/**
 * Cryptography Course - Specific Styles
 *
 * This file contains only styles unique to the cryptography course:
 * - Code editor system (lang tabs, syntax highlighting)
 * - Interactive widgets (bit flipper, hash, shift, etc.)
 * - SHA/AES diagrams and split layouts
 * - Operator/notation tables
 *
 * Shared styles come from /css/course-template.css
 */

/* =====================================================
   VARIABLE OVERRIDES (if needed)
   ===================================================== */
:root {
    /* Cryptography uses green accent (same as template default) */
    --accent-green: var(--course-accent);
    --accent-cyan: var(--course-accent-secondary);

    /* Syntax highlighting */
    --syntax-keyword: #ff7b9c;
    --syntax-string: #98d8a0;
    --syntax-function: #7dd3fc;
    --syntax-comment: #6a6a7a;
    --syntax-number: #fbbf24;

    /* Widget content width */
    --content-width: var(--content-max-width);
}

/* =====================================================
   LANG TABS (code language switcher)
   ===================================================== */
.lang-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--course-border);
    margin-top: 1rem;
}

.lang-tab {
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: none;
    color: var(--course-text-secondary);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.15s;
}

.lang-tab:hover {
    color: var(--course-text-primary);
}

.lang-tab.active {
    color: var(--course-text-primary);
    border-bottom-color: var(--course-accent);
}

.lang-tab[data-lang="javascript"].active { border-bottom-color: #f7df1e; }
.lang-tab[data-lang="python"].active { border-bottom-color: #3776ab; }
.lang-tab[data-lang="go"].active { border-bottom-color: #00add8; }
.lang-tab[data-lang="rust"].active { border-bottom-color: #dea584; }

.code-panel { display: none; }
.code-panel.active { display: block; }

/* =====================================================
   CODE EDITOR SYSTEM
   ===================================================== */
.code-container {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-top: none;
    border-radius: 0 0 6px 6px;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--course-border);
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.static-label {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.65rem;
}

.run-btn {
    background: var(--course-accent);
    color: var(--course-bg-primary);
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
}

.run-btn:hover { filter: brightness(1.1); }

.code-wrapper {
    position: relative;
    height: 500px;
}

.code-gutter {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 36px;
    background: var(--course-bg-secondary);
    border-right: 1px solid var(--course-border);
    overflow: auto;
    overflow-x: hidden;
    z-index: 5;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.code-gutter::-webkit-scrollbar { display: none; }

.code-gutter-inner {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.gutter-line {
    height: 1.6em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gutter-num {
    color: var(--course-text-secondary);
    opacity: 0.5;
    font-size: 0.75rem;
    user-select: none;
}

.gutter-info-btn {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--course-text-secondary);
    color: var(--course-text-secondary);
    font-size: 0.6rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
}

.gutter-info-btn.unviewed {
    border: 2px solid #ffd700;
    color: #1a1a2e;
    background: linear-gradient(135deg, #ffd700 0%, #ffec8b 50%, #ffd700 100%);
    opacity: 1;
    font-weight: 700;
    box-shadow: 0 0 6px rgba(255, 215, 0, 0.6);
}

.gutter-info-btn:hover {
    background: #fff;
    color: #1a1a2e;
    border-color: #fff;
    opacity: 1;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.code-info-tooltip {
    display: none;
    position: fixed;
    background: var(--course-bg-primary);
    border: 1px solid var(--course-accent-secondary);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    width: 300px;
    max-width: 90vw;
    font-size: 0.8rem;
    color: var(--course-text-secondary);
    line-height: 1.5;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

.code-info-tooltip.active {
    display: block;
    animation: tooltipFadeIn 0.15s ease;
}

@keyframes tooltipFadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.code-info-tooltip strong {
    color: var(--course-accent-secondary);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.code-info-tooltip p { margin: 0.4rem 0 0 0; }

.code-info-tooltip code {
    background: rgba(0, 255, 65, 0.1);
    padding: 0.1rem 0.25rem;
    border-radius: 3px;
}

