/* ===================================
   CODE BLOCKS - COPY-PASTE READY
   =================================== */

.code-block {
    position: relative;
    margin: var(--spacing-lg) 0;
    background: #282c34;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.code-block-lang {
    font-size: var(--text-sm);
    font-weight: 600;
    color: #61dafb;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, var(--klein-blue), var(--klein-light));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 47, 167, 0.4);
}

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

.copy-btn.copied {
    background: linear-gradient(135deg, #50C878, #3BA05F);
}

.code-block pre {
    margin: 0;
    padding: var(--spacing-lg);
    overflow-x: auto;
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 14px;
    line-height: 1.6;
}

.code-block code {
    font-family: inherit;
    color: #abb2bf;
}

/* Highlight.js custom theme adjustments */
.hljs {
    background: transparent !important;
    padding: 0 !important;
}

/* Inline code */
code:not(.hljs) {
    background: rgba(0, 47, 167, 0.08);
    color: var(--klein-dark);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 0.9em;
}

[data-theme="dark"] code:not(.hljs) {
    background: rgba(90, 139, 255, 0.15);
    color: var(--klein-light);
}

/* Code examples with title */
.code-example {
    margin: var(--spacing-xl) 0;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-example-title {
    background: linear-gradient(135deg, var(--klein-blue), var(--cosmic-purple));
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    font-size: var(--text-sm);
}

/* Live preview frame */
.code-preview {
    padding: var(--spacing-lg);
    background: white;
    border-bottom: 2px solid var(--color-border);
}

.code-preview-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   EXERCISE BLOCKS
   =================================== */

.exercise {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05), rgba(255, 107, 53, 0.05));
    border-left: 4px solid var(--cosmic-gold);
    border-radius: var(--radius-lg);
}

.exercise-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--orange-fauve);
    margin-bottom: var(--spacing-md);
}

.exercise-content {
    margin-bottom: var(--spacing-md);
}

.exercise-solution {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px dashed var(--color-border);
}

.exercise-solution-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--cosmic-purple), var(--cosmic-pink));
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.exercise-solution-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.exercise-solution-content {
    display: none;
    margin-top: var(--spacing-md);
}

.exercise-solution-content.visible {
    display: block;
}

/* ===================================
   TIPS AND NOTES
   =================================== */

.tip, .note, .warning {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
}

.tip {
    background: linear-gradient(135deg, rgba(80, 200, 120, 0.08), rgba(80, 200, 120, 0.05));
    border-color: var(--vert-mediterrane);
}

.tip-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    color: var(--vert-mediterrane);
    margin-bottom: var(--spacing-sm);
}

.note {
    background: linear-gradient(135deg, rgba(0, 47, 167, 0.08), rgba(90, 139, 255, 0.05));
    border-color: var(--klein-blue);
}

.note-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    color: var(--klein-blue);
    margin-bottom: var(--spacing-sm);
}

.warning {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(231, 76, 60, 0.05));
    border-color: var(--orange-fauve);
}

.warning-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    color: var(--orange-fauve);
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   LESSON NUMBER BADGE
   =================================== */

.lesson-number {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, var(--klein-blue), var(--klein-light));
    color: white;
    font-weight: 700;
    font-size: var(--text-sm);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
}

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

@media (max-width: 768px) {
    .code-block pre {
        padding: var(--spacing-md);
        font-size: 13px;
    }
    
    .code-block-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .copy-btn {
        width: 100%;
        justify-content: center;
    }
}