/* ==========================================================================
   VASTU DIVINE — 3D Luxury Interactive Sacred Sketchbook Component
   Inspired by ThreeUI Meng To Sketchbook — Adapted for Classical Vedic Wisdom
   ========================================================================== */

:root {
    --sb-burgundy: #6D0A1D;
    --sb-burgundy-deep: #4D0714;
    --sb-burgundy-soft: rgba(109, 10, 29, 0.08);
    --sb-burgundy-glow: rgba(109, 10, 29, 0.22);
    --sb-gold: #B3791E;
    --sb-gold-light: #D4A045;
    --sb-gold-bright: #F6E27A;
    --sb-gold-soft: rgba(179, 121, 30, 0.12);
    --sb-gold-glow: rgba(179, 121, 30, 0.28);
    --sb-paper: #FDFBF7;
    --sb-paper-dark: #F5EFE6;
    --sb-paper-aged: #EDE6DB;
    --sb-leather: #3D0710;
    --sb-leather-dark: #2A040A;
    --sb-ink: #221D1A;
    --sb-ink-soft: #5C534D;
    --sb-ink-faint: #968C83;
    --sb-border: rgba(179, 121, 30, 0.26);
    --sb-border-focus: rgba(179, 121, 30, 0.7);

    --sb-font-heading: 'Cinzel', Georgia, serif;
    --sb-font-serif: 'Cormorant Garamond', Georgia, serif;
    --sb-font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --sb-font-deva: 'Noto Serif Devanagari', serif;

    --sb-chassis-radius: 14px;
    --sb-transition-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ──────────────────────────────────────────────────────
   1. Component Wrapper & Stage Shell
   ────────────────────────────────────────────────────── */
.sb-component-wrapper {
    position: relative;
    width: 100%;
    max-width: 1260px;
    margin: 48px auto 20px;
    padding: 0 16px;
    user-select: none;
    -webkit-user-select: none;
    box-sizing: border-box;
    outline: none;
}

.sb-component-wrapper:focus-visible {
    outline: 2px dashed var(--sb-gold);
    outline-offset: 8px;
    border-radius: var(--sb-chassis-radius);
}

/* Tab Bar / Chapter Pagination */
.sb-tabs-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.sb-tab-pill {
    appearance: none;
    -webkit-appearance: none;
    border: 1px solid var(--sb-border);
    background: rgba(255, 255, 255, 0.85);
    color: var(--sb-ink-soft);
    padding: 7px 16px;
    border-radius: 9999px;
    font-family: var(--sb-font-body);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.25s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.sb-tab-pill:hover {
    color: var(--sb-burgundy);
    border-color: var(--sb-gold);
    background: #FFFFFF;
    transform: translateY(-1px);
}

.sb-tab-pill.active {
    background: var(--sb-burgundy);
    color: #FFFFFF;
    border-color: var(--sb-burgundy);
    box-shadow: 0 4px 14px var(--sb-burgundy-glow);
}

.sb-stage-frame {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    perspective: 2400px;
    -webkit-perspective: 2400px;
}

/* Atmospheric Ground Shadow Pools */
.sb-shadow-pool {
    position: absolute;
    inset: 6% 4% -3% 4%;
    background: radial-gradient(50% 50% at 50% 68%, 
        rgba(109, 10, 29, 0.16) 0%, 
        rgba(58, 44, 26, 0.22) 35%, 
        transparent 75%);
    filter: blur(36px);
    -webkit-filter: blur(36px);
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.3s ease;
}

.sb-contact-shadow {
    position: absolute;
    inset: 75% 8% 0 8%;
    background: radial-gradient(50% 45% at 50% 45%, 
        rgba(26, 15, 8, 0.42) 0%, 
        rgba(109, 10, 29, 0.14) 45%, 
        transparent 78%);
    filter: blur(16px);
    -webkit-filter: blur(16px);
    pointer-events: none;
    z-index: 0;
}