.code-highlight {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    padding: 1rem;
    padding-left: calc(36px + 1rem);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    white-space: pre;
    overflow: auto;
    pointer-events: none;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.code-highlight::-webkit-scrollbar { display: none; }

.code-editor {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: transparent;
    caret-color: var(--course-text-primary);
    background: transparent;
    border: none;
    margin: 0;
    padding: 1rem;
    padding-left: calc(36px + 1rem);
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    resize: none;
    outline: none;
    z-index: 1;
    white-space: pre;
    overflow: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.code-editor::-webkit-scrollbar { display: none; }

.code-static {
    padding: 1rem;
    padding-left: calc(36px + 1rem);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    white-space: pre;
    overflow: auto;
    height: 500px;
    margin: 0;
}

/* Output */
.output-container { border-top: 1px solid var(--course-border); }

.output-header {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--course-border);
}

.output {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--course-accent);
    min-height: 80px;
    white-space: pre-wrap;
}

.output-line {
    padding: 1px 4px;
    margin: 0 -4px;
    border-radius: 3px;
    transition: background 0.15s;
}

.output-line.highlighted {
    background: rgba(0, 255, 65, 0.15);
}

/* Expandable output */
.expandable {
    cursor: pointer;
    background: rgba(0, 255, 65, 0.05);
    border-bottom: 1px dashed rgba(0, 255, 65, 0.3);
    padding: 0 2px;
    border-radius: 2px;
}

.expandable:hover {
    background: rgba(0, 255, 65, 0.12);
    border-bottom: 1px solid var(--course-accent);
}

.expandable .arrow {
    display: inline-block;
    transition: transform 0.15s;
    margin-right: 4px;
    font-size: 0.7em;
}

.expandable.expanded .arrow { transform: rotate(90deg); }
.expandable .preview { color: var(--course-text-secondary); }

.expanded-content {
    display: none;
    margin-left: 1.5em;
    color: var(--course-text-secondary);
    font-size: 0.9em;
}

.expandable.expanded + .expanded-content { display: block; }

/* Syntax highlighting */
.syntax-keyword { color: var(--syntax-keyword); }
.syntax-string { color: var(--syntax-string); }
.syntax-function { color: var(--syntax-function); }
.syntax-comment { color: var(--syntax-comment); font-style: italic; }
.syntax-number { color: var(--syntax-number); }

/* =====================================================
   ECB PENGUIN DEMO
   ===================================================== */
.ecb-penguin-demo {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: flex-end;
    margin: 1.5rem 0 0.5rem;
    max-width: var(--content-width);
}

.ecb-image {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.ecb-image img {
    max-height: 180px;
    width: auto;
    border-radius: 4px;
    background: #444;
}

.ecb-image span {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
}

.ecb-caption {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
    text-align: center;
    max-width: var(--content-width);
    margin-bottom: 1.5rem;
}

/* =====================================================
   TIMELINE
   ===================================================== */
.timeline {
    max-width: var(--content-width);
    margin: 1rem 0;
}

.timeline-item {
    position: relative;
    padding: 0.75rem 0 0.75rem 1.25rem;
    border-left: 2px solid var(--course-border);
    margin-left: 0.5rem;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 1rem;
    width: 8px;
    height: 8px;
    background: var(--course-accent);
    border-radius: 50%;
}

.timeline-item strong { color: var(--course-accent-secondary); }
.timeline-item:last-child { border-left-color: transparent; }

/* =====================================================
   OPERATOR & NOTATION TABLES
   ===================================================== */
.operator-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.operator-table th,
.operator-table td {
    padding: 0.6rem 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--course-border);
}

.operator-table th {
    color: var(--course-text-secondary);
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.operator-table td:first-child {
    font-weight: 600;
    color: var(--course-accent);
}

.operator-table code {
    background: var(--course-bg-code);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}

.operator-table .math-symbol {
    color: var(--course-text-secondary);
    margin-left: 0.5rem;
}

