/* PowerPoint Slide Deck Theme System */
:root {
    --bg-dark: #030712;
    --bg-slide: #090d16;
    --bg-glass: rgba(17, 24, 39, 0.65);
    --border-glass: rgba(255, 255, 255, 0.08);
    
    /* Neon Accents */
    --accent-blue: #00bbf9;
    --accent-mint: #00f5d4;
    --accent-purple: #9b5de5;
    
    /* Health Colors */
    --color-green: #39ff14;
    --color-yellow: #ffdd57;
    --color-orange: #ff9f43;
    --color-red: #ff3860;
    
    /* Fonts */
    --font-sans: 'Outfit', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --text-muted: #64748b;
}

/* Reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: #f1f5f9;
    font-family: var(--font-sans);
    overflow: hidden;
    height: 100vh;
    height: 100dvh;
    width: 100vw;
    width: 100dvw;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 1. App Letterbox Frame */
#slideshow-app {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at center, #0e1627 0%, var(--bg-dark) 100%);
}

/* 2. Absolute Centered Slide Container (16:9) */
#slide-container {
    width: 1920px;
    height: 1080px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) scale(1);
    transform-origin: center center;
    background-color: var(--bg-slide);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    box-shadow: 0 45px 120px rgba(0, 0, 0, 0.85);
    overflow: hidden;
}

#slides-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

/* 3. Slide Content Formatting */
.slide {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    padding: 60px 80px;
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.99) translateY(4px);
    transition: opacity 0.4s cubic-bezier(0.25, 1, 0.5, 1), 
                transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.slide.active {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1) translateY(0);
}

.slide-header {
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.slide-header-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.slide-title {
    font-size: 3.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.slide-subtitle {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    color: #64748b;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.slide-number-disp {
    font-family: var(--font-mono);
    font-size: 1.45rem;
    color: var(--accent-blue);
    font-weight: 700;
}

/* Grid columns in slide */
.columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    flex: 1;
    min-height: 0;
}

.column {
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-height: 0;
}

.col-3-2 {
    grid-template-columns: 3fr 2fr;
}

.col-2-3 {
    grid-template-columns: 2fr 3fr;
}

/* Text formatting inside slides */
p {
    font-size: 1.6rem;
    line-height: 1.6;
    color: #94a3b8;
}

strong {
    color: #ffffff;
    font-weight: 600;
}

ul {
    padding-left: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

li {
    font-size: 1.45rem;
    line-height: 1.5;
    color: #94a3b8;
}

li::marker {
    color: var(--accent-mint);
}

.math-block {
    background: rgba(0, 0, 0, 0.25);
    border-left: 4px solid var(--accent-mint);
    padding: 18px 28px;
    border-radius: 0 12px 12px 0;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: #ffffff;
    margin: 8px 0;
    display: flex;
    align-items: center;
}

pre {
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    line-height: 1.5;
    overflow: auto;
    flex: 1;
    color: #cbd5e1;
}

.glass-card {
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.glass-card h3 {
    font-size: 1.35rem;
    color: #ffffff;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 8px;
    margin-bottom: 4px;
}

.glass-card ul li,
.glass-card ol li {
    font-size: inherit;
    line-height: inherit;
}


/* Scientific Table */
table.science-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
}

table.science-table th, table.science-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-glass);
}

table.science-table th {
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 1.1rem;
}

table.science-table td {
    color: #94a3b8;
    font-size: 1.05rem;
}

table.science-table tr:hover td {
    color: #ffffff;
}

/* 4. PowerPoint Hovering HUD Controller */
#presentation-hud {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-glass);
    border-radius: 40px;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 100;
    opacity: 0.2;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

#presentation-hud:hover {
    opacity: 1.0;
    transform: translateY(-2px);
    background: rgba(15, 23, 42, 0.85);
    border-color: rgba(255, 255, 255, 0.15);
}

.hud-icon-btn {
    background: transparent;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s;
}

.hud-icon-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.hud-icon-btn:active {
    transform: scale(0.93);
}

.hud-separator {
    color: rgba(255, 255, 255, 0.15);
    font-size: 1.1rem;
    font-weight: 300;
}

.hud-counter {
    font-family: var(--font-mono);
    color: #f1f5f9;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    min-width: 65px;
    text-align: center;
}

/* 5. Slide List Drawer */
#index-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100%;
    width: 380px;
    background: rgba(8, 12, 22, 0.95);
    backdrop-filter: blur(25px);
    border-left: 1px solid var(--border-glass);
    z-index: 120;
    display: flex;
    flex-direction: column;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#index-drawer.drawer-closed {
    transform: translateX(100%);
}

.drawer-header {
    padding: 30px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.drawer-header h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.drawer-slide-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.drawer-slide-list li {
    padding: 14px 18px;
    border-radius: 8px;
    font-size: 0.95rem;
    color: #94a3b8;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.drawer-slide-list li:hover {
    background: rgba(255, 255, 255, 0.03);
    color: #ffffff;
}

.drawer-slide-list li.active {
    background: rgba(0, 187, 249, 0.08);
    color: #ffffff;
    border-color: rgba(0, 187, 249, 0.2);
}

/* Progress strip fixed at screen top */
#progress-strip-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 90;
    background: rgba(255, 255, 255, 0.02);
}

#progress-strip {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
    box-shadow: 0 0 8px rgba(0, 187, 249, 0.4);
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 6. Interactive Demo Widgets Scaling & Layouts */
.demo-widget {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(5, 7, 12, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 28px;
    box-shadow: inset 0 4px 12px rgba(0, 0, 0, 0.4);
    min-height: 0;
}

.widget-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-mint);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 10px;
}

.widget-body {
    display: flex;
    flex-direction: column;
    gap: 18px;
    flex: 1;
    min-height: 0;
}

.input-row {
    display: flex;
    gap: 16px;
    align-items: center;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.input-group label {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input[type="number"], 
.input-group select {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    color: #ffffff;
    padding: 10px 14px;
    font-family: var(--font-sans);
    font-size: 1.05rem;
    outline: none;
    transition: all 0.2s;
}

.input-group input[type="number"]:focus, 
.input-group select:focus {
    border-color: var(--accent-mint);
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-label-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    color: #64748b;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 16px;
}

.slider-row input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.08);
    height: 4px;
    border-radius: 2px;
    outline: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-mint);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 245, 212, 0.4);
}

.slider-val {
    font-family: var(--font-mono);
    color: #ffffff;
    font-size: 1.05rem;
    min-width: 45px;
    text-align: right;
}

/* Matrix Display */
.matrix-container {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 20px;
    font-family: var(--font-mono);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.matrix-row-disp {
    display: grid;
    grid-template-columns: 35px 1fr 1fr 1fr;
    align-items: center;
    font-size: 1.05rem;
}

.matrix-row-disp .row-lbl {
    color: var(--accent-purple);
    font-weight: 700;
}

.matrix-row-disp span:not(.row-lbl) {
    color: #f1f5f9;
    text-align: right;
    padding-right: 8px;
}

.vol-display {
    border-top: 1px solid var(--border-glass);
    padding-top: 10px;
    font-size: 1.05rem;
    display: flex;
    justify-content: space-between;
}

.vol-val {
    color: var(--accent-mint);
    font-weight: 700;
}

/* 2D Periodic wrap canvas widget */
.canvas-wrapper {
    position: relative;
    aspect-ratio: 1.5;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    overflow: hidden;
}

.canvas-wrapper canvas {
    position: absolute;
    width: 100%;
    height: 100%;
}

.wrap-metric-card {
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 1.05rem;
    display: flex;
    justify-content: space-between;
}

/* Wyckoff results evaluation widget */
.wyckoff-results-list {
    flex: 1;
    overflow-y: auto;
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.2);
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 160px;
}

.wyckoff-item {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
}

.wyckoff-item .coord {
    color: var(--accent-mint);
}

.axis-analysis {
    display: flex;
    gap: 20px;
    justify-content: space-around;
    padding: 10px;
    background: rgba(255, 255, 255, 0.01);
    border-radius: 8px;
}

.axis-pill {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.axis-pill.free {
    background: rgba(57, 255, 20, 0.1);
    color: var(--color-green);
    border: 1px solid rgba(57, 255, 20, 0.2);
}