/* ──────────────────────────────────────────────────────
   2. Realistic Book Chassis & Luxury Leather Binding
   ────────────────────────────────────────────────────── */
.sb-book-chassis {
    position: relative;
    flex: 1 1 auto;
    max-width: 1180px;
    width: 100%;
    aspect-ratio: 16 / 10.6;
    min-height: 650px;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    background: var(--sb-paper);
    border-radius: var(--sb-chassis-radius);
    display: flex;
    overflow: visible;
    z-index: 2;
    cursor: grab;
    touch-action: pan-y;
    /* Physical stacked book block with layered gilded page edges and leather base */
    box-shadow: 
        0 1px 2px rgba(58, 44, 26, 0.12),
        0 8px 16px rgba(58, 44, 26, 0.12),
        0 24px 48px rgba(109, 10, 29, 0.16),
        0 0 0 1px rgba(179, 121, 30, 0.35),
        /* Layered physical paper block underneath */
        4px 7px 0 0 #F5EFE6,
        4px 7px 0 1px rgba(179, 121, 30, 0.28),
        8px 13px 0 0 #EDE6DB,
        8px 13px 0 1px rgba(179, 121, 30, 0.22),
        /* Outer leather book binding backing */
        10px 16px 0 2px var(--sb-leather),
        10px 16px 28px 4px rgba(35, 6, 12, 0.35);
    transition: box-shadow 0.35s ease, transform 0.25s ease;
}

.sb-book-chassis:active {
    cursor: grabbing;
}

/* Outer Leather Binding Trim & Fine Stitching */
.sb-book-chassis::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: calc(var(--sb-chassis-radius) + 5px);
    border: 1px dashed rgba(179, 121, 30, 0.55);
    box-shadow: 
        inset 0 0 0 4px var(--sb-leather),
        inset 0 0 0 5px rgba(212, 160, 69, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.2);
    pointer-events: none;
    z-index: 1;
}

/* Book Interior Glow & Deckle Paper Sheen */
.sb-book-chassis::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--sb-chassis-radius);
    pointer-events: none;
    background: 
        linear-gradient(135deg, rgba(255, 255, 255, 0.55) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, transparent 84%, rgba(109, 10, 29, 0.04) 100%);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.85);
    z-index: 16;
}

/* Gilded Gold Page Edges (Side metallic gilded foil sheen) */
.sb-gilded-edge-right {
    position: absolute;
    top: 6px;
    bottom: 6px;
    right: -7px;
    width: 7px;
    background: linear-gradient(180deg, 
        #B3791E 0%, 
        #F6E27A 25%, 
        #D4A045 50%, 
        #F6E27A 75%, 
        #B3791E 100%);
    border-radius: 0 4px 4px 0;
    box-shadow: 1px 0 3px rgba(0, 0, 0, 0.25);
    z-index: 0;
    pointer-events: none;
}

.sb-gilded-edge-left {
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: -7px;
    width: 7px;
    background: linear-gradient(180deg, 
        #B3791E 0%, 
        #F6E27A 25%, 
        #D4A045 50%, 
        #F6E27A 75%, 
        #B3791E 100%);
    border-radius: 4px 0 0 4px;
    box-shadow: -1px 0 3px rgba(0, 0, 0, 0.25);
    z-index: 0;
    pointer-events: none;
}

/* ──────────────────────────────────────────────────────
   3. Sacred Spine, Rivets & Sewn Center Seam
   ────────────────────────────────────────────────────── */
.sb-center-spine {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 8px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, 
        rgba(40, 28, 18, 0.4) 0%, 
        rgba(109, 10, 29, 0.8) 35%, 
        rgba(179, 121, 30, 0.9) 50%, 
        rgba(109, 10, 29, 0.8) 65%, 
        rgba(40, 28, 18, 0.4) 100%);
    box-shadow: 
        0 0 10px rgba(0, 0, 0, 0.35),
        inset 0 0 4px rgba(0, 0, 0, 0.4);
    z-index: 22;
    pointer-events: none;
}

/* Center Sewn Stitches */
.sb-center-spine::before {
    content: '';
    position: absolute;
    top: 14px;
    bottom: 14px;
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
    background-image: repeating-linear-gradient(180deg, 
        #FAF6F0 0, #FAF6F0 4px, 
        transparent 4px, transparent 10px);
    opacity: 0.85;
}