.notation-table {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1.5rem;
}

.notation-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 0.75rem;
}

.notation-grid {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 0.5rem 1.5rem;
    font-size: 0.85rem;
}

.notation-header {
    color: var(--course-text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--course-border);
}

.notation-cell {
    color: var(--course-text-primary);
    padding: 0.25rem 0;
}

.notation-symbol {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    color: var(--course-accent);
}

/* =====================================================
   BIT FLIPPER WIDGET
   ===================================================== */
.bit-flipper {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.bit-flipper-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--course-accent);
}

.bit-flipper-bits {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.bit-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.bit-weight {
    font-size: 0.7rem;
    color: var(--course-text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.bit-weight.sign-bit { color: #ff7b9c; }

.bit-toggle {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.2rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    border: 2px solid var(--course-border);
    border-radius: 6px;
    background: var(--course-bg-secondary);
    color: var(--course-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.bit-toggle:hover { border-color: var(--course-accent-secondary); }

.bit-toggle.on {
    background: var(--course-accent);
    color: #000;
    border-color: var(--course-accent);
}

.bit-column[data-bit="7"] .bit-toggle.on {
    background: #ff7b9c;
    border-color: #ff7b9c;
}

.bit-label {
    font-size: 0.65rem;
    color: var(--course-text-secondary);
    opacity: 0.6;
}

.bit-flipper-values {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 0.75rem;
}

.bit-value {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.bit-value-label {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
}

.bit-value-num {
    font-size: 1.5rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--course-text-primary);
}

.bit-flipper-breakdown {
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--course-text-secondary);
    text-align: center;
    margin-bottom: 1rem;
    min-height: 1.2em;
}

.bit-flipper-slider {
    margin-bottom: 1rem;
    text-align: center;
}

.bit-flipper-slider label {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.bit-flipper-slider input[type="range"] {
    width: 100%;
    max-width: 300px;
    accent-color: var(--course-accent);
}

#slider-value {
    color: var(--course-accent-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.bit-flipper-ops {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.bit-ops-group {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.bit-ops-label {
    font-size: 0.7rem;
    color: var(--course-text-secondary);
    margin-right: 0.25rem;
}

.bit-flipper-ops button {
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    min-width: 2.2rem;
}

.bit-flipper-ops button:hover {
    border-color: var(--course-accent);
    color: var(--course-accent);
}

.bit-flipper-operand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 6px;
}

.bit-flipper-operand span {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
}

.bit-flipper-operand input {
    width: 4rem;
    padding: 0.35rem 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
    text-align: center;
}

.bit-flipper-operand button {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    background: var(--course-accent-secondary);
    border: none;
    border-radius: 4px;
    color: #000;
    cursor: pointer;
}

.bit-flipper-operand button:last-child {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    color: var(--course-text-secondary);
}

/* =====================================================
   LIVE HASH WIDGET
   ===================================================== */
.hash-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.hash-widget-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.hash-input-container {
    margin-bottom: 1rem;
}

.hash-input-container label {
    display: block;
    font-size: 0.8rem;
    color: var(--course-text-secondary);
    margin-bottom: 0.25rem;
}

.hash-input-container input {
    width: 100%;
    padding: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
}

.hash-input-container input:focus {
    outline: none;
    border-color: var(--course-accent-secondary);
}

.hash-output { margin-bottom: 1rem; }

.hash-output-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    align-items: flex-start;
}

.hash-algo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--course-accent-secondary);
    width: 60px;
    flex-shrink: 0;
}

.hash-result {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--course-accent);
    word-break: break-all;
    flex: 1;
}

.hash-info {
    text-align: center;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    margin-bottom: 1rem;
}

/* =====================================================
   AVALANCHE EFFECT WIDGET
   ===================================================== */
.avalanche-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.avalanche-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
}

.avalanche-inputs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.avalanche-input-group {
    flex: 1;
    min-width: 200px;
}

