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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.5;
    font-size: 14px;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 480px;
    margin: 0 auto;
    background-color: #f5f5f5;
    position: relative;
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    max-width: 480px;
    margin: 0 auto;
    height: 50px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    z-index: 100;
}

.back-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    text-decoration: none;
}

.back-btn svg {
    width: 24px;
    height: 24px;
}

.page-title {
    font-size: 16px;
    font-weight: 500;
    color: #333;
}

.placeholder {
    width: 40px;
}

.tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50px;
    background-color: #fff;
    display: flex;
    border-top: 1px solid #e5e5e5;
    z-index: 100;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    max-width: 480px;
    margin: 0 auto;
}

.tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: #666;
    text-decoration: none;
}

.tab-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 2px;
}

.tab-item.active {
    color: #97652B;
}

.tab-item.active .tab-icon {
    color: #97652B;
}