:root {
    --bg-color: #050608;
    --card-bg: rgba(16, 18, 22, 0.88);
    --card-border: rgba(255, 220, 151, 0.14);
    --gold: #d9b15f;
    --gold-hover: #f0cd8d;
    --gold-glow: rgba(217, 177, 95, 0.28);
    --copper: #9f5b2f;
    --ink-blue: #0d1828;
    --ember: #ff8a3d;
    --text-primary: #f7f1e6;
    --text-secondary: #c3b9a4;
    --text-muted: #746b5d;
    --input-bg: rgba(255, 248, 231, 0.04);
    --success: #10b981;
    --error: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    overflow-y: auto;
    position: relative;
    padding: 20px;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 170, 73, 0.16), transparent 24%),
        radial-gradient(circle at 82% 26%, rgba(108, 151, 255, 0.12), transparent 22%),
        linear-gradient(180deg, rgba(34, 22, 14, 0.32), rgba(8, 9, 11, 0.92)),
        repeating-linear-gradient(
            90deg,
            rgba(31, 22, 14, 0.88) 0 28px,
            rgba(73, 49, 28, 0.8) 28px 44px,
            rgba(23, 17, 12, 0.92) 44px 58px,
            rgba(92, 67, 42, 0.72) 58px 76px
        ),
        linear-gradient(180deg, #0a0b0d 0%, #111216 100%);
    background-size: auto, auto, auto, auto;
    background-attachment: scroll;
    -webkit-text-size-adjust: 100%;
}

.background-decor {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.library-depth {
    position: absolute;
    left: 0;
    right: 0;
    height: 34%;
    background-repeat: repeat-x;
    opacity: 0.45;
    mix-blend-mode: screen;
}

.depth-back {
    bottom: 18%;
    background-image:
        linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,0.42)),
        repeating-linear-gradient(
            90deg,
            rgba(37, 22, 12, 0.62) 0 18px,
            rgba(118, 73, 40, 0.58) 18px 34px,
            rgba(52, 35, 20, 0.6) 34px 54px,
            rgba(140, 101, 54, 0.45) 54px 68px
        );
    filter: blur(1px);
}

.depth-mid {
    bottom: 8%;
    height: 28%;
    opacity: 0.35;
    background-image:
        linear-gradient(180deg, rgba(255, 183, 94, 0.1), transparent 50%),
        repeating-linear-gradient(
            90deg,
            rgba(56, 37, 21, 0.62) 0 24px,
            rgba(179, 123, 64, 0.44) 24px 46px,
            rgba(34, 24, 17, 0.68) 46px 64px
        );
}

.depth-front {
    bottom: 0;
    height: 18%;
    opacity: 0.24;
    background:
        linear-gradient(180deg, rgba(255, 193, 107, 0.08), rgba(0,0,0,0.7)),
        repeating-linear-gradient(
            90deg,
            rgba(92, 58, 29, 0.75) 0 42px,
            rgba(27, 18, 10, 0.86) 42px 52px
        );
}

.magic-dust {
    position: absolute;
    width: 32vw;
    height: 32vw;
    border-radius: 50%;
    filter: blur(8px);
    opacity: 0.3;
    background-image:
        radial-gradient(circle, rgba(255, 223, 164, 0.82) 0 1px, transparent 1.4px),
        radial-gradient(circle, rgba(255, 170, 89, 0.65) 0 1.2px, transparent 1.7px),
        radial-gradient(circle, rgba(135, 179, 255, 0.5) 0 1px, transparent 1.5px);
    background-size: 28px 28px, 44px 44px, 61px 61px;
    animation: dustFloat 18s linear infinite;
}

.dust-left {
    top: 8%;
    left: -6%;
}

.dust-right {
    bottom: 4%;
    right: -8%;
    animation-duration: 22s;
}

.arcane-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255, 216, 145, 0.12);
    box-shadow: 0 0 40px rgba(255, 177, 79, 0.08), inset 0 0 24px rgba(255, 220, 161, 0.04);
}

.ring-one {
    width: 340px;
    height: 340px;
    top: 7%;
    right: 11%;
}

.ring-two {
    width: 220px;
    height: 220px;
    bottom: 10%;
    left: 9%;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(160px);
    opacity: 0.22;
    animation: orbPulse 7s ease-in-out infinite;
}

@keyframes orbPulse {
    0%, 100% { opacity: 0.12; transform: scale(1); }
    50%       { opacity: 0.20; transform: scale(1.06); }
}

#orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(255, 167, 70, 0.9) 0%, transparent 70%);
    top: -200px; right: -100px;
}

#orb-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(74, 120, 214, 0.86) 0%, transparent 70%);
    bottom: -150px; left: -150px;
    animation-delay: -3.5s;
}