.avalanche-input-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--course-text-secondary);
    margin-bottom: 0.25rem;
}

.avalanche-input-group input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
}

.avalanche-input-group input:focus {
    outline: none;
    border-color: var(--course-accent-secondary);
}

.avalanche-quick-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.avalanche-quick-actions button {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.avalanche-quick-actions button:hover {
    border-color: var(--course-accent-secondary);
    color: var(--course-text-primary);
}

.avalanche-results { margin-bottom: 1rem; }

.avalanche-hash-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.hash-label {
    color: var(--course-text-secondary);
    width: 4rem;
}

.hash-hex {
    color: var(--course-text-primary);
    word-break: break-all;
}

.avalanche-comparison {
    background: var(--course-bg-secondary);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1rem;
}

.avalanche-bits {
    display: flex;
    flex-wrap: wrap;
    gap: 1px;
    margin-bottom: 1rem;
    justify-content: center;
}

.bit-cell {
    width: 6px;
    height: 6px;
    border-radius: 1px;
    background: var(--course-bg-code);
}

.bit-cell.changed { background: #ff6b6b; }
.bit-cell.same { background: var(--course-accent); opacity: 0.3; }

.avalanche-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.stat-item { text-align: center; }

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--course-accent-secondary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--course-text-secondary);
}

.avalanche-insight {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
    text-align: center;
    font-style: italic;
    min-height: 1.2em;
}

.avalanche-insight.perfect { color: var(--course-accent); }
.avalanche-insight.warning { color: #ffaa00; }

/* =====================================================
   SHIFT & ROTATE WIDGET
   ===================================================== */
.shift-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.shift-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.shift-bits {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 1rem;
}

.shift-bit {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
    border: 2px solid transparent;
}

.shift-bit.on {
    background: var(--course-accent);
    color: var(--course-bg-primary);
}

.shift-bit.off {
    background: var(--course-bg-secondary);
    color: var(--course-text-secondary);
    border-color: var(--course-border);
}

.shift-bit:hover { transform: scale(1.1); }

.shift-bit.moving-left,
.shift-bit.moving-right {
    animation: shiftPulse 0.2s ease-out;
}

@keyframes shiftPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

.shift-value {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-family: 'JetBrains Mono', monospace;
}

.shift-decimal { font-size: 1.5rem; color: var(--course-accent); }
.shift-hex { font-size: 1.5rem; color: var(--course-accent-secondary); }

.shift-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
}

.shift-btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.shift-btn-group button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-family: inherit;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.shift-btn-group button:hover {
    border-color: var(--course-accent);
    color: var(--course-accent);
}

.shift-history {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    text-align: center;
    min-height: 1.5em;
    margin-bottom: 1rem;
}

/* =====================================================
   CONVERTER WIDGET
   ===================================================== */
.converter-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.converter-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.converter-inputs {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.converter-field { text-align: center; }

.converter-field label {
    display: block;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    margin-bottom: 0.25rem;
}

.converter-field input {
    width: 100px;
    padding: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    text-align: center;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
}

.converter-field input:focus {
    outline: none;
    border-color: var(--course-accent-secondary);
}

.converter-binary-widget {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    padding: 0.5rem;
    min-width: 280px;
}

.converter-bits {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 0.25rem;
}

.converter-bit {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}

.converter-bit.on {
    background: var(--course-accent);
    color: var(--course-bg-primary);
}

.converter-bit.off {
    background: var(--course-bg-secondary);
    color: var(--course-text-secondary);
    border: 1px solid var(--course-border);
}

.converter-bit:hover { transform: scale(1.1); }

.converter-powers {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 0;
}

.converter-powers span {
    width: 32px;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    color: var(--course-text-secondary);
}

.converter-breakdown {
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--course-accent);
    min-height: 1.5em;
    margin-bottom: 1rem;
}

/* =====================================================
   BITWISE OPERATORS WIDGET
   ===================================================== */
.bitwise-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.bitwise-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.bitwise-tables {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.truth-table { text-align: center; }

