/* ===== Base Reset & Layout ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.4;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

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

.hidden {
    display: none !important;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ===== Status Bar ===== */
.status-bar {
    display: flex;
    align-items: center;
    padding: 2px 12px;
    background: var(--status-bar-bg);
    color: var(--status-bar-text);
    font-size: 12px;
    flex-shrink: 0;
    height: 24px;
}

/* ===== Splitter ===== */
.splitter {
    width: 4px;
    cursor: col-resize;
    background: var(--splitter-color);
    flex-shrink: 0;
    transition: background 0.15s;
}

.splitter:hover,
.splitter.active {
    background: var(--splitter-hover);
}