/* PPK IDE - Modern Dark Theme Stylesheet */

:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --bg-hover: #37373d;
    --border-color: #3e3e42;
    --text-primary: #cccccc;
    --text-secondary: #969696;
    --accent-blue: #007acc;
    --accent-green: #4ec9b0;
    --accent-orange: #ce9178;
    --accent-red: #f48771;
    --header-height: 50px;
    --footer-height: 24px;
    --sidebar-width: 250px;
    --panel-width: 350px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}

/* Layout */
.ide-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100); /* Use JS-calculated vh for mobile */
    height: 100dvh; /* Use dynamic viewport height if supported */
    min-height: -webkit-fill-available; /* iOS Safari fix */
}

/* =========================================================================
   Context Menu (right-click / long-press)
   ========================================================================= */
.context-menu {
    position: fixed;
    z-index: 9999;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.5);
    min-width: 200px;
    max-width: 260px;
    padding: 4px 0;
    font-size: 13px;
    animation: ctxFadeIn 0.12s ease-out;
}

@keyframes ctxFadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.context-menu-header {
    padding: 4px 12px;
    font-size: 10px;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    font-weight: 600;
}

.context-menu-item {
    display: block;
    width: 100%;
    padding: 8px 14px;
    background: none;
    border: none;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.1s;
    white-space: nowrap;
}

.context-menu-item:hover,
.context-menu-item:focus {
    background: var(--accent-blue);
    color: #fff;
    outline: none;
}

.context-menu-item:active {
    background: #005a9e;
}

.context-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 8px;
}

@media (max-width: 768px) {
    .context-menu {
        min-width: 180px;
        font-size: 14px;
    }
    .context-menu-item {
        padding: 12px 14px;
        min-height: 44px;
    }
}

.ide-header {
    height: var(--header-height);
    min-height: var(--header-height);
    max-height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 15px;
    flex-shrink: 0;
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.header-left h1 {
    font-size: 18px;
    margin: 0;
    display: inline-block;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    white-space: nowrap;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 12px;
}

.ide-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.ide-sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar-header {
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 14px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.sidebar-actions {
    display: flex;
    gap: 4px;
}

.sidebar-actions .btn-icon {
    font-size: 14px;
    padding: 4px 6px;
}

.projects-list, .files-tree {
    padding: 5px;
}

.project-item, .file-item {
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    margin: 2px 0;
    transition: background 0.2s;
}

.project-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-item .project-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.project-item .btn-delete-project,
.project-item .btn-export-project {
    opacity: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 14px;
    transition: opacity 0.2s, background 0.2s;
}

.project-item:hover .btn-delete-project,
.project-item:focus-within .btn-delete-project,
.project-item:hover .btn-export-project,
.project-item:focus-within .btn-export-project {
    opacity: 0.7;
}

.project-item .btn-delete-project:hover,
.project-item .btn-delete-project:active {
    opacity: 1;
    background: rgba(255, 100, 100, 0.2);
}

.project-item .btn-export-project:hover,
.project-item .btn-export-project:active {
    opacity: 1;
    background: rgba(100, 180, 255, 0.2);
}

/* Mobile: always show project buttons */
@media (max-width: 768px) {
    .project-item .btn-delete-project,
    .project-item .btn-export-project {
        opacity: 0.6;
        padding: 8px 12px;
        font-size: 16px;
    }
}

.project-item:hover, .file-item:hover {
    background: var(--bg-hover);
}

.project-item.active, .file-item.active {
    background: var(--accent-blue);
    color: white;
}

.file-item {
    padding-left: 25px;
    font-size: 13px;
}

.file-item::before {
    content: "📄 ";
    margin-right: 5px;
}

.file-item.java::before { content: "☕ "; }
.file-item.inc::before { content: "📜 "; }
.file-item.html::before { content: "🌐 "; }

/* Outline panel */
.outline-section {
    border-top: 1px solid var(--border-color);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100px;
    overflow: hidden;
}

.outline-tree {
    padding: 4px;
    overflow-y: auto;
    flex: 1;
    font-size: 13px;
}

.outline-placeholder {
    color: var(--text-secondary);
    text-align: center;
    padding: 15px 10px;
    font-size: 12px;
}

.outline-item {
    padding: 4px 8px;
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.outline-item:hover {
    background: var(--bg-hover);
}