.truth-title {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--course-accent);
    margin-bottom: 0.75rem;
}

.truth-grid-wrapper {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.truth-axis-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--course-accent-secondary);
    font-weight: 600;
}

.truth-axis-label.vertical {
    writing-mode: vertical-lr;
    transform: rotate(180deg);
}

.truth-grid-container {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.truth-col-headers {
    display: flex;
    gap: 2px;
}

.truth-col-header {
    width: 32px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--course-accent-secondary);
    font-weight: 600;
    text-align: center;
}

.truth-row {
    display: flex;
    align-items: center;
    gap: 2px;
}

.truth-row-header {
    width: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--course-accent-secondary);
    font-weight: 600;
    text-align: center;
}

.truth-grid {
    display: flex;
    gap: 2px;
}

.truth-cell {
    width: 32px;
    background: var(--course-bg-secondary);
    color: var(--course-text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    padding: 0.35rem 0;
    text-align: center;
    border: 1px solid var(--course-border);
}

.truth-cell.highlight {
    background: rgba(0, 255, 65, 0.15);
    color: var(--course-accent);
    border-color: rgba(0, 255, 65, 0.3);
}

.truth-desc {
    font-size: 0.7rem;
    color: var(--course-text-secondary);
    margin-top: 0.5rem;
}

.bitwise-demo {
    background: var(--course-bg-secondary);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.bitwise-demo-title {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
    margin-bottom: 0.75rem;
    text-align: center;
}

.bitwise-demo-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.bitwise-demo-row.result {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--course-border);
}

.bitwise-label {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--course-accent-secondary);
    width: 20px;
}

.bitwise-bits {
    display: flex;
    gap: 2px;
}

.bitwise-bit {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s;
}

.bitwise-bit.on {
    background: var(--course-accent);
    color: var(--course-bg-primary);
}

.bitwise-bit.off {
    background: var(--course-bg-code);
    color: var(--course-text-secondary);
    border: 1px solid var(--course-border);
}

.bitwise-bit:hover { transform: scale(1.1); }

#bw-bits-result .bitwise-bit { cursor: default; }

.bitwise-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--course-text-primary);
    width: 30px;
}

.bitwise-op-select {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.bw-op-btn {
    padding: 0.35rem 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.bw-op-btn:hover {
    border-color: var(--course-accent);
    color: var(--course-accent);
}

.bw-op-btn.active {
    background: var(--course-accent);
    color: var(--course-bg-primary);
    border-color: var(--course-accent);
}

/* =====================================================
   SHA DIAGRAM & SPLIT LAYOUT
   ===================================================== */
.sha-diagram-container {
    position: relative;
    margin: 1.5rem 0;
    background: #f5f5f5;
    border-radius: 8px;
    padding: 1rem;
    overflow: visible;
}

.sha-diagram {
    width: 100%;
    max-width: 800px;
    display: block;
    margin: 0 auto;
}

.sha-diagram-hotspots {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    bottom: 3rem;
    overflow: visible;
}

.sha-hotspot {
    position: absolute;
    width: 28px;
    height: 28px;
    background: rgba(0, 204, 51, 0.5);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(10, 10, 15, 0.8);
    transition: background 0.3s ease, color 0.3s ease;
}

.sha-hotspot:hover {
    background: rgba(0, 204, 51, 0);
    color: rgba(10, 10, 15, 0);
    z-index: 100;
}

.sha-hotspot .sha-tooltip {
    position: absolute;
    top: auto;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.92);
    color: var(--course-text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    z-index: 100;
}

.sha-hotspot .sha-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: calc(50% - var(--arrow-offset, 0px));
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.92);
}

.sha-hotspot:hover .sha-tooltip { opacity: 1; }
.sha-tooltip strong { color: var(--course-accent-secondary); }

.sha-diagram-caption {
    text-align: center;
    font-size: 0.8rem;
    color: #666;
    margin-top: 0.75rem;
}

