:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-input: #0f0f1a;
    --text-primary: #e0e0e0;
    --text-prompt: #4ade80;
    --text-code: #facc15;
    --text-result: #60a5fa;
    --text-error: #f87171;
    --text-system: #a78bfa;
    --text-success: #4ade80;
    --border-color: #2d2d4a;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --sidebar-width: 240px;
    --sidebar-collapsed: 48px;
    --sidebar-editor-width: 480px;
}

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

body {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.repl-container {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid var(--border-color);
    min-height: 80vh;
}

.repl-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}



/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-input);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 14px 12px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 52px;
}

.sidebar-header h2 {
    font-size: 0.9rem;
    color: var(--text-system);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-header h2 {
    display: none;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.btn-icon:hover {
    background: var(--bg-secondary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px 8px;
}

.sidebar.collapsed .sidebar-content {
    display: none;
}

.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* Search */
.search-wrapper {
    padding: 4px 8px;
    margin-bottom: 12px;
}

#lib-search {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    outline: none;
    transition: border-color 0.2s;
}

#lib-search:focus {
    border-color: var(--text-prompt);
}

#lib-search::placeholder {
    color: #555;
}

/* Categories */
.lib-category {
    margin-bottom: 8px;
}

.category-header {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 10px 12px;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.category-header:hover {
    background: var(--bg-secondary);
}

.cat-arrow {
    font-size: 0.7rem;
    color: var(--text-system);
    width: 14px;
}

.category-items {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
}

.lib-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-code);
    padding: 5px 10px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.lib-btn:hover {
    background: var(--border-color);
    border-color: var(--text-prompt);
    color: var(--text-prompt);
}

.lib-btn.imported {
    background: rgba(74, 222, 128, 0.15);
    border-color: var(--text-success);
    color: var(--text-success);
}

.lib-btn.imported::after {
    content: " ✓";
    font-size: 0.65rem;
}

/* Pip section */
.pip-category .category-items {
    flex-direction: column;
}

.pip-input-wrapper {
    display: flex;
    gap: 6px;
    padding: 0 12px;
}

#pip-input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 8px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    outline: none;
    min-width: 0;
}

#pip-input:focus {
    border-color: var(--text-prompt);
}

.btn-small {
    background: var(--text-prompt);
    color: var(--bg-primary);
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    white-space: nowrap;
    transition: opacity 0.2s;
}

.btn-small:hover {
    opacity: 0.9;
}

.pip-note {
    font-size: 0.65rem;
    color: #666;
    padding: 4px 12px;
    margin-top: 4px;
}

/* Imported section */
.imported-section {
    margin-top: 16px;
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

.imported-title {
    font-size: 0.75rem;
    color: var(--text-success);
    margin-bottom: 8px;
}

#imported-list {
    font-size: 0.75rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.no-imports {
    color: #555;
    font-style: italic;
}

/* Main content */
.repl-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    background: var(--bg-input);
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-only {
    display: none;
}

.repl-header h1 {
    font-size: 1.1rem;
    color: var(--text-prompt);
    font-weight: 600;
    letter-spacing: 1px;
}

.repl-controls {
    display: flex;
    gap: 10px;
}

.btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn:hover {
    background: var(--border-color);
    border-color: var(--text-prompt);
}

.btn:active {
    transform: scale(0.98);
}

.btn-danger {
    background: #2d1f1f;
    border-color: #8b4444;
    color: #f87171;
}

.btn-danger:hover {
    background: #3d2828;
    border-color: #f87171;
}

.repl-output {
    flex: 1;
    min-height: 400px;
    max-height: 60vh;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg-input);
    font-size: 0.92rem;
    line-height: 1.6;
}

.repl-output::-webkit-scrollbar {
    width: 8px;
}

.repl-output::-webkit-scrollbar-track {
    background: var(--bg-input);
}

.repl-output::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.repl-output::-webkit-scrollbar-thumb:hover {
    background: var(--text-system);
}

.prompt {
    color: var(--text-prompt);
    font-weight: bold;
}

.code {
    color: var(--text-code);
}

.result {
    color: var(--text-result);
}

.error {
    color: var(--text-error);
}

.system {
    color: var(--text-system);
    font-style: italic;
}

.success {
    color: var(--text-success);
}

.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    margin: 8px 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.88rem;
    color: var(--text-code);
    max-height: 300px;
    overflow-y: auto;
}

.code-block::-webkit-scrollbar {
    width: 6px;
}

.code-block::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.repl-input-area {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.repl-input-area .prompt {
    margin-right: 12px;
    font-size: 1.1rem;
}

#repl-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 0.92rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s ease;
}

#repl-input:focus {
    border-color: var(--text-prompt);
}

#repl-input::placeholder {
    color: #555;
}

.repl-status {
    display: flex;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--bg-input);
    border-top: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: #666;
}

#status-text {
    color: var(--text-prompt);
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 100;
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: 5px 0 30px rgba(0, 0, 0, 0.5);
    }

    .sidebar.collapsed {
        width: 280px;
    }

    .sidebar.collapsed .sidebar-content {
        display: block;
    }

    .mobile-only {
        display: inline-flex;
    }

    .repl-header {
        flex-wrap: wrap;
        gap: 12px;
    }

    .repl-output {
        min-height: 300px;
        padding: 15px;
    }

    .repl-input-area {
        flex-direction: column;
        gap: 10px;
    }

    #repl-input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .repl-controls {
        flex-wrap: wrap;
    }

    .btn {
        padding: 6px 12px;
        font-size: 0.78rem;
    }
}

/* Right Sidebar - Editor */
.sidebar-right {
    width: var(--sidebar-editor-width);
    min-width: var(--sidebar-editor-width);
    min-height: 0;
    background: var(--bg-input);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.editor-buttons {
    display: flex;
    gap: 6px;
    padding: 12px 8px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

#editor-input {
    display: none;
}

.CodeMirror {
    flex: 1;
    height: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: var(--bg-secondary) !important;
}

.CodeMirror-gutters {
    background: var(--bg-input) !important;
    border-right: 1px solid var(--border-color) !important;
}

/* Colori alternati per le righe di edit (Zebra striping) */
.CodeMirror-code > div:nth-child(odd) {
    background-color: rgba(255, 255, 255, 0.035);
}

.editor-buttons .btn {
    flex: 1;
    min-width: 70px;
    padding: 6px 8px;
    font-size: 0.75rem;
}

.btn-success {
    background: rgba(74, 222, 128, 0.15);
    border-color: var(--text-success);
    color: var(--text-success);
}

.btn-success:hover {
    background: rgba(74, 222, 128, 0.25);
}

#editor-input:focus {
    outline: none;
}

#editor-input::placeholder {
    color: #555;
}

.resizer {
    width: 6px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    cursor: col-resize;
    z-index: 10;
    transition: background 0.2s;
}

.resizer:hover, .resizer.resizing {
    background: var(--text-prompt);
}