.outline-item.active {
    background: rgba(0, 122, 204, 0.2);
}

.outline-icon {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
    flex-shrink: 0;
}

.outline-icon.class    { background: #e2a83e; color: #1e1e1e; }
.outline-icon.interface{ background: #4ec9b0; color: #1e1e1e; }
.outline-icon.method   { background: #9b6dff; color: #fff; }
.outline-icon.field    { background: #007acc; color: #fff; }
.outline-icon.const    { background: #d19a66; color: #1e1e1e; }
.outline-icon.enum     { background: #e06c75; color: #fff; }
.outline-icon.import   { background: #555; color: #ccc; }
.outline-icon.package  { background: #555; color: #ccc; }
.outline-icon.constructor { background: #c678dd; color: #fff; }

.outline-name {
    overflow: hidden;
    text-overflow: ellipsis;
}

.outline-detail {
    color: var(--text-secondary);
    font-size: 11px;
    margin-left: auto;
    flex-shrink: 0;
}

.outline-group {
    margin-bottom: 2px;
}

.outline-group-header {
    padding: 4px 8px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    user-select: none;
}

.outline-item.indent-1 { padding-left: 20px; }
.outline-item.indent-2 { padding-left: 32px; }

/* Command Wizard */
.wiz-params-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 180px;
    overflow-y: auto;
}

.wiz-param-row {
    display: flex;
    gap: 6px;
    align-items: center;
}

.wiz-param-row input {
    flex: 1;
    padding: 6px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 13px;
}

.wiz-param-row select {
    width: 100px;
    padding: 6px 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 13px;
}

.wiz-param-row .btn-remove-param {
    background: transparent;
    border: none;
    color: var(--accent-red);
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    flex-shrink: 0;
}

.wiz-preview {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.wiz-preview-header {
    padding: 6px 10px;
    background: var(--bg-tertiary);
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.wiz-preview-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.wiz-tab {
    flex: 1;
    padding: 6px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    border-bottom: 2px solid transparent;
}

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

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

.wiz-preview-code {
    padding: 10px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    font-size: 12px;
    white-space: pre;
    overflow-x: auto;
    max-height: 200px;
    margin: 0;
}

.ide-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.editor-toolbar {
    display: flex;
    align-items: stretch;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 36px;
}

.editor-tabs {
    display: flex;
    flex: 1;
    overflow-x: auto;
    min-width: 0;
}

.editor-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0 4px;
    border-left: 1px solid var(--border-color);
    flex-shrink: 0;
    overflow-x: auto;
}

.editor-tab {
    padding: 8px 15px;
    background: var(--bg-tertiary);
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 13px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.editor-tab:hover {
    background: var(--bg-hover);
}

.editor-tab.active {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--accent-blue);
}

.editor-tab .close {
    opacity: 0.5;
    margin-left: 8px;
}

.editor-tab .close:hover {
    opacity: 1;
}

.editor-content {
    flex: 1;
    overflow: hidden;
}

.code-editor-wrapper {
    height: 100%;
    background: var(--bg-primary);
    position: relative;
}

/* CodeMirror 6 editor styling */
.code-editor-wrapper .cm-editor {
    height: 100%;
}

.code-editor-wrapper .cm-scroller {
    overflow: auto;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 40px;
}

.welcome-screen h2 {
    margin-bottom: 20px;
    color: var(--accent-blue);
}

.welcome-screen ul {
    list-style: none;
    margin: 20px 0;
}

.welcome-screen li {
    padding: 8px 0;
    font-size: 16px;
}

/* Panel toggle - hidden on desktop, shown on mobile */
.panel-toggle-mobile {
    display: none;
}

.ide-panel {
    width: var(--panel-width);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.panel-tabs {
    display: flex;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    scrollbar-width: thin;
}

.panel-tab {
    flex: 0 0 auto;
    padding: 10px 12px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
    white-space: nowrap;
}

.panel-tab:hover {
    background: var(--bg-hover);
}

.panel-tab.active {
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-blue);
}

.panel-content {
    flex: 1;
    overflow: hidden;
}

.panel-pane {
    height: 100%;
    padding: 10px;
    display: none;
    overflow-y: auto;
}

.panel-pane.active {
    display: block;
}

/* Search in Project */
.search-in-project {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.search-input-row {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.search-input-row input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 13px;
}

