.layout-container{flex-direction:column;min-height:100vh;display:flex}.app-header{background-color:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:100;height:60px;box-shadow:var(--shadow-sm);justify-content:center;align-items:center;display:flex;position:sticky;top:0}.logo{color:var(--color-primary);font-size:20px;font-weight:800}@media (max-width:480px){.logo{font-size:20px}.language-selector{padding:4px 8px;font-size:12px}}.language-selector{border:1px solid var(--color-border);background-color:var(--color-surface);color:var(--color-text-primary);cursor:pointer;border-radius:8px;outline:none;padding:8px;font-size:14px}.app-content{flex:1;padding-bottom:60px}.app-footer{text-align:center;color:var(--color-text-secondary);background-color:var(--color-bg);padding:20px;font-size:12px}