/* Vignette to deepen edges */
.vignette-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 28%, rgba(0,0,0,0.68) 100%);
    pointer-events: none;
    z-index: 1;
}

.container {
    width: 100%;
    max-width: 960px;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Fixed Dimensions Card Layout */
.card {
    background:
        radial-gradient(circle at top left, rgba(255, 219, 164, 0.14), transparent 30%),
        radial-gradient(circle at bottom right, rgba(79, 127, 224, 0.12), transparent 26%),
        linear-gradient(145deg, rgba(18, 16, 18, 0.92) 0%, rgba(13, 17, 24, 0.96) 50%, rgba(24, 16, 12, 0.94) 100%);
    border: 1px solid rgba(255, 220, 151, 0.18);
    border-radius: 12px;
    backdrop-filter: blur(36px) saturate(150%);
    box-shadow: 
        0 38px 90px rgba(0, 0, 0, 0.72),
        0 0 0 1px rgba(255,255,255,0.04),
        inset 0 1px 0 rgba(255,245,228,0.16),
        inset 0 -1px 0 rgba(0,0,0,0.54),
        0 0 90px rgba(217, 177, 95, 0.08);
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    height: 640px;
    overflow: hidden;
    position: relative;
    z-index: 2;
}

.card-aurora {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, transparent 0 14%, rgba(255, 208, 144, 0.12) 24%, transparent 36%),
        radial-gradient(circle at 20% 18%, rgba(255, 192, 95, 0.14), transparent 22%),
        radial-gradient(circle at 80% 84%, rgba(94, 139, 225, 0.12), transparent 22%);
    pointer-events: none;
}

.card-spine {
    position: absolute;
    inset: 10px;
    border-radius: 0;
    border-top: 1px solid rgba(255, 228, 183, 0.04);
    border-left: 1px solid rgba(255, 228, 183, 0.04);
    border-right: 0;
    border-bottom: 0;
    box-shadow: none;
    pointer-events: none;
}

.card-corner {
    position: absolute;
    width: 110px;
    height: 110px;
    pointer-events: none;
    opacity: 0.55;
}

.card-corner-tl {
    top: 10px;
    left: 10px;
    background:
        linear-gradient(90deg, rgba(255, 219, 154, 0.6), rgba(255, 219, 154, 0.06) 72%, transparent 100%) top left / 100% 2px no-repeat,
        linear-gradient(180deg, rgba(255, 219, 154, 0.52), rgba(255, 219, 154, 0.06) 72%, transparent 100%) top left / 2px 100% no-repeat;
}

.card-corner-br {
    right: 10px;
    bottom: 10px;
    background:
        linear-gradient(270deg, rgba(255, 219, 154, 0.52), rgba(255, 219, 154, 0.06) 72%, transparent 100%) bottom right / 100% 2px no-repeat,
        linear-gradient(0deg, rgba(255, 219, 154, 0.46), rgba(255, 219, 154, 0.06) 72%, transparent 100%) bottom right / 2px 100% no-repeat;
}

/* Left panel: Input Forms */
.panel-left {
    padding: 40px 42px;
    border-right: 1px solid rgba(255, 222, 159, 0.08);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    position: relative;
    background: linear-gradient(180deg, rgba(25, 17, 12, 0.3), rgba(13, 18, 26, 0.08));
    z-index: 1;
}

.panel-left::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(204, 164, 59, 0.25), transparent);
    pointer-events: none;
}

/* Right panel: Shelf and Results Listing */
.panel-right {
    padding: 40px 42px;
    background:
        linear-gradient(180deg, rgba(11, 14, 19, 0.68), rgba(10, 12, 18, 0.82)),
        radial-gradient(circle at top, rgba(255, 201, 117, 0.06), transparent 34%);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    position: relative;
}

.panel-right::after {
    content: '';
    position: absolute;
    top: 10%; left: 0;
    width: 1px;
    height: 80%;
    background: linear-gradient(180deg, transparent, rgba(204, 164, 59, 0.08), transparent);
    pointer-events: none;
}

/* Scrollbar styles for panels */
.panel-left::-webkit-scrollbar, .panel-right::-webkit-scrollbar {
    width: 4px;
}
.panel-left::-webkit-scrollbar-thumb, .panel-right::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
}

.header {
    margin-bottom: 28px;
}

.header h1 {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 2.3rem;
    font-weight: 700;
    color: #fff9ed;
    margin-bottom: 8px;
    letter-spacing: -0.8px;
    text-shadow: 0 0 40px rgba(204, 164, 59, 0.18);
}

.header h1 span {
    background: linear-gradient(135deg, var(--gold) 0%, #f0d070 50%, var(--gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-style: italic;
    font-family: 'Playfair Display', serif;
}

.header p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    max-width: 32ch;
}