.search-input-row input:focus {
    border-color: var(--accent-blue);
    outline: none;
}

.project-search-results {
    flex: 1;
    overflow-y: auto;
    font-size: 12px;
}

.search-result-file {
    color: var(--accent-blue);
    padding: 4px 0 2px 0;
    font-weight: bold;
    font-size: 13px;
}

.search-result-line {
    padding: 2px 8px;
    cursor: pointer;
    display: flex;
    gap: 8px;
    border-radius: 3px;
}

.search-result-line:hover {
    background: var(--bg-hover);
}

.search-result-linenum {
    color: var(--accent-green);
    min-width: 30px;
    text-align: right;
    flex-shrink: 0;
}

.search-result-text {
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-text mark {
    color: var(--accent-orange);
    background: rgba(234, 92, 0, 0.2);
    font-weight: bold;
}

.search-no-results {
    color: #888;
    padding: 20px 0;
    text-align: center;
}

.console-toolbar {
    display: flex;
    gap: 4px;
    padding: 4px 8px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.console-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 11px;
    transition: background 0.15s;
}

.console-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.console-output, .build-output {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.6;
}

.console-line {
    padding: 2px 0;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: text;
}

.console-line:hover {
    background: var(--bg-hover);
}

.console-line.error {
    color: var(--accent-red);
}

.console-line.success {
    color: var(--accent-green);
}

/* =========================================================================
   AI Assistant Panel
   ========================================================================= */

.ai-chat {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 0;
}

.ai-toolbar {
    display: flex;
    gap: 4px;
    padding: 6px 0;
    flex-wrap: wrap;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 6px;
    flex-shrink: 0;
}

.ai-action-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
}

.ai-action-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.ai-action-btn:active {
    transform: scale(0.96);
}

.ai-rate-limit {
    margin-left: auto;
    font-size: 10px;
    color: var(--text-secondary);
    opacity: 0.7;
}

.ai-auto-apply {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    margin-left: 8px;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    transition: all 0.15s;
}

.ai-auto-apply:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.ai-auto-apply input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.ai-auto-apply input[type="checkbox"]:checked + span {
    color: var(--accent-green);
}

.ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-msg {
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.5;
    max-width: 95%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.ai-msg.user {
    background: var(--accent-blue);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}

.ai-msg.assistant {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
    border: 1px solid var(--border-color);
}

.ai-msg.assistant .ai-msg-text {
    white-space: pre-wrap;
}

.ai-msg.assistant .ai-msg-text code {
    background: var(--bg-primary);
    padding: 1px 4px;
    border-radius: 3px;
    font-family: 'Fira Code', monospace;
    font-size: 11px;
}

.ai-msg.assistant .ai-msg-text pre {
    background: var(--bg-primary);
    padding: 8px;
    border-radius: 4px;
    overflow-x: auto;
    margin: 6px 0;
    font-size: 11px;
    line-height: 1.4;
}

.ai-msg.assistant .ai-msg-text pre code {
    background: none;
    padding: 0;
}

.ai-msg.system {
    background: transparent;
    color: var(--text-secondary);
    font-size: 11px;
    font-style: italic;
    align-self: center;
    text-align: center;
    padding: 4px;
}

.ai-msg.error {
    background: rgba(255, 80, 80, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(255, 80, 80, 0.3);
    align-self: flex-start;
}

/* File changes proposed by AI */
.ai-file-changes {
    margin-top: 8px;
    border-top: 1px solid var(--border-color);
    padding-top: 6px;
}

.ai-file-change {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 6px;
    margin: 3px 0;
    background: var(--bg-primary);
    border-radius: 4px;
    font-size: 11px;
}

.ai-file-change-name {
    color: var(--accent-blue);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ai-file-change-action {
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 3px;
    text-transform: uppercase;
    font-weight: bold;
}

.ai-file-change-action.modify {
    background: rgba(78, 154, 241, 0.2);
    color: var(--accent-blue);
}

.ai-file-change-action.create {
    background: rgba(72, 199, 142, 0.2);
    color: var(--accent-green);
}

.ai-apply-btn {
    background: var(--accent-green);
    color: #fff;
    border: none;
    padding: 3px 10px;
    border-radius: 3px;
    font-size: 11px;
    cursor: pointer;
    font-weight: bold;
}