.axis-pill.fixed {
    background: rgba(255, 56, 96, 0.1);
    color: var(--color-red);
    border: 1px solid rgba(255, 56, 96, 0.2);
}

/* GMM SVG Probability Simulator widget */
.svg-plot-container {
    position: relative;
    height: 180px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    overflow: hidden;
}

.svg-plot-container svg {
    width: 100%;
    height: 100%;
}

.legend-bar {
    display: flex;
    justify-content: space-around;
    padding: 10px;
    background: rgba(255, 255, 255, 0.01);
    border-radius: 8px;
    font-size: 0.9rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

/* Solver Logs trace widget */
.relax-display {
    background: rgba(0,0,0,0.35);
    border-radius: 8px;
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #94a3b8;
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 120px;
    overflow-y: auto;
}

.relax-log-entry {
    border-left: 2px solid var(--accent-purple);
    padding-left: 10px;
}

.relax-log-entry.header {
    border-color: var(--accent-mint);
    color: #ffffff;
    font-weight: bold;
}

/* Hidden elements */
.hidden {
    display: none !important;
}

/* Slide 9 Failsafe Ribbon styling */
.failsafe-ribbon {
    margin-top: 20px;
    padding: 14px 20px;
    background: rgba(255, 56, 96, 0.08);
    border-left: 4px solid var(--color-red);
    border-radius: 0 8px 8px 0;
    font-size: 1.1rem;
    line-height: 1.4;
    color: #cbd5e1;
}

/* Scrollbar styles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* --- Migrated Widget Styles --- */

:root {
    --c-nonmetal: #22d3ee;
    --c-noble-gas: #c084fc;
    --c-alkali-metal: #f43f5e;
    --c-alkaline-earth: #fb923c;
    --c-metalloid: #2dd4bf;
    --c-halogen: #818cf8;
    --c-transition: #facc15;
    --c-post-transition: #34d399;
    --c-lanthanide: #f472b6;
    --c-actinide: #e879f9;
}

/* Periodic Table Grid */
.periodic-table-container {
    width: 100%;
    overflow-x: auto;
    padding: 2px;
}
.periodic-table {
    display: grid;
    grid-template-columns: repeat(18, minmax(26px, 1fr));
    grid-template-rows: repeat(10, minmax(26px, 1fr));
    gap: 3px;
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
}
.element-card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-glass);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2px;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    aspect-ratio: 1;
}
.element-card:hover {
    transform: scale(1.12);
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    border-color: rgba(255,255,255,0.25);
}
.element-card .atomic-number {
    position: absolute;
    top: 1px;
    left: 2px;
    font-size: 0.55rem;
    font-family: var(--font-mono);
    color: #64748b;
}
.element-card .symbol {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    margin-top: 1px;
}
.element-card .name {
    font-size: 0.45rem;
    color: #94a3b8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}
.element-card .mass {
    font-size: 0.45rem;
    font-family: var(--font-mono);
    color: #475569;
    margin-top: 1px;
}

/* Spacer elements */
.element-card.lanthanide-spacer,
.element-card.actinide-spacer {
    cursor: default;
    border-style: dashed;
    opacity: 0.6;
}
.element-card.lanthanide-spacer:hover,
.element-card.actinide-spacer:hover {
    transform: none;
    box-shadow: none;
}

/* CPK glows & border styles */
.element-card.nonmetal { border-color: rgba(34, 211, 238, 0.3); }
.element-card.noble-gas { border-color: rgba(192, 132, 252, 0.3); }
.element-card.alkali-metal { border-color: rgba(244, 63, 94, 0.3); }
.element-card.alkaline-earth { border-color: rgba(251, 146, 60, 0.3); }
.element-card.metalloid { border-color: rgba(45, 212, 191, 0.3); }
.element-card.halogen { border-color: rgba(129, 140, 248, 0.3); }
.element-card.transition { border-color: rgba(250, 204, 21, 0.3); }
.element-card.post-transition { border-color: rgba(52, 211, 153, 0.3); }
.element-card.lanthanide { border-color: rgba(244, 114, 182, 0.3); }
.element-card.actinide { border-color: rgba(232, 121, 249, 0.3); }

/* Highlight states */
.element-card.selected-a {
    background: rgba(155, 93, 229, 0.25) !important;
    border: 2px solid var(--accent-purple) !important;
    box-shadow: 0 0 10px rgba(155, 93, 229, 0.5);
    transform: scale(1.05);
}
.element-card.selected-b {
    background: rgba(0, 187, 249, 0.25) !important;
    border: 2px solid var(--accent-blue) !important;
    box-shadow: 0 0 10px rgba(0, 187, 249, 0.5);
    transform: scale(1.05);
}
.element-card.selected-both {
    background: linear-gradient(135deg, rgba(155, 93, 229, 0.2), rgba(0, 187, 249, 0.2)) !important;
    border: 2px dashed var(--accent-mint) !important;
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.5);
    transform: scale(1.05);
}
.element-card.inactive-element {
    opacity: 0.2;
    pointer-events: none;
}

/* Atom selection display cards */
.atom-select-card {
    flex: 1;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    padding: 8px 12px;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 100px;
}
.atom-select-card.empty {
    border-color: var(--border-glass) !important;
    opacity: 0.6;
}
.atom-select-card .label {
    font-size: 0.65rem;
    color: #64748b;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.atom-select-card .symbol {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    font-family: var(--font-mono);
}
.atom-select-card .name {
    font-size: 0.7rem;
    color: #94a3b8;
}

/* Crystal Builder style updates */
.cb-tab-btn {
    transition: all 0.2s ease;
}
.cb-tab-btn:hover {
    color: #cbd5e1 !important;
    background: rgba(255,255,255,0.02);
}
.cb-tab-btn.active {
    color: var(--accent-mint) !important;
    background: rgba(0, 245, 212, 0.05) !important;
    border-bottom: 2px solid var(--accent-mint) !important;
}
.cb-bg-btn {
    transition: all 0.2s ease;
}
.cb-bg-btn.active {
    border-color: var(--accent-mint) !important;
    background: rgba(0, 245, 212, 0.08) !important;
}

/* Add spinning animation for widget load screen */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
}

/* --- Premium Slide 3 and 4 Enhancements --- */

/* Slide 3: Periodic Table Hover Glows */
.element-card {
    transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
.element-card:hover {
    transform: scale(1.15) !important;
    z-index: 10 !important;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5) !important;
}
.element-card.nonmetal:hover { border-color: var(--c-nonmetal) !important; box-shadow: 0 0 12px rgba(34, 211, 238, 0.5) !important; }
.element-card.noble-gas:hover { border-color: var(--c-noble-gas) !important; box-shadow: 0 0 12px rgba(192, 132, 252, 0.5) !important; }
.element-card.alkali-metal:hover { border-color: var(--c-alkali-metal) !important; box-shadow: 0 0 12px rgba(244, 63, 94, 0.5) !important; }
.element-card.alkaline-earth:hover { border-color: var(--c-alkaline-earth) !important; box-shadow: 0 0 12px rgba(251, 146, 60, 0.5) !important; }
.element-card.metalloid:hover { border-color: var(--c-metalloid) !important; box-shadow: 0 0 12px rgba(45, 212, 191, 0.5) !important; }
.element-card.halogen:hover { border-color: var(--c-halogen) !important; box-shadow: 0 0 12px rgba(129, 140, 248, 0.5) !important; }
.element-card.transition:hover { border-color: var(--c-transition) !important; box-shadow: 0 0 12px rgba(250, 204, 21, 0.5) !important; }
.element-card.post-transition:hover { border-color: var(--c-post-transition) !important; box-shadow: 0 0 12px rgba(52, 211, 153, 0.5) !important; }
.element-card.lanthanide:hover { border-color: var(--c-lanthanide) !important; box-shadow: 0 0 12px rgba(244, 114, 182, 0.5) !important; }
.element-card.actinide:hover { border-color: var(--c-actinide) !important; box-shadow: 0 0 12px rgba(232, 121, 249, 0.5) !important; }

/* Pulsing Active Borders on Periodic Table */
@keyframes borderPulsePurple {
    0%, 100% { box-shadow: 0 0 6px rgba(155, 93, 229, 0.3); border-color: rgba(155, 93, 229, 0.7) !important; }
    50% { box-shadow: 0 0 14px rgba(155, 93, 229, 0.7); border-color: rgba(155, 93, 229, 1) !important; }
}
@keyframes borderPulseBlue {
    0%, 100% { box-shadow: 0 0 6px rgba(0, 187, 249, 0.3); border-color: rgba(0, 187, 249, 0.7) !important; }
    50% { box-shadow: 0 0 14px rgba(0, 187, 249, 0.7); border-color: rgba(0, 187, 249, 1) !important; }
}
@keyframes borderPulseMint {
    0%, 100% { box-shadow: 0 0 6px rgba(0, 245, 212, 0.3); border-color: rgba(0, 245, 212, 0.7) !important; }
    50% { box-shadow: 0 0 14px rgba(0, 245, 212, 0.7); border-color: rgba(0, 245, 212, 1) !important; }
}

.element-card.selected-a {
    animation: borderPulsePurple 2s infinite ease-in-out;
    transform: scale(1.05) !important;
}
.element-card.selected-b {
    animation: borderPulseBlue 2s infinite ease-in-out;
    transform: scale(1.05) !important;
}
.element-card.selected-both {
    animation: borderPulseMint 2s infinite ease-in-out;
    transform: scale(1.05) !important;
}

/* Atom Selection Cards */
.atom-select-card {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
.atom-select-card:not(.empty) {
    background: rgba(15, 23, 42, 0.8) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.atom-select-card.empty {
    border-color: var(--border-glass) !important;
    opacity: 0.5;
    background: rgba(15, 23, 42, 0.25) !important;
}

/* Slide 3 Buttons and Quick Pairs */
.id-btn-quick {
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
.id-btn-quick:hover {
    background: rgba(0, 187, 249, 0.08) !important;
    border-color: rgba(0, 187, 249, 0.4) !important;
    color: #ffffff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 187, 249, 0.2) !important;
}
.id-btn-quick:active {
    transform: translateY(0) scale(0.97) !important;
}

#id-btn-swap, #id-btn-clear {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#id-btn-swap:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(255, 255, 255, 0.25) !important;
    transform: scale(1.08) !important;
}
#id-btn-swap:active {
    transform: scale(0.95) !important;
}
#id-btn-clear:hover {
    background: rgba(255, 56, 96, 0.15) !important;
    border-color: var(--color-red) !important;
    transform: scale(1.08) !important;
}
#id-btn-clear:active {
    transform: scale(0.95) !important;
}

/* Slide 4 control tabs active transitions */
.cb-tab-btn {
    transition: all 0.22s ease !important;
    border-bottom: 2px solid transparent !important;
}
.cb-tab-btn:hover {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.02) !important;
}
.cb-tab-btn.active {
    color: var(--accent-mint) !important;
    background: rgba(0, 245, 212, 0.04) !important;
    border-bottom: 2px solid var(--accent-mint) !important;
    text-shadow: 0 0 8px rgba(0, 245, 212, 0.3);
}

/* Sleek custom slider styling for Crystal Builder range inputs */
#widget-crystal-builder input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    background: rgba(255, 255, 255, 0.08) !important;
    height: 4px;
    border-radius: 2px;
    outline: none;
    transition: background 0.3s;
}
#widget-crystal-builder input[type="range"]:hover {
    background: rgba(255, 255, 255, 0.12) !important;
}
#widget-crystal-builder input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--accent-mint);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 245, 212, 0.5);
    transition: transform 0.15s, background-color 0.15s;
}
#widget-crystal-builder input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.3);
    background: #ffffff;
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.8);
}

/* Sleek input & select fields inside Slide 4 */
#widget-crystal-builder select,
#widget-crystal-builder input[type="number"],
#widget-crystal-builder input[type="text"] {
    background: rgba(15, 23, 42, 0.85) !important;
    border: 1px solid var(--border-glass) !important;
    border-radius: 4px;
    color: #ffffff !important;
    font-family: var(--font-sans);
    outline: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#widget-crystal-builder select:hover,
#widget-crystal-builder input[type="number"]:hover,
#widget-crystal-builder input[type="text"]:hover {
    border-color: rgba(255, 255, 255, 0.15) !important;
}
#widget-crystal-builder select:focus,
#widget-crystal-builder input[type="number"]:focus,
#widget-crystal-builder input[type="text"]:focus {
    border-color: var(--accent-mint) !important;
    box-shadow: 0 0 8px rgba(0, 245, 212, 0.25) !important;
    background: rgba(15, 23, 42, 0.95) !important;
}

/* Recenter / Screenshot Viewport Overlay Buttons */
#cb-viewer-container button {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cb-viewer-container button:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4) !important;
}
#cb-viewer-container button:active {
    transform: translateY(0) scale(0.97) !important;
}

#cb-btn-recenter:hover {
    background: rgba(15, 23, 42, 0.95) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    color: #fff !important;
}
#cb-btn-snap:hover {
    background: #00bbf9 !important;
    box-shadow: 0 0 12px rgba(0, 187, 249, 0.5) !important;
}

/* Tooltip and HUD customization */
#cb-atom-tooltip {
    border-color: var(--accent-mint) !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), 0 0 8px rgba(0, 245, 212, 0.2) !important;
}

/* Manage Tab added atoms rows styling and delete triggers */
#cb-atoms-list > div {
    transition: all 0.2s ease !important;
}
#cb-atoms-list > div:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(0, 245, 212, 0.3) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2) !important;
}
#cb-atoms-list > div button {
    transition: all 0.15s ease !important;
}
#cb-atoms-list > div button:hover {
    color: #ff3860 !important;
    transform: scale(1.3) !important;
    text-shadow: 0 0 6px rgba(255, 56, 96, 0.6) !important;
}

#cb-btn-export-cif {
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cb-btn-export-cif:hover {
    background: rgba(0, 245, 212, 0.2) !important;
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.4) !important;
    color: #fff !important;
    transform: scale(1.02) !important;
}
#cb-btn-export-cif:active {
    transform: scale(0.98) !important;
}

#cb-btn-add-atom {
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cb-btn-add-atom:hover {
    background: #00ffaa !important;
    box-shadow: 0 0 12px rgba(0, 245, 212, 0.6) !important;
    transform: scale(1.02) !important;
}
#cb-btn-add-atom:active {
    transform: scale(0.98) !important;
}

#cb-tab-manage #cb-btn-clear {
    transition: all 0.2s ease !important;
}
#cb-tab-manage #cb-btn-clear:hover {
    background: rgba(255, 56, 96, 0.25) !important;
    box-shadow: 0 0 8px rgba(255, 56, 96, 0.4) !important;
    color: #ffffff !important;
}

/* --- Slide 9: Bond Scoring Visualizer Aesthetics --- */
.cs-tab-btn {
    transition: all 0.22s ease !important;
    border-bottom: 2px solid transparent !important;
}
.cs-tab-btn:hover {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.02) !important;
}
.cs-tab-btn.active {
    color: var(--accent-mint) !important;
    background: rgba(0, 245, 212, 0.04) !important;
    border-bottom: 2px solid var(--accent-mint) !important;
    text-shadow: 0 0 8px rgba(0, 245, 212, 0.3);
}

.cs-bg-btn {
    transition: all 0.2s ease;
}
.cs-bg-btn.active {
    border-color: var(--accent-mint) !important;
    background: rgba(0, 245, 212, 0.08) !important;
}

#widget-crystal-scoring input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    background: rgba(255, 255, 255, 0.08) !important;
    height: 4px;
    border-radius: 2px;
    outline: none;
    transition: background 0.3s;
}
#widget-crystal-scoring input[type="range"]:hover {
    background: rgba(255, 255, 255, 0.12) !important;
}
#widget-crystal-scoring input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--accent-mint);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 245, 212, 0.5);
    transition: transform 0.15s, background-color 0.15s;
}
#widget-crystal-scoring input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.3);
    background: #ffffff;
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.8);
}

#widget-crystal-scoring select,
#widget-crystal-scoring input[type="number"],
#widget-crystal-scoring input[type="text"] {
    background: rgba(15, 23, 42, 0.85) !important;
    border: 1px solid var(--border-glass) !important;
    border-radius: 4px;
    color: #ffffff !important;
    font-family: var(--font-sans);
    outline: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#widget-crystal-scoring select:hover,
#widget-crystal-scoring input[type="number"]:hover,
#widget-crystal-scoring input[type="text"]:hover {
    border-color: rgba(255, 255, 255, 0.15) !important;
}
#widget-crystal-scoring select:focus,
#widget-crystal-scoring input[type="number"]:focus,
#widget-crystal-scoring input[type="text"]:focus {
    border-color: var(--accent-mint) !important;
    box-shadow: 0 0 8px rgba(0, 245, 212, 0.25) !important;
    background: rgba(15, 23, 42, 0.95) !important;
}

#cs-viewer-container button {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cs-viewer-container button:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4) !important;
}
#cs-viewer-container button:active {
    transform: translateY(0) scale(0.97) !important;
}

#cs-btn-recenter:hover {
    background: rgba(15, 23, 42, 0.95) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    color: #fff !important;
}
#cs-btn-snap:hover {
    background: #00bbf9 !important;
    box-shadow: 0 0 12px rgba(0, 187, 249, 0.5) !important;
}

#cs-atom-tooltip {
    border-color: var(--accent-mint) !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), 0 0 8px rgba(0, 245, 212, 0.2) !important;
}

#cs-atoms-list > div {
    transition: all 0.2s ease !important;
}
#cs-atoms-list > div:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(0, 245, 212, 0.3) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2) !important;
}
#cs-atoms-list > div button {
    transition: all 0.15s ease !important;
}
#cs-atoms-list > div button:hover {
    color: #ff3860 !important;
    transform: scale(1.3) !important;
    text-shadow: 0 0 6px rgba(255, 56, 96, 0.6) !important;
}

#cs-btn-export-cif {
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cs-btn-export-cif:hover {
    background: rgba(0, 245, 212, 0.2) !important;
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.4) !important;
    color: #fff !important;
    transform: scale(1.02) !important;
}
#cs-btn-export-cif:active {
    transform: scale(0.98) !important;
}

#cs-btn-add-atom {
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
#cs-btn-add-atom:hover {
    background: #00ffaa !important;
    box-shadow: 0 0 12px rgba(0, 245, 212, 0.6) !important;
    transform: scale(1.02) !important;
}
#cs-btn-add-atom:active {
    transform: scale(0.98) !important;
}

#cs-btn-clear {
    transition: all 0.2s ease !important;
}
#cs-btn-clear:hover {
    background: rgba(255, 56, 96, 0.25) !important;
    box-shadow: 0 0 8px rgba(255, 56, 96, 0.4) !important;
    color: #ffffff !important;
}


/* --- Slide 2: Pillar Card hover lift --- */
.pillar-card {
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.pillar-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ============================================================
   RESPONSIVE OVERRIDES & MOBILE ORIENTATION WARNING
   ============================================================ */
#slideshow-app.pseudo-fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    width: 100dvw !important;
    height: 100vh !important;
    height: 100dvh !important;
    z-index: 999999 !important;
    background: #030712 !important;
}

#portrait-warning {
    display: none;
    position: fixed;
    inset: 0;
    background: #060913;
    z-index: 999999;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 30px;
}

@media (max-width: 900px) and (orientation: portrait) {
    #portrait-warning {
        display: none !important;
    }
}

.warning-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    max-width: 320px;
}

.warning-icon {
    font-size: 3.5rem;
    animation: rotatePhone 2s ease-in-out infinite;
}

.warning-content h3 {
    font-size: 1.5rem;
    color: var(--accent-blue);
    font-weight: 700;
}

.warning-content p {
    font-size: 0.95rem;
    color: #94a3b8;
    line-height: 1.6;
}

@keyframes rotatePhone {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(-90deg); }
}

@media (max-width: 900px) {
    #presentation-hud {
        bottom: 12px;
        right: 12px;
        padding: 6px 16px;
        gap: 10px;
        opacity: 0.95 !important;
    }
    .hud-icon-btn {
        width: 32px;
        height: 32px;
    }
    .hud-counter {
        font-size: 0.85rem;
        min-width: 50px;
    }
    #index-drawer {
        width: 280px;
    }
}