/* Main Navigation Tabs */
.main-tabs {
    display: flex;
    background: linear-gradient(180deg, rgba(255, 244, 223, 0.05), rgba(255, 255, 255, 0.015));
    border-radius: 16px;
    padding: 6px;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 221, 164, 0.08);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: linear-gradient(135deg, #f0c97f 0%, #b96d33 100%);
    color: #120d09;
    box-shadow: 0 10px 24px rgba(185, 109, 51, 0.28);
}

/* Sub-tabs */
.sub-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.sub-tab-btn {
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sub-tab-btn.active {
    color: #fff0d1;
    border-color: var(--gold);
    background: rgba(217, 177, 95, 0.08);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 8px;
}

/* Consistent Input Styling (prevents browser override) */
input[type="text"], input[type="url"] {
    width: 100%;
    padding: 12px 16px;
    background: var(--input-bg) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-radius: 14px;
    color: var(--text-primary) !important;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

input[type="text"]:focus, input[type="url"]:focus {
    background: rgba(255, 249, 239, 0.07) !important;
    border-color: var(--gold) !important;
    box-shadow: 0 0 0 4px rgba(217, 177, 95, 0.08), 0 0 18px var(--gold-glow) !important;
}

.suggestion-box {
    margin-top: 10px;
    border: 1px solid rgba(255, 223, 167, 0.14);
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(24, 21, 23, 0.96), rgba(14, 17, 24, 0.98));
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
    overflow: hidden;
}

.suggestion-title {
    padding: 10px 14px 8px;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(255, 223, 167, 0.08);
}

.suggestion-list {
    display: flex;
    flex-direction: column;
}

.suggestion-loading {
    padding: 14px;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.suggestion-item {
    border: 0;
    border-top: 1px solid rgba(255,255,255,0.03);
    background: transparent;
    color: inherit;
    cursor: pointer;
    text-align: left;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 3px;
    transition: background 0.18s ease;
}

.suggestion-item:hover {
    background: rgba(217, 177, 95, 0.08);
}

.suggestion-book {
    color: var(--text-primary);
    font-size: 0.94rem;
    font-weight: 600;
}

.suggestion-author {
    color: var(--text-secondary);
    font-size: 0.74rem;
}

/* Fix autofill white bg issue */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--text-primary) !important;
    -webkit-box-shadow: 0 0 0px 1000px #12141a inset !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Tab Contents */
.tab-content, .sub-content {
    display: none;
}
.tab-content.active, .sub-content.active {
    display: flex;
    flex-direction: column;
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px;
    border: none;
    outline: none;
    border-radius: 14px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.search-btn {
    background: linear-gradient(180deg, rgba(255, 246, 225, 0.03), rgba(255, 255, 255, 0.01));
    color: var(--gold-hover);
    border: 1px solid rgba(255, 218, 152, 0.38);
}

.search-btn:hover {
    background: linear-gradient(135deg, #f0c97f 0%, #c17c40 100%);
    color: #140f0b;
    box-shadow: 0 10px 24px rgba(217, 177, 95, 0.24);
}

.download-btn {
    background: linear-gradient(135deg, #f0cf8d 0%, #d97c45 100%);
    color: #140d08;
    margin-top: 15px;
    box-shadow: 0 12px 30px rgba(217, 124, 69, 0.2);
}

.download-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #f5d8a4 0%, #ea9452 100%);
    box-shadow: 0 16px 34px rgba(217, 124, 69, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Shelf Area / Preview Header */
.shelf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 215, 145, 0.08);
    padding-bottom: 12px;
    flex-shrink: 0;
}

.shelf-title {
    font-size: 2.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.shelf-title-book {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 2.3rem;
    font-weight: 700;
    color: #fff9ed;
    letter-spacing: -0.8px;
    text-shadow: 0 0 40px rgba(204, 164, 59, 0.18);
    line-height: 1;
}

.shelf-badge {
    background: rgba(204, 164, 59, 0.06);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.68rem;
    color: var(--gold);
    border: 1px solid rgba(204, 164, 59, 0.15);
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* Empty Shelf State */
.empty-shelf {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    color: var(--text-muted);
    text-align: center;
    border: 1.5px dashed rgba(255, 220, 152, 0.12);
    border-radius: 22px;
    padding: 20px;
    margin: auto 0;
    background:
        radial-gradient(circle at top, rgba(255, 208, 115, 0.08), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.015), rgba(255,255,255,0.01));
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.empty-shelf-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    opacity: 0.3;
}

.empty-shelf p {
    font-size: 0.8rem;
}

/* Results Area */
.book-results-area {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.section-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 160px; /* Restrict height inside panels */
    overflow-y: auto;
    padding-right: 2px;
    margin-bottom: 16px;
}

.results-list::-webkit-scrollbar {
    width: 3px;
}
.results-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 1.5px;
}