.ai-apply-btn:hover {
    filter: brightness(1.15);
}

.ai-apply-btn.applied {
    background: var(--text-secondary);
    cursor: default;
    opacity: 0.6;
}

.ai-diff-btn {
    background: var(--bg-hover);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
    cursor: pointer;
}

.ai-diff-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

/* AI input area */
.ai-input-area {
    display: flex;
    gap: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    align-items: flex-end;
}

.ai-input-area textarea {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-family: inherit;
    resize: none;
    min-height: 32px;
    max-height: 120px;
    line-height: 1.4;
}

.ai-input-area textarea:focus {
    border-color: var(--accent-blue);
    outline: none;
}

.ai-send-btn {
    padding: 6px 14px !important;
    font-size: 12px;
    border-radius: 6px;
    min-height: 32px;
    flex-shrink: 0;
}

/* AI loading spinner */
.ai-loading {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
}

.ai-loading .spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.ide-footer {
    height: var(--footer-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    font-size: 11px;
}

.status-right {
    display: flex;
    gap: 15px;
}

.player-status {
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 3px;
    transition: all 0.2s;
}

.player-status:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background: #106ead;
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-success:hover {
    background: #3da88f;
}

.btn-play {
    background: #7c3aed;
    color: white;
    font-weight: bold;
}

.btn-play:hover {
    background: #6d28d9;
}

.btn-play:active {
    background: #5b21b6;
    transform: scale(0.97);
}

.btn-info {
    background: #0891b2;
    color: white;
}

.btn-info:hover {
    background: #0e7490;
}

.btn-warning {
    background: #e69500;
    color: white;
}

.btn-warning:hover {
    background: #cc8400;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
}

.btn-icon:hover {
    color: var(--text-primary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: auto;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: 60px;
    left: 10px;
    z-index: 1000;
    width: 44px;
    height: 44px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    touch-action: manipulation;
}

/* Mobile-First Responsive Design */
@media (max-width: 1024px) {
    :root {
        --panel-width: 280px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
        --sidebar-width: 280px;
        --panel-width: 100%;
    }
    
    .mobile-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .ide-header {
        height: var(--header-height);
        min-height: var(--header-height);
        max-height: var(--header-height);
        padding: 4px 8px;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    .header-left {
        flex-shrink: 0;
    }
    
    .header-left h1 {
        font-size: 14px;
    }
    
    .header-center {
        display: none;
    }
    
    .header-right {
        flex-shrink: 0;
        gap: 3px;
    }
    
    .header-right .btn {
        padding: 4px 6px;
        font-size: 11px;
        min-height: 32px;
        white-space: nowrap;
    }
    
    .ide-main {
        flex-direction: column;
    }
    
    .ide-sidebar {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        bottom: 0;
        width: var(--sidebar-width);
        max-width: 85vw;
        transition: left 0.3s ease, transform 0.3s ease;
        z-index: 200;
        box-shadow: 2px 0 10px rgba(0,0,0,0.5);
    }
    
    .ide-sidebar.open {
        left: 0;
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 199;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
    
    .ide-editor {
        flex: 1;
        min-height: 50vh;
    }
    
    .ide-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 45vh;
        width: 100%;
        border-top: 1px solid var(--border-color);
        border-left: none;
        transform: translateY(100%);
        transition: transform 0.3s ease;
        z-index: 240;
        background: var(--bg-secondary);
    }
    
    .ide-panel.open {
        transform: translateY(0);
    }
    
    .panel-toggle-mobile {
        display: flex !important;
        position: fixed;
        bottom: 20px;
        right: 20px;
        z-index: 250;
        width: 56px;
        height: 56px;
        background: var(--accent-green);
        color: white;
        border: none;
        border-radius: 50%;
        font-size: 20px;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    }
    
    .panel-toggle-mobile.panel-open {
        background: var(--accent-blue);
    }
    
    /* Touch-friendly file items */
    .project-item, .file-item {
        padding: 14px 16px;
        min-height: 48px;
        display: flex;
        align-items: center;
    }
    
    /* Modal adjustments for mobile */
    .modal-content {
        width: 95%;
        max-width: 100%;
        max-height: 90vh;
        margin: 5vh auto;
        border-radius: 12px;
    }
    
    .modal-header {
        padding: 16px;
    }
    
    .modal-body {
        padding: 16px;
        max-height: calc(90vh - 140px);
        overflow-y: auto;
    }
    