.sha-diagram-caption a { color: #666; }
.sha-diagram-caption a:hover { color: #333; }

/* SHA Split Layout */
.sha-split-layout {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 1.5rem;
    margin: 1.5rem 0;
    max-width: none;
}

.sha-split-layout .sha-diagram-container {
    margin: 0;
    position: sticky;
    top: 1rem;
    align-self: start;
}

.sha-split-layout .sha-code-side { min-width: 0; }
.sha-split-layout .code-wrapper { height: 700px; }

main .sha-split-layout,
main .sha-split-layout .code-panel,
main .sha-split-layout .lang-tabs {
    max-width: none;
}

.sha-hotspot.highlighted {
    background: rgba(251, 191, 36, 0.9) !important;
    color: rgba(10, 10, 15, 1) !important;
    animation: hotspot-pulse 0.5s ease;
}

@keyframes hotspot-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* =====================================================
   AES DIAGRAM & SPLIT LAYOUT
   ===================================================== */
.aes-split-layout {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 1.5rem;
    margin: 1.5rem 0;
    max-width: none;
}

main .aes-split-layout,
main .aes-split-layout .code-panel,
main .aes-split-layout .lang-tabs {
    max-width: none;
}

.aes-split-layout .aes-diagram-container {
    margin: 0;
    position: sticky;
    top: 1rem;
    align-self: start;
}

.aes-split-layout .aes-code-side { min-width: 0; }
.aes-split-layout .code-wrapper { height: 700px; }

.aes-diagram {
    width: 100%;
    height: auto;
    border-radius: 8px;
    background: #fff;
}

.aes-diagram-container { position: relative; }

.aes-diagram-hotspots {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.aes-hotspot {
    position: absolute;
    width: 24px;
    height: 24px;
    background: var(--course-accent-secondary);
    color: var(--course-bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    pointer-events: auto;
    transition: transform 0.2s, background 0.2s;
    z-index: 10;
}

.aes-hotspot:hover {
    transform: scale(1.2);
    background: var(--course-accent);
}

.aes-tooltip {
    position: absolute;
    top: auto;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--course-bg-primary);
    color: var(--course-text-primary);
    border: 1px solid var(--course-accent-secondary);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    width: 220px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 100;
}

.aes-hotspot:hover .aes-tooltip { opacity: 1; }
.aes-tooltip strong { color: var(--course-accent-secondary); }

.aes-diagram-caption {
    text-align: center;
    font-size: 0.8rem;
    color: var(--course-text-secondary);
    margin-top: 0.5rem;
}

.aes-hotspot.highlighted {
    background: rgba(251, 191, 36, 0.9) !important;
    color: rgba(10, 10, 15, 1) !important;
    animation: hotspot-pulse 0.5s ease;
}

/* =====================================================
   SHA INTERNALS WIDGET
   ===================================================== */
.sha-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.sha-widget-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--course-accent-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.sha-input-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
}

.sha-input-row label {
    font-size: 0.85rem;
    color: var(--course-text-secondary);
}

.sha-input-row input {
    flex: 1;
    padding: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
}

.sha-input-row button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-secondary);
    cursor: pointer;
}

.sha-input-row button:hover {
    border-color: var(--course-accent-secondary);
    color: var(--course-text-primary);
}

.sha-state {
    background: var(--course-bg-primary);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.sha-round-label {
    text-align: center;
    font-size: 0.85rem;
    color: var(--course-accent-secondary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.sha-registers {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.sha-reg {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 0.25rem;
    background: var(--course-bg-code);
    border-radius: 4px;
    border: 1px solid var(--course-border);
    transition: all 0.2s;
}

.sha-reg.changed {
    border-color: var(--course-accent);
    background: rgba(0, 255, 136, 0.1);
}

.sha-reg .reg-name {
    font-size: 0.7rem;
    color: var(--course-accent-secondary);
    font-weight: 600;
}

.sha-reg .reg-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    color: var(--course-text-primary);
    word-break: break-all;
    text-align: center;
}