/* Sacred Spine Rivets (Top & Bottom Brass Studs) */
.sb-spine-rivet {
    position: absolute;
    left: 50%;
    width: 16px;
    height: 16px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #F6E27A 0%, #D4A045 40%, #B3791E 75%, #4D0714 100%);
    box-shadow: 
        0 2px 5px rgba(0, 0, 0, 0.45),
        inset 0 1px 1px rgba(255, 255, 255, 0.8);
    z-index: 26;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sb-spine-rivet::after {
    content: '✦';
    font-size: 8px;
    color: #4D0714;
    line-height: 1;
    transform: translateY(-0.5px);
}

.sb-spine-rivet.top {
    top: 10px;
}

.sb-spine-rivet.bottom {
    bottom: 10px;
}

/* Gutter Shadows on Left and Right Pages */
.sb-gutter-left {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 50%;
    width: 75px;
    background: linear-gradient(to left, 
        rgba(35, 25, 15, 0.28) 0%, 
        rgba(35, 25, 15, 0.12) 40%, 
        transparent 100%);
    pointer-events: none;
    z-index: 18;
}

.sb-gutter-right {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 75px;
    background: linear-gradient(to right, 
        rgba(35, 25, 15, 0.26) 0%, 
        rgba(35, 25, 15, 0.10) 40%, 
        transparent 100%);
    pointer-events: none;
    z-index: 18;
}

/* ──────────────────────────────────────────────────────
   4. Brass Ribbon Bookmark
   ────────────────────────────────────────────────────── */
.sb-ribbon-bookmark {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
    width: 0 !important;
    height: 0 !important;
}

/* ──────────────────────────────────────────────────────
   5. Left & Right Page Spread Layout
   ────────────────────────────────────────────────────── */
.sb-page-half {
    position: relative;
    width: 50%;
    height: 100%;
    padding: 36px 42px;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
    z-index: 5;
    background-color: var(--sb-paper);
    overflow: hidden;
}

.sb-page-half.left {
    border-right: 1px solid rgba(43, 39, 33, 0.08);
    justify-content: center;
    align-items: center;
    padding: 24px 32px;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.7) 0%, transparent 60%),
        linear-gradient(135deg, #FAF6F0 0%, #F5EFE6 100%);
}

.sb-page-half.right {
    justify-content: space-between;
    padding: 26px 36px 20px;
    background: 
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.6) 0%, transparent 60%),
        linear-gradient(135deg, #FAF7F2 0%, #F6F0E7 100%);
}

/* ──────────────────────────────────────────────────────
   6. LEFT PAGE: Archival Visual Plate
   ────────────────────────────────────────────────────── */
.sb-plate-frame {
    position: relative;
    width: 100%;
    max-width: 440px;
    aspect-ratio: 1;
    border: 1px solid var(--sb-border);
    border-radius: 12px;
    padding: 16px;
    background: #FFFFFF;
    box-shadow: 
        inset 0 0 0 1px rgba(255, 255, 255, 0.9),
        0 4px 18px rgba(109, 10, 29, 0.06);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    overflow: hidden;
    transition: transform 0.4s var(--sb-transition-smooth), box-shadow 0.4s ease;
}

.sb-plate-frame:hover {
    box-shadow: 
        inset 0 0 0 1px rgba(255, 255, 255, 1),
        0 8px 24px rgba(109, 10, 29, 0.12);
}

/* Corner Fleurons */
.sb-plate-corner-tl,
.sb-plate-corner-tr,
.sb-plate-corner-bl,
.sb-plate-corner-br {
    position: absolute;
    font-size: 11px;
    color: var(--sb-gold);
    opacity: 0.85;
    line-height: 1;
    pointer-events: none;
    z-index: 5;
}

.sb-plate-corner-tl { top: 7px; left: 9px; }
.sb-plate-corner-tr { top: 7px; right: 9px; }
.sb-plate-corner-bl { bottom: 7px; left: 9px; }
.sb-plate-corner-br { bottom: 7px; right: 9px; }