    .modal-footer {
        padding: 16px;
        flex-direction: column;
        gap: 10px;
    }
    
    .modal-footer .btn {
        width: 100%;
        min-height: 48px;
    }
    
    /* Form adjustments */
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;
        padding: 14px 12px;
        min-height: 48px;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    /* Editor tabs touch-friendly */
    .editor-tab {
        padding: 12px 16px;
        min-width: 100px;
    }
    
    /* Status bar adjustments */
    .ide-footer {
        height: 32px;
        padding: 0 10px;
    }
    
    .status-section {
        font-size: 11px;
    }
    
    /* Console output touch scrolling */
    .console-output, .build-output {
        -webkit-overflow-scrolling: touch;
    }
    
    /* Welcome screen mobile */
    .welcome-screen {
        padding: 20px;
    }
    
    .welcome-screen h2 {
        font-size: 20px;
    }
    
    .welcome-actions {
        flex-direction: column;
    }
    
    .welcome-actions button {
        width: 100%;
        min-height: 48px;
    }
}

@media (max-width: 480px) {
    :root {
        --header-height: 48px;
    }
    
    .header-left h1 {
        font-size: 14px;
    }
    
    .subtitle {
        display: none;
    }
    
    .header-right .btn {
        padding: 3px 5px;
        font-size: 10px;
    }
    
    .modal-content {
        width: 100%;
        height: 100%;
        max-height: 100%;
        margin: 0;
        border-radius: 0;
    }
    
    .modal-body {
        max-height: calc(100vh - 140px);
    }
    
    .ide-panel.open {
        height: 60vh;
    }
    
    /* Larger touch targets */
    .project-item, .file-item {
        padding: 16px;
        min-height: 52px;
    }
}

/* Safe area insets for notched devices */
@supports (padding: env(safe-area-inset-top)) {
    .ide-header {
        padding-top: env(safe-area-inset-top);
        height: calc(var(--header-height) + env(safe-area-inset-top));
        min-height: calc(var(--header-height) + env(safe-area-inset-top));
        max-height: calc(var(--header-height) + env(safe-area-inset-top));
    }
    
    .ide-footer {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(24px + env(safe-area-inset-bottom));
    }
    
    .ide-sidebar {
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .modal-content {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* Scrollbar - thinner on mobile */
@media (max-width: 768px) {
    ::-webkit-scrollbar {
        width: 6px;
        height: 6px;
    }
}

/* Landscape phone optimization */
@media (max-height: 500px) and (orientation: landscape) {
    .ide-panel {
        height: 60vh;
    }
    
    .modal-content {
        max-height: 95vh;
    }
    
    .modal-body {
        max-height: calc(95vh - 120px);
    }
}

/* Desktop scrollbar */
@media (min-width: 769px) {
    ::-webkit-scrollbar {
        width: 10px;
        height: 10px;
    }
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}
/* =========================================================================
   Editor Theme Variants
   ========================================================================= */

/* Light theme for CodeMirror */
.cm-light-theme {
    --cm-bg: #ffffff;
    --cm-fg: #24292e;
    --cm-gutter-bg: #f6f8fa;
    --cm-line-highlight: #f1f8ff;
}

.cm-light-theme .cm-editor {
    background-color: var(--cm-bg);
    color: var(--cm-fg);
}

.cm-light-theme .cm-gutters {
    background-color: var(--cm-gutter-bg);
    color: #6e7781;
    border-right: 1px solid #d0d7de;
}

.cm-light-theme .cm-activeLineGutter,
.cm-light-theme .cm-activeLine {
    background-color: var(--cm-line-highlight);
}

.cm-light-theme .cm-selectionBackground {
    background-color: #b4d5fe !important;
}

.cm-light-theme .cm-cursor {
    border-left-color: #24292e;
}

/* Light theme syntax highlighting overrides */
.cm-light-theme .cm-content {
    caret-color: #24292e;
}

/* Keyword - purple */
.cm-light-theme .tok-keyword { color: #d73a49 !important; }
/* String - blue */
.cm-light-theme .tok-string { color: #032f62 !important; }
/* Number - blue */
.cm-light-theme .tok-number { color: #005cc5 !important; }
/* Comment - green */
.cm-light-theme .tok-comment { color: #6a737d !important; font-style: italic; }
/* Function name - purple */
.cm-light-theme .tok-function { color: #6f42c1 !important; }
/* Variable name */
.cm-light-theme .tok-variableName { color: #24292e !important; }
/* Type name - teal */
.cm-light-theme .tok-typeName { color: #22863a !important; }
/* Operator */
.cm-light-theme .tok-operator { color: #d73a49 !important; }
/* Punctuation */
.cm-light-theme .tok-punctuation { color: #24292e !important; }

