* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f5f5;
    height: 100vh;
    overflow: hidden;
}

.main-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.tab-content {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.tab-frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    display: none;
}

.tab-frame.active {
    display: block;
}

.tab-bar {
    display: flex;
    background: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: 8px 0;
    justify-content: space-around;
    z-index: 100;
}

.tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: all 0.2s;
    color: #999;
}

.tab-btn.active {
    color: #667eea;
}

.tab-btn:active {
    transform: scale(0.95);
}

.tab-icon {
    font-size: 24px;
}

.tab-label {
    font-size: 12px;
    font-weight: 500;
}