.sb-plate-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 10.5px;
    letter-spacing: 2.4px;
    text-transform: uppercase;
    color: var(--sb-gold);
    font-weight: 700;
    padding: 0 4px 8px 4px;
    border-bottom: 1px dashed rgba(179, 121, 30, 0.28);
    position: relative;
    z-index: 4;
}

.sb-plate-canvas {
    position: relative;
    width: 100%;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    z-index: 3;
}

.sb-plate-vector {
    width: 100%;
    height: 100%;
    max-height: 255px;
    object-fit: contain;
    filter: drop-shadow(0 8px 20px rgba(109, 10, 29, 0.12));
    transition: transform 0.5s var(--sb-transition-smooth);
}

.sb-plate-frame:hover .sb-plate-vector {
    transform: scale(1.035);
}

.sb-plate-caption-tag {
    font-family: var(--sb-font-serif);
    font-size: 13px;
    font-style: italic;
    color: var(--sb-ink-soft);
    text-align: center;
    letter-spacing: 0.4px;
    border-top: 1px dashed rgba(179, 121, 30, 0.28);
    width: 100%;
    padding-top: 7px;
    position: relative;
    z-index: 4;
    line-height: 1.35;
}

/* ──────────────────────────────────────────────────────
   7. RIGHT PAGE: Luxury Editorial Journal Content
   ────────────────────────────────────────────────────── */
.sb-editorial-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    width: 100%;
    overflow: hidden;
}

.sb-content-top {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0;
    padding-right: 6px;
    scrollbar-width: thin;
    scrollbar-color: rgba(179, 121, 30, 0.4) transparent;
}

.sb-content-top::-webkit-scrollbar {
    width: 4px;
}

.sb-content-top::-webkit-scrollbar-thumb {
    background: rgba(179, 121, 30, 0.35);
    border-radius: 4px;
}

.sb-folio-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--sb-gold);
    padding-bottom: 5px;
    border-bottom: 1px solid rgba(179, 121, 30, 0.22);
}

.sb-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    align-self: flex-start;
    padding: 3px 12px;
    background: var(--sb-burgundy-soft);
    border: 1px solid rgba(109, 10, 29, 0.25);
    border-radius: 9999px;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: var(--sb-burgundy);
    margin-top: 1px;
}

.sb-deva-subhead {
    font-family: var(--sb-font-deva);
    font-size: 13.5px;
    color: var(--sb-gold);
    letter-spacing: 0.8px;
    font-weight: 600;
    margin-top: -2px;
}

.sb-title {
    font-family: var(--sb-font-heading);
    font-size: clamp(1.2rem, 1.6vw, 1.55rem);
    font-weight: 700;
    color: var(--sb-ink);
    line-height: 1.18;
    letter-spacing: -0.3px;
    margin: 0;
}

.sb-subtitle-line {
    font-size: 0.82rem;
    color: #8C5B09;
    font-weight: 600;
    line-height: 1.35;
    margin-top: -1px;
    margin-bottom: 2px;
}

.sb-source-tag {
    font-size: 0.74rem;
    font-style: italic;
    color: #8C5B09;
    margin-top: 1px;
    margin-bottom: 3px;
    border-left: 2px solid #B3791E;
    padding-left: 6px;
    line-height: 1.35;
}

.sb-canon-law-tag {
    font-size: 0.76rem;
    color: #3E352F;
    background: rgba(179, 121, 30, 0.08);
    border: 1px solid rgba(179, 121, 30, 0.25);
    border-left: 3px solid var(--sb-burgundy);
    border-radius: 4px;
    padding: 5px 8px;
    margin: 2px 0 4px;
    line-height: 1.4;
}

.sb-narrative {
    font-family: var(--sb-font-body);
    font-size: clamp(11.8px, 0.92vw, 13px);
    line-height: 1.52;
    color: var(--sb-ink-soft);
    margin: 0;
    font-weight: 400;
}

.sb-attributes-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin: 4px 0 2px;
}

.sb-attr-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(179, 121, 30, 0.28);
    border-radius: 5px;
    font-size: 11px;
    color: var(--sb-ink);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.sb-attr-chip span {
    color: var(--sb-gold);
    font-weight: bold;
}

.sb-content-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(43, 39, 33, 0.12);
    margin-top: 8px;
    flex-shrink: 0;
    position: relative;
    z-index: 15;
    background: inherit;
}

.sb-cta-btn {
    background: var(--sb-burgundy);
    color: #FFFFFF !important;
    padding: 10px 24px;
    border-radius: 9999px;
    font-size: 13.5px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.28s var(--sb-transition-smooth);
    box-shadow: 0 4px 14px var(--sb-burgundy-glow);
    border: 1px solid rgba(255, 255, 255, 0.25);
    cursor: pointer;
    font-family: inherit;
    outline: none;
    flex-shrink: 0;
}

.sb-cta-btn:hover {
    background: var(--sb-burgundy-deep);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(109, 10, 29, 0.35);
}

.sb-cta-btn:active {
    transform: translateY(0);
}

.sb-folio-indicator {
    font-family: var(--sb-font-serif);
    font-size: 14.5px;
    font-style: italic;
    color: var(--sb-ink-faint);
    letter-spacing: 0.5px;
}

/* ──────────────────────────────────────────────────────
   8. 3D Flipping Leaf & Page Turn Curvature
   ────────────────────────────────────────────────────── */
.sb-flipping-leaf {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50%;
    height: 100%;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    z-index: 25;
    pointer-events: none;
    will-change: transform;
}

.sb-flipping-leaf.flip-next {
    left: 50%;
    transform-origin: left center;
}

.sb-flipping-leaf.flip-prev {
    right: 50%;
    transform-origin: right center;
}

.sb-leaf-face {
    position: absolute;
    inset: 0;
    height: 100%;
    width: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    overflow: hidden;
    background: var(--sb-paper);
    box-shadow: inset 0 0 40px rgba(43, 39, 33, 0.08);
}

.sb-leaf-face.front {
    transform: rotateY(0deg);
}

.sb-leaf-face.back {
    transform: rotateY(180deg);
}

/* Dynamic Leaf Shading Mask Overlay during rotation */
.sb-leaf-shadow-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.1s linear;
}

.sb-flipping-leaf.flip-next .sb-leaf-face.front .sb-leaf-shadow-overlay {
    background: linear-gradient(to right, rgba(0, 0, 0, 0.25) 0%, transparent 100%);
}

.sb-flipping-leaf.flip-next .sb-leaf-face.back .sb-leaf-shadow-overlay {
    background: linear-gradient(to left, rgba(0, 0, 0, 0.25) 0%, transparent 100%);
}

.sb-flipping-leaf.flip-prev .sb-leaf-face.front .sb-leaf-shadow-overlay {
    background: linear-gradient(to left, rgba(0, 0, 0, 0.25) 0%, transparent 100%);
}

.sb-flipping-leaf.flip-prev .sb-leaf-face.back .sb-leaf-shadow-overlay {
    background: linear-gradient(to right, rgba(0, 0, 0, 0.25) 0%, transparent 100%);
}

/* ──────────────────────────────────────────────────────
   9. Navigation Controls (Flanking Brass Arrows & Toolbar)
   ────────────────────────────────────────────────────── */
.sb-nav-arrow {
    flex: 0 0 52px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid var(--sb-border);
    background: radial-gradient(circle at 35% 35%, #FFFFFF 0%, #FAF6F0 100%);
    color: var(--sb-burgundy);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 
        0 4px 16px rgba(109, 10, 29, 0.08),
        inset 0 1px 1px rgba(255, 255, 255, 0.9);
    transition: all 0.25s var(--sb-transition-smooth);
    z-index: 30;
    -webkit-tap-highlight-color: transparent;
}

.sb-nav-arrow:hover {
    background: var(--sb-burgundy);
    color: #FFFFFF;
    border-color: var(--sb-burgundy);
    transform: scale(1.08);
    box-shadow: 0 6px 20px var(--sb-burgundy-glow);
}

.sb-nav-arrow:active {
    transform: scale(0.96);
}

.sb-nav-arrow svg {
    width: 22px;
    height: 22px;
    stroke-width: 2.2;
}

/* ──────────────────────────────────────────────────────
   10. Bottom Navigation Toolbar & Plate Directory
   ────────────────────────────────────────────────────── */
.sb-toolbar-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.sb-folio-jump-wrap {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(179, 121, 30, 0.32);
    border-radius: 9999px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.sb-jump-label {
    font-family: var(--sb-font-heading);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--sb-burgundy);
    white-space: nowrap;
}

.sb-jump-select {
    background: transparent;
    border: none;
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--sb-ink);
    cursor: pointer;
    outline: none;
    padding: 2px 6px;
    max-width: 240px;
}

.sb-plate-dots {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(179, 121, 30, 0.24);
    border-radius: 9999px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.sb-plate-dots::-webkit-scrollbar {
    display: none;
}

.sb-plate-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(179, 121, 30, 0.25);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.28s var(--sb-transition-smooth);
    padding: 0;
    flex-shrink: 0;
}

.sb-plate-dot:hover {
    background: var(--sb-gold);
    transform: scale(1.25);
}

.sb-plate-dot.active {
    width: 28px;
    border-radius: 9999px;
    background: var(--sb-burgundy);
    border-color: var(--sb-burgundy);
    box-shadow: 0 2px 8px var(--sb-burgundy-glow);
}

.sb-nav-hint {
    display: none !important;
}

/* ──────────────────────────────────────────────────────
   11. Prefers-Reduced-Motion Accessibility Support
   ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .sb-book-chassis,
    .sb-plate-vector,
    .sb-plate-frame,
    .sb-ribbon-bookmark,
    .sb-cta-btn,
    .sb-nav-arrow,
    .sb-plate-dot {
        transition: none !important;
        transform: none !important;
    }

    .sb-flipping-leaf {
        display: none !important;
    }

    .sb-page-half {
        transition: opacity 0.15s ease;
    }
}

/* ──────────────────────────────────────────────────────
   12. Responsive Breakpoints: Tablet & Mobile
   ────────────────────────────────────────────────────── */
@media (max-width: 992px) {
    .sb-page-half {
        padding: 26px 30px;
    }
    .sb-page-half.left {
        padding: 22px 26px;
    }
    .sb-title {
        font-size: 1.5rem;
    }
    .sb-narrative {
        font-size: 13.5px;
    }
    .sb-plate-vector {
        max-height: 210px;
    }
    .sb-ribbon-bookmark {
        left: calc(50% + 14px);
        width: 20px;
    }
}

@media (max-width: 768px) {
    .sb-component-wrapper {
        margin: 32px auto 16px;
        padding: 0 12px;
    }
    .sb-stage-frame {
        gap: 8px;
    }
    .sb-book-chassis {
        aspect-ratio: auto;
        min-height: auto;
        flex-direction: column;
        border-radius: 12px;
        box-shadow: 
            0 2px 4px rgba(58, 44, 26, 0.1),
            0 12px 24px rgba(58, 44, 26, 0.12),
            0 0 0 1px rgba(179, 121, 30, 0.35);
    }
    .sb-center-spine,
    .sb-gutter-left,
    .sb-gutter-right,
    .sb-spine-rivet,
    .sb-gilded-edge-right,
    .sb-gilded-edge-left {
        display: none;
    }
    .sb-ribbon-bookmark {
        top: -6px;
        right: 28px;
        left: auto;
        width: 18px;
        height: 52px;
    }
    .sb-page-half {
        width: 100%;
        padding: 26px 20px;
    }
    .sb-page-half.left {
        border-right: none;
        border-bottom: 1px dashed rgba(179, 121, 30, 0.28);
        padding: 28px 20px 22px;
    }
    .sb-page-half.right {
        padding: 24px 20px 28px;
    }
    .sb-plate-frame {
        max-width: 320px;
    }
    .sb-plate-vector {
        max-height: 180px;
    }
    .sb-nav-arrow {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        width: 42px;
        height: 42px;
        background: rgba(255, 255, 255, 0.95);
    }
    .sb-nav-arrow.prev {
        left: -6px;
    }
    .sb-nav-arrow.next {
        right: -6px;
    }
    .sb-title {
        font-size: 1.35rem;
    }
    .sb-tabs-header {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 6px;
        scrollbar-width: none;
    }
    .sb-tabs-header::-webkit-scrollbar {
        display: none;
    }
    .sb-tab-pill {
        white-space: nowrap;
        font-size: 11px;
        padding: 6px 14px;
    }
}

/* ──────────────────────────────────────────────────────
   WORKBENCH CALCULATION MODAL & 6-FIELD CANONICAL RESULT
   ────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(20, 20, 20, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.modal-overlay.active {
    display: flex;
    opacity: 1;
}
.modal-window {
    background: #FFFFFF;
    border-radius: 14px;
    width: 100%;
    max-width: 840px;
    max-height: 90vh;
    overflow-y: auto;
    border: 2px solid rgba(179, 121, 30, 0.35);
    box-shadow: 0 20px 60px rgba(109, 10, 29, 0.25);
    animation: sbModalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #221D1A;
}
@keyframes sbModalSlideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.modal-header {
    background: linear-gradient(135deg, #4D0714 0%, #6D0A1D 100%);
    color: #FFFFFF;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(179, 121, 30, 0.4);
}
.modal-header h3 {
    color: #FFFFFF;
    font-size: 1.25rem;
    margin: 0;
    font-family: 'Cinzel', Georgia, serif;
    letter-spacing: 0.5px;
}
.modal-close-btn {
    background: none;
    border: none;
    color: #FFFFFF;
    font-size: 1.6rem;
    cursor: pointer;
    padding: 0 6px;
    line-height: 1;
    transition: transform 0.2s ease, color 0.2s ease;
}
.modal-close-btn:hover {
    transform: scale(1.15);
    color: #F6E27A;
}
.modal-body {
    padding: 28px;
}
.modal-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.modal-form-grid label,
.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.88rem;
    color: #4D0714;
}
.modal-form-grid input,
.modal-form-grid select,
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #D5CCC0;
    border-radius: 6px;
    background: #FAF8F5;
    font-family: inherit;
    font-size: 0.92rem;
    color: #221D1A;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.modal-form-grid input:focus,
.modal-form-grid select:focus,
.form-control:focus {
    outline: none;
    border-color: #B3791E;
    box-shadow: 0 0 0 3px rgba(179, 121, 30, 0.18);
    background: #FFFFFF;
}

/* Modal Buttons */
.btn-gold {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #B3791E;
    color: #FFFFFF !important;
    border: 1px solid #B3791E;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 10px 22px;
    transition: all 0.25s ease;
    box-shadow: 0 4px 14px rgba(179, 121, 30, 0.25);
    text-decoration: none;
}
.btn-gold:hover {
    background-color: #8C5C12;
    border-color: #8C5C12;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(179, 121, 30, 0.35);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: #6D0A1D;
    border: 1px solid #6D0A1D;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 10px 20px;
    transition: all 0.25s ease;
    text-decoration: none;
}
.btn-outline:hover {
    background-color: #6D0A1D;
    color: #FFFFFF !important;
    transform: translateY(-2px);
}

/* Standardized 6-field Result Card in Modal */
.result-card-container {
    margin-top: 24px;
    background: #FAF7F2;
    border: 1px solid rgba(179, 121, 30, 0.3);
    border-radius: 10px;
    padding: 24px;
    display: none;
    box-shadow: inset 0 2px 6px rgba(0,0,0,0.03);
}
.result-card-container.visible {
    display: block;
    animation: sbModalFadeIn 0.3s ease;
}
@keyframes sbModalFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
.result-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
    border-bottom: 1px solid rgba(179, 121, 30, 0.25);
    padding-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}
.result-field-name {
    font-family: 'Cinzel', Georgia, serif;
    font-size: 1.25rem;
    color: #6D0A1D;
    font-weight: 700;
}
.result-score-badge {
    font-size: 0.85rem;
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.score-auspicious {
    background: #E8F5E9;
    color: #1B7340;
    border: 1px solid rgba(27, 115, 64, 0.3);
}
.score-moderate {
    background: #FFF8E1;
    color: #8A6D14;
    border: 1px solid rgba(138, 109, 20, 0.3);
}
.score-inauspicious {
    background: #FFEBEE;
    color: #A31C24;
    border: 1px solid rgba(163, 28, 36, 0.3);
}
.result-schema-item {
    margin-bottom: 12px;
    font-size: 0.92rem;
    line-height: 1.6;
}
.result-schema-label {
    font-weight: 700;
    color: #6D0A1D;
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}
.result-disclaimer-box {
    margin-top: 16px;
    padding: 12px 14px;
    background: #FFFFFF;
    border-left: 3px solid #B3791E;
    font-size: 0.82rem;
    color: #666666;
    border-radius: 0 6px 6px 0;
    font-style: italic;
}
.result-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.visualizer-preview-box {
    margin: 16px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #FFFFFF;
    padding: 16px;
    border-radius: 10px;
    border: 1px solid rgba(179, 121, 30, 0.2);
}