.result-item-card {
    background: linear-gradient(180deg, rgba(255, 248, 233, 0.025), rgba(255,255,255,0.01));
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.result-book-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
    margin-bottom: 6px;
}

.result-item-card:hover {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.1);
}

.result-item-card.selected {
    background: linear-gradient(135deg, rgba(217, 177, 95, 0.12), rgba(90, 118, 174, 0.06));
    border-color: var(--gold);
    box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.result-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

.result-format-badge {
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 4px;
}

.result-item-card.selected .result-format-badge {
    background: var(--gold);
    color: #08090b;
}

.result-domain {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.result-link-preview {
    font-size: 0.8rem;
    color: var(--text-secondary);
    word-break: break-all;
    display: block;
    line-height: 1.3;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.result-item-card.selected .result-link-preview {
    color: var(--text-primary);
}

/* Verification Area / Selection Info */
.verification-area {
    margin-top: 10px;
}

.found-source-box {
    background: linear-gradient(135deg, rgba(217, 177, 95, 0.08), rgba(255,255,255,0.02));
    border: 1px solid rgba(204, 164, 59, 0.18);
    border-radius: 16px;
    padding: 14px 18px;
    margin-bottom: 14px;
}

.found-badge {
    display: inline-block;
    background: var(--gold);
    color: #08090b;
    font-weight: 700;
    font-size: 0.62rem;
    padding: 2px 8px;
    border-radius: 6px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.source-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.source-book-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 8px;
}

.source-link {
    color: var(--gold-hover);
    text-decoration: none;
    font-size: 0.8rem;
    word-break: break-all;
    font-weight: 600;
    display: block;
    line-height: 1.3;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

/* Format Card Decks */
.format-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.format-card {
    position: relative;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.01);
    border-radius: 16px;
    padding: 12px 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.format-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.format-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-secondary);
}

.format-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.format-card.active {
    background: linear-gradient(135deg, rgba(217, 177, 95, 0.12), rgba(255,255,255,0.03));
    border-color: var(--gold);
    box-shadow: 0 12px 28px rgba(0,0,0,0.18);
}

.format-card.active .format-title {
    color: #ffffff;
}

.format-selection-group {
    margin-bottom: 15px;
}

/* Status Box */
.status-box {
    margin-top: 15px;
    border-radius: 16px;
    padding: 14px 18px;
    display: flex;
    align-items: flex-start;
    word-break: break-all;
}

.status-icon {
    font-size: 1.15rem;
    margin-right: 10px;
    line-height: 1;
}

.status-content {
    flex: 1;
}

.status-title {
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 2px;
}

.status-message {
    font-size: 0.78rem;
    line-height: 1.35;
    color: var(--text-secondary);
    word-break: break-all;
    word-wrap: break-word;
}

.status-box.processing {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.status-box.success {
    background: rgba(16, 185, 129, 0.04);
    border: 1px solid rgba(16, 185, 129, 0.12);
}

.status-box.success .status-title {
    color: var(--success);
}

.status-box.error {
    background: rgba(239, 68, 68, 0.04);
    border: 1px solid rgba(239, 68, 68, 0.12);
}

.status-box.error .status-title {
    color: var(--error);
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(8, 9, 11, 0.3);
    border-radius: 50%;
    border-top-color: #08090b;
    animation: spin 0.8s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes dustFloat {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(18px, -14px, 0) scale(1.04); }
    100% { transform: translate3d(0, 0, 0) scale(1); }
}

/* Responsive Grid falls back gracefully */
@media (max-width: 850px) {
    body {
        overflow-y: auto;
        min-height: 100dvh;
        padding: 20px 10px;
    }
    .card {
        grid-template-columns: 1fr;
        height: auto;
        min-height: 0;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    .panel-left {
        border-right: none;
        border-bottom: 1px solid var(--card-border);
        height: auto;
    }
    .panel-right {
        height: auto;
    }
    .empty-shelf {
        min-height: 180px;
    }
    .library-depth,
    .arcane-ring,
    .magic-dust {
        opacity: 0.14;
    }
    .glow-orb {
        display: none;
    }
}

@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
    .card {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background:
            radial-gradient(circle at top left, rgba(255, 219, 164, 0.08), transparent 28%),
            linear-gradient(145deg, rgba(18, 16, 18, 0.98) 0%, rgba(13, 17, 24, 0.99) 50%, rgba(24, 16, 12, 0.98) 100%);
    }
}

@media (hover: none) and (pointer: coarse) {
    .card {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        box-shadow:
            0 22px 48px rgba(0, 0, 0, 0.52),
            0 0 0 1px rgba(255,255,255,0.04);
    }
    .magic-dust,
    .arcane-ring,
    .glow-orb {
        display: none;
    }
}