:root {
    --bg-dark: #1e1e1e;
    --bg-panel: #1e1e1e;
    --bg-activity-bar: #333333;
    --border-color: #3e3e3e;
    --text-primary: #cccccc;
    --text-secondary: #999999;
    --accent-color: #0e639c;
    --accent-hover: #1177bb;
    --input-bg: #3c3c3c;
    --input-border: #3e3e3e;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Google Sans, Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

a { text-decoration: none; color: inherit; }

/* --- Light Theme Overrides --- */
body.light-theme {
    --bg-dark: #ffffff;
    --bg-panel: #f3f3f3;
    --bg-activity-bar: #e8e8e8;
    --border-color: #e0e0e0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --input-bg: #ffffff;
    --input-border: #cccccc;
}

/* --- Shell Layout (The OS Desktop) --- */
.shell-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.activity-bar {
    width: 50px;
    background-color: var(--bg-activity-bar);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 10px;
    border-right: 1px solid var(--border-color);
}

.activity-icon {
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
    color: var(--text-secondary);
}

.activity-icon:hover, .activity-icon.active {
    opacity: 1;
    border-left: 2px solid var(--accent-color);
    color: var(--text-primary);
}

.main-stage {
    flex: 1;
    background-color: var(--bg-dark);
    display: flex;
    flex-direction: column;
    position: relative;
}

.tab-bar {
    height: 35px;
    background-color: var(--bg-panel);
    display: flex;
    align-items: center;
    overflow-x: auto;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: 0 15px;
    height: 100%;
    background-color: var(--bg-panel);
    color: var(--text-secondary);
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 120px;
}

.tab.active {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    border-top: 1px solid var(--accent-color);
}

.iframe-container {
    flex: 1;
    position: relative;
    width: 100%;
    height: 100%;
    background: #000;
}

/* --- Workspace Layout (Inside the Slot) --- */
.workspace-grid {
    display: grid;
    grid-template-columns: 350px 5px 1fr 5px 250px 50px; /* Chat Resizer Center Resizer Explorer ActivityBar */
    grid-template-rows: 40px 1fr 22px; /* Row 1: Header, Row 2: Content, Row 3: Footer */
    height: 100vh;
    width: 100vw;
    transition: grid-template-columns 0.2s ease-out;
}

/* --- Grid Areas --- */
.activity-bar { grid-column: 6; grid-row: 1 / span 2; border-left: 1px solid var(--border-color); border-right: none; }
.header-left { grid-column: 5; grid-row: 1; border-left: 1px solid var(--border-color); border-right: none; }
.header-center { grid-column: 3; grid-row: 1; }
.header-right { grid-column: 1; grid-row: 1; border-right: 1px solid var(--border-color); border-left: none; }

.content-left { grid-column: 5; grid-row: 2; border-left: 1px solid var(--border-color); border-right: none; background-color: var(--bg-panel); }
.content-center { grid-column: 3; grid-row: 2; background-color: var(--bg-dark); }
.content-right { grid-column: 1; grid-row: 2; border-right: 1px solid var(--border-color); border-left: none; background-color: #000000; }
.content-left { padding: 0; } /* Override panel-content padding for full-width tabs */

/* Global Footer */
.global-footer { grid-column: 1 / -1; grid-row: 3; border-top: 1px solid var(--border-color); z-index: 100; }

/* Resizers span both rows to allow simultaneous resizing */
#resizer-left { grid-column: 2; grid-row: 1 / span 2; }
#resizer-right { grid-column: 4; grid-row: 1 / span 2; }

/* --- Panel Styles --- */
.header-left, .header-right, .content-left, .content-right {
    background-color: var(--bg-panel);
}
.header-center, .content-center {
    background-color: var(--bg-dark);
}

/* Ensure content panels handle scrolling */
.content-left, .content-center, .content-right {
    overflow: hidden; /* Container handles overflow */
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.panel-header {
    padding: 10px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

/* --- Safety Catch (Header Controls) --- */
.safety-catch { display: flex; gap: 0; }
/* Inherits .view-toggle styles from workspace.php classes, but we ensure specific overrides if needed */
.safety-btn { font-weight: 600; }
.safety-btn[data-mode="handbrake"].active { background-color: #10b981; color: white; } /* Discuss: Safe (Green) */
.safety-btn[data-mode="accelerator"].active { background-color: #f59e0b; color: #1e1e1e; } /* Implement: Warning (Orange) */

/* --- Sidebar Toggles --- */
.sidebar-toggle { background: transparent; border: none; color: var(--text-secondary); cursor: pointer; font-size: 0.9rem; padding: 2px 5px; border-radius: 3px; display: flex; align-items: center; justify-content: center; }
.sidebar-toggle:hover { background-color: var(--bg-activity-bar); color: var(--text-primary); }


/* --- Editor Toolbar --- */
.editor-toolbar { display: flex; align-items: center; gap: 10px; }
.view-toggle { display: flex; background: var(--bg-activity-bar); border-radius: 3px; padding: 2px; }
.view-btn { background: transparent; border: none; color: var(--text-secondary); padding: 2px 8px; font-size: 0.75rem; cursor: pointer; border-radius: 2px; }
.view-btn.active { background: var(--accent-color); color: white; }

/* --- Editor Status Bar --- */
.status-bar {
    height: 100%; background-color: var(--accent-color); color: white; display: flex; align-items: center; padding: 0 10px; font-size: 0.75rem; justify-content: flex-end; gap: 15px;
}
.status-bar span { cursor: default; }
/* Override background for status bar to match VS Code blue or purple */
.status-bar { background-color: #007acc; }