/* Dark theme (default) */
.cm-dark-theme {
    /* Already handled by One Dark theme from CodeMirror */
}

/* Settings form spacing */
#modal-settings h4 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--accent-blue);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

#modal-settings .form-group {
    margin-bottom: 12px;
}

#modal-settings .form-group label {
    margin-bottom: 4px;
}

/* Dependencies Modal */
.deps-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.deps-tab {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    font-size: 13px;
}

.deps-tab.active {
    background: var(--accent-blue);
    color: white;
}

.deps-panel {
    display: none;
}

.deps-panel.active {
    display: block;
}

.deps-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 15px;
}

.deps-cat {
    padding: 4px 10px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 3px;
    font-size: 12px;
}

.deps-cat.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.deps-list {
    max-height: 350px;
    overflow-y: auto;
}

.dep-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 8px;
    border: 1px solid var(--border-color);
}

.dep-item:hover {
    border-color: var(--accent-blue);
}

.dep-info {
    flex: 1;
}

.dep-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.dep-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.dep-version {
    font-size: 11px;
    color: var(--accent-blue);
    font-family: monospace;
}

.dep-actions {
    display: flex;
    gap: 5px;
}

.dep-actions .btn {
    padding: 4px 10px;
    font-size: 12px;
}

/* Compiler Error Markers */
.cm-error-line {
    background-color: rgba(244, 135, 113, 0.15) !important;
}

.cm-error-underline {
    text-decoration: wavy underline #f48771;
    text-underline-offset: 3px;
}

.cm-warning-line {
    background-color: rgba(230, 149, 0, 0.15) !important;
}

.cm-warning-underline {
    text-decoration: wavy underline #e69500;
    text-underline-offset: 3px;
}

/* Error gutter marker */
.cm-error-gutter {
    color: #f48771;
    font-size: 14px;
}

.cm-warning-gutter {
    color: #e69500;
    font-size: 14px;
}

/* Problems panel */
.problems-list {
    font-family: monospace;
    font-size: 12px;
}

.problem-item {
    padding: 6px 10px;
    cursor: pointer;
    display: flex;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
}

.problem-item:hover {
    background: var(--bg-hover);
}

.problem-item.error {
    border-left: 3px solid #f48771;
}

.problem-item.warning {
    border-left: 3px solid #e69500;
}

.problem-icon {
    width: 16px;
}

.problem-icon.error {
    color: #f48771;
}

.problem-icon.warning {
    color: #e69500;
}

.problem-location {
    color: var(--accent-blue);
    white-space: nowrap;
}

.problem-message {
    flex: 1;
    color: var(--text-primary);
}

.ai-fix-inline-btn {
    background: none;
    border: 1px solid transparent;
    padding: 0 4px;
    cursor: pointer;
    font-size: 12px;
    border-radius: 3px;
    opacity: 0.5;
    transition: all 0.15s;
    flex-shrink: 0;
}

.problem-item:hover .ai-fix-inline-btn {
    opacity: 1;
}

.ai-fix-inline-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-blue);
    opacity: 1;
}

/* Dependency install spinner */
@keyframes dep-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-add-dep.installing {
    pointer-events: none;
    opacity: 0.7;
    min-width: 70px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-add-dep .dep-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: dep-spin 0.6s linear infinite;
}

.btn-add-dep.installed {
    background: var(--accent-green);
    pointer-events: none;
}

.btn-add-dep.install-failed {
    background: var(--accent-red);
    pointer-events: none;
}

/* ======================================
   Snippets Gallery
   ====================================== */
.snippets-toolbar {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
}

.snippets-search {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    box-sizing: border-box;
}

.snippets-search:focus {
    border-color: var(--accent-blue);
}

.snippets-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.snippet-filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.snippet-filter-btn:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.snippet-filter-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

.snippets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
    padding: 10px;
    overflow-y: auto;
    max-height: calc(100% - 80px);
}

