:root {
    --bg-dark: #1e1e1e;
    --bg-medium: #252526;
    --bg-light: #333333;
    --text-primary: #cccccc;
    --text-secondary: #8e8e8e;
    --accent-blue: #007acc;
    --border-color: #444444;
    --font-ui: 'Inter', sans-serif;
    --font-code: 'Roboto Mono', monospace;
    --danger-red: #f44336;
    --warning-yellow: #ffc107;
}

body, html {
    margin: 0; padding: 0; width: 100%; height: 100%;
    overflow: hidden; font-family: var(--font-ui);
    background-color: var(--bg-medium);
}

#app-container { display: grid; grid-template-columns: 280px 1fr; height: 100vh; }

/* Sidebar */
.sidebar {
    background-color: var(--bg-medium); color: var(--text-primary);
    display: flex; flex-direction: column; border-right: 1px solid var(--border-color);
}
.sidebar-header {
    padding: 1rem; display: flex; justify-content: space-between;
    align-items: center; border-bottom: 1px solid var(--border-color);
}
.sidebar-header h2 { margin: 0; font-size: 1.2rem; }
.header-btn {
    background-color: var(--accent-blue); color: white; border: none;
    padding: 0.5rem 0.8rem; border-radius: 5px; cursor: pointer;
    font-family: var(--font-ui); font-weight: 500; transition: background-color 0.2s ease;
}
.header-btn:hover { background-color: #005a9e; }

/* File Explorer */
.file-explorer { padding: 0.5rem; display: flex; flex-direction: column; overflow-y: auto; }
.file-actions { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }
.file-actions button {
    display: flex; align-items: center; gap: 0.5rem; padding: 0.6rem;
    background-color: var(--bg-light); border: 1px solid var(--border-color);
    color: var(--text-primary); border-radius: 4px; cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease; font-family: var(--font-ui); text-align: left;
}
.file-actions button:hover { background-color: #4d4d4d; }
.file-actions button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--bg-light);
}

#file-tree { color: var(--text-primary); font-size: 0.9rem; padding-left: 0; }
#file-tree ul { list-style: none; padding-left: 1rem; }
.tree-item {
    padding: 0.3rem 0.5rem; border-radius: 4px; cursor: pointer;
    display: flex; align-items: center; justify-content: space-between;
}
.tree-item:not(.active):hover { background-color: var(--bg-light); }
.tree-item.active { background-color: var(--accent-blue); }
.tree-item-name { display: flex; align-items: center; gap: 0.5rem; flex-grow: 1; }
.delete-btn {
    visibility: hidden; color: var(--text-secondary); background: none;
    border: none; cursor: pointer; font-size: 0.8rem; padding: 0.2rem 0.5rem;
}
.tree-item:hover .delete-btn { visibility: visible; }
.delete-btn:hover { color: var(--danger-red); }

/* Main Content */
.main-content { display: grid; grid-template-columns: 1fr 1fr; background-color: #fff; }
#editor-container { position: relative; background-color: var(--bg-dark); }
#editor { position: absolute; inset: 0; font-size: 14px; }
#editor-placeholder {
    display: flex; flex-direction: column; justify-content: center;
    align-items: center; height: 100%; color: var(--text-secondary);
}
#editor-placeholder i { font-size: 3rem; margin-bottom: 1rem; }

/* Preview & Console Area */
.preview-console-container { display: flex; flex-direction: column; border-left: 1px solid #ddd; }
.pc-tabs { display: flex; border-bottom: 1px solid #ddd; background-color: #f7f7f7; }
.pc-tab-btn {
    padding: 0.6rem 1rem; border: none; background: none; cursor: pointer;
    color: #555; font-family: var(--font-ui); font-size: 0.9rem;
    border-bottom: 2px solid transparent;
}
.pc-tab-btn.active { border-bottom-color: var(--accent-blue); color: #111; font-weight: 500; }
.pc-content { flex-grow: 1; position: relative; }
.pc-panel { position: absolute; inset: 0; display: none; flex-direction: column; }
.pc-panel.active { display: flex; }
#preview-frame { width: 100%; height: 100%; border: none; }

/* Console Styles */
#console-wrapper { background-color: var(--bg-dark); color: var(--text-primary); }
.console-toolbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.5rem 1rem; background-color: var(--bg-medium);
    border-bottom: 1px solid var(--border-color); font-size: 0.9rem;
}
#clear-console-btn {
    background: none; border: 1px solid var(--border-color); color: var(--text-primary);
    padding: 0.2rem 0.5rem; border-radius: 4px; cursor: pointer; display: flex; align-items: center; gap: 0.4rem;
}
#console-output {
    flex-grow: 1; overflow-y: auto; padding: 0.5rem; font-family: var(--font-code);
    font-size: 0.85rem; line-height: 1.6;
}
.log-msg { padding: 0.1rem 0.5rem; border-bottom: 1px solid var(--bg-light); white-space: pre-wrap; }
.log-msg.log-error { color: var(--danger-red); }
.log-msg.log-warn { color: var(--warning-yellow); }
.log-msg.log-info { color: #64b5f6; }

/* Modal Styles */
.modal-overlay {
    position: fixed; inset: 0; background-color: rgba(0, 0, 0, 0.6);
    display: flex; justify-content: center; align-items: center;
}
.modal-content {
    background-color: var(--bg-medium); color: var(--text-primary); padding: 2rem;
    border-radius: 8px; width: 90%; max-width: 500px; position: relative;
}
.modal-close {
    position: absolute; top: 10px; right: 15px; background: none; border: none;
    font-size: 1.8rem; color: var(--text-secondary); cursor: pointer;
}
.share-link-wrapper { display: flex; margin-top: 1rem; }
#share-link-input {
    flex-grow: 1; padding: 0.7rem; border: 1px solid var(--border-color);
    background-color: var(--bg-light); color: var(--text-primary);
    border-radius: 5px 0 0 5px; font-family: var(--font-code);
}
#copy-link-btn {
    padding: 0.7rem 1rem; border: 1px solid var(--accent-blue);
    background-color: var(--accent-blue); color: white;
    border-radius: 0 5px 5px 0; cursor: pointer;
}