.panel-content {
    flex: 1;
    overflow-y: auto;
    /* padding: 10px; */
}

/* --- Chat Panel --- */
.chat-panel { display: flex; flex-direction: column; height: 100%; }
.chat-messages { flex: 1; overflow-y: auto; padding-top: 10px; padding-bottom: 10px; padding-left: 5px; padding-right: 5px; display: flex; flex-direction: column; gap: 10px; }
.chat-input-area { padding: 10px; border-top: 1px solid var(--border-color); background: var(--bg-panel); display: flex; gap: 5px; }
.chat-input-area textarea { flex: 1; background: var(--input-bg); border: 1px solid var(--input-border); color: var(--text-primary); padding: 8px; resize: none; height: 40px; border-radius: 3px; font-family: inherit; outline: none; }
.chat-input-area textarea:focus { border-color: var(--accent-color); }
.chat-input-area button { background: var(--accent-color); color: white; border: none; padding: 0 15px; cursor: pointer; border-radius: 3px; font-weight: 600; }
.message { padding: 8px 12px; border-radius: 4px; font-size: 0.92rem; line-height: 1.4; max-width: 90%; word-wrap: break-word; }
.message.user { align-self: flex-end; background: var(--accent-color); color: white; }
.message.model { align-self: flex-start; background: var(--bg-panel); color: var(--text-primary); }
.message.system { align-self: center; font-style: italic; color: var(--text-secondary); font-size: 0.8rem; }
.message pre { background: #000; padding: 10px; border-radius: 4px; overflow-x: auto; margin: 5px 0; }

/* --- File Shortcuts (Silent Driver) --- */
.file-shortcut {
    display: inline-block;
    background-color: #2d2d2d;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 4px 8px;
    border-radius: 4px;
    margin: 4px 0;
    cursor: pointer;
    font-size: 0.85rem;
    text-align: left;
}
.file-shortcut:hover {
    background-color: var(--accent-color);
    color: white;
}

/* --- Thinking Block (Reasoning Models) --- */
.thinking-block {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    margin: 5px 0;
    border: 1px solid var(--border-color);
}
.thinking-block summary {
    padding: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    user-select: none;
    font-style: italic;
}
.thinking-block summary:hover {
    color: var(--text-primary);
}
.thinking-content {
    padding: 10px;
    border-top: 1px solid var(--border-color);
    font-family: monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    color: var(--text-secondary);
    max-height: 300px;
    overflow-y: auto;
}

/* --- Resizers --- */
.resizer {
    background: transparent;
    cursor: col-resize;
    z-index: 10;
    transition: background 0.2s;
}
.resizer:hover, .resizer.resizing { background: var(--accent-color); }

/* --- Chat History Overlay --- */
.chat-toolbar { padding: 5px 10px; background: var(--bg-panel); border-bottom: 1px solid var(--border-color); display: flex; justify-content: flex-end; gap: 10px; }
.chat-toolbar button { background: transparent; border: none; color: var(--text-secondary); cursor: pointer; font-size: 0.85rem; }
.chat-toolbar button:hover { color: var(--text-primary); }

.history-overlay { position: absolute; top: 35px; right: 0; bottom: 0; width: 100%; background: var(--bg-dark); border-left: 1px solid var(--border-color); z-index: 20; display: none; flex-direction: column; }
.history-overlay.open { display: flex; }
.history-list { flex: 1; overflow-y: auto; }
.history-item { padding: 10px; border-bottom: 1px solid var(--border-color); cursor: pointer; }
.history-item:hover { background: var(--bg-panel); }
.history-date { font-size: 0.75rem; color: var(--text-secondary); display: block; margin-bottom: 4px; }
.history-preview { font-size: 0.85rem; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }

/* --- Global UI Components (Forms, Cards, Tabs) --- */
.scroll-view { flex: 1; width: 100%; overflow-y: auto; box-sizing: border-box; padding: 2rem; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; border-bottom: 1px solid var(--border-color); padding-bottom: 1rem; }
.page-header h1 { color: var(--accent-color); margin: 0; }

.card { background: var(--bg-panel); padding: 1.5rem; border-radius: 4px; border: 1px solid var(--border-color); margin-bottom: 2rem; }
.card h2 { margin-top: 0; color: var(--text-primary); font-size: 1.2rem; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; margin-bottom: 15px; }

.form-group { margin-bottom: 1rem; }
label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text-secondary); }
input, select { width: 100%; padding: 8px; background: var(--input-bg); border: 1px solid var(--input-border); color: var(--text-primary); border-radius: 4px; box-sizing: border-box; }

button.btn-primary, button[type="submit"] { padding: 8px 16px; background: var(--accent-color); color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 0.9rem; }
button.btn-primary:hover, button[type="submit"]:hover { background: var(--accent-hover); }
button:disabled { background: #555; cursor: not-allowed; }

.alert { padding: 10px; border-radius: 4px; margin-bottom: 1rem; display: none; }
.alert.success { background: #2e3c2e; color: #4ec9b0; border: 1px solid #4ec9b0; }
.alert.error { background: #3c2e2e; color: #f48771; border: 1px solid #f48771; }

.tab-nav { display: flex; gap: 10px; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.tab-btn { background: transparent; border: none; color: var(--text-secondary); padding: 8px 16px; cursor: pointer; font-size: 1rem; border-bottom: 2px solid transparent; border-radius: 0; }
.tab-btn:hover { background: transparent; color: var(--text-primary); }
.tab-btn.active { color: var(--accent-color); border-bottom-color: var(--accent-color); font-weight: bold; }

/* --- VS Code Style Scrollbar --- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #424242; }
::-webkit-scrollbar-thumb:hover { background: #4f4f4f; }
::-webkit-scrollbar-corner { background: transparent; }