#panel-snippets {
    overflow-y: auto;
}

.snippet-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.snippet-card:hover {
    border-color: var(--accent-blue);
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.snippet-card-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-left: 8px;
    margin-bottom: 6px;
}

.snippet-cat-icon {
    font-size: 14px;
}

.snippet-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.snippet-desc {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.snippet-actions {
    display: flex;
    gap: 4px;
}

.snippet-btn {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
    white-space: nowrap;
}

.snippet-btn:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.snippet-btn-insert:hover {
    border-color: var(--accent-blue);
    background: rgba(14, 99, 156, 0.2);
}

.snippet-btn-play:hover {
    border-color: var(--accent-green, #4caf50);
    background: rgba(76, 175, 80, 0.2);
    color: #81c784;
}

.snippet-btn-copy:hover {
    border-color: #ba68c8;
    background: rgba(186, 104, 200, 0.15);
}

/* Responsive - single column on small panels */
@media (max-width: 500px) {
    .snippets-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== INTERACTIVE LESSONS ==================== */

.lessons-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.lessons-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.lessons-header h3 {
    margin: 0 0 12px 0;
    font-size: 15px;
    color: var(--text-primary);
}

.lessons-progress-bar {
    position: relative;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
}

.lessons-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), #00bcd4);
    border-radius: 12px;
    transition: width 0.5s ease;
}

.lessons-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.lessons-modules {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.lessons-module {
    margin-bottom: 8px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.lessons-module-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.lessons-module-header:hover {
    background: var(--bg-tertiary);
}

.module-icon {
    font-size: 18px;
}

.module-title {
    flex: 1;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
}

.module-progress {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
}

.module-toggle {
    font-size: 10px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.lessons-module.expanded .module-toggle {
    transform: rotate(180deg);
}

.lessons-module-content {
    display: none;
    padding: 5px 10px 10px 10px;
    background: var(--bg-primary);
}

.lessons-module.expanded .lessons-module-content {
    display: block;
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
    margin: 4px 0;
}

.lesson-item:hover {
    background: var(--bg-secondary);
}

.lesson-item.current {
    background: rgba(14, 99, 156, 0.15);
    border: 1px solid var(--accent-blue);
}

.lesson-item.completed {
    opacity: 0.7;
}

.lesson-item.completed:hover {
    opacity: 1;
}

.lesson-status {
    font-size: 14px;
    flex-shrink: 0;
}

.lesson-info {
    flex: 1;
    min-width: 0;
}

.lesson-title {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lesson-meta {
    display: block;
    font-size: 10px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.lessons-actions {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.lessons-actions .btn {
    flex: 1;
    font-size: 12px;
    padding: 8px 12px;
}

/* Lesson Modal */
.lesson-modal .modal-content {
    width: 95%;
    max-width: 900px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.lesson-modal-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.lesson-modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: relative;
    flex-shrink: 0;
}

.lesson-modal-header .modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
}

.lesson-modal-header .modal-close:hover {
    color: var(--text-primary);
}

.lesson-badge {
    display: inline-block;
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.lesson-modal-header h2 {
    margin: 0 0 8px 0;
    font-size: 20px;
    color: var(--text-primary);
}

.lesson-description {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 0 0 10px 0;
}

.lesson-meta-bar {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--text-secondary);
}

.completed-badge {
    color: #4caf50;
}

.lesson-modal-body {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.lesson-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.lesson-tab {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.lesson-tab:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.lesson-tab.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.lesson-tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.lesson-tab-content.active {
    display: block;
}

/* Theory Content */
.lesson-theory {
    line-height: 1.7;
    color: var(--text-primary);
}

.lesson-theory h2 {
    font-size: 18px;
    margin: 25px 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.lesson-theory h3 {
    font-size: 15px;
    margin: 20px 0 10px 0;
    color: var(--text-primary);
}

.lesson-theory h4 {
    font-size: 13px;
    margin: 15px 0 8px 0;
    color: var(--text-secondary);
}

.lesson-theory p {
    margin: 10px 0;
}

.lesson-theory strong {
    color: var(--accent-blue);
}

.lesson-code-wrapper {
    position: relative;
    margin: 15px 0;
}

.lesson-code-toolbar {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 6px;
    z-index: 10;
}

.lesson-code-play,
.lesson-code-copy {
    padding: 4px 10px;
    font-size: 11px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.lesson-code-play:hover {
    background: rgba(76, 175, 80, 0.2);
    border-color: #4caf50;
    color: #81c784;
}

