/* Basic Reset and Setup */
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; /* Use native system font */
    background-color: #f4f4f4; /* Light gray background */
    -webkit-tap-highlight-color: transparent; /* Remove default tap highlight on mobile */
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 500px; /* Optional: Constrain width for a typical phone screen size on desktop */
    margin: 0 auto;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* Header Styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 15px;
    height: 50px;
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    position: sticky;
    top: 0;
    color: #007aff; /* iOS blue tint for buttons */
}

.header-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #000;
}

.header-button {
    background: none;
    border: none;
    color: inherit;
    font-size: 16px;
    cursor: pointer;
}

/* Content and List Styling */
.app-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.settings-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-item {
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #333;
}

.list-item:last-child {
    border-bottom: none;
}

/* Navigation Bar Styling */
.app-nav {
    display: flex;
    justify-content: space-around;
    height: 60px;
    border-top: 1px solid #ddd;
    background-color: #fff;
    box-shadow: 0 -1px 5px rgba(0,0,0,0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex: 1;
    text-decoration: none;
    color: #8e8e93; /* Default gray for inactive items */
    font-size: 12px;
}

.nav-item.active {
    color: #007aff; /* Active blue tint */
}

/* Basic Toggle Switch (mimics native iOS switch) */
/* You would need more CSS for a fully functional, stylized switch, but this is a placeholder */
.switch { opacity: 0.5; }