78px; }
+  .stacked-cascade .cover { transition: all 0.3s ease; }
+
+  /* ============================================================
+     OPTION B: Grid Mosaic (mini bookshelf grid)
+     ============================================================ */
+  .grid-mosaic {
+    width: 200px;
+    height: 200px;
+    margin: 0 auto;
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    grid-template-rows: repeat(3, 1fr);
+    gap: 4px;
+    padding: 8px;
+    background: #1a1b26;
+    border-radius: 8px;
+    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
+  }
+  .grid-mosaic .cover {
+    width: 100%;
+    height: 100%;
+    border-radius: 3px;
+    font-size: 9px;
+  }
+  .grid-mosaic .cover.spacer {
+    background: transparent;
+    box-shadow: none;
+  }
+
+  /* ============================================================
+     OPTION C: Fanned Bottom (arc from bottom center, upward)
+     ============================================================ */
+  .fanned-bottom {
+    position: relative;
+    width: 280px;
+    height: 200px;
+    margin: 0 auto;
+  }
+  .fanned-bottom .cover {
+    position: absolute;
+    bottom: 0;
+    left: 50%;
+    margin-left: -40px; /* half cover width */
+    transform-origin: bottom center;
+  }
+  .fanned-bottom .cover:nth-child(1) { z-index: 7; transform: rotate(0deg); }
+  .fanned-bottom .cover:nth-child(2) { z-index: 6; transform: rotate(-12deg); opacity: 0.92; }
+  .fanned-bottom .cover:nth-child(3) { z-index: 5; transform: rotate(12deg); opacity: 0.92; }
+  .fanned-bottom .cover:nth-child(4) { z-index: 4; transform: rotate(-24deg); opacity: 0.82; }
+  .fanned-bottom .cover:nth-child(5) { z-index: 3; transform: rotate(24deg); opacity: 0.82; }
+  .fanned-bottom .cover:nth-child(6) { z-index: 2; transform: rotate(-36deg); opacity: 0.72; }
+  .fanned-bottom .cover:nth-child(7) { z-index: 1; transform: rotate(36deg); opacity: 0.72; }
+
+  .fanned-bottom:hover .cover:nth-child(1) { transform: rotate(0deg); }
+  .fanned-bottom:hover .cover:nth-child(2) { transform: rotate(-15deg); }
+  .fanned-bottom:hover .cover:nth-child(3) { transform: rotate(15deg); }
+  .fanned-bottom:hover .cover:nth-child(4) { transform: rotate(-30deg); }
+  .fanned-bottom:hover .cover:nth-child(5) { transform: rotate(30deg); }
+  .fanned-bottom:hover .cover:nth-child(6) { transform: rotate(-42deg); }
+  .fanned-bottom:hover .cover:nth-child(7) { transform: rotate(42deg); }
+  .fanned-bottom .cover { transition: all 0.3s ease; }
+
+  /* ============================================================
+     OPTION D: Perspective Shelf (3D standing books)
+     ============================================================ */
+  .perspective-shelf {
+    width: 280px;
+    height: 200px;
+    margin: 0 auto;
+    perspective: 600px;
+    display: flex;
+    align-items: flex-end;
+    justify-content: center;
+    gap: 3px;
+    padding-bottom: 20px;
+  }
+  .perspective-shelf .cover {
+    transform: rotateY(-15deg);
+    transition: transform 0.3s ease;
+  }
+  .perspective-shelf:hover .cover {
+    transform: rotateY(0deg);
+  }
+  .perspective-shelf .cover:nth-child(odd) {
+    transform: rotateY(-18deg) translateZ(2px);
+  }
+  .perspective-shelf .cover:nth-child(even) {
+    transform: rotateY(-12deg) translateZ(-1px);
+  }
+  .perspective-shelf:hover .cover:nth-child(odd) {
+    transform: rotateY(-5deg) translateZ(4px);
+  }
+  .perspective-shelf:hover .cover:nth-child(even) {
+    transform: rotateY(-5deg) translateZ(2px);
+  }
+
+  /* === Demo colors for covers === */
+  .c1 { background: linear-gradient(135deg, #f7768e, #c53b53) !important; color: #fff !important; }
+  .c2 { background: linear-gradient(135deg, #ff9e64, #c97423) !important; color: #fff !important; }
