:root {
    --bg-main: #09090b;
    --bg-panel: #18181b;
    --bg-editor: #0f0f12;
    --card-border: rgba(255, 255, 255, 0.1);
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #22c55e;
    --error: #ef4444;
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 30px 30px;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(24, 24, 27, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 700;
}
.logo i { font-size: 1.5rem; }

.header-actions {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 10px 18px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
    border: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-panel); color: var(--text-main); border: 1px solid var(--card-border); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); }

.workspace {
    flex: 1;
    display: flex;
    padding: 20px;
    gap: 20px;
    min-height: 0;
}

.editor-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-editor);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--card-border);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 5px;
    border-radius: 4px;
    transition: 0.2s;
}
.btn-icon:hover { color: var(--text-main); background: rgba(255,255,255,0.1); }

textarea {
    flex: 1;
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 20px;
    resize: none;
    outline: none;
}
textarea::placeholder { color: rgba(255,255,255,0.2); }
textarea[readonly] { color: var(--primary); }

.status-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}
.status-badge.success { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.status-badge.error { background: rgba(239, 68, 68, 0.2); color: var(--error); }