.sha-operations {
    text-align: center;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    line-height: 1.6;
}

.sha-op-label {
    color: var(--course-accent-secondary);
    margin-bottom: 0.25rem;
}

.sha-controls {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.sha-controls button {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-accent);
    border-radius: 4px;
    color: var(--course-accent);
    cursor: pointer;
    transition: all 0.15s;
}

.sha-controls button:hover {
    background: var(--course-accent);
    color: var(--course-bg-primary);
}

.sha-controls button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sha-final {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--course-accent);
    border-radius: 6px;
}

.sha-final-label {
    font-size: 0.8rem;
    color: var(--course-accent);
    margin-bottom: 0.5rem;
}

.sha-final-hash {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--course-text-primary);
    word-break: break-all;
}

/* =====================================================
   EXPRESSION TREE WIDGET
   ===================================================== */
.expr-widget,
.expr-tree-widget {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.expr-tree-widget {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.expr-tree-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.expr-node {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.expr-value-node,
.expr-op-node {
    border: 2px solid var(--course-accent);
    border-radius: 4px;
    padding: 10px;
    background: var(--course-bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.expr-op-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.expr-op-select {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-accent);
    color: var(--course-accent);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
}

.expr-op-param {
    width: 40px;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-accent);
    color: var(--course-accent);
    padding: 4px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    text-align: center;
}

.expr-bits-row {
    display: flex;
    gap: 2px;
}

.expr-bit {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 600;
    border-radius: 3px;
    cursor: pointer;
    transition: transform 0.1s;
    border: none;
}

.expr-bit:hover { transform: scale(1.1); }

.expr-bit.on {
    background: var(--course-accent);
    color: var(--course-bg-primary);
}

.expr-bit.off {
    background: var(--course-bg-secondary);
    color: var(--course-text-secondary);
    border: 1px solid var(--course-border);
}

.expr-bit.readonly {
    cursor: default;
    opacity: 0.6;
}

.expr-bit.readonly:hover { transform: none; }

.expr-bit.sign-bit { background: #b91c1c !important; }

.expr-bit.sign-bit.off {
    background: #7f1d1d !important;
    border-color: #991b1b;
}

.expr-powers-row {
    display: flex;
    gap: 2px;
}

.expr-power {
    width: 24px;
    text-align: center;
    font-size: 10px;
    color: var(--course-text-secondary);
}

.expr-value-display {
    font-size: 12px;
    color: var(--course-text-secondary);
}

.expr-value-display input {
    width: 50px;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    color: var(--course-accent);
    padding: 2px 4px;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    text-align: center;
}

.expr-operands {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.expr-btn {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-accent);
    color: var(--course-accent);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
}

.expr-btn:hover {
    background: var(--course-bg-card);
    box-shadow: 0 0 10px var(--course-accent);
}

.expr-result-section {
    border-top: 1px dashed var(--course-border);
    padding-top: 10px;
    margin-top: 5px;
}

.expr-result-section .expr-value-display { margin-top: 8px; }

.expr-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* =====================================================
   GF(2⁸) MULTIPLICATION WIDGET
   ===================================================== */
.gf-widget {
    background: var(--course-bg-code);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    max-width: var(--content-width);
}

.gf-inputs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.gf-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.gf-input-group label {
    font-size: 0.8rem;
    color: var(--course-text-secondary);
}

.gf-input-group input {
    width: 80px;
    padding: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    text-align: center;
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 4px;
    color: var(--course-text-primary);
}

.gf-input-group input:focus {
    outline: none;
    border-color: var(--course-accent-secondary);
}

.gf-hex-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--course-accent);
}

.gf-poly-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--course-text-secondary);
    max-width: 200px;
    text-align: center;
    word-break: break-word;
}

.gf-multiply-symbol {
    font-size: 1.5rem;
    color: var(--course-accent-secondary);
    font-weight: 600;
}

.gf-steps-table-wrapper {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.gf-steps-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