+  .c3 { background: linear-gradient(135deg, #e0af68, #b08830) !important; color: #fff !important; }
+  .c4 { background: linear-gradient(135deg, #9ece6a, #6d9c3a) !important; color: #fff !important; }
+  .c5 { background: linear-gradient(135deg, #73daca, #3fb0a5) !important; color: #fff !important; }
+  .c6 { background: linear-gradient(135deg, #7aa2f7, #4070d4) !important; color: #fff !important; }
+  .c7 { background: linear-gradient(135deg, #bb9af7, #8b6fd4) !important; color: #fff !important; }
+
+  .series-label {
+    margin-top: 16px;
+    font-size: 14px;
+    font-weight: 600;
+    color: #c0caf5;
+  }
+  .series-meta {
+    font-size: 12px;
+    color: #565f89;
+    margin-top: 4px;
+  }
+
+  .hover-hint {
+    font-size: 11px;
+    color: #565f89;
+    margin-top: 12px;
+    font-style: italic;
+  }
+</style>
+</head>
+<body>
+  <h1>Series Card Cover Layouts</h1>
+  <p class="subtitle">4 options for displaying multi-cover composites on the /series browse page. Hover to see animation.</p>
+
+  <div class="options">
+    <!-- Option A -->
+    <div class="option">
+      <h2>A. Stacked Cascade</h2>
+      <p class="desc">Covers stacked diagonally with small offset, like a pile of books on a table</p>
+      <div class="stacked-cascade">
+        <div class="cover c1">#1</div>
+        <div class="cover c2">#2</div>
+        <div class="cover c3">#3</div>
+        <div class="cover c4">#4</div>
+        <div class="cover c5">#5</div>
+        <div class="cover c6">#6</div>
+        <div class="cover c7">#7</div>
+      </div>
+      <div class="series-label">The Expanse</div>
+      <div class="series-meta">7 of 9 books</div>
+      <div class="hover-hint">hover to spread</div>
+    </div>
+
+    <!-- Option B -->
+    <div class="option">
+      <h2>B. Grid Mosaic</h2>
+      <p class="desc">Covers tiled in a 3x3 grid, like a mini bookshelf. Clean and dense.</p>
+      <div class="grid-mosaic">
+        <div class="cover c1">#1</div>
+        <div class="cover c2">#2</div>
+        <div class="cover c3">#3</div>
+        <div class="cover c4">#4</div>
+        <div class="cover c5">#5</div>
+        <div class="cover c6">#6</div>
+        <div class="cover c7">#7</div>
+        <div class="cover spacer"></div>
+        <div class="cover spacer"></div>
+      </div>
+      <div class="series-label">The Expanse</div>
+      <div class="series-meta">7 of 9 books</div>
+    </div>
+
+    <!-- Option C -->
+    <div class="option">
+      <h2>C. Fanned Bottom Arc</h2>
+      <p class="desc">Like a hand of cards fanned from the bottom center, spreading upward</p>
+      <div class="fanned-bottom">
+        <div class="cover c1">#1</div>
+        <div class="cover c2">#2</div>
+        <div class="cover c3">#3</div>
+        <div class="cover c4">#4</div>
+        <div class="cover c5">#5</div>
+        <div class="cover c6">#6</div>
+        <div class="cover c7">#7</div>
+      </div>
+      <div class="series-label">The Expanse</div>
+      <div class="series-meta">7 of 9 books</div>
+      <div class="hover-hint">hover to spread wider</div>
+    </div>
+
+    <!-- Option D -->
+    <div class="option">
+      <h2>D. Perspective Shelf</h2>
+      <p class="desc">Books standing side-by-side with CSS 3D perspective, like a real shelf viewed at angle</p>
+      <div class="perspective-shelf">
+        <div class="cover c1">#1</div>
+        <div class="cover c2">#2</div>
+        <div class="cover c3">#3</div>
+        <div class="cover c4">#4</div>
+        <div class="cover c5">#5</div>
+        <div class="cover c6">#6</div>
+        <div class="cover c7">#7</div>
+      </div>
+      <div class="series-label">The Expanse</div>
+      <div class="series-meta">7 of 9 books</div>
+      <div class="hover-hint">hover to flatten</div>
+    </div>
+  </div>
+</body>
+</html>