.lesson-code-copy:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.lesson-code {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    padding-top: 40px;
    overflow-x: auto;
    font-family: 'Fira Code', 'SF Mono', monospace;
    font-size: 12px;
    line-height: 1.5;
    margin: 0;
}

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

.inline-code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Fira Code', 'SF Mono', monospace;
    font-size: 11px;
    color: #ce9178;
}

/* Syntax highlighting */
.lesson-code .kw { color: #569cd6; }
.lesson-code .str { color: #ce9178; }
.lesson-code .cmt { color: #6a9955; }
.lesson-code .num { color: #b5cea8; }

.lesson-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
    font-size: 12px;
}

.lesson-table th,
.lesson-table td {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.lesson-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
}

.lesson-table td {
    background: var(--bg-primary);
}

/* Quiz Exercise */
.lesson-quiz h4,
.lesson-fill-code h4,
.lesson-write-code h4 {
    margin: 0 0 15px 0;
    font-size: 15px;
    color: var(--text-primary);
}

.quiz-question {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--accent-blue);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.quiz-option:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-blue);
}

.quiz-option input {
    width: auto;
    accent-color: var(--accent-blue);
}

.quiz-option-text {
    flex: 1;
    font-size: 13px;
}

.quiz-feedback {
    font-size: 12px;
    font-weight: 600;
}

.quiz-option.correct .quiz-feedback {
    color: #4caf50;
}

.quiz-option.incorrect .quiz-feedback {
    color: #f44336;
}

.quiz-option.correct-answer {
    border-color: #4caf50;
    background: rgba(76, 175, 80, 0.1);
}

.quiz-explanation {
    margin-top: 15px;
    padding: 15px;
    background: rgba(14, 99, 156, 0.1);
    border-radius: 8px;
    border-left: 4px solid var(--accent-blue);
}

.quiz-explanation p {
    margin: 0;
    font-size: 13px;
    color: var(--text-secondary);
}

/* Fill Code Exercise */
.fill-code-template {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Fira Code', 'SF Mono', monospace;
    font-size: 12px;
    line-height: 1.8;
    overflow-x: auto;
    margin-bottom: 15px;
}

.code-blank {
    width: 100px;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--accent-blue);
    border-radius: 4px;
    font-family: inherit;
    font-size: inherit;
    color: var(--text-primary);
}

.code-blank:focus {
    outline: none;
    border-style: solid;
    background: var(--bg-secondary);
}

.code-blank.correct {
    border-color: #4caf50;
    background: rgba(76, 175, 80, 0.1);
}

.code-blank.incorrect {
    border-color: #f44336;
    background: rgba(244, 67, 54, 0.1);
}

.fill-code-hints {
    padding: 12px 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 12px;
}

.fill-code-hints strong {
    color: var(--text-secondary);
}

.fill-code-hints ul {
    margin: 8px 0 0 20px;
    padding: 0;
}

.fill-code-hints li {
    color: var(--text-secondary);
    margin: 4px 0;
}

.fill-code-solution {
    margin-top: 15px;
    padding: 15px;
    background: rgba(76, 175, 80, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.fill-code-solution h5 {
    margin: 0 0 10px 0;
    color: #4caf50;
    font-size: 12px;
}

/* Write Code Exercise */
.lesson-write-code .code-editor {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Fira Code', 'SF Mono', monospace;
    font-size: 12px;
    color: var(--text-primary);
    resize: vertical;
    margin-bottom: 15px;
}

.lesson-write-code .code-editor:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.write-code-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.write-code-output {
    padding: 15px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: monospace;
    font-size: 12px;
    min-height: 50px;
    white-space: pre-wrap;
}

/* Modal Footer */
.lesson-modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.lesson-modal-footer .btn {
    min-width: 120px;
}

/* Expand all modules by default */
.lessons-module {
    /* Start expanded */
}

/* Animation for module content */
.lessons-module-content {
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive for lessons */
@media (max-width: 600px) {
    .lesson-modal .modal-content {
        width: 100%;
        max-width: none;
        height: 100%;
        max-height: none;
        border-radius: 0;
    }
    
    .lesson-tabs {
        overflow-x: auto;
    }
    
    .lesson-tab {
        white-space: nowrap;
    }
}