@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    --bg-primary: #0b0f19;
    --bg-sidebar: #111827;
    --bg-panel: #1f2937;
    --bg-console: #030712;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-blue: #3b82f6;
    --accent-indigo: #6366f1;
    
    --success: #10b981;
    --danger: #ef4444;
    
    --border-color: rgba(255, 255, 255, 0.1);
    
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-blue));
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.logo-text {
    font-weight: 700;
    font-size: 1.1rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
}

.btn {
    font-family: var(--font-sans);
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
}

.btn-primary {
    background: var(--accent-indigo);
    color: white;
}
.btn-primary:hover { background: #4f46e5; }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.4rem 0.75rem;
}
.btn-ghost:hover { color: white; background: rgba(255,255,255,0.05); }

/* Main Layout */
.app-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.category-group {
    margin-bottom: 0.5rem;
}

.category-header {
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
    color: var(--text-muted);
}

.koan-item {
    padding: 0.5rem 1rem 0.5rem 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.koan-item:hover {
    background: rgba(255,255,255,0.03);
    color: white;
}

.koan-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-blue);
    border-left: 3px solid var(--accent-blue);
}

.koan-status {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    display: inline-block;
}

.koan-item.completed .koan-status {
    border-color: var(--success);
    background: var(--success);
    position: relative;
}

/* IDE Workspace */
.ide-workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1rem;
    gap: 1rem;
    overflow: hidden;
    background: var(--bg-primary);
}

.glass-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

/* Task Panel */
.task-panel {
    height: 35%;
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tag {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.task-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.task-content {
    padding: 1rem;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.task-content p { margin-bottom: 0.75rem; }
.task-content code {
    background: rgba(255,255,255,0.1);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent-blue);
}

/* Editor Section */
.editor-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #191a21; /* Match dracula */
    border-bottom: 1px solid #000;
}

.tab {
    padding: 0.5rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: #282a36;
    color: white;
    border-top: 2px solid var(--accent-indigo);
}

.editor-actions { padding: 0 0.5rem; }

.editor-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

/* CodeMirror Overrides */
.CodeMirror {
    height: 100% !important;
    font-family: var(--font-mono) !important;
    font-size: 14px;
    background: #282a36 !important;
}

/* Console Panel */
.console-panel {
    height: 120px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-console);
    display: flex;
    flex-direction: column;
}

.console-header {
    padding: 0.4rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    background: #111827;
    border-bottom: 1px solid var(--border-color);
}

.console-body {
    padding: 0.75rem 1rem;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    flex: 1;
}

.console-info { color: var(--text-secondary); }
.console-success { color: var(--success); display: flex; align-items: center; gap: 0.5rem; font-weight: 600;}
.console-error { color: var(--danger); display: flex; flex-direction: column; gap: 0.25rem;}
.console-error-header { font-weight: 600; display: flex; align-items: center; gap: 0.5rem;}

/* Scrollbars */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }