/* ═══════════════════════════════════════════════════════════════════════════
   TRANSFORMER TAB STYLES - DARK LUXE EDITION
   Orange accent theme (#ff7a45)
   ═══════════════════════════════════════════════════════════════════════════ */

/* Transformer-specific accent color override */
#transformer-panel {
    --accent: var(--accent-transformer);
    --accent-glow: var(--accent-transformer-glow);
    --accent-soft: var(--accent-transformer-soft);
}

/* ============================================
   TRANSFORMER PANEL LAYOUT
   ============================================ */

.transformer-panel {
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: 16px;
    padding: 16px;
    height: 100%;
    min-height: 0;
}

/* ============================================
   TRANSFORMER SIDEBAR (LEFT)
   ============================================ */

.transformer-sidebar {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.transformer-sidebar__header {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
}

.transformer-sidebar__title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.transformer-sidebar__content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-soft) transparent;
}

.transformer-sidebar__content::-webkit-scrollbar {
    width: 6px;
}

.transformer-sidebar__content::-webkit-scrollbar-track {
    background: transparent;
}

.transformer-sidebar__content::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 3px;
}

.transformer-sidebar__content::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Loading Progress */
#transformer-loading-progress {
    margin-bottom: 16px;
}

.loading-status {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

/* Model Info */
.transformer-model-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.model-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.model-info-item:hover {
    border-color: var(--accent-soft);
    box-shadow: 0 0 15px var(--accent-glow);
}

.model-info-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.model-info-value {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    font-family: var(--font-mono);
}

/* Mini Architecture Diagram */
.transformer-architecture-mini {
    margin-top: 20px;
}

.transformer-architecture-mini h3 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.arch-block {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.arch-block:hover {
    transform: translateY(-2px);
}

.arch-block--embed {
    background: linear-gradient(135deg, #a855f7 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

.arch-block--attention {
    background: linear-gradient(135deg, var(--accent) 0%, #f97316 100%);
    color: #0a0d17;
    box-shadow: 0 0 20px var(--accent-glow);
    font-weight: 600;
}

.arch-block--ffn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.arch-block--output {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.arch-connector {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-tertiary);
    padding: 6px 0;
}

/* ============================================
   TRANSFORMER VISUALIZATION (CENTER)
   ============================================ */

.transformer-visualization {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-soft) transparent;
}

.transformer-visualization::-webkit-scrollbar {
    width: 6px;
}

.transformer-visualization::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 3px;
}

.transformer-visualization::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Text Input/Output Panel */
.transformer-io-panel {
    flex: 0 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.transformer-io {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
}

.transformer-input-container,
.transformer-output-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.transformer-input-container label,
.transformer-output-container label {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.transformer-input {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-void);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-mono);
    resize: vertical;
    min-height: 60px;
    transition: all 0.2s ease;
}

.transformer-input:hover {
    border-color: var(--accent-soft);
}

.transformer-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.transformer-output {
    min-height: 100px;
    padding: 14px;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.transformer-output__placeholder {
    color: var(--text-tertiary);
    font-style: italic;
}

.transformer-output .token {
    display: inline;
    padding: 3px 6px;
    border-radius: 4px;
    margin: 2px;
}

.transformer-output .token--prompt {
    background: rgba(168, 85, 247, 0.2);
    color: #c4b5fd;
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.transformer-output .token--generated {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.transformer-output .token--current {
    background: rgba(255, 122, 69, 0.3);
    border: 1px solid var(--accent);
    animation: tokenPulse 0.5s ease-in-out infinite;
}

@keyframes tokenPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 10px var(--accent-glow); }
    50% { opacity: 0.7; box-shadow: 0 0 20px var(--accent-glow); }
}

/* Architecture Canvas Panel */
.transformer-arch-panel {
    flex: 1;
    min-height: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.transformer-arch-panel .viz-panel__body {
    height: 100%;
    background: var(--bg-void);
}

#transformer-arch-canvas {
    width: 100%;
    height: 100%;
}

/* ============================================
   ATTENTION SIDEBAR (RIGHT)
   ============================================ */

.transformer-attention {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.transformer-attention__header {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
}

.transformer-attention__title {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.transformer-attention__content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.attention-controls {
    display: flex;
    gap: 12px;
}

.attention-select {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.attention-select label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.attention-select select {
    padding: 8px 10px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-void);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s ease;
}

.attention-select select:hover {
    border-color: var(--accent-soft);
}

.attention-select select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

#transformer-attention-canvas {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
}

.attention-tokens {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.attention-hint {
    font-style: italic;
    color: var(--text-tertiary);
}

/* ============================================
   TRANSFORMER EXPLAINER MODAL - DARK LUXE
   ============================================ */

#transformer-explainer-modal .explainer-modal__content {
    max-width: 950px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    box-shadow: 0 0 60px var(--accent-glow),
                0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Tokenizer Demo */
.tokenizer-demo {
    margin-top: 20px;
}

.tokenizer-input {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-void);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-mono);
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.tokenizer-input::placeholder {
    color: var(--text-tertiary);
}

.tokenizer-input:hover {
    border-color: var(--accent-soft);
}

.tokenizer-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.tokenizer-output {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
    min-height: 50px;
    padding: 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.tokenizer-output .token {
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.tokenizer-output .token:hover {
    transform: translateY(-2px);
}

/* Token color palette for dark theme */
.tokenizer-output .token:nth-child(6n+1) {
    background: rgba(96, 165, 250, 0.2);
    color: #93c5fd;
    border-color: rgba(96, 165, 250, 0.3);
}
.tokenizer-output .token:nth-child(6n+2) {
    background: rgba(52, 211, 153, 0.2);
    color: #6ee7b7;
    border-color: rgba(52, 211, 153, 0.3);
}
.tokenizer-output .token:nth-child(6n+3) {
    background: rgba(251, 191, 36, 0.2);
    color: #fcd34d;
    border-color: rgba(251, 191, 36, 0.3);
}
.tokenizer-output .token:nth-child(6n+4) {
    background: rgba(244, 114, 182, 0.2);
    color: #f9a8d4;
    border-color: rgba(244, 114, 182, 0.3);
}
.tokenizer-output .token:nth-child(6n+5) {
    background: rgba(168, 85, 247, 0.2);
    color: #c4b5fd;
    border-color: rgba(168, 85, 247, 0.3);
}
.tokenizer-output .token:nth-child(6n+6) {
    background: rgba(45, 212, 191, 0.2);
    color: #5eead4;
    border-color: rgba(45, 212, 191, 0.3);
}

.tokenizer-ids {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-tertiary);
    padding: 10px 12px;
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

/* Embeddings Grid */
.explainer-grid--embeddings {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.embedding-plus,
.embedding-equals {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent);
    text-shadow: 0 0 20px var(--accent-glow);
}

/* Attention Demo */
.attention-demo {
    margin-top: 20px;
}

.attention-qkv {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.qkv-column {
    text-align: center;
}

.qkv-column h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.qkv-column p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.qkv-column canvas {
    border-radius: var(--radius-md);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
}

.qkv-multiply,
.qkv-equals {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    text-shadow: 0 0 15px var(--accent-glow);
}

.attention-formula {
    text-align: center;
    padding: 20px;
    background: var(--bg-surface);
    border: 1px solid var(--accent-soft);
    border-radius: var(--radius-lg);
    box-shadow: 0 0 30px var(--accent-glow);
}

.formula {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--text-primary);
}

/* Multi-Head Demo */
.multihead-demo {
    margin: 24px 0;
    text-align: center;
}

.multihead-demo canvas {
    border-radius: var(--radius-md);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
}

.multihead-info {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.head-example {
    padding: 10px 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.head-example:hover {
    border-color: var(--accent-soft);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Generation Demo */
.generation-demo {
    margin: 24px 0;
}

.generation-step {
    min-height: 100px;
    padding: 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1.6;
}

.generation-controls {
    display: flex;
    gap: 14px;
    justify-content: center;
}

.generation-sampling {
    margin-top: 28px;
}

.generation-sampling h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sampling-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.sampling-option {
    padding: 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.sampling-option:hover {
    border-color: var(--accent-soft);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Explainer List */
.explainer-list {
    list-style: none;
    padding: 0;
    margin: 14px 0;
}

.explainer-list li {
    padding: 10px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.explainer-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Full Width Card */
.explainer-card--full {
    grid-column: 1 / -1;
}

/* Transformer Diagram in Overview */
.transformer-diagram {
    margin-top: 24px;
    text-align: center;
}

.transformer-diagram canvas {
    border-radius: var(--radius-md);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 1200px) {
    .transformer-panel {
        grid-template-columns: 240px 1fr 280px;
    }
}

@media (max-width: 900px) {
    .transformer-panel {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }

    .transformer-sidebar,
    .transformer-attention {
        max-height: 220px;
    }

    .attention-qkv {
        flex-direction: column;
    }

    .sampling-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .transformer-panel {
        padding: 10px;
        gap: 10px;
    }

    .transformer-io {
        padding: 14px;
    }

    .transformer-input,
    .transformer-output {
        font-size: 0.85rem;
        padding: 12px;
    }
}