.gf-steps-table th {
    padding: 0.5rem 0.6rem;
    text-align: left;
    color: var(--course-text-secondary);
    font-weight: 500;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--course-border);
}

.gf-steps-table td {
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--course-text-primary);
}

.gf-steps-table .gf-hex {
    color: var(--course-accent);
}

.gf-steps-table .gf-bin {
    color: var(--course-text-secondary);
    font-size: 0.7rem;
    margin-left: 0.35rem;
}

.gf-row-active {
    background: rgba(0, 255, 65, 0.08);
}

.gf-row-reduced {
    background: rgba(255, 100, 100, 0.08);
}

.gf-row-active.gf-row-reduced {
    background: linear-gradient(90deg, rgba(0, 255, 65, 0.08), rgba(255, 100, 100, 0.08));
}

.gf-yes {
    color: var(--course-accent);
    font-weight: 600;
}

.gf-no {
    color: var(--course-text-secondary);
    opacity: 0.5;
}

.gf-reduction {
    color: #ff7b9c;
    font-weight: 600;
}

.gf-result {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 6px;
    flex-wrap: wrap;
}

.gf-result-label {
    font-weight: 600;
    color: var(--course-accent-secondary);
    font-size: 0.9rem;
}

.gf-result-dec {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--course-text-primary);
}

.gf-result-hex {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--course-accent);
}

.gf-result-poly {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--course-text-secondary);
}

.gf-result-sep {
    color: var(--course-text-secondary);
    opacity: 0.5;
}

/* =====================================================
   RESPONSIVE OVERRIDES
   ===================================================== */
@media (max-width: 1200px) {
    .sha-split-layout,
    .aes-split-layout {
        grid-template-columns: 1fr;
    }

    .sha-split-layout .sha-diagram-container,
    .aes-split-layout .aes-diagram-container {
        position: relative;
    }

    .aes-hotspot { display: none; }
}

@media (max-width: 700px) {
    .lang-tab {
        padding: 0.5rem 0.8rem;
        font-size: 0.7rem;
    }

    .code-editor,
    .code-static,
    .code-highlight {
        font-size: 0.75rem;
    }

    .code-wrapper,
    .code-static {
        height: 350px;
    }

    .code-gutter {
        width: 32px;
        font-size: 0.7rem;
    }

    .code-gutter-inner { padding-top: 0.75rem; }

    .code-editor,
    .code-static,
    .code-highlight {
        padding-left: calc(32px + 0.75rem);
    }

    .gutter-num { font-size: 0.65rem; }
    .gutter-line { height: 1.6em; }
    .gutter-info-btn { width: 14px; height: 14px; font-size: 0.55rem; }
    .code-info-tooltip { width: 260px; font-size: 0.75rem; }

    .sha-hotspot { z-index: 50; }
    .sha-diagram-hotspots { z-index: 50; }

    /* Widget responsive fixes */
    .bit-flipper,
    .shift-widget,
    .converter-widget,
    .bitwise-widget,
    .hash-widget,
    .avalanche-widget {
        padding: 1rem;
        margin: 1rem 0;
    }

    .bit-flipper-bits,
    .shift-bits,
    .converter-bits {
        gap: 2px;
    }

    .bit-toggle,
    .shift-bit,
    .converter-bit {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }

    .bitwise-bit {
        width: 20px;
        height: 20px;
        font-size: 0.75rem;
    }

    .converter-powers span {
        width: 28px;
        font-size: 0.5rem;
    }

    .bit-flipper-ops,
    .shift-controls {
        gap: 0.5rem;
    }

    .bit-ops-group button,
    .shift-btn-group button {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }

    .truth-table { transform: scale(0.9); }
    .bitwise-tables { gap: 1rem; }

    /* GF widget responsive */
    .gf-widget { padding: 1rem; }
    .gf-steps-table .gf-bin { display: none; }
    .gf-steps-table { font-size: 0.7rem; }
    .gf-steps-table th,
    .gf-steps-table td { padding: 0.3rem 0.4rem; }
}