/* ==========================================================================
   MOBILE & TOUCH OPTIMIZATIONS FOR 3D SACRED SKETCHBOOK
   ========================================================================== */
@media (max-width: 900px) {
    .sb-component-wrapper {
        margin: 24px auto 16px;
        padding: 0 10px;
    }

    .sb-stage-frame {
        gap: 8px;
        perspective: none;
        -webkit-perspective: none;
    }

    .sb-book-chassis {
        min-height: auto;
        aspect-ratio: auto;
        height: auto;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 12px 32px rgba(109, 10, 29, 0.12);
    }

    .sb-spread {
        position: relative;
        display: flex;
        flex-direction: column;
        width: 100%;
        height: auto;
    }

    .sb-page-half.left,
    .sb-page-half.right {
        position: relative;
        width: 100% !important;
        height: auto !important;
        left: auto !important;
        right: auto !important;
        top: auto !important;
        bottom: auto !important;
        box-sizing: border-box;
    }

    .sb-page-half.left {
        border-radius: 14px 14px 0 0;
        border-right: none;
        border-bottom: 1px solid rgba(179, 121, 30, 0.25);
        padding: 24px 16px 20px;
        background: #FDFBF7;
    }

    .sb-page-half.right {
        border-radius: 0 0 14px 14px;
        padding: 24px 18px 28px;
        background: #FFFFFF;
    }

    .sb-spine-seam,
    .sb-spine-thread,
    .sb-crease-shadow-left,
    .sb-crease-shadow-right {
        display: none !important;
    }

    .sb-flipping-leaf {
        display: none !important;
    }

    .sb-plate-vector {
        max-width: 220px;
        max-height: 220px;
        margin: 0 auto;
        display: block;
    }

    .sb-arrow-btn {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
        background: rgba(255, 255, 255, 0.95);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .sb-controls-bar {
        margin-top: 16px;
        flex-wrap: wrap;
        gap: 12px;
        justify-content: center;
    }

    .sb-folio-select {
        max-width: 100%;
        width: 100%;
        font-size: 13px;
        padding: 10px 14px;
    }

    .sb-cta-btn {
        width: 100%;
        text-align: center;
        justify-content: center;
        padding: 13px 20px;
        font-size: 14px;
        box-sizing: border-box;
    }
}

@media (max-width: 600px) {
    .sb-plate-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        margin-bottom: 12px;
    }

    .sb-plate-number {
        font-size: 11px;
    }

    .sb-plate-title {
        font-size: 20px;
        line-height: 1.3;
    }

    .sb-plate-subtitle {
        font-size: 13px;
        margin-bottom: 12px;
    }

    .sb-plate-desc {
        font-size: 13.5px;
        line-height: 1.6;
    }

    .sb-plate-attrs {
        gap: 6px;
    }

    .sb-attr-pill {
        font-size: 11px;
        padding: 4px 10px;
    }

    /* Universal Modal Mobile Sizing */
    .modal-window {
        width: 95vw !important;
        max-width: 95vw !important;
        margin: 20px auto !important;
        padding: 20px 16px !important;
        border-radius: 16px !important;
        max-height: 90vh !important;
    }

    .modal-header h3 {
        font-size: 18px !important;
    }

    .modal-form-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }

    .result-card-container {
        padding: 16px !important;
    }

    .result-header-row {
        flex-direction: column;
        gap: